JP3686183B2 - Doze driving prevention device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is used in an apparatus for preventing a driver of a vehicle from falling asleep. In particular, the present invention relates to an alarm device forgetting to attach a monitor device. The driver puts a monitor device on his body, detects the driver's condition, determines whether the driver is dozing, and alerts the driver when the driver falls asleep Used for driving prevention devices.
[0002]
[Prior art]
As a method of preventing drowsy driving, the driver wears a wristband or other monitor device on the body and detects whether the driver is asleep due to the heartbeat or other physical condition of the driver detected by this monitor device. Devices that do this are known.
[0003]
For example, input from the wrist part of the glove and the finger part of the glove or two conductive parts provided in the palm part, and the skin potential level of the finger surface or palm surface is detected based on the wrist potential. There is a device that generates an alarm when the detection output reaches a preset level (Japanese Patent Laid-Open No. 60-139539).
[0004]
In addition, the skin potential difference between the driver's wrist and palm is measured, and the vehicle steering angle and vehicle speed are detected to improve the detection of the dozing state. There is a device that generates an alarm when the steering angle is below a predetermined value and the vehicle speed exceeds a predetermined value at the timing when the vehicle descends at a gradient exceeding a predetermined value (Japanese Patent Laid-Open No. 7-223456).
[0005]
Furthermore, as another device for detecting the driver's drowsiness, for example, the driver's eye movement is monitored with an eye camera or the like, and when the movement of the eyeball becomes dull after exceeding a certain level, the driver is in a drowsy driving state. Instead of detecting the state of the driver or the driver, the driver's driving status is detected, and for example, when the steering wheel operation is not performed for a predetermined time, it is determined that the driver is in a drowsy driving state. There is a device to do.
[0006]
[Problems to be solved by the invention]
In the case of a device that prevents the driver from falling asleep by detecting that the driver has fallen asleep while wearing a monitor device such as a wristband, the driver may forget to wear the monitor device. Or the driver may neglect to wear it. Since this type of device cannot prevent the driver from falling asleep unless the driver wears a monitor device, it is important how the driver wears the monitor device.
[0007]
The present invention has been made in such a background, and provides a snooze driving prevention device that generates an alarm when the driver does not wear the monitor device and can prompt the user to wear the monitor device. With the goal. An object of the present invention is to provide a snooze driving prevention device in which an alarm is continuously generated unless a monitor device is attached when conditions for running the vehicle are in place.
[0008]
[Means for Solving the Problems]
The present invention is characterized by preventing forgetting to wear a monitor device that detects a drowsiness state from a change appearing on a driver's body, or preventing neglect of wearing.
[0009]
That is, the present invention detects a driver's physical condition based on a monitor device that the driver wears on the body and monitors the state of the body, and monitors the output of the monitor device, and determines that the driver is in a dozing state. In the dozing driving prevention device provided with a dozing driving warning device that outputs a monitor, a mounting table for mounting the monitor device is provided in a driver's seat, and a monitor for detecting that the monitoring device is mounted on the mounting table A device mounting detection means, a driving state detection means for detecting that the vehicle is in a driving state, and a monitoring device for the driver when the driving state detection means has a detection output and the monitoring device detection means has a detection output. And alarm means for warning that the user has forgotten to wear it.
[0010]
Provided with a vehicle speed sensor, the driving state detection means is effective when the output of the vehicle speed sensor is equal to or higher than a predetermined speed, and further comprises a seat switch for detecting that the driver is seated in the driver's seat, The driving state detecting means outputs an alarm when the monitor device is mounted in a state where the key switch is turned on, the seat switch is turned on, and the vehicle speed sensor outputs a predetermined speed or more. Means may be included.
[0011]
The monitor device placement detection means detects that the monitor device is placed on the placement table, and the driving state detection means detects that the vehicle is in a driving state. The control circuit captures this detection output and generates an alarm from the alarm means when the vehicle is in a running state and the monitor device remains mounted on the mounting table without being mounted on the driver. Encourage wearing.
[0012]
Whether or not the vehicle is in a traveling state is determined by the output of the vehicle speed sensor, and the control circuit is in the traveling state when the output of the vehicle speed sensor is equal to or higher than a predetermined speed (for example, 5 km / h).
[0013]
In order to ensure the determination of whether or not the vehicle is in the traveling state, a seat switch is provided to detect that the driver is seated in the driver's seat, and the control circuit indicates that the seat switch is seated, and the key When the switch is turned on when the switch is operated and the vehicle speed sensor is outputting a predetermined speed or more, it is detected whether or not the monitor device is mounted on the mounting table and mounted without being mounted. An alarm can be issued from the alarm means as long as it remains.
[0014]
As the monitor device, a wristband worn on the wrist for detecting a heartbeat or skin current can be used.
[0015]
Further, once an alarm prompting wearing is generated, the alarm state cannot be reset until a constant skin current is detected until the monitor device is worn on the body and, for example, a constant heart rate is measured. It is desirable to configure.
[0016]
As a result, when the driver runs the vehicle without wearing the monitor device, the alarm is immediately issued until the vehicle is put on, so it is possible to prevent forgetting to wear and to reliably detect the drowsy driving state. Can be done.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
[0018]
【Example】
Next, embodiments of the present invention will be described with reference to the drawings.
[0019]
(First Example)
FIG. 1 is a block diagram showing a configuration of a main part of the first embodiment of the present invention, FIG. 2 is a perspective view of an instrument panel showing a mounting state of a monitor device in the first embodiment of the present invention, and FIG. It is a perspective view which shows the arrangement position of the hook N * switch used as a monitor apparatus mounting detection means in one Example.
[0020]
The first embodiment of the present invention is a wristband 1 used as a monitor device that is worn by a driver on the wrist and monitors the physical state by heartbeat or skin potential, etc., and the physical state of the driver is detected by the monitoring output of the wristband 1 A snooze driving alarm device 2 is provided that determines that the user is in a snoozing state and generates an alarm signal. The drowsy driving alarm device 2 includes a control circuit 3 and alarm means 4 for generating an alarm according to an alarm signal from the control circuit 3. The alarm means 4 includes an alarm for generating an alarm by sound. A buzzer 5 and an alarm lamp 6 that generates an alarm when turned on are arranged.
[0021]
Further, as a feature of the present invention, a mounting table 7 for mounting the wristband 1 is provided on the instrument panel 11 of the driver's seat, and a monitor device mounted to detect that the wristband 1 is mounted on the mounting table 7. Position detecting means is provided. A hook switch 8 is used for the monitor device placement detection means, and an ON signal is output when the wristband 1 is placed.
[0022]
Further, the control circuit 3 includes a driving state detection means 9 for detecting that the vehicle is in a driving state, and a wristband 1 when the driving state detection means 9 has a detection output and the hook switch 8 has a detection output. Alarm generating means 10 for sending an alarm signal indicating forgetting to attach to the alarm means 4.
[0023]
The driving state detecting means 9 of the control circuit 3 is connected to the vehicle speed sensor 12 for detecting the vehicle speed, the seat switch 13 for detecting that the driver is seated in the driver's seat, and the output from the key switch 14. 14 includes a means for outputting an alarm signal when the wristband 1 is mounted on the mounting table 7 in a state where 14 indicates ON and the vehicle speed sensor 12 indicates a predetermined speed (for example, 5 km / h) or more. It is. The predetermined speed can be set to an arbitrary value depending on the vehicle type or in light of the operation status.
[0024]
As shown in FIG. 3, the mounting table 7 is formed in an L shape so as to prevent the wristband 1 from being detached, and a hook switch 8 is installed on the mounting surface of the wristband 1. The hook switch 8 is turned on by its weight when the wristband 1 is placed, and automatically turned off by a spring force when the wristband 1 is removed.
[0025]
The alarm generation means 10 is configured such that once an alarm is generated, the alarm cannot be reset until the wristband 1 is worn on the body and a heartbeat signal or skin current comes from the body.
[0026]
Next, the alarm generation operation of the first embodiment of the present invention configured as described above will be described. FIG. 4 is a flowchart showing the flow of alarm generation operation by the control circuit in the first embodiment of the present invention.
[0027]
The control circuit 3 takes in the outputs of the key switch 14 and the seat switch 13, and the operation state detecting means 9 determines whether or not the outputs indicate "ON". If “ON” is indicated, the output of the vehicle speed sensor 12 is taken in as a result that the key switch 14 is turned to the driving position and the driver is seated on the seat, and the driving posture is prepared. It is determined whether or not it exceeds. If it exceeds the predetermined value, it is assumed that the vehicle is in a driving state, and the output of the hook switch 8 is captured. If this output indicates “ON”, the driver is operating without wearing the wristband 1, so the alarm generation means 10 sends an alarm signal to the alarm means 4. The alarm means 4 sounds an alarm buzzer 5 and lights an alarm lamp to urge the driver to wear the wristband 1.
[0028]
When the driver wears the wristband 1 by this alarm, the hook switch 8 is turned off, and when the signal indicating the physical condition starts to arrive from the wristband 1, the control circuit 3 receives the alarm from the alarm generating means 10. The alarm signal transmission is stopped, and the alarm generation by the alarm buzzer 5 and the alarm lamp 6 is stopped.
[0029]
In this embodiment, the driving state is detected by the outputs of the key switch 14, the seat switch 13, and the vehicle speed sensor 12. However, it is practical to determine whether the vehicle is in the driving state only by the output of the vehicle speed sensor 12. There is no problem with the difference.
[0030]
Further, when the device is simplified, the alarm can be stopped when the driver turns off the hook switch 8 of the wristband 1.
[0031]
When the wristband 1 is worn on the wrist, the heart rate or skin potential is detected. The control circuit 3 takes in this heart rate or skin potential, and determines that it has become doze when the heart rate falls below a predetermined value or when the skin potential changes.
[0032]
In a device using a heart rate sensor, the heart rate sensor is attached to the wristband 1, an output signal from the heart rate sensor is input to a heart rate detection circuit, and the heart rate is calculated from the input time difference between the previous and current heart rate. This is a method of comparing the heart rate with a preset heart rate in the awake state, and determining that the heart rate is asleep when the heart rate rapidly decreases with respect to the heart rate at the time of awakening. A known technique can be used for this method. Since this technique is not directly related to the gist of the present invention, a detailed description thereof is omitted here, but is described in, for example, Japanese Patent Laid-Open No. 4-9140.
[0033]
As another method for determining the dozing state, there is a technique that utilizes changes in skin potential. In this method, the wrist potential is taken in from the wristband 1 and a thumb is attached to the thumb to take in the potential from the thumb. In the case of this method, the negative slope dv / dt (potential difference / time difference) of the change is calculated, and it is determined that the patient is dozing when the negative slope of the potential difference is falling at a slope exceeding a predetermined value. . This method is also a known technique, and detailed description thereof is omitted here.
[0034]
Furthermore, in order to make the determination of being in a doze state by the above technology, the outputs from the vehicle speed sensor and the steering angle sensor are taken, on condition that the vehicle speed exceeds the set value and the steering angle is not more than the set value. The determination that the driver is dozing can be used together. This technique is also known.
[0035]
(Second embodiment)
FIG. 5 is a circuit diagram showing the configuration of the main part of the second embodiment of the present invention. The second embodiment is constituted by an electric circuit, and the wristband 1 is the same as that of the first embodiment shown in FIGS. 2 and 3, and is provided on the instrument panel 11 and provided with a hook switch 8. Is mounted on the mounting table 7. In this state, the hook switch 8 is turned on.
[0036]
In the case of the second embodiment, when the driver is seated in the driver's seat, the seat switch 13 is turned on, and when the key switch 14 is turned on while the wristband 1 is not attached and left on the mounting table 7. The current from the battery 15 is supplied to the exciting coil 16a of the relay 16 via the key switch 14 and the sheet switch 13 to turn on the contact. As a result, the current from the battery 15 is supplied to the alarm lamp 6 and the alarm buzzer 5 of the alarm means 4 via the relay 16 and the hook switch 8, and generates an alarm by illuminating and sounding to prompt wearing of the wristband 1.
[0037]
When the driver removes and attaches the wristband 1 from the mounting table 7 by this alarm, the hook switch 8 is turned off, the current supply to the alarm means 4 is cut off, and the alarm generation stops.
[0038]
In the second embodiment, since the presence / absence of the wristband 1 is detected immediately before the vehicle is driven, an effect can be obtained in which a warning is issued in advance and the wristband 1 is securely attached. is there.
[0039]
【The invention's effect】
As described above, according to the present invention, when the driver runs the vehicle without wearing the monitor device (wristband or the like) or when trying to run the vehicle, an alarm can be generated to prompt the user to wear the vehicle. . As a result, it is possible to prevent the monitor device from being forgotten or neglected to be attached, and to reliably generate a doze alarm when the device is in a doze mode.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of a main part of a first embodiment of the present invention.
FIG. 2 is a perspective view of an instrument panel showing a mounting state of a monitor device according to the first embodiment of the present invention.
FIG. 3 is a perspective view showing an arrangement position of a hook switch used as a monitor device placement detection means in the first embodiment of the present invention.
FIG. 4 is a flowchart showing a flow of alarm generation operation by the control circuit in the first embodiment of the present invention.
FIG. 5 is a circuit diagram showing a configuration of a main part of a second embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Wristband 2 Dozing alarm device 3 Control circuit 4 Alarm means 5 Alarm buzzer 6 Alarm lamp 7 Mounting stand 8 Hook switch 9 Operation state detection means 10 Alarm generation means 11 Instrument panel 12 Vehicle speed sensor 13 Seat switch 14 Key switch 15 Battery 16 Relay 16a Excitation coil

Claims (4)

A wristband that the driver wears on the body and detects the state of the body, and by monitoring the wristband output, the driver's body state is detected, and the driver is determined to be asleep and outputs an alarm. In a snooze driving prevention device equipped with a driving alarm device,
A mounting table for mounting the wristband on the instrument panel of the driver's seat is provided.
A wristband placement detection means for detecting that the wristband is placed on the placement table, a driving state detection means for detecting that the vehicle is in a driving state, and a detection output to the driving state detection means. A drowsiness prevention device comprising: alarm means for warning the driver that he / she has forgotten to wear the wristband when the wristband placement detection means has a detection output.   The drowsiness prevention device according to claim 1, further comprising a vehicle speed sensor, wherein the driving state detecting means is effective when an output of the vehicle speed sensor is equal to or higher than a predetermined speed.   The seat switch for detecting that the driver is seated in the driver's seat is provided, and the driving state detecting means includes means for detecting that the key switch is turned on and the seat switch is in the seated state. The drowsiness prevention device described. The drowsiness prevention device according to claim 1 , wherein the alarm means is set so that the alarm cannot be reset until the driver is put on the wristband .

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