JP5049810B2 - Body motion detection device - Google Patents

Description

  The present invention relates to a body motion detection device.

  One of the body motion detection devices is a pedometer. The pedometer detects the acceleration in the vertical direction of the pedestrian using an acceleration sensor, and counts the number of steps (body movement) based on the change in the detected value. In the case of such a pedometer, a change in acceleration caused by vibrations when operating the pedometer or vibrations when attaching or detaching the pedometer is erroneously determined as a change in acceleration due to walking, In the display device, an error may occur in the counted number of steps. In order to avoid this, walking is detected when a change in acceleration that is regarded as walking continuously is detected for a predetermined determination period, or when a change in acceleration that is regarded as walking is detected for a predetermined number of times. Pedometers that are determined to be present are known.

  For example, when a predetermined number of signals from the walking sensor do not continue, it is determined that the walking is stopped, and within a predetermined time immediately after determining that the walking is stopped, the presence or absence of the start of walking is determined using the first reference value, and the predetermined time After the lapse, a pedometer is known that uses the second reference value to determine the presence or absence of walking (see, for example, Patent Document 1). In addition, each signal determined to be within the first reference cycle range among the walking signals is counted as one step, and among the signals outside the first reference cycle range, the signals within the second reference cycle range A pedometer is known in which a predetermined number of signals are counted as a predetermined number of steps when it is determined that a predetermined number of signals has continued (see, for example, Patent Document 2).

JP 2005-283340 A JP 2005-309692 A

  However, in the conventional pedometer described above, when the pedometer is carried in the pocket of the pants, when the pedometer is moved from the sitting position to the standing position, or vice versa, the pedometer is taken out of the pocket and the pedometer is displayed. When checking or switching the display, the pedometer's posture changes or vibrations due to the display switching operation are detected, but the posture changes or vibration due to the display switching operation are erroneously counted as steps. become.

  In particular, when the subject continues walking and takes a pedometer out of a pocket, etc., and confirms the step display, or while the subject continues walking, the pedometer is taken out of the pocket, etc. When the operation to check or switch operation is performed, the vibration caused by shaking or the vibration caused by the operation while checking the number of steps is counted as the number of steps because the vibration due to the operation continues to the vibration due to walking. There was a problem that the measurement accuracy of was poor. Thus, conventionally, even if the posture changes, if the noise based on the operation has continuity, it is counted as the number of steps.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a body motion detection device that can perform more accurate step count measurement in order to eliminate the above-described problems caused by the prior art.

In order to solve the above-described problems and achieve the object, the body movement detection device according to the present invention has a period of continuous walking determination for determining the continuation of body movement (hereinafter referred to as “continuous walking determination period”) , In the body motion detection device that counts the body motion determined to be continuous as the number of steps, the continuous walking determination period is started based on a change in posture of the body motion detection device.

Further, in the above-described invention, the body motion detecting device according to the present invention stops the step count display based on the posture change, counts the body motion during the continuous walking determination period, and continues walking by the continuous walking determination. When it is determined that the body movement counted during the continuous walking determination period is added to the stopped count display, the count display is updated.

Further, the body motion detection device according to the present invention is characterized in that, in the above invention, when a change in posture is detected during the continuous walking determination period, the body motion counting counted during the continuous walking determination period is cleared. To do.

The body motion detection device according to the present invention is the above invention, wherein the body motion detection device has an acceleration sensor, and the posture change is a change in gravitational acceleration obtained from an acceleration value detected by the acceleration sensor. It is detected by.

In the body motion detection device according to the present invention, in the above invention, the change in the gravitational acceleration is a change in posture when the gravitational acceleration changes by a predetermined value or more with reference to the gravitational acceleration when the previous posture change is detected. Is detected.

In the body motion detection device according to the present invention as set forth in the invention described above , the acceleration sensor detects acceleration in three orthogonal axes, and the gravitational acceleration in at least one of the three orthogonal axes is detected. It is characterized in that posture change is detected by the change.

  According to the body motion detection device of the present invention, it is possible to accurately count the number of steps by taking a continuous determination in consideration of a change in posture, even when there is a change in posture, even if vibration other than walking continues. There is an effect that a body motion detecting device capable of performing the above is obtained.

  Exemplary embodiments of a body motion detection device according to the present invention will be explained below in detail with reference to the accompanying drawings.

(Hardware configuration of body motion detection device)
FIG. 1 is a block diagram showing a hardware configuration of a body motion detection device according to the present invention. As shown in FIG. 1, the body motion detection device 11 includes a three-axis acceleration sensor that can detect accelerations in three different directions (X-axis direction, Y-axis direction, and Z-axis direction). Here, the three-axis acceleration sensor includes an X-axis acceleration sensor 12 that detects acceleration in the X-axis direction, a Y-axis acceleration sensor 13 that detects acceleration in the Y-axis direction, and a Z-axis acceleration sensor that detects acceleration in the Z-axis direction. It is shown as 14. A well-known sensor can be used as the acceleration sensor. The X-axis direction, the Y-axis direction, and the Z-axis direction are directions specific to the body motion detection device 11 and change with changes in the posture (direction and inclination) of the body motion detection device 11.

  Further, the body motion detection device 11 determines whether or not the subject motion is the body motion of the subject carrying the body motion detection device 11 based on the output signal of the three-axis acceleration sensor, and the processing device 15 that counts the body motion is provided. I have. The detailed configuration of the processing device 15 will be described later. The body motion detection device 11 includes a display device 16 that displays the body motion counted by the processing device 15. The display device 16 includes, for example, a liquid crystal panel and a liquid crystal drive circuit.

(Functional configuration of processing equipment)
FIG. 2 is a block diagram showing a functional configuration of the processing device of the body movement detection device according to the present invention. As shown in FIG. 2, the processing device 15 includes an X-axis analog / digital conversion unit 21, a Y-axis analog / digital conversion unit 22, a Z-axis analog / digital conversion unit 23, an acceleration acquisition unit 24, and a cosine peak value detection unit 25. , Lower chord peak value detection unit 26, peak difference detection unit 27, threshold determination unit 28
, A flag control unit 29, a display counting unit 30, a switching unit 41, an internal counting unit 42, a count updating unit 43, and an attitude change detecting unit 44. These functional units may be realized by hardware, or may be realized by executing a program with a CPU or the like.

  The X-axis analog / digital conversion unit 21, the Y-axis analog / digital conversion unit 22, and the Z-axis analog / digital conversion unit 23 are respectively connected to the X-axis acceleration sensor 12 and the Y-axis acceleration sensor via input terminals 31, 32, and 33. 13 and the Z-axis acceleration sensor 14, and analog voltage signals output from these sensors are sampled at a predetermined cycle and converted into digital data. It is desirable that the X-axis analog / digital conversion unit 21, the Y-axis analog / digital conversion unit 22, and the Z-axis analog / digital conversion unit 23 sample each sensor output signal at the same timing.

  The acceleration acquisition unit 24 acquires the magnitude of acceleration excluding the influence of gravitational acceleration based on the output values of the analog / digital conversion units 21, 22, and 23 for each axis. The magnitude of the acceleration is repeatedly increased and decreased as shown in FIG. FIG. 3 is a waveform diagram showing changes in acceleration acquired by the acceleration acquisition unit. In FIG. 3, acceleration data obtained by synthesizing the acceleration in the X-axis direction, the acceleration in the Y-axis direction, and the acceleration in the Z-axis direction is shown as a waveform. Instead, it is discrete data sampled at a predetermined period.

  The upper string peak value detection unit 25 detects a peak value (referred to as an upper string peak value) when the magnitude of the acceleration acquired by the acceleration acquisition unit 24 switches from an increasing tendency to a decreasing tendency. In the acceleration waveform shown in FIG. 3, peaks indicated by reference numerals 62, 64, 66, 68, 70, 72, and 74 are first-crest peak values. In order to detect the upper string peak value, the upper string peak value detection unit 25 performs, for example, the following processing.

  The crest peak value detection unit 25 stores the acceleration value output from the acceleration acquisition unit 24 in a buffer, compares the stored value of the buffer with the acceleration value output from the acceleration acquisition unit 24, and Update the stored value of the buffer with the larger value. When the acceleration value output from the acceleration acquisition unit 24 becomes smaller than the stored value of the buffer, the upper chord peak value detecting unit 25 sets the stored value of the buffer at that time as the upper chord peak value.

  The lower chord peak value detection unit 26 detects a peak value (referred to as a lower chord peak value) when the magnitude of the acceleration acquired by the acceleration acquisition unit 24 switches from a decreasing tendency to an increasing tendency. In the acceleration waveform shown in FIG. 3, the peaks indicated by reference numerals 61, 63, 65, 67, 69, 71 and 73 are the lower chord peak values. In order to detect the lower chord peak value, the lower chord peak value detecting unit 26 performs, for example, the following processing.

  The lower chord peak value detection unit 26 stores the acceleration value output from the acceleration acquisition unit 24 in a buffer, compares the stored value of the buffer with the acceleration value output from the acceleration acquisition unit 24, and Update the stored value of the buffer with the smaller value. When the acceleration value output from the acceleration acquisition unit 24 becomes larger than the stored value of the buffer, the lower chord peak value detecting unit 26 sets the stored value of the buffer at that time as the lower chord peak value.

  The peak difference detection unit 27 calculates the difference between the lower chord peak value detected by the lower chord peak value detection unit 26 and the upper chord peak value detected by the upper chord peak value detection unit 25. At that time, the peak difference detection unit 27 may calculate the difference between the lower chord peak value and the immediately following upper chord peak value, or may calculate the difference between the upper chord peak value and the immediately following lower chord peak value. . FIG. 3 shows an example in which the difference between the lower chord peak value and the immediately upper chord peak value is calculated. The threshold value determination unit 28 compares the difference between the lower chord peak value and the upper chord peak value calculated by the peak difference detection unit 27 with a preset threshold value, and determines whether body motion is detected based on the result. Determine. For example, the threshold determination unit 28 determines that body movement has been detected when the difference between the lower chord peak value and the upper chord peak value is greater than the threshold.

  When it is determined that the body motion is detected by the threshold determination unit 28, the flag control unit 29, for example, when the value of the acceleration data output from the acceleration acquisition unit 24 becomes zero for the first time, the body motion detection flag Turn on. This is because the vicinity of the upper chord peak value and the lower chord peak value is easily affected by noise or the like, so that the body motion detection flag is turned on while avoiding this. In FIG. 3, the triangle mark indicates the timing when the body motion detection flag is turned on, and the numbers below (1, 2, 3, 4, 5) indicate the number counted as body motion.

  Specifically, in the example shown in FIG. 3, the difference between the first lower chord peak 61 and the first upper chord peak 62, the difference between the third lower chord peak 65 and the third upper chord peak 66, and the fourth lower chord peak 67. And the fourth upper chord peak 68, the sixth lower chord peak 71 and the sixth upper chord peak 72, and the seventh lower chord peak 73 and the seventh upper chord peak 74 are larger than the threshold.

  Therefore, when the acceleration data value becomes zero for the first time after the first cosine peak 62, the third cosine peak 66, the fourth cosine peak 68, the sixth cosine peak 72, and the seventh cosine peak 74. Thus, the body motion detection flag is turned on. On the other hand, since the difference between the second lower chord peak 63 and the second upper chord peak 64 and the difference between the fifth lower chord peak 69 and the fifth upper chord peak 70 are smaller than the threshold value, the body motion detection flag remains off. . In addition, the flag control unit 29 switches the body motion detection flag off when a predetermined time elapses after the body motion detection flag is turned on.

  The display counting unit 30 includes a counter, and increments the count value every time a signal (assumed to be an on signal) indicating that the body motion detection flag is turned on is input from the switching unit 41. Data of the count value of the display counting unit 30 (referred to as display count value) is sent to the display device 16 via the output terminal 34.

  The internal counting unit 42 includes a counter, and increments the count value every time an ON signal is input from the switching unit 41. The internal counting unit 42 sends count value data to the counting update unit 43 in response to a count update instruction from the posture change detection unit 44. The internal counting unit 42 is reset to the initial value immediately after the body motion counting process is started or in response to an internal counting reset instruction from the posture change detection unit 44.

  The switching unit 41 switches whether or not the display counting unit 30 counts the number of times the body motion detection flag is turned on in response to a switching instruction from the posture change detection unit 44. The switching unit 41 is on the side where the display counting unit 30 does not count immediately after the body motion counting process of the body motion detecting device 11 is started, that is, in the initial state.

  While the switching unit 41 is on the side where the display counting unit 30 does not count, the display counting unit 30 is stopped. Therefore, in the following description, the state where the switching unit 41 is on the side where the display counting unit 30 does not count (switches) is expressed as the display counting stop side (switches), and is on the display counting stop side. Is expressed as a display counting stop state.

  The count updating unit 43 adds the count value data sent from the internal counting unit 42 to the display count value data. As a result, the number of body movements detected by the internal counting unit 42 while the switching unit 41 is on the display counting stop side but not counted by the display counting unit 30 is displayed as the display count value. Reflected.

(Posture change judgment)
4 and 5 are explanatory diagrams showing the contents of posture change determination in the posture change detection unit. The posture change is determined by a so-called “deemed gravitational acceleration” obtained by averaging the outputs of the respective acceleration sensors (X-axis acceleration sensor 12, Y-axis acceleration sensor 13, and Z-axis acceleration sensor 14).

  Specifically, first, acceleration sensor data is acquired at 16 Hz, and the acquired acceleration sensor data is averaged to 16 pieces every second, and this is regarded as gravitational acceleration. Then, when the difference from the previous gravitational acceleration value is greater than or equal to the threshold value, it can be considered that there has been a change in posture.

  The previous non-gravity acceleration is based on the non-gravity acceleration only when it is determined that the previous posture change has occurred. Then, regarding the assumed gravitational acceleration, threshold determination is performed for each of the X axis, the Y axis, and the Z axis, and if any one of them changes more than the threshold, it is assumed that there is a change in posture.

  In FIG. 4, it can be seen that the X-axis acceleration sensor 12 and the Z-axis acceleration sensor 14 have changed more than the determination threshold with reference to the assumed gravitational acceleration value in each acceleration sensor at the determination timing “2 (seconds)”. As indicated by a triangular mark, it is determined that there has been a change in posture at the determination timing “3 (seconds)” when a change greater than or equal to the threshold value has occurred. Then, the next posture change is determined based on the assumed gravitational acceleration value at the determination timing “3 (seconds)”.

  In FIG. 4, the change occurs at the determination timing “7 (seconds)”, but none of the X axis, the Y axis, and the Z axis is more than the threshold value. Therefore, it is not determined that the posture has changed at the determination timing “7 (seconds)” (the triangle mark is not displayed).

  Further, as shown in FIG. 5, even when there is a change at the determination timings “3 (seconds)” and “5 (seconds)”, only when there is a previous posture change on the X axis, gravitational acceleration is performed. It is determined that there has been a change in posture at a determination timing “5 (seconds)” at which a change greater than or equal to the threshold value has occurred from the value of the determination timing “2 (seconds)”. As described above, the reference of the non-gravity acceleration value only for the determination of the next posture change is preferably not the assumed gravitational acceleration value at the previous determination timing but the non-gravity acceleration only when there is a previous posture change.

(Processing procedure of posture change detector)
FIG. 6 and FIG. 7 are flowcharts showing a body motion counting process procedure of the body motion detection device according to the present invention. The posture change detection unit 44 clears (resets) only the continuous walking determination period when there is a posture change (pattern A), and when there is a posture change, the continuous walking determination period, and the internal count value. When both are cleared (reset), two patterns can be processed (pattern B).

  In the flowchart of FIG. 6 (pattern A), it is determined whether or not there is a change in posture (step S1). If there is a change in posture, a switching instruction signal is output to the switching unit 41 so as to switch to the internal counting unit 42 (step S2). Here, when the state has already been switched to the internal counting unit 42, the state switched to the internal counting unit 42 may be maintained as it is.

  Then, the continuous walking determination period is cleared (reset) (step S3), and the process proceeds to step S4. As a result, the count value of the display counting unit 30 is not counted up (incremented). In step S1, when there is no posture change (step S1: No), nothing is done and the process proceeds to step S4.

  Then, the continuous walking determination period is counted up (step S4), and then it is determined whether one step (body motion) is detected (step S5). Here, when one step has not been detected (step S5: No), it is determined whether or not there has been no detection for one second or more (step S6). Here, when there is no detection for 1 second or more (step S6: 1 second or more without detection), it is determined that walking has stopped (stopped), and an internal count reset instruction signal is output to the internal counting unit 42. Thus, the internal count value is cleared (reset) (step S7), the continuous walking determination period is cleared (reset) (step S8), and then the process returns to step S1. If 1 second has not elapsed in step S6 (S6: no detection is less than 1 second), nothing is done and the process returns to step S1.

  In step S5, when one step (body movement) is detected (step S5: Yes), it is determined that walking is continuing, and the internal count value of the internal counting unit 42 is counted up (incremented) (step S5). S9). Next, it is determined whether or not 6 seconds set as the predetermined time in the continuous walking determination period has elapsed (step S10). Here, when the continuous walking determination period is less than 6 seconds (step S10: No), the process returns to step S1.

  In step S10, when 6 seconds have elapsed (step S10: Yes), the count update instruction signal is output to the internal count unit 42 to display the internal count value in the count update unit 43. (Step S11). At the same time, an internal count reset instruction signal is output to the internal counting unit 42 to clear (reset) the internal count value of the internal counting unit 42 (step S12). Further, a switching instruction signal for switching to the display counting unit 30 is output to the switching unit 41 (step S13). Then, it returns to step S1.

  In the flowchart (pattern B) of FIG. 7, it is determined whether or not there has been a change in posture (step S20). If there is a change in posture, a switching instruction signal is output to the switching unit 41 so as to switch to the internal counting unit 42 (step S21). Then, the counter value of the internal counter of the internal counting unit 30 is cleared (reset) (step S22), the continuous walking determination period is cleared (reset) (step S23), and the process proceeds to step S24. As a result, the count value of the display counting unit 30 is not counted up (incremented).

  In step S20, when there is no posture change (step S20: No), nothing is done and the process proceeds to step S24. Steps S24 to S33 are the same as steps S4 to S13 in the flowchart shown in FIG.

(Concrete example)
Next, a specific example of use of the body motion detection device according to the present embodiment will be described. Specific Example 1 shows a case where the pedometer is taken out in order to stop from a continuous walk and check the number of steps. 8A to 8C are explanatory diagrams showing the display value and the contents of the internal count (value) in the specific example 1. FIG. 8A shows a conventional pedometer, and FIG. 2 shows the pattern A, and FIG. 8-3 shows the pattern B. FIGS. 8A to 8C illustrate an example in which the posture change occurs twice (triangular mark) when the pedometer is taken out.

  In the case of the conventional pedometer, there has been a problem that the vibration when the pedometer is taken out, the vibration caused by shaking of the hand while checking the number of steps taken out, and the vibration caused by the switch operation are counted as steps. In other words, in FIG. 8A, the display value is vibration due to walking until the display value is “62 (step)”, but the display value “63 (step)” is vibration at the time of taking out the pedometer, and thereafter. However, since it is stopped, the walking is not performed, and the vibration is counted and the display value is counted up (incremented) even though it is not vibration due to walking, and the counting accuracy of the number of steps is deteriorated. Further, the display value count-up is an erroneous count while the subject is confirming the display, and the subject is made to recognize that it is malfunctioning.

  Therefore, as shown in FIG. 8-2, when there is a posture change (triangular mark), for the next body movement, the counter value of the internal counter is increased without counting up the display value. While the display content is being confirmed, the display value remains at “63 (steps)”. In this way, continuous determination is started by the posture change when the pedometer is stopped and the pedometer is taken out, and the count-up of the display value is temporarily suppressed to prevent erroneous counting while the subject is confirming the display. be able to. The count value of the internal counter continues to be counted up even during continuous determination. However, if the signal does not continue for 6 seconds or longer, it is determined that it is not walking and the internal counter is cleared. The vibration after starting the continuous determination is not counted as walking, and the vibration caused by the operation of taking out the pedometer is not reflected in the display value.

  As shown in FIG. 8C, if the configuration is such that the count value of the internal counter is cleared (reset) every time there is a change in posture, continuous determination is started by the change in posture when the pedometer is stopped and stopped. At the same time, the count up of the display value is temporarily suppressed, and it is possible to prevent erroneous counting while the subject is checking the display, and furthermore, the count value of the internal counter is cleared each time the posture changes, so as it is Even when the vibration continues for 6 seconds or more, it is possible to suppress counting by signals other than walking.

  Specific example 2 shows a case where the pedometer is taken out during continuous walking, the number of steps is confirmed, and the pedometer is removed. 9A and 9B are explanatory diagrams showing the display value and the contents of the internal count (value) in the specific example 2. FIG. 9-1 shows a conventional pedometer, and FIG. 2 shows the pedometer of the second specific example. In FIGS. 9-1 and 9-2, the posture change is twice when the pedometer is taken out (the triangle mark indicating the first time: the pedometer is taken out, the triangle mark indicating the second time: the pedometer is lost) .) Shows an example when it occurs.

  In the case of a conventional pedometer, the vibration when taking out the pedometer, the vibration due to the shaking held in the hand while checking the number of steps, and the vibration due to the switch operation are counted as the number of steps, as in the first example. There was a problem. That is, in FIG. 9A, the display value is vibration due to walking until the display value is “62 (step)”, but the display value “63 (step)” is vibration when the pedometer is taken out, and thereafter. In addition to vibration caused by walking, vibrations that are not walking are counted as walking and the display value is counted up (incremented), resulting in poor step count counting accuracy. This count-up of the display value is an erroneous count while the subject is confirming the display, and causes the subject to recognize that it is malfunctioning.

  Therefore, as shown in FIG. 9-2, if the count value of the internal counter is cleared (reset) every time there is a change in posture, it is displayed by the posture change when the pedometer is taken out while walking is continued. The count-up of the value is temporarily suppressed, so that erroneous counting while the subject is confirming the display can be prevented. Not only is it visually appealing, but also the count value of the internal counter is cleared. When vibration continues for more than 2 seconds, it is possible to suppress counting by signals other than walking.

  As described above, according to the present embodiment, when a change in posture is detected by the posture change detection unit 44 during continuous detection of body movement, vibration continues after the change in posture is detected. Since it is determined whether it is walking or not, when the pedometer is taken out in order to confirm the number of steps after stopping from the continuous walking shown in the specific example 1, the number of steps is counted without counting the vibration that is not walking after the posture change as the number of steps. Accuracy can be improved. In addition, it is possible to prevent the number of steps displayed from being counted up corresponding to vibrations that are not walking.

  Further, according to the present embodiment, after the change in the posture is detected, the number of body movements detected during the continuous walking determination is counted, and the continuous walking determination is determined as continuous walking. Later, since the number of body movements counted during continuous walking determination is added to the number of steps that have been stopped for display, the pedometer is taken out during continuous walking to check the number of steps, and the pedometer is displayed. Since the vibration detected after the posture change is not walking is not counted, the vibration determined to be walking is counted as the number of steps, so that the accuracy of counting the number of steps can be improved. In addition, it is possible to prevent the number of steps displayed from being counted up corresponding to vibrations other than walking.

  Further, according to the present embodiment, if a change in posture is detected by the posture change detection unit 44 during the continuous walking determination after the change in posture is detected, the continuous walking determination is performed. The count of vibrations detected in step 2 is cleared and a new continuous walking determination is performed. Therefore, when the pedometer is taken out and the pedometer is checked during continuous walking as shown in the specific example 2, the number of steps is Since the vibration from when the meter is taken out is not counted, the accuracy of the step count can be improved.

  As described above, the present invention is not limited to the above-described embodiment, and various modifications can be made. For example, instead of providing the internal counting unit 42 and the display counting unit 30 separately, a single counter may be used. In this case, when the display counting stop state is entered, the count value of the counter until then is saved in the memory, the counter is used as the internal counting unit during the determination period, and is saved in the memory at the end of the determination period. The count value may be updated with the count value of the counter.

  As described above, the body motion detection device according to the present invention is useful for detecting the body motion of a subject carried by the subject and is particularly suitable for a pedometer.

It is a block diagram which shows the hardware constitutions of the body movement detection apparatus concerning this invention. It is a block diagram which shows the functional structure of the processing apparatus of the body movement detection apparatus concerning this invention. It is a wave form diagram which shows the change of acceleration. It is explanatory drawing (the 1) which shows the content of the determination of the attitude | position change in the attitude | position change detection part of the body movement detection apparatus concerning this invention. It is explanatory drawing (the 2) which shows the content of the determination of the attitude | position change in the attitude | position change detection part of the body movement detection apparatus concerning this invention. It is a flowchart which shows the body movement count processing procedure of the body movement detection apparatus concerning this invention (pattern A). It is a flowchart which shows the body movement count processing procedure of the body movement detection apparatus concerning this invention (pattern B). It is explanatory drawing (conventional pedometer) which shows the content of the display value and internal count (value) in the specific example 1. FIG. It is explanatory drawing (pattern A) which shows the content of the display value and internal count (value) in the specific example 1. FIG. It is explanatory drawing (pattern B) which shows the content of the display value and internal count (value) in the specific example 1. FIG. It is explanatory drawing (conventional pedometer) which shows the content of the display value and internal count (value) in the specific example 2. FIG. It is explanatory drawing (pedometer of the specific example 2) which shows the content of the display value and internal count (value) in the specific example 2. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Body motion detection apparatus 12 X-axis acceleration sensor 13 Y-axis acceleration sensor 14 Z-axis acceleration sensor 30 Display counting part 42 Internal counting part 43 Count update part 44 Posture change detection part

Claims (4)

Period of continuous walking determining determines a sequence of body motion (hereinafter, referred to as "continuous walk determining time period") has, in the body motion detector for counting the number of steps to is determined that the continuous motion,
Based on the posture change of the body motion detection device, start the continuous walking determination period ,
The step count display is stopped based on the posture change, the body movements in the continuous walking determination period are counted, and if it is determined that the walking is continuous by the continuous walking determination, it is counted in the continuous walking determination period. In addition to the stopped count display, the count display is updated.
A body motion detection device that clears the count of body motions counted during the continuous walking determination period when a change in posture is detected during the continuous walking determination period. The body motion detection according to claim 1 , wherein the body motion detection device includes an acceleration sensor, and the posture change is detected by a change in gravitational acceleration obtained from an acceleration value detected by the acceleration sensor. apparatus. 3. The body motion detection according to claim 2 , wherein the change in the gravitational acceleration is detected when the gravitational acceleration changes by a predetermined value or more with reference to the gravitational acceleration when the previous posture change is detected. apparatus. The acceleration sensor detects acceleration in three axial directions orthogonal, claim 2 or 3, characterized in that to detect the posture change by a change in at least any one axial gravitational acceleration of three axes the orthogonal The body motion detection device according to 1.

Images