JP2007301175A - Bioelectric signal collecting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To collect biosignals without imposing a strain on a subject. <P>SOLUTION: A biosignal collecting device 1 has surface electrodes 11-13, which are respectively provided on a part to abut on a backside, from a lumbar part to a buttock, and a femoral part of the subject. The surface electrodes 11-13 detect electrode signals to show a heartbeat and a breathing of the subject when the subject is seated in a chair with its clothes. A biosignal detecting part 31 detects the biosignal from the electrode signal detected by each of the surface electrodes 11-13. A computer 44 of a signal processing part 41 separates an electrocardiographic signal as a biosignal to show the heartbeat of the subject and a breathing signal as a biosignal to show the breathing of the subject from the biosignals detected by the biosignal detecting part 31. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a bioelectric signal collecting apparatus.

  Conventionally, a bioelectric signal collection, such as an electrocardiograph, that takes out the active current due to the excitement of the subject's myocardium as a spatially and temporally synthesized potential change and collects the difference signal as a bioelectric signal The device is known. However, with a normal bioelectric signal collecting device, a fixed electrode must be applied to the subject during the examination, and skin may come into contact with the electrode paste or adhesive, which may cause irritation. This is a burden for the examiner.

For this reason, a bioelectric signal collecting apparatus in which a flexible conductive portion is formed in a part of the clothes so as not to be a burden on the subject and the clothes are put on the subject to take out bioelectric signals. Yes (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 11-128187 (page 3, FIGS. 1, 3)

  However, in the conventional bioelectric signal collecting apparatus, the subject has to take off his clothes and change into this special clothing, which is also troublesome for the subject and burdens the subject. It will be tough. Moreover, since a subject is restrained by the electric wire cable of a test | inspection apparatus at the time of a test | inspection, a mental burden is given to a test subject.

  The present invention has been made in view of such conventional problems, and an object thereof is to provide a bioelectric signal collecting apparatus capable of collecting bioelectric signals without imposing a burden on a subject. To do.

In order to achieve this object, a bioelectric signal collecting apparatus according to the first aspect of the present invention includes:
A chair on which the subject sits;
A plurality of surface electrodes that are attached to the chair and detect a potential signal emitted from each part of the subject seated on the chair;
And a bioelectric signal detector that detects a bioelectric signal of the subject by amplifying a difference signal between potential signals detected by the surface electrodes.

  The plurality of surface electrodes may be covered with a non-conductive sheet.

  In the chair, the plurality of surface electrodes may be arranged at least at the back of the subject, at a position where the hip, the hip, and the thigh contact.

  The bioelectric signal detection unit may amplify a difference signal of potential signals detected by other surface electrodes, using any one of the plurality of surface electrodes as a neutral point electrode.

  The bioelectric signal detection unit may be provided on the back of the chair.

  You may make it provide the signal processing part which performs the signal processing with respect to the bioelectric signal which the said bioelectric signal detection part detected.

  The signal processing unit obtains at least a bioelectric signal indicating heartbeat of the subject and a bioelectric signal indicating breathing of the subject from the bioelectric signal detected by the bioelectric signal detection unit. You may do it.

  You may make it provide the display part which displays the bioelectric signal which the said signal processing part processed.

  You may make it provide the transmitter which transmits the bioelectric signal which the said signal processing part acquired.

  The signal processing unit compares the signal level of the bioelectric signal detected by the bioelectric signal detection unit with a preset abnormality determination value, and determines whether the subject is abnormal based on the comparison result. When it is determined that there is an abnormality, an abnormality determination signal may be output.

The chair is a driver's chair mounted on an automobile,
The plurality of surface electrodes are attached to the driver chair,
The signal processing unit may determine whether or not the driver has an abnormality with the driver of the automobile as a subject, and output an abnormality determination signal when determining that there is an abnormality.

The driver's chair has an armrest;
Any one of the surface electrodes is attached to the armrest of the driver's chair as a neutral point electrode,
The bioelectric signal detection unit acquires a potential of a steering wheel of the automobile as a neutral point potential via the driver and a neutral point electrode, and detects a potential signal detected by each surface electrode other than the neutral point electrode. The bioelectric signal of the subject may be detected by amplifying the difference signal.

The chair is installed in a place where sensory stimulation is given to the subject,
The signal processing unit is supplied with sensory information related to sensory stimulation given to the subject, and changes in the bioelectric signal detected by the bioelectric signal detection unit when stimulation is given to the subject. Detection may be performed, and based on the sensory information and a change in the bioelectric signal, relation information indicating a relation between sensory stimulation given to the subject and the reaction of the subject may be acquired. .

  According to the present invention, bioelectric signals can be collected without imposing a burden on the subject.

Hereinafter, a bioelectric signal collecting apparatus according to an embodiment of the present invention will be described with reference to the drawings.
The configuration of the bioelectric signal collecting apparatus according to this embodiment is shown in FIGS. 1 and 2. Hereinafter, “bioelectric signal” is referred to as “biological signal”.
The biological signal collection device 1 according to the present embodiment includes a chair 2 (FIG. 2), surface electrode groups 11 to 13, switches 21 to 23, a biological signal detection unit 31, and a signal processing unit 41.

  The surface electrode groups 11 to 13 are composed of surface electrodes 11-1 and 11-2, surface electrodes 12-1 and 12-2, and surface electrodes 13-1 and 13-2, respectively. As shown in FIG. 2, the surface electrodes 11-1 and 11-2, the surface electrodes 12-1 and 12-2, and the surface electrodes 13-1 and 13-2 are attached to each part of the chair 2 and are seated on the chair. This is for detecting a potential signal emitted from each part of the subject.

  The chair 2 is for a subject to be seated when collecting a biological signal, and the subject sits on the chair 2 while wearing clothes when collecting the biological signal.

  The surface electrodes 11-1 and 11-2 are attached to the chair 2 at positions where the subject's back contacts. The surface electrodes 12-1 and 12-2 are attached to the chair 2 at positions where the buttocks abut from the waist of the subject. The surface electrodes 13-1 and 13-2 are attached to the chair 2 at positions where the subject's thighs abut.

  The surface electrode 11-1 is made of a conductive metal conductor, a conductive cloth, or a conductive liquid. The size of the surface electrode 11-1 is larger than that of the subject's heart, and is formed by densely knitting copper wires so as to have a size of, for example, 100 mm × 200 mm × 0.1 mm. The surface electrode 11-2, the surface electrodes 12-1 and 12-2, and the surface electrodes 13-1 and 13-2 are the same as the surface electrode 11-1.

  The surface electrodes 11-1 and 11-2, the surface electrodes 12-1 and 12-2, and the surface electrodes 13-1 and 13-2 detect the heartbeat and respiration of the subject as potential signals, respectively. To do.

  In the surface electrodes 11-1 and 11-2, the surface with which the subject's back comes into contact is covered with a high dielectric constant film.

  Further, the surface electrodes 11-1, 11-2, 12-1, 12-2, 13-1, and 13-2 are covered with a non-conductive sheet so as not to be a burden on the examinee. The person is not in direct contact (non-contact).

  And when a subject sits on the chair 2, the sheet | seat which covers a subject's clothes and the surface electrode groups 11-13 becomes an electrical capacity, and a subject and the surface electrode groups 11-13 are electricity. Connected.

  Returning to FIG. 1, the switches 21 to 23 select potential signals detected by the surface electrodes 11-1 and 11-2, the surface electrodes 12-1 and 12-2, and the surface electrodes 13-1 and 13-2, respectively. Is to do.

  The biological signal detection unit 31 detects a biological signal from the potential signals detected by the surface electrode groups 11 to 13 and includes operational amplifiers 32 to 34.

  The operational amplifiers 32 to 34 are for detecting a biological signal of the subject by amplifying a difference signal between the potential signals detected by the surface electrode groups 11 to 13. For the operational amplifiers 32 to 34, for example, an amplifier having a high input impedance of about 10 12 Ω is used in order to obtain signals efficiently and to improve the SN ratio.

  The operational amplifiers 32 and 33 are provided to improve the frequency characteristics of the acquired potential signal, and are each configured by a voltage follower. That is, the output terminals of the operational amplifiers 32 and 33 are connected to the-terminal, and the potential signal from the surface electrode 11-1 or 11-2 and the potential signal from the surface electrode 13-1 or 13-2 are connected to the + terminal. Supplied. The output terminals of the operational amplifiers 32 and 33 are connected to the negative terminal and the positive terminal of the operational amplifier 34, respectively.

  The operational amplifiers 32 and 33 are provided on the rear surfaces of the surface electrode groups 11 and 13, respectively, in order to prevent noise from being mixed.

  The operational amplifier 34 amplifies a difference signal between the output signal of the operational amplifier 32 and the output signal of the operational amplifier 33. The operational amplifier 34 is supplied with the potential of the neutral point electrode as the neutral point potential, using the surface electrode 12-1 or 12-2 as the neutral point electrode.

  Thus, in this embodiment, in order to remove noise and stabilize the potential signal between the surface electrode 11-1 or 11-2 and the surface electrode 13-1 or 13-2, the surface electrode 12-1 or The neutral point electrode by 12-2 is attached to the chair 2 independently of the surface electrodes 11-1, 11-2, 13-1, 13-2.

  The biological signal detection unit 31 supplies the signal amplified by the operational amplifier 34 to the signal processing unit 41.

  The signal processing unit 41 is for processing the signal supplied from the operational amplifier 34, and includes an amplification circuit 42, an A / D conversion circuit 43, and a computer 44.

  The amplification circuit 42 is for amplifying the signal supplied from the biological signal detection unit 31.

  The A / D conversion circuit 43 is for converting the analog signal amplified by the amplifier circuit 42 into a digital signal.

  The computer 44 includes a central processing unit (CPU), a read only memory (ROM), a random access memory (RAM), a hard disk drive (HDD), and the like (all not shown), and is converted by the A / D conversion circuit 43. The digital signal is processed.

  Specifically, the computer 44 controls the switching of the switches 21 to 23 to control the switching from the surface electrode 11-1 or 11-2, the surface electrode 12-1 or 12-2, and the surface electrode 13-1 or 13-2. Select the potential signal.

  The computer 44 also discriminates an electrocardiogram signal as a biological signal indicating the heartbeat of the subject and a respiratory signal as a biological signal indicating respiration included in the digital signal supplied from the A / D conversion circuit 43. Then, at least these two biological signals are acquired.

  FIG. 3 shows the waveform of an electrocardiogram signal. This biological signal is a weak signal that flows when the heart muscle contracts or expands, and this signal includes P waves, Q waves, R waves, S waves, and T waves.

  The P wave is a wave generated by the action potential propagating through the atrium. Q wave, R wave, and S wave are waves generated by action potentials generated in ventricular muscles. The T wave is a wave generated when the action potential of the ventricle disappears.

  The interval between the R wave and the R wave is one cycle, and the number of cycles in 60 seconds is the heart rate.

  FIG. 4 shows the respiration signal of the subject. The computer 44 separates these two biological signals by performing frequency analysis.

  Specifically, the frequency of the respiration signal of the subject is less than 0.5 Hz, and the frequency of the electrocardiogram signal is 0.5 Hz to 80 Hz. For this reason, the computer 44 sets 0.5 Hz as a threshold value and stores the threshold value in an HDD or the like in advance.

  Then, the computer 44 separates the two biological signals using a biological signal having a frequency lower than the threshold as a breathing signal of the subject and a biological signal having a frequency higher than the threshold as an electrocardiographic signal. The signal processing unit 41 outputs the two biological signals separated by the computer 44.

Next, the operation of the biological signal collecting apparatus 1 according to this embodiment will be described.
When the subject sits on the chair 2, the surface electrodes 11-1 and 11-2, the surface electrodes 12-1 and 12-2, and the surface electrodes 13-1 and 13-2 are potential signals generated from the subject. Is detected.

  The computer 44 controls switching of the switches 21 to 23 to select a potential signal from the surface electrode 11-1 or 11-2, the surface electrode 12-1 or 12-2, and the surface electrode 13-1 or 13-2. To do.

  For example, when the computer 44 selects the surface electrode 11-1, the surface electrode 12-1, and the surface electrode 13-1, the operational amplifiers 32 and 33 are detected by the surface electrode 11-1 and the surface electrode 13-1, respectively. The potential signal is amplified and supplied to the negative terminal and the positive terminal of the operational amplifier 34.

  The operational amplifier 34 amplifies the difference signal between the potential signals supplied from the operational amplifiers 32 and 33 using the potential of the surface electrode 12-1 as a neutral point potential. The biological signal detection unit 31 supplies the signal processing unit 41 with the signal amplified by the operational amplifier 34.

  The amplification circuit 42 of the signal processing unit 41 amplifies the signal supplied from the biological signal detection unit 31, and the A / D conversion circuit 43 converts the analog signal into a digital signal.

  The computer 44 discriminates the electrocardiogram signal shown in FIG. 3 and the respiratory signal shown in FIG. 4 included in the digital signal by performing frequency analysis, and separates and outputs these biological signals.

  FIG. 5A shows an electrocardiogram obtained in a state where electrodes are directly attached to the skin of the subject as in a normal electrocardiogram examination. FIG. 5B shows an electrocardiogram obtained when an examinee is seated on the chair 2 shown in FIG. 2 while wearing clothes and an electrocardiogram is performed. Both biological signals are examined and collected at the same time, and both time axes correspond to each other.

  Comparing FIGS. 5A and 5B, it is determined that even if the user wears clothes and sits on the chair 2 shown in FIG. The

  As described above, according to the present embodiment, the surface electrode groups 11 to 13 are attached to the chair 2, and the biological signal detection unit 31 uses the potential signals of the subject acquired by the surface electrode groups 11 to 13. Based on this, a biological signal is detected.

  Therefore, the subject can take an examination without taking off the clothes, and even when the subject is wearing clothes, the biological signal is detected without directly contacting the electrode with the body and skin. be able to. For this reason, biological signals can be collected without imposing a burden on the subject.

  Moreover, since the chair 2 is used as a holder for the subject, the biological signals of the subject can be collected in a state close to daily life without laying the subject on its side. In addition, since the surface electrode 11-1 and the like are covered with a non-conductive sheet and are not in direct contact (non-contact) with the subject, the biological signal can be applied without further burdening the subject. Can be collected.

  Moreover, since the neutral point electrode by the surface electrode 12-1 or 12-2 is attached to the chair 2 independently of the surface electrodes 11-1, 11-2, 13-1, 13-2, Noise superimposed on the signal can be removed, and the potential signal detected by the surface electrode 11-1 or 11-2 and the surface electrode 13-1 or 13-2 can be stabilized.

In carrying out the present invention, various forms are conceivable and the present invention is not limited to the above-described embodiment.
For example, the configuration of the surface electrode groups 11 to 13 and the biological signal detection unit 31 is not limited to the configuration illustrated in FIG. 1, and may be the configuration illustrated in FIGS. 6 to 8.

  FIG. 6 shows a configuration of the biological signal detection unit 31 when detecting a biological signal based on a difference signal between the potential signal of the surface electrode group 11 and the potential signal of the surface electrode group 12.

  The surface electrodes 11-1 and 11-2 are connected to the + terminal of the operational amplifier 32. The surface electrodes 12-1 and 12-2 are connected to the + terminal of the operational amplifier 33. The operational amplifier 34 is applied with the potentials of the surface electrodes 13-1 and 13-2 as neutral point potentials.

  With this configuration, the biological signal detection unit 31 uses the potential signal emitted from the subject's thigh as a neutral point potential, and the potential signal emitted from the subject's back and the waist and buttocks. A biological signal is detected on the basis of a difference signal from the potential signal. In this way, since the subject's thigh is away from the heart and lungs, the neutral point potential is less likely to be affected by the heartbeat and respiration.

  FIG. 7 shows the configuration of the biological signal detection unit 31 when a biological signal is detected based on the difference signal between the potential signal of the surface electrode 11-1 and the potential signal of the surface electrode 11-2.

  The surface electrode 11-1 is connected to the + terminal of the operational amplifier 33, and the surface electrode 11-2 is connected to the + terminal of the operational amplifier 32. The operational amplifier 34 is applied with the potentials of the surface electrodes 12-1 and 12-2 and the surface electrodes 13-1 and 13-2 as neutral point potentials.

  With this configuration, the biological signal detection unit 31 uses the potential signal generated from the thigh and waist of the subject as the neutral point potential, and the signal of the potential signal generated from the left and right of the subject's back. A biological signal is detected based on the level difference. In this way, a potential signal can be detected from the vicinity of the subject's heart and lungs, and a biological signal having a high signal level can be extracted.

  FIG. 8 shows the configuration of the biological signal detection unit 31 when a biological signal is detected based on the difference signal between the potential signal of the surface electrode 11-2 and the potential signal of the surface electrode 12-1.

  The surface electrode 11-2 is connected to the + terminal of the operational amplifier 32, and the surface electrode 12-1 is connected to the + terminal of the operational amplifier 33. In addition, the potential of the surface electrodes 13-1 and 13-2 is applied to the operational amplifier 34 as a neutral point potential.

  With this configuration, the biological signal detection unit 31 uses the potential signal emitted from the subject's thigh as a neutral point potential, and the potential signal emitted from the left of the subject's back and the waist to the buttocks. The biological signal is detected based on a difference signal between the generated potential signal and the potential signal.

  In this way, the signal level of the potential signal due to the heartbeat of the subject increases. For this reason, this configuration is effective when giving priority to the acquisition of the electrocardiographic signal of the subject.

  Furthermore, the biological signal collection device 1 can be configured to select a configuration as illustrated in FIGS. 6 to 8 using the switches 21 to 23.

  In addition, the biological signal collecting apparatus 1 can include a display device 51 as shown in FIG.

The display device 51 has a display or the like, is connected to the signal processing unit 41, and displays a biological signal generated by the signal processing unit 41.
In this way, the state of the subject can be visually monitored.

  Moreover, the biological signal collection device 1 can also include a wireless transmitter 61 as shown in FIG. The wireless transmitter 61 is connected to the signal processing unit 41 and transmits a biological signal generated by the signal processing unit 41 by radio waves.

  The biological signal collection device 1 is installed in a subject's residence, for example, and the chair 2 is a chair of a household dining table or a living room. The medical institution 63 includes a wireless receiver 62 and receives a radio signal from the wireless transmitter 61. Thereby, the medical institution 63 can monitor the biological signal of the subject at a place away from the subject.

  For this reason, the medical institution 63 can monitor the cardiac function while the subject is living, can monitor the state of the elderly living alone, etc. on a daily basis, and is useful for home health management. Further, if the medical institution 63 is provided with an alarm control device (not shown), it can also determine an abnormality of the subject and issue an alarm.

  In this case, for example, the alarm control device determines abnormality by comparing the heart rate with a preset abnormality determination value. When the heart rate of the subject exceeds the abnormality determination value, the alarm control device issues an alarm. The alarm control device includes a memory (not shown), and stores an abnormality determination value in this memory in advance.

  With such a configuration, QOL (Quality Of Life) of elderly people and the like can be increased.

  The wireless transmitter 61 may be a mobile phone, a mobile terminal, or a PHS (Personal Handy-phone System) (not shown). In this case, a connection connector is provided in the mobile phone, the mobile terminal, or the PHS, and the signal processing unit 41 and the mobile phone, the mobile terminal, or the PHS are connected via the connection connector.

  In addition, as shown in FIG. 11, the biological signal collecting apparatus 1 can be configured to monitor the state of the driver 72 of the automobile 71. In this case, the biological signal collecting device 1 is mounted on the automobile 71 and the surface electrode groups 11 to 13 are attached to the driver's chair 73.

  In this case, the chair 73 is a chair with an armrest, and the surface electrodes 12-1 and 12-2 are attached to the armrest as neutral point electrodes.

  Then, the biological signal detection unit 31 acquires the potential of the handle of the automobile 71 as a neutral point potential via the driver 72 and the surface electrodes 12-1 and 12-2 as neutral point electrodes. The biological signal detection unit 31 uses the driver 72 as the subject, and amplifies the difference signal between the potential signals detected by the surface electrodes 11-1, 11-2, 13-1, and 13-2, thereby driving the driver 72. The biological signal is detected.

  The computer 44 of the signal processing unit 41 determines whether or not the driver 72 has an abnormality based on the biological signal of the driver 72 detected by the biological signal detection unit 31.

  For example, when the driver's 72 consciousness is lowered, the heart rate changes. The computer 44 detects the change in the heart rate. When the change in the heart rate exceeds a preset abnormality determination value, the computer 44 determines that the driver 72 is abnormal and outputs an abnormality determination signal S1.

  Assuming that the automobile 71 includes the brake control unit 74, the brake control unit 74 controls the brake 75 to decelerate the automobile 71 when the abnormality determination signal S <b> 1 is supplied from the biological signal collection device 1.

  Thus, the safety of the automobile 71 can be improved by controlling the brake 75 based on the biological signal. In addition, since the steering wheel potential of the automobile 71 is acquired as a neutral point potential, the noise can be efficiently removed from the biological signal in the automobile 71 having a lot of noise.

  The chair electrode 73 may not be an armchair, and the surface electrode surfaces 12-1 and 12-2 may be directly attached to the handle to serve as neutral point electrodes, or the surface electrode group separately from the surface electrode groups 11-13. The surface electrode group may be attached to the handle.

  In addition, as shown in FIG. 12, the biological signal collecting apparatus 1 has a theater viewer, a stadium viewer, a user of an amusement park playground equipment, and a user of a game machine for a game center as subjects. It is also possible to monitor the response (psychological state) to the sensory stimulus given to the examiner.

  In this case, the biological signal collecting apparatus 1 is installed in a place where sensory stimulation is given to the subject such as a theater, a stadium, an amusement park playground equipment, or a game machine for a game center. The chair 2 is used as a chair for a theater, a stadium, an amusement park playground equipment, or a game machine for a game center, and the surface electrode groups 11 to 13 are incorporated in the chair 2.

  In addition, scene information is supplied to the computer 44 of the signal processing unit 41. This scene information is information indicating each scene in theatrical screening work, sports, amusement park playground equipment, and game software, and is also sensory information related to sensory stimulation given to the subject.

  The computer 44 acquires an electrocardiogram signal as a biological signal and detects a change in heart rate.

  As shown in FIG. 13, when the subject's heart rate changes to ac in scenes A to C, the computer 44 is supplied with the scenes A to C as scene information, and the amount of change. a to c are detected.

  The computer 44 acquires relation information between the sensory stimulus given to the subject and the reaction of the subject at that time based on the scene information and the change amounts a to c.

  That is, when the scenes A to C are supplied as the scene information, the computer 44 obtains the heart rate change amounts a to c, respectively, and determines the level for the heart rate change amounts a to c. I do.

  The computer 44 determines that the heart rate change a in the scene A is level 1, the heart rate change b in the scene B is level 3, and the heart rate change c in the scene c is level 2.

  The computer 44 performs level determination in this way, and the biological signal collection device 1 acquires this result as related information and outputs this result as an evaluation result.

  By feeding back such evaluation results to theatrical movies, sports, amusement park playground equipment, and game center game machines, for example, game machine scenes can be developed in accordance with the ability of game players, and playground equipment movements can be controlled. You can do it. Thereby, a more advanced man-machine interface can be constructed.

  Moreover, in the said embodiment, the biological signal was demonstrated as a subject's electrocardiogram signal and a respiration signal. However, the biological signal is not limited to this, and may be, for example, a biological signal indicating an electroencephalogram or a myoelectric signal emitted from a muscle.

  In the case of the myoelectric signal, the frequency is usually a value exceeding 80 Hz and a value of 1 kHz or less. Accordingly, the computer 44 sets the threshold value to 80 Hz and separates the myoelectric signal from the electrocardiographic signal and the respiratory signal. In this case, the computer 44 stores the threshold value of 80 Hz in advance in an HDD or the like.

It is a block diagram which shows the structure of the biosignal collection apparatus which concerns on embodiment of this invention. It is a figure which shows the chair in which the some surface electrode shown in FIG. 1 was integrated. It is a wave form diagram of the electrocardiogram signal which shows the heartbeat as a subject's biological signal. It is a wave form diagram of a respiration signal which shows respiration as a living body signal of a subject. It is the waveform diagram of the electrocardiogram signal obtained by the electrocardiogram examination, (a) shows the waveform of the electrocardiogram signal at the time of normal electrocardiogram examination, (b) is sitting on the chair with clothes on The waveform of an electrocardiogram signal when an electrocardiogram is performed is shown. It is a figure which shows the connection example (1) of a surface electrode. It is a figure which shows the connection example (2) of a surface electrode. It is a figure which shows the connection example (3) of a surface electrode. It is a figure which shows the structure of the biosignal collection apparatus provided with the display apparatus. It is a figure which shows the structure of the biosignal collection apparatus provided with the wireless transmitter. It is a figure which shows the structure at the time of mounting a biological signal collection apparatus in a motor vehicle. It is a figure which shows the biomedical signal collection device which supplies scene information and outputs an evaluation result. It is a figure which shows operation | movement of the biosignal collection apparatus shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Biological (electrical) signal collection device 2 Chair 11-13 Surface electrode group 21-23 Switch 31 Biosignal detection part 41 Signal processing part 51 Display apparatus 61 Wireless transmitter 71 Automobile

Claims (13)

A chair on which the subject sits;
A plurality of surface electrodes that are attached to the chair and detect a potential signal emitted from each part of the subject seated on the chair;
A bioelectric signal detection unit that detects a bioelectric signal of the subject by amplifying a difference signal between potential signals detected by the surface electrodes;
A bioelectric signal collecting device. The plurality of surface electrodes are covered with a non-conductive sheet.
The bioelectric signal collecting apparatus according to claim 1. The plurality of surface electrodes are arranged at a position where at least the back surface of the subject, the hips, the buttocks, and the thighs in the chair,
The bioelectric signal collecting apparatus according to claim 1, wherein the bioelectric signal collecting apparatus is a bioelectric signal collecting apparatus. The bioelectric signal detection unit amplifies a difference signal between potential signals detected by other surface electrodes, using any one of the plurality of surface electrodes as a neutral point electrode.
The bioelectric signal collecting device according to any one of claims 1 to 3, wherein The bioelectric signal detection unit is provided on the back of the chair.
The bioelectric signal collecting device according to any one of claims 1 to 4, wherein A signal processing unit that performs signal processing on the bioelectric signal detected by the bioelectric signal detection unit;
The bioelectric signal collecting device according to claim 1, wherein the bioelectric signal collecting device is a bioelectric signal collecting device. The signal processing unit obtains at least a bioelectric signal indicating heartbeat of the subject and a bioelectric signal indicating breathing of the subject from the bioelectric signal detected by the bioelectric signal detection unit. ,
The bioelectric signal collecting apparatus according to claim 6. A display unit for displaying the bioelectric signal processed by the signal processing unit;
The bioelectric signal collecting apparatus according to claim 6 or 7, A transmitter for transmitting the bioelectric signal acquired by the signal processing unit;
The bioelectric signal collecting apparatus according to claim 6, wherein the bioelectric signal collecting apparatus is a bioelectric signal collecting apparatus. The signal processing unit compares the signal level of the bioelectric signal detected by the bioelectric signal detection unit with a preset abnormality determination value, and determines whether the subject is abnormal based on the comparison result. When an abnormality is determined, an abnormality determination signal is output.
The bioelectric signal collecting apparatus according to any one of claims 6 to 9, The chair is a driver's chair mounted on an automobile,
The plurality of surface electrodes are attached to the driver chair,
The signal processing unit, with the driver of the automobile as a subject, determines the presence or absence of an abnormality of the driver, and outputs an abnormality determination signal when it is determined that there is an abnormality.
The bioelectric signal collecting device according to claim 10. The driver's chair has an armrest;
Any one of the surface electrodes is attached to the armrest of the driver's chair as a neutral point electrode,
The bioelectric signal detection unit acquires a potential of a steering wheel of the automobile as a neutral point potential via the driver and a neutral point electrode, and detects a potential signal detected by each surface electrode other than the neutral point electrode. Detecting the subject's bioelectric signal by amplifying the difference signal;
The bioelectric signal collecting apparatus according to claim 11. The chair is installed in a place where sensory stimulation is given to the subject,
The signal processing unit is supplied with sensory information related to sensory stimulation given to the subject, and changes in the bioelectric signal detected by the bioelectric signal detection unit when stimulation is given to the subject. Detecting, based on the sensory information and the change in the bioelectric signal, to obtain relationship information indicating a relationship between the sensory stimulus given to the subject and the response of the subject;
The bioelectric signal collecting apparatus according to any one of claims 6 to 12,