KR20100089408A - Prevention system of driver sleepiness driving - Google Patents

Abstract

PURPOSE: A drowsy driving prevention apparatus is provided to sense the physiological conditions of a driver, including electrocardiogram, in a non-contact manner and thereby prevent drowsy driving regardless of the driving habit of the driver. CONSTITUTION: A drowsy driving prevention apparatus comprises a physiological condition sensor(10), a sound wave oscillating unit(30), and a controller(50). The physiological condition sensor includes an electrode provided on the seatback of a driver seat in a vehicle and senses the physiological conditions of a driver in a non-contact state to the driver's body. The sound wave oscillating unit is arranged in the seatback of the driver seat in the vehicle and generates sound wave oscillation. The controller compares the output signal of the physiological condition sensor with a reference value and determines drowsy driving to control the sound wave oscillating unit.

Description

Driver sleepiness driving prevention device {PREVENTION SYSTEM OF DRIVER SLEEPINESS DRIVING}

The present invention detects the physiological characteristics including the electrocardiogram of the driver in contact with the body of the driver and generates sound wave vibrations, thereby preventing the driver's drowsy driving regardless of the driver's driving habits. As for

Specifically, the physiological characteristics detection unit including an electrode provided in the backrest of the driver's seat of the vehicle, and detects the physiological characteristics including the electrocardiogram of the driver in a non-contact state with the body of the driver; A sound wave vibration unit provided in the backrest of the driver's seat of the vehicle to generate sound wave vibrations; And a control unit for controlling the sound wave vibration unit by determining whether drowsy operation is performed by comparing the output signal of the physiological characteristic detection unit with a preset reference value.

In general, when a driver of a vehicle drives in a tired state or when driving for a long time, the driver unconsciously drowsy driving, thereby causing an accident.

Accordingly, various methods for warning or preventing drowsiness of a driver while driving are proposed, and various researches and developments for this are being conducted.

On the other hand, in recent years, 'public patent No. 10-2004-101941' and the like have been proposed to detect drowsiness by comparing the pulse rate in normal operation and the pulse rate in driving.

However, since the driver's pulse rate must be measured while being in contact with the driver's body, the 'Patent Patent Publication No. 10-2004-101941' is not only difficult to accurately measure the driver's pulse rate according to the driver's driving habit, There is a problem that is difficult to prevent drowsy driving.

The present invention proposes a driver drowsy driving prevention device that can detect the driver's drowsy driving regardless of the driver's driving habit by generating sound wave vibration after detecting the physiological characteristics including the electrocardiogram of the driver in a non-contact state with the body of the driver I would like to.

The present invention was created to solve the above-mentioned problems, and detects the physiological characteristics including the electrocardiogram of the driver in a non-contact state with the driver's body, so as to generate sound wave vibrations, regardless of the driver's driving habits. It is an object of the present invention to provide a driver drowsy driving prevention device that can prevent driving.

The present invention for achieving the above object comprises a electrode provided in the backrest of the driver's seat of the vehicle, and the physiological characteristic detection unit for detecting the physiological characteristics including the electrocardiogram of the driver in a non-contact state with the body of the driver; ; A sound wave vibration unit provided in the backrest of the driver's seat of the vehicle to generate sound wave vibrations; And a control unit for controlling the sound wave vibration unit by determining whether drowsy operation is performed by comparing the output signal of the physiological characteristic detection unit with a preset reference value.

Here, the sound wave vibration unit, the airbag is provided with a diaphragm on the upper surface and the support plate on the lower surface; A sound wave vibration generating member provided on the support plate in the airbag; A fixing sheet surrounding the support plate including the sound wave vibration generating member; It is preferable to include a; vibration transmission wire formed between a plurality of the fixing sheet and the diaphragm.

In addition, the sound wave vibration generating member may be a speaker or a piezoelectric vibrator.

The physiological characteristic detecting unit includes an electrode provided in the backrest of the driver's seat of the vehicle, an amplifying unit for amplifying the displacement current input to the electrode, and an A / D converting signal output from the amplifying unit. It is preferable to include a / D conversion unit.

In addition, it is preferable that a plurality of electrodes of the physiological characteristic sensing unit is provided in the backrest of the driver's seat of the vehicle.

In addition, the driver's seat detecting unit for detecting the driver's driver's driving position is provided in the driver's seat of the vehicle, the control unit is to determine whether the drowsiness driving by correcting the output signal of the physiological characteristic detection unit according to the output value of the driver's tax sensing unit. desirable.

In addition, it is preferable that the driver's tax sensor is made of a pressure sensor.

In addition, the driver's tax detection unit is preferably made of a distance measuring sensor for measuring the distance of the driver and the backrest of the driver's seat of the vehicle.

In addition, a speaker for outputting an alarm sound is provided on the headrest of the driver's seat of the vehicle, and the controller controls the speaker to output an alarm sound when it is determined that the driver has made a drowsy driving.

Further, it is preferable that an alarm lamp is provided in front of the driver's seat of the vehicle, and the controller controls the alarm lamp so that the alarm lamp emits light when it is determined that the driver has made a drowsy driving.

The present invention is controlled by a control unit for receiving a signal output from the physiological characteristic detection unit provided in the backrest of the driver's seat of the vehicle to detect the physiological characteristics including the electrocardiogram of the driver in a non-contact state with the driver's body Since the sound wave vibration unit provided in the backrest portion of the driver's seat of the vehicle may generate sound wave vibrations, the driver's drowsy driving can be more easily prevented.

In addition, since the sound wave vibration unit includes an airbag, a sound wave vibration generating member, a fixed seat, and a vibration transmission wire, the driver's seat of the vehicle can be lightened, and thus, the fuel efficiency of the vehicle can be increased. It works.

In addition, since the sound wave vibration generating member is made of a speaker or a piezoelectric vibrator, there is an effect of generating sound wave vibration more easily.

In addition, the physiological characteristic detection unit is provided in the back support of the seat of the driver seat of the vehicle, an amplifier for amplifying the displacement current input to the electrode, and A / A for converting the signal output from the amplification unit Since the / D conversion unit is included, the physiological characteristics including the electrocardiogram of the driver can be more accurately determined.

Furthermore, since a plurality of electrodes of the physiological characteristic sensing unit are provided in the backrest of the driver's seat of the vehicle, the physiological characteristics including the electrocardiogram of the driver can be more accurately determined.

In addition, the driver's seat detecting unit for detecting the driver's driver's driving position is provided in the driver's seat of the vehicle, and the control unit corrects the output signal of the physiological characteristic detection unit according to the output value of the driver's tax detection unit to determine whether drowsiness driving or not. It is effective to determine whether the driver drowsy driving more accurately.

In addition, since the driver's tax sensing unit is made of a pressure sensor, the driver's drowsy driving can be more easily determined.

In addition, since the driver's tax detection unit is made of a distance measuring sensor that measures the distance between the backrest of the driver's seat of the vehicle and the driver, the driver's drowsy driving can be more easily determined.

In addition, a speaker for outputting an alarm sound is provided on the headrest of the driver's seat of the vehicle, and the controller controls the speaker to output an alarm sound when it is determined that the driver has made a drowsy operation. There is an effect that can wake up efficiently.

In addition, an alarm lamp is provided in front of the driver's seat of the vehicle, and the controller controls the alarms to emit the alarm lamp when it is determined that the driver has made a drowsy driving, thereby enabling the driver to wake more efficiently. It works.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Of course, the scope of the present invention is not limited to the following examples, and various modifications can be made by those skilled in the art without departing from the technical gist of the present invention.

1 is a cross-sectional view schematically showing a driver drowsy driving prevention device according to an embodiment of the present invention, Figure 2 is a block diagram schematically showing a control state of the controller (50 of FIG. 2).

Driver drowsiness driving prevention device according to an embodiment of the present invention, as shown in Figures 1 and 2, largely comprises a physiological characteristic detection unit 10, sound wave oscillation unit 30 and the control unit 50.

First, the physiological characteristic detecting unit 10 is for detecting physiological characteristics including an electrocardiogram of the driver 5 in a non-contact state with the body of the driver (5 of FIG. 3), as shown in FIG. 1. An electrode 110 provided in the backrest 7b of the driver's seat 7 is included.

Here, the physiological characteristic detection unit 10 is an electrode 110 provided in the backrest portion 7b of the driver's seat 7 of the vehicle, and an amplifier for amplifying the displacement current input to the electrode 110 (Not shown) and an A / D converter (not shown) for A / D converting the signal output from the amplifier (not shown).

On the other hand, the displacement current refers to the transmission method of the electrical signal between the skin of the human body and the electrode 110, the electrode having a non-conductive material, such as clothes, bedding, leather, etc., as the potential of the human body changes ( The change in voltage is also generated 110, which means the current generated.

FIG. 3 is a cross-sectional view schematically illustrating a state where the buttocks and thighs of the driver 5 are seated and supported by the buttocks supporting portion 7a of the driver's seat 7 of the vehicle, and FIG. 4 is a back of the driver's seat 7 of the vehicle. It is a perspective view which shows schematically the state in which the sound wave vibration part 30 was provided in the support part 7b.

More specifically, as shown in FIG. 3, when the buttocks and thighs of the driver 5 are seated and supported by the buttocks supporting portion 7a of the driver's seat 7 of the vehicle, the electrocardiogram generated in the body of the driver 5 is illustrated. The physiological characteristic signal is input to the electrode 110 through a displacement current.

In this case, the physiological characteristic signal including the electrocardiogram input through the electrode 110 is amplified and impedance converted and simultaneously input to the amplifying unit (not shown).

At the same time, an impedance is applied to the electrode 110 to convert a physiological characteristic signal including an electrocardiogram generated from the body of the driver 5 into a high gain voltage.

On the other hand, the electrode 110 may be, for example, gold plated after the copper foil on one side of the printed circuit board (PCB) to serve as a sensor for detecting the potential of the skin surface of the driver (5).

In addition, the physiological characteristic signal including the electrocardiogram generated from the body of the driver 5 output from the electrode 110 is input to the amplifying unit (not shown), filtered and amplified, and simultaneously generated from the body of the driver 5. The physiological characteristic signal including an electrocardiogram is converted into an analog signal, input to the A / D converter (not shown), and converted into a digital signal by the A / D converter (not shown), and then the signal is converted into a controller. 50).

As described above, the physiological characteristic sensing unit 10 includes an electrode 110 provided in the backrest 7b of the driver's seat 7 of the vehicle and an amplifying unit for amplifying the displacement current input to the electrode 110. (Not shown) and an A / D converter (not shown) for A / D converting the signal output from the amplifier (not shown), so that the physiological characteristics including the electrocardiogram of the driver 5 can be obtained. There is an advantage that can be judged accurately.

Here, a plurality of electrodes 110 of the physiological characteristic sensing unit 10 may be provided in the backrest portion 7b of the driver's seat 7 of the vehicle.

On the other hand, the electrode 110 of the physiological characteristic detection unit 10 may be provided in one or a plurality of backrest portion 7b of the driver's seat 7 of the vehicle, but preferably the electrocardiogram of the driver 5 In order to more accurately determine the physiological characteristics including, it is more preferable that a plurality is provided in the backrest portion 7b of the driver's seat 7 of the vehicle.

Next, the sound wave vibration unit 30 is for generating sound wave vibrations toward the driver 5, and as shown in FIGS. 3 and 4, the backrest 7b of the driver's seat 7 of the vehicle is shown. Is provided.

5 is a perspective view schematically showing a state of the sound wave vibration unit, FIG. 6 is a cross-sectional view schematically showing a state of the sound wave vibration unit, and FIG. 7 is a cross-sectional view schematically illustrating a state in which a piezoelectric vibrator is provided on a support plate of the sound wave vibration unit.

Here, the sound wave oscillator 30, the airbag 310 is provided with a diaphragm 312 on the upper surface and the support plate 314 on the lower surface as shown in Figure 5 and 6; A sound wave vibration generating member 330 provided on the support plate 314 in the air bag 310; A fixing sheet 350 surrounding the support plate 314 including the sound wave vibration generating member 330; And a plurality of vibration transmission wires 370 formed between the fixing sheet 350 and the diaphragm 312.

More specifically, when the physiological characteristic detection unit 10 outputs a signal that detects a physiological characteristic including an electrocardiogram of the driver to the controller 50, the control unit 50 detects the physiological characteristic detection unit 10. According to a signal, the sound wave vibration generating member 330 is controlled to generate sound waves.

At this time, the vibration transmission wire 370 receives the sound wave generated from the sound wave vibration generating member 330 and transmits the sound wave to the vibration plate 312 so that the vibration plate may vibrate.

As a result, it is possible to prevent the driver from drowsy driving due to the sound wave vibration generated from the sound wave vibration unit 30.

As such, the sound wave vibration unit 30 includes the airbag 310, the sound wave vibration generating member 330, the fixing seat 350, and the vibration transmission wire 370. Of course, it is possible to reduce the weight, of course there is an advantage that can increase the fuel efficiency of the vehicle.

Here, the sound wave vibration generating member 330 may be, for example, a speaker or a piezoelectric vibrator 332 as shown in FIG.

Thus, since the sound wave vibration generating member 30 is made of a speaker or a piezoelectric vibrator 332, there is an advantage that can easily generate sound wave vibrations.

8 is a flow chart of the driver drowsiness driving prevention device of an embodiment of the present invention.

Next, the control unit 50 compares the output signal of the physiological characteristic detection unit 10 with a preset reference value to determine whether the drowsiness operation to control the sound wave vibration unit 30, the power supply unit 51 The power is supplied from the) to control the sound wave oscillator 30.

As shown in FIG. 8, the control unit 50 compares the output signal of the physiological characteristic detection unit 10 with a preset reference value to determine whether drowsy driving is performed. Should be judged.

More specifically, when the vehicle is driven by, for example, the driver 5, the controller 50 may output a signal from which a vehicle speed sensor (not shown) of the driving determination unit 100 detects driving of the vehicle. Will be printed.

The controller 50 presets the output signal of the physiological characteristic sensing unit 10 based on a signal detected by the vehicle speed sensor (not shown) of the driving determining unit 100 as a preset reference value. It is determined whether or not the drowsy driving of the driver (5).

In this case, when the output signal of the physiological characteristic detecting unit 10 is lower than, for example, a preset reference value, the controller 50 determines that the driver 5 is drowsy driving as shown in FIG. 8. At the same time, the sound wave vibration unit 30 is controlled to generate sound wave vibrations, thereby preventing the driver 5 from drowsy driving.

As described above, the physiological characteristic sensing unit provided in the backrest part 7b of the driver's seat 7 of the vehicle so as to detect the physiological characteristics including the electrocardiogram of the driver 5 while being in contact with the body of the driver 5. The sound wave vibration unit 30 provided in the backrest 7b of the driver's seat 7 of the vehicle may generate sound wave vibrations under the control of the control unit 50 that receives the signal output from the vehicle 10. Because of this, there is an advantage that the drowsy driving of the driver 5 can be more easily prevented.

Here, the driver's seat detecting unit 70 for detecting a driver's position of the driver 5 is provided in the driver's seat 7 of the vehicle, and the control unit 50 according to the output value of the driver's seat detecting unit 70. It is good to determine whether the drowsiness operation by correcting the output signal of the physiological characteristic detection unit 10.

As such, the driver's seat detecting unit 70 detects the driver's position of the driver 5 in the driver's seat 7 of the vehicle, and the control unit 50 according to the output value of the driver's seat detecting unit 70. Since the output signal of the physiological characteristic detecting unit 10 is corrected to determine whether drowsy driving is performed, there is an advantage in that the driver 5 can more accurately determine whether drowsy driving.

In addition, the driver's position detecting unit 70 may be made of, for example, a pressure sensor.

In this way, since the driver's tax sensor 70 is made of a pressure sensor, it is possible to more easily determine whether the driver 5 is drowsy.

In addition, the driver's tax detection unit 70 measures a distance between the backrest 7b of the driver's seat 7 of the vehicle and the driver 5, for example, a distance measuring sensor such as an ultrasonic sensor and a laser sensor. It is good to consist of.

Thus, the driver's drowsiness driving of the driver 5 is made of a distance measuring sensor that measures the distance between the driver's seat 7b and the backrest portion 7b of the driver seat 7 of the vehicle. There is an advantage that can be determined more easily.

In addition, a speaker 80 for outputting an alarm sound is provided on the headrest 7c of the driver's seat 7 of the vehicle, and the controller 50 alerts when the driver 5 determines that the driver 5 has drowsy. It is preferable to control the speaker 80 to output sound.

More specifically, when it is determined that the driver 5 has drowsy operation by the output signal of the physiological characteristic detection unit 10, the control unit 50 causes the sound wave vibration unit 30 to generate sound wave vibrations. Simultaneously with the control, the alarm sound is output from the skiker.

As described above, a speaker 80 for outputting an alarm sound is provided on the headrest 7c of the driver's seat 7 of the vehicle, and the controller 50 determines that the driver 5 has drowsy driving. Since the speaker 80 is controlled to output an alarm sound, there is an advantage that the driver 5 can be awakened more efficiently.

In addition, for example, an alarm lamp 90 is provided in a steering wheel or an instrument panel that is in front of the driver's seat 7 of the vehicle, and the controller 50 determines that the driver 5 has drowsy driving. It is preferable to control the alarm lamp 90 so that 90 is emitted.

More specifically, when it is determined that the driver 5 has drowsy operation by the output signal of the physiological characteristic detection unit 10, the control unit 50 causes the sound wave vibration unit 30 to generate sound wave vibrations. At the same time as the control, the alarm lamp 90 is controlled to emit light.

As such, the alarm lamp 90 is provided in front of the driver's seat 7 of the vehicle, and the control unit 50 alerts the alarm lamp 90 to emit light when it is determined that the driver 5 has drowsy driving. There is an advantage that can effectively wake up the drowsiness of the driver (5) because it controls them.

1 is a cross-sectional view schematically showing a driver drowsy driving prevention device of an embodiment of the present invention,

2 is a block diagram schematically illustrating a control state of a controller;

3 is a cross-sectional view schematically illustrating a state in which the buttocks and thighs of the driver are seated and supported by the buttocks supporting portion of the driver's seat of the vehicle;

4 is a perspective view schematically illustrating a state in which a sound wave vibration unit is provided in a backrest of a driver's seat of a vehicle;

5 is a perspective view schematically showing a state of a sound wave vibration unit;

6 is a cross-sectional view schematically showing a state of the sound wave vibration unit;

7 is a cross-sectional view schematically illustrating a state in which a piezoelectric vibrator is provided on a support plate of an acoustic wave vibrator,

8 is a flow chart of the driver drowsiness driving prevention device of an embodiment of the present invention.

*** Explanation of symbols for main parts of drawing ***

5; Driver, 7; Driver seat,

7a; Buttock, 7b; Backrest,

7c; Headrest, 10; Physiological Characteristics,

110; An electrode, 30; Sonic Vibration,

310; Airbag, 312; tympanum,

314; Support plate, 330; Sound wave vibration generating member,

332; Piezoelectric vibrator, 350; Fixed Seat,

370; Vibration transmission wire, 50; Control,

51; A power supply unit 70; Driver's position detector,

80; Speaker, 90; Alarm Light,

100; Judging section

Claims (10)

A physiological characteristic sensing unit including an electrode provided in the backrest of the driver's seat of the vehicle and sensing physiological characteristics including an electrocardiogram of the driver while being in contact with the body of the driver; A sound wave vibration unit provided in the backrest of the driver's seat of the vehicle to generate sound wave vibrations; And a controller configured to control the sound wave vibration unit by determining whether drowsy operation is performed by comparing the output signal of the physiological characteristic detection unit with a preset reference value. The method of claim 1, The sound wave vibration unit, An airbag having a diaphragm on an upper surface and a supporting plate on a lower surface thereof; A sound wave vibration generating member provided on the support plate in the airbag; A fixing sheet surrounding the support plate including the sound wave vibration generating member; Driver transmission drowsiness prevention device comprising a; a plurality of vibration transmission wire formed between the fixing sheet and the diaphragm. The method of claim 2, And the sound wave vibration generating member is a speaker or a piezoelectric vibrator. The method of claim 1, The physiological characteristic detection unit includes an electrode provided in the backrest of the driver's seat of the vehicle, an amplifier for amplifying the displacement current input to the electrode, and an A / D for converting the signal output from the amplifier. Driver drowsiness driving prevention device comprising a conversion unit. The method of claim 4, wherein The plurality of electrodes of the physiological characteristics detecting unit is provided with a plurality of backrest portion of the driver's seat seat of the vehicle driver drowsy driving prevention device. The method according to any one of claims 1 to 5, The driver's seat detecting unit for detecting a driver's driver's tax on the driver's seat of the vehicle is provided. And the controller is configured to determine whether drowsy driving is corrected by correcting an output signal of the physiological characteristic detecting unit according to the output value of the driver's tax detecting unit. The method of claim 6, The driver drowsiness detection unit driver drowsiness driving prevention device, characterized in that consisting of a pressure sensor. The method of claim 6, The driver's drowsiness detection unit driver drowsiness driving prevention device, characterized in that consisting of a distance measuring sensor for measuring the distance of the driver and the backrest of the driver's seat of the vehicle. The method according to any one of claims 1 to 5, A speaker for outputting an alarm sound is provided on the headrest of the driver's seat of the vehicle, And the controller controls the speaker to output an alarm sound when it is determined that the driver has made a drowsy driving. The method according to any one of claims 1 to 5, An alarm light is provided in front of the driver's seat of the vehicle, And the controller is configured to control the alarm lamp so that the alarm lamp emits light when it is determined that the driver has made a drowsy driving.

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