JP6831219B2 - Vital signal acquisition device, vital signal acquisition method and computer program - Google Patents

Description

The present invention relates to a technique for acquiring a vital signal.

In recent years, it has become easier to obtain human vital information. Vital information is information related to human life activity, and includes, for example, heartbeat and electrocardiographic information. For example, there is known a wearable technique that can acquire vital information just by wearing it by using a technique of generating an electrode material by coating the fiber surface. By using such a technique, vital information that could be acquired only by a medical device in the past can be acquired in real time in daily life (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2016-150102

However, depending on the environment in which the vital information is acquired, noise may be mixed in the acquired vital information. For example, noise may be mixed in the acquired vital information due to the displacement of the electrodes of the sensor according to the movement of the user's body. Conventionally, a technique for removing noise generated by a factor different from the user's body movement (for example, fluctuation of contact impedance due to the influence of sweat or respiration) has been proposed, but the noise generated according to the body movement is appropriate. Could not be removed. Due to the mixing of such noise, the accuracy of the obtained vital information may be lowered.
In view of the above circumstances, an object of the present invention is to provide a technique capable of improving the accuracy of vital information.

One aspect of the present invention is a non-vital signal acquisition unit that acquires a user's vital signal from a vital sensor, and a non-vital signal that acquires a non-vital signal indicating a movement that causes noise of the vital signal in the vital sensor. The vital signal acquisition unit, the noise generation estimation unit that estimates whether or not noise is generated in the vital signal based on the non-vital signal, the vital signal estimated that the noise is generated, or the noise. This is a vital signal acquisition device including a correction unit for correcting vital information obtained based on the vital signal estimated to have occurred.

One aspect of the present invention is the vital signal acquisition device, further including a noise scale estimation unit that estimates the magnitude of noise in the vital signal, and the correction unit differs depending on the magnitude of the noise. Make corrections by the method.

One aspect of the present invention is the above-mentioned vital signal acquisition device, wherein the non-vital sensor is a body movement sensor that indicates a body movement that is the movement of the user's body, or a movement of a moving body that moves the user. Includes a moving body sensor that indicates.

One aspect of the present invention is a non-vital signal acquisition step of acquiring a user's vital signal from a vital sensor, and a non-vital signal that acquires a non-vital signal indicating a movement that causes noise of the vital signal in the vital sensor. The vital signal acquisition step, the noise generation estimation step for estimating whether or not noise is generated in the vital signal based on the non-vital signal, the vital signal estimated to have generated the noise, or the noise. It is a vital signal acquisition method including a correction step for correcting vital information obtained based on the vital signal presumed to have occurred.

One aspect of the present invention is a non-vital signal acquisition step of acquiring a user's vital signal from a vital sensor, and a non-vital signal that acquires a non-vital signal indicating a movement that causes noise of the vital signal in the vital sensor. The vital signal acquisition step, the noise generation estimation step for estimating whether or not noise is generated in the vital signal based on the non-vital signal, the vital signal estimated to have generated the noise, or the noise. This is a computer program for causing a computer to execute a correction step for correcting vital information obtained based on the vital signal presumed to have occurred.

According to the present invention, it is possible to improve the accuracy of vital information.

It is a schematic block diagram which shows the system structure of the vital signal acquisition system 100 of this invention. It is a figure which shows the specific example of a vital signal and a non-vital signal. It is a figure which shows the specific example of the vital signal which generated small noise. A specific example of the vital signal corrected by the correction unit 108 is shown. It is a figure which shows the specific example of the vital signal which generated a large noise. A specific example of the vital signal corrected by the correction unit 108 is shown. It is a figure for demonstrating the detection method of the R wave in the vital information acquisition unit 109. It is a flowchart which shows the specific example of the processing flow of a vital signal acquisition apparatus 10.

Hereinafter, a specific configuration example of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic block diagram showing a system configuration of the vital signal acquisition system 100 of the present invention. The vital signal acquisition system 100 includes a vital signal acquisition device 10, a vital sensor 20, a body motion sensor 30, and a vehicle sensor 40. The vital signal acquisition device 10 and each sensor (vital sensor 20, body motion sensor 30, and vehicle sensor 40) transmit and receive data by communicating. The communication performed between the vital signal acquisition device 10 and each sensor may be wireless communication or wired communication. This communication may be, for example, short-range wireless communication (eg, Bluetooth®).

The vital signal acquisition device 10 is configured by using, for example, a smartphone, a mobile phone, a tablet terminal, a personal computer, a game device, or the like. The vital signal acquisition device 10 acquires the vital signal acquired by the vital sensor 20 and the non-vital signal acquired by the non-vital sensor (for example, the body motion sensor 30 and the vehicle sensor 40) by wireless communication or wired communication. .. The vital signal acquisition device 10 estimates the generation of noise in the vital signal acquired by the vital sensor 20 based on the acquired non-vital signal. The vital signal acquisition device 10 performs correction processing on the vital signal acquired by the vital sensor 20 and the vital information obtained from the vital signal according to the estimation result. Through such processing, the vital signal acquisition device 10 can acquire more accurate vital signals and vital information.

The vital sensor 20 acquires the user's vital signal. The vital signal is a signal indicating information related to the life activity of the user's body. The vital signal is a signal indicating changes in time series such as action potential of the heart, respiratory activity, and blood pressure. In the present embodiment, the vital sensor 20 acquires the action potential (electrocardiographic data) of the user's heart as a vital signal. The vital sensor 20 associates the acquired vital signal with the date and time when the vital signal was acquired and transmits the acquired vital signal to the vital signal acquisition device 10 by wireless communication or wired communication. The vital sensor 20 may be configured to be wearable, for example.

The body motion sensor 30 is an aspect of a non-vital sensor. The body motion sensor 30 acquires the body motion signal of the user. The body motion signal is a signal related to the movement (for example, vibration) of the user's body. The body motion sensor 30 may be configured by using, for example, a triaxial acceleration sensor carried or worn on the user's body. The body motion sensor 30 associates the acquired body motion signal with the date and time when the body motion signal was acquired and transmits the acquired body motion signal to the vital signal acquisition device 10 by wireless communication or wired communication.

The vehicle sensor 40 is an aspect of a non-vital sensor. The vehicle sensor 40 acquires a vehicle motion signal on which the user is riding. The vehicle motion signal is a signal relating to the movement (for example, vibration) of the vehicle in which the user is riding. The vehicle sensor 40 may be configured by using, for example, a triaxial acceleration sensor provided on the vehicle body. The vehicle sensor 40 associates the acquired vehicle motion signal with the date and time when the vehicle motion signal was acquired and transmits the acquired vehicle motion signal to the vital signal acquisition device 10 by wireless communication or wired communication.

Next, a specific functional configuration of the vital signal acquisition device 10 will be described. The vital signal acquisition device 10 includes a CPU (Central Processing Unit), a memory, an auxiliary storage device, and the like connected by a bus, and executes a vital signal acquisition program. By executing the vital signal acquisition program, the vital signal acquisition device 10 has the communication unit 101, the vital signal acquisition unit 102, the vital signal storage unit 103, the non-vital signal acquisition unit 104, the non-vital signal storage unit 105, and the noise generation estimation unit 106. The device functions as a device including a noise scale estimation unit 107, a correction unit 108, a vital information acquisition unit 109, and a vital information storage unit 110. Even if all or part of each function of the vital signal acquisition device 10 is realized by using hardware such as ASIC (Application Specific Integrated Circuit), PLD (Programmable Logic Device), and FPGA (Field Programmable Gate Array). Good. Further, the vital signal acquisition program may be recorded on a computer-readable recording medium. The computer-readable recording medium is, for example, a flexible disk, a magneto-optical disk, a portable medium such as a ROM or a CD-ROM, or a storage device such as a hard disk built in a computer system. Further, the vital signal acquisition program may be transmitted and received via a telecommunication line.

The communication unit 101 is configured by using a network interface. The communication unit 101 transmits / receives data between the vital sensor 20 and the non-vital sensor. In the present embodiment, the communication unit 101 transmits / receives data to / from the body motion sensor 30 and the vehicle sensor 40 as a non-vital sensor.

The vital signal acquisition unit 102 acquires the vital signal from the data received from the vital sensor 20 among the data received by the communication unit 101. The vital signal acquisition unit 102 writes the acquired vital signal to the vital signal storage unit 103.

The vital signal storage unit 103 is configured by using a storage device such as a magnetic hard disk device or a semiconductor storage device. The vital signal storage unit 103 stores the vital signal acquired by the vital signal acquisition unit 102 in association with the information on the date and time when the vital signal was acquired.

The non-vital signal acquisition unit 104 acquires the non-vital signal from the data received from the non-vital sensor (for example, the body motion sensor 30 and the vehicle sensor 40) among the data received by the communication unit 101. The non-vital signal acquisition unit 104 writes the acquired non-vital signal to the non-vital signal storage unit 105.

The non-vital signal storage unit 105 is configured by using a storage device such as a magnetic hard disk device or a semiconductor storage device. The non-vital signal storage unit 105 stores the non-vital signal acquired by the non-vital signal acquisition unit 104 in association with information on the date and time when the non-vital signal was acquired.

The noise generation estimation unit 106 estimates whether or not noise is generated in the vital signal based on the non-vital signal. For example, the noise generation estimation unit 106 generates noise in the vital signal in a predetermined time width (hereinafter referred to as “noise generation section”) in which a waveform satisfying a predetermined noise generation condition is detected in the non-vital signal. I presume that it is. The noise generation condition may be, for example, that an amplitude larger than the threshold value is generated, an amplitude larger than the threshold value may be continuously generated at a predetermined time, or under other conditions. There may be. When the signal of the three-axis accelerometer is obtained as the non-vital signal, the noise generation estimation unit 106 may estimate the noise generation based on the combined value of x, y and z, or any one of them. Alternatively, the generation of noise may be estimated based on a plurality of values.

The noise scale estimation unit 107 estimates the scale of the noise magnitude in the section (noise generation section) estimated by the noise generation estimation unit 106 to generate noise. For example, the noise scale estimation unit 107 indicates that when a predetermined condition (hereinafter referred to as “large noise condition”) is satisfied in the vital signal in the noise generation section, the vital signal is subjected to large-scale noise (hereinafter referred to as “large noise”). ".) Is presumed to have occurred. On the other hand, the noise scale estimation unit 107 estimates that small-scale noise (hereinafter referred to as "small noise") is generated in the vital signal when the large noise condition is not satisfied in the vital signal in the noise generation section. To do.

The large noise condition may be, for example, that the statistical value (for example, mean value, maximum value, median value, etc.) of the amplitude of the vital signal in the noise generation section is equal to or higher than a predetermined threshold value. The large noise condition may be that, for example, in the vital signal in the noise generation section, the interval of the predetermined waveforms appearing periodically does not satisfy the predetermined condition (for example, the predetermined waveform is not detected). Such a condition may be, for example, that the difference from the interval in a section other than the noise generation section is larger than a predetermined threshold value. Hereinafter, the large noise condition will be described by taking the case where the vital signal is electrocardiographic data as an example.

Generally, when the vital signal is electrocardiographic data, one or more waveforms of P wave, Q wave, R wave, S wave, T wave, and U wave are acquired from the vital signal. it can. When any one or more intervals of each wave are equal to or more than a predetermined threshold value, it may be determined that the large noise condition is satisfied. The large noise condition is that the difference between one or more intervals of each wave and the interval of each wave obtained from the same user's vital signal in a section other than the noise generation section is equal to or more than a predetermined threshold value. You may. In this case, for example, if the waveform of a part of each wave (for example, R wave) is obtained in a predetermined period even if the amplitude is deviated, it is regarded as noise (small noise) having a small noise scale. Detected. As described above, when the vital signal is electrocardiographic data, it can be seen that the reliability of the waveform is low because the period of each wave deviates from a predetermined condition. Such an unreliable waveform may be estimated as large noise. Further, when none of the waves is detected, it may be determined that the large noise condition is satisfied.

The correction unit 108 performs correction processing on the vital signal or vital information. The correction unit 108 records the corrected vital signal data in the vital signal storage unit 103. The correction unit 108 may overwrite the vital signal (vital signal before correction) acquired by the vital signal acquisition unit 102 with the vital signal after correction, or the vital signal after correction while leaving the vital signal before correction. The signal may be recorded separately. The correction unit 108 performs correction processing by a different method depending on the magnitude of noise. Hereinafter, each of the correction processing performed when the noise scale is large and the correction processing performed when the noise scale is small will be described.

(When the noise scale is large)
When the noise scale is large, the correction unit 108 performs correction processing (removal processing) so that the vital signal in the noise generation section is not used in the subsequent processing. For example, the correction unit 108 performs processing so that the vital signal in the noise generation section having a large noise scale is not used by the vital information acquisition unit 109 for acquisition of vital information. For example, when the vital information acquisition unit 109 acquires vital information by counting the number of predetermined waveforms (for example, R wave) in the vital signal, the correction unit 108 generates noise in the vital information acquisition unit 109. Instruct not to count the vital signals of the section. For example, the correction unit 108 may remove the vital signal in the noise generation section by replacing it with a straight line having zero amplitude.

(When the noise scale is small)
When the noise scale is small, the correction unit 108 estimates the correct vital signal in the noise generation section and replaces the vital signal in the noise generation section with the estimation result (signal replacement processing). The correction unit 108 may estimate the correct vital signal of the noise generation section based on, for example, one or both vital signals before and after the noise generation section. For example, the correction unit 108 may use a vital signal having the same time width as the noise generation section as an estimation result in the vital signal immediately before the noise generation section. At this time, the correction unit 108 may acquire the vital signal immediately before the noise generation section based on the reference position by using a part of the predetermined waveform that appears periodically as the reference position. For example, the vital signal at normal time is always learned (so that the correct vital signal can be created periodically), and in the noise generation section, the correct vital signal is estimated (pseudo-created) from the previously learned vital signal. You may. When the vital signal is an electrocardiographic waveform, one or a plurality of predetermined waves (P wave, Q wave, R wave, S wave, T wave and U wave) may be used as the reference position. This is the end of the description of the correction unit 108.

The vital information acquisition unit 109 acquires vital information based on the vital signal recorded in the vital signal storage unit 103. Vital information is information obtained by analyzing vital signals. The vital information is, for example, information regarding the heart rate and the section in which the R signal is detected (for example, the RR interval).

The vital information storage unit 110 is configured by using a storage device such as a magnetic hard disk device or a semiconductor storage device. The vital information storage unit 110 stores the vital information acquired by the vital information acquisition unit 109.

Next, the processing of the noise generation estimation unit 106 will be described more specifically. FIG. 2 is a diagram showing specific examples of vital signals and non-vital signals. The vertical axis of each signal in FIG. 2 indicates the amplitude of each signal, and the horizontal axis indicates the time. In FIG. 2, the times on the horizontal axis of each signal are the same. In FIG. 2, the waveform 901 shows the waveform of the vital signal, the waveform 902 shows the waveform of the body motion signal, and the waveform 903 shows the waveform of the vehicle motion signal. In the section T1 between the time t1 and the time t2, a large amplitude is generated in the waveform 902 of the body motion signal and the waveform 903 of the vehicle motion signal. As a result, the noise generation condition is satisfied in the section T1 of the waveform 902 and the waveform 903. Therefore, the noise generation estimation unit 106 estimates the section T1 as the noise generation section. Note that the noise generation estimation unit 106 may estimate as a noise generation section a section in which noise is detected in the non-vital signal and a predetermined section is added to either or both of the sections before and after the noise. Good.

Next, the processing of the noise scale estimation unit 107 and the correction unit 108 will be described more specifically. FIG. 3 is a diagram showing a specific example of a vital signal in which small noise is generated. FIG. 3 shows an electrocardiographic signal as a specific example of the vital signal. In FIG. 3, almost no noise is generated near the times t11 and t13, and small-scale noise is generated near t12. When the noise scale is small, one or a plurality of P wave, Q wave, R wave, T wave and U wave can be acquired from the vital signal. For example, in the example of FIG. 3, P wave and R wave can be detected from the vital signal near t12. In this way, when any one or more predetermined waves are detected, the noise scale estimation unit 107 estimates that the noise scale is small.

FIG. 4 shows a specific example of the vital signal corrected by the correction unit 108. In the example of FIG. 4, the correction unit 108 estimates the waveform of T12, which is a section near t12 estimated to be the noise generation section, as the waveform of the section of T11, which is a predetermined section immediately before. At this time, the section of T11 and T12 is determined with the time t11 and t12 when the R wave, which is a predetermined wave, is detected as the reference position. That is, the correction unit 108 replaces the waveform of T11 with the waveform of T12 so that the position of t11 overlaps with the position of t12.

FIG. 5 is a diagram showing a specific example of a vital signal in which a large amount of noise is generated. FIG. 5 shows an electrocardiographic signal as a specific example of the vital signal. In FIG. 5, almost no noise is generated near the times t21 and t23, and a large-scale noise is generated near t22. When the noise scale is large, none of the P wave, the Q wave, the R wave, the T wave, and the U wave can be acquired from the vital signal. In this way, when none of the predetermined waves is detected, the noise scale estimation unit 107 estimates that the noise scale is large.

FIG. 6 shows a specific example of the vital signal corrected by the correction unit 108. In the example of FIG. 6, the correction unit 108 replaces the waveform of T22, which is a section near t22 estimated to be a noise generation section, with a waveform having zero amplitude. For example, always learn the width of the vertical axis (heart action potential: mv in the case of ECG) and the horizontal axis (time: msec in the case of ECG) of vital signals, and exceed a certain threshold value from the peak value of the R wave. In that case, it may be recognized that it is clearly not an R wave, and the R wave may be deleted.
For example, a wave that is clearly different from the peak value of one or more predetermined waves (P wave, Q wave, R wave, S wave, T wave, and U wave) may be deleted.

Next, the processing of the vital information acquisition unit 109 will be described more specifically. The vital information acquisition unit 109 detects an R wave from a vital signal indicating the action potential of the heart, for example, based on a predetermined threshold value. The vital information acquisition unit 109 counts the number of times the R wave is detected (hereinafter referred to as “the number of times the R wave is detected”) each time the R wave is detected. For example, the vital information acquisition unit 109 increments the number of R wave detections by 1 each time the R wave is detected. The vital information acquisition unit 109 calculates the time difference between the time when the R wave is detected and the time when the R wave is detected next (hereinafter, referred to as “RR interval”).

FIG. 7 is a diagram for explaining a method of detecting an R wave in the vital information acquisition unit 109. FIG. 7 shows an electrocardiographic signal (vital signal) at a predetermined time. In FIG. 7, the vertical axis of the electrocardiographic signal represents the action potential of the heart, and the horizontal axis represents the time. As shown in FIG. 7, there are a plurality of electrocardiogram components (P wave, Q wave, R wave, S wave, and T wave) in the electrocardiographic signal. The vital information acquisition unit 109 detects the R wave based on the electrocardiographic signal and a predetermined threshold value. For example, when the value of the potential of the electrocardiographic signal acquired periodically becomes substantially the same as the threshold value, the vital information acquisition unit 109 detects the data of the action potential of the heart that becomes substantially the same as the threshold value as an R wave. At this time, the vital information acquisition unit 109 also detects the time at the time when the R wave is detected. In FIG. 7, the R wave is detected at the times indicated by points 15-1, 15-2 and 15-3. Further, after the R wave is detected at the time indicated by points 15-1, 15-2 and 15-3, it becomes substantially the same as the threshold value at the time indicated by points 16-1, 16-2 and 16-3. Data on the action potential of the heart is detected. However, the vital information acquisition unit 109 collects data on the action potential of the heart, which is detected between the time when the R wave is detected and the time when a certain time (for example, 200 milliseconds) elapses, which is substantially the same as the threshold value. It is not detected as an R wave. That is, the data of the action potential of the heart that became substantially the same as the threshold value at the time indicated by points 16-1, 16-2 and 16-3 is not detected as an R wave.

Generally, the RR interval is said to be about 500 milliseconds, so there is a high possibility that the data detected before a certain time (for example, 200 milliseconds) has elapsed is noise. Therefore, by the above-mentioned processing, it is possible to exclude noise that causes deterioration of accuracy by not detecting all the data of the action potential of the heart that is substantially the same as the threshold value as the R wave. As a result, the R wave can be detected with high accuracy.

FIG. 8 is a flowchart showing a specific example of the processing flow of the vital signal acquisition device 10. Hereinafter, the processing flow of the vital signal acquisition device 10 will be described with reference to FIG.
First, the vital signal acquisition unit 102 acquires the vital signal (step S101). The vital signal acquisition unit 102 records the acquired vital signal in the vital signal storage unit 103. Next, the non-vital signal acquisition unit 104 acquires the non-vital signal (step S102). The non-vital signal acquisition unit 104 records the acquired non-vital signal in the non-vital signal storage unit 105.

Next, the noise generation estimation unit 106 estimates the generation of noise in the vital signal based on one or a plurality of non-vital signals (step S103). When it is estimated that no noise is generated (step S104-NO), the process ends without any particular process being performed in that section. On the other hand, when it is estimated that noise is generated (step S104-YES), the noise scale estimation unit 107 estimates the noise scale in the noise generation section (step S105). When it is estimated that the noise scale is large (step S106-YES), the correction unit 108 performs a removal process (step S107). On the other hand, when it is estimated that the noise scale is small (step S106-NO), the correction unit 108 performs signal replacement processing (step S108). The process shown in FIG. 8 may be executed after the entire vital signal and non-vital signal have been acquired, or may be executed at a predetermined cycle in parallel with the process of acquiring the vital signal and non-vital signal. Good. In particular, in the latter case, the processes of steps S101 and S102 may be executed at independent timings in parallel with the processes of steps S103 and subsequent steps. In this case, the processes after step S103 may be executed at predetermined time width intervals.

The vital signal acquisition device 10 configured in this way can improve the accuracy of vital information. More specifically, it is as follows. Conventionally, a technique for removing noise generated in a vital signal when the amount of activity of the user is relatively small (at rest) has been proposed to some extent. On the other hand, no technique has been proposed for appropriately removing the noise generated in the vital signal when the user's activity is relatively large (during activity). In response to such a problem, the vital signal acquisition device 10 estimates the generation of noise with respect to the vital signal based on the non-vital signal that directly or indirectly indicates the magnitude of the user's activity. Therefore, even if it is difficult to accurately estimate the presence / absence of noise generation based only on the vital signal, the presence / absence of noise generation can be estimated more accurately based on the non-vital signal. Therefore, even if the user is active, by performing correction processing (removal of the vital signal in the noise part, estimation and replacement of the vital signal in the noise part, etc.) for the vital signal estimated to generate noise. Even if there is, it becomes possible to acquire vital signals and vital information more accurately.

(Modification example)
The noise generation estimation unit 106 may estimate the noise generation based on only a part of the non-vital signals among the plurality of non-vital signals. When noise generation is estimated in some non-vital signals among a plurality of non-vital signals, the noise generation estimation unit 106 may not estimate noise generation in other non-vital signals. , It may be estimated that noise has occurred.

The body motion sensor 30 and the vehicle sensor 40 in this embodiment are merely specific examples of the non-vital sensor. Other sensors may be applied to the vital signal acquisition system 100 as non-vital sensors. For example, instead of the vehicle sensor 40, an acceleration sensor provided on the aircraft (airplane, helicopter, etc.) on which the user is aboard may be used, or an acceleration sensor provided on the scaffold where the user is active may be used. May be used. That is, any sensor may be used as long as it is a sensor that can detect vibration that causes the user's body to move (for example, a moving body sensor that detects the movement of a moving body that moves the user).

The vital signal acquisition device 10 may be configured by using a plurality of computers. For example, the function of the vital signal acquisition device 10 may be implemented using a cloud system. The vital signal acquisition device 10 may be configured as a device that does not include the vital information acquisition unit 109 and the vital information storage unit 110. In this case, the vital signal acquisition device 10 may be configured as a device that provides the acquired vital signal to another information processing device.

Although the embodiments of the present invention have been described in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and includes designs and the like within a range that does not deviate from the gist of the present invention.

100 ... Vital signal acquisition system, 10 ... Vital signal acquisition device, 20 ... Vital sensor, 30 ... Body motion sensor, 40 ... Vehicle sensor, 101 ... Communication unit, 102 ... Vital signal acquisition unit, 103 ... Vital signal storage unit, 104 ... Non-vital signal acquisition unit, 105 ... Non-vital signal storage unit, 106 ... Noise generation estimation unit, 107 ... Noise scale estimation unit, 108 ... Correction unit, 109 ... Vital information acquisition unit, 110 ... Vital information storage unit

Claims (5)

A vital signal acquisition unit that acquires the user's vital signal from the vital sensor,
A non-vital signal acquisition unit that acquires a non-vital signal indicating a movement that causes noise of the vital signal from the non-vital sensor in the vital sensor.
A noise generation estimation unit that estimates whether or not noise has occurred in the vital signal based on the non-vital signal,
A correction unit that corrects the vital signal presumed to have generated the noise or the vital information obtained based on the vital signal presumed to have generated the noise.
A noise scale estimation unit that estimates the magnitude of noise in the vital signal,
With
The noise scale estimation unit is a predetermined one or a plurality of predetermined waves specific to the vital signal acquired from the vital signal in the section where noise is estimated by the noise generation estimation unit in the vital signal. is but if it is detected at intervals not exceeding a predetermined threshold is estimated as a scale of the noise is small, the scale of noise in the case where the wave of predefined specified is not detected at intervals not exceeding a predetermined threshold value Estimated to be large
The correction unit is a vital signal acquisition device that corrects by a different method according to the magnitude of the noise. When the noise scale estimation unit estimates that the noise scale is small, the correction unit uses the waveforms of other sections of the vital signal to detect the specified wave detected by the noise scale estimation unit. Make corrections according to the position of
The correction unit according to claim 1, wherein when the noise scale estimation unit estimates that the noise scale is large, the correction unit corrects by replacing the waveform of the vital signal in that section with a waveform having zero amplitude. Vital signal acquisition device. The vital sensor according to claim 1 or 2, wherein the non-vital sensor includes a body movement sensor that indicates a body movement that is the movement of the user's body, or a moving body sensor that indicates the movement of a moving body that moves the user. Signal acquisition device. The vital signal acquisition step of acquiring the user's vital signal from the vital sensor,
A non-vital signal acquisition step of acquiring a non-vital signal indicating a movement that causes noise of the vital signal from the non-vital sensor in the vital sensor,
A noise generation estimation step for estimating whether or not noise has occurred in the vital signal based on the non-vital signal, and
A correction step for correcting the vital signal presumed to have generated noise or vital information obtained based on the vital signal presumed to have generated noise.
A noise scale estimation step for estimating the noise magnitude in the vital signal, and
Have,
In the noise scale estimation step, one or a plurality of predefined waves specific to the vital signal acquired from the vital signal in the section where noise is estimated to be generated in the noise generation estimation step in the vital signal. is but if it is detected at intervals not exceeding a predetermined threshold is estimated as a scale of the noise is small, the scale of noise in the case where the wave of predefined specified is not detected at intervals not exceeding a predetermined threshold value Estimated to be large
In the correction step, a vital signal acquisition method in which correction is performed by a different method according to the magnitude of the noise. A computer program for operating a computer as the vital signal acquisition device according to any one of claims 1 to 3.

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