JPH07204169A - Device for detecting information on living body and its applied apparatus - Google Patents

Abstract

PURPOSE:To exactly, easily and simply detect GSR information which is usable for a lie detector by composing this device of a GSR detecting means, a brain wave detecting means and a mute detecting means. CONSTITUTION:The GSR information detected from a GSR information detecting electrode is inputted via coupling capacitors C2, C3 to a high-input impedance equiv. differential amplifier 10 and is passed through a BPF 5 for filtering a frequency of 0.1 to 1Hz, then through a buffer amplifier 5 and an analog switch 13, by which the information is made into GSR information detection output. On the other hand, the brain wave detecting means emits light by an IR light emitting diode 25 from an IR light emitting diode driving circuit 14, receives the reflected waves from a fingertip by an IR light detecting phototransistor 26 and supplies one thereof to a brain wave display device 21 and the other to a full wave current rectifier circuit 18. The full wave current rectification signal is inputted to a comparator 19, from which the signal is outputted as a control signal to the analog switch 13. At this time, the switch 13 is shut off by the comparator 19 to mute the GSR signal if the control signals has the value larger than the reference value for comparison.

Description

Detailed Description of the Invention

[0001]

[0001]

[0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a biological information detecting device and its applied equipment, and more particularly, to biological information which eliminates detection errors in pulse wave and GSR (Galvanic Skin Response) detection which are physiological sensors of the human body. The present invention relates to a detection device and a lie discovery machine to which GSR information which is accurate biometric information by the biometric information detection device is applied.

[0003]

[0002]

[0004]

2. Description of the Related Art Conventionally, the state of the human body's biological skin changes in its electrical conductance and electric potential during normal times and when it is strained. In the former case, the skin conductance level (SCL: Skin Condu
ctance Level,) and skin resistance level (SRL: Skin R
It is used as an esistance level), and when making a loud noise, mental arithmetic, or listening to emotional words, the current flowing in the human body, which was about 80 μA, temporarily shows 90 μA. It becomes an electric current. That is, SCL and SRL transiently increase at the latency of 1 to 2 s when the stimulus is applied (resistance decreases, and a large amount of current flows), and soon returns to a value close to the original level. This transient change is referred to as the skin conductance response (SCR: Skin
ConductanceResponce), skin resistance (SRR: Skin Re
sistance Responce). These SCL and SCR are collectively referred to as skin conductance change (SCC: Skin Condu
ctanceChange), and SRL and SRR are collectively referred to as skin resistance change (SRC). When this value is measured by alternating current, the skin impedance level (SZL: Skin Impedance Leve
l), skin impedance reaction (SZR: Skin Impedanc)
e Responce, unit is Ω), and skin admittance level (SYL: Skin Admttance Level), skin admittance response (SYR: Skin Admittance Responce, unit is S).

[0005]

Next, the latter change in the potential is measured by a so-called potential method (Endosomatic method), and the potential difference of the skin potential level (SPL: Skin Potential Level) is obtained by separating a pair of electrodes from a part of the human body. It changes when worn and stimulated. This change is referred to as skin potential response (SPR: Sk
in Potential Responce), this SPL and SPR
And skin potential activity (SPA: Skin Potential A
ctivity).

In addition, the electrodermal level (EDL) is not limited to the energization method and the electric potential method, and the level is generally summarized.
These are collectively referred to as electrodermal activity (EDA: El
ectrodermal Activity).

[0007]

Here, the energization method may be a simple device and has been used for a long time. An example of this is shown in Figure 1. The detection electrodes 2 and 3 are provided at the fingertips of the human hand 1, and a high resistance R1
A weak current is caused to flow through the electrodes 2 and 3 via the, and the current change is input to the amplifier 4 via the DC cut capacitor C1. The output of the amplifier 4 is passed through a buffer amplifier 6 to remove noise components by a BPF 5 of 0.1 to 1 Hz and does not affect the signal processing in the subsequent stage, and GSR (Galvanic Skin).
Responce) Detection signal is obtained. This GSR signal information means a biometric information signal in EDA.

[0008]

Therefore, since the skin conductance SC of the minute current to the human body changes from normal to tension, the change is detected as a GSR signal.

However, in this method, although a current is weakly applied to the human body, even if the constant current method is used, there are various problems in terms of physicochemical, electrical, and physiological conditions. Not a preferred measurement method.

On the other hand, the electric potential method, even though it is not so much as an electroencephalogram or an electromyogram, is a weak electric potential change due to the inactivation treatment of the reference electrode attachment site, the selection of good electrodes and electrode electrolytes, and the treatment of polyphasic waveforms. Can be accurately detected to a considerable extent.

[0011]

An example of this measurement is shown in FIG. Electrodes 7, 8 and 9 are respectively provided on the index finger, the middle finger and the ring finger of the hand 1 of the human body, and the electrode 8 of the middle finger is grounded to remove ham interference,
Coupling capacitors C2 and C3 which are DC component blocking capacitors
The potentials of the electrodes 7 and 9 of the index finger and the ring finger are detected by the high input impedance balanced differential amplifier 10 via the, and the output of the high input impedance balanced differential amplifier 10 of the difference is set to the BPF 5 of 0.1 to 1 Hz. Remove the noise component,
The buffer amplifier 6 so that it does not affect the signal processing in the subsequent stage.
Through, a GSR (Galvanic Skin Responce) detection signal is obtained.

[0012]

Here, as an electrode insertion method for measuring the skin potential, a fixing method using a double-sided adhesive tape as shown in FIG.
(2) There are methods for binding and fixing with medical aid tapes or belts, and (3) pressing method by vertically moving the electrode part as a movable device. Some electrodes are devised using Ag-AgCl electrodes. A method of reducing the potential difference of the electrode itself by using NaCl or KCl for the paste has been devised. Also, there are hands, feet, heads, etc. at the electrode insertion site, and the hands can be variously changed depending on the measurement conditions such as the ball of the thumb or the ball of the little finger, or the base node, middle node, end node of the fingertip. Therefore, the change in skin potential during normal times and tension is dropped to the ground electrode of the middle finger, and the potential (about 10 mV) of the electrodes 7 and 9 of the index finger and the ring finger is received by the differential amplifier 10, and the meter, recording paper, etc. Can be observed at. Here, regarding the position of the electrode, even if the middle segment of the middle finger is dropped to the ground and the GSR signal information is obtained from the end segment of the middle finger and the end segment of the index finger, almost the same information is obtained, It was found that if the middle node is also brought into contact, instability occurs in that contact, which is not a favorable situation.

[0013]

However, in the above method, if the skin of the fingertip is not in good contact with the detection electrode, erroneous detection occurs, so that it is possible to determine whether the detected data is true biological information or abnormal information due to poor contact. It is uncertain, and in order to remove this uncertainty, it is necessary to firmly fix the electrodes and fingertips with the above-mentioned (2) tie-fixing method using a medical auxiliary tape or the like, or a belt, which is the GSR information. It was extremely bad to use for measuring. Also, (3)
There is a pressing method by vertically moving the electrode part as a movable device, but this is also expensive, and erroneous detection may occur depending on the pressing part such as the joint part of the middle segment and the end segment. In addition, it can also be used for applied equipment such as lie detectors that can be definitely confirmed and determined from this inaccurate GSR signal information.
It was difficult in terms of reliability.

[0014]

[0009]

[0015]

Therefore, the problem to be solved by the present invention is one of biometric information, and biometric information detection that can accurately, simply and simply detect GSR information that can also be used for a lie detector. A device is provided. And
It is intended to provide a device useful for accurate judgment such as a lie detector or a drowsiness preventive device which is an applied device.

[0016]

[0010]

[0017]

In order to solve the above problems, the present invention provides a GSR detecting means for detecting GSR information as a biological information reaction, a pulse wave detecting means for detecting a pulse wave, and the pulse wave. It is characterized by comprising mute means for muting the output of the GSR detection means by the output of the detection means.

Further, the pulse wave detecting means is characterized in that it is provided with a comparing means for rectifying the pulse wave detecting signal to determine whether or not it exceeds a predetermined voltage.

Further, by the output signal of the comparing means, GS
A switch means for turning on / off the output of the R detection means is provided.

[0020]

In addition, according to the present invention, an electrode for detecting the skin potential, an amplifier for amplifying the skin potential detection signal, a BPF that allows the output of the amplifier to pass a signal in a predetermined frequency band, and the output of this BPF is turned on. A switch for turning on / off, a light emitting / receiving unit for detecting a pulse wave signal, a full-wave rectifier circuit for full-wave rectifying the pulse wave signal, and a comparator for comparing the output of the full-wave rectifier circuit with a predetermined voltage, And a switch control means for using the output of the comparator as a control signal for the switch.

Further, it is characterized in that reliable GSR information is accumulated for a predetermined time and the accumulated value is displayed.

[0022]

[0011]

[0023]

In the present invention, the GSR information detected by the energization method or the potential method is muted by the pulse wave signal detected in almost the same situation. Therefore, when an abnormality occurs during the detection of the pulse wave signal, the output of the GSR information is turned off during the period when the abnormality signal of the pulse wave is generated.
Accurate GSR information can be easily and accurately obtained with a simple device.

Further, by accumulating the accurate GSR information for a predetermined time, the change of the biometric information by each individual becomes remarkable, so that it is possible to easily and accurately determine whether or not the person is false.

[0025]

[0012]

[0026]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 3 shows an embodiment of the biological information detecting device of the present invention. In the figure, the same parts as those in FIG. 1 and FIG.

GSR detected from GSR information detecting electrode
Information is input to the high input impedance balanced differential amplifier 10 via the coupling capacitors C2 and C3, and the frequency of 0.
The BSR 5 for filtering 1 to 1 Hz is passed through the buffer amplifier 6 and the analog switch 13 to be a GSR information detection output. On the other hand, the pulse wave detecting means causes the infrared light emitting diode drive circuit 14 to cause the infrared light emitting diode 25 to emit light, and the phototransistor 26 for receiving infrared light receives the reflected wave of the fingertip, and the received light signal is the BPF 16 and the amplifier 17.
One of them is supplied to the pulse wave indicator 21 which displays the received pulse wave signal, and the other is supplied to the full wave rectification circuit 18 which full wave rectifies the pulse wave signal. This full-wave rectified signal is input to one input terminal of the comparator 19, and a predetermined voltage source ER is connected to the other input terminal. The output signal of the comparator 19 is waveform-shaped by the waveform shaping circuit 20, is connected to the control terminal of the analog switch 13, and is output as a control signal.

[0029]

Here, of the skin electrodes 11 and 12, the GS
The R detection electrode 27 and the pulse wave sensor unit 30 will be described in detail. An electrode portion that can be measured by at least two fingers is embedded in a finger placement plate 28 that displays the placement state of the fingers, and the GSR detection electrode 27 has a bias voltage that is a potential difference between the electrodes.
The potential of the skin of the fingertip is detected by using a gold Au-plated metal piece which has a small potential and a small drift, and has a good finger contact and durability. Inside or near the electrode 27, the skin potential detecting electrodes 11 and 12 are provided.
A photoelectric volume pulse wave detection sensor 30 is provided corresponding to the above.

[0030]

Here, the pulse wave detection method will be described. The pulse wave is based on the blood supply from the human heart to blood vessels,
It can be detected as an R wave having a frequency waveform of about 0.6 to 1.8 Hz at rest. The pulse wave serves as an index for investigating changes in human emotions and emotions, and the volume pulse wave is the most suitable index for understanding the vasomotor response. In the circulation of blood, arterioles, meta-arterioles, anterior capsular sphincter muscles, and venules are dominated by sympathetic vasoconstrictor fibers, and the increased sympathetic tone reduces the capillary diameter and decreases the capillary blood.
The living tissue transmits near-infrared light, and the oxy-reduced hemoglobin in the arterial blood absorbs the transmitted light to some extent. The principle of volumetric pulse wave measurement by a photoelectric method is to amplify the amount of light of this wavelength absorbed by oxy / reduced hemoglobin and draw it in a waveform. If the blood vessel is dilated / relaxed, the amount of oxygenated / reduced hemoglobin per unit blood vessel is large, and the amount of light absorbed is also large. On the contrary, if the blood vessel is contracted, the amount of oxyhemoglobin / reduced hemoglobin per unit blood vessel is small and the amount of light absorbed is small.

[0031]

There are a transmission type and a reflection type as the transducer, and a reflection type is shown in FIG. 3 which is one of the embodiments. Transducer as a pulse wave sensor,
Infrared light emitting diode 25 and light receiving phototransistor 26
The volume pulse wave is detected by a photointerrupter that is integrated into a single chip. The infrared light emitting diode 25 may be directly driven by a DC power source in the infrared light emitting diode drive circuit 14, or may be AC driven at a duty ratio of about 1 kHz at about 1 kHz to emit light. good. The emission wavelength is preferably the peak wavelength in the wavelength band (920 nm to 940 nm) most absorbed by blood hemoglobin.

[0032]

The pulse wave light receiving section detects the collector currents of the light receiving phototransistors 26 placed on the index finger and the ring finger respectively, and when the light emitting diode 25 is driven by direct current,
DC fluctuation component of collector current is detected (Fig. 4
(1)). On the other hand, when the light emitting diode 25 is driven by an alternating current, the alternating current output is subjected to envelope detection by a sampling and holding circuit to detect a pulse wave signal (FIG. 4).
(1)). This pulse wave signal is then passed through a bandpass filter BPF16 of 5 Hz to 10 Hz to extract only the component as a pulse wave and remove the noise component. Then, the signal is input to the amplifier 17. Here, because the biosignal level varies from person to person by about 10 times, and even the same person himself or herself may be affected by age, skin sensitivity, environmental conditions, etc. There is a case where the degree of change of the pulse wave from normal time to tension / excitation may fluctuate greatly, and the fluctuation of the output level can be removed to some extent by the AGC circuit.

[0033]

In the amplifier 17 including this AGC circuit, the output of this amplifier 17 is full-wave rectified through a filter,
The clear output is set as a control voltage, and this control voltage controls the gain of the amplifier. The output of the amplifier 17 is full-wave rectified by the full-wave rectifier 18 (see FIG. 4).
(2)). The rectified signal is supplied to the comparator 19 and compared with a predetermined reference voltage ER. If the voltage is higher than the reference voltage ER, a low signal is output to this comparison output and passes through the waveform shaping circuit 20 (see FIG. 4). (3)), the analog switch 13 is turned off. When the analog switch 13 is off,
No GSR signal is output.

[0034]

That is, in a normal state, both the GSR information and the pulse wave signal are correctly detected, the comparator 19 outputs a high signal, and the analog switch 13 is turned on. The input terminal of the analog switch 13 has a G
Since the SR signal information is input, normal and accurate GSR information can be obtained in this ON state.

However, if the fingertip is moved away from the pulse wave sensor 30 during detection, the reflected light of the light receiving portion of the photointerrupter, which is the pulse wave sensor 30, is reduced, and the DC output or sampling of the output of the phototransistor is performed.・ Hold output also decreases. If the comparator 19 has a value larger than the comparison reference voltage, the output of the comparator 19 becomes a low output, the analog switch 13 is cut off, and the GSR signal is muted.

[0036]

The pulse wave changes depending on whether the human emotion is normal or abnormal / excited, and the change in the pulse wave may be used. However, the change in the pulse wave is greater than the change due to poor contact. Extremely small, pulse wave sensor 30 for fingertip and pulse wave
Fluctuations during contact with will have almost no effect when detecting output fluctuations due to this contact failure.

[0037]

As described above, the pulse wave detection sensor 30 is
A hole is provided in the vicinity of the GSR detection electrode, particularly in the center of each GSR detection electrode, and the pulse wave detection sensor is arranged in the hole.
It is possible to determine information, poor contact between the electrode and the skin of the fingertip, or intentional noise.

[0038]

A pulse wave indicator 21 is provided at the output of the amplifier 17.
The pulse wave signal can be connected to the subject, for example, the detection level and frequency can be detected by the LED display, the detection level and frequency can be detected by the buzzer sound, and the degree of tension at that time can be predicted to some extent from the pulse wave. You can also Further, the pulse wave can be recorded on a recording paper print and the change itself of the pulse wave can be observed to be examined medically or physiologically. At this time, an analog switch is provided at the output of the amplifier 17, and the control output signal of the waveform shaping circuit 20 is supplied to the control terminal of this analog switch, so that the pulse wave signal is muted at the time of poor contact to obtain an accurate pulse wave. May be obtained.

[0039]

In this way, it is possible to determine whether the data detected as GSR information is true biometric information or abnormal detection due to poor contact between the electrode and the skin of the fingertip. In addition, accurate GSR information can be obtained without the need for equipment or equipment for firmly fixing the electrode and the fingertip.
When applied to an amusement machine such as a game machine, since the GSR information can be accurately obtained by contacting the electrodes with an unspecified number of people easily and easily, it is more rational under the calmness and excitement. It can be developed into a scientific game. Further, by displaying and presenting the pulse wave signal to the subject, it is possible to educate the person about how to place the fingertip with less contact failure on the finger placing plate 28, and to confirm the degree of tension and excitement of the person. Furthermore, a medical examiner can look at this GSR information and use it as polygraph information, or it can be utilized for the paired comparison question method (PCQT) in the psychophysiological false detection technology sign task.

[0040]

FIG. 5 shows an embodiment of a lie detector as one example.

In the figure, reference numeral 13 is an analog switch which receives the GSR signal information and outputs a true GSR signal under the control of the control signal from the pulse wave signal. Reference numeral 31 designates a constant output level to prevent individual differences. The electronic volume VR 32 is a full-wave rectifier circuit that full-wave rectifies the output of the electronic volume VR 31. Reference numeral 33 is a meter drive circuit that drives the one-sided shake meter 33, and can observe a time-series real fluctuation situation of the GSR signal. Reference numeral 44 is a comparator 40-1 for accumulating the output signal of the full-wave rectification circuit 32 for a predetermined time.
A storage circuit that creates a signal to be displayed on the LED display 41 in comparison with each other at ~ n, which will be described in detail later. The accumulated signal accumulated in the accumulation circuit 44 is applied to each reference voltage V by the comparators 40-1 to 40-n.
Each display element of the LED 41 is turned on when it is compared with r-1 to n and is higher than each reference voltage Vr-1 to n.

[0042]

Reference numeral 42 is a controller CPU, and (1)
From the on of the button switch 44 to the initialization,
Upon receiving the output of the full-wave rectification circuit 32, the A / D conversion means converts the analog signal into a digital signal, and calculates the average value of the true GSR signal information for about 30 seconds as a predetermined time.
By measuring, the gain of the electronic VR 31 is controlled so that the output falls within a constant amplitude. (2) On the other hand, the stored signal output of the storage circuit 44 is converted into a digital signal by the A / D conversion means. , So that a storage signal for 5 seconds as a predetermined time is output to the comparators 40-1 to 40-n.

Reference numeral 43 is a voice recognition circuit, and 44 is a button switch as a control button.

[0044]

This operation will be described below. First, when using this device in a group of several people, ask someone to put their index, middle and ring fingers in place on the lie detector.
Then, the GSR signal information can be obtained as true GSR information through the analog switch 13 according to the control signal indicating whether or not the abnormality is detected from the pulse wave detection. And electronic V
The GSR signal that has passed through R31 and the full-wave rectifier circuit 32 is output from the controller CPU 42 when the button switch 44 is turned on.
As an initialization, the average value of GSR signal information for about 30 seconds is calculated and measured, and the gain of the electronic VR 31 is controlled so that the output of the electronic VR 31 is kept within a constant amplitude. When the gain setting is completed, the outputs of the electronic VR 31 and the full-wave rectifier circuit 32 are driven by the meter drive circuit 33,
The GSR information displays an appropriate shake on the meter 33.

[0045]

Here, the configuration of the storage circuit 44 will be described with reference to FIGS. 5, 6 and 7. In FIG. 5, the output of the full-wave rectification circuit 32 is input to the analog switch 35 and the peak detection circuit 37 of the storage circuit 44, and the analog switch 35
The output of is input to the integration circuit 36 and output to the multiplier 45. On the other hand, the output of the peak detection circuit 37 outputs the signal to the multiplier 45 while the analog switch 39 is off. The multiplier 45 multiplies the output of the integration circuit 36 and the output of the peak detection circuit 37 and outputs the result to the comparators 40-1 to 40-n.

[0046]

FIG. 6 shows this specific embodiment. The GSR signal, which is the output of the full-wave rectifier circuit 32, is input to the multiplier 45 via the switch SW1, the resistor R2, and the capacitor C4. That is, the switch S for 5 seconds as an example of the predetermined time
Since W1 is turned on, GSR arrived in the 5 seconds
The signal charge is stored in the capacitor C4. The accumulated charge voltage is output to the multiplier 45. On the other hand, the GSR signal forms a peak hold circuit with the diode D1, the capacitor C5 and the high impedance amplifier, and the switch SW2 is turned off for 5 seconds as an example of a predetermined time, so that the peak potential for 5 seconds is held in the capacitor C5. And is output to the multiplier 45 via the high impedance amplifier. Thus, the storage circuit has two signal systems. Further, the voice recognition circuit 43 can be used as a substitute for the button switch 44.

[0047]

Next, as an example of the use example, another person in the group asks a question "Do you like XX?" To the person who is currently placing his / her finger on the finger placing plate 28. , Button switch 44 is turned on. Then, the signal value of the GSR information is accumulated for 5 seconds, and the reference voltages V sequentially differ from each other in the comparators 40-1 to 40-n which receive the accumulated output value as an input.
Reference voltage Vr lower than the accumulated output value as compared with r-1 to n
The comparator outputs from -1 to n go high. The LED output 44 is driven by the output of the comparator which becomes high, and the LEDs from the bottom to the top are displayed.

[0048]

At this time, the reason why two signal systems are provided in the storage circuit will be described with reference to FIG. That is, the case where the GSR signal is not detected is shown as case 1, and the areas A, B, and C are shown.
The situation is shown in Cases 2, 3, and 4, respectively. When the button switch 44 is turned on, accumulation and peak hold are operated from the start point for 5 seconds and both of them are multiplied, so that, for example, in case 2 and case 3, the peak level is the same but the area A is larger than the area B. Since the accumulated value is large, the LED display in Case 2 is lit higher. Also,
In case 3 and case 4, the area B and the area C are the same, but the peak value is large in case 4, so that the LED display can point case 4 to the upper position to correspond to the actual contents. The display can be done.

[0049]

The voice recognition circuit 43 can be used in place of the button switch 44. That is, when the voice input is received by the microphone and, for example, "No" is answered, the controller 42 starts counting time by using "No" as a trigger and accumulates SGR signal information for 5 seconds as a predetermined time. Therefore, the voice "No," serves as a substitute for the button switch 44, and automation can be achieved. This is because the degree of human excitement appears as a GSR signal change particularly remarkably a few seconds after the user answers. Therefore, more accurate GSR signal information can be automatically obtained.

[0050]

From the above display state, it is judged whether the person is lying, suspicious or correct. At this time, unlike the instantaneous value display of the meter, since it is the accumulated value for 5 seconds, unlike the peak value of GSR information with large individual differences and the degree of change of GSR information in the degree of tension, it is a lie that is not caught by individual differences or spatial environment. Can be determined almost accurately. This lie detector can be used for both scientific investigation and scientific play.

[0051]

As another embodiment, this GSR information can be applied to a doze-driving prevention device. in this case,
Considering that there are individual differences in the detected values of GSR information,
The potential of the present GSR information is detected, the GSR signal information is accumulated for a predetermined time, and the accumulated potential is compared with a predetermined reference potential replaced with the accumulated potential at rest. This operation is repeatedly measured every predetermined time, and when the accumulated potential during the predetermined time is lower than the accumulated potential at the time of waking up, which is the time of rest, it is determined that the person is dozing. Then, based on the judgment, it is possible to prevent drowsiness by making a stimulating sound, giving a skin stimulus, or performing a stimulating display such as stroboscopic light emission.

[0052]

Further, it can be used for relaxation. Generally, the degree of relaxation is judged from the SCL state and the electroencephalogram state, but the potential of this GSR signal information is accumulated at an appropriate time interval as an appropriate time as an accumulation time and measured from a slightly tense behavioral state. Then, if the accumulated charge drops to a certain potential, it is judged that the person is relaxed. Further, at this time, if the brain waves are also measured and the α waves can be observed while gradually shifting from the β waves, it can be confirmed from the two pieces of information that the accuracy and reliability are extremely high in the relaxed state.

[0053]

Of course, in the above description, the predetermined voltage, the predetermined time, etc. may be variously changed depending on the method of use and environmental conditions. Further, it is recognized that the present invention is not limited to the above-described embodiments, but can be utilized for other implementations within the scope of the technical idea of the present invention.

[0054]

[0035]

[0055]

As described above, the effects of the present invention are listed below. (1) It is possible to determine whether the data detected as the GSR information is true biological information or whether the data is abnormal detection due to poor contact between the electrode and the skin of the fingertip. (2) Accurate GSR information can be obtained without the need for equipment or equipment for firmly fixing the electrode and the fingertip. (3) When applied to amusement equipment such as a game machine, since GSR information can be accurately obtained by simply and easily contacting an unspecified number of people with electrodes, it is more rational under that degree of excitement. It can be developed into a scientific game.

[0056]

(4) By displaying and presenting the pulse wave signal to the subject, it is possible to educate the person about the method with less contact failure and to be confident of his / her tension and excitement. (5) A medical medical examiner can see this GSR information and use it as polygraph information, or it can be used for paired comparison question method (PCQT) in the psychophysiological false detection technology sign task. (6) Since true GSR signal information can be detected, an accurate lie finding machine can be obtained from this detected value.

[Brief description of drawings]

FIG. 1 is a block diagram of a GSR detection circuit according to a conventional energization method.

FIG. 2 is a block diagram of a GSR detection circuit according to a conventional potential method.

FIG. 3 is a diagram showing an example of a GSR detection method by a potential method of a conventional technique.

FIG. 4 is a block diagram showing an example of a biological information detection device of the present invention.

FIG. 5 is a waveform diagram for explaining the biological information detecting device of the present invention.

FIG. 6 is a block diagram showing an example of a lie detector according to the present invention.

FIG. 7 is a diagram showing a specific example of a storage circuit in the example of the lie detector of the present invention according to FIG. 6;

FIG. 8 shows a waveform diagram for explaining the lie detector of the present invention according to FIG.

[Explanation of symbols]

 11, 12 Skin potential detection electrode 13 Analog switch 14 Infrared light emitting diode drive circuit 15 Pulse wave light receiving part 16 BPF 19 Comparator 31 Electronic volume VR 32 Full wave rectification circuit 33 Meter drive circuit 34 Meter 44 Storage circuit

Claims (7)

[Claims] 1. A GSR detecting means for detecting GSR information as a biological information reaction, and a pulse wave detecting means for detecting a pulse wave,
A biological information detecting apparatus comprising: a mute unit for muting the output of the GSR detecting unit by the output of the pulse wave detecting unit. 2. The biological information detecting apparatus according to claim 1, wherein the pulse wave detecting means is provided with a comparing means for rectifying the pulse wave detecting signal to determine whether or not the voltage exceeds a predetermined voltage. 3. The biological information detecting apparatus according to claim 1 or 2, further comprising switch means for turning on / off the output of the GSR detecting means in response to the output signal of the comparing means. 4. An electrode for detecting skin potential, an amplifier for amplifying a skin potential detection signal, a BPF for passing an output of the amplifier through a signal in a predetermined frequency band, and a switch for turning on / off the output of this BPF. , A light emitting / receiving unit for detecting a pulse wave signal, a full wave rectifying circuit for full wave rectifying the pulse wave signal, a comparator for comparing the output of the full wave rectifying circuit with a predetermined voltage, and an output of the comparator. A biometric information detection device comprising: a switch control unit that uses a switch control signal. 5. The biological information detecting device according to claim 3, a comparator for comparing the output of the GSR detecting means output when the switch means is turned on with a predetermined potential, and a display means for making a judgment display by the comparison output. A drowsiness preventer characterized by being equipped. 6. A biological information detecting device according to claim 3, an accumulating means for accumulating an output of the biological information detecting device for a predetermined time, and a lie finding machine for judging a lie or a truth based on an accumulated value of the accumulating means. 7. A GS as a biological information reaction by the potential method.
GSR detecting means for detecting R information, pulse wave detecting means for detecting a pulse wave by an infrared reflection method, a switch for turning on / off the output of the GSR detecting means by the output of the pulse wave detecting means, and the GSR information The electronic volume set to a predetermined gain from the average value of, the storage circuit that stores the output charge of the electronic volume for a predetermined time, the comparator that compares the stored charge with a predetermined potential, and the output of the comparator are displayed. A GSR information application device, comprising: