JPH0796767A - Driver's physical condition detector for vehicle - Google Patents

Abstract

PURPOSE:To detect the physical condition of a driver yet more accurately by collectively judging such information that is hard to judge each driver's physical condition individually, pertaining to a physical condition detector for vehicles suitable for preventing any possible half-asleep-driving from occurring. CONSTITUTION:In this detector, two skin potential detecting means 10 and 11 detecting the skin potential of a car driver, a steering frequency detecting means 4A detecting the steering frequency of a car, and a physical condition judging means 26 judging the driver's physical conditions on the basis of skin potential information detected by the skin potential detecting means 10 and 11 and steering frequency information detected by the steering frequency detecting means 4A are all made so as to be installed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle physical condition detecting device suitable for use in preventing drowsy driving.

[0002]

2. Description of the Related Art Conventionally, means for detecting the physical condition of a driver of a vehicle has been considered for the purpose of, for example, preventing drowsy driving. As a means for detecting the physical condition of the driver of this vehicle, there is one based on the pulse rate of the driver or the cardiac potential between both hands, and particularly as a means for detecting the awakening degree of the driver, the steering pattern Some were based on characteristics and others were based on changes in heart rate and skin potential.

After that, a device that detects the physical condition of the driver based on the pulse rate of the driver is, for example, Japanese Patent Laid-Open No. 59-22.
There is a device disclosed in Japanese Patent No. 537. With this device,
A photoelectric pulse rate sensor is attached to the steering wheel, and the driver puts his finger on the sensor to detect the pulse rate. Further, as a device for detecting the physical condition of the driver based on the cardiac potential between both hands of the driver, for example, there is a device disclosed in Japanese Patent Laid-Open No. 59-25730. With this device, 2
Two electrodes are attached, and the driver grasps the two electrodes with both hands to detect the electrocardiographic potential between both hands.

A device for detecting the arousal level based on the characteristics of the steering pattern is disclosed in, for example, Japanese Patent Laid-Open No. 52-25336.
There is a device disclosed in the publication. This device takes advantage of the fact that when the awakening level is low, the driver's steering wheel operation is reduced and the operation becomes messy, so that minute steering correction cannot be performed. That is, for example, the deviation frequency of the steering angle of the steering wheel with respect to a predetermined detection angle is detected, and this is compared with the expected frequency during normal driving to determine whether or not the vehicle is driven at a normal awakening degree.

A device for detecting the arousal level based on changes in the driver's heart rate and skin potential is disclosed in, for example, Japanese Unexamined Patent Publication No.
There is a device disclosed in Japanese Patent No. 250221. This device utilizes the fact that the heart rate and skin potential are lower during sleep than when awake.

[0006]

However, such a conventional vehicle physical condition detecting device has the following problems. First, in the case of detecting the pulse rate of the driver, it cannot be detected unless the driver presses his / her finger against the sensor attached to the steering wheel.In the case of detecting the heart potential between both hands, the driver cannot If you don't hold the handle with, the detection will be impossible.

Further, in the case of detecting the driver's arousal level by detecting the characteristics of the steering pattern, the awakening level information of the steering wheel operation is buried due to changes in the road environment such as a bend in the road, so that the driver can drive accurately. It is difficult to detect the physical condition of the person. Further, in the case of detecting changes in the heart rate and skin potential of the driver, it is difficult to accurately detect the decrease in arousal level because the situation greatly differs due to individual differences.
For example, in the device disclosed in Japanese Patent Application Laid-Open No. 1-250221, the skin potential after the skin potential reflection (SPR) converges is used as the skin potential reference value during awakening, but SPR occurs even while falling asleep. Therefore, there is a possibility that the standard may be wrong, and in this case as well, it is difficult to accurately detect the decrease in arousal level.

The present invention was devised in view of the above problems, and it is possible to more reliably detect the physical condition of the driver by comprehensively determining the information that makes it difficult to determine the physical condition of the driver independently. An object of the present invention is to provide a physical condition detecting device for a vehicle.

[0009]

Therefore, the vehicle physical condition detecting device of the present invention according to claim 1 detects the skin potential detecting means for detecting the skin potential of the driver of the vehicle and the steering frequency of the vehicle. And a physical condition determination unit for determining the physical condition of the driver based on the skin potential information detected by the skin potential detection unit and the steering frequency information detected by the steering frequency detection unit. It is characterized by being.

According to a second aspect of the present invention, there is provided the vehicle physical condition detecting device according to the first aspect, wherein the physical condition determining means sets a skin potential reference value which is a reference of the skin potential value. Skin potential reference value setting means, the skin potential of the detected skin potential based on the skin potential information detected by the skin potential detecting means and the skin potential reference value set by the skin potential reference value setting means Skin potential reduction rate calculating means for calculating the reduction rate from the reference value, and skin potential reduction rate for determining the skin potential reduction rate based on the skin potential reduction rate information from the skin potential reduction rate calculation step A determining unit, a steering frequency-corresponding physical condition lowering rate determining unit for determining a steering frequency-corresponding physical condition lowering rate based on the steering frequency information detected by the steering frequency detecting unit, the skin potential-corresponding physical condition lowering rate determining unit, and Frequent steering The physical condition deterioration determining unit that determines whether the physical condition of the driver is deteriorated by integrating the determination information from the corresponding physical condition deterioration rate determining unit, and the skin potential corresponding physical condition decreasing rate determining unit is the skin In response to the increase in the potential decrease rate, the skin potential corresponding physical condition decrease rate is determined to be larger, and the steering frequency corresponding physical condition decrease rate determining means corresponds to the steering frequency corresponding physical condition in response to the decrease in the steering frequency. It is characterized in that it is set so that the rate of decrease is determined to be larger.

According to a third aspect of the present invention, there is provided a vehicle physical condition detecting device according to the first or second aspect, wherein the skin potential detecting means is a wristband attached to the wrist of the driver and the wristband. The physical condition determining means is provided on the glove worn on the palm of the driver, and the physical condition determining means is installed on the vehicle side to exchange information between the skin potential detecting means and the physical condition determining means via radio waves. It is characterized by being set to be performed.

According to a fourth aspect of the present invention, there is provided a physical condition detecting device for a vehicle, the skin temperature detecting means for detecting a skin temperature of a driver of the vehicle, and the pulse rate detecting for detecting a pulse rate of the driver of the vehicle. Means and a physical condition determining means for determining the physical condition of the driver based on the skin temperature information detected by the skin temperature detecting means and the pulse rate information detected by the pulse rate detecting means. I am trying.

According to a fifth aspect of the present invention, there is provided the vehicle physical condition detecting device according to the fourth aspect, wherein the physical condition determining means sets a skin temperature reference value as a reference of the skin temperature value. Skin temperature reference value setting means, the skin temperature of the detected skin temperature based on the skin temperature information detected by the skin temperature detecting means and the skin temperature reference value set by the skin temperature reference value setting means Skin temperature change rate calculating means for calculating the change rate from the reference value, and based on the skin temperature change rate information from the skin temperature change rate calculating means, the skin temperature corresponding physical condition decrease rate for determining the skin temperature corresponding physical condition decrease rate Determination means, pulse rate reference value setting means for setting a pulse rate reference value serving as a reference for the pulse rate value, pulse rate information detected by the pulse rate detection means, and pulse rate reference value setting means Based on the pulse rate reference value Then, based on the pulse rate change rate calculation means for calculating the rate of change of the detected pulse rate from the pulse rate reference value, and the pulse rate change rate information from the pulse rate change rate calculation means The pulse rate corresponding physical condition decrease rate determining means for determining the decrease rate, the skin temperature corresponding physical condition decrease rate determining means and the pulse rate corresponding physical condition decrease rate determining means are combined to reduce the physical condition of the driver. The skin temperature-corresponding physical condition decrease rate determining means determines the skin temperature-corresponding physical condition decrease rate to be larger in response to the increase in the skin temperature change rate. In addition, the pulse rate corresponding physical condition lowering rate determining means is set so as to determine the pulse rate corresponding physical condition lowering rate to be larger in response to the increase in the pulse rate change rate. .

According to a sixth aspect of the present invention, there is provided the vehicle physical condition detecting device according to the fourth or fifth aspect, wherein the skin temperature detecting means and the pulse rate detecting means are attached to the wrist of the driver. The physical condition determination means is provided on the vehicle side while being provided on the wristband, and information is exchanged between the skin temperature detection means and the pulse rate detection means and the physical condition determination means via radio waves. It is characterized in that it is set to be performed by.

According to a seventh aspect of the present invention, there is provided a physical condition detecting device for a vehicle comprising: a skin potential detecting means for detecting a skin potential of a driver of the vehicle; and a steering frequency detecting means for detecting a steering frequency of the vehicle. Skin temperature detecting means for detecting the skin temperature of the driver of the vehicle, pulse rate detecting means for detecting the pulse rate of the driver of the vehicle, skin potential information detected by the skin potential detecting means, and the steering The physical condition of the driver is determined based on the steering frequency information detected by the frequency detection means, the skin temperature information detected by the skin temperature detection means, and the pulse rate information detected by the pulse rate detection means. It is characterized by having a physical condition determining means.

Further, in the vehicle physical condition detecting device of the present invention according to claim 8, in the configuration of claim 7, the physical condition determining means sets a skin potential reference value which is a reference of the skin potential value. Skin potential reference value setting means, the skin potential of the detected skin potential based on the skin potential information detected by the skin potential detecting means and the skin potential reference value set by the skin potential reference value setting means Skin potential reduction rate calculating means for calculating the reduction rate from the reference value, and skin potential reduction rate for determining the skin potential reduction rate based on the skin potential reduction rate information from the skin potential reduction rate calculation step A steering frequency-corresponding physical condition lowering rate determining unit for determining a steering frequency-corresponding physical condition lowering rate based on the steering frequency information detected by the steering frequency detecting unit, and a skin temperature serving as a reference for the skin temperature value. Set reference value A skin temperature reference value setting means for,
The rate of change of the detected skin temperature from the skin temperature reference value is calculated based on the skin temperature information detected by the skin temperature detection means and the skin temperature reference value set by the skin temperature reference value setting means. Skin temperature change rate calculating means, based on the skin temperature change rate information from the skin temperature change rate calculating means, the skin temperature corresponding physical condition decrease rate determining means for determining the skin temperature corresponding physical condition decrease rate, the pulse rate Pulse rate reference value setting means for setting a pulse rate reference value as a value reference, pulse rate information detected by the pulse rate detection means, and pulse rate reference value set by the pulse rate reference value setting means Based on the pulse rate change rate calculating means for calculating the rate of change of the detected pulse rate from the pulse rate reference value, and the pulse rate corresponding to the pulse rate change rate information from the pulse rate change rate calculating means. Physical condition corresponding to pulse rate Bottom rate determining means, the skin potential corresponding physical condition lowering rate determining means, the steering frequency corresponding physical condition lowering rate determining means, the skin temperature corresponding physical condition lowering rate determining means, and the pulse rate corresponding physical condition lowering rate determining means. Comprehensively comprising a physical condition deterioration judging means for judging whether or not the physical condition of the driver is deteriorated, and the skin potential corresponding physical condition deterioration rate judging means corresponds to the increase in the skin potential decreasing ratio The potential-corresponding physical condition lowering rate is determined to be larger, and the steering frequency-corresponding physical condition lowering rate determining means determines the steering frequency-corresponding physical condition lowering rate to be larger in response to the decrease in the steering frequency, and the skin The temperature-corresponding physical condition decrease rate determining means determines the skin temperature-corresponding physical condition decreasing rate to be larger in response to the increase in the skin temperature change rate, and the pulse rate-corresponding physical condition lowering rate determining means determines the pulse rate. Supports an increasing rate of change It is characterized by being configured to determine the larger one of the pulse rate corresponding physical condition reduction rate Te.

According to a ninth aspect of the present invention, there is provided a vehicle physical condition detecting apparatus according to the seventh or eighth aspect, wherein the skin potential detecting means, the skin temperature detecting means and the pulse rate detecting means are The wristband worn on the wrist of the driver and the glove worn on the palm of the driver are provided, and the physical condition determination means is installed on the vehicle side to detect the skin potential detection means and the skin temperature. It is characterized in that information is exchanged between the detecting means and the pulse rate detecting means and the physical condition determining means via radio waves.

According to a tenth aspect of the present invention, there is provided the vehicle physical condition detecting device according to the second aspect, wherein the steering frequency information is detected by the steering frequency detecting means. On the basis of the aforesaid steering frequency has a predetermined level, the driver has an awakening judging means for judging that the driver is in an awake state, and the skin potential reference value setting means makes the driver awake by the awakening judging means. It is characterized in that the latest value of the skin potential detected by the skin potential detecting means when it is determined to be present is set as the skin potential reference value.

According to an eleventh aspect of the present invention, there is provided the vehicle physical condition detecting device according to any one of the second, third, fifth, sixth, eighth and ninth aspects, wherein the physical condition deterioration determining means is It is characterized in that it is set so that the total value of the physical condition deterioration rate is compared with a judgment reference value, and if the total value reaches the judgment reference value, it is judged that the physical condition of the driver is deteriorated. .

According to a twelfth aspect of the present invention, there is provided the vehicle physical condition detecting apparatus according to the eleventh aspect, wherein the determination reference value is variably set so as to decrease as the operating time of the vehicle elapses. It is characterized by

[0021]

In the above-mentioned physical condition detecting device for a vehicle of the present invention, the skin potential detecting means detects the skin potential of the driver of the vehicle and the steering frequency detecting means detects the steering frequency of the vehicle. The physical condition determining means determines the physical condition of the driver based on the skin potential information detected by the skin potential detecting means and the steering frequency information detected by the steering frequency detecting means.

Further, in the vehicle detection device of the present invention as set forth in claim 2, in the physical condition determination means, the skin potential reference value setting means sets a skin potential reference value serving as a reference of the skin potential value, and then The skin potential decrease rate calculating means, based on the skin potential information detected by the skin potential detecting means and the skin potential reference value set by the skin potential reference value setting means, the skin of the detected skin potential. The rate of decrease from the potential reference value is calculated.

Further, the skin potential-corresponding physical condition lowering rate determining means determines the skin potential-corresponding physical condition lowering rate based on the skin potential lowering rate information from the skin potential lowering rate calculating means. At this time, the skin potential-corresponding physical condition lowering rate determination means determines the skin potential corresponding physical-body lowering rate to be larger in response to the increase in the skin potential lowering ratio. Further, the steering frequency-corresponding physical condition deterioration rate determining unit determines the steering frequency-corresponding physical condition deterioration rate based on the steering frequency information detected by the steering frequency detecting unit. At this time, the steering frequency-corresponding physical condition lowering rate determination means determines the steering frequency-corresponding physical condition lowering rate to be larger in response to the decrease in the steering frequency.

In the physical condition deterioration determining means, it is determined whether or not the physical condition of the driver is deteriorated by integrating the determination information from the skin potential corresponding physical condition lowering rate determining means and the steering frequency corresponding physical condition lowering rate determining means. To do. Further, in the vehicle physical condition detecting device of the present invention according to claim 3, the wrist band worn on the wrist of the driver and the skin potential detecting means provided on the glove worn on the palm of the driver. Information is exchanged with the physical condition determination means installed on the vehicle side via radio waves.

In the vehicle physical condition detecting device according to the present invention, the skin temperature detecting means detects the skin temperature of the driver of the vehicle, and the pulse rate detecting means detects the pulse rate of the driver of the vehicle. And the physical condition determination means determines the physical condition of the driver based on the skin temperature information detected by the skin temperature detection means and the pulse rate information detected by the pulse rate detection means.

Further, in the vehicle physical condition detecting device of the present invention according to claim 5, in the physical condition determining means, the skin temperature reference value setting means sets a skin temperature reference value serving as a reference of the skin temperature value, Then, the skin temperature decrease rate calculating means, based on the skin temperature information detected by the skin temperature detecting means and the skin temperature reference value set by the skin temperature reference value setting means, the detected skin temperature The rate of decrease from the skin temperature reference value is calculated.

Then, the skin temperature-corresponding physical condition decrease rate determining means determines the skin temperature-corresponding physical condition decrease rate based on the skin temperature change rate information from the skin temperature change rate calculating means. At this time, the skin temperature-corresponding physical condition decrease rate determining unit determines the skin temperature-corresponding physical condition decrease rate to be larger in response to the increase in the skin temperature change rate. On the other hand, the pulse rate reference value setting means sets a pulse rate reference value serving as a reference for the value of the pulse rate, and then the pulse rate change rate calculating means and the pulse rate information detected by the pulse rate detecting means and the pulse rate information. The rate of change of the detected pulse rate from the pulse rate reference value is calculated based on the pulse rate reference value set by the pulse rate reference value setting means.

Then, the pulse rate-corresponding physical condition deterioration rate determining means determines the pulse rate-corresponding physical condition deterioration rate based on the pulse rate change rate information from the pulse rate change rate calculating means. At this time, the pulse rate-corresponding physical condition decrease rate determining means determines the pulse rate-corresponding physical condition decrease rate to be larger in response to the increase in the pulse rate change rate. The physical condition deterioration determining unit determines whether or not the physical condition of the driver is deteriorated by integrating the determination information from the skin temperature corresponding physical condition decrease ratio determining unit and the pulse rate corresponding physical condition decrease ratio determining unit.

Further, in the vehicle physical condition detecting device of the present invention according to claim 6, the skin temperature detecting means and the pulse rate detecting means provided on the wrist band worn on the wrist of the driver, and the vehicle body. Information is exchanged with the physical condition determination means installed on the side via radio waves. Further, in the physical condition detecting device for a vehicle of the present invention according to claim 7, the skin potential detecting means detects the skin potential of the driver of the vehicle, and the steering frequency detecting means detects the steering frequency of the vehicle to determine the skin temperature. The detecting means detects the skin temperature of the driver of the vehicle, and the pulse rate detecting means detects the pulse rate of the driver of the vehicle. Then, the skin potential information detected by the skin potential detecting means, the steering frequency information detected by the steering frequency detecting means, the skin temperature information detected by the skin temperature detecting means, and the pulse rate detecting means. Based on the detected pulse rate information, the physical condition determination means,
The physical condition of the driver is judged.

Further, in the vehicle physical condition detecting device of the present invention according to claim 8, in the physical condition determining means, the skin potential reference value setting means sets a skin potential reference value serving as a reference of the value of the skin potential, Then, the skin potential decrease rate calculating means, based on the skin potential information detected by the skin potential detecting means and the skin potential reference value set by the skin potential reference value setting means, the detected skin potential The rate of decrease from the skin potential reference value is calculated.

Further, the skin potential-corresponding physical condition lowering rate determining means determines the skin potential-corresponding physical condition lowering rate based on the skin potential lowering rate information from the skin potential lowering rate calculating means. At this time, the skin potential-corresponding physical condition lowering rate determination means determines the skin potential corresponding physical-body lowering rate to be larger in response to the increase in the skin potential lowering ratio. Further, the steering frequency-corresponding physical condition deterioration rate determining unit determines the steering frequency-corresponding physical condition deterioration rate based on the steering frequency information detected by the steering frequency detecting unit. At this time, the steering frequency-corresponding physical condition lowering rate determination means determines the steering frequency-corresponding physical condition lowering rate to be larger in response to the decrease in the steering frequency.

Further, the skin temperature reference value setting means sets a skin temperature reference value serving as a reference for the value of the skin temperature, and then,
The skin temperature decrease rate calculating means, based on the skin temperature information detected by the skin temperature detecting means and the skin temperature reference value set by the skin temperature reference value setting means, the skin temperature of the detected skin temperature. The rate of decrease from the standard value is calculated. Then, the skin temperature-corresponding physical condition decrease rate determining unit determines the skin temperature-corresponding physical condition decrease rate based on the skin temperature change rate information from the skin temperature change rate calculating unit. At this time, the skin temperature-corresponding physical condition decrease rate determining unit determines the skin temperature-corresponding physical condition decrease rate to be larger in response to the increase in the skin temperature change rate.

On the other hand, the pulse rate reference value setting means sets a pulse rate reference value serving as a reference for the value of the pulse rate, and then the pulse rate change rate calculating means detects the pulse rate detected by the pulse rate detecting means. The rate of change of the detected pulse rate from the pulse rate reference value is calculated based on the information and the pulse rate reference value set by the pulse rate reference value setting means. Then, the pulse rate-corresponding physical condition deterioration rate determining unit determines the pulse rate-corresponding physical condition deterioration rate based on the pulse rate change rate information from the pulse rate change rate calculating unit. At this time, the pulse rate-corresponding physical condition decrease rate determining means determines the pulse rate-corresponding physical condition decrease rate to be larger in response to the increase in the pulse rate change rate.

The physical condition deterioration determining means determines from the skin potential corresponding physical condition decreasing rate determining means, the steering frequency corresponding physical condition decreasing rate determining means, the skin temperature corresponding physical condition decreasing rate determining means, and the pulse rate corresponding physical condition decreasing rate determining means. The information is comprehensively determined to determine whether the physical condition of the driver is deteriorated. Further, in the vehicle physical condition detecting device of the present invention according to claim 9, the skin potential detecting means provided on the wrist band worn on the wrist of the driver and the glove worn on the palm of the driver, Information is exchanged between the skin temperature detecting means and the pulse rate and information with the physical condition determining means installed on the vehicle side via radio waves.

Further, in the vehicle physical condition detecting device according to the present invention, the awakening judging means determines that the steering frequency has a predetermined level based on the steering frequency information detected by the steering frequency detecting means. It is determined that the driver is awake. When the awakening determination means determines that the driver is in an awake state, the skin potential reference value setting means sets the latest skin potential value detected by the skin potential detection means to the skin potential reference value. Set.

Further, in the vehicle physical condition detecting device of the present invention according to claim 11, the physical condition deterioration determining means compares the total value of the respective physical condition deterioration rates with a determination reference value, and the total value is the determination standard. When the value is reached, it is determined that the physical condition of the driver has deteriorated. Further, in the vehicle physical condition detecting device of the present invention according to claim 12, the determination reference value is variably set so as to become smaller as the operating time of the vehicle elapses, and the physical condition deterioration determining means determines each physical condition deterioration. When the total value of the rates reaches such a judgment reference value, it is judged that the physical condition of the driver has deteriorated.
Therefore, as the driving time of the vehicle elapses, the deterioration of the physical condition of the driver is determined earlier at the stage where the physical deterioration rate is low.

[0037]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A vehicle physical condition detecting device as an embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram schematically showing the structure, and FIG. 2 is a functional structure of a detecting system. FIG. 3 is a schematic block diagram of the interior of the vehicle showing an example of the installation state, FIG. 4 is a characteristic diagram for obtaining the physical condition change rate from the skin temperature change in this device, and FIG. FIG. 6 is a characteristic diagram for obtaining the physical condition change rate from the number change, FIG. 6 is a characteristic diagram for obtaining the awakening degree reduction rate from the skin potential reduction rate, and FIG. 7 is a characteristic for obtaining the awakening degree reduction rate from the handle operation frequency. FIG. 8 is a diagram showing a specific example of the steering wheel operation for explaining the steering wheel operating frequency, FIG. 9 is a characteristic diagram for setting a judgment reference value for the driving time, and FIGS. For explaining the physical condition detection procedure Is a low chart.

As shown in FIG. 1, the vehicle physical condition detecting device of the present embodiment has a glove-shaped sensor (hereinafter referred to as a glove sensor) 1 and a wristwatch type sensor (also referred to as a wristband) 2 worn by a driver. And the vehicle body side device 3. Note that, in FIG. 1, the control circuit portion 2A provided in the wrist sensor 2 is illustrated in parallel with the external configuration and the circuit configuration.

The glove sensor 1 and the wristwatch type sensor 2 are connected to each other by a connecting cord 1A. As shown in FIG. 3, the glove sensor 1 is on the palm of the driver and the wristwatch type sensor 2 is on the wrist of the driver. Be attached to. Further, the glove sensor 1 and the wristwatch type sensor 2 are separated from the vehicle body side device 3, but can transmit signals to the vehicle body side device 3 through radio waves.

The glove sensor 1 and the wristwatch type sensor 2 are provided with electrodes 10 and 11 as skin potential detecting means (skin potential sensors), respectively. Further, the wristwatch type sensor 2 is further provided with a thermistor 12 as a skin temperature detecting means (skin temperature sensor) and a piezoelectric element 13 as a pulse rate detecting means (pulse rate sensor).

Of these, the electrode 10 provided on the glove sensor 1 is for detecting the potential of the palm of the driver, and the electrode 11 provided on the wristwatch type sensor 2 is the electrode on the wrist of the driver. The electric potential of is detected. These electrodes 1
The detection results of 0 and 11 are input to the operation amplifier 14 provided in the control circuit portion 2A of the wristwatch type sensor 2, the difference is amplified, and then the high-pass component is removed by the low-pass filter 15, and then A / D conversion is performed. The digital signal is converted by the device 16 and read by the microcomputer 17.

The thermistor 12 converts the skin temperature into a voltage and detects it. The detection result is the control circuit portion 2A.
18 consisting of a resistor and an OP amplifier provided in the
After being amplified by, the high-frequency component is removed by the low-pass filter 19, it is converted into a digital signal by the A / D converter 20 and read by the microcomputer 17.

Further, the piezoelectric element 13 is for converting the fluctuation of the pressure of the artery of the wrist into a voltage and detecting it, and the detection result is detected by the amplifier 21 including the resistor and the OP amplifier in the wristwatch type sensor 2. Amplified and then low pass filter 2
After removing the high frequency component in 2, the A / D converter 23 converts the digital signal into a digital signal which is read by the microcomputer 17, and the microcomputer 17 calculates the pulse rate from the generation interval of the maximum value of the detected pressure. It has become.

The microcomputer 17 sends each information of the read skin potential, the skin temperature and the calculated pulse rate from the transmitter 24.
It is transmitted to the vehicle body side device 3 shown in the lower part of FIG. In the vehicle body side device 3, the receiver 25 receives each information of the skin potential, the skin temperature and the pulse rate transmitted through the transmitter 24, and these information and the steering angle information from the steering wheel angle sensor 4,
By processing the driving time information from the timer 5 and the driving time information by the microcomputer 26 as a physical condition judging means, the modulation of the physical condition of the driver is detected.

Therefore, the microcomputer (physical condition determining means) 26
Are configured as shown in FIG. That is, the microcomputer 26 includes, in the skin potential corresponding determination system 27 for obtaining the physical condition decrease rate according to the skin potential, the steering frequency corresponding determination system 28 for obtaining the physical condition decrease rate according to the steering frequency, and the physical condition corresponding to the skin temperature. A skin temperature-correspondence determination system 29 for obtaining a reduction rate, and a pulse rate-correspondence determination system 30 for obtaining a physical condition reduction rate according to a pulse rate,
Each of these determination systems is provided with physical condition deterioration determining means 26A for determining deterioration of the physical condition of the driver.

The skin potential correspondence determination system 27 is calculated by the skin potential reference value calculating means 27A for calculating the skin potential reference value E ₀ from the skin potential information from the wristwatch type sensor 2 and the skin potential reference value calculating means 27A. Skin potential reduction rate calculating means for calculating the reduction rate E of the detected skin potential E _{i from} the skin potential reference value E _{0 based on} the skin potential reference value E ₀ and the skin potential information (detected skin potential data). 27B and a skin potential-corresponding physical condition lowering rate determining unit 27C that determines the skin potential-corresponding physical condition lowering rate E _D based on the skin potential lowering rate E from the skin potential lowering rate calculating unit 27B.

Of these, the skin potential reference value calculating means 27A
Then, the wakefulness determining means 28C described later sets the latest skin potential value detected when the driver determines that the driver is in the wakeful state to the skin potential reference value E ₀ . The skin potential reference value E ₀ is constantly updated when the driver is awake, but since it corresponds to the initial value for each march, the skin potential reference value E ₀ is also referred to as the skin potential initial value hereinafter. .

The skin potential decrease rate calculating means 27B calculates the skin potential decrease rate E from the following equation (1). E = [(E ₀ −E _i ) / E ₀ ] × 100 (%) (1) Further, the skin potential-corresponding physical condition deterioration rate determining means 27C uses, for example, a map as shown in FIG. From the skin potential decrease rate E, the awakening degree decrease rate E _D as a physical condition decrease rate is obtained.
As shown in the figure, the rate of decrease in arousal level E _D is the rate of decrease in skin potential E
Is set to be proportional to, and when the skin potential decrease rate E reaches a predetermined value, the awakening degree decrease rate E _D reaches 1 (maximum value). That is, it is determined that the greater the skin potential reduction rate E, the lower the arousal level.

The steering frequency correspondence determination system 28 includes a steering frequency calculation means 28A for calculating the steering frequency S from the steering angle information from the steering angle sensor (steering wheel angle sensor) 4, and steering calculated by the steering frequency calculation means 28A. The steering frequency-corresponding physical condition lowering rate determining unit 28B for obtaining the steering frequency-corresponding physical condition lowering rate S _D based on the frequency S, and the driver in the awake state when the steering frequency S has a predetermined level based on the steering frequency S. The awakening determination means 28C for determining Reference numeral 4A is a steering angle sensor 4 and a steering frequency calculation means 2
8A and steering frequency detecting means.

Of these, in the steering frequency calculation means 28A,
Number of steering operations per unit time (number of steering wheel operations)
S _n is set to the steering frequency S, and this steering frequency S is the number of minute steering corrections that are always performed at the time of awakening. That is, the steering frequency calculation means 28A is operated so as to change to the left or right by a predetermined steering angle (a minute and significant value), and the steering direction is changed from left to right or from right. When it is changed to the left direction, this is counted as one steering operation, the number N of times of this steering operation is counted within a predetermined time T, and then the steering operation per unit time (here, 1 second). The number of times N / T (times / second) is calculated, and this is set as the steering frequency S = N / T.

For example, when the steering wheel angle changes over 2 ° or more is set as the steering operation count condition, the sampling time T is set to 15 seconds. In this case, if the steering operation as shown in FIG. 8 is performed, the case where a circle mark is added in the figure is counted as the steering operation. That is, when the steering wheel angle is first steered from 0 ° to the left and then changed to the right steering when the steering angle exceeds 2 °, the steering operation is counted here. Further, when the right steering is changed from 2 ° to 0 ° or less and the steering is changed to the left steering, the steering operation is counted here. Furthermore, after this, the steering wheel is switched from left steering to right steering, and from right steering to left steering. However, since the steering wheel angle does not change over 2 ° or more in either of these cases, the steering wheel angle is not counted and the steering wheel angle is changed. The steering operation is counted when the steering wheel is turned leftward from less than 2 ° to more than 4 ° and switched to rightward steering. In this way, in the example shown in FIG. 8, the steering is performed 5 times in 15 seconds.

Further, the steering frequency-corresponding physical condition deterioration rate determining means 2
In 8B, a wakefulness decrease rate S _D as a physical condition decrease rate is obtained from the steering frequency S using a map as shown in FIG. 7, for example. As shown in the figure, the awakening degree decrease rate S _D becomes 1 (maximum value) when the steering frequency S is less than or equal to the first reference value (S = 1 in this example), and the steering frequency S is the first reference value. Value (=
When it exceeds 1), it gradually decreases to the second reference value (= 2).
In the above, it is set to be 0. That is, when the minute steering correction that is generally performed at the time of awakening is not performed, it is determined that the awakening degree has decreased.

The skin temperature correspondence judgment system 29 is calculated by the skin temperature reference value calculating means 29A for calculating the skin temperature reference value H ₀ from the skin temperature information from the wristwatch type sensor 2 and the skin temperature reference value calculating means 29A. Change (increased amount) ΔH of the detected skin temperature H _{i from} the skin temperature reference value H _{0 based on} the skin temperature reference value H ₀ and the skin temperature information (detected skin temperature data) Calculation means 29B
And the skin temperature change Δ from the skin temperature change calculation means 29B.
Based on H, it is composed of skin temperature corresponding health drop rate H _D and a determining skin temperature corresponding physical condition drop rate determination unit 29C.

Of these, the skin temperature reference value calculating means 29A
Then, the average value of the skin temperature sampled at a predetermined time at the time of awakening is set as the skin temperature reference value H _0. Here, the average value of the skin temperature sampled for 20 minutes immediately after the start of operation is set as the skin temperature reference value H _{0. It} is set as ₀ . Specifically, the skin temperature reference value H ₀ is obtained by dividing the skin temperature added value H _n sampled for 20 minutes by the number of times of sampling.

Further, the skin temperature change calculating means 29B
The skin temperature change ΔH is calculated from the following equation (2). ΔH = H _i −H ₀ (2) Further, the skin temperature-corresponding physical condition deterioration rate determining unit 29C uses, for example, a map as shown in FIG.
Request physical condition reduction rate H _D from H. As shown, physical condition reduction rate H _D is set to be proportional with the skin temperature change [Delta] H, skin temperature change [Delta] H is reached, the physical condition reduction rate H _D to a predetermined value reaches 0.1 (maximum value) It is like this. That is, the larger the change in skin temperature (amount of increase in skin temperature) ΔH, the lower the arousal level is determined to be.

The pulse rate correspondence determination system 30 is calculated by the pulse rate reference value calculating means 30A for calculating the pulse rate reference value P ₀ from the pulse rate information from the wristwatch type sensor 2 and the pulse rate reference value calculating means 30A. From the pulse rate reference value P ₀ and the pulse rate information (detected pulse rate data), a change (here, an increase amount) ΔP in the detected pulse rate P _{i from} the pulse rate reference value P ₀ is calculated. The pulse rate change calculating unit 30B and the pulse rate corresponding physical condition lowering rate determining unit 30C for determining the pulse rate corresponding physical condition lowering rate P _D based on the pulse rate change ΔP from the pulse rate change calculating unit 30B. .

Among these, the pulse rate reference value calculating means 30A sets the average value of the pulse rate sampled at a predetermined time during awakening as the pulse rate reference value P ₀ , but here, it is set to 20 minutes immediately after the start of operation. The average value of the sampled pulse rates is set as the pulse rate reference value P ₀ . Specifically, the pulse rate reference value P ₀ is obtained by dividing the pulse rate addition value P _n sampled for 20 minutes by the number of times of sampling.

The pulse rate change calculating means 30B calculates the pulse rate change ΔP from the following equation (3). ΔP = P _i −P ₀ (3) Further, in the pulse rate-corresponding physical condition decrease rate determining unit 30C, the physical condition decrease rate P _D is calculated from the pulse rate change ΔP using a map as shown in FIG. 5, for example. Ask. As shown in the figure, the physical condition deterioration rate P _D becomes 0.3 (maximum value) when the pulse rate change ΔP is less than or equal to the first negative reference value (ΔP = −20 in this example), and the pulse rate change It is set so that when ΔP exceeds the first reference value (= -20), it gradually decreases, and becomes 0 when the second reference value (= -10) or more. That is, it is determined that the greater the change in pulse rate (that is, the amount of decrease in pulse rate) ΔP, the lower the arousal level. As shown in the figure, the physical condition decrease rate P _D is set to be proportional to the pulse rate change ΔP, and when the pulse rate change ΔP reaches a predetermined value, the physical condition decrease rate P _D reaches 1 (maximum value). Has become.

In the physical condition decrease judging means 26, the skin potential corresponding physical condition decrease rate judging means 27C, the steering frequency corresponding physical condition decrease rate judging means 28B, and the skin temperature corresponding physical condition decrease rate judging means 29.
C, the physical condition reduction rate E _D from pulse rate corresponding physical condition reduction rate determination means 30C, S _D, H _D, are input to P _D, by adding them to calculate the total physical condition reduction rate W. Then, when the overall physical condition deterioration rate W is larger than the determination reference value W ₀ , it is determined that the physical condition of the driver is deteriorated, and this result is output to the display device 7, the alarm device 8 and the air conditioner 9. It has become.

In particular, the judgment reference value W _{0 for} deterioration of physical condition is variably set so as to become smaller as the driving time of the vehicle elapses. Here, as shown in FIG. 9, the judgment reference value W ₀ is judged according to the driving time T _2. Using a map in which the reference value (boundary line in the figure) W ₀ is variable, the deterioration of the physical condition of the driver is determined based on the overall physical condition deterioration rate W and the driving time information T ₂ from the timer 5. Has become. In addition to the timer (count value T ₂ ) which starts counting when the key switch 31 of the vehicle is input, the timer 5 is a timer for sampling steering angle (count value T ₁ ) for calculating the steering frequency. )
It can be provided.

Further, the display device 7 gives an alarm display of the deterioration of the physical condition of the driver, the alarm device 8 gives an alarm of the deterioration of the physical condition of the driver, and the air conditioner 9 blows cool air when the physical condition of the driver is deteriorated. The driver is then warned. Since the vehicle physical condition detecting device as one embodiment of the present invention is configured as described above, the physical condition detecting device for the driver is detected while operating the microcomputer 26, for example, in the procedure shown in the flowcharts of FIGS. Can be done.

The detection operation is started by the start of operation. First, in step S1, the two timers T of the timer 5 are
_{When 1} and T ₂ are reset, the counting is started at the same time,
Further, the skin potential initial value E _o is read, and the handle operation number S _n , pulse rate additional value P _n , and skin temperature additional value H _n are reset to zero. Then, in step S2, the pulse rate P _i and the skin temperature H _i are read. In step S3, T ₂ ≦ 20
If it is (minute), the process proceeds to step S4, and T ₂ > 20 (minute)
If so, the process proceeds to step S8. In step S4, P _n
The P _i to be respectively added to H _i to H _n. Step S
In 5, if T ₂ = 20 (minutes), the process proceeds to step S6, and if T ₂ <20 (minutes), the process proceeds to step S7.

At step S6, P_nAveraged over 20 minutes
Pulse rate reference value P_oAnd calculate H_nTo
Averaged over 20 minutes, skin temperature reference value H_oCalculate
It Also, T₁To reset. In step S7, P
_i, H_iIs displayed on the display 7 and the process returns to step S2.
In this way, the pulse rate is standardized in the first 20 minutes after the start of operation.
Value P_o, Skin temperature reference value H_oTo detect. After starting operation 2
If it exceeds 0 minutes, the process proceeds from step S3 to step S8.
Mu. In step S8, detection from the steering wheel angle sensor 4
Steering angle Θ_iRead. In step S9, Θ_iTwice
If it is above, proceed to step S10, and if not, go to step S10.
Go to step S11. In step S10, S_nThe value of
Increase by 1. Note that the work in steps S8, S9, and S10
When the driver's alertness decreases, the steering wheel operation becomes rough
It means that the number of small handle operations more than twice is reduced.
It is for use, in the example of handle operation shown in FIG.
Is S when the circle is added _nIs incremented
It

In step S11, if T ₁ = 15 seconds, the process proceeds to step S12, and if T ₁ <15 seconds, the process returns to step S7. In step S12, the steering wheel operation count S _n is averaged over 15 seconds to obtain the operation frequency S. In step S13, the pulse rate change ΔP which is the difference between P _o and P _i
Ask for. Next, at step S14, the physical condition deterioration rate P _D is calculated from ΔP from the graph shown in FIG. This is a work for utilizing that the pulse rate decreases as the physical condition deteriorates.

Subsequently, in step S15, the skin temperature change ΔH, which is the difference between H _i and H _o , is obtained, and further, step S1
6, FIG. 4 shows the graph to determine the physical condition reduction rate H _D than [Delta] H. This is a work for utilizing the fact that the skin temperature decreases as the physical condition deteriorates. In step S17, the microcomputer 26 reads the skin potential E _i . In step S18, if the steering frequency S <2, step S18
20. If not, proceed to step S19,
After substituting E _i for the initial skin potential value E _o , step S2
Go to 0.

This is because the rewriting of E _o is considered to be a normal awake state if S ≧ 2. Step S
At 20, the skin potential decrease rate E is obtained from E = (E _o −E _i ) / E _o × 100 (%), and then, in step S21, the awakening degree decrease rate E _D is obtained from E from the graph shown in FIG. . It should be noted that this is a work for utilizing the fact that the skin potential decreases when the arousal level decreases.

Succeedingly, in a step S22, as shown in FIG.
From the graph, the awakening rate S is lower than S _DAsk for. Next
At step S23, from the graph shown in FIG.₂More judgment
Constant reference value W₀However, in this case, the operating time T₂
With the increase of₀Is decreasing. Su
In step S24, (H_D+ P_D+ E_D+ S_D) ≧ W₀
If so, it is determined that the physical condition is deteriorated, and step S25 is performed.
If not, it is judged that the physical condition is normal,
It proceeds to step S26.

In step S25, the microcomputer 26 warns the driver by displaying a warning on the display 7, issuing an alarm from the alarm 8, blowing cool air from the air conditioner 9, and the like. In step S26, T ₁ and S _n are reset. As described above, according to this embodiment, since the glove sensor and the wristwatch sensor are used, the skin potential, the skin temperature, and the pulse rate can be measured without being affected by the state of the driver's grip of the steering wheel. In addition, since four pieces of information such as skin potential, skin temperature, pulse rate, and steering frequency of the steering wheel are used in a complex manner, it is possible to more reliably determine the deterioration of the driver's physical condition, and to display, alarm, and control the air conditioner. Since the two methods are used, it is possible to reliably inform the driver of the deterioration in physical condition, and thereby the driver can be made to take appropriate measures.

In the present embodiment, the skin potential, skin temperature, pulse rate, steering wheel steering frequency and four pieces of information are used, but the physical condition of the driver is calculated based on only two pieces of information, the skin potential and the steering wheel steering frequency. The deterioration may be detected, or the deterioration of the physical condition of the driver may be detected based on only two pieces of information, the skin temperature and the pulse rate.

[0070]

As described above in detail, according to the physical condition detecting device for a vehicle of the first aspect of the present invention, the skin potential detecting means for detecting the skin potential of the driver of the vehicle and the steering frequency of the vehicle. Steering frequency detecting means for detecting the physical condition of the driver based on the skin potential information detected by the skin potential detecting means and the steering frequency information detected by the steering frequency detecting means. With such a configuration, it becomes possible to accurately determine the physical condition of the driver while using the skin potential information and the steering frequency information in combination.

Further, according to the physical condition detecting device for a vehicle of the present invention as defined in claim 2, in the structure of claim 1, the physical condition determining means sets a skin potential reference value serving as a reference of the skin potential value. Skin potential reference value setting means to be set, based on the skin potential information detected by the skin potential detecting means and the skin potential reference value set by the skin potential reference value setting means, the detected skin potential Skin potential reduction rate calculating means for calculating the reduction rate from the skin potential reference value, and skin potential corresponding physical condition for determining the skin potential reduction physical rate based on the skin potential reduction rate information from the skin potential reduction rate calculation means Reduction rate determining means, steering frequency-corresponding physical condition lowering rate determining means for determining a steering frequency-corresponding physical condition lowering rate based on steering frequency information detected by the steering frequency detecting means, and skin potential-corresponding physical condition lowering rate determining means And the Comprising the determination information from the rudder frequency corresponding physical condition deterioration rate determining means, with a physical condition deterioration determining means for determining whether or not the physical condition of the driver has deteriorated, the skin potential corresponding physical condition decreasing rate determination means, In response to the increase in the skin potential decrease rate, the skin potential corresponding physical condition decrease rate is determined to be larger, and the steering frequency corresponding physical condition decrease rate determining means corresponds to the steering frequency decrease. With the configuration in which the corresponding physical condition lowering rate is set to be determined to be larger, the physical condition lowering can be clearly detected from the skin potential lowering rate and the steering frequency lowering rate.

According to the vehicle physical condition detecting device of the present invention as set forth in claim 3, in the structure of claim 1 or 2, the skin potential detecting means is a wrist band worn on the wrist of the driver. And the glove that is attached to the palm of the driver, and the physical condition determining means is installed on the vehicle side so that information can be transmitted and received between the skin potential detecting means and the physical condition determining means. With this configuration, it is possible for the driver to detect skin potential information while freely moving his / her hand, and skin potential information such as the skin potential decrease rate while ensuring the freedom of driving. Through this, it becomes possible to clearly detect the deterioration of physical condition.

According to the vehicle physical condition detecting device of the present invention, the skin temperature detecting means for detecting the skin temperature of the vehicle driver and the pulse rate for detecting the pulse rate of the vehicle driver. The number detection means and the physical condition determination means for determining the physical condition of the driver based on the skin temperature information detected by the skin temperature detection means and the pulse rate information detected by the pulse rate detection means. Since the physical condition is determined by using the skin potential temperature information and the pulse rate information in combination, it is possible to detect the physical condition deterioration with high accuracy.

Further, according to the vehicle physical condition detecting device of the present invention as set forth in claim 5, in the configuration of claim 4, the physical condition determining means sets a skin temperature reference value serving as a reference of the skin temperature value. Skin temperature reference value setting means to be set, based on the skin temperature information detected by the skin temperature detecting means and the skin temperature reference value set by the skin temperature reference value setting means, the detected skin temperature Skin temperature change rate calculating means for calculating a change rate from the skin temperature reference value, and a skin temperature corresponding physical condition for determining a skin temperature corresponding physical condition decrease rate based on the skin temperature change rate information from the skin temperature change rate calculating means Decrease rate determining means, pulse rate reference value setting means for setting a pulse rate reference value serving as a reference for the pulse rate value, pulse rate information detected by the pulse rate detecting means, and the pulse rate reference value setting means With the pulse rate reference value set in Based on the pulse rate change rate calculating means for calculating the rate of change of the detected pulse rate from the pulse rate reference value, and the pulse rate corresponding to the pulse rate change rate information from the pulse rate change rate calculating means. The physical condition of the driver is deteriorated by integrating the determination information from the pulse rate corresponding physical condition decrease rate determining unit for determining the physical condition decrease rate, the skin temperature corresponding physical condition decrease rate determining unit and the pulse rate corresponding physical condition decrease rate determining unit. And a skin temperature-corresponding physical condition lowering rate determining means for increasing the skin temperature-corresponding physical condition lowering rate in response to an increase in the skin temperature change rate. Along with the determination, the pulse rate corresponding physical condition lowering rate determining means is set to determine the pulse rate corresponding physical condition lowering rate to be larger in response to an increase in the pulse rate change rate, the skin Temperature drop rate and pulse rate It is possible to detect clearly physical condition decreases from a lower rate.

Further, according to the vehicle physical condition detecting device of the present invention as defined in claim 6, in the structure of claim 4 or 5, the skin temperature detecting means and the pulse rate detecting means are the wrists of the driver. The physical condition determining means is provided on the wristband to be attached to the vehicle, and the physical condition determining means is installed on the vehicle side to exchange information between the skin temperature detecting means and the pulse rate detecting means, and the physical condition determining means. With this configuration, it is possible for the driver to detect skin temperature information and pulse rate information while freely moving his hand. It becomes possible to clearly detect the physical condition deterioration through the skin temperature information such as the above and the pulse rate information such as the rate of decrease of the pulse rate.

According to the vehicle physical condition detecting device of the present invention, the skin potential detecting means for detecting the skin potential of the driver of the vehicle and the steering frequency detecting means for detecting the steering frequency of the vehicle. A skin temperature detecting means for detecting the skin temperature of the driver of the vehicle, a pulse rate detecting means for detecting the pulse rate of the driver of the vehicle, and skin potential information detected by the skin potential detecting means, The physical condition of the driver based on the steering frequency information detected by the steering frequency detection means, the skin temperature information detected by the skin temperature detection means, and the pulse rate information detected by the pulse rate detection means. Since the physical condition determining means for determining the physical condition is provided, the physical condition is determined by using the skin potential information, the steering frequency information, the skin temperature information, and the pulse rate information in combination, so that the deterioration of the physical condition can be accurately detected. become.

Further, according to the vehicle physical condition detecting device of the present invention as set forth in claim 8, in the configuration of claim 7, the physical condition determining means sets a skin potential reference value serving as a reference of the skin potential value. Skin potential reference value setting means to be set, based on the skin potential information detected by the skin potential detecting means and the skin potential reference value set by the skin potential reference value setting means, the detected skin potential Skin potential reduction rate calculating means for calculating the reduction rate from the skin potential reference value, and skin potential corresponding physical condition for determining the skin potential reduction physical rate based on the skin potential reduction rate information from the skin potential reduction rate calculation means Decrease rate determining means, based on the steering frequency information detected by the steering frequency detecting means, the steering frequency corresponding physical condition decrease rate determining means for determining the steering frequency corresponding physical condition decrease rate, and the reference of the skin temperature value Skin temperature standard Based on the skin temperature reference value setting means for setting, the skin temperature information detected by the skin temperature detection means and the skin temperature reference value set by the skin temperature reference value setting means, the detected skin temperature Skin temperature change rate calculation means for calculating the change rate from the skin temperature reference value, and skin temperature correspondence for determining the physical temperature decrease rate based on the skin temperature change rate information from the skin temperature change rate calculation means Deterioration rate determination means, pulse rate reference value setting means for setting a pulse rate reference value serving as a reference for the pulse rate value, pulse rate information detected by the pulse rate detection means, and the pulse rate reference value setting Pulse rate change rate calculating means for calculating the rate of change of the detected pulse rate from the pulse rate reference value based on the pulse rate reference value set by the means, and the pulse rate from the pulse rate change rate calculating means Pulse rate based on rate change information Pulse rate corresponding physical condition decrease rate determining means for determining the physical condition decrease rate, the skin potential corresponding physical condition decrease rate determining means, the steering frequency corresponding physical condition decrease rate determining means, the skin temperature corresponding physical condition decrease rate determining means and the pulse rate The physical condition deterioration determining unit that determines whether the physical condition of the driver is deteriorated by integrating the determination information from the corresponding physical condition deterioration rate determining unit, and the skin potential corresponding physical condition decreasing rate determining unit is the skin Corresponding to an increase in the potential decrease rate, the skin potential corresponding physical condition decrease rate is determined to be larger, and the steering frequency corresponding physical condition decrease rate determining means corresponds to the steering frequency corresponding physical condition decrease. The skin temperature-corresponding physical condition decrease rate determining means determines that the skin temperature-corresponding physical condition decrease rate is larger and corresponds to the pulse rate. Corresponding physical condition deterioration rate The determining means is set so as to determine the decrease rate of the physical condition corresponding to the pulse rate to be larger in response to the increase in the rate of change of the pulse rate, so that the skin potential decrease rate, the steering frequency decrease rate, and the skin temperature are reduced. From the decrease rate and the pulse rate decrease rate, it becomes possible to clearly detect the decrease in physical condition.

Further, according to the vehicle physical condition detecting device of the present invention described in claim 9, in the configuration of claim 7 or 8, the skin potential detecting means, the skin temperature detecting means and the pulse rate detecting means are provided. Provided on a wristband worn on the driver's wrist and gloves worn on the driver's palm, and the physical condition determination means is installed on the vehicle side, and the skin potential detection means, Information is exchanged between the skin temperature detecting means and the pulse rate detecting means, and the physical condition determining means is set so as to be transmitted through radio waves, so that the skin potential can be set while the driver freely moves his / her hand. It becomes possible to detect information, skin temperature information, pulse rate information, etc., and while ensuring the freedom of driving, skin potential information such as skin potential decrease rate, skin temperature information such as skin temperature decrease rate, pulse rate decrease rate, etc. Through pulse rate information Te, clearly it is possible to detect the physical condition deteriorated.

According to the vehicle physical condition detecting device of the present invention as defined in claim 10, in the structure of any one of claims 2, 3, 8 and 9, the steering detected by the steering frequency detecting means. The awakening judging means for judging that the driver is in the awake state when the steering frequency has a predetermined level based on the frequency information, and the skin potential reference value setting means causes the driver to awaken by the awakening judging means. When the driver is in the awake state, the latest skin potential detected by the skin potential detecting means is set as the skin potential reference value to determine the latest skin potential when the driver is awake. Through the standard value,
It becomes possible to obtain a more effective skin potential reduction rate, and it becomes possible to detect the deterioration of the physical condition more accurately and clearly.

According to the vehicle physical condition detecting device of the present invention as defined in claim 11, in the configuration according to any one of claims 2, 3, 5, 6, 8 and 9, the physical condition deterioration determining means is By the configuration in which the total value of the respective physical condition deterioration rates is compared with a determination reference value, and when the total value reaches the determination reference value, it is determined that the physical condition of the driver is deteriorated, It becomes possible to easily and clearly detect a deterioration in physical condition.

According to the vehicle physical condition detecting device of the present invention as defined in claim 12, in the structure of claim 11,
By the configuration in which the determination reference value is variably set so as to become smaller as the driving time of the vehicle elapses, for a driver who loses a sense of tension as the driving time elapses and easily causes a decrease in arousal level. , It becomes possible to inform the physical condition early and appropriately.

[Brief description of drawings]

FIG. 1 is a block diagram schematically showing a configuration of a vehicle physical condition detecting device as an embodiment of the present invention.

FIG. 2 is a block diagram schematically showing a functional configuration of a detection system of the vehicle physical condition detection device as one embodiment of the present invention.

FIG. 3 is a schematic side view of a vehicle interior showing an example of an installed state of a vehicle physical condition detecting device as one embodiment of the present invention.

FIG. 4 is a characteristic diagram for obtaining a physical condition change rate from a skin temperature change in the vehicle physical condition detecting device as one embodiment of the present invention.

FIG. 5 is a characteristic diagram for obtaining a physical condition change rate from a pulse rate change in the vehicle physical condition detection device as one embodiment of the present invention.

FIG. 6 is a characteristic diagram for obtaining the awakening degree lowering rate from the skin potential lowering rate in the vehicle physical condition detecting device as one embodiment of the present invention.

FIG. 7 is a characteristic diagram for obtaining the awakening degree reduction rate from the steering wheel operation frequency in the vehicle physical condition detection device as one embodiment of the present invention.

FIG. 8 is a diagram showing a specific example of the steering wheel operation for explaining the steering wheel operation frequency in the vehicle physical condition detection device as one embodiment of the present invention.

FIG. 9 is a characteristic diagram for setting a determination reference value for driving time in the vehicle physical condition detection device as one embodiment of the present invention.

FIG. 10 is a flowchart for explaining a physical condition detection procedure of the vehicle physical condition detection device as one embodiment of the present invention.

FIG. 11 is a flowchart for explaining a physical condition detection procedure of the vehicle physical condition detection device as one embodiment of the present invention.

[Explanation of symbols]

1 glove sensor 1A connection cord 2 wristwatch type sensor 2A control circuit part 3 vehicle body side device 4 steering wheel angle sensor 4A steering frequency detecting means 5 timer 7 indicator 8 alarm device 9 air conditioner 10, 11 as skin potential detecting means (skin potential sensor) Electrodes 12 Thermistor as skin temperature detecting means (skin temperature sensor) 13 Piezoelectric element as pulse rate detecting means (pulse rate sensor) 14 Differential amplifier 15, 19, 22 Low pass filter 16, 20, 23 A / D converter 17,26 Microcomputer 18,21 Amplifier 24 Transmitter 25 Receiver 26 Microcomputer as physical condition determination means 26A Physical condition decrease determination means 27 Skin potential correspondence determination system 27A Skin potential reference value calculation means 27B Skin potential decrease rate calculation means 27C Skin potential correspondence Physical condition deterioration rate determination means 28 Steering frequency correspondence determination system 28A Rudder frequency calculation means 28B Steering frequency correspondence physical condition decrease rate determination means 28C Awakening determination means 29 Skin temperature correspondence judgment system 29A Skin temperature reference value calculation means 29B Skin temperature change calculation means 29C Skin temperature correspondence physical condition decrease rate judgment means 30 Pulse rate correspondence judgment System 30A Pulse rate reference value calculation means 30B Pulse rate change calculation means 30C Pulse rate corresponding physical condition decrease rate determination means 31 Key switch E Skin potential decrease rate E _D Skin potential corresponding physical condition decrease rate (awakening degree decrease rate) E _i Skin potential E _o Skin potential initial value as skin potential reference value H _D Skin temperature corresponding physical condition decrease rate H _i Skin temperature H _n Skin temperature added value H _o Skin temperature reference value ΔH Skin temperature change P _D Pulse rate corresponding physical condition decrease rate P _i pulse The number P _n pulse rate sum value ΔP pulse rate changes P _o pulse rate reference value S operation frequency S _D steering frequency corresponding physical condition reduction rate (awareness decrease rate) S _n handle Misao Number T _1, T ₂ timer W overall physical condition reduction rate W ₀ criterion value theta _i detected steering angle

Claims (12)

[Claims] 1. A skin potential detecting means for detecting a skin potential of a driver of a vehicle, a steering frequency detecting means for detecting a steering frequency of the vehicle, skin potential information detected by the skin potential detecting means and the steering. A physical condition detecting device for a vehicle, comprising: a physical condition determining device for determining the physical condition of the driver based on the steering frequency information detected by the frequency detecting device. 2. The skin condition reference value setting means for setting the skin potential reference value serving as a reference for the skin potential value, the skin potential information detected by the skin potential detecting means, and the skin. Skin potential reduction rate calculation means for calculating a reduction rate of the detected skin potential from the skin potential reference value based on the skin potential reference value set by the potential reference value setting means, and the skin potential reduction rate calculation The skin potential corresponding physical condition decrease rate determining means for determining the skin potential corresponding physical condition decrease rate based on the skin potential decreasing rate information, and the steering frequency correspondence based on the steering frequency information detected by the steering frequency detecting means. Steering frequency-corresponding physical condition lowering rate determining means for determining the physical condition lowering rate, judgment information from the skin potential corresponding physical condition lowering rate determining means, and steering frequency corresponding physical condition lowering rate determining means are combined to reduce the physical condition of the driver. Doing Whether the provided and determining the physical condition low down determination means, the determination on the skin potential response physical condition reduction rate determination means, larger ones the skin potential response health drop rate in response to the increase of the skin potential drop rate In addition, the steering frequency-corresponding physical condition deterioration rate determining means is set to determine the steering frequency-corresponding physical condition deterioration rate to be larger in response to the decrease in the steering frequency. Item 2. A vehicle physical condition detection device according to Item 1. 3. The skin potential detecting means is provided on a wristband worn on the driver's wrist and gloves worn on the palm of the driver, and the physical condition determining means is provided on the vehicle side. 3. The vehicle physical condition detection device according to claim 1 or 2, wherein the physical condition detection device for vehicles is set so that information is exchanged between the skin potential detecting device and the physical condition determining device via radio waves. apparatus. 4. A skin temperature detecting means for detecting a skin temperature of a vehicle driver, a pulse rate detecting means for detecting a pulse rate of the vehicle driver, and skin temperature information detected by the skin temperature detecting means. And a physical condition determination means for determining the physical condition of the driver based on the pulse rate information detected by the pulse rate detection means. 5. The skin temperature reference value setting means for setting the skin temperature reference value serving as a reference for the skin temperature value, the skin temperature information detected by the skin temperature detecting means, and the skin. A skin temperature change rate calculating means for calculating a change rate of the detected skin temperature from the skin temperature reference value based on the skin temperature reference value set by the temperature reference value setting means, and the skin temperature change rate calculation A skin temperature-corresponding physical condition decrease rate judging means for judging the skin temperature corresponding physical condition decrease rate based on the skin temperature change rate information from the means, and a pulse rate reference for setting a pulse rate reference value as a reference of the pulse rate value Value setting means, based on the pulse rate information detected by the pulse rate detecting means and the pulse rate reference value set by the pulse rate reference value setting means,
Based on the pulse rate change rate calculating means for calculating the rate of change of the detected pulse rate from the pulse rate reference value, and the pulse rate corresponding physical condition decrease rate based on the pulse rate change rate information from the pulse rate change rate calculating means. Whether the driver's physical condition is deteriorated by integrating the determination information from the pulse rate corresponding physical condition decrease rate determining unit, the skin temperature corresponding physical condition decrease rate determining unit and the pulse rate corresponding physical condition decrease rate determining unit A physical condition decrease determining means for determining whether or not the skin temperature corresponding physical condition decrease rate determining means determines the skin temperature corresponding physical condition decrease rate to be larger in response to an increase in the skin temperature change rate. The pulse rate-corresponding physical condition decrease rate determining means is set to determine the pulse rate-corresponding physical condition decrease rate to be larger in response to an increase in the pulse rate change rate. Item 4. Physical condition detection for vehicle according to item 4 Location. 6. The skin temperature detecting means and the pulse rate detecting means are provided on a wristband worn on the wrist of the driver, and the physical condition determining means is installed on the vehicle side, The physical condition for a vehicle according to claim 4 or 5, wherein information is exchanged between the temperature detecting device, the pulse rate detecting device, and the physical condition determining device via radio waves. Detection device. 7. A skin potential detecting means for detecting a skin potential of a driver of a vehicle, a steering frequency detecting means for detecting a steering frequency of the vehicle, and a skin temperature detecting means for detecting a skin temperature of a driver of the vehicle. Pulse rate detection means for detecting the pulse rate of the driver of the vehicle, skin potential information detected by the skin potential detection means, steering frequency information detected by the steering frequency detection means, and skin temperature A vehicle having a physical condition determination means for determining the physical condition of the driver based on the skin temperature information detected by the detection means and the pulse rate information detected by the pulse rate detection means. Physical condition detector. 8. The skin condition reference value setting means for setting the skin potential reference value serving as a reference for the value of the skin potential, the skin potential information detected by the skin potential detecting means, and the skin. Skin potential reduction rate calculation means for calculating a reduction rate of the detected skin potential from the skin potential reference value based on the skin potential reference value set by the potential reference value setting means, and the skin potential reduction rate calculation The skin potential corresponding physical condition decrease rate determining means for determining the skin potential corresponding physical condition decrease rate based on the skin potential decreasing rate information, and the steering frequency correspondence based on the steering frequency information detected by the steering frequency detecting means. Steering frequency-corresponding physical condition decrease rate determining means for determining the physical condition decrease rate, skin temperature reference value setting means for setting a skin temperature reference value serving as a reference for the skin temperature value, and skin detected by the skin temperature detecting means Temperature information And a skin temperature change rate calculating means for calculating a change rate of the detected skin temperature from the skin temperature reference value based on the skin temperature reference value set by the skin temperature reference value setting means, and the skin temperature Based on the skin temperature change rate information from the change rate calculation means, a skin temperature corresponding physical condition decrease rate determining means for determining a skin temperature corresponding physical condition decrease rate and a pulse rate reference value serving as a reference of the pulse rate value are set. Based on the pulse rate reference value setting means, the pulse rate information detected by the pulse rate detecting means and the pulse rate reference value set by the pulse rate reference value setting means,
Based on the pulse rate change rate calculating means for calculating the rate of change of the detected pulse rate from the pulse rate reference value, and the pulse rate corresponding physical condition decrease rate based on the pulse rate change rate information from the pulse rate change rate calculating means. Pulse rate corresponding physical condition decrease rate determining means, skin potential corresponding physical condition decrease rate determining means, steering frequency corresponding physical condition decrease rate determining means, skin temperature corresponding physical condition decrease rate determining means and pulse rate corresponding physical condition decrease rate The physical condition deterioration determining means for determining whether or not the physical condition of the driver is deteriorated by integrating the determination information from the determining means, and the skin potential corresponding physical condition lowering rate determining means determines the skin potential lowering rate. Corresponding to the increase, the skin potential corresponding physical condition lowering rate is determined to be larger, and the steering frequency corresponding physical condition lowering rate determining means increases the steering frequency corresponding physical condition lowering rate to correspond to the decrease of the steering frequency. The skin temperature The corresponding physical condition decrease rate determining means determines the skin temperature corresponding physical condition decrease rate to be larger in response to the increase in the skin temperature change rate, and the pulse rate corresponding physical condition decrease rate determining means determines the pulse rate change. 8. The vehicle physical condition detecting device according to claim 7, wherein the physical condition detecting device for a vehicle according to claim 7 is set so as to determine the pulse rate-corresponding physical condition lowering rate to be larger in response to an increase in the rate. 9. The skin potential detecting means, the skin temperature detecting means, and the pulse rate detecting means are provided on a wrist band worn on the driver's wrist and gloves worn on the palm of the driver. At the same time, the physical condition determining means is installed on the vehicle side, and information is exchanged between the skin potential detecting means, the skin temperature detecting means, the pulse rate detecting means, and the physical condition determining means via radio waves. 9. The vehicle physical condition detection device according to claim 7, wherein the physical condition detection device is set to be performed. 10. The skin potential reference means is provided with an awakening judging means for judging that the driver is in an awake state when the steering frequency is at a predetermined level based on the steering frequency information detected by the steering frequency detecting means. The value setting means sets the latest skin potential value detected by the skin potential detecting means to the skin potential reference value when the awakening determining means determines that the driver is awake. Claims 2, 3, 8, characterized in that
9. The vehicle physical condition detection device according to any one of 9 above. 11. The physical condition deterioration determining means compares the total value of the respective physical condition deterioration rates with a determination reference value, and when the total value reaches the determination reference value, the physical condition of the driver has deteriorated. 3. The method according to claim 2, wherein the determination is set.
The vehicle physical condition detection device according to any one of 3, 5, 6, 8, and 9. 12. The physical condition detecting device for a vehicle according to claim 11, wherein the determination reference value is variably set so as to become smaller as the operating time of the vehicle elapses.