A vehicle-mounted anti-drunk driving method based on multi-sensor fusion detection

Abstract

Currently, the drunk driving detection is mostly carried out manually, which is inefficient, and cannot provide timely and accurate safety prompt for the driver and others, and cannot effectively avoid the drunk driving behavior. Therefore, the application discloses a vehicle-mounted anti-drunk driving method based on multi-sensor fusion detection. The technical key point of the application is that the system is started and initialized when detecting the automobile ignition, and is connected with the automobile brake module, the system realizes full-automatic detection and reminding, and the drunk driving is completely eliminated from the root, the alcohol sensor is used for preliminarily testing and judging the alcohol concentration of the driving position, the K-shaped thermocouple is further used for detecting the body temperature of the driver to reduce the misjudgment degree of the drunk driving detection, the network information warning is combined, the infrared sensors are placed at multiple positions of the vehicle body to detect whether there are passengers at the positions, and the corresponding processing method is intelligently selected, the drunk driving behavior is avoided through the parallel mode of the legal deterrence to the driver and the persuasion of others.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of automobile safety, and particularly relates to a vehicle-mounted anti-drunk driving method based on multi-sensor fusion detection. BACKGROUND

[0002] In recent decades, the rapid development of China's economy has also brought about the rapid development of the automobile industry. China's automobile sales have ranked first in the world for eight consecutive years, and the number of private cars has also increased sharply. Cars have become the most indispensable means of transportation in people's daily life. At the same time, due to the complexity of drivers, vehicles and road traffic environment, the number of automobile accidents is also rising, and a large part of the accidents are related to drunk driving. Drunk driving has become one of the main causes of traffic fatalities and a major threat to traffic safety. Drunk driving is a serious traffic violation with high risk. Alcohol can affect the reaction ability, attention, judgment and coordination ability of the driver, increasing the risk of traffic accidents. Drunk driving not only threatens the life safety and physical health of the driver himself, but also may bring great risk and property loss to other road users. Traffic management departments have also continuously increased the punishment for drunk driving.

[0003] The existing alcohol breath alcohol detection is difficult to monitor in real time due to the large difference in detection instruments, the accuracy and stability are easily affected by the environment, and the police need to participate in the detection, which has randomness and other factors, and cannot comprehensively detect each driving vehicle. Therefore, there is an urgent need for a device that can automatically detect the alcohol of the driver when the car starts. This way can greatly reduce the occurrence of drunk driving accidents and ensure the safety of the passengers. SUMMARY

[0004] In view of the above technical problems, the purpose of the present application is to provide a full-automatic detection system based on a device that can automatically detect the alcohol of the driver when the vehicle starts, and automatically remind the driver when the detection result reaches the drunk driving standard. It is convenient, fast and has high detection accuracy.

[0005] To achieve the above purpose, the present application provides the following technical scheme: the K-shaped thermocouple sensing module (2) adopts MAX6675 module, the microcontroller (3) adopts STM32F103C8T6 single-chip microcomputer, the microcontroller (1) adopts MQ-3 alcohol sensing module, and the voice broadcast system adopts SYN6658 voice synthesis module. The three-way infrared detection module adopts a pyroelectric infrared sensor (6).

[0006] The alcohol concentration of the driver is detected by using the microcontroller (1) and the K-shaped thermocouple sensor through the STM32 single-chip microcomputer as a microcontroller (3), the detection result is output through the voltage size, the voltage is converted into a digital signal through a digital-analog converter and transmitted to the single-chip microcomputer for calculation, and the obtained result is displayed through a liquid crystal display screen LCD1602. When the alcohol concentration of the driver exceeds the threshold value set in advance, the microcontroller (3) controls the SYN6658 voice module to make the full-frequency sound box speaker issue a voice warning, and prevents the driver from starting the car through the car braking module, the GPS positioning module determines the current position of the vehicle, and sends the vehicle position information and the detection result to the emergency contact person set in advance by the driver through a short message, and dials a phone call to the emergency contact person through the Bluetooth calling module.

[0007] A kind of vehicle-mounted anti-drunk driving method of multi-sensor fusion detection, see Figure 1 , including microcontroller (3), digital-analog conversion module, microcontroller (1), K-shaped thermocouple sensing module (2), signal amplification circuit, automobile brake module, GPS positioning module, wireless communication module, voice broadcast system, display screen module (5);The microcontroller (3) is electrically connected with digital-analog conversion module, K-shaped thermocouple sensing module (2), automobile brake module, GPS positioning module, Bluetooth calling module, voice broadcast system, display screen module (5) respectively;The microcontroller (3) is connected with automobile ignition control module by relay;The alcohol sensor is electrically connected with signal amplification circuit;The signal amplification circuit is electrically connected with digital-analog conversion module;The thermocouple sensing module is electrically connected with passive buzzer;The voice broadcast system is electrically connected with sound box.

[0008] See Figure 3 K-shaped thermocouple temperature measurement module workflow diagram, when the body temperature condition of the driver is abnormal, the system detects decoupling, and the LCD display screen displays the "decoupling" character and the abnormal body temperature of the driver.According to the K-type thermocouple temperature measurement principle, the output thermoelectric potential of the thermocouple is related to not only the temperature of the measurement end, but also the temperature of the cold end, and the system uses software compensation.MAX6675 performs laser correction on internal component parameters, thereby internally correcting the nonlinearity of the K-shaped thermocouple.The cold end compensation circuit, non-linear correction circuit and decoupling detection circuit integrated in MAX6675 greatly facilitate the use of the system.

[0009] See Figure 4 , the infrared sensor (6) is placed around the passenger seat, and in a four-seat passenger car, the infrared sensor (6) can be placed at the passenger seat door to form a network, for detecting whether there is a passenger in the passenger seat, and facilitating the automatic reminding device.

[0010] SeeFigure 5 The autonomous warning device, the infrared sensor (6) network placed in the passenger seat around the initial, if the passenger seat is detected by passengers to make the automatic warning system broadcast text one, if the infrared sensor (6) does not detect the passenger, the automatic warning system broadcast text two, send text three information and dial the driver set in advance the emergency contact.

[0011] Text one: "Driver, please note that you are now driving in a state of drunk driving, which is illegal behavior, in order to your and others' safety, please turn off the engine, stop immediately and find other safe travel mode. Passengers, please note that the driver is in a state of drunk driving, please discourage the driver from driving the car under the premise of ensuring your own safety, help us prevent potential danger."

[0012] Text two: "Driver, please note that you are now driving in a state of drunk driving, which is illegal behavior, in order to your and others' safety, please turn off the engine, stop immediately and find other safe travel mode."

[0013] Text three: "Real-time location, landmark building has - driver now driving in a state of drunk driving, which is illegal behavior, in order to the safety of the driver, please help the driver replace other safe travel mode."

[0014] The principle of the alcohol detection is: according to the GB / T19522-2010 test standard to complete the corresponding value setting, the relationship between the alcohol content in breath and blood is: ρblood=ρbreath*2200 (unit: mg / L), then the single-chip microcomputer compares the pre-set threshold value (the national standard for drinking driving is 200 mg / L) according to the alcohol concentration data read by the sensor, and sends an alarm prompt information (indicating driving danger) in the case of detection result exceeding the set threshold value.

[0015] The theoretical value calculation of the drunk driving detection system mainly involves alcohol sensor and human reaction sensor. The specific calculation method is as follows:

[0016] The alcohol concentration value C (mg / L) measured by the alcohol sensor needs to be corrected by the calibration coefficient Kc of the sensor, and the corrected alcohol concentration value is:

[0017] C'=C*Kc

[0018] Wherein, C' is the corrected alcohol concentration value.

[0019] The reaction value R measured by the human reaction sensor needs to be corrected by the calibration coefficient Kr of the sensor, and the corrected reaction value is:

[0020] R'=R*Kr

[0021] Wherein, R' is the corrected reaction value.

[0022] The theoretical value of the drunk driving detection system can be calculated by comparing the corrected alcohol concentration value and the reaction value. Generally, when the alcohol concentration value is higher than a certain threshold, the human reaction will be significantly weakened or disappeared, so this threshold can be used as a judgment standard

[0023] Compared with the prior art, the beneficial effects of the present application are:

[0024] (1) The system has simple structure, low cost, convenient operation, high measurement accuracy, and good application prospect. It has high sensitivity and good linearity.

[0025] (2) The drunk driving detection instrument supports data recording and transmission, can automatically upload the measurement results to the server, facilitates subsequent data analysis and statistics, adopts intelligent algorithm, can automatically calibrate and adjust the parameters of the sensor, improves the test efficiency and ensures the accuracy of the detection results.

[0026] (3) Fully automated, saving manpower and resources. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall module.

[0028] Figure 2 It is a system flowchart.

[0029] Figure 3 It is a K-shaped thermocouple temperature measurement module (2) working flowchart.

[0030] Figure 4 It is the reference placement position of the infrared sensor (6) in the passenger seat of a four-seater passenger car.

[0031] Figure 5 It is an automatic reminder device flowchart.

[0032] Figure 6 It is a system hardware layout diagram. DETAILED DESCRIPTION

[0033] System working process: see Figure 2, the alcohol sensor (1) will collect information after the car is started, and the collected information will be reported to the microcontroller (3), the microcontroller (3) receives the data transmitted by the alcohol sensor (1) and analyzes it, compares it with the threshold value set in advance by the system, if the alcohol content of the driver does not exceed the threshold value set in advance, the car is allowed to start normally, if it exceeds, the K-shaped thermocouple module (2) will further collect information, and the collected information will be reported to the microcontroller (3), the microcontroller (3) receives the data transmitted by the K-shaped thermocouple module (2) and analyzes it, compares it with the threshold value set in advance by the system, if the judgment result is that the temperature is not abnormal, it means that the drunk person is not the driver on the driver's seat, the system allows the car to start normally, and the detection result is presented through the display screen (5), if the temperature is abnormal, it proves that the drunk person is the driver on the driver's seat, the system triggers the automatic reminding device, if the infrared sensor (6) detects that there is a passenger, the voice broadcast module (4) broadcasts text one, that is, "Driver, please pay attention, you are now driving in a drunk driving state, which is illegal behavior, in order to ensure the safety of yourself and others, please stop the car immediately and find other safe travel ways. Passengers, please pay attention, the driver is in a drunk driving state, please persuade the driver to start the car under the premise of ensuring your own safety, help us prevent potential dangers", if the infrared sensor (6) does not detect a passenger, the GPS determines the location of the vehicle, the voice broadcast module (4) broadcasts text two information, that is, "Driver, please pay attention, you are now driving in a drunk driving state, which is illegal behavior, in order to ensure the safety of yourself and others, please turn off the engine and stop the car immediately and find other safe travel ways.", sends text three information, that is, "real-time location, landmark building has - driver is now driving in a drunk driving state, which is illegal behavior, in order to ensure the safety of the driver, please help the driver replace other safe travel ways." and dials the emergency contact person set in advance by the driver.

[0034] The alcohol sensor (1) can collect air and analyze the alcohol content in the air, amplify and filter the signal, amplify the signal and filter out the noise by the filter, then send it to the digital-to-analog conversion circuit, at this time the signal is converted into a voltage signal easy to transmit and process, and transmitted to the microcontroller (3). The voltage signal obtained is transmitted into the microcontroller (3) and compared with the threshold value set in advance, if the judgment result is that the alcohol content does not exceed the threshold value set in advance, the car is allowed to start normally. If the judgment result is that the alcohol content exceeds the threshold value set in advance, further judge the data of the K-shaped thermocouple module (2).

[0035] Case 1 (driver is in a state of drunk driving, there are passengers in the car): the car ignition will trigger the microcontroller (3) to collect information, and the collected information is reported to the microcontroller (3), the microcontroller (3) receives the data transmitted by the alcohol sensor (1) and analyzes and compares it with the threshold value set in advance by the system, if the alcohol content exceeds the threshold value set in advance, further trigger the K-shaped thermocouple to collect information, and the collected information is reported to the microcontroller (3), the microcontroller (3) receives the data transmitted by the K-shaped thermocouple module (2) and analyzes and compares it with the threshold value set in advance by the system, if the judgment result is temperature abnormality, the driver is in a state of drunkenness, the system triggers the automatic reminding device, the microcontroller (3) prompts the car brake module to prohibit the car to start, the infrared sensor (6) network initializes, detects that there are passengers in the passenger seat, and then broadcasts text one "driver, please pay attention, you are now driving in a state of drunk driving, which is illegal behavior, in order to ensure the safety of yourself and others, please stop the car immediately and find other safe travel ways. Passengers, please pay attention, the driver is in a state of drunk driving, please persuade the driver to start the car under the premise of ensuring your own safety, help us prevent potential dangers" through the voice broadcast module (4), and the control circuit detects that the driver does not turn off the engine, then the microcontroller (3) controls the car brake module to forcibly turn off the engine.

[0036] Case 2 (driver in drunk driving state, no passengers in the car): the car ignition will trigger the alcohol sensor (1) to collect information, and report the collected information to the microcontroller (3), the microcontroller (3) receives the data from the alcohol sensor (1) and analyzes and compares it with the threshold value set in advance, if the alcohol content exceeds the threshold value set in advance, further trigger the K-shaped thermocouple module (2) to collect information, and report the collected information to the microcontroller (3), the microcontroller (3) receives the data from the K-shaped thermocouple module (2) and analyzes and compares it with the threshold value set in advance, if the judgment result is temperature abnormality, the driver is in a drunken state, the system triggers the automatic reminding device, the microcontroller (3) prompts the car brake module to prohibit the car to start, the infrared sensor (6) network initializes, detects that there is no passenger in the passenger seat, determines the location of the vehicle through GPS, the voice broadcast module (4) broadcasts text two information, that is, "driver, please pay attention, you are now driving in a drunk driving state, which is illegal behavior, in order to your and others' safety, please you please turn off the engine and park immediately and find other safe travel ways.", sends text three information, that is, "real-time location, landmark building has-driver is now driving in a drunk driving state, which is illegal behavior, in order to the safety of the driver, please help the driver replace other safe travel ways.", and dials the phone to the emergency contact person set in advance by the driver, if the control circuit detects that the driver does not turn off the engine, the microcontroller (3) controls the car brake module to forcibly turn off the engine.

Claims

1. A vehicle-mounted anti-drunk driving method using multi-sensor fusion detection, characterized by: When the car is ignited, the alcohol sensor (1) is triggered to collect the alcohol content in the air of the driver's seat, and the collected alcohol data is processed by the signal amplification circuit and the digital-to-analog conversion module and transmitted to the microcontroller (3). The microcontroller (3) displays the received data on the display screen module (5) and compares it with the alcohol threshold value set in advance by the system. If the threshold value does not exceed the threshold value set in advance, the car is allowed to start normally. If the threshold value exceeds the threshold value, the K-shaped thermocouple sensing module (2) is further triggered to collect the driver's body temperature data and transmit the data to the microcontroller (3). The microcontroller (3) displays the received body temperature data on the display screen module (5) and compares it with the temperature threshold value set in advance by the system. If the threshold value does not exceed the threshold value set in advance, the car is allowed to start normally. If the threshold value exceeds the threshold value, the person detection module is triggered to determine whether there are passengers in the car. If there are passengers in the car, the passengers are reminded to dissuade the driver and the dangers of drunk driving are broadcasted. If not, the autonomous warning device broadcasts the dangers of drunk driving and seeks help from emergency contacts. The control circuit detects whether the driver turns off the engine. If not, the microcontroller (3) forces the car to shut down through the car brake module.

2. A vehicle-mounted anti-drunk driving method based on multi-sensor fusion detection according to claim 1, characterized in that The entire system includes a K-shaped thermocouple module (2) and an alcohol sensor (1) for detecting drunk driving of a driver, an automatic reminder device for the driver and relatives of drunk driving, a car braking module for preventing the car from starting, a personnel monitoring module for detecting the personnel and positions in the car, and a microcontroller (3) for controlling each module and comparing the information collected by the sensor with a pre-set threshold value.

3. The vehicle-mounted anti-drunk driving method of multi-sensor fusion detection according to claim 1 is characterized in that Only after the alcohol content in the air of the driver's seat is collected by the alcohol sensor (1) and the microcontroller (3) determines that it exceeds the alcohol threshold set in advance, can the K-type thermocouple module (2) be further triggered to determine whether the driver is in a drunk driving state.

4. The vehicle-mounted anti-drunk driving method using multi-sensor fusion detection according to claim 1 is characterized by: The personnel monitoring module is composed of an infrared sensor (6) network. The personnel monitoring module is connected to a microcontroller (3). When both alcohol data and body temperature data are abnormal, the personnel monitoring module is activated. The personnel monitoring module monitors whether there are other passengers in the car except the driver. If there are, the autonomous warning device is activated to control the voice broadcast module (4) to remind the passengers and broadcast the dangers of drunk driving, so as to urge the passengers to dissuade the driver from driving drunk. If there are no other passengers, the positioning system and the wireless data transmission module are used to seek help from emergency contacts.

5. The vehicle-mounted anti-drunk driving method using multi-sensor fusion detection according to claim 1 is characterized by: The autonomous warning device is triggered after the personnel monitoring module completes processing, and includes a voice broadcast module (4), a text message reminder module, a wireless data transmission module, a remote audio and video start module, a positioning system, and a control circuit. The automatic warning device is connected to the microcontroller (3) and the personnel monitoring module, wherein the control circuit is used to detect whether the driver has turned off the engine after the voice broadcast module (4) and the text message reminder module have taken effect.

6. The vehicle-mounted anti-drunk driving method of multi-sensor fusion detection according to claim 1 is characterized in that :The system's real-time detection results will be uploaded to the server each time, and the relevant management agencies can remotely monitor the driver's drunk driving situation in real time.

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