CN105787237A - Read-write posture monitoring method and device - Google Patents
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Abstract
The invention provides a read-write posture monitoring method and device. The method and the device are used for overcoming at least one of the defects of the existing read-write posture monitoring technique that the misjudgment rate is high, a fake read-write posture cannot be identified, follow-up read-write posture estimation cannot be carried out and there is no energy saving measure. The read-write posture monitoring method comprises following steps of obtaining reference read-write posture parameters; determining a basic change range of read-write postures; identifying whether the read-write posture change exceeds the basic range or not; and identifying abnormal read-write postures. The method and the device provided by the embodiment of the invention conform to natural moving rules of the read-write postures, are high in identification accuracy, can be used for immediate prompting in the read-write process, also can be used for estimation after the read-write postures are monitored and have practicability.
Description
Technical Field
The invention relates to the field of behavioral education, in particular to a reading and writing posture monitoring method and device.
Background
The good reading and writing posture is favorable for skeletal development and eyesight maintenance of children, in order to cultivate the good reading and writing posture of children, a plurality of monitoring methods and correction methods are generated, the mechanical reading and writing posture correction device is provided with an electronic monitoring and reminding device, wherein the mechanical correction device comprises a limiting support arranged on a desk, a limiting bandage arranged on a seat, a chin rest arranged on the chin of the children and the like, the electronic monitoring and reminding device comprises an inclination detector arranged on the head to monitor head inclination, an infrared detector arranged on a desk lamp to detect changes of body postures, and a distance measuring module arranged on glasses to monitor reading distance and the like. Currently in the field of patent applications, the following techniques have emerged for monitoring sitting or reading and writing postures using electronic methods:
the utility model has the application number of CN202171700U, and the utility model provides a glasses structure and sitting posture prompting method of "glasses that can correct sitting posture" does: glasses include lens, picture frame and left and right mirror holder, characterized by: glasses still include an autoalarm, and autoalarm is by miniature battery case, controller, range finding sensor and alarm, and wherein includes a single chip microcomputer system in the controller, miniature battery case and controller set up respectively in left and right mirror holder, and range finding sensor and alarm set up in the picture frame, and the signal input part of controller is connected with range finding sensor's signal output part, and the signal output part of controller is connected with the signal input part of alarm. When people read books or read computers, the distance between eyes of the people and the books or the computers is smaller than the set distance, the distance measuring sensor can sense the barrier books or the computer display screen, signals are transmitted to the controller, and the controller controls the alarm to remind people of ensuring the sitting posture.
The utility model discloses a writing position of sitting warning appearance of correcting of utility model number CN2710065Y, application name "position of sitting warning appearance of correcting", it is a control box of installation on the connecting rod of earphone, is equipped with metal ball switch and music piece in the control box. The alarm switch is inclined, and the ball is connected with the circuit to enable the music piece to sound and alarm, so that a user is reminded of keeping a correct sitting posture and a good writing habit in time, and the aims of protecting eyesight and preventing myopia are fulfilled.
In summary, the existing sitting posture/reading and writing posture monitoring technology has the following disadvantages:
the reading and writing posture abnormity judgment link does not reflect the natural change attribute of the reading and writing posture, the reading and writing posture monitoring is simply equal to the reading and writing distance monitoring or is equal to the head tilting monitoring, so that a single event (a single distance threshold or an angle threshold is set) is adopted to trigger the reading and writing posture correction prompt, the false alarm rate is high, and the monitored child can generate conflict psychology or bear psychological pressure on the monitoring;
the reading and writing posture monitoring method does not provide a pseudo reading and writing posture identification method, the condition of escaping monitoring can occur in the process of monitoring and correcting the reading and writing posture of the children, and the children can place the monitor in front of a pseudo reading and writing object to enable the pseudo reading and writing object to cheat the monitor, so that the pseudo reading and writing posture needs to be identified;
the reading and writing posture monitoring method does not provide a method for recording, transmitting and evaluating reading and writing posture data, which is required for analyzing the reading and writing posture performance of children or the change situation of the reading and writing posture habit;
the reading and writing posture monitoring method does not provide a power saving method for the monitoring device when the monitored person interrupts reading and writing.
Disclosure of Invention
The invention provides a reading and writing posture monitoring method and a device, which are used for overcoming at least one of the defects of high misjudgment rate, incapability of identifying false reading and writing postures, incapability of being used for reading and writing posture evaluation afterwards and lack of energy-saving measures in the conventional reading and writing posture monitoring technology.
The invention provides a reading and writing posture monitoring method, which comprises the following steps:
obtaining a reference reading and writing posture parameter, wherein the reference reading and writing posture parameter comprises at least one of the following parameters:
a predetermined reference distance value from the eye/ranging sensor to the reading and writing object;
the distance data from the distance measuring sensor at the first position to the read-write object in a specific direction; and
the inclination angle sensor at the second position acquires a reference azimuth angle of the face/head, wherein the reference azimuth angle is an angle value relative to a specific reference direction;
determining a basic variation range of the reading and writing posture, comprising: determining a basic variation range of the reading and writing posture according to a preset basic variation of the reading and writing posture parameters by taking the reference reading and writing posture parameters as reference, and specifically determining at least one parameter value as follows:
a minimum value of distance data of the ranging sensor at the first position to the reader/writer in the first direction;
a maximum value of distance data of the ranging sensor at the first position to the reader/writer in the first direction; and
range of angular value variation of the face/head with respect to the reference azimuth;
the reading and writing posture change beyond basic range recognition comprises the following steps: acquiring a reading and writing posture parameter, comparing the reading and writing posture parameter with the reference reading and writing posture parameter to obtain a reading and writing posture parameter variation, judging the reading and writing posture state to be in a state beyond a basic range if the reading and writing posture parameter variation exceeds a preset reading and writing posture parameter basic variation, and otherwise, judging the reading and writing posture state to be in a state within the basic range;
abnormal reading and writing gesture recognition, which comprises at least one recognition operation of the following steps:
potential abnormal read-write gesture recognition, comprising: after the state that the read-write posture changes beyond the basic range is identified, the state is taken as a potential abnormal read-write posture state;
the long-time ultra-basic range identification of the read-write posture change comprises the following steps: after the state that the read-write posture changes beyond the basic range is identified, the duration time of the state is further judged, if the duration time exceeds a preset time threshold beyond the basic range, the state is judged to be an abnormal read-write posture state, and if not, the state is judged to be a short-time occasional state;
the short-time ultra-basic range identification of frequent read-write posture change comprises the following steps: after recognizing that the read-write posture changes beyond the basic range state and judging the state as a short-time occasional state, further judging whether the short-time occasional state appears in a time interval before the state occurs, if not, judging the state as the short-time occasional state, and if so, judging the state as an abnormal read-write posture state;
read-write gesture interrupt recognition comprising: after the state that the read-write posture changes beyond the basic range is identified, and the distance between the distance measuring sensor and the read-write object exceeds a preset interrupt distance threshold, the read-write posture is judged to be in an interrupt state; and the number of the first and second groups,
pseudo read-write gesture recognition, comprising: and after two or more than two states in the basic range are continuously identified in the time interval II, comparing corresponding reading and writing posture parameters of the states in the basic range appearing at different time points, if the difference value between the corresponding reading and writing posture parameters is smaller than a preset reading and writing posture natural change threshold, judging the state in the basic range as a pseudo reading and writing posture state, otherwise, judging the state as a normal reading and writing posture state.
The invention provides a reading and writing posture monitoring device, which comprises:
a reference reading and writing posture parameter obtaining unit, a reading and writing posture basic change range determining unit, a reading and writing posture change beyond basic range identifying unit, an abnormal reading and writing posture identifying unit and a sensor unit; wherein,
the reference reading and writing posture parameter acquiring unit is used for acquiring at least one of the following parameters:
a predetermined reference distance value from the eye/ranging sensor to the reading and writing object;
the distance data from the distance measuring sensor at the first position to the read-write object in a specific direction; and
the inclination angle sensor at the second position acquires a reference azimuth angle of the face/head, wherein the reference azimuth angle is an angle value relative to a specific reference direction;
the reference reading and writing posture parameter acquisition unit sends the distance data and/or the reference azimuth angle data to the reading and writing posture basic change range determination unit;
the reading and writing posture basic variation range determining unit is used for determining the basic variation range of the reading and writing posture according to the pre-stored preset reading and writing posture parameter basic variation by taking the reference reading and writing posture parameter acquired by the reference reading and writing posture parameter acquiring unit as a reference, and specifically comprises the following at least one parameter value:
a minimum value of distance data of the ranging sensor at the first position to the reader/writer in the first direction;
a maximum value of distance data of the ranging sensor at the first position to the reader/writer in the first direction; and
range of angular value variation of the face/head with respect to the reference azimuth;
the reading and writing posture change beyond basic range identification unit is used for identifying whether the reading and writing posture change exceeds the basic range, and the executed identification method comprises the following steps: acquiring a reading and writing posture parameter, comparing the reading and writing posture parameter with the reference reading and writing posture parameter to obtain a reading and writing posture parameter variation, judging the reading and writing posture state to be in a state beyond a basic range if the reading and writing posture parameter variation exceeds a preset reading and writing posture parameter basic variation, and otherwise, judging the reading and writing posture state to be in a state within the basic range;
the abnormal reading and writing gesture recognition unit is used for executing at least one recognition operation of the following operations:
potential abnormal read-write gesture recognition, comprising: after the state that the read-write posture changes beyond the basic range is identified, the state is taken as a potential abnormal read-write posture state;
the long-time ultra-basic range identification of the read-write posture change comprises the following steps: after the state that the read-write posture changes beyond the basic range is identified, the duration time of the state is further judged, if the duration time exceeds a preset time threshold beyond the basic range, the state is judged to be an abnormal read-write posture state, and if not, the state is judged to be a short-time occasional state;
the short-time ultra-basic range identification of frequent read-write posture change comprises the following steps: after recognizing that the read-write posture changes beyond the basic range state and judging the state as a short-time occasional state, further judging whether the short-time occasional state appears in a time interval before the state occurs, if not, judging the state as the short-time occasional state, and if so, judging the state as an abnormal read-write posture state;
read-write gesture interrupt recognition comprising: after the state that the change of the reading and writing posture exceeds the basic range is identified, and after the distance between the reading and writing posture and the sensor exceeds a preset interrupt distance threshold, the state is judged as the read and writing posture interrupt state; and the number of the first and second groups,
pseudo read-write gesture recognition, comprising: after two or more than two states in the basic range are continuously identified in the time interval II, corresponding reading and writing posture parameters of the states in the basic range appearing at different time points are compared, if the difference value between the corresponding reading and writing posture parameters is smaller than a preset reading and writing posture natural change threshold, the state in the basic range is judged to be a pseudo reading and writing posture state, otherwise, the state is judged to be a normal reading and writing posture state;
the abnormal reading and writing posture identification unit acquires the identification result from the reading and writing posture change over basic range identification unit and acquires the current reading and writing posture parameter from the sensor unit;
the sensor unit is used for acquiring distance information and/or angle information and comprises an ultrasonic sensing unit and/or an inclination angle sensing unit.
The reading and writing posture monitoring method and the device provided by the embodiment of the invention are used for reading and writing posture monitoring, can overcome at least one of the defects of high misjudgment rate, incapability of identifying false reading and writing postures, incapability of being used for reading and writing posture evaluation afterwards and lack of energy-saving measures in the conventional reading and writing posture monitoring technology, and have practicability.
Drawings
FIG. 1 is a flow chart of a method for monitoring reading and writing gestures according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a manner for obtaining a reference reading/writing posture parameter according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a second method for obtaining a reference reading/writing posture parameter according to an embodiment of the present invention;
fig. 4 is a schematic composition diagram of a reading/writing posture monitoring apparatus according to an embodiment of the present invention.
Examples
The reading and writing posture monitoring method and the device provided by the embodiment of the invention are used for reading and writing posture monitoring, and aim to overcome at least one of the defects of high misjudgment rate, incapability of identifying false reading and writing postures, incapability of being used for post reading and writing posture evaluation and lack of energy-saving measures in the conventional reading and writing posture monitoring technology.
For ease of description and understanding of the embodiments provided herein, the following description sets forth a basic concept relating to read-write gestures.
Reading and writing gestures include gestures while reading and gestures while writing. The human body is not textured in normal reading and writing postures, but has two basic characteristics: 1) the reading and writing posture can naturally change in a basic change range around the reference reading and writing posture, which is required for relieving fatigue, for example, the head and the chest can rotate under the reading and writing state, and the chest can tilt forwards or backwards moderately; 2) the reading and writing posture occasionally exceeds the basic variation range for a short time, for example, the reading and writing posture occasionally bends down to pick up things or scratch itch in the sitting or reading and writing state, and the eye position occasionally exceeds the basic variation range to be close to the reading/writing things for the purpose of seeing one detail. To accurately recognize abnormal reading and writing gestures, the two basic characteristics are embodied in the abnormal reading and writing gesture recognition criterion.
In the existing reading and writing posture monitoring technology, the natural change attribute of the reading and writing posture is not reflected in the reading and writing posture abnormity judgment link, and a single event (a single distance threshold or an angle threshold is set) is adopted to trigger the reading and writing posture correction prompt, so that the false alarm rate is high, and the monitored child can generate conflict psychology or bear psychological pressure on the monitoring;
in the existing read-write gesture monitoring technology, a false read-write gesture recognition method is not provided, a situation that a child tries to avoid monitoring occurs in a monitored process, the child places a monitor in front of a false read-write object, the false read-write object cheats the monitor to replace the monitor to receive monitoring, the monitor monitors the false read-write gesture, and the false read-write gesture needs to be recognized;
in the existing reading and writing posture monitoring technology, a method for recording, transmitting and evaluating reading and writing posture data is not provided, which is required for analyzing and evaluating the reading and writing posture performance of children or the change situation of reading and writing posture habits;
in the existing reading and writing posture monitoring technology, a power-saving method of a monitor under the condition of reading and writing interruption is not provided.
The following describes an example of the read/write posture monitoring method and an example of the read/write posture monitoring device provided by the present invention with reference to the drawings.
Embodiment one, an example of a reading/writing posture monitoring method
Referring to fig. 1, an embodiment of a reading/writing posture monitoring method provided by the present invention includes the following steps:
step S110, obtaining a reference reading/writing posture parameter, where the reference reading/writing posture parameter includes at least one of:
a predetermined reference distance value from the eye/ranging sensor to the reading and writing object;
the distance data from the distance measuring sensor at the first position to the read-write object in a specific direction; and
the inclination angle sensor at the second position acquires a reference azimuth angle of the face/head, wherein the reference azimuth angle is an angle value relative to a specific reference direction;
step S120, determining a basic variation range of the reading/writing posture, including: determining a basic variation range of the reading and writing posture according to a preset basic variation of the reading and writing posture parameters by taking the reference reading and writing posture parameters as reference, and specifically determining at least one parameter value as follows:
a minimum value of distance data of the ranging sensor at the first position to the reader/writer in the first direction;
a maximum value of distance data of the ranging sensor at the first position to the reader/writer in the first direction; and
range of angular value variation of the face/head with respect to the reference azimuth;
step S130, recognizing whether the read-write posture changes exceed the basic range, comprising the following steps:
acquiring a reading and writing posture parameter, comparing the reading and writing posture parameter with the reference reading and writing posture parameter to obtain a reading and writing posture parameter variation, judging the reading and writing posture state to be in a state beyond a basic range if the reading and writing posture parameter variation exceeds a preset reading and writing posture parameter basic variation, and otherwise, judging the reading and writing posture state to be in a state within the basic range;
step S140, recognizing abnormal reading and writing gestures, including at least one of the following recognizing operations:
potential abnormal read-write gesture recognition, comprising: after the state that the read-write posture changes beyond the basic range is identified, the state is taken as a potential abnormal read-write posture state;
the long-time ultra-basic range identification of the read-write posture change comprises the following steps: after the state that the read-write posture changes beyond the basic range is identified, the duration time of the state is further judged, if the duration time exceeds a preset time threshold beyond the basic range, the state is judged to be an abnormal read-write posture state, and if not, the state is judged to be a short-time occasional state;
the short-time ultra-basic range identification of frequent read-write posture change comprises the following steps: after recognizing that the read-write posture changes beyond the basic range state and judging the state as a short-time occasional state, further judging whether the short-time occasional state appears in a time interval before the state occurs, if not, judging the state as the short-time occasional state, and if so, judging the state as an abnormal read-write posture state;
read-write gesture interrupt recognition comprising: after the state that the read-write posture changes beyond the basic range is identified, and the distance between the distance measuring sensor and the read-write object exceeds a preset interrupt distance threshold, the read-write posture is judged to be in an interrupt state; and the number of the first and second groups,
pseudo read-write gesture recognition, comprising: and after two or more than two states in the basic range are continuously identified in the time interval II, comparing corresponding reading and writing posture parameters of the states in the basic range appearing at different time points, if the difference value between the corresponding reading and writing posture parameters is smaller than a preset reading and writing posture natural change threshold, judging the state in the basic range as a pseudo reading and writing posture state, otherwise, judging the state as a normal reading and writing posture state.
In step S140, the value of the time threshold beyond the basic range ranges from 1 second to 10 seconds;
the value of the time interval I ranges from 1 second to 10 seconds;
the value range of the preset interrupt distance threshold is between 0.5 and 2 meters;
the value of the time interval II ranges from 1 minute to 10 minutes;
the reading and writing posture natural change threshold comprises a reading and writing posture natural change distance threshold and/or a reading and writing posture natural change angle threshold, and the value range of the natural change distance threshold is between 3 millimeters and 100 millimeters; the value range of the angle threshold of the natural change of the reading and writing posture is between 0.1 and 10 degrees.
The method of the present embodiment, wherein,
the step of obtaining the reference reading and writing posture parameter specifically includes at least one of the following:
reading a reference distance value from a predetermined eye/ranging sensor to a reading and writing object from a storage unit;
when a person to be monitored is in a reference reading and writing posture state, a distance measuring sensor positioned at a first position of the head of the person to be monitored is used for acquiring distance data from the sensor to a reading/writing object; and
when a person to be monitored is in a reference reading and writing posture state, acquiring a reference azimuth angle of the face/head by using an inclination angle sensor positioned at a second position of the head of the person to be monitored, wherein the reference azimuth angle is an angle value relative to a specific reference direction;
the step of obtaining the reading and writing posture parameters is used for obtaining the current reading and writing posture parameters of the monitored person, and specifically comprises at least one of the following steps:
acquiring distance data from a sensor to a current read/write object by using the sensor positioned at a first position of the head of the monitored person; and acquiring a current azimuth angle of the face/head using a sensor located at a second position of the head of the monitored person, the current azimuth angle being an angular value with respect to the specific reference direction;
wherein, the range finding sensor is ultrasonic sensor.
In this embodiment, the ultrasonic sensor is configured to measure a distance from a face/eyes of a human body to a reading/writing object, and the specific distance measurement method includes: the ultrasonic sensor transmits ultrasonic waves and receives the ultrasonic waves reflected by the read-write object, the transmission time T1 and the echo arrival time T2 of the ultrasonic waves are recorded, (T2-T1) are the round-trip time of the ultrasonic waves, the round-trip time of the ultrasonic waves multiplied by the propagation speed of the ultrasonic waves is the round-trip distance of the ultrasonic waves, and one half of the round-trip distance is the distance from the read-write object to the ultrasonic sensor, the face and the eyes.
In this embodiment, the tilt sensor is any one of a solid pendulum type, a liquid pendulum type, and a gas pendulum type, and is configured to measure a tilt angle of a face, a head, and an eye of a human body, and the specific distance measurement method is as follows: the tilt sensor is placed on the head of a human body, and the tilt angle of the sensor is changed along with the change of the tilt angle of the face/head/eyes of the human body, wherein the tilt angle is based on a specific reference direction, such as a horizontal direction or a vertical direction.
In this embodiment, the distance measuring sensor and the tilt sensor may be placed in any one of the following manners:
placing on the spectacle frame;
is placed on the head band;
placed on a head-mounted support having a similar support to the spectacle frame, for example, a support in the form of google glass.
The method for reading the reference distance value from the predetermined eye/ranging sensor to the reading and writing object from the storage unit takes the determined distance value, such as 1 ruler, as a typical/standard distance, and has the advantages of simple setting and the disadvantage of being not adaptive to individual characteristics, for example, for children with different vision conditions, a distance adaptive to natural reading and writing of the children can be set according to the specific sitting height, which is the reason why the reference distance value from the predetermined eye/ranging sensor to the reading and writing object is set through the reference reading and writing posture.
The operation method of the first method for acquiring the reference reading/writing posture parameter will be described below with reference to fig. 2:
in fig. 2, when the person to be monitored is in the reference reading/writing posture state, the ultrasonic sensor 210 located at the first position acquires data of a distance from the sensor 210/the face 231 of the person to be monitored to the reading/writing object 241 in the first direction 221;
using a distance data from the face 231/ultrasonic sensor 210 to the read/write object 241 of the person to be monitored in the reference read/write posture state as a reference read/write posture parameter; and/or
When the person to be monitored is in the reference reading and writing posture state, the inclination angle sensor 215 located at the second position acquires inclination angle data of the face 231/head/eye 230 of the person to be monitored;
data of a distance from the face 231 of the person to be monitored in the reference reading and writing posture state to the reading/writing object 241; and monitoring at least one of inclination data of the face 231/head/eye 230 of the person as a reference reading and writing posture parameter.
In fig. 2, the ultrasonic sensor 210 and the tilt sensor 215 are worn on the head by a support, which may be a support supported by using an ear 233, or a head band-shaped support; the output signals of the ultrasonic sensor 210 and the tilt sensor 215 are sent to the main module 218 through wires, and the main module 218 is placed at the waist or chest 232 of the monitored person; a read/write item 241 is placed on the desktop 240.
The following describes an operation method of the second method for acquiring the reference reading/writing posture parameter with reference to fig. 3:
in fig. 3, the person to be monitored is in the reference reading/writing posture state, and the sensor 210 located at the first position acquires first distance data from the face 231 of the person to be monitored to the reader/writer 341 in the first direction 321; and/or the presence of a gas in the gas,
when the person to be monitored is in the reference reading and writing posture state, the inclination angle sensor 215 located at the second position acquires inclination angle data of the face 231/head/eye 230 of the person to be monitored;
a distance data from the face 231 of the person to be monitored in the reference reading and writing posture state to the reading/writing object 341; and monitoring at least one of inclination data of the face 231/head/eye 230 of the person as a reference reading and writing posture parameter.
In fig. 3, the ultrasonic sensor 210 and the tilt sensor 215 are worn on the head by a support, which may be a support supported by using an ear 233, or a head band-shaped support; the output signals of the ultrasonic sensor 210 and the tilt sensor 215 are sent to the main module 218 through wires, and the main module 218 is placed at the waist or chest 232 of the monitored person; the read/write object is located in the hand of the person being monitored.
The method of the present embodiment, wherein,
the step of determining the basic variation range of the reading and writing posture according to the preset basic variation of the reading and writing posture parameters by taking the reference reading and writing posture parameters as reference specifically comprises the following steps:
expanding the value range of the corresponding parameter in the reference reading and writing posture parameter by using at least one of the following variation contained in the preset basic variation of the reading and writing posture parameter:
approximating the variation amount using a predetermined face/eye/range sensor, and subtracting the variation amount from the face/eye/range sensor reference distance in the reference reading and writing posture to obtain a basic anteversion distance range of the face/eye/range sensor with respect to the position in the reference reading and writing posture;
using a preset face/eye/distance measuring sensor for backward bending variation, and adding the variation to the reference distance of the face/eye/distance measuring sensor in the reference reading and writing posture to obtain a basic backward bending range of the face/eye/distance measuring sensor relative to the position of the reference reading and writing posture;
adding a predetermined face/eye/head angle offset variation to a face/eye/head reference azimuth in the reference reading and writing posture, using the variation to obtain a basic offset angle range of the face/eye/head with respect to the reference azimuth;
one or more of the basic forward-leaning distance range, the basic backward-leaning range and the basic offset angle range form a basic variation range of the reading and writing posture;
wherein, the basic variation of the reading and writing posture parameters comprises one or more of the following parameters:
a basic forward tilt distance value, a basic backward tilt distance value, a basic left/right offset angle value of the face/eyes/head with respect to the position in the reference reading and writing posture.
The following steps for determining the basic variation range of the reading and writing posture will be further described with reference to fig. 2:
using a predetermined face 231/head/eye 230 approach variation PA, the length of the line segment PA representing the predetermined face 231/head/eye 230 approach variation, subtracting the variation PA from the reference face 231/head/eye 230 distance in the reference reading and writing posture to obtain a basic forward tilting distance of the face 231/head/eye 230 with respect to the reference position in the reference reading and writing posture, the range from point P to point a being the reading and writing posture variation range of the face 231/head/eye 230 with respect to point P in the reference reading and writing posture, the distance from point a to the reader/writer being the minimum value of the distances from the sensor 210 located at the first position to the reader/writer;
using a predetermined face 231/head/eye 230 pitch change amount PB, the length of the line segment PB indicates the predetermined face 231/head/eye 230 pitch change amount, the variation PB is added to the reference distance of the face 231/head/eye 230 in the reference reading/writing posture to obtain a basic backward range of the face 231/head/eye 230 with respect to the position (position of point P) of the face 231/head/eye 230 in the reference reading/writing posture, the length of the line segment PB is a basic backward range of the position (position of point P) of the face 231/head/eye 230 in the reference reading/writing posture, the distance of point B from the reading/writing object 241 is the maximum value of the distance from the ultrasonic sensor 210 to the reading/writing object 241, this distance is taken as the maximum value of the distance from the face 231/head/eye 230 to the reader/writer 241;
a predetermined amount of change in the left/right shift of the face 231/head/eye 230 is used, and in fig. 2, the amount of change is a change angle of the face 231/head/eye 230 with reference to a vertical reference direction in the drawing, so that the angle change range of the head on the left/right side is within a distance range indicated by a line segment GH.
In fig. 2, point C indicates an edge point that the back of the head can reach when the head does not change within the basic range of reading and writing postures.
The following describes the steps of determining the basic variation range of the reading and writing posture with reference to fig. 3:
using a predetermined face 231/head/eye 230 approach variation PA, the length of the line segment PA representing the predetermined face 231/head/eye 230 approach variation, subtracting the variation PA from the reference face 231/head/eye 230 distance in the reference reading and writing posture to obtain a basic forward tilting distance of the face 231/head/eye 230 with respect to the position in the reference reading and writing posture, the range from point P to point a being the reading and writing posture variation range of the face 231/head/eye 230 with respect to point P in the reference reading and writing posture, the distance from point a to the reader/writer 341 being the minimum value of the distances from the sensor 210 located at the first position to the reader/writer 341;
using a predetermined face 231/head/eye 230 pitch change amount PB, the length of the line segment PB indicates the predetermined face 231/head/eye 230 pitch change amount, the change PB is added to the reference distance of the face 231/head/eye 230 in the reference reading/writing posture to obtain a basic backward range of the face 231/head/eye 230 with respect to the position (position of point P) of the face 231/head/eye 230 in the reference reading/writing posture, the length of the line segment PB is a basic backward range of the position (position of point P) of the face 231/head/eye 230 in the reference reading/writing posture, the distance of point B from the reader/writer 241 is the maximum value of the distance from the ultrasonic sensor 210 to the reader/writer 341, the distance is taken as the maximum value of the distance from the face 231/head/eye 230 to the reader/writer 341;
a predetermined face 231/head/eye 230 left/right shift variation amount is used, which is a variation angle of the face 231/head/eye 230 in the vertical reference direction, see fig. 3, as a reference, such that the angle variation range of the head on the left/right is within the distance range indicated by the line segment GH in fig. 3.
In fig. 3, point C indicates an edge point that the back of the head can reach when the head does not change within the basic range of reading and writing postures.
The method provided by the embodiment further comprises a step of sending a prompt signal, and specifically comprises at least one of the following operations;
after the potential abnormal reading and writing posture is identified, a potential abnormal reading and writing posture prompt signal is sent out;
after the reading and writing posture change long time exceeding the basic range is recognized, a reading and writing posture correction prompt signal is sent out;
after recognizing that the change frequency of the reading and writing posture is short and exceeds a basic range, sending a reading and writing posture correction prompt signal; and
after a time interval is continuously monitored, the times of abnormal reading and writing postures in the time interval are given in a voice or digital mode;
the operation of sending out a potential abnormal reading and writing posture prompt signal and/or sending out a reading and writing posture correction prompt signal specifically comprises at least one of the following steps:
using any one of a loudspeaker, a wired earphone or a wireless earphone to send out sound and/or voice prompt signals;
sending out a light prompt signal;
and sending out a vibration prompt signal.
The step of using the vibration prompt includes:
using a micro vibrator placed at a head or a certain part of a body to prompt the abnormal reading and writing posture;
preferably, the micro-vibrator supported by the ear part is used for prompting abnormal reading and writing postures, and comprises: using a micro vibrator electrically connected with a wired earphone or a wireless earphone to prompt the abnormal reading and writing posture;
the method provided by this embodiment further includes a step of sending monitoring data and/or a step of receiving a basic variation of a predetermined reading/writing posture parameter, wherein,
the sending step of the monitoring data specifically comprises the following steps:
the step of acquiring the read-write posture monitoring data comprises the following steps of acquiring at least one of the following data:
a reference reading and writing posture parameter;
basic variation range parameters of the reading and writing postures;
reading and writing posture parameters;
the time point of occurrence of the reading and writing posture change beyond basic range event;
the time point and/or duration of the occurrence of the event in the ultra-basic range when the reading and writing posture changes;
the time point and/or duration of the occurrence of the short-time basic range event of the read-write posture change;
a point in time and/or duration of occurrence of a read-write gesture interrupt event;
a point in time and/or duration of occurrence of a pseudo read-write gesture event;
a monitoring data transmission step, comprising at least one of the following operations:
directly sending the read-write posture monitoring data to at least one of a mobile phone terminal, a computer and a removable memory through a wired or wireless interface; and
the read-write posture monitoring data is directly sent to a communication network through a wired or wireless interface and is sent to at least one of a server, a mobile phone terminal and a computer through the communication network;
the monitoring data sending unit acquires data from the reading and writing posture change beyond basic range recognition unit and the abnormal reading and writing posture recognition unit;
the step of receiving the basic variation of the preset reading and writing posture parameters comprises the following steps:
and receiving the preset basic variable quantity of the read-write gesture parameter from at least one of a mobile phone terminal, the Internet and a removable memory through a wired or wireless interface.
The method provided by this embodiment further includes a power consumption reduction monitoring step, which specifically includes:
after the reading and writing posture interruption state is identified, monitoring the duration time of the state, and increasing the time interval for acquiring the reading and writing posture parameters when the duration time is greater than the reading and writing posture interruption time threshold; after determining that the reading and writing posture is returned to the basic range, reducing the time interval for acquiring the reading and writing posture parameters.
The method provided by the embodiment further comprises one or more of the following methods:
the walking posture prompting method specifically comprises the following steps:
the walking state identification specifically comprises the following steps: using the angle/acceleration change frequency of the tilt sensor positioned at the second position of the head to identify the walking state, and judging that the sensor is in the walking state when the angle change frequency of the sensor exceeds a preset angle/acceleration change frequency threshold; and/or, using the acceleration or angle change of the sensor positioned on the third position of the body or the head to identify the walking state, and judging that the walking state is in the walking state when the acceleration of the sensor positioned on the third position exceeds a preset acceleration change frequency threshold or when the angle of the sensor positioned on the third position is changed to a preset range;
and identifying the walking gesture, which specifically comprises the following steps: acquiring the inclination angle of the face/head by using the inclination angle sensor at the second position, wherein the inclination angle is an angle value relative to the horizontal direction and/or the vertical direction, and when the inclination angle is larger than a preset inclination angle threshold, prompting the walking posture and/or recording abnormal data of the walking posture;
the angle/acceleration change frequency refers to the reciprocating change frequency of an angle or acceleration in unit time, the angle or acceleration sensed by an angle or acceleration sensor worn on the second position of the head of a person during walking can change along with the swing of the human body repeatedly, and the threshold value range of the angle/acceleration change frequency is 30-120 times per minute; the acceleration of the sensor at the third position exceeds a preset acceleration change frequency threshold, and the threshold value is between 30 and 120 times per minute; the angle of the sensor at the third position is changed to be within a preset range, namely the angle of the third sensor placed at the thigh part indicates that the thigh is in an upright state, and the thigh is vertical or nearly vertical to the ground in the upright state;
the preset inclination angle threshold is an offset angle threshold of the normal direction of the top of the head relative to a vertical line (a vertical reference direction, see fig. 2) of the body in an upright state, and the threshold value range is between 5 and 30 degrees.
A target blind detection method is used for a child game and specifically comprises the following steps:
sending ultrasonic waves to a first direction by using a ranging sensor positioned at the first position, and sending a target existence prompt after receiving an echo; and/or calculating the distance of the target generating the echo after receiving the echo, and sending out a target existence prompt and a distance indication;
the target presence prompt is implemented in any one of sound, voice and vibration;
the distance indication is realized in a voice mode;
one example of such child play is catch-and-hide, where the child detects the direction or position of a game partner by sound waves without using the eyes to observe.
A height measuring method is used for measuring the height of a child, and specifically comprises the following steps:
placing the transmitting/receiving surface of the ranging sensor at the same height as the top of the head of a standing child;
sending an ultrasonic signal to a standing plane of the child using the ranging sensor;
measuring the round trip time of the ultrasonic wave, and calculating the height of the child by using the round trip time and the propagation speed of the ultrasonic wave;
outputting the height of the child in a voice or digital mode; and/or recording the measurement time and the height of the child.
Example II, a device for monitoring reading and writing postures
Referring to fig. 4, an example of a reading/writing posture monitoring apparatus provided in an embodiment of the present invention includes:
a reference reading and writing posture parameter obtaining unit 420, a reading and writing posture basic change range determining unit 430, a reading and writing posture change beyond basic range recognizing unit 440, an abnormal reading and writing posture recognizing unit 450 and a sensor unit 410; wherein,
the reference reading/writing posture parameter obtaining unit 420 is configured to obtain at least one of the following parameters:
a predetermined reference distance value from the eye/ranging sensor to the reading and writing object;
the distance data from the distance measuring sensor at the first position to the read-write object in a specific direction; and
the inclination angle sensor at the second position acquires a reference azimuth angle of the face/head, wherein the reference azimuth angle is an angle value relative to a specific reference direction;
the reference reading and writing posture parameter obtaining unit 420 sends the distance data and/or the reference azimuth angle data to the reading and writing posture basic variation range determining unit 430;
the reading/writing posture basic variation range determining unit 430 is configured to determine, with the reference reading/writing posture parameter obtained from the reference reading/writing posture parameter obtaining unit as a reference, a basic variation range of the reading/writing posture according to a pre-stored predetermined reading/writing posture parameter basic variation, and specifically includes determining at least one of the following parameter values:
a minimum value of distance data of the ranging sensor at the first position to the reader/writer in the first direction;
a maximum value of distance data of the ranging sensor at the first position to the reader/writer in the first direction; and
range of angular value variation of the face/head with respect to the reference azimuth;
the reading and writing posture change beyond basic range recognition unit 440 is configured to recognize whether the reading and writing posture change exceeds the basic range, and the executed recognition method includes: acquiring a reading and writing posture parameter, comparing the reading and writing posture parameter with the reference reading and writing posture parameter to obtain a reading and writing posture parameter variation, judging the reading and writing posture state to be in a state beyond a basic range if the reading and writing posture parameter variation exceeds a preset reading and writing posture parameter basic variation, and otherwise, judging the reading and writing posture state to be in a state within the basic range; the unit obtains the basic change range of the reading and writing posture from the basic change range determining unit 430, obtains the current reading and writing posture parameters from the sensor unit 410, and sends the recognition result to the abnormal reading and writing posture recognition unit 450 after completing the recognition of the reading and writing posture change beyond the basic range;
the abnormal reading and writing gesture recognition unit 450 is configured to perform at least one of the following recognition operations:
potential abnormal read-write gesture recognition, comprising: after the state that the read-write posture changes beyond the basic range is identified, the state is taken as a potential abnormal read-write posture state;
the long-time ultra-basic range identification of the read-write posture change comprises the following steps: after the state that the read-write posture changes beyond the basic range is identified, the duration time of the state is further judged, if the duration time exceeds a preset time threshold beyond the basic range, the state is judged to be an abnormal read-write posture state, and if not, the state is judged to be a short-time occasional state;
the short-time ultra-basic range identification of frequent read-write posture change comprises the following steps: after recognizing that the read-write posture changes beyond the basic range state and judging the state as a short-time occasional state, further judging whether the short-time occasional state appears in a time interval before the state occurs, if not, judging the state as the short-time occasional state, and if so, judging the state as an abnormal read-write posture state;
read-write gesture interrupt recognition comprising: after the state that the change of the reading and writing posture exceeds the basic range is identified, and after the distance between the reading and writing posture and the sensor exceeds a preset interrupt distance threshold, the state is judged as the read and writing posture interrupt state; and the number of the first and second groups,
pseudo read-write gesture recognition, comprising: after two or more than two states in the basic range are continuously identified in the time interval II, corresponding reading and writing posture parameters of the states in the basic range appearing at different time points are compared, if the difference value between the corresponding reading and writing posture parameters is smaller than a preset reading and writing posture natural change threshold, the state in the basic range is judged to be a pseudo reading and writing posture state, otherwise, the state is judged to be a normal reading and writing posture state;
the abnormal reading and writing posture identification unit acquires the identification result from the reading and writing posture change over basic range identification unit and acquires the current reading and writing posture parameter from the sensor unit;
the abnormal reading and writing posture identifying unit 450 obtains the identification result from the reading and writing posture change beyond basic range identifying unit 440, and obtains the current reading and writing posture parameters from the sensor unit 410;
the sensor unit 410 is used for acquiring distance information and/or angle information, and includes an ultrasonic sensing unit and/or a tilt sensing unit.
In the apparatus provided in this embodiment, the functions of the units may be implemented by using respective software and hardware modules, or may be implemented by sharing a software module and/or a hardware module among at least some of the units.
The apparatus of this embodiment further includes a prompt signal sending unit 460, configured to send at least one of the following signals:
after the potential abnormal reading and writing posture is identified, a potential abnormal reading and writing posture prompt signal is sent out;
after the reading and writing posture change long time exceeding the basic range is recognized, a reading and writing posture correction prompt signal is sent out;
after recognizing that the change frequency of the reading and writing posture is short and exceeds a basic range, sending a reading and writing posture correction prompt signal; and
after a time interval is continuously monitored, the times of abnormal reading and writing postures in the time interval are given in a voice or digital mode;
the sending of the potential abnormal reading and writing posture prompt signal and/or the sending of the reading and writing posture correction prompt signal specifically includes at least one of the following implementation methods:
using any one of a loudspeaker, a wired earphone or a wireless earphone to send out sound and/or voice prompt signals;
sending out a light prompt signal;
sending out a vibration prompt signal;
the prompt signal sending unit acquires the identification result information from the abnormal reading and writing posture identification unit or is triggered to work by the identification result of the abnormal reading and writing posture identification unit.
The apparatus of this embodiment further includes a monitoring data transmitting unit 470 and/or a predetermined reading and writing posture parameter basic variation receiving unit 480, wherein,
the monitoring data sending unit is used for realizing the following operations:
the step of acquiring the read-write posture monitoring data specifically comprises the following steps of:
a reference reading and writing posture parameter;
basic variation range parameters of the reading and writing postures;
reading and writing posture parameters;
the time point of occurrence of the reading and writing posture change beyond basic range event;
the time point and/or duration of the occurrence of the event in the ultra-basic range when the reading and writing posture changes;
the time point and/or duration of the occurrence of the short-time basic range event of the read-write posture change;
a time point and/or duration of occurrence of a read-write gesture disappearance event;
a point in time and/or duration of occurrence of a pseudo read-write gesture event;
the monitoring data sending step specifically comprises at least one of the following operations:
directly sending the read-write posture monitoring data to at least one of a mobile phone terminal, a computer and a removable memory through a wired or wireless interface; and
the read-write posture monitoring data is directly sent to a communication network through a wired or wireless interface and is sent to at least one of a server, a mobile phone terminal and a computer through the communication network;
the monitoring data sending unit acquires data from the reading and writing posture change beyond basic range recognition unit and the abnormal reading and writing posture recognition unit;
the predetermined reading and writing posture parameter basic variation receiving unit 480 is configured to receive the predetermined reading and writing posture parameter basic variation and transmit data to the reading and writing posture basic variation range determining unit, and includes:
and the wired or wireless interface is used for receiving the basic variable quantity of the preset reading and writing posture parameters from at least one of a mobile phone terminal, the Internet and a removable memory.
In the device of the present embodiment, referring to fig. 2, the ultrasonic sensor 210 and the tilt sensor 215 are worn on the head by a support, which may be a support supported by an ear 233 or a head band-shaped support; the output signals of the ultrasonic sensor 210 and the tilt sensor 215 are sent to the main module 218 through wires, and the main module 218 is placed at the waist or chest 232 of the monitored person; a read/write item 241 is placed on the desktop 240. The ultrasonic sensor 210 and tilt sensor 215 may also be placed on a head-mounted stand that has a similar support to the eyeglass frame, for example, a stand in the form of google glass.
The reading and writing posture monitoring method and the device provided by the embodiment of the invention have the advantages that at least one of the defects of high misjudgment rate, incapability of identifying false reading and writing postures, incapability of being used for reading and writing posture evaluation afterwards and lack of energy-saving measures in the conventional reading and writing posture monitoring technology is overcome.
The reading and writing posture monitoring method and the device provided by the embodiment of the invention are exemplified by following the natural movement rule in the reading and writing posture, have high identification accuracy, can be used for both instant prompt of the reading and writing posture and evaluation after the reading and writing posture monitoring, and have practicability.
The reading and writing posture monitoring method and the device provided by the embodiment of the invention can be wholly or partially realized by using an electronic technology and an ultrasonic technology; the reading and writing posture monitoring method provided by the embodiment of the invention can be wholly or partially realized through software instructions and/or hardware circuits; the module or unit included in the reading and writing posture monitoring device provided by the embodiment of the invention can be realized by adopting electronic components and ultrasonic devices.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Claims (10)
1. A reading and writing posture monitoring method comprises the following steps:
obtaining a reference reading and writing posture parameter, wherein the reference reading and writing posture parameter comprises at least one of the following parameters:
a predetermined reference distance value from the eye/ranging sensor to the reading and writing object;
the distance data from the distance measuring sensor at the first position to the read-write object in a specific direction; and
the inclination angle sensor at the second position acquires a reference azimuth angle of the face/head, wherein the reference azimuth angle is an angle value relative to a specific reference direction;
determining a basic variation range of the reading and writing posture, comprising: determining a basic variation range of the reading and writing posture according to a preset basic variation of the reading and writing posture parameters by taking the reference reading and writing posture parameters as reference, and specifically determining at least one parameter value as follows:
a minimum value of distance data of the ranging sensor at the first position to the reader/writer in the first direction;
a maximum value of distance data of the ranging sensor at the first position to the reader/writer in the first direction; and
range of angular value variation of the face/head with respect to the reference azimuth;
the reading and writing posture change beyond basic range recognition comprises the following steps: acquiring a reading and writing posture parameter, comparing the reading and writing posture parameter with the reference reading and writing posture parameter to obtain a reading and writing posture parameter variation, judging the reading and writing posture state to be in a state beyond a basic range if the reading and writing posture parameter variation exceeds a preset reading and writing posture parameter basic variation, and otherwise, judging the reading and writing posture state to be in a state within the basic range;
abnormal reading and writing gesture recognition, which comprises at least one recognition operation of the following steps:
potential abnormal read-write gesture recognition, comprising: after the state that the read-write posture changes beyond the basic range is identified, the state is taken as a potential abnormal read-write posture state;
the long-time ultra-basic range identification of the read-write posture change comprises the following steps: after the state that the read-write posture changes beyond the basic range is identified, the duration time of the state is further judged, if the duration time exceeds a preset time threshold beyond the basic range, the state is judged to be an abnormal read-write posture state, and if not, the state is judged to be a short-time occasional state;
the short-time ultra-basic range identification of frequent read-write posture change comprises the following steps: after recognizing that the read-write posture changes beyond the basic range state and judging the state as a short-time occasional state, further judging whether the short-time occasional state appears in a time interval before the state occurs, if not, judging the state as the short-time occasional state, and if so, judging the state as an abnormal read-write posture state;
read-write gesture interrupt recognition comprising: after the state that the read-write posture changes beyond the basic range is identified, and the distance between the distance measuring sensor and the read-write object exceeds a preset interrupt distance threshold, the read-write posture is judged to be in an interrupt state; and the number of the first and second groups,
pseudo read-write gesture recognition, comprising: and after two or more than two states in the basic range are continuously identified in the time interval II, comparing corresponding reading and writing posture parameters of the states in the basic range appearing at different time points, if the difference value between the corresponding reading and writing posture parameters is smaller than a preset reading and writing posture natural change threshold, judging the state in the basic range as a pseudo reading and writing posture state, otherwise, judging the state as a normal reading and writing posture state.
2. The method of claim 1, wherein,
the step of obtaining the reference reading and writing posture parameter specifically includes at least one of the following:
reading a reference distance value from a predetermined eye/ranging sensor to a reading and writing object from a storage unit;
when a person to be monitored is in a reference reading and writing posture state, a distance measuring sensor positioned at a first position of the head of the person to be monitored is used for acquiring distance data from the sensor to a reading/writing object; and
when a person to be monitored is in a reference reading and writing posture state, acquiring a reference azimuth angle of the face/head by using an inclination angle sensor positioned at a second position of the head of the person to be monitored, wherein the reference azimuth angle is an angle value relative to a specific reference direction;
the step of obtaining the reading and writing posture parameters is used for obtaining the current reading and writing posture parameters of the monitored person, and specifically comprises at least one of the following steps:
acquiring distance data from a sensor to a current read/write object by using the sensor positioned at a first position of the head of the monitored person; and acquiring a current azimuth angle of the face/head using a sensor located at a second position of the head of the monitored person, the current azimuth angle being an angular value with respect to the specific reference direction;
wherein, the range finding sensor is ultrasonic sensor.
3. The method of claim 1, wherein,
the step of determining the basic variation range of the reading and writing posture according to the preset basic variation of the reading and writing posture parameters by taking the reference reading and writing posture parameters as reference specifically comprises the following steps:
expanding the value range of the corresponding parameter in the reference reading and writing posture parameter by using at least one of the following variation contained in the preset basic variation of the reading and writing posture parameter:
approximating the variation amount using a predetermined face/eye/range sensor, and subtracting the variation amount from the face/eye/range sensor reference distance in the reference reading and writing posture to obtain a basic anteversion distance range of the face/eye/range sensor with respect to the position in the reference reading and writing posture;
using a preset face/eye/distance measuring sensor for backward bending variation, and adding the variation to the reference distance of the face/eye/distance measuring sensor in the reference reading and writing posture to obtain a basic backward bending range of the face/eye/distance measuring sensor relative to the position of the reference reading and writing posture;
adding a predetermined face/eye/head angle offset variation to a face/eye/head reference azimuth in the reference reading and writing posture, using the variation to obtain a basic offset angle range of the face/eye/head with respect to the reference azimuth;
one or more of the basic forward-leaning distance range, the basic backward-leaning range and the basic offset angle range form a basic variation range of the reading and writing posture;
wherein, the basic variation of the reading and writing posture parameters comprises one or more of the following parameters:
a basic forward tilt distance value, a basic backward tilt distance value, a basic left/right offset angle value of the face/eyes/head with respect to the position in the reference reading and writing posture.
4. The method of claim 1, further comprising a step of sending a prompt signal, specifically including at least one of the following operations;
after the potential abnormal reading and writing posture is identified, a potential abnormal reading and writing posture prompt signal is sent out;
after the reading and writing posture change long time exceeding the basic range is recognized, a reading and writing posture correction prompt signal is sent out;
after recognizing that the change frequency of the reading and writing posture is short and exceeds a basic range, sending a reading and writing posture correction prompt signal; and
after a time interval is continuously monitored, the times of abnormal reading and writing postures in the time interval are given in a voice or digital mode;
the operation of sending out a potential abnormal reading and writing posture prompt signal and/or sending out a reading and writing posture correction prompt signal specifically comprises at least one of the following steps:
using any one of a loudspeaker, a wired earphone or a wireless earphone to send out sound and/or voice prompt signals;
sending out a light prompt signal;
and sending out a vibration prompt signal.
5. The method according to claim 1, further comprising a step of sending monitoring data and/or a step of receiving a predetermined reading and writing posture parameter basic variation, wherein,
the sending step of the monitoring data specifically comprises the following steps:
the step of acquiring the read-write posture monitoring data comprises the following steps of acquiring at least one of the following data:
a reference reading and writing posture parameter;
basic variation range parameters of the reading and writing postures;
reading and writing posture parameters;
the time point of occurrence of the reading and writing posture change beyond basic range event;
the time point and/or duration of the occurrence of the event in the ultra-basic range when the reading and writing posture changes;
the time point and/or duration of the occurrence of the short-time basic range event of the read-write posture change;
a point in time and/or duration of occurrence of a read-write gesture interrupt event;
a point in time and/or duration of occurrence of a pseudo read-write gesture event;
a monitoring data transmission step, comprising at least one of the following operations:
directly sending the read-write posture monitoring data to at least one of a mobile phone terminal, a computer and a removable memory through a wired or wireless interface; and
the read-write posture monitoring data is directly sent to a communication network through a wired or wireless interface and is sent to at least one of a server, a mobile phone terminal and a computer through the communication network;
the step of receiving the basic variation of the preset reading and writing posture parameters comprises the following steps:
and receiving the preset basic variable quantity of the read-write gesture parameter from at least one of a mobile phone terminal, the Internet and a removable memory through a wired or wireless interface.
6. The method of claim 1, further comprising a power consumption reduction monitoring step, specifically comprising:
after the reading and writing posture interruption state is identified, monitoring the duration time of the state, and increasing the time interval for acquiring the reading and writing posture parameters when the duration time is greater than the reading and writing posture interruption time threshold; after determining that the reading and writing posture is returned to the basic range, reducing the time interval for acquiring the reading and writing posture parameters.
7. The method of claim 1, further comprising one or more of:
the walking posture prompting method specifically comprises the following steps:
the walking state identification specifically comprises the following steps: using the angle/acceleration change frequency of the tilt sensor positioned at the second position of the head to identify the walking state, and judging that the sensor is in the walking state when the angle change frequency of the sensor exceeds a preset angle/acceleration change frequency threshold; and/or, using the acceleration or angle change of the sensor positioned on the third position of the body or the head to identify the walking state, and judging that the walking state is in the walking state when the acceleration of the sensor positioned on the third position exceeds a preset acceleration change frequency threshold or when the angle of the sensor positioned on the third position is changed to a preset range;
and identifying the walking gesture, which specifically comprises the following steps: acquiring the inclination angle of the face/head by using the inclination angle sensor at the second position, wherein the inclination angle is an angle value relative to the horizontal direction and/or the vertical direction, and when the inclination angle is larger than a preset inclination angle threshold, prompting the walking posture and/or recording abnormal data of the walking posture;
a target blind detection method is used for a child game and specifically comprises the following steps:
sending ultrasonic waves to a first direction by using a ranging sensor positioned at the first position, and sending a target existence prompt after receiving an echo; and/or calculating the distance of the target generating the echo after receiving the echo, and sending out a target existence prompt and a distance indication;
the target presence prompt is implemented in any one of sound, voice and vibration;
the distance indication is realized in a voice mode;
a height measuring method is used for measuring the height of a child, and specifically comprises the following steps:
placing the transmitting/receiving surface of the ranging sensor at the same height as the top of the head of a standing child;
sending an ultrasonic signal to a standing plane of the child using the ranging sensor;
measuring the round trip time of the ultrasonic wave, and calculating the height of the child by using the round trip time and the propagation speed of the ultrasonic wave;
outputting the height of the child in a voice or digital mode; and/or recording the measurement time and the height of the child.
8. A reading and writing posture monitoring device, comprising:
a reference reading and writing posture parameter obtaining unit, a reading and writing posture basic change range determining unit, a reading and writing posture change beyond basic range identifying unit, an abnormal reading and writing posture identifying unit and a sensor unit; wherein,
the reference reading and writing posture parameter acquiring unit is used for acquiring at least one of the following parameters:
a predetermined reference distance value from the eye/ranging sensor to the reading and writing object;
the distance data from the distance measuring sensor at the first position to the read-write object in a specific direction; and
the inclination angle sensor at the second position acquires a reference azimuth angle of the face/head, wherein the reference azimuth angle is an angle value relative to a specific reference direction;
the reference reading and writing posture parameter acquisition unit sends the distance data and/or the reference azimuth angle data to the reading and writing posture basic change range determination unit;
the reading and writing posture basic variation range determining unit is used for determining the basic variation range of the reading and writing posture according to the pre-stored preset reading and writing posture parameter basic variation by taking the reference reading and writing posture parameter acquired by the reference reading and writing posture parameter acquiring unit as a reference, and specifically comprises the following at least one parameter value:
a minimum value of distance data of the ranging sensor at the first position to the reader/writer in the first direction;
a maximum value of distance data of the ranging sensor at the first position to the reader/writer in the first direction; and
range of angular value variation of the face/head with respect to the reference azimuth;
the reading and writing posture change beyond basic range identification unit is used for identifying whether the reading and writing posture change exceeds the basic range, and the executed identification method comprises the following steps: acquiring a reading and writing posture parameter, comparing the reading and writing posture parameter with the reference reading and writing posture parameter to obtain a reading and writing posture parameter variation, judging the reading and writing posture state to be in a state beyond a basic range if the reading and writing posture parameter variation exceeds a preset reading and writing posture parameter basic variation, and otherwise, judging the reading and writing posture state to be in a state within the basic range;
the abnormal reading and writing gesture recognition unit is used for executing at least one recognition operation of the following operations:
potential abnormal read-write gesture recognition, comprising: after the state that the read-write posture changes beyond the basic range is identified, the state is taken as a potential abnormal read-write posture state;
the long-time ultra-basic range identification of the read-write posture change comprises the following steps: after the state that the read-write posture changes beyond the basic range is identified, the duration time of the state is further judged, if the duration time exceeds a preset time threshold beyond the basic range, the state is judged to be an abnormal read-write posture state, and if not, the state is judged to be a short-time occasional state;
the short-time ultra-basic range identification of frequent read-write posture change comprises the following steps: after recognizing that the read-write posture changes beyond the basic range state and judging the state as a short-time occasional state, further judging whether the short-time occasional state appears in a time interval before the state occurs, if not, judging the state as the short-time occasional state, and if so, judging the state as an abnormal read-write posture state;
read-write gesture interrupt recognition comprising: after the state that the change of the reading and writing posture exceeds the basic range is identified, and after the distance between the reading and writing posture and the sensor exceeds a preset interrupt distance threshold, the state is judged as the read and writing posture interrupt state; and the number of the first and second groups,
pseudo read-write gesture recognition, comprising: after two or more than two states in the basic range are continuously identified in the time interval II, corresponding reading and writing posture parameters of the states in the basic range appearing at different time points are compared, if the difference value between the corresponding reading and writing posture parameters is smaller than a preset reading and writing posture natural change threshold, the state in the basic range is judged to be a pseudo reading and writing posture state, otherwise, the state is judged to be a normal reading and writing posture state;
the abnormal reading and writing posture identification unit acquires the identification result from the reading and writing posture change over basic range identification unit and acquires the current reading and writing posture parameter from the sensor unit;
the sensor unit is used for acquiring distance information and/or angle information and comprises an ultrasonic sensing unit and/or an inclination angle sensing unit.
9. The apparatus of claim 8, further comprising a prompt signaling unit for signaling at least one of:
after the potential abnormal reading and writing posture is identified, a potential abnormal reading and writing posture prompt signal is sent out;
after the reading and writing posture change long time exceeding the basic range is recognized, a reading and writing posture correction prompt signal is sent out;
after recognizing that the change frequency of the reading and writing posture is short and exceeds a basic range, sending a reading and writing posture correction prompt signal; and
after a time interval is continuously monitored, the times of abnormal reading and writing postures in the time interval are given in a voice or digital mode;
the operation of sending out a potential abnormal reading and writing posture prompt signal and/or sending out a reading and writing posture correction prompt signal specifically comprises at least one of the following steps:
using any one of a loudspeaker, a wired earphone or a wireless earphone to send out sound and/or voice prompt signals;
sending out a light prompt signal;
sending out a vibration prompt signal;
the prompt signal sending unit acquires the identification result information from the abnormal reading and writing posture identification unit or is triggered to work by the identification result of the abnormal reading and writing posture identification unit.
10. The device according to claim 8, further comprising a monitoring data transmitting unit and/or a predetermined reading and writing posture parameter basic variation receiving unit, wherein,
the monitoring data sending unit is used for realizing the following operations:
the step of acquiring the read-write posture monitoring data comprises the following steps of acquiring at least one of the following data:
a reference reading and writing posture parameter;
basic variation range parameters of the reading and writing postures;
reading and writing posture parameters;
the time point of occurrence of the reading and writing posture change beyond basic range event;
the time point and/or duration of the occurrence of the event in the ultra-basic range when the reading and writing posture changes;
the time point and/or duration of the occurrence of the short-time basic range event of the read-write posture change;
a point in time and/or duration of occurrence of a read-write gesture interrupt event;
a point in time and/or duration of occurrence of a pseudo read-write gesture event;
a monitoring data transmission step, comprising at least one of the following operations:
directly sending the read-write posture monitoring data to at least one of a mobile phone terminal, a computer and a removable memory through a wired or wireless interface; and
the read-write posture monitoring data is directly sent to a communication network through a wired or wireless interface and is sent to at least one of a server, a mobile phone terminal and a computer through the communication network;
the monitoring data sending unit acquires data from the reading and writing posture change beyond basic range recognition unit and the abnormal reading and writing posture recognition unit;
the preset reading and writing posture parameter basic variation receiving unit is used for receiving the preset reading and writing posture parameter basic variation and transmitting data to the reading and writing posture basic variation range determining unit, and comprises:
and the wired or wireless interface is used for receiving the basic variable quantity of the preset reading and writing posture parameters from at least one of a mobile phone terminal, the Internet and a removable memory.
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