KR20000026046A - System for preventing sleepy driving and method thereof - Google Patents

Abstract

The present invention provides a means for detecting a contact state of a driver's hand and a handle and a head movement of a driver, a controller for determining whether the driver is sleepy and outputting a control signal to various peripheral devices when the user is asleep, and greatly outputting music. A drowsiness prevention system that consists of means of drowsiness to wake up the driver, and the driver's head nods several times and his hands deviate from certain parts of the steering wheel. The present invention relates to a method for combating drowsiness that wakes up a drowsiness of a driver by intensive injection, and detects a driver's drowsiness to wake up drowsiness in various ways, thereby preventing drowsy driving.

Description

Drowsy driving prevention system and method

The present invention relates to a system for preventing drowsy driving and a method thereof, in particular, a sensor for detecting whether a driver is drowsy using a sensor and suddenly playing loud music or intensively discharging air conditioner wind to the driver when a drowsy driving is performed. The present invention relates to a drowsy driving prevention system and method for preventing drowsiness by preventing drowsiness.

In general, accidents caused by drowsy driving often lead to large accidents. In particular, when the driver alone driving at night on the highway, it is easy to flicker due to the monotonous surrounding environment, which is likely to cause an accident. In addition, such drowsy driving accidents lead to large-scale crash accidents, causing a lot of casualties, but a system that effectively wakes up sleepy drivers has not yet been implemented.

Some drivers play music to prevent dangerous drowsy driving, but music that is maintained at a similar size may not be further stimulated by the driver after a certain time.

The present invention has been made to solve the problems described above, the object of the present invention is to detect the driver's head movement and the change of contact between the steering wheel and the hand holding the steering wheel to determine whether drowsy driving and suddenly when the driver is dozing The present invention provides a drowsy driving prevention system and a method for preventing drowsy driving by waking up by changing the driving environment instantaneously using loud music, air conditioner operation, window opening, and the like.

1 is a block diagram showing a first embodiment of a drowsy driving prevention system according to the present invention.

2 is a front view showing a steering wheel according to the present invention.

3 is a block diagram showing a second embodiment according to the present invention.

4A and 4B are flowcharts illustrating a method of preventing drowsy driving in accordance with the present invention.

Explanation of symbols on the main parts of the drawings

10 ... battery 12 ... start switch

14 ... Vehicle speed sensor 20 ... Contact sensing means

30 ... position sensor 40 ... first motor drive means

42 ... 1st motor 50 ... controller

60 ... Memory 62 ... Digital / Analog Converter

64 ... Amplifier 66 ... Speaker

70 ... second motor drive means 72 ... second motor

74. Wind direction controller 76 ... Air conditioner drive means

78 ... air conditioner

Drowsiness prevention system according to the present invention for achieving the above object, the vehicle speed detection means for detecting the driving speed of the vehicle, the contact detection means for detecting the contact of the driver's hand and the handle, and the head of the driver to move up and down A controller for outputting a control signal to a peripheral device to wake up the drowsiness according to a signal output from the vehicle speed detecting means, the contact detecting means and the head position detecting means, and a control signal of the controller. According to the drowsiness eradication means to wake up the drowsiness of the driver.

Drowsiness driving prevention method according to the present invention for achieving the above object, by detecting the speed of the vehicle detects the head of the driver moving up and down when the vehicle speed is above a certain value, whether the driver's hand is in contact with a specific part of the steering wheel Detects and outputs respective signals corresponding to the detected signal; and if the controller determines that the driver is dozing, according to the respective signals output from the detecting step, the controller transmits the drowsiness control signal to various peripheral devices. And outputting the control signal and outputting the control signal, thereby reducing the sleepiness of the driver.

Hereinafter, exemplary embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

1 is a block diagram showing a first embodiment of the drowsiness driving prevention system according to the present invention, Figure 2 is a front view of the steering wheel according to the first embodiment shown in Figure 1, Figure 3 is a second view according to the present invention A block diagram illustrating an embodiment, and FIGS. 4A and B are flowcharts showing the steps of the drowsiness fighting method according to the present invention.

Referring to Figure 1, the vehicle speed sensor 14 is configured to detect the vehicle speed and output a corresponding signal, it is preferable to use the existing vehicle speed sensor mounted on the transaxle of the vehicle.

The touch sensing means 20 is installed inside the finger-shaped groove formed in the steering wheel and is composed of n touch sensors 20a,..., 20n for detecting a touch of the driver's hand and the steering wheel and outputting a corresponding signal. Position detection sensor 30 is installed on the top of the window frame of the front window is configured to detect the head height and nod of the driver and output a signal corresponding thereto.

The controller 50 analyzes the signal output from the vehicle speed sensor 14 and detects the position detecting sensor 30 according to the signal of the signal contact detecting means 20 and the position detecting sensor 30 when the vehicle speed is higher than a predetermined value. The angle is configured to determine whether it is correct, the driver is dozing and output corresponding control signals to various peripherals.

The first motor driving means 40 is configured to drive the first motor 42 according to the control signal of the controller 50 to change the detection angle of the position sensor 30.

The drowsiness eliminating means of the first embodiment is composed of an audio output means for outputting music or warning broadcasts and an air conditioner operating means for discharging the cooled wind by operating the air conditioner.

The voice output unit may include a memory 60 for outputting music or a warning broadcast in accordance with a control signal of the controller 50 and a voice signal output from the memory 60 and passed through the digital / analog converter 62. And an amplifier 64 for amplifying and supplying the amplified audio signal to the speaker 60, and a speaker 66 for outputting the amplified audio signal to the vehicle interior.

In addition, the air conditioner operating means is a wind direction in accordance with the signal of the second motor drive means 70 and the second motor drive means 70 for driving the second motor 72 in accordance with the control signal output from the controller 50. A second motor 72 for directing the adjusting unit 74 toward the driver's seat, an air conditioner driving unit 76 for operating the air conditioner 78 according to the control signal of the controller 50, and a wind direction adjusting unit 74 facing the driver's seat; It is composed of an air conditioner (78) for discharging the air cooled through).

The overall operation of the drowsy driving prevention system having the above configuration is as follows.

When the vehicle is started, the start switch 12 is turned on and the battery 10 is supplied to the entire circuit. The vehicle speed sensor 14 detects the speed of the vehicle and outputs a signal. The controller 50 receives the signal. Is compared with the preset vehicle speed reference value. As a result of comparison, if the current speed is below the vehicle speed standard, it is considered that the vehicle is running at low speed in the parking lot, etc., but the vehicle is detected again. do.

The position sensor 30 detects whether the driver's head is present at the current height and outputs a signal corresponding to the controller 50. When a signal of the position sensor 30 is detected that the head is not detected at the current height, the controller 50 outputs a motor driving control signal to the first motor driving means 40 to drive the first motor 42. The detection angle of the position sensor 30 is adjusted. When the angle of the position sensor 30 is adjusted, the position sensor 30 again detects whether a head is detected at the current angle and outputs a signal, and the controller 50 having received the signal detects the head. No longer outputs the motor drive control signal to fix the detection angle of the sensor 30 to the current angle, and if not detected, the angle adjustment and head detection operations are repeated as described above until the head is detected.

When the detection angle of the position detection sensor 30 according to the height of the driver's head is determined, the position detection sensor 30 continuously detects the driver's head at a fixed angle and outputs a corresponding signal to the controller 50. The touch sensing means 20 composed of n touch sensors 20a,..., 20n installed in the formed finger-shaped groove detects the contact between the driver's hand and the groove and outputs a corresponding signal to the controller 50. do.

The controller 50 analyzes the output signal of the contact detecting means 20 and the output signal of the position detecting sensor 30 so that the driver's head position is not periodically detected for a predetermined number of times, and the driver's hand comes out of the groove to make contact. When the pressure decreases, it is determined that the driver nods and snoozes, and sequentially outputs the next control signal.

First, when the driver first detects tightening in one step, the controller 50 applies a music output signal to the memory 60, and the memory 60 receiving the music output signal outputs a built-in music signal to digitally. The speaker 66 is supplied to the speaker 66 via the analog converter 62 and the amplifier 64. The music output to the speaker 66 is loudly echoed inside the vehicle to wake up the dozing driver.

In this step, when it is detected that the driver is dozing a second time, the controller 50 applies a music output signal to the memory 60 and at the same time a control signal to the second motor drive means 70 and the air conditioner drive means 76, respectively. Outputs According to a control signal output from the controller 50, the second motor driving means 70 drives the second motor 72 to direct the wind direction adjusting portion 74 of the air conditioning vent located at the front of the vehicle toward the driver's seat, and the air conditioning driving means. 76 operates the air conditioner 78 to intensively discharge the cooled air toward the driver's seat. Meanwhile, the memory 60 operates as described in one step to output music. Suddenly, music is output loudly and the air conditioning wind is exhausted toward the driver's seat to wake up the dozing driver.

Finally, when the third detection of drowsy driving is performed, the controller 50 applies control signals to the second motor driving means 70 and the air conditioner driving means 76, respectively, and simultaneously outputs a warning broadcast signal to the memory 60. Apply. The memory 60 receiving the warning broadcast output signal broadcasts a built-in warning voice through the speaker 66. Because of the risk of an accident, the driver alerts the driver to stop driving and sleep for a while, and wakes up the driver's drowsiness and encourages the driver to rest with the cooled air conditioner wind exhausting toward the driver's seat.

Figure 2 shows an embodiment of the steering wheel with a finger-shaped groove according to the present invention, a plurality of four-fingered grooves (20a, ..., 20d) except for the thumb is formed in various parts of the steering wheel 20 and the groove There are a number of contact sensors built into it that are configured to detect if the driver's hand is in contact with the steering wheel.

3 is a block diagram showing a second embodiment according to the present invention, which is a drowsy driving prevention system having a window opening means for opening a window 74 'according to a control signal of the controller 50 instead of operating the air conditioner. In the above description of the operation of the first embodiment, the second motor driving means 70 'drives the second motor 72' according to the control signal output from the controller 50, instead of the air conditioner being operated, so that the window 74 'is operated. Open the door and let the wind suddenly enter the room.

Figure 4 is a flow chart showing the steps of the drowsiness driving prevention method according to the present invention, when the controller compares the vehicle speed detection signal of the vehicle speed sensor with the vehicle speed reference value is more than the vehicle speed reference value to go to the next step and the position sensor Detecting the change of the driver's head position, the touch sensor detects whether the driver's hand is in contact with a specific part of the steering wheel and outputs a signal corresponding to each of the sensors, and the controller outputs each sensor. Analyzing the signal to determine whether the driver is drowsiness, and when determined to be drowsy driving control signal output step of outputting various drowsiness eradication signals to various peripherals according to the number of drowsiness detection, and according to the signal of the control signal output step It consists of a drowsiness eradication phase that wakes up the driver's drowsiness by operating peripheral devices.

First, in the vehicle speed determination step, when the system starts, the vehicle speed sensor detects and outputs the vehicle speed (S ₁ ), and the controller compares the current vehicle speed with a preset vehicle speed reference value sp according to the output signal (S _2). ) If the vehicle speed reference value sp or more, go to the next step (S ₃ ), if the vehicle speed reference value sp or less (S ₁ ) and compares the vehicle speed reference value (S ₂ ).

In the sensing step, the position sensor senses the head position of the driver at the current angle and outputs it (S ₃ ), and the controller determines whether the head is detected according to the signal output from the position sensor (S ₄ ). The angle of the sensor is fixed at the current angle (S ₆ ), and if not detected, the angle of the position sensor is slightly corrected (S ₅ ) and the head position is sensed again (S ₃ ). The above operation is repeated until the head is detected. After the angle of the position sensor is fixed, the driver initializes the variable nod, which means the number of times that the driver is caught, to 1, and sets the judgment threshold m for determining whether the user is sleepy to an appropriate value (S ₇ ). The variable h_change, which represents the number of times a change is detected, is initialized to 0 (S ₈ ). After the initialization of parameters and setting of the reference value, the position sensor detects the position of the driver's head at a fixed angle, and the contact sensor detects contact between the hand and the handle (S ₉ ).

Next, the control signal output step, the controller determines whether the head position is changed or the hand and the handle does not touch according to the output signal of the position sensor and the contact sensor (S ₁₀ ), if not both again the handle and hand The change of the contact and the head position is sensed (S ₉ ), and if one or more occurs, it is determined whether the head position change occurs (S ₁₁ ). As a result of the determination, when the head position is not changed, that is, when the hand is out of a specific part of the handle, the number of occurrences of the head position change is immediately compared with whether the accumulated variable h_change is greater than or equal to the drowsiness determination criterion m (S ₁₃ ). If is changed, the number of head position changes h_change is increased by 1 (S ₁₂ ), and then compared to whether h_change is drowsiness criterion m or more (S ₁₃ ). As a result of the comparison, when the number of change of the head position h_change is less than the drowsiness criterion m, it is regarded as simply moving the head rather than dozing, and again the handle and hand contact and the change of the head position are sensed (m ₉ ). If abnormal, that is, the driver nodded more than m times, check that the contact between the hand and the handle is not detected (S ₁₄ ). If a contact is detected, the driver is considered not to be asleep and again senses the handle and hand contact and the change in the position of the head (S ₉ ). If no contact is detected, the driver nods his head and is considered to be dozing. The control signal is outputted to determine whether the second detection is performed (S ₁₅ , S ₁₆ ) to perform the drowsiness eradication operation corresponding to each drowsiness detection number nod.

Lastly, the sleepiness eradication step is performed when the number of drowsiness caught nod is 1 (S ₁₅ ), that is, when the first time the person is caught dozing, the music is greatly output (S ₂₁ ) and then the number of drowsiness caught nod is increased by 1 (S _18). ), When the number of drowsiness caught nod is 2 (S ₁₆ ), that is, when the second caught, the air conditioner is operated (S ₁₇ ) and then the number of drowsiness caught nod is increased by 1 (S ₁₈ ). After increasing the number of drowsiness detections nod, turn off the air conditioner (S ₁₉ ) and check if the ignition is turned off (S ₂₀ ), if it is off, end the operation and if not, reset the head position change number h_change to 0 (S ₈ ). Sensing the contact of the handle and hand, the change in the position of the head (S ₉ ). When the number of drowsiness caught nod is not 1 or 2, that is, the third caught, after turning on the air conditioner and outputting a warning broadcast to warn of the risk of an accident and to stop and rest (S ₂₂ ), the number of drowsiness caught Initialize nod to 1 (S ₂₃ ). After initializing the drowsiness detection number nod, turn off the air conditioner (S ₁₉ ), check if the start is turned off (S ₂₀ ), if it is off, finish the operation and if not, reset the head position change number h_change to 0 (S ₈ ) The touch of the hand and the change in the position of the head is sensed (S ₉ ).

As described above, the drowsiness driving prevention system and the drowsiness driving prevention method according to the present invention provide a stimulus by stimulating the driver in a manner such as outputting music loudly or intensively discharging the cooled air conditioner wind when the driver is sleeping. Wake is effective in preventing drowsy driving.

In addition, according to the present invention, it is more reliable than simply judging by only one information because it determines whether the drowsiness by detecting both the position of the driver's head position and whether the driver's hand and the handle contact.

According to the present invention, the driver can effectively wake up the dozing driver because it gives various stimuli in different ways according to the number of times that the driver has been caught, and operates in multiple stages according to the number of times detected until the driver wakes up even if they do not wake up at once. Continue to wake up in various ways.

Claims (5)

Vehicle speed detecting means for detecting a driving speed of a vehicle; Touch sensing means for sensing whether the driver's hand touches the handle; Head position detecting means for detecting the head of the driver moving up and down; A controller for outputting a control signal to a peripheral device to wake up the drowsiness according to the signals output from the vehicle speed detecting means, the contact detecting means and the head position detecting means; And Drowsiness driving prevention system characterized in that the drowsiness eradication means for waking the drowsiness of the driver in accordance with the control signal of the controller. The sleepiness driving prevention system according to claim 1, wherein the sleepiness eradication means is an air conditioner for intensively injecting cooled air to a driver's seat according to a control signal of the controller. The sleepiness driving prevention system according to claim 1 or 2, wherein the sleepiness eradication means is a sound output means for outputting music or a warning broadcast according to a control signal of the controller. 3. The drowsiness driving prevention system according to claim 1 or 2, wherein the drowsiness eliminating means is a window opening means for automatically opening a window according to a control signal output from the controller. A vehicle speed determination step of detecting a speed of the vehicle and determining whether the vehicle speed is above a predetermined value; A position sensor positioning step of adjusting the position of the position sensor to sense a head which is a part of the driver's body, A sensing step of detecting whether the driver's hand is in contact with a handle; A determination step of determining whether the driver's head has changed position several times in a state where the driver's hand is not in contact with the steering wheel in the detection step; As a result of judging in the determination step, when the driver's hand does not touch the handle and the head moves up and down several times, it outputs a predetermined melody for a certain time and at the same time operates the air conditioner for a certain period of time to combat drowsiness. How to prevent drowsy driving.