CN111166307A - Finger position multi-parameter physiological signal acquisition device - Google Patents
Finger position multi-parameter physiological signal acquisition device Download PDFInfo
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Abstract
A finger position multi-parameter physiological signal acquisition device comprises: the heart rate data acquisition module comprises a heart rate data acquisition unit and a photoelectric signal processing unit, and the photoelectric signal processing unit is used for acquiring photoelectric signals acquired by the heart rate data acquisition unit and obtaining heart rate data and blood oxygen data; the electrocardio data acquisition module comprises an electrocardio data acquisition unit and an electrocardio data processing unit, and the electrocardio data processing unit is used for carrying out analog-to-digital conversion on the electrocardiosignals acquired by the electrocardio data acquisition unit and acquiring electrocardio data; the system comprises a skin electricity data acquisition module, a skin electricity data acquisition module and a control module, wherein the skin electricity data acquisition module is used for acquiring a skin electricity signal and performing analog-to-digital conversion to obtain skin electricity data; the skin temperature data acquisition module is used for acquiring a skin temperature signal and performing analog-to-digital conversion to obtain skin temperature data; and the processor is respectively connected with the heart rate, electrocardio, electrodermal and electrodermal data acquisition modules and is used for processing the heart rate, electrocardio, electrodermal and electrodermal data to obtain a corresponding final data sequence.
Description
Technical Field
The invention relates to a physiological signal acquisition technology, in particular to a finger part multi-parameter physiological signal acquisition device.
Background
In the prior art, a plurality of devices for measuring physiological indexes, such as an electrocardio sensor, a heart rate PPG sensor, a skin temperature SKT sensor and the like, are provided, and the sensors need to attach a plurality of electrodes on the body of a test object and can limit the state of a person, for example, the test object needs to lie flat to obtain a good signal when an electrocardiogram is made; for another example, some skin temperature sensors are forehead measurement modes, which are easily affected by ambient temperature, and both infrared sensors and contact sensors are easy to generate large measurement errors and are not convenient to use.
In addition, most of the physiological index measuring devices in the prior art need to measure physiological parameters of a test object in a static state, and cannot judge whether the state of the test object and the measuring device meet the requirement of a detection position, whether the measuring device is loosened or not in place, and the like, so that measurement errors caused by the reasons cannot be eliminated, the accuracy and reliability of physiological parameter acquisition are affected, and the accuracy and reliability of subsequent data analysis are further affected.
Disclosure of Invention
In view of the above, the present invention provides a finger portion multi-parameter physiological signal collecting apparatus to obviate or mitigate one or more of the disadvantages of the prior art.
The technical scheme of the invention is as follows:
according to an aspect of the present invention, there is provided a finger portion multi-parameter physiological signal acquisition apparatus, comprising:
the heart rate data acquisition module comprises a heart rate data acquisition unit and a photoelectric signal processing unit, wherein the photoelectric signal processing unit is used for acquiring photoelectric signals acquired by the heart rate data acquisition unit so as to measure heart rate and blood oxygen and obtain heart rate data and blood oxygen data;
the electrocardio data acquisition module comprises an electrocardio data acquisition unit and an electrocardio data processing unit, and the electrocardio data processing unit is used for carrying out analog-to-digital conversion on the electrocardiosignals acquired by the electrocardio data acquisition unit and acquiring electrocardio data;
the system comprises a skin electricity data acquisition module, a skin electricity data acquisition module and a control module, wherein the skin electricity data acquisition module is used for acquiring a skin electricity signal and performing analog-to-digital conversion to obtain skin electricity data;
the skin temperature data acquisition module is used for acquiring a skin temperature signal and performing analog-to-digital conversion to obtain skin temperature data; and
and the processor is respectively connected with the heart rate data acquisition module, the electrocardio data acquisition module, the picoelectric data acquisition module and is used for processing the heart rate data, the electrocardio data, the picoelectric data and the picoelectric data to obtain a corresponding final data sequence.
The above finger position multi-parameter physiological signal acquisition device, wherein, still include:
atmospheric pressure collection module and humiture collection module, with the treater is connected for atmospheric pressure and humiture information are in order to judge the environmental condition when gathering the test, atmospheric pressure collection module and humiture collection module directly output atmospheric pressure and humiture digital signal after acquireing atmospheric pressure and humiture information respectively, and transmit to the treater.
The above finger position multi-parameter physiological signal acquisition device, wherein, still include:
and the acceleration acquisition module is used for acquiring acceleration data in three directions of XYZ, processing the acceleration data and transmitting the processed acceleration data to the processor, judging whether the test object is in a static state or a motion state according to the acceleration data, and marking the motion point of the motion state on the electrocardio data.
In the above finger part multi-parameter physiological signal acquisition device, when the acceleration data exceeds an acceleration threshold K, it is determined that the test object is in the motion state, and the acceleration threshold K is a sum of mean values of acceleration data in XYZ three directions acquired when the test object is moving vertically or slowly.
The device for acquiring the multiparameter physiological signals of the finger part comprises a bioelectricity data acquisition electrode for acquiring a bioelectricity signal, and the bioelectricity data acquisition electrode is further used for acquiring an impedance signal, converting the impedance signal into an impedance signal data sequence R (x) through a current source circuit and transmitting the impedance signal data sequence R (x) to the processor, wherein x is time on a corresponding time axis, and R represents an impedance value.
In the above finger position multi-parameter physiological signal acquisition device, the processor determines whether the finger is stably fixed on the test object according to the impedance value, and when the measured impedance value R1 exceeds the impedance interval, the processor marks the time corresponding to the impedance value R1 as Mt 1; when the measured resistance value R2 returns to the resistance interval, the processor marks the time corresponding to the resistance value R2 as Mt2, data collected in the interval from Mt1 to Mt2 are marked as invalid data z (x), x e (t1, t2), and the resistance interval is z e (2000,1000000).
The finger part multi-parameter physiological signal acquisition device comprises a first-stage amplification circuit, a power frequency trap circuit, a second-stage amplification circuit, a Butterworth filter and an analog-to-digital conversion unit, wherein the first-stage amplification circuit, the power frequency trap circuit, the second-stage amplification circuit, the Butterworth filter and the analog-to-digital conversion unit are sequentially arranged, the first-stage amplification circuit is connected with the electrocardio data acquisition electrode, and the analog-to-digital conversion unit is connected with the processor.
The finger part multi-parameter physiological signal acquisition device further comprises a shell, wherein the heart rate data acquisition module, the electrocardio data acquisition module, the skin temperature data acquisition module, the atmospheric pressure acquisition module, the temperature and humidity acquisition module, the acceleration acquisition module, the processor, the power supply and the like are encapsulated in the shell, a heart rate data acquisition unit is arranged on the shell corresponding to the heart rate data acquisition module, and an electrocardio data acquisition electrode is arranged on the shell corresponding to the electrocardio data acquisition module; be provided with skin electric data acquisition electrode corresponding to skin electric data acquisition module, corresponding to skin temperature data acquisition module is provided with skin temperature collection window, corresponding to atmospheric pressure collection module and humiture collection module are provided with atmospheric pressure and humiture collection window.
Foretell finger position multi-parameter physiological signal collection system, wherein, be provided with finger recess, switch and bandage connecting portion on the casing, skin electric data acquisition electrode, rhythm of the heart data acquisition unit and skin temperature acquisition window set up respectively in the finger recess, the switch with the power is connected, bandage connecting portion are used for the bandage of installing and test object's finger connection.
The finger position multi-parameter physiological signal acquisition device comprises a heart rate data acquisition unit, a data acquisition unit and a data acquisition unit, wherein the heart rate data acquisition unit comprises an infrared light emitter, a red light emitter and a light receiver, the infrared light emitter and the red light emitter emit light beams at different time intervals, and the light beams emitted by the red light emitter are absorbed by the light receiver to measure heart rate data; the light beams simultaneously emitted by the infrared light emitter and the red light emitter are received by the light receiver to respectively obtain light concentrations H1 and H2, and the arterial oxygen saturation SPO2 is obtained by adopting the following calculation formula:
SPO2＝H1/(H1+H2)*100％。
the invention can collect and analyze physiological signals of a plurality of parameters, respectively collect and process the electrocardio and the picoelectric data and the impedance data, detect whether a test object is provided with a sensor according to the impedance and judge the data validity; in the data acquisition, the baseline test and the motion state identification are adopted, and the motion state is judged according to the acceleration, so that moving points are marked for electrocardio data and the like, and interference factors in multiple aspects such as motion noise and the like are removed; in addition, the change of the environmental data also serves as a judgment factor that affects the test object.
It will be appreciated by those skilled in the art that the objects and advantages that can be achieved with the present invention are not limited to the specific details set forth above, and that these and other objects that can be achieved with the present invention will be more clearly understood from the detailed description that follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
fig. 1 is a schematic structural diagram of a collecting device according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a collecting device according to another embodiment of the present invention;
fig. 3 is a schematic diagram of the operation of an embodiment of the present invention.
Wherein the reference numerals
101 casing
102 skin electric data acquisition electrode
103 finger groove
104 infrared light emitter
105 optical receiver
106 electrocardio data acquisition electrode
107 switch
108 strap connecting part
109 skin temperature acquisition window
110 atmospheric pressure and humiture collection window
111 red light transmitter
112 antenna
113 acceleration sensor
114 heart rate data acquisition unit
201 acceleration acquisition module
202 skin electricity data acquisition module
203 photoelectric signal processing unit
204 skin temperature data acquisition module
205 atmospheric pressure acquisition module
206 humiture acquisition module
207 impedance analysis module
208 processor
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the following embodiments and accompanying drawings. The exemplary embodiments and descriptions of the present invention are provided to explain the present invention, but not to limit the present invention.
It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and/or processing steps closely related to the scheme according to the present invention are shown in the drawings, and other details not so relevant to the present invention are omitted.
It should be emphasized that the term "comprises/comprising/comprises/having" when used herein, is taken to specify the presence of stated features, elements, steps or components, but does not preclude the presence or addition of one or more other features, elements, steps or components.
It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a collecting device according to an embodiment of the present invention. The invention relates to a finger part multi-parameter physiological signal acquisition device, which comprises: the heart rate data acquisition module comprises a heart rate data acquisition unit 114 and a photoelectric signal processing unit 203, wherein the photoelectric signal processing unit is used for acquiring photoelectric signals acquired by the heart rate data acquisition unit 114 to perform heart rate and blood oxygen measurement and obtain heart rate data and blood oxygen data; the electrocardio data acquisition module comprises an electrocardio data acquisition unit and an electrocardio data processing unit, and the electrocardio data processing unit is used for carrying out analog-to-digital conversion on the electrocardiosignals acquired by the electrocardio data acquisition unit and acquiring electrocardio data; the skin electricity data acquisition module 202 is used for acquiring a skin electricity signal and performing analog-to-digital conversion to obtain skin electricity data; the skin temperature data acquisition module 204 is used for acquiring a skin temperature signal and performing analog-to-digital conversion to obtain skin temperature data; and the processor 208 is respectively connected with the heart rate data acquisition module, the electrocardio data acquisition module, the picoelectric data acquisition module 202 and the picotemperature data acquisition module 204 and is used for processing the heart rate data, the electrocardio data, the picoelectric data and the picotemperature data to obtain corresponding final data sequences. The processor 208 is preferably a micro control unit MCU. The transmission of data may preferably be via bluetooth. The acquisition device also comprises a plurality of basic circuit components, including a power circuit, a charging circuit, a data transmission circuit and the like, and the specific components, structures, functions and the like of the circuits are not repeated herein because the components, functions, working principles and the like of the circuits are mature prior art.
In this embodiment, the device further includes an atmospheric pressure acquisition module 205 and a temperature and humidity acquisition module 206, which are connected to the processor 208, and configured to acquire atmospheric pressure and temperature and humidity information during a test to determine an environmental state, where the environmental state is also an important index for analyzing a psychological state of a test object, and the atmospheric pressure acquisition module 205 and the temperature and humidity acquisition module 206 directly output an atmospheric pressure and temperature and humidity digital signal after acquiring the atmospheric pressure and temperature and humidity information, respectively, and transmit the atmospheric pressure and temperature and humidity digital signal to the processor 208. The device also comprises an acceleration acquisition module 201, which is used for acquiring acceleration data in three directions of XYZ, processing the acceleration data and transmitting the processed acceleration data to the processor 208, judging whether the test object is in a static state or a moving state according to the acceleration data, and marking the moving point of the moving state on the electrocardio data and the like.
The finger part multi-parameter physiological signal acquisition device of the embodiment further comprises a shell 101, wherein the heart rate data acquisition module, the electrocardiogram data acquisition module, the skin temperature data acquisition module 202, the skin temperature data acquisition module 204, the atmospheric pressure acquisition module 205, the temperature and humidity acquisition module 206, the acceleration acquisition module 201, the processor 208 and the power supply are packaged in the shell 101, the shell 101 is provided with a heart rate data acquisition unit 114 corresponding to the heart rate data acquisition module, and the electrocardiogram data acquisition module is provided with an electrocardiogram data acquisition electrode 106 corresponding to the electrocardiogram data acquisition module; a skin temperature data acquisition electrode 102 is arranged corresponding to the skin temperature data acquisition module 202, a skin temperature acquisition window 109 is arranged corresponding to the skin temperature data acquisition module 204, and an air pressure and temperature and humidity acquisition window 110 is arranged corresponding to the atmospheric pressure acquisition module 205 and the temperature and humidity acquisition module 206. Wherein, for the test convenience, preferably be in casing 101 upper surface is provided with finger recess 103, skin electric data acquisition electrode 102, heart rate data acquisition unit 114 and skin temperature collection window 109 set up respectively in finger recess 103, set up switch 107 in the one end of casing 101, switch 107 with the power is connected for control whole collection system open and close. The two sides of the shell 101 are provided with the binding belt connecting parts 108, and the binding belt connecting parts 108 are used for installing binding belts connected with fingers of a test object, so that the acquisition device can be directly fixed on the fingers through the binding belts without any auxiliary electrodes, and the wearing and the signal acquisition can be completed only by keeping the positive direction of a sensor of the acquisition device consistent with the direction of a certain finger of the test object.
Referring to fig. 2, fig. 2 is a schematic structural view of a collecting device according to another embodiment of the present invention. The difference between the present embodiment and the previous embodiment is only that two finger grooves 103 on the housing 101 are arranged in parallel, and the two electrodermal data acquisition electrodes 102 are respectively arranged in the two finger grooves 103 and symmetrically arranged; the heart rate data acquisition unit 114 is arranged in one finger groove 103, and the skin temperature acquisition window 109 is arranged in the other finger groove 103 and corresponds to the heart rate data acquisition unit 114. The electrocardiogram data acquisition electrode 106 and the switch 107 are located at one end of the housing 101 and are respectively located at positions close to both sides. In the above embodiment, the heart rate data acquisition unit 114 is located at the first knuckle position of the finger groove 103, the skin temperature acquisition window 109 is located at the third knuckle position of the finger groove 103, the two skin temperature acquisition electrodes 102 are located between the skin temperature acquisition window 109 and the heart rate data acquisition unit 114, and the two skin temperature acquisition electrodes 102 are arranged in parallel; the electrocardio data acquisition electrode 106 is positioned in the middle of the upper side of one end of the shell 101, the electrocardio data acquisition electrode 106 is combined with the other two electrocardio data acquisition electrodes 102 to finish the measurement of electrocardio data (ECG), and the electrocardio data acquisition electrode 106 is connected with the finger of the other hand to finish the acquisition of Electrocardiosignals (ECG); the switch 107 is located at a position offset to the side on the lower side of the end of the housing 101; the air pressure and temperature/humidity acquisition window 110 is located on one side of the housing 101 and is far away from the binding connection portion as far as possible so as not to be shielded when the binding band is fixed.
The heart rate data acquisition unit 114 of this embodiment includes the infrared light emitter 104, the red light emitter 111, and the light receiver 105, and completes acquisition of the heart rate data PPG together; the infrared light transmitter 104 and the red light transmitter 111 emit light beams in time intervals, and the light beams emitted by the red light transmitter 111 are absorbed by the light receiver 105 to obtain heart rate data; the light beams emitted by the infrared light emitter 104 and the red light emitter 111 simultaneously are received by the light receiver 105, and then the light concentrations H1 and H2 are obtained respectively, and the arterial oxygen saturation SPO2 is obtained by adopting the following formula:
SPO2＝H1/(H1+H2)*100％。
for example, the present embodiment preferably has the emission wavelength of the infrared light emitter 104 of 940 nm; the red light transmitter 111 transmits visible red light with a wavelength of 660 nm; the infrared light emitter 104 and the red light emitter 111 emit light beams in time intervals; the frequency of the light beam emitted by the infrared light emitter 104 is 1024 Hz; the frequency of the light beam emitted by the red light transmitter 111 is 512 Hz; the finger is placed on the photoelectric device, the light beams emitted by the infrared light emitter 104 and the red light emitter 111 irradiate the first fingertip of the finger, and the light source is reflected to the light receiver 105 through blood and skin; each ejection of blood from the heart causes the contraction and expansion of the blood vessels, the direct reaction is the change of the light intensity which is sensed by the light receiver 105, so that the data are continued to form heart rate PPG and blood oxygen SPO2 data; the emission light beam of the red light transmitter 111 is absorbed by the light receiver 105 and is measured as heart rate PPG signal data; the infrared light emitter 104 and the red light emitter 111 emit light beams simultaneously, and the light concentrations H1 and H2 are obtained after the light beams are received by the light receiver 105; the blood oxygen value obtained is thus SPO2 ═ H1/(H1+ H2) × 100%.
Referring to fig. 3, fig. 3 is a schematic diagram of the operation of an embodiment of the present invention. Before testing, a test object needs to wipe the ECG data acquisition electrode 102 with medical alcohol, and if the ECG data is required to be tested, the ECG data acquisition electrode 106 needs to be wiped together; placing a finger in the finger groove 103, wherein the finger belly faces to one side of the skin electric data acquisition electrode 102; fixing the magic tape on the binding connection part, and sticking the finger wound with the test object for a circle on the magic tape; a skin temperature acquisition window 109 adopting an infrared thermocouple; the patch is required to be attached to one side of the skin of the third knuckle of the test object finger, so that the patch does not need to be contacted with the skin; note that the air pressure and temperature/humidity acquisition window 110 cannot be covered by the hook-and-loop fastener, and needs to be aligned with the outer side of the housing 101 to measure the environmental temperature change. The skin electric data acquisition electrode 102 and the electrocardio data acquisition electrode 106 respectively acquire skin electric data EDA and electrocardio data ECG; the electrocardiographic data processing unit of the embodiment includes a first-stage amplification circuit, a power frequency trap circuit, a second-stage amplification circuit, a butterworth filter, and an analog-to-digital conversion unit, which are sequentially arranged, the first-stage amplification circuit is connected with the electrocardiographic data acquisition electrode 106, and the analog-to-digital conversion unit is connected with the processor 208. Weak electric signals acquired by the electrodermal data acquisition electrode 102 and the electrocardiographic data acquisition electrode 106 are transmitted into a first-stage amplifying circuit, the first-stage amplifying circuit amplifies the signals by 20 times, and then the signals enter a power frequency trap circuit to filter power frequency interference of 50 Hz; then the signal enters a second-stage amplifying circuit, and the second-stage amplifying circuit amplifies the signal by 100 times; then the signal enters a first branch of an analog-digital conversion chip after being filtered by a Butterworth filter. The skin temperature acquisition window 109 preferably adopts an infrared thermocouple acquisition window and is used for acquiring data of skin temperature SKT; the infrared thermocouple acquisition window converts the temperature of the epidermis into a body temperature analog signal by utilizing an infrared principle; the converted body temperature analog signal enters a first amplifying circuit to be amplified by 5 times, and then enters a power frequency trap circuit to filter power frequency interference of 50 Hz; then the signal enters a second-stage amplifying circuit, and the second-stage amplifying circuit amplifies the signal by 20 times; the body temperature analog signal after the amplification and filtering processing enters a second branch of the analog-to-digital conversion chip; data of a first branch and a second branch of an analog-to-digital conversion chip ADC are transmitted to a micro control unit MCU in an SPI mode; finally, all data are processed by the MCU, and after the MCU processes the data, the data can be sent to a server, a personal computer PC or a mobile terminal by the antenna 112 in a Bluetooth mode. The sensors corresponding to the air pressure and temperature and humidity acquisition window 110 can directly output digital signals of related air pressure and temperature and humidity according to environmental factors, and transmit air pressure and environmental temperature data to the MCU through the SPI communication mode.
The processor 208 determines whether the acquisition device is stably fixed to the finger of the test subject and deletes invalid data when the fixation is unstable when synthesizing the final data sequence. The electrodermal data acquisition module 202 comprises an electrodermal data acquisition electrode 102 for acquiring electrodermal signals, the electrodermal data acquisition electrode 102 is further used for acquiring impedance signals, and the impedance signals are converted into impedance signal data sequences R (x) through a current source circuit and transmitted to the processor 208, wherein x is time on a corresponding time axis, and R represents an impedance value, that is to say, the two electrodermal data acquisition electrodes 102 finish acquisition of electrodermal data and impedance data. Setting an impedance interval as z e (2000,1000000); when the impedance analysis module 207 analyzes that the measured impedance value R1 exceeds the impedance interval, the processor 208 marks the time corresponding to the impedance value R1 as Mt 1; when the impedance value R2 analyzed and measured by the impedance analysis module 207 returns to the impedance interval, the processor 208 marks the time corresponding to the impedance value R2 as Mt2, and data collected in the interval from Mt1 to Mt2 is marked as invalid data z (x), x e (t1, t 2). In other words, a further compromise between the two galvanic data collection electrodes 102 is the impedance measurement; the impedance test aims at judging whether the signal acquisition device is carried by a test object; the bioelectricity data acquisition electrode 102 has a frequency of 1Hz to acquire impedance while acquiring the EDA; a current source is provided between the electrodesamplers 102 for calculating impedance. Assuming that the calculated impedance value is z, then z e (2000,1000000); if the measured impedance is not in the range, the microprocessing unit MCU marks the system as Mt 1; when z returns to the impedance interval again, the MCU marks the system again, and the mark is recorded as Mt 2; then the data collected during this time t 1-t 2 is invalid data, denoted as z (x), x e (t1, t 2); and finally, deleting the invalid data of the corresponding data sequence by the microprocessing unit (MCU) during data synthesis.
The acceleration sensor 113 can use an acceleration sensor 113 chip of ST company to complete the acquisition of acceleration data, which is used to analyze and determine what state the test object is in at present, such as a moving state or a resting state; the acceleration sensor 113 acquires acceleration data of the XYZ three axes of the acceleration sensor 113 chip; the acceleration sensor 113 chip processes XYZ data. Setting an acceleration threshold K of a test object before testing, judging that the test object is in the motion state when the acceleration data exceeds the acceleration threshold K, wherein the acceleration threshold K is the sum of mean values of acceleration data in three directions of XYZ acquired when the test object is in a standing state or in a slow walking state. The test subject is sitting still, because the sensor is on the finger, the data of XYZ is stable; assume that the threshold on the X-axis is 9.8; the axis of YZ is 1; which axis is 9.8 depends on the placement of the hand of the test subject; when the test object is standing and walking slowly, data acquisition is carried out, and the sum of the mean values of the acquired data of each axis XYZ is recorded as an acceleration threshold value K; exceeding this acceleration threshold is considered a motion state.
The data acquisition process of one embodiment of the invention is as follows:
the skin electric data acquisition electrode 102 and the electrocardio data acquisition electrode 106 acquire electric signals, and branch into 2 paths of signals after passing through the electrocardio data acquisition electrode 106, wherein one path of signals is electrocardio-ECG signals, and the other path of signals is skin electric EDA signals; the bioelectric signal EDA can be directly acquired through the bioelectric data acquisition electrode 102, the acquired data sequence of the bioelectric signal EDA is recorded as G (x), x is time on a corresponding time axis, and G (x) represents an original signal value of the EDA; meanwhile, the bioelectrical data acquisition electrode 102 acquires impedance signal data at a frequency of 1 Hz; converting the signals acquired by the electrodermal data acquisition electrode 102 into an impedance signal data sequence R (x) by a current source circuit; x is the time on the corresponding time axis, R (x) represents the original impedance signal value; the ECG signal is a voltage signal, and the fingers of the other hand except the fingers bound with the acquisition device are required to be attached to the ECG data acquisition electrode 106 for acquiring the ECG signal; the acquired ECG data can be directly used for obtaining a data sequence E (x) after being subjected to Butterworth filtering, wherein x is time on a corresponding time axis, and E (x) represents an original signal value of the ECG; the acceleration sensor 113 is located inside the casing 101, and transmits the acquired data to the acceleration acquisition module 201 to obtain data sequences of X (X), Y (X), and Z (X), where X is time on a corresponding time axis, X (X) represents an acceleration value obtained on the X axis, Y (X) represents an acceleration value obtained on the Y axis, and Z (X) represents an acceleration value obtained on the Z axis; the data sequence measured by the skin temperature sensor SKT through the infrared thermocouple principle is T (x), x is time on a corresponding time axis, and T (x) represents a skin temperature value; the data sequence obtained by the temperature and humidity acquisition module 206 acquiring the environmental temperature and humidity data of the test object is TR (x), wherein x is the time on the corresponding time axis; TR (x) represents the collected temperature and humidity value; the atmospheric pressure data sequence of the environment where the atmospheric pressure acquisition module 205 acquires the test object is P (x), where x is time on the corresponding time axis, and P (x) represents an atmospheric pressure value at the corresponding time.
In the data acquisition process, all data acquisition is synchronous acquisition; when the acquired acceleration value exceeds the set acceleration threshold value and the measured acceleration value exceeds the acceleration threshold value for the first time, the processor 208 respectively carries out data marking on the ECG/SKT/EDA, the corresponding marking point is marked as MARKt1, and when the measured acceleration value falls back to the acceleration threshold value, the processor 208 marks the corresponding marking point as MARKt 2; the MARK points have corresponding time points on the x axis, which are marked as t1 and t 2; the electrocardiogram data ECG of the intervals t1 and t2 is recorded as motion data E (m); t1 < m < t 2; at the moment, the corresponding skin electricity data EDA is recorded as G (m); t1 < m < t 2; at this time, corresponding skin temperature data SKT is marked as T (m); t1 < m < t 2; at this time, corresponding temperature and humidity data RH is recorded as TR (m); t1 < m < t 2; at this time, the corresponding atmospheric pressure data ATM is marked as P (m); t1 < m < t 2; the corresponding acceleration data are recorded as X (m), Y (m) and Z (m); t1 < m < t 2.
The test object may be in a motion state or a static state, and for non-motion data measured by the test object in the static state, data without motion interference is not required to be filtered; for the motion data measured by the test object in the motion state, the motion interference is filtered. A kalman filter is preferably employed in the present embodiment. The Kalman filter takes the sum of data of acceleration XYZ axes as the input of the Kalman filter;
let k be X (m) + Y (m) + Z (m), t1 < m < t 2;
the new filtered data is: i (k | k-1) ═ A I (k-1| k-1) + B U (k);
wherein, I is the corresponding parameter data sequence, A and B are system parameters; u (k) is a control quantity of a state at a certain time;
therefore, a new heart rate data sequence D (k) after filtering can be obtained, wherein t1 < k < t 2;
a new electrocardio data sequence E (k), t1 < k < t 2;
a new sequence of galvanic data G (k), t1 < k < t 2;
a new skin temperature data sequence T (k), T1 < k < T2;
a new temperature and humidity data sequence TR (k), t1 < k < t 2;
a new atmospheric data sequence P (k), t1 < k < t 2;
respectively bringing the new data sequences obtained after filtering back to the corresponding original data sequences; replacing the original sequence with motion interference; obtaining a new data sequence after replacement:
D’(m)；E’(m)；G’(m)；T’(m)；TR’(m)；P’(m)；------------------------①
simultaneously, two electrodes of the electrodermal data acquisition electrode 102 will also measure a set of data sequences, z (x), x e (t1, t 2); the impedance sequence is data beyond a calibrated impedance range z epsilon (2000,1000000), and refers to a data sequence which is obtained in the process that a test object receives a test and is bad and invalid; the data of the original sequence needs to be deleted to ensure the validity of the data.
subtracting the invalid data sequence z (x) from the new data sequence obtained in equation (r), x ∈ (t1, t2), and obtaining the following final data sequence:
D”(m)；E”(m)；G”(m)；T”(m)；TR”(m)；P”(m)；------------------②
wherein;
D”(m)＝D’(m)-z1(x)，x，m∈(t1，t2)；
E”(m)＝E’(m)-z2(x)，x，m∈(t1，t2)；
G”(m)＝G’(m)–z3(x)，x，m∈(t1，t2)；
T”(m)＝T’(m)–z4(x)，x，m∈(t1，t2)；
TR”(m)＝TR’(m)–z5(x)，x，m∈(t1，t2)；
P”(m)＝P’(m)–z6(x)，x，m∈(t1，t2)；
wherein z is1(x)，z2(x)，z3(x)，z4(x)，z5(x)，z6(x) Respectively, invalid data sequences of the corresponding data sequences.
Therefore, the acquisition device of the invention obtains the final data sequence which can be used for subsequent data analysis.
The acquisition of multiple physiological parameters of the invention mainly comprises the following physiological parameters: heart rate data (PPG), electrocardiogram data (ECG), skin temperature data (SKT), acceleration data (ACC), skin Electric Data (EDA), air pressure data (ATM), environment temperature and humidity data (TRH), and the like. In the collection process, a test object can move in the test process, the collection device can record the motion state of the test object and filter the motion noise in the collection process, meanwhile, the collection of the electrocardio data and the environmental data are also carried out, the actual physiological data of the test object can be obtained through the data, the environmental state of the test object can be judged through the air pressure (ATM) data and the environmental temperature and humidity (TRH) data, the psychological reaction and the psychological state of the test object in a certain specific environment can be analyzed, and the influence of environmental factors on the test object and the like can be researched.
Those of ordinary skill in the art will appreciate that the various illustrative components, systems, and methods described in connection with the embodiments disclosed herein may be implemented as hardware, software, or combinations of both. Whether this is done in hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention. When implemented in hardware, it may be, for example, an electronic circuit, an Application Specific Integrated Circuit (ASIC), suitable firmware, plug-in, function card, or the like. When implemented in software, the elements of the invention are the programs or code segments used to perform the required tasks. The program or code segments may be stored in a machine-readable medium or transmitted by a data signal carried in a carrier wave over a transmission medium or a communication link. A "machine-readable medium" may include any medium that can store or transfer information. Examples of a machine-readable medium include electronic circuits, semiconductor memory devices, ROM, flash memory, Erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, fiber optic media, Radio Frequency (RF) links, and so forth. The code segments may be downloaded via computer networks such as the internet, intranet, etc.
It should also be noted that the exemplary embodiments mentioned in this patent describe some methods or systems based on a series of steps or devices. However, the present invention is not limited to the order of the above-described steps, that is, the steps may be performed in the order mentioned in the embodiments, may be performed in an order different from the order in the embodiments, or may be performed simultaneously.
Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments and/or in combination with or instead of the features of the other embodiments in the present invention.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made to the embodiment of the present invention by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A finger position multi-parameter physiological signal acquisition device is characterized by comprising:
the heart rate data acquisition module comprises a heart rate data acquisition unit and a photoelectric signal processing unit, wherein the photoelectric signal processing unit is used for acquiring photoelectric signals acquired by the heart rate data acquisition unit so as to measure heart rate and blood oxygen and obtain heart rate data and blood oxygen data;
the electrocardio data acquisition module comprises an electrocardio data acquisition unit and an electrocardio data processing unit, and the electrocardio data processing unit is used for carrying out analog-to-digital conversion on the electrocardiosignals acquired by the electrocardio data acquisition unit and acquiring electrocardio data;
the system comprises a skin electricity data acquisition module, a skin electricity data acquisition module and a control module, wherein the skin electricity data acquisition module is used for acquiring a skin electricity signal and performing analog-to-digital conversion to obtain skin electricity data;
the skin temperature data acquisition module is used for acquiring a skin temperature signal and performing analog-to-digital conversion to obtain skin temperature data; and
and the processor is respectively connected with the heart rate data acquisition module, the electrocardio data acquisition module, the picoelectric data acquisition module and is used for processing the heart rate data, the electrocardio data, the picoelectric data and the picoelectric data to obtain a corresponding final data sequence.
2. The finger portion multi-parameter physiological signal acquisition device according to claim 1, further comprising:
atmospheric pressure collection module and humiture collection module, with the treater is connected for atmospheric pressure and humiture information are in order to judge the environmental condition when gathering the test, atmospheric pressure collection module and humiture collection module directly output atmospheric pressure and humiture digital signal after acquireing atmospheric pressure and humiture information respectively, and transmit to the treater.
3. The finger portion multi-parameter physiological signal acquisition device according to claim 1 or 2, further comprising:
and the acceleration acquisition module is used for acquiring acceleration data in three directions of XYZ, processing the acceleration data and transmitting the processed acceleration data to the processor, judging whether the test object is in a static state or a motion state according to the acceleration data, and marking the motion point of the motion state on the electrocardio data.
4. The finger portion multi-parameter physiological signal acquisition device according to claim 3, wherein the test subject is determined to be in the exercise state when the acceleration data exceeds an acceleration threshold value K, and the acceleration threshold value K is a sum of mean values of acceleration data in three XYZ directions acquired when the test subject is walking upright or slowly.
5. The device for acquiring multiparameter physiological signals of a finger portion according to claim 3, wherein the electrodermal data acquisition module includes an electrodermal data acquisition electrode for acquiring electrodermal signals, and the electrodermal data acquisition electrode is further configured to acquire impedance signals, convert the impedance signals into an impedance signal data sequence R (x) through a current source circuit, and transmit the impedance signal data sequence R (x) to the processor, where x is time on a corresponding time axis, and R represents an impedance value.
6. The finger position multi-parameter physiological signal acquisition device according to claim 5, wherein the processor judges whether the finger is stably fixed on the test object according to the impedance value, and when the measured impedance value R1 exceeds the impedance interval, the processor marks the time corresponding to the impedance value R1 as Mt 1; when the measured resistance value R2 returns to the resistance interval, the processor marks the time corresponding to the resistance value R2 as Mt2, data collected in the interval from Mt1 to Mt2 are marked as invalid data z (x), x e (t1, t2), and the resistance interval is z e (2000,1000000).
7. The finger portion multi-parameter physiological signal acquisition device according to claim 3, wherein the electrocardiographic data processing unit comprises a first-stage amplification circuit, a power frequency trap circuit, a second-stage amplification circuit, a Butterworth filter and an analog-to-digital conversion unit which are sequentially arranged, the first-stage amplification circuit is connected with the electrocardiographic data acquisition electrode, and the analog-to-digital conversion unit is connected with the processor.
8. The finger portion multi-parameter physiological signal acquisition device according to claim 3, further comprising a housing, wherein the heart rate data acquisition module, the electrocardiogram data acquisition module, the skin temperature data acquisition module, the atmospheric pressure acquisition module, the temperature and humidity acquisition module, the acceleration acquisition module, the processor, the power supply and the like are encapsulated in the housing, the housing is provided with a heart rate data acquisition unit corresponding to the heart rate data acquisition module, and an electrocardiogram data acquisition electrode corresponding to the electrocardiogram data acquisition module; be provided with skin electric data acquisition electrode corresponding to skin electric data acquisition module, corresponding to skin temperature data acquisition module is provided with skin temperature collection window, corresponding to atmospheric pressure collection module and humiture collection module are provided with atmospheric pressure and humiture collection window.
9. The finger portion multi-parameter physiological signal acquisition device according to claim 8, wherein a finger groove, a switch and a bandage connecting portion are provided on the housing, the electrodermal data acquisition electrode, the heart rate data acquisition unit and the skin temperature acquisition window are respectively provided in the finger groove, the switch is connected with the power supply, and the bandage connecting portion is used for installing a bandage connected with a finger of a test subject.
10. The finger position multi-parameter physiological signal acquisition device according to claim 9, wherein the heart rate data acquisition unit comprises an infrared light emitter, a red light emitter and a light receiver, the infrared light emitter and the red light emitter emit light beams at time intervals, and the light beams emitted by the red light emitter are absorbed by the light receiver to measure the heart rate data; the light beams simultaneously emitted by the infrared light emitter and the red light emitter are received by the light receiver to respectively obtain light concentrations H1 and H2, and the arterial oxygen saturation SPO2 is obtained by adopting the following calculation formula:
SPO2＝H1/(H1+H2)*100％。
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