JPS5920096A - Non-normal state alarm for operator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device that alerts the driver when he or she is unable to drive a vehicle normally, such as when the driver has drunk alcohol or has insufficient sleep.

If the driver is unable to drive the vehicle normally, such as when the driver is under the influence of alcohol or sleep deprivation, it is necessary for the driver to stop driving the vehicle. It is difficult for a person to judge whether or not he/she can safely drive a vehicle/vehicle by himself/herself, so it is preferable to make that judgment objectively. Therefore, in the past, the driver's reaction time, accuracy of movements, etc. were tested in advance, and it was determined from the results whether the driver could drive the vehicle safely.

However, such tests are time consuming, which is inconvenient when the vehicle must be driven immediately, and is also troublesome for drivers, which is why such tests are not always carried out in the past. was there.

The present invention has been made in view of the above-mentioned conventional problems.1
．． The purpose is to provide a device that can detect when the driver is unable to drive the vehicle safely and issue a warning to that effect.

In order to achieve the above object, the present invention provides a resistance detector provided on a steering wheel and gripped by a driver, which includes a pole and detects the skin resistance of the driver's palm between the electrodes; The alarm device includes a comparison judgment circuit that compares a skin resistance value with its reference value and outputs an alarm signal when the deviation exceeds an allowable value, and an alarm device that issues an alarm based on the alarm signal. The present invention is characterized in that a warning is issued to notify the driver that the vehicle cannot be driven responsibly.

Hereinafter, preferred embodiments of the apparatus according to the present invention will be described based on the drawings.

Figure 8g1 shows the overall configuration of a preferred embodiment of the device according to the present invention, and in the same figure, the device of this embodiment has a detection value of 10.
A resistance detector 10 outputs 0, a comparison judgment circuit 12 inputs a detected value 100 and outputs an alarm signal 102. i-phase signal 1
02 is input.

The resistance detector 10 has resistors 16.18° 20 on three sides, the side opposite to the side of the resistor 16 is open, and electrodes 22a, 22b are provided on both open ends. The electrode 22 is connected to a resistor bridge circuit to which a direct voltage is supplied from the
a, 22b are the steering wheel 2 as shown in FIG.
When 8 indicates that the vehicle is moving straight, the driver's palm 30
are provided at positions A and B where the steering wheel is normally gripped, and in this embodiment, as shown in FIG. 3, electrodes 22a and 22b are embedded in the surface of the steering wheel 28 at a constant interval.

Since the resistance detector 10 is configured as described above, the electrode 22a provided on the steering wheel 28.

22b is gripped by the driver, the galvanometer 26 outputs a detected value 1o corresponding to the skin resistance of the driver's palm.

is output from the resistance detector 10.

In FIG. 1, the detected value 100 is inputted to the AI converter 32 in the comparison/judgment circuit 12 via the Ronosos filter 34 and converted into a digital signal, and then the arithmetic circuit 3
6. This arithmetic circuit 36 calculates an average value 104 of skin resistance values of the palm 3o within a certain period of time from the digitized detection value 100, and sets this to the lunch 38. The arithmetic circuit 36 also stores the initial value of the average skin resistance 104 as a reference value 106 in the memory 40 . Then, each average skin resistance 104 set in the latch 38 is read out in the IF5 order and stored in the memory 40 in the comparator circuit 42.
The reference value 106 outputted from the reference value 106 is sequentially compared. The deviation 108 obtained by this comparison circuit 42 is supplied to a judgment circuit 44 to which a tolerance value 110 is given in advance.
outputs the alarm signal 102 to the alarm device 14 when the deviation 108 exceeds the allowable value 110.

The alarm device 14 is comprised of an alarm buzzer 46 or an alarm lamp 48, which are activated by an alarm signal 102 from the determination circuit 44.

Note that the detection time does not need to be limited to one minute, and an appropriate sampling time may be set in advance; however, in this embodiment, the case where the sampling time is one minute will be described.

In this embodiment, the comparison/judgment circuit 12 is mainly composed of a microcomputer.

A preferred embodiment of the present invention has the above configuration, and its operation will be explained below.

FIG. 4 shows a flowchart at the time of starting the present embodiment, and when it is confirmed in step 200 that the engine has started, it is determined in step 4202 whether the memory 40 has been cleared. If it is determined in step 202 that the memory 40 has not been cleared, the memory 40 is cleared in step 204. When it is confirmed that the memory 40 has been cleared in this way, the entire apparatus of this Song Dynasty embodiment starts operating in step 206, and signal processing is performed according to the operation flowchart of FIG. 5.

After the engine is started, the driver grips the steering wheel 28 as shown in FIG. AD conversion is performed, and the arithmetic circuit 36 reads the detected value 100 digitized by the step 212 for one minute, calculates the average value 104 in step 214, and stores the average value 104 in the memo IJ 40 as an initial value in step 216. Stored.

Then, in steps 218, 220, and 222, the same processing as in steps 208, 210, and 212 is performed to read the skin resistance of 100 for the next minute, and it is checked in step 224 whether this is the initial value. Outstanding average value 1
04 is calculated by the arithmetic circuit 36 in step 226.

Here, the detected value 100 changes as shown in FIG. 6, for example, and the value increases when the driver becomes excited, such as by drinking, and when the driver becomes drowsy due to lack of sleep. decreases.

When the detected value 100 changes as shown in Figure 6 above, the value 10
4 changes stepwise every minute as shown in FIG.

In FIG. 7, the initial value of value 104 is stored in memory 40 as reference value 106 and is constantly supplied to one comparison input of comparison circuit 42, and comparator 42 compares value 104 and value 106 every minute. The circuit 44 determines the deviation 108 by comparing it to
I (step 228).

In this judgment circuit 44, for example, as shown in FIG. When it is determined that the value is within the range, the previous steps from step 208 onwards are repeated; when it is determined that the range is not within the range, it is determined in step 232 whether or not the value i04 is greater than the initial value 106; when it is determined that the value is too close, an alarm signal is issued. In step 234, the buzzer 46 or lamp 48 notifies the driver that the driver is excited, and when it is determined in step 232 that the driver is excited, the signal 102 causes the buzzer 46 or lamp 48 to notify the driver in step 236 that the driver is excited. Alerts you when you are asleep.

For example, in Figure 8A;7, it is reported that the driver is excited between 1 and 3 minutes after the engine starts, and that the driver is dozing after 4 minutes. .

Note that when steps 234 and 236 are completed, the process returns to step 218 and the same operation is repeated.

Further, in FIG. 8, when the engine is not stopped when the apparatus of this embodiment is stopped, the process returns to step 238 when it is determined that the engine is not stopped, and it is determined that the engine is stopped. Step 24
2, the memory 4o is cleared and the operation of this device is completely terminated.

As explained above, according to the present invention, the skin resistance of the driver's palm is measured, and based on the measurement result, it is determined whether or not the driver can safely drive the vehicle. If it is determined that the vehicle cannot be driven safely, the driver is notified to that effect, thereby eliminating the time required in the past for the driver to test and determine whether or not the vehicle can be driven safely. Furthermore, it is possible to objectively and easily inform the driver that he or she cannot drive safely. In addition, this device constantly monitors whether the driver is able to drive safely, so it can issue a warning when the driver becomes tired and falls asleep during long-distance driving. It is possible to prevent accidents caused by so-called drowsy driving.

Furthermore, according to the embodiment, the contents of the memo', 140 are as follows:
Since the buttons are rewritten each time the vehicle is driven, the device can function effectively even when different drivers drive the vehicle or even when the same driver has different physical conditions.

[Brief explanation of the drawing]

Fig. 1 is an overall configuration diagram of a preferred embodiment of the device according to the present invention, Fig. 2 is an explanatory diagram of the mounting position of the electrode, Fig. 3 is a partial sectional view of the handle in the position where the electrode is mounted, and Fig. 4 is a diagram illustrating the mounting position of the electrode. figure,
5 and 8 are flowcharts explaining the operation of the embodiment shown in FIG. 1, FIG. 6 is a characteristic diagram of detected resistance values, and FIG. 7 is a characteristic diagram of average skin resistance values. 1Q...Resistance detector, 12...Comparison/judgment circuit, 14
...Alarm, 22a, 22b...Electrode, 28...
Steering, 30... - Palm, 40... Memory, 4
2... Comparison circuit, 44... Judgment circuit. Agent Patent Attorney Atsushi Nakajima Figure 2 Figure 4 Figure 5

Claims (1)

[Claims] (1) Compare the detected skin resistance value with a reference value using a resistance detector 1B, which includes electrodes installed on the steering wheel and is held by the driver, and detects the skin resistance of the driver's palm between the electrodes. An abnormal state notification device for a driver, characterized in that it has a comparison judgment circuit that outputs a warning signal when the deviation exceeds an allowable value, and a warning device that issues a bright warning in response to the warning signal. . (2. In the device according to claim 1, the comparison and determination circuit includes a memory circuit that stores the initial detection value of the resistance detector as the reference value for 11 days.) State threat device.