JP7207839B2 - DETECTION METHOD, DETECTION DEVICE, PROGRAM - Google Patents

Description

The present invention relates to a detection method, a detection device, a recording medium, and a skin potential sensor.

Techniques for preventing dozing off using skin potentials are known.

For example, Japanese Patent Laid-Open No. 2002-200002 describes a technique for preventing dozing off by using skin potentials. According to Patent Literature 1, the low-wakefulness detection unit detects a low-wakefulness state in which the driver is sleepy when the skin potential detected by the skin potential sensor is relatively high. Further, Patent Literature 1 discloses, as a specific example, setting a threshold for distinguishing between a low arousal state and an arousal state, and determining a low arousal state when the skin potential is equal to or higher than the threshold. .

JP 2017-128256 A

According to the skin potential described in Patent Document 1, when the skin potential is relatively low, there is a strong tendency to be in an arousal state, and when the skin potential is relatively high, there is a strong tendency to be in a low arousal state. It is the skin potential level among the skin potentials that has such a tendency. Therefore, Patent Literature 1 is considered to describe a technique for skin potential level among skin potentials.

Here, as shown in FIG. 1, the skin potential level (SPL) may momentarily drop to correspond to the appearance of perspiration on the palm. For this reason, simply setting a threshold as indicated by the circles in FIG. 1, for example, may result in erroneous detection of the momentary decrease as a state of drowsiness. As a result, there is a problem that it is difficult to accurately predict doze.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a detection method, a detection device, and a program that solve the problem that it is difficult to accurately predict doze.

It should be noted that the influence of the instantaneous change as described above can be eliminated by, for example, setting the cutoff frequency of the low-pass filter low. However, if the cutoff frequency of the low-pass filter is set low, the change in numerical value becomes gentle, and the immediacy of detection is lost. Therefore, it is difficult to adopt the above method.

In order to achieve such an object, the detection method, which is one embodiment of the present invention, comprises
A detection device for detecting a user state,
Acquiring information indicating the skin potential level including the DC component of the skin potential activity,
A user's condition is detected based on the degree of change in the skin potential level.

In addition, a detection device that is another aspect of the present invention includes:
A detection device for detecting a state of a user,
an acquisition unit for acquiring information indicating a skin potential level including a DC component of skin potential activity;
a detection unit that detects a user's condition based on the degree of change in the skin potential level acquired by the acquisition unit;
It has a configuration of

A recording medium according to another aspect of the present invention is
A detection device that detects the state of the user,
an acquisition unit for acquiring information indicating a skin potential level including a DC component of skin potential activity;
a detection unit that detects a user's condition based on the degree of change in the skin potential level acquired by the acquisition unit;
A computer-readable recording medium recording a program for realizing

In addition, a skin potential sensor that is another embodiment of the present invention includes:
A skin potential sensor that measures at least a skin potential level,
a first electrode for inducing a skin potential and a second electrode;
The first electrode is placed on the user's palm or sole, and the second electrode is placed on the user's inner forearm or dorsum of the hand or ankle or dorsum of the foot.

ADVANTAGE OF THE INVENTION By being comprised as mentioned above, this invention can provide the detection method, detection apparatus, program, and skin potential sensor which solve the problem that it is difficult to accurately predict doze.

It is a figure for explaining a problem. It is a figure showing an example of composition of a detection system in a 1st embodiment of the present invention. It is a figure which shows an example of a structure of a skin potential sensor. FIG. 4 is a diagram showing an example of the relationship between SPL, perspiration of the palm, and RR interval. FIG. 4 is a diagram showing an example of the relationship between SPL, palm perspiration, and α-wave frequency; FIG. 4 is a diagram showing an example of changes in skin potential levels during nighttime driving; 3 is a block diagram showing an example of the configuration of the detection device shown in FIG. 2; FIG. FIG. 4 is a diagram showing an example of changes in skin potential level; FIG. 4 is a diagram showing an example of changes in skin potential reflex; It is a flowchart which shows an example of operation|movement of a detection apparatus. It is a block diagram which shows an example of a structure of the detection apparatus in the 2nd Embodiment of this invention.

[First Embodiment]
A first embodiment of the invention will now be described with reference to FIGS. FIG. 2 is a diagram showing an example of the configuration of the detection system 100. As shown in FIG. FIG. 3 is a diagram showing an example of the configuration of the skin potential sensor 200. As shown in FIG. FIG. 4 is a diagram showing an example of the relationship between the SPL, perspiration of the palm, and the RR interval. FIG. 5 is a diagram showing an example of the relationship between SPL, palm perspiration, and alpha wave frequency. FIG. 6 is a diagram showing an example of changes in the skin potential level during nighttime driving. FIG. 7 is a block diagram showing an example of the configuration of the detection device 300. As shown in FIG. FIG. 8 is a diagram showing an example of changes in skin potential level. FIG. 9 is a diagram showing an example of changes in skin potential reflex. FIG. 10 is a flow chart showing an example of the operation of the detection device 300. As shown in FIG.

In the first embodiment of the present invention, a detection system 100 having a detection device 300 that detects a user's condition by performing analysis based on the measurement results of the skin potential sensor 200 will be described. As will be described later, the detection device 300 detects the skin potential level (SPL), which includes the DC component of skin potential activity (SPA), and the AC component of the skin potential activity (including the DC component). no) skin potential reflex (SPR). Then, the detecting device 300 detects the user's condition based on the skin potential level and the skin potential reflex. For example, the detection device 300 detects the initial stage of drowsy based on the change in skin potential level and skin potential reflex. By detecting the initial stage of drowsy, it is possible to accurately predict doze.

Note that drowsy is a medical term that describes a state of drowsiness or absent-mindedness. A drowsy state is a state in which there is a risk of dozing off. For example, in dangerous work such as driving a car, a drowsy state can cause a serious accident. In addition, for example, in office work, etc., a drowsy state causes a decrease in work efficiency.

FIG. 2 is a diagram showing an example of the overall configuration of the detection system 100. As shown in FIG. Referring to FIG. 2 , the detection system 100 has, for example, a skin potential sensor 200 and a detection device 300 . As shown in FIG. 2, the skin potential sensor 200 and the detection device 300 are connected so as to communicate with each other by wireless communication such as Wi-Fi (registered trademark) or Bluetooth (registered trademark). Note that the skin potential sensor 200 and the detection device 300 may be connected, for example, by a wire so that they can communicate with each other.

Skin potential sensor 200 is worn on a user's hand or the like. For example, the skin potential sensor 200 has electrodes and the like, and measures the skin potential level and the skin potential reflection.

Further, the skin potential sensor 200 has a function of communicating with the detecting device 300 by wireless communication, for example. For example, the skin potential sensor 200 transmits information indicating the skin potential level and information indicating the skin potential reflex, which are measurement results, to the detecting device 300 by wireless communication.

FIG. 3 shows a configuration example of a portion of the skin potential sensor 200 that measures the skin potential level and the skin potential reflection. As shown in FIG. 3, the skin potential sensor 200 includes, for example, electrodes 210 and 220 that induce skin potential, a differential amplifier (amplifier) 230, and a skin potential level and skin potential reflection from the induced potential. and a filter 240 for extraction.

The positions of the electrodes 210 and 220 affect the value of the skin potential level. Therefore, the positions of electrodes 210 and 220 must be carefully selected. For example, as shown in FIG. 3, electrodes 210 are placed on the palm and electrodes 220 are placed on the inner forearm or back of the hand. By arranging the electrodes 210 and 220 in this way, it is possible to appropriately evaluate the skin potential level. In other words, in order to measure the skin potential level with high accuracy, it is preferable to place the electrode 210 on the palm and the electrode 220 on the inside of the forearm or the back of the hand.

Also, the skin potential level can be measured from the sole of the foot. Electrodes 210 are placed on the sole of the foot and electrodes 220 are placed on the ankle or dorsum of the foot.

The electrodes 210 and 220 can be electrocardiogram electrodes composed of Ag/AgCl electrodes and adhesive gel or paste, and conductive fibers and the like can be used. When conductive fibers or the like are used as the electrodes 210 and 220, the skin potential sensor 200 may be realized as gloves, socks, sandals, or the like, for example.

The filter 240 separates the potential skin potential levels into potential skin potential levels containing a DC component and potential skin potential reflections not containing a DC component. For example, the baseline skin potential level to be focused on for realizing doze prediction is about 0.04 Hz or less. Therefore, it is desirable that the filter 240 be a filter that extracts components of approximately 0.04 Hz or less.

It should be noted that the skin potential level is a value including a DC component of the skin potential activity, as described above. In other words, the skin potential level is the long-term fluctuating component of skin potential activity. We confirmed that when a person closed their eyes, the baseline skin potential level changed and the negative potential approached zero. For example, FIG. 4 shows the results of comparison between the skin potential level (SPL) when the eyes are closed, the change in palm sweating, and the RR interval indicating the interval between R waves. Specifically, the upper graph in FIG. 4 shows the skin potential level, the middle graph in FIG. 4 shows changes in palm sweating, and the lower graph in FIG. 4 shows the RR interval. . Moreover, FIG. 5 shows the result of comparing the skin potential level (SPL), the change in palm sweating, and the electroencephalogram (α wave frequency) when the eyes are closed. Specifically, the upper graph in FIG. 5 shows the skin potential level, the middle graph in FIG. 5 shows changes in palm sweating, and the lower graph in FIG. 5 shows brain waves (α wave frequency). is shown. In general, in a resting state (or drowsy state), the alpha wave frequency of electroencephalograms increases and the RR interval decreases. Referring to FIGS. 4 and 5, it can be seen that the phenomenon in which the baseline skin potential level changes and the negative potential approaches zero occurs in synchronism with the increase in the α-wave frequency and the decrease in the RR interval. In other words, referring to FIGS. 4 and 5, when the alpha wave frequency and RR interval of the electroencephalogram indicate a resting state (or drowsy state), the baseline of the skin potential level changes and becomes negative. It can be seen that the potential of is approaching zero.

Also, FIG. 6 shows an example of changes in the skin potential level during nighttime driving. Referring to FIG. 6, it can be seen that the baseline skin potential level changes even during nighttime driving.

Further, the skin potential reflex is an AC component of the skin potential activity. The skin potential reflex instantaneously responds to an external stimulus or the like.

An example of the configuration of the skin potential sensor 200 has been described above. The skin potential sensor 200 may be attached and fixed in advance to the user's hand or the like by the above-described mechanism, or may be provided at a location where the user's hand contacts, such as the steering wheel of an automobile.

The detection device 300 is an information processing device that performs analysis based on the results of measurement by the skin potential sensor 200 and detects the state of the user such as the initial stage of drowsy. The function of the detecting device 300 may be provided by, for example, an independent information processing device, or may be provided by an in-vehicle device such as a car navigation device.

FIG. 7 shows an example of the configuration of the detection device 300. As shown in FIG. Referring to FIG. 7, the detection device 300 has a screen display unit 310, an audio output unit 320, a communication I/F unit 330, a storage unit 340, and an arithmetic processing unit 350 as main components. are doing.

The screen display unit 310 is composed of a screen display device such as an LCD (Liquid Crystal Display). The screen display unit 310 can display warning information or the like on the screen according to an instruction from the arithmetic processing unit 350 .

The audio output unit 320 is composed of a device for outputting audio such as a microphone, a speaker, headphones, and earphones. The audio output unit 320 can output warning information or the like according to instructions from the arithmetic processing unit 350 .

Communication I/F section 330 is composed of a data communication circuit. Communication I/F section 330 performs data communication with various devices connected via a communication line. For example, detection device 300 receives information indicating the skin potential level and information indicating skin potential reflex from skin potential sensor 200 via communication I/F section 330 .

The storage unit 340 is a storage device such as a hard disk or memory. The storage unit 340 stores processing information and programs 343 necessary for various processes in the arithmetic processing unit 350 . The program 343 realizes various processing units by being read and executed by the arithmetic processing unit 350 . The program 343 is read in advance from an external device or recording medium via a data input/output function such as the communication I/F unit 330 and stored in the storage unit 340 . Main information stored in the storage unit 340 includes, for example, skin potential level information 341 and skin potential reflex information 342 .

Further, the arithmetic processing unit 350 has a microprocessor such as an MPU and its peripheral circuits. The arithmetic processing unit 350 reads the program 343 from the storage unit 340 and executes it, thereby realizing various processing units by cooperating the hardware and the program 343 . Main processing units realized by the arithmetic processing unit 350 include, for example, a measurement result acquisition unit 351, a state detection unit 352, and a warning unit 353.

Hereinafter, each processing unit and each information described above will be described in more detail.

The measurement result acquiring unit 351 acquires from the skin potential sensor 200 information indicating the skin potential level and information indicating the skin potential reflex, which are the measurement results of the skin potential sensor 200 . Then, the measurement result obtaining unit 351 stores the obtained information indicating the skin potential level as the skin potential level information 341 in the storage unit 340, and stores the obtained information indicating the skin potential reflex as the skin potential reflex information 342 in the storage unit 340. store in

The state detection unit 352 detects the user's state based on the skin potential level indicated by the skin potential level information 341 and the skin potential reflex indicated by the skin potential reflex information 342 . For example, the state detection unit 352 detects that the user is in the initial stage of drowsy based on the skin potential level and the skin potential reflex.

For example, the state detection unit 352 checks how the skin potential level changes. Then, when it is determined that the degree of change in the skin potential level satisfies a predetermined condition, the state detection unit 352 determines that the user may be in the initial stage of drowsy.

Specifically, for example, the state detection unit 352 calculates the rate of change (inclination) at each point every second. That is, the state detection unit 352 calculates, for each point, the slope, which is a value indicating how the skin potential level changes over time. Then, the state detection unit 352 confirms whether or not the period in which the calculated slope is equal to or greater than a predetermined value (which may be an arbitrary value) continues for a predetermined period (which may be an arbitrary period such as 10 seconds or 30 seconds). to check the change in the skin potential level. When the slope is equal to or greater than the predetermined value for a predetermined period of time, the state detection unit 352 determines that the user may be in the initial stage of drowsy. In this case, the state detection unit 352, for example, confirms skin potential reflection, which will be described later. On the other hand, if the period in which the slope is equal to or greater than the predetermined value does not continue for a predetermined period of time, the state detection unit 352 determines that the possibility that the user is in the early stages of drowsy is low.

For example, FIG. 8 shows an example of the skin potential level indicated by the skin potential level information 341. As shown in FIG. In the case shown in FIG. 8, the value of the skin potential level continuously approaches 0 from about 5 minutes 30 seconds to 6 minutes 30 seconds and from about 6 minutes 30 seconds past to 10 minutes past. , the slope of each point increases. In such a state where the period in which the slope is large continues for a predetermined period, the state detection unit 352 can determine that the user may be in the initial stage of drowsy.

As described above, the state detection unit 352 determines whether or not there is a possibility that the user is in the initial stage of drowsy, based on the degree of change in the skin potential level. In other words, the state detection unit 352 determines whether or not there is a possibility that the skin potential level is in the initial stage of drowsy, depending on whether or not the value of the skin potential level has been continuously approaching 0 for a predetermined period of time. can also

In addition, when the state detection unit 352 determines that there is a possibility of being in the initial stage of drowsy based on the skin potential level, the state detection unit 352 checks how the skin potential reflex changes. Then, when it is determined that the change in the skin potential reflex satisfies a predetermined condition, the state detection unit 352 detects that the drowsy is in the initial stage.

Specifically, for example, the state detection unit 352 determines whether or not an amplitude equal to or greater than a predetermined value is confirmed in the skin potential reflex during a predetermined period (or whether the number or frequency of amplitudes is equal to or less than a predetermined number such as 1 or less). No) Confirm. Then, if an amplitude equal to or greater than a predetermined value is not confirmed in the skin potential reflex for a predetermined period of time, the state detection unit 352 detects that the drowsy is in the initial stage. On the other hand, when an amplitude equal to or larger than the predetermined value is confirmed in the skin potential reflex, the state detection unit 352 does not detect that the drowsy is in the initial stage.

For example, FIG. 9 shows an example of potential skin potential reflex indicated by the potential skin potential reflex information 342 . In the case shown in FIG. 9, the amplitude of the skin potential reflex is not confirmed in the period corresponding to the case shown in FIG. 8, and the value is almost zero. Therefore, the state detection unit 352 can detect that the drowsy is in the initial stage, for example, within the period described above.

As described above, the state detection unit 352 detects the initial stage of drowsy based on the change in the skin potential reflex. In other words, the state detection unit 352 detects that it is in the initial stage of drowsy depending on whether or not the value of the skin potential reflex is continuously 0 (below a predetermined value) for a predetermined period of time. You can also say.

The predetermined period for confirming the skin potential reflex is, for example, the same period as the predetermined period for confirming the skin potential reflex. The predetermined period for confirming the skin potential reflex may be a predetermined period (arbitrary period) after confirming the skin potential reflex.

For example, as described above, the state detection unit 352 detects that the drowsy is in the initial stage based on the degree of change in the skin potential level and the degree of change in the skin potential reflex. Then, when detecting that it is in the initial stage of drose, the state detection unit 352 notifies the warning unit 353 that it has detected that it is in the initial stage of drose.

The warning unit 353 issues a predetermined warning when the state detection unit 352 determines that the drowsy is in the initial stage. For example, the warning unit 353 warns by displaying warning information indicating that the drowsy is in the initial stage on the screen display unit 310 or by outputting the warning information via the audio output unit 320 . The warning unit 353 may be configured to issue a warning by a method other than those exemplified above, such as transmitting warning information to an external device via the communication I/F unit 330 or vibrating a smartphone owned by the user. Absent.

The above is an example of the configuration of the detection device 300 . Next, an example of the operation of the detection device 300 will be described with reference to FIG. 10 .

Referring to FIG. 10, the state detection unit 352 of the detection device 300 checks whether or not the degree of change in the skin potential level satisfies a predetermined condition (step S101). For example, the state detection unit 352 calculates the rate of change at each point such as every second, and confirms whether or not the period in which the calculated slope is equal to or greater than a predetermined value continues for a predetermined period of time.

If the change in the skin potential level does not satisfy the predetermined condition (step S101, No), the state detection unit 352 continues checking the change in the skin potential level. On the other hand, if the change in skin potential level satisfies the predetermined condition (step S101, Yes), the state detection unit 352 checks whether the change in skin potential reflex satisfies the predetermined condition (step S102). For example, the state detection unit 352 confirms whether or not an amplitude equal to or greater than a predetermined value is confirmed in the skin potential reflex during a predetermined period.

If the change in the skin potential reflex does not satisfy the predetermined condition (step S102, No), the state detection unit 352 returns to confirming the change in the skin potential level. On the other hand, if the change in the skin potential reflex satisfies the predetermined condition (step S102, Yes), the state detection unit 352 detects that the drowsy is in the initial stage (step S103). Then, the state detection unit 352 notifies the warning unit 353 that it has detected that the drowsy is in the initial stage.

The warning unit 353 warns that the drowsy is in the initial stage (step S104). For example, the warning unit 353 issues a warning by displaying warning information on the screen display unit 310 or by outputting warning information via the audio output unit 320 .

The above is an example of the operation of the detection device 300 .

Thus, the detection device 300 has the measurement result acquisition section 351 and the state detection section 352 . With such a configuration, the state detection unit 352 can detect that the drowsy is in the initial stage based on the change in the skin potential level and the change in the skin potential reflex acquired by the measurement result acquisition unit 351. can. In this way, by detecting the initial stage of drowsy based on the degree of change in the skin potential level and the degree of change in the skin potential reflex, it is possible to reduce erroneous detection due to an instantaneous drop in the skin potential level. . As a result, it is possible to accurately detect the initial stage of drowsy, and to accurately predict doze.

In addition, when conductive fibers or the like are used as the electrodes 210 and 220 to induce skin potentials, the skin and the conductive fibers are polarized, and the measured skin potential levels are often incorrect. . Moreover, the problem that a high frequency noise is easy to be superimposed also arises. According to the method of performing detection based on the degree of change in the skin potential level and the degree of change in the skin potential reflex described in the present embodiment, the determination is not simply based on the magnitude of the values. Even if there is a problem with the contact condition of the drowsy, it is possible to detect the initial stage of the drowsy more accurately. In other words, when the method described in this embodiment is used, depending on the degree of contact between the electrodes 210 and 220 and the skin, the skin potential level and the skin potential reflex value may be higher or lower. Even in the case of drowsy, it is possible to accurately detect that it is in the initial stage of drowsy.

Moreover, as described above, the detection device 300 uses both the degree of change in the skin potential level and the degree of change in the skin potential reflex. In this way, by performing detection based on the degree of change in the skin potential level and the degree of change in the skin potential reflex, even if the period for confirming the skin potential level is shortened, it is possible to more accurately detect the initial stage of drowsy. can be detected. That is, according to the above configuration, it is possible to accurately detect the initial stage of drowsy while shortening the time until detection.

In the present embodiment, the case where the detection device 300 performs detection based on the degree of change in the skin potential level and the degree of change in the skin potential reflex has been exemplified. However, the detection device 300 may be configured to detect the initial stage of drowsy using only one of the change in skin potential level and the change in skin potential reflex. For example, the detection device 300 may be configured to detect the initial stage of drowsy based on how the skin potential level changes.

Moreover, in the present embodiment, the case where the function as the detection device 300 is realized by one information processing device has been exemplified. However, the function as the detection device 300 may be realized by, for example, a plurality of information processing devices connected via a network.

[Second embodiment]
A second embodiment of the present invention will now be described with reference to FIG. In a second embodiment, the configuration of the detection device 40 will be described.

The detection device 40 is an information processing device that detects the state of the user. FIG. 11 shows an example of the configuration of the detection device 40. As shown in FIG. Referring to FIG. 11, the detection device 40 has an acquisition unit 41 and a detection unit 42, for example.

For example, the detection device 40 has an arithmetic device such as a CPU (Central Processing Unit) and a storage device. For example, the detecting device 40 realizes each of the above-described processing units by executing a program stored in a storage device by an arithmetic device.

The acquisition unit 41 acquires information indicating a skin potential level including a DC component of skin potential activity.

The detection unit 42 detects the state of the user based on the change in skin potential level acquired by the acquisition unit 41 .

Thus, the detection device 40 has an acquisition unit 41 and a detection unit 42 . With such a configuration, the detection unit 42 can detect the state of the user based on the change in skin potential level acquired by the acquisition unit 41 . In this way, by detecting the user's condition based on the degree of change in the skin potential level, it is possible to reduce erroneous detection due to an instantaneous drop in the skin potential level. As a result, it is possible to accurately detect the user's state.

Further, the detection device 40 described above can be realized by installing a predetermined program in the detection device 40 . Specifically, a program that is another embodiment of the present invention includes an acquisition unit 41 that acquires information indicating a skin potential level, which is a DC component of skin potential activity, from a detection device 40 that detects a user's condition, an acquisition unit 41 is a program for realizing a detection unit that detects the user's condition based on the change in skin potential level acquired by 41 .

In addition, in the detection method executed by the detection device 40 described above, the detection device that detects the user's condition acquires information indicating the skin potential level, which is the DC component of the skin potential activity, and detects changes in the skin potential level. Based on this, the user's state is detected.

Even the invention of the program (or recording medium) or detection method having the above-described configuration achieves the above-described object of the present invention because it has the same actions and effects as the detection device 40 described above. be able to.

<Appendix>
Some or all of the above embodiments may also be described as the following appendices. The outline of the detection method and the like in the present invention will be described below. However, the present invention is not limited to the following configurations.

(Appendix 1)
A detection device for detecting a user state,
Acquiring information indicating the skin potential level, which is the DC component of the skin potential activity,
A detection method for detecting a user's condition based on the degree of change in the skin potential level.
(Appendix 2)
The detection method according to Appendix 1,
A detection method for detecting a user's condition based on how the skin potential level changes over time.
(Appendix 3)
The detection method according to Supplementary Note 1 or Supplementary Note 2,
A detection method for calculating a slope of the skin potential level and detecting a user's state based on the calculated slope.
(Appendix 4)
The detection method according to Appendix 3,
A detection method for detecting a state of a user based on a period in which the calculated slope has a magnitude equal to or greater than a predetermined value.
(Appendix 5)
The detection method according to any one of Supplements 1 to 4,
Acquiring information indicating the skin potential reflex, which is an AC component of the skin potential activity,
A detection method for detecting a state of a user based on the degree of change in the skin potential level and the degree of change in the skin potential reflex.
(Appendix 6)
The detection method according to Appendix 5,
A detection method for detecting a state of a user based on a period during which the amplitude of the skin potential reflex is not confirmed.
(Appendix 7)
The detection method according to Supplementary Note 5 or Supplementary Note 6,
If the period in which the slope of the skin potential level has a magnitude equal to or greater than a predetermined value satisfies the condition and the period in which the amplitude of the skin potential reflex is not confirmed satisfies the condition, the user feels drowsy. detection method.
(Appendix 8)
The detection method according to any one of Supplements 1 to 7,
A detection method that issues a warning according to the state of the detected user.
(Appendix 9)
The detection method according to any one of Appendixes 1 to 8,
A detection method for detecting that the state of the user is in the initial stage of drowsy.
(Appendix 10)
A detection device for detecting a state of a user,
an acquisition unit that acquires information indicating a skin potential level that is a DC component of skin potential activity;
a detection unit that detects a user's condition based on the degree of change in the skin potential level acquired by the acquisition unit;
a detection device.
(Appendix 11)
A detection device that detects the state of the user,
an acquisition unit that acquires information indicating a skin potential level that is a DC component of skin potential activity;
a detection unit that detects a user's condition based on the degree of change in the skin potential level acquired by the acquisition unit;
A computer-readable recording medium that records a program for realizing (Appendix 12)
A skin potential sensor that measures at least a skin potential level,
a first electrode for inducing a skin potential and a second electrode;
A skin potential sensor, wherein the first electrode is arranged on the user's palm, and the second electrode is arranged on the inner side of the user's forearm or the back of the hand.

It should be noted that the programs described in each of the above embodiments and supplementary notes are stored in a storage device or recorded in a computer-readable recording medium. For example, the recording medium is a portable medium such as a flexible disk, an optical disk, a magneto-optical disk, and a semiconductor memory.

Although the present invention has been described with reference to the above-described embodiments, the present invention is not limited to the above-described embodiments. Various changes that can be understood by those skilled in the art can be made to the configuration and details of the present invention within the scope of the present invention.

In addition, the present invention enjoys the benefit of the priority claim based on the patent application of Japanese Patent Application No. 2019-213017 filed on November 26, 2019 in Japan, and is described in the patent application. The contents are hereby incorporated by reference in their entirety.

100 detection system 200 skin potential sensor 210 electrode 220 electrode 230 differential amplifier 240 filter 300 detector 310 screen display unit 320 audio output unit 330 communication I/F unit 340 storage unit 341 skin potential level information 342 skin potential reflex information 350 arithmetic processing Unit 351 Measurement result acquisition unit 352 State detection unit 353 Warning unit 40 Detection device 41 Acquisition unit 42 Detection unit

Claims (3)

A detection device for detecting a user state,
Acquiring information indicating the skin potential level including the DC component of the skin potential activity and information indicating the skin potential reflex that is the AC component of the skin potential activity,
detecting a state of a user based on the degree of change in the skin potential level and the degree of change in the skin potential reflex;
At the time of detection, when the period in which the slope of the skin potential level has a magnitude equal to or greater than a predetermined value satisfies the condition and the period in which the amplitude of the skin potential reflex is not confirmed satisfies the condition, the user A detection method for detecting that a person feels sleepy. A detection device for detecting a state of a user,
an acquisition unit for acquiring information indicating a skin potential level including a DC component of skin potential activity;
a detection unit that detects a user's condition based on the degree of change in the skin potential level acquired by the acquisition unit;
has
The acquisition unit acquires information indicating skin potential reflex, which is an AC component of skin potential activity,
The detection unit detects the state of the user based on the degree of change in the skin potential level and the degree of change in the skin potential reflex,
When the period in which the slope of the skin potential level has a magnitude equal to or greater than a predetermined value satisfies the condition and the period in which the amplitude of the skin potential reflex is not confirmed satisfies the condition, the detection unit detects that the user A detection device for detecting that a person feels drowsy. A detection device that detects the state of the user,
an acquisition unit for acquiring information indicating a skin potential level including a DC component of skin potential activity;
a detection unit that detects a user's condition based on the degree of change in the skin potential level acquired by the acquisition unit;
to realize
The acquisition unit acquires information indicating skin potential reflex, which is an AC component of skin potential activity,
The detection unit detects the state of the user based on the degree of change in the skin potential level and the degree of change in the skin potential reflex,
When the period in which the slope of the skin potential level has a magnitude equal to or greater than a predetermined value satisfies the condition and the period in which the amplitude of the skin potential reflex is not confirmed satisfies the condition, the detection unit detects that the user A program that detects when a person is feeling sleepy.

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