Breath alcohol self-test system and method

Abstract

The application provides a breath alcohol self-detection system and method. The breath alcohol self-detection system is used for self-detection of breath alcohol of a driver of a vehicle, and comprises a self-detection unit, a control unit electrically connected with the self-detection unit, and a to-be-detected state detection unit electrically connected with the control unit, wherein the self-detection unit comprises an alcohol detector. The breath alcohol self-detection system and method are simple in operation, convenient to use, and can be widely applied.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of breath alcohol detection, in particular to a breath alcohol self-detection system and method. BACKGROUND

[0002] Drunk driving is a serious violation of public traffic safety. Traffic management departments generally use rapid alcohol detection instruments to detect suspected drunk drivers on the roadside, and then use breath alcohol detection instruments or blood tests to confirm the evidence. Through the efforts of traffic management departments, drunk driving has achieved obvious results, but due to the large number of vehicle owners and drivers in China, and the widespread habit of drinking, drunk driving accidents still occur from time to time. According to statistics, drunk driving has become the largest crime in China, and since drunk driving usually occurs at night or even late at night, traffic management departments cannot be on duty on the road 24 hours a day due to manpower and funding reasons, which also creates a sense of complacency among some drunk drivers. Therefore, although traffic management departments have spent a lot of manpower and material resources, it is difficult to make greater breakthroughs in drunk driving governance. It is necessary to change the way of drunk driving governance to completely solve the problem of drunk driving.

[0003] Drunk driving is a social problem, and checking drunk driving on the road every day is like a strong medicine that will have an effect in the short term, but in the long term, due to manpower and resource limitations, it cannot be completely eradicated. Therefore, we can refer to the medical principle of "prevention being greater than cure" to solve this social problem. Traffic management departments checking drunk driving is equivalent to treatment, which can only treat the symptoms, and to treat the root cause, we need to prevent drunk driving from happening. Looking at drunk driving in society, most of it is from drinking in hotels and then driving, and a small part is from drinking at home and then driving, so if we can prevent people from driving after drinking in hotels, we can prevent most drunk driving from happening. The current call for chauffeurs is a good initiative, but chauffeur services do not cover all areas, sometimes a car cannot be called, and the cost is high. Many people do not have the awareness of finding a chauffeur after drinking, thinking that they may not encounter a police officer when drunk driving and can escape, so the rate of chauffeur service is not high. In cities, hotels generally provide parking services, and hotels also have the responsibility and obligation to remind guests not to drive after drinking, so if we can prevent drunk drivers from driving on the road after drinking in hotels, we can achieve the goal of prevention being greater than cure.

[0004] The Chinese patent application No. 202110064937 discloses a parking lot face recognition based anti-drunk driving checkpoint, which comprises a machine body, a range finder is fixedly arranged in the right wall of the machine body, the range finder judges the parking distance of the vehicle through laser, a right upper two-opening blocking rod cavity is arranged above the range finder, a motor with output shaft forward is fixedly arranged in the rear wall of the blocking rod cavity, a front and rear extending shaft is fixedly arranged at the end of the output shaft of the motor, and a blocking rod is fixedly arranged on the outer surface of the shaft away from the motor and penetrating through the blocking rod cavity, the identity of the driver is confirmed through face recognition, so as to avoid others from impersonating the driver to perform alcohol detection, and facilitate the subsequent camera detection of whether there is a person driving in the middle, whether to release is judged through the alcohol content of the driver, thereby reducing the probability of drunk driving, and the mechanical claw and the push plate are used to replace the blowing pipe once, so as to avoid cross infection of diseases.

[0005] However, the above scheme has the problems of troublesome operation and inconvenient use, and is difficult to popularize. SUMMARY

[0006] The purpose of the present application is to provide an exhalation alcohol self-detection system which is simple to operate, convenient to use and can be widely applied.

[0007] The purpose of the present application is to provide an exhalation alcohol self-detection system which is simple to operate, convenient to use and can be widely applied.

[0008] In order to achieve the above purpose, the present application provides an exhalation alcohol self-detection system for self-exhalation alcohol detection of a driver of a vehicle, comprising a self-detection unit, a control unit electrically connected with the self-detection unit, and a to-be-detected state detection unit electrically connected with the control unit, wherein the self-detection unit comprises an alcohol detector.

[0009] The to-be-detected state detection unit is used to detect whether the vehicle driven by the to-be-detected driver is in a state of waiting for self-exhalation alcohol detection, and if so, sends a signal to the control unit to start the exhalation alcohol self-detection operation.

[0010] The control unit is used to control the self-detection unit to perform the exhalation alcohol self-detection operation according to the start exhalation alcohol self-detection signal provided by the to-be-detected state detection unit.

[0011] The self-detection unit is used to perform the exhalation alcohol self-detection operation according to the control signal of the control unit.

[0012] The to-be-detected state detection unit uses a vehicle driving state detection sensor for detection, which is an ultrasonic distance sensor, an infrared distance sensor or a laser distance sensor.

[0013] The vehicle driving state detection sensor is one or two ultrasonic distance sensors.

[0014] The to-be-detected state detection unit uses a camera to detect.

[0015] The to-be-detected state detection unit uses a face detection positioning method to detect, which can directly determine whether the driver has been positioned in front of the detection point of the breath alcohol self-detection for breath alcohol self-detection.

[0016] The camera of the to-be-detected state detection unit can take a side face or a front face of the driver.

[0017] The range of the camera of the to-be-detected state detection unit for taking a side face of the driver is that the included angle of the camera relative to the face is between 45 degrees and 90 degrees.

[0018] The camera is at an angle of 45 degrees with the driving direction of the vehicle.

[0019] The to-be-detected state detection unit uses a video detection method to detect, which can determine whether the vehicle is in a stationary state, and further determine whether the driver has parked the vehicle at a suitable position for breath alcohol self-detection.

[0020] The camera continuously takes photos of the side of the vehicle driving to the detection point of the breath alcohol self-detection, and compares the similarity of the two photos respectively. If the similarity of the two photos exceeds a predetermined value, it is considered that the vehicle is in a stationary state, otherwise it is considered that the vehicle is still in the process of moving. If it is determined that the vehicle is in a stationary state, and the stationary state exceeds a predetermined time, it is determined that the driver has parked at a suitable position for breath alcohol self-detection, and the to-be-detected state detection unit sends a signal to the control unit to start the breath alcohol self-detection operation.

[0021] When analyzing the photos taken each time, only a part of the lower half of the photo is extracted for similarity judgment.

[0022] The self-detection unit further includes a vehicle distance detection unit electrically connected to the control unit, an alcohol instrument conveying unit electrically connected to the control unit, a detection result disposal unit electrically connected to the control unit, and an alcohol instrument storage; the alcohol detection instrument is placed on the alcohol instrument conveying unit;

[0023] The alcohol instrument storage is used to accommodate the alcohol detection instrument when the breath alcohol detection operation is not started, and provides protection for the alcohol detection instrument. At the same time, the position of the alcohol instrument storage defines the detection point of the breath alcohol self-detection.

[0024] The vehicle distance detecting unit is used to detect the distance between the vehicle distance detecting unit and the side of the vehicle driven by the driver to be tested, and send the distance detection result to the control unit for the control unit to calculate the distance of the alcohol instrument delivery unit to send the alcohol detector to the side of the vehicle;

[0025] The alcohol instrument delivery unit is used to send the alcohol detector from the alcohol instrument warehouse to a suitable position for the driver to be tested to pick up the alcohol detector for breath alcohol detection according to the instruction of the control unit, and retract the alcohol detector to the alcohol instrument warehouse according to the instruction of the control unit;

[0026] The alcohol detector is used for the driver to be tested to perform self-service breath alcohol detection, and send the breath alcohol detection result to the control unit, and send the homing signal to the control unit after the alcohol detector is homed;

[0027] The detection result disposal unit is used to perform corresponding operation according to the disposal instruction of the control unit;

[0028] The control unit is used to control the alcohol instrument delivery unit to send the alcohol detector from the alcohol instrument warehouse to the direction of the driver to be tested according to the start breath alcohol self-detection signal provided by the detection state detecting unit, and control the distance of the alcohol instrument delivery unit to send the alcohol detector according to the distance between the vehicle distance detecting unit and the side of the vehicle driven by the driver to be tested provided by the vehicle distance detecting unit;

[0029] The control unit is also used to control the alcohol instrument delivery unit to retract the alcohol detector to the alcohol instrument warehouse according to the homing signal sent by the alcohol detector after obtaining the breath alcohol detection result;

[0030] The control unit is also used to send corresponding disposal instruction to the detection result disposal unit according to the breath alcohol detection result of the alcohol detector.

[0031] The vehicle distance detecting unit adopts a vehicle position sensor for detection, which is an ultrasonic distance sensor, an infrared distance sensor or a laser distance sensor;

[0032] The alcohol instrument delivery unit adopts a transmission mechanism, which can be extended and retracted from the alcohol instrument warehouse, and an alcohol instrument support is arranged at the extended end to place the alcohol detector;

[0033] UV disinfection LED lamps electrically connected with the control unit are arranged around the position corresponding to the retracted alcohol detector in the alcohol instrument warehouse, and when the breath alcohol detection is completed and the alcohol detector is retracted into the alcohol instrument warehouse, the UV disinfection LED lamps on the four walls of the alcohol instrument warehouse will be lit and kept for a certain time to disinfect the alcohol detector;

[0034] The alcohol detector comprises an obstacle detection sensor arranged on the handle of the alcohol detector and facing the driver to be detected, which is used to detect whether there is an obstacle in front of the alcohol detector during the extension of the alcohol detector transmission unit, and transmit the obstacle detection result to the control unit, and the control unit determines whether to continue or stop transmitting the alcohol detector according to the obstacle detection result.

[0035] The detection result processing unit comprises a gate, which is electrically connected with the control unit, located near the detection point and in front of the vehicle driven by the driver to be detected, and has a motor and a controller in the gate and a blocking rod outside the gate, the motor is connected with the blocking rod through a speed reducer and can rotate the blocking rod to lift or lower the blocking rod; when the alcohol detection result is determined as non-drunk driving, the control unit controls the gate to lift the blocking rod to release the vehicle; when the alcohol detection result is determined as drunk driving, the control unit controls the blocking rod of the gate to be stationary, and the vehicle cannot pass through.

[0036] The detection result processing unit further comprises an alarm device, which is a warning light, a sound box or a combination thereof, when the alcohol detection result is determined as non-drunk driving, the control unit controls the warning light to display a green light to release the vehicle, or controls the sound box to broadcast a prompt for releasing the vehicle, or both; when the alcohol detection result is determined as drunk driving, the control unit controls the warning light to display a red light to not release the vehicle, or controls the sound box to broadcast a prompt for not releasing the vehicle, or both.

[0037] The application also provides a breath alcohol self-detection method, which comprises the following steps:

[0038] Step S1, detecting whether the vehicle driven by the driver to be detected is in a state of waiting for self-detection of breath alcohol, and if so, sending a signal to the control unit;

[0039] Step S2, the control unit receives the signal that the vehicle driven by the driver to be detected is in a state of waiting for self-detection of breath alcohol, and starts the breath alcohol self-detection operation;

[0040] Step S3, the control unit controls the self-detection unit to perform the breath alcohol self-detection operation;

[0041] Step S4, the self-detection unit performs the breath alcohol self-detection operation according to the control signal of the control unit.

[0042] The step S1 is implemented by a detection state detection unit, which uses a vehicle driving state detection sensor or a camera for detection, and the vehicle driving state detection sensor is an ultrasonic distance sensor, an infrared distance sensor or a laser distance sensor.

[0043] The vehicle driving state detection sensor is one or two ultrasonic distance sensors.

[0044] The to-be-inspected state detection unit adopts a face detection positioning method to detect whether the driver has positioned in front of the detection point of the breath alcohol self-detection device to be ready for the breath alcohol self-detection.

[0045] The camera of the to-be-inspected state detection unit can take a side face or a front face of the driver.

[0046] The camera of the to-be-inspected state detection unit takes a side face of the driver within an angle range of 45 degrees to 90 degrees between the camera and the face.

[0047] The camera is at an angle of 45 degrees with the driving direction of the vehicle.

[0048] The to-be-inspected state detection unit adopts a video detection method to detect whether the vehicle is in a stationary state, and then determine whether the driver has parked the vehicle at a proper position to be ready for the breath alcohol self-detection.

[0049] The camera continuously takes photos of the side of the vehicle driving to the detection point, and compares the similarity of the two photos respectively, if the similarity of the two photos exceeds a predetermined value, it is considered that the vehicle is in a stationary state, otherwise it is considered that the vehicle is still in the process of moving; if it is determined that the vehicle (9) is in a stationary state, and the stationary state exceeds a predetermined time, it is determined that the driver has parked the vehicle at a proper position to be ready for the breath alcohol self-detection, and the to-be-inspected state detection unit sends a signal to the control unit to start the breath alcohol detection operation.

[0050] When analyzing the photos taken each time, only a part of the lower half of the photo is extracted for similarity judgment.

[0051] The step S4 includes the following steps:

[0052] Step S41, the vehicle distance detection unit detects the distance between the vehicle distance detection unit and the side of the vehicle driven by the to-be-inspected driver, and sends the distance detection result to the control unit;

[0053] Step S42, the control unit controls the alcohol instrument conveying unit to send out the alcohol detection instrument from the alcohol instrument storage, and controls the distance of sending out the alcohol detection instrument by the alcohol instrument conveying unit according to the distance between the vehicle distance detection unit and the side of the vehicle driven by the to-be-inspected driver provided by the vehicle distance detection unit;

[0054] Step S43, after the to-be-inspected driver picks up the alcohol detection instrument from the alcohol instrument conveying unit to perform breath alcohol detection, the alcohol detection instrument performs breath alcohol detection and sends the breath alcohol detection result to the control unit;

[0055] Step S44, the control unit sends an instruction to the detection result processing unit according to the breath alcohol detection result of the alcohol detector;

[0056] Step S45, the detection result processing unit performs corresponding operation according to the processing instruction of the control unit;

[0057] Step S46, after the driver to be detected returns the alcohol detector, the alcohol detector detects that the alcohol detector is homed, and sends a homing signal to the control unit;

[0058] Step S47, the control unit controls the alcohol detector conveying unit to retract the alcohol detector to the alcohol detector storage.

[0059] The step S4 further comprises: step S48, turning on the UV disinfection LED lamp in the alcohol detector storage to disinfect the alcohol detector for next use.

[0060] The step S1 further comprises step S0, the vehicle distance detection unit detects that a vehicle approaches, and the indicator light flashes.

[0061] The step S1 further comprises: if the vehicle driven by the driver to be detected is not in the state of waiting for self-service breath alcohol detection, then after exceeding a preset time, the step S41 is entered.

[0062] The present application has the advantages that the breath alcohol self-service detection system and method are used for self-service breath alcohol detection of drivers driving vehicles, are simple to operate, convenient to use, and can be widely applied. BRIEF DESCRIPTION OF DRAWINGS

[0063] For further understanding of the features and technical contents of the present application, please refer to the following detailed description and drawings of the present application, however, the drawings are provided for reference and illustration only, and are not used to limit the present application.

[0064] In the drawings,

[0065] Figure 1 It is a module schematic diagram of electrical connection between the control unit, the detection state detection unit and the self-service detection unit of the breath alcohol self-service detection system of the present application;

[0066] Figure 2 It is a module schematic diagram of electrical connection between the control unit and the detection state detection unit of the breath alcohol self-service detection system of the present application when the vehicle driving state detection sensor is used for detection;

[0067] Figure 3 It is a module schematic diagram of electrical connection between the control unit and the detection state detection unit of the breath alcohol self-service detection system of the present application when the camera is used for detection;

[0068] Figure 4A product schematic diagram of the breath alcohol self-detection system of the present application;

[0069] Figure 5 And Figure 6 A position layout schematic diagram of the breath alcohol self-detection system of the present application when performing self-help breath alcohol detection on a driver of a vehicle;

[0070] Figure 7 A flowchart of the breath alcohol self-detection method of the present application;

[0071] Figure 8 A flowchart of step S4 of the breath alcohol self-detection method of the present application. DETAILED DESCRIPTION

[0072] In order to further illustrate the technical means adopted by the present application and its effects, the preferred embodiments of the present application and its accompanying drawings are described in detail below.

[0073] As Figures 1 to 4 shown, the present application provides a breath alcohol self-detection system for performing self-help breath alcohol detection on a driver 10 of a vehicle 9, which comprises a self-detection unit 1, a control unit 2 electrically connected with the self-detection unit 1, and a to-be-detected state detection unit 3 electrically connected with the control unit 2, wherein the self-detection unit 1 comprises an alcohol detector 6.

[0074] The self-detection unit 1 is used to perform breath alcohol self-detection operation according to the control signal of the control unit 2.

[0075] The to-be-detected state detection unit 3 is used to detect whether the vehicle 9 driven by the to-be-detected driver 10 is in a state of waiting for self-help breath alcohol detection, that is, the present breath alcohol self-detection system detects and judges whether the to-be-detected driver 10 has parked in place and is in a state of waiting for self-help breath alcohol detection, and the so-called parking in place means that the driver 10 has parked the vehicle to a proper position in front of the detection point to facilitate the subsequent self-help breath alcohol detection by directly reaching out for the alcohol detector 6 on the vehicle, and if so, a signal is sent to the control unit 2 to start the breath alcohol self-detection operation.

[0076] The control unit 2 is used to control the self-detection unit 1 to perform breath alcohol self-detection operation according to the start breath alcohol self-detection signal provided by the to-be-detected state detection unit 3.

[0077] The self-detection unit 1 further comprises a vehicle distance detection unit 4 electrically connected with the control unit 2, an alcohol detector conveying unit 5 electrically connected with the control unit 2, a detection result disposal unit 7 electrically connected with the control unit 2, and an alcohol detector storage 8; and the alcohol detector 6 is placed on the alcohol detector conveying unit 5.

[0078] The alcohol instrument bin 8 is used to accommodate the alcohol detector 6 when the breath alcohol self-detection operation is not started, to provide protection for the alcohol detector 6, and to sterilize the alcohol detector 6. At the same time, the position of the alcohol instrument bin 8 is defined as the detection point of the breath alcohol self-detection, so as to be used as the identification point when the driver 10 is waiting for detection. Of course, those skilled in the art should know that the detection point of the breath alcohol self-detection can also be other signs or markings, and is not necessarily the position of the alcohol instrument bin 8. The alcohol instrument bin 8 is more conspicuous and together with the alcohol detector 6 that needs to be picked up, so as to facilitate the driver 10 to identify.

[0079] The vehicle distance detection unit 4 is used to detect the distance between the vehicle distance detection unit 4 and the side of the vehicle 9 driven by the to-be-detected driver 10, that is, through the vehicle distance detection unit 4, it can be known that the distance between the side of the last stopped vehicle 9 and the alcohol detector 6 before the alcohol detector 6 is extended is how much, and the distance detection result is sent to the control unit 2 so as to calculate the distance that the alcohol instrument conveying unit 5 needs to send the alcohol detector 6 to the side of the vehicle 9, so as to facilitate the driver 10 to directly take the alcohol detector 6 on the vehicle to perform self-breath alcohol detection.

[0080] The alcohol instrument conveying unit 5 is used to send the alcohol detector 6 from the alcohol instrument bin 8 to a suitable position according to the instruction of the control unit 2, so that the to-be-detected driver 10 can pick up the alcohol detector 6 to perform self-breath alcohol detection, and retract the alcohol detector 6 to the alcohol instrument bin 8 according to the instruction of the control unit 2.

[0081] The alcohol detector 6 is used for the to-be-detected driver 10 to perform self-breath alcohol detection, and sends the breath alcohol detection result to the control unit 2. After the alcohol detector 6 is homed, a homing signal is sent to the control unit 2.

[0082] The detection result processing unit 7 is used to perform corresponding operations according to the processing instruction of the control unit 2, such as broadcasting the detection result, implementing the operation of releasing or prohibiting the release, light indication, etc.

[0083] The control unit 2 is used to control the alcohol instrument conveying unit 5 to send the alcohol detector 6 from the alcohol instrument bin 8 to the direction of the to-be-detected driver 10 according to the start breath alcohol self-detection signal provided by the to-be-detected state detection unit 3, and to control the distance that the alcohol instrument conveying unit 5 sends the alcohol detector 6 according to the distance between the vehicle distance detection unit 4 and the side of the vehicle 9 driven by the to-be-detected driver 10 provided by the vehicle distance detection unit 4.

[0084] The control unit 2 is also used to control the alcohol instrument conveying unit 5 to retract the alcohol detector 6 to the alcohol instrument bin 8 according to the homing signal sent by the alcohol detector 6 after obtaining the breath alcohol detection result.

[0085] The control unit 2 is also used to send corresponding disposal instructions to the detection result disposal unit 7 according to the breath alcohol detection result of the alcohol detector 6.

[0086] It can be understood that the self-service detection unit 1, the control unit 2, and the to-be-detected state detection unit 3 of the breath alcohol self-service detection system of the present application can be realized by using the corresponding technical solutions described above. It can be understood that the vehicle distance detection unit 4, the alcohol detector conveying unit 5, the alcohol detector 6, the detection result disposal unit 7, and the alcohol detector warehouse 8 of the self-service detection unit 1 of the present application can be realized by using the corresponding technical solutions described above. The following describes the optimization scheme of the inventor in the implementation of the breath alcohol self-service detection system of the present application.

[0087] As shown in Figure 5 and Figure 6 , the alcohol detector warehouse 8 and other related equipment of the breath alcohol self-service detection system are located on one side of the roadbed of the road 12, there are vehicles 9 passing through in the direction of the arrow on the road 12, the driver 10 sits in the driving position, and the arm 11 of the driver 10 can be stretched out of the window to pick up the alcohol detector 6 outside the window to perform breath alcohol self-service detection. The gate 71 and the barrier 712 are located in front of the alcohol detector warehouse 8, and the to-be-detected state detection unit 3 is located between the alcohol detector warehouse 8 and the gate 71. Of course, the to-be-detected state detection unit 3 can also be integrated with the gate 71 and located on the gate 71.

[0088] The to-be-tested state detection unit 3 detects by using a vehicle running state detection sensor 31. The vehicle running state detection sensor 31 can be an ultrasonic distance sensor, or an infrared or laser distance sensor. Since the vehicle 9 has a very small speed when it runs to the detection point of the breath alcohol self-test, and the distance from the start of entering the detection point to stopping is usually not more than 5 meters, the vehicle running state detection sensor 31 is generally located at the front left of the last stopping position (i.e. the detection point) of the vehicle 9, and can detect the distance within 5 meters in front of the vehicle 9 with a detection accuracy of about 1 cm. The running speed of the vehicle 9 (V = ΔS / ΔT) can be calculated according to the relationship between the distance difference (ΔS) and the time interval (ΔT) between the front and rear detection of the vehicle 9 and the vehicle running state detection sensor 31. When the running speed of the vehicle 9 is less than a certain value (for example, less than 40 mm / s), it is judged that the vehicle 9 has stopped running and is in a static state, and it is determined that the driver 10 to be tested has parked the vehicle 9 at a suitable position to wait for the breath alcohol self-test, and a signal is sent to the control unit 2 to start the breath alcohol test operation. The internal logic of the determination is that the driver 10 will judge by himself whether the position of the vehicle 9 after stopping is in front of the alcohol instrument warehouse 8 of the detection point. If not, the driver 10 will not stop the vehicle 9 and will adjust the parking position of the vehicle 9. Therefore, if it is identified and judged that the vehicle 9 has stopped and is in a static state, it can be considered that the driver 10 has parked at a suitable position to wait for the breath alcohol self-test.

[0089] Table 1 is the measurement data of the vehicle running speed detected by using one ultrasonic distance sensor. The total measurement time of the vehicle 9 from the start of entering the detection point to completely stopping is 9 seconds. The ultrasonic distance sensor records the distance about once per second. The average running speed of the vehicle 9 is calculated according to the distance before and after, and it is judged whether the vehicle 9 has stopped according to the average running speed. If the running speed is less than 40 mm / s, it is considered to be stopped. According to the measurement data shown in Table 1, it can be seen that the running speed of the vehicle 9 is between 200-356 mm / s after approaching the detection point, and immediately drops to less than 3 mm / s after starting to stop. Therefore, it is judged that the vehicle 9 has stopped running from the 4th second.

[0090] Table 1, measurement data of the vehicle running speed detected by using one ultrasonic distance sensor

[0091]

[0092]

[0093] Since the front of the vehicle 9 is generally the air inlet shutter, the ultrasonic waves emitted by the ultrasonic distance sensor can be reflected on the shutter grating at one moment and can enter the shutter grating gap at another moment, resulting in the detected distance after parking changing frequently, which can misjudge the stop state of the vehicle 9. Therefore, two ultrasonic distance sensors are used to detect simultaneously, and the two ultrasonic distance sensors are located on the to-be-detected state detection unit 3, and the two ultrasonic distance sensors are arranged close to each other, and each is slightly different in direction towards the vehicle 9 to irradiate different positions in front of the vehicle 9. As long as one of the ultrasonic distance sensors detects that the vehicle 9 has stopped, it is considered that the vehicle 9 has stopped, if both of the ultrasonic distance sensors detect that the vehicle 9 has stopped, it is also considered that the vehicle 9 has stopped, and if neither of the ultrasonic distance sensors detects that the vehicle 9 has stopped, it is considered that the vehicle 9 has not stopped, which can improve the detection success rate and reduce misjudgment.

[0094] Table 2 is the measurement data of the vehicle running speed detected by the two ultrasonic distance sensors. The two ultrasonic distance sensors are respectively referred to as sensor 1 and sensor 2. The running speed measured by the sensor 1 is not stable, and only at the 6th second, the speed is less than 40 mm / s, which can be judged as having stopped, and the speed at other times is greater than 40 mm / s. But the speed of sensor 2 is always less than 40 mm / s after the 4th second, which can be considered to have stopped. Combined with the vehicle running speed detected by the two ultrasonic distance sensors, it can be considered that the sensor 1 may be due to the different detection positions from the sensor 2, the detected distance after stopping is always changing, which can be caused by the uneven surface of the vehicle irradiated by the sensor 1. If two ultrasonic distance sensors are used, and the judgment between them is the logical "or" relationship, as long as one of the sensors judges that the vehicle 9 has stopped, it is considered that the vehicle 9 has finally stopped, which can increase the success rate of judgment.

[0095] Table 2, measurement data of vehicle running speed detected by two ultrasonic distance sensors

[0096]

[0097]

[0098] The vehicle distance detecting unit 4 of the present application detects by a vehicle position sensor, which can be an ultrasonic distance sensor, an infrared distance sensor, a laser distance sensor or the like, and the detecting distance is greater than the maximum distance that the alcohol tester delivery unit 5 can extend and at least 1 meter. The vehicle distance detecting unit 4 detects the distance between the side of the vehicle 9 that the vehicle position sensor has driven through and the vehicle position sensor, so as to know the distance between the alcohol tester 6 on the alcohol tester delivery unit 5 and the side of the vehicle, and then the control unit 2 can know how long the alcohol tester delivery unit 5 needs to extend so as to be convenient for the driver to reach and take down the alcohol tester 6.

[0099] The alcohol tester delivery unit 5 adopts a transmission mechanism that can extend from the alcohol tester storage 8 and retract, and an alcohol tester support is arranged at the end of the transmission mechanism to place the alcohol tester 6, and the alcohol tester 6 placed on the alcohol tester support can be extended and retracted from the alcohol tester storage 8 along with the extension and retraction of the transmission mechanism. In a preferred embodiment of the present application, a magnet is arranged on the alcohol tester support, and a HALL element (a Hall sensor) is arranged on the circuit board in the alcohol tester 6 as a sensor to sense whether the alcohol tester 6 is placed on the alcohol tester support, i.e. if the alcohol tester 6 has been placed back on the alcohol tester support, the HALL element in the alcohol tester 6 can sense the magnetic field generated by the magnet on the alcohol tester support, so as to judge that the alcohol tester 6 has been placed back on the alcohol tester support, and then the alcohol tester 6 sends a homing signal to the control unit 2, and if the magnetic field generated by the magnet on the alcohol tester support is not sensed, it is judged that the alcohol tester 6 has not been placed back on the alcohol tester support. It should be understood by those skilled in the art that the magnet can also be placed in the alcohol tester 6, and the HALL element can be placed on the alcohol tester support to play the same role, and in this case, the homing signal of the alcohol tester 6 should be transmitted to the control unit 2 by the alcohol tester support instead of by the alcohol tester 6. In addition, other similar object proximity detection methods can also be used to detect whether the alcohol tester 6 is homed, and correspondingly, the homing signal of the alcohol tester 6 should be transmitted to the control unit 2 by the corresponding detection unit instead of by the alcohol tester 6. A UV (ultraviolet) disinfection LED lamp electrically connected to the control unit 2 is arranged on the bottom surface of the alcohol tester support corresponding to the alcohol tester 6 air outlet to disinfect the alcohol tester 6.

[0100] The alcohol detector 6 includes an alcohol sensor, a gas pump, and a pressure sensor. When the driver picks up the alcohol detector 6 and blows air into its air inlet, the pressure sensor at the air inlet can sense the blowing action, start the gas pump to draw a certain amount of gas into the alcohol sensor for analysis, and the alcohol detector 6 analyzes the alcohol content in the extracted breath and transmits the test results to the control unit 2. The alcohol sensor can be a fuel cell type alcohol sensor, the gas pump can be a piston type gas pump or a continuous gas pump, and the pressure sensor can be any sensor that can detect the change in pressure when exhaling. As a self-test, the alcohol detector 6 does not require a disposable mouthpiece, and the structure, performance and use method of the alcohol detector 6 are similar to the alcohol detector in the T / GDCKCJH 036-2021 “Pre-service alcohol detector” group standard.

[0101] The alcohol detector 6 can also include a UV disinfection LED lamp at its air inlet to disinfect the air inlet after each breath alcohol test.

[0102] The alcohol detector 6 can also include an obstacle detection sensor on the handle of the alcohol detector 6 facing the driver 10 to be tested, to detect whether there is an obstacle in front of the alcohol detector 6 during the extension of the alcohol detector 6, and to transmit the obstacle detection result to the control unit 2, and the control unit 2 will decide to continue or stop extending the alcohol detector 6 according to the obstacle detection result. The obstacle detection sensor can be an infrared distance sensor or other types of distance sensors with similar functions. Specifically, during the extension of the alcohol detector 6, obstacles may be encountered, for example, the rearview mirror on the side of the driver's window, and the obstacle detection sensor on the handle of the alcohol detector 6 can detect whether there is an obstacle in front of it during the extension. If there is, stop moving forward and retreat, if not, continue moving forward to the set length. The obstacle detection sensor can detect obstacles within 50 cm in front of it, and stop moving forward when the distance between the obstacle and the handle is less than 10 cm.

[0103] The detection result handling unit 7 can use a gate 71 and an alarm device. For example, Figure 1 and Figure 6As shown, the gate 71 is electrically connected with the control unit 2 through the RS485 communication line, is located near the detection point and in front of the vehicle 9 driven by the driver 10 to be detected, has a motor and a controller (not shown) in the gate 71, and has a blocking rod 712 outside. The motor is connected with the blocking rod 712 through a reduction box and can rotate the blocking rod 712 to lift or lower the blocking rod 712. When the alcohol detection result is determined as non-alcohol driving, the control unit 2 controls the gate 71 to lift the blocking rod 712 to release the vehicle 9; when the alcohol detection result is determined as alcohol driving, the control unit 2 controls the blocking rod 712 of the gate 71 to be stationary, and the vehicle 9 cannot pass. The alarm device can be a warning light or a sound box. When the alcohol detection result is determined as non-alcohol driving, the control unit 2 controls the warning light to display a green light to release the vehicle 9, and controls the sound box to broadcast a corresponding prompt at the same time; when the alcohol detection result is determined as alcohol driving, the control unit 2 controls the warning light to display a red light to not release the vehicle 9, and controls the sound box to broadcast a corresponding prompt at the same time.

[0104] The alcohol instrument warehouse 8 is vertically placed on the ground through a stand column, and the position is defined as the detection point of the breath alcohol self-service detection. A plurality of UV disinfection LED lamps electrically connected with the control unit 2 are arranged around the position corresponding to the retracted alcohol detector 6 in the alcohol instrument warehouse 8. When the breath alcohol detection is completed and the alcohol detector 6 is retracted into the alcohol instrument warehouse 8, the plurality of UV disinfection LED lamps on the four walls of the alcohol instrument warehouse 8 are lighted and kept for a certain time, for example, one minute, so as to ensure the hygiene safety in the use process.

[0105] The working process of the breath alcohol self-service detection system is as follows:

[0106] When the vehicle 9 drives to the detection point, the vehicle position sensor of the vehicle distance detection unit 4 detects the approaching of the vehicle 9, the indicator light flashes, the driver 10 sees the flashing indicator light and then slowly parks the vehicle 9 in front of the alcohol instrument storage 8, the vehicle driving state detection sensor 31 of the detection state detection unit 3 detects the driving speed of the vehicle 9, and when the vehicle 9 stops at the driving window just in front of the alcohol instrument storage 8, the vehicle position sensor of the vehicle distance detection unit 4 can detect the distance between the left side of the vehicle 9 and the vehicle position sensor, which determines the length of the transmission mechanism of the alcohol instrument transmission unit 5. The vehicle driving state detection sensor 31 of the detection state detection unit 3 is located in front of the left side of the vehicle 9, can detect the distance between the vehicle 9 and the vehicle driving state detection sensor 31 and calculate the driving speed of the vehicle 9, and when the vehicle driving state detection sensor 31 detects that the driving speed of the vehicle 9 is less than a certain value, it is considered that the vehicle 9 has stopped, and the vehicle driving state detection sensor 31 sends a signal to the control unit 2 to start the self-service breath alcohol detection operation. At this time, the control unit 2 calculates the length of the transmission mechanism extending to the side of the vehicle according to the distance between the vehicle 9 and the vehicle position sensor and controls the transmission mechanism to send the alcohol detection instrument 6 accordingly, for example, when the distance between the left side of the vehicle and the vehicle position sensor is 1 meter, the transmission mechanism extends forward by 80 cm, plus the length of the arm 11 of the driver 10 which is at least 50 cm long, therefore, the driver 10 can easily pick up the alcohol detection instrument 6 placed on the alcohol instrument support of the alcohol instrument transmission unit 5 after opening the window; for another example, when the distance between the left side of the vehicle and the vehicle position sensor is 50 cm, the support extends forward by 20 cm, and the driver 10 can also easily pick up the alcohol detection instrument 6. After the driver 10 picks up the alcohol detection instrument 6, he blows into the blowing port, and the pressure sensor in the alcohol detection instrument 6 can sense the blowing, and after blowing for a certain time (for example, 2 seconds), the air pump draws the exhaled air into the alcohol sensor for analysis to obtain the result of whether there is alcohol and the alcohol content. If there is alcohol in the breath or the alcohol content exceeds a certain value, it is determined that the driver is drunk, and the alcohol detection instrument 6 transmits the detection result to the control unit 2, the control unit 2 controls the horn to broadcast "Please do not drive after drinking" and the red light to flash, and alarms through sound and light, and the control unit 2 controls the blocking rod 712 of the gate 71 not to be lifted to prevent the vehicle 9 from passing. If there is no alcohol or the alcohol content does not exceed a certain value, it is determined that the driver is not drunk, and the alcohol detection instrument 6 transmits the detection result to the control unit 2, the control unit 2 controls the horn to broadcast "Thank you for your cooperation" and the green light to flash, and the control unit 2 controls the blocking rod 712 of the gate 71 to be lifted to allow the vehicle 9 to pass.

[0107] As an alternative embodiment, the to-be-inspected state detection unit 3 can also adopt a face detection positioning method to detect. The face detection positioning method determines whether the driver 10 has stopped at a proper position to wait for the breath alcohol self-service detection by directly judging whether the driver 10 has been positioned in front of the alcohol instrument cabin 8. If yes, the to-be-inspected state detection unit 3 sends a signal to the control unit 2 to start the self-service breath alcohol detection operation.

[0108] The so-called face detection positioning refers to searching a given image by using a certain strategy to determine whether the image contains a face. If yes, the position, size and posture of the face in the image are returned.

[0109] There are many face recognition methods in attendance machines and mobile phones to identify the identity. The basic principle is to identify the identity by using the facial feature points in the face photo. Meanwhile, in order to perform the face identity recognition, it is necessary to first perform the face detection positioning to detect whether the face exists in the image and mark the face coordinate position. Generally, the face is marked by a frame and displayed on the display screen. However, the algorithm is generally used as a pre-processing process of face recognition and is rarely used alone. Moreover, the face detection and positioning are generally performed on the front face. In the present embodiment, the driving window and the alcohol instrument cabin 8 are at a 90-degree angle, which is equivalent to performing the face positioning by using the side face. Moreover, since the driver 10 is located in the driving position, a part of the face can be blocked by the window and the A-pillar or B-pillar after the window is lowered. Therefore, the complete face cannot be displayed during the detection. Therefore, the technical personnel generally do not consider that the to-be-inspected state detection unit 3 adopts the face detection positioning method to detect. However, the inventors have confirmed through actual tests that the face detection positioning method is feasible. Compared with the vehicle driving state detection sensor 31, the face detection positioning method is more direct. If the face of the driver 10 is found in the camera 33 installed at the detection point, it indicates that the driver 10 has parked the vehicle 9 at a proper position. If the vehicle 9 is detected to have stopped by the ultrasonic distance sensor, it cannot directly indicate that the vehicle 9 has been parked at a proper position. It is possible that the vehicle 9 has stopped, but the driver 10 may have parked the vehicle 9 too far forward or too far backward, and the position of the vehicle 9 needs to be adjusted.

[0110] The inventors have conducted actual tests for this purpose.

[0111] Table 3 is the face detection positioning measurement results on a 7-seater Buick business car (SGM6531UBAI), wherein the detection distance refers to the distance between the face and the mobile phone camera 33, which is divided into 1 meter, 1.5 meters and 1.8 meters. The detection angle refers to the angle between the front direction of the face and the optical axis of the mobile phone camera 33, 45 degrees means that the left side of the face looks at the left front of the left window; 90 degrees means that the face looks at the front windshield of the vehicle, that is, the mobile phone camera 33 cannot see the front of the driver's face 10 but only the side of the face. The time is between 7:00 and 8:00 in December. The mobile phone is installed on a tripod, the driver 10 sits in the driver's room, and the window is lowered. First, install the face recognition software SDK (software development kit) of Beijing Kuaishou Technology Co., Ltd. on the mobile phone, and compile the mobile phone APP software to call the face recognition software SDK, but only use the face detection positioning function without using the face recognition function. When the mobile phone APP locates the face, it will prompt on the display screen. When the face just enters the field of view of the camera 33, a special person starts to use a stopwatch to count the time, and stops counting when the face positioning success prompt appears on the display screen. The length of time is the face detection positioning detection time, which is ms. Two drivers (Mr. Qiu and Mr. Tang, male, about 30 years old) wear black fisherman hats on their heads and blue surgical masks as a simulation of face covering. Each case is measured 3 times, and the average value is taken as the detection time. "No" in the table means no face detection positioning.

[0112] Table 3, face detection positioning measurement results on a 7-seater Buick business car

[0113]

[0114]

[0115] Table 4 is the face detection positioning measurement results on a Honda CIVIC DHW7180B car. Compared with the test conditions in Table 3, only two other people (Mr. Liao and Mr. Yuan, male, about 30 years old) are replaced.

[0116] Table 4, face detection positioning measurement results on a Honda CIVIC DHW7180B car

[0117]

[0118]

[0119] From the above test data, it can be known that the detection distance within 1.0 meters can be identified within 3 seconds whether the face is located in front of the camera 33. When there is an obstruction, the detection time will be longer, and the shorter the distance, the faster the detection. The detection time has no obvious relationship with personnel and vehicle type. The detection angle will affect the detection time, and the detection angle of 45 degrees is better than that of 90 degrees. The light is dark at night, which has little effect on the detection result, but when the distance is too far, it may not be detected. In general, if the camera 33 is installed at the detection point, when the vehicle 9 stops at the detection point, if the face of the driver 10 in the field of view can be recognized, it can be considered that the vehicle 9 has stopped in place, and the self-help breath alcohol detection can be started.

[0120] In order to obtain better recognition effect, the camera 33 and the transmission mechanism can be arranged at a certain angle with the driving direction of the vehicle, for example, 45 degrees. When the driver 10 looks at the camera 33, the front direction of the face will be at an angle of 45 degrees with the driving direction of the vehicle. Since the optical axis direction of the camera 33 is also at an angle of 45 degrees with the driving direction of the vehicle, the front direction of the face at this time and the optical axis direction of the camera 33 are at an angle of 0 degrees, which is equivalent to the camera 33 directly facing the front of the face for detection and positioning. In this way, the detection effect is the best, and the shortcoming is that the transmission mechanism needs to run a longer distance when it is extended.

[0121] As an alternative embodiment, the to-be-detected state detection unit 3 can also use a video detection method for detection. The video detection method can judge whether the vehicle 9 is in a stationary state, and further determine whether the driver 10 has parked the vehicle 9 to a suitable position for breath alcohol self-help detection. If so, the control unit 2 is correspondingly signaled to start the breath alcohol detection operation.

[0122] By continuously taking photos of the side of the vehicle 9 driving to the detection point, some photos are taken uninterruptedly during the parking process of the vehicle 9, for example, 10 photos of the side of the vehicle 9 are taken per second, and the similarity of the two photos is compared respectively. If the similarity of the two photos exceeds a certain value (for example, 98%), it is considered that the vehicle 9 is in a stationary state, otherwise it is considered that the vehicle 9 is still in the process of movement. If it is judged that the vehicle 9 is in a stationary state, and the stationary state exceeds a certain time (for example, 1 second), it is determined that the driver 10 has parked to a suitable position for breath alcohol self-help detection. The to-be-detected state detection unit 3 correspondingly signals the control unit 2 to start the breath alcohol detection operation.

[0123] Since the size and shape of vehicles are different, it is possible that other vehicles or personnel pass through the background of the photographed photo, affecting the similarity judgment. Therefore, only a part of the lower half of the photo is extracted for similarity judgment when the photo is analyzed after each time of shooting. Since the vehicle photo reflects the shape of the side of the vehicle, there are features such as vehicle windows, vehicle doors, vehicle body patterns, and vehicle lines in the part of the lower half of the vehicle photo. If the vehicle 9 is moving, the two photos within 0.1 seconds before and after should be obviously different, and the similarity cannot be high. Therefore, it is reasonable and feasible to judge whether the vehicle 9 is stationary by similarity.

[0124] There are many algorithms that can perform similarity analysis, and some commercial software can be used for reference. For example, MATLAB can calculate the similarity of two pictures. Face recognition is also one of the algorithms, but in the present embodiment, the vehicle body photo is compared instead of the face photo. The traditional similarity calculation method judges whether it is similar according to the gray level histogram generated by the image, and the feature point matching algorithm can also be used to obtain better results.

[0125] Based on the above-mentioned self-service breath alcohol detection system, combined with its working process, as shown in Figure 7 The present application also provides a self-service breath alcohol detection method, comprising the following steps:

[0126] Step S1, detecting whether the vehicle 9 driven by the to-be-tested driver 10 is in a state of waiting for self-service breath alcohol detection, and if so, sending a signal to the control unit 2;

[0127] Step S2, the control unit 2 receives the signal that the vehicle 9 driven by the to-be-tested driver 10 is in a state of waiting for self-service breath alcohol detection, and starts the self-service breath alcohol detection operation;

[0128] Step S3, the control unit 2 controls the self-service detection unit 1 to perform the self-service breath alcohol detection operation;

[0129] Step S4, the self-service detection unit 1 performs the self-service breath alcohol detection operation according to the control signal of the control unit 2.

[0130] The step S1 is implemented by the to-be-tested state detection unit 3, which uses a vehicle driving state detection sensor 31 or a camera 33 for detection. The vehicle driving state detection sensor 31 is an ultrasonic distance sensor, an infrared distance sensor, or a laser distance sensor. Preferably, the vehicle driving state detection sensor 31 is a two-way ultrasonic distance sensor.

[0131] The to-be-tested state detection unit 3 uses a face detection positioning method to detect whether the driver 10 has positioned in front of the alcohol instrument cabin 8 for self-service breath alcohol detection.

[0132] The camera 33 of the detection unit 3 can capture the side or front view of the driver 10.

[0133] The camera 33 of the detection unit 3 captures the driver 10's profile within an angle between 45 and 90 degrees between the optical axis of the camera 33 and the face. Preferably, the optical axis of the camera 33 forms a 45-degree angle with the vehicle's direction of travel.

[0134] The detection unit 3 for the state to be tested uses a video detection method to detect whether the vehicle is stationary, and thus determine whether the driver 10 has parked the vehicle 9 in a suitable position to wait for the breath alcohol self-test.

[0135] The camera 33 continuously captures photos of the side of the vehicle as it approaches the detection point, for example, taking 10 photos per second. The similarity between two photos is compared. If the similarity between two photos exceeds a predetermined value, the vehicle 9 is considered to be stationary; otherwise, the vehicle 9 is considered to be in motion. If the vehicle 9 is determined to be stationary and this stationary state exceeds a predetermined time, it is determined that the driver 10 has stopped at a suitable position to await the breath alcohol self-test. The detection unit 3 then sends a signal to the control unit 2 to initiate the breath alcohol test.

[0136] Because vehicles vary in size and shape, other vehicles or people may pass by in the background of the photos, affecting the similarity judgment. Therefore, when analyzing each photo, only a portion of the lower half of the photo is extracted for similarity judgment. The lower half of the vehicle photo contains features such as windows, doors, body patterns, and vehicle lines. If vehicle 9 is moving, there should be obvious differences between the two photos taken within 0.1 seconds, and the similarity cannot be very high. Therefore, it is reasonable and feasible to determine whether vehicle 9 is stationary by using similarity.

[0137] like Figure 8 As shown, step S4 includes the following steps:

[0138] Step S41: The vehicle distance detection unit 4 detects the distance between the vehicle distance detection unit 4 and the side of the vehicle 9 driven by the driver to be tested 10, and sends the distance detection result to the control unit 2;

[0139] Step S42: Control unit 2 controls alcohol meter delivery unit 5 to send alcohol detector 6 out of alcohol meter compartment 8, and controls the distance at which alcohol meter delivery unit 5 sends out alcohol detector 6 based on the distance between vehicle distance detection unit 4 and the side of vehicle 9 driven by the driver to be tested 10 provided by vehicle distance detection unit 4.

[0140] Step S43, after the driver 10 to be tested picks up the alcohol detector 6 from the alcohol detector transmission unit 5 to perform the breath alcohol test, the alcohol detector 6 performs the breath alcohol test and sends the breath alcohol test result to the control unit 2;

[0141] Step S44, the control unit 2 sends the disposal instruction to the test result disposal unit 7 according to the breath alcohol test result of the alcohol detector 6;

[0142] Step S45, the test result disposal unit 7 performs the corresponding operation according to the disposal instruction of the control unit 2;

[0143] Step S46, after the driver 10 to be tested returns the alcohol detector 6, the alcohol detector 6 detects that the alcohol detector 6 is returned to the original position and sends the return signal to the control unit 2;

[0144] Step S47, the control unit 2 controls the alcohol detector transmission unit 5 to retract the alcohol detector 6 to the alcohol detector storage 8;

[0145] The step S4 can further include: Step S48, turning on the UV disinfection LED lamp in the alcohol detector storage 8 to disinfect the alcohol detector 6 for the next use.

[0146] The step S1 further includes: if the vehicle 9 driven by the driver 10 to be tested is not in the state of waiting for the self-service breath alcohol test, then after a preset time is exceeded, the step S41 is entered. That is to say, if the vehicle distance detection unit 4 first detects that the vehicle 9 approaches and the indicator light flashes, and then the vehicle state detection unit 3 does not detect that the vehicle 9 is in the state of waiting for the self-service breath alcohol test due to some reasons, according to the original rule, there will be no subsequent steps and thus the driver 10 to be tested cannot perform the self-service breath alcohol test. In order to prevent this situation, as long as the vehicle distance detection unit 4 detects that the vehicle 9 approaches, even if the vehicle state detection unit 3 detects that the vehicle 9 is not in the state of waiting for the self-service breath alcohol test, as long as a preset time (for example, 10 seconds) is exceeded, the subsequent steps will be performed, so that the driver 10 to be tested performs the self-service breath alcohol test, as a detection timeout processing, and avoids that the driver 10 to be tested is always waiting.

[0147] In summary, the breath alcohol self-service detection system and method provided by the application are used for the self-service breath alcohol test of the driver of the vehicle, are simple to operate, convenient to use, and can be widely applied.

[0148] The above description is only the preferred embodiment of the present application, and for the ordinary skilled in the art, various changes and modifications can be made according to the technical scheme and technical concept of the present application, and all these changes and modifications shall belong to the protection scope of the claims of the present application.

Claims

1. A breath alcohol self-test system, characterized by, The application discloses a self-help breath alcohol detection device for a driver (10) of a vehicle (9), which comprises a self-help detection unit (1), a control unit (2) electrically connected with the self-help detection unit (1), and a detection state detection unit (3) electrically connected with the control unit (2), wherein the self-help detection unit (1) comprises an alcohol detector (6). The detection state detection unit (3) is used for detecting whether the vehicle (9) driven by the driver (10) is in a state of waiting for self-help breath alcohol detection, and if so, sending a signal to the control unit (2) to start the self-help breath alcohol detection operation. The control unit (2) is used for controlling the self-help detection unit (1) to perform the self-help breath alcohol detection operation according to the starting signal of the self-help breath alcohol detection provided by the detection state detection unit (3). The self-help detection unit (1) is used for performing the self-help breath alcohol detection operation according to the control signal of the control unit (2). The detection state detection unit (3) is detected by a vehicle driving state detection sensor (31), which is an ultrasonic distance sensor, an infrared distance sensor or a laser distance sensor. Alternatively, the detection state detection unit (3) is detected by a camera (33). The self-help detection unit (1) further comprises a vehicle distance detection unit (4) electrically connected with the control unit (2), an alcohol detector conveying unit (5) electrically connected with the control unit (2), a detection result disposal unit (7) electrically connected with the control unit (2), and an alcohol detector storage (8), wherein the alcohol detector (6) is placed on the alcohol detector conveying unit (5). The alcohol detector storage (8) is used for accommodating the alcohol detector (6) when the breath alcohol detection operation is not started, and protecting the alcohol detector (6), and a position where the alcohol detector storage (8) is located is defined as a detection point of the self-help breath alcohol detection. The vehicle distance detection unit (4) is used for detecting a distance between the vehicle distance detection unit (4) and a side of the vehicle (9) driven by the driver (10), and sending the distance detection result to the control unit (2) for the control unit (2) to calculate a distance at which the alcohol detector conveying unit (5) sends the alcohol detector (6) to the side of the vehicle (9). The alcohol detector conveying unit (5) is used for sending the alcohol detector (6) from the alcohol detector storage (8) to a suitable position according to the instruction of the control unit (2) so that the driver (10) picks up the alcohol detector (6) to perform the breath alcohol detection, and retracting the alcohol detector (6) to the alcohol detector storage (8) according to the instruction of the control unit (2). The alcohol detector (6) is used for the driver (10) to perform the self-help breath alcohol detection, and sends the breath alcohol detection result to the control unit (2), and sends a homing signal to the control unit (2) after the alcohol detector (6) is homed. The detection result disposal unit (7) is used for performing corresponding operations according to the disposal instruction of the control unit (2). The control unit (2) is used to control the alcohol tester conveying unit (5) to send out the alcohol tester (6) from the alcohol tester storage (8) to the direction of the driver (10) to be tested according to the start signal of the breath alcohol self-test provided by the state detection unit (3), and control the distance of the alcohol tester (6) sent out by the alcohol tester conveying unit (5) according to the distance between the vehicle distance detection unit (4) and the side of the vehicle (9) driven by the driver (10) to be tested provided by the vehicle distance detection unit (4); The control unit (2) is also used to control the alcohol tester conveying unit (5) to retract the alcohol tester (6) to the alcohol tester storage (8) according to the homing signal sent by the alcohol tester (6) after obtaining the breath alcohol test result. The control unit (2) is also used to send the corresponding disposal instruction to the test result disposal unit (7) according to the breath alcohol test result of the alcohol tester (6).

2. The breath alcohol self-detection system according to claim 1, wherein When the state detection unit (3) uses the vehicle driving state detection sensor (31) for detection, the vehicle driving state detection sensor (31) is one or two ultrasonic distance sensors.

3. The breath alcohol self-detection system according to claim 1, wherein When the state detection unit (3) uses the camera (33) for detection, the state detection unit (3) uses the face detection positioning method for detection, which can directly determine whether the driver (10) has been positioned in front of the detection point of the breath alcohol self-test for breath alcohol self-test.

4. The breath alcohol self-detection system according to claim 3, wherein The camera (33) of the state detection unit (3) can take the side face or the front face of the driver (10).

5. The breath alcohol self-checking system according to claim 4, wherein The range of the camera (33) of the state detection unit (3) taking the side face of the driver (10) is that the included angle of the camera (33) relative to the face is between 45 degrees and 90 degrees.

6. The breath alcohol self-checking system according to claim 4, wherein The camera (33) is at an angle of 45 degrees with the driving direction of the vehicle.

7. The breath alcohol self-checking system according to claim 1, wherein When the state detection unit (3) uses the camera (33) for detection, the state detection unit (3) uses the video detection method for detection, which can determine whether the vehicle (9) is in a stationary state, and further determine whether the driver (10) has parked the vehicle (9) to a suitable position for breath alcohol self-test.

8. The breath alcohol self-checking system according to claim 7, wherein The camera (33) continuously takes the photos of the side of the vehicle driving to the detection point of the breath alcohol self-test, and respectively compares the similarity of the front and rear two photos. If the similarity of the two photos exceeds a predetermined value, it is considered that the vehicle (9) is in a stationary state, otherwise it is considered that the vehicle (9) is still in the process of movement. If it is judged that the vehicle (9) is in a stationary state, and the stationary state exceeds a predetermined time, it is determined that the driver (10) has parked the vehicle (9) to a suitable position for breath alcohol self-test. The state detection unit (3) sends a signal to the control unit (2) to start the breath alcohol self-test operation.

9. The breath alcohol self-checking system according to claim 8, wherein, The photos taken each time are only extracted from the lower part of the photos for similarity judgment when analyzed.

10. The breath alcohol self-detection system according to claim 1, wherein The vehicle distance detection unit (4) detects by a vehicle position sensor, which is an ultrasonic distance sensor, an infrared distance sensor or a laser distance sensor; The alcohol instrument transmission unit (5) is provided with a transmission mechanism, which can extend and retract from the alcohol instrument storage (8), and an alcohol instrument support is arranged at the extended end to place the alcohol detector (6); The alcohol instrument storage (8) is provided with UV disinfection LED lamps around the position corresponding to the retracted alcohol detector (6) and electrically connected with the control unit (2), when the alcohol detector (6) is retracted into the alcohol instrument storage (8) after the completion of the breath alcohol detection, the UV disinfection LED lamps on the four walls of the alcohol instrument storage (8) will be lit and kept for a certain time to disinfect the alcohol detector (6); The alcohol detector (6) comprises an obstacle detection sensor arranged on the handle thereof and facing the driver (10) to be detected, which is used to detect whether there is an obstacle in front of the alcohol instrument transmission unit (5) during the extension process, and transmit the obstacle detection result to the control unit (2), and the control unit (2) will decide whether to continue or stop transmitting the alcohol detector (6) according to the obstacle detection result; The detection result processing unit (7) comprises a gate (71) electrically connected with the control unit (2) and located near the detection point and in front of the vehicle (9) driven by the driver (10) to be detected, the gate (71) is provided with a motor and a controller inside and a blocking rod (712) outside, the motor is connected with the blocking rod (712) through a reduction box and can rotate the blocking rod (712) to lift or lower the blocking rod (712); when the alcohol detection result is determined as non-drunk driving, the control unit (2) controls the gate (71) to lift the blocking rod (712) to release the vehicle (9); when the alcohol detection result is determined as drunk driving, the control unit (2) controls the blocking rod (712) of the gate (71) to be stationary, and the vehicle (9) cannot pass through; The detection result processing unit (7) further comprises an alarm device, which is a warning light, a sound box or a combination thereof, when the alcohol detection result is determined as non-drunk driving, the control unit (2) controls the warning light to display a green light to release the vehicle (9), or controls the sound box to broadcast a prompt for releasing the vehicle (9), or both; when the alcohol detection result is determined as drunk driving, the control unit (2) controls the warning light to display a red light to not release the vehicle (9), or controls the sound box to broadcast a prompt for not releasing the vehicle (9), or both.

11. A method of breath alcohol self-testing, comprising: The method comprises the following steps: Step S1, detecting whether the vehicle (9) driven by the driver (10) to be detected is in a state of waiting for self-help detection of breath alcohol, if yes, sending a signal to the control unit (2); Step S2, the control unit (2) receives the signal that the vehicle (9) driven by the driver (10) to be detected is in a state of waiting for self-help detection of breath alcohol, and starts the breath alcohol self-help detection operation; Step S3, the control unit (2) controls the self-help detection unit (1) to perform the breath alcohol self-help detection operation; Step S4, the self-help detection unit (1) performs the breath alcohol self-help detection operation according to the control signal of the control unit (2); The step S1 is implemented by the to-be-detected state detection unit (3), which detects by using a vehicle driving state detection sensor (31) or a camera (33), wherein the vehicle driving state detection sensor (31) is an ultrasonic distance sensor, an infrared distance sensor or a laser distance sensor; The step S4 includes the following steps: Step S41, the vehicle distance detection unit (4) detects the distance between the vehicle distance detection unit (4) and the side of the vehicle (9) driven by the to-be-detected driver (10), and sends the distance detection result to the control unit (2); Step S42, the control unit (2) controls the alcohol instrument conveying unit (5) to send out the alcohol detector (6) from the alcohol instrument storage (8), and controls the distance of sending out the alcohol detector (6) according to the distance between the vehicle distance detection unit (4) and the side of the vehicle (9) driven by the to-be-detected driver (10) provided by the vehicle distance detection unit (4); Step S43, after the to-be-detected driver (10) picks up the alcohol detector (6) from the alcohol instrument conveying unit (5) to perform breath alcohol detection, the alcohol detector (6) performs breath alcohol detection and sends the breath alcohol detection result to the control unit (2); Step S44, the control unit (2) sends an instruction to the detection result disposal unit (7) according to the breath alcohol detection result of the alcohol detector (6); Step S45, the detection result disposal unit (7) performs corresponding operation according to the disposal instruction of the control unit (2); Step S46, after the to-be-detected driver (10) returns the alcohol detector (6), the alcohol detector (6) detects that the alcohol detector (6) is homed, and sends a homing signal to the control unit (2); Step S47, the control unit (2) controls the alcohol instrument conveying unit (5) to retract the alcohol detector (6) to the alcohol instrument storage (8).

12. The breath alcohol self-detection method according to claim 11, wherein, When the to-be-detected state detection unit (3) detects by using the vehicle driving state detection sensor (31), the vehicle driving state detection sensor (31) is one or two ultrasonic distance sensors.

13. The breath alcohol self-test method of claim 11, wherein, When the to-be-detected state detection unit (3) detects by using the camera (33), the to-be-detected state detection unit (3) detects by using a face detection positioning method, which can directly judge whether the driver (10) has been located in front of the detection point of the breath alcohol self-help detection to perform the breath alcohol self-help detection.

14. The breath alcohol self-test method of claim 13, wherein, The camera (33) of the to-be-detected state detection unit (3) can take the side face or the front face of the driver (10).

15. The breath alcohol self-test method of claim 14, wherein, The range of the camera (33) of the to-be-detected state detection unit (3) taking the side face of the driver (10) is that the included angle of the camera (33) relative to the face is between 45 degrees and 90 degrees.

16. The breath alcohol self-administered test method of claim 14 wherein, The camera (33) is at an angle of 45 degrees with the driving direction of the vehicle.

17. The breath alcohol self-administered test method according to claim 11, wherein, When the to-be-tested state detection unit (3) uses the camera (33) to detect, the to-be-tested state detection unit (3) uses a video detection method to detect, the video detection method can judge whether the vehicle is in a stationary state, and further determine whether the driver (10) has parked the vehicle (9) to a suitable position for the breath alcohol self-service detection.

18. The breath alcohol self-administered test method according to claim 17, wherein, The camera (33) continuously takes photos of the side of the vehicle driving to the detection point, and the similarity of the two photos is compared respectively, if the similarity of the two photos exceeds a predetermined value, it is considered that the vehicle (9) is in a stationary state, otherwise it is considered that the vehicle (9) is still in the process of moving; if it is judged that the vehicle (9) is in a stationary state, and the stationary state exceeds a predetermined time, it is determined that the driver (10) has parked to a suitable position for the breath alcohol self-service detection, the to-be-tested state detection unit (3) sends a signal to the control unit (2) to start the breath alcohol detection operation.

19. The breath alcohol self-administered test method of claim 18 wherein, The photos after each shooting are only extracted from the lower part of the photos for similarity judgment when analyzed.

20. The breath alcohol self-administered test method according to claim 11, wherein, The step S4 further comprises a step S48, turning on the UV disinfection LED lamp in the alcohol instrument warehouse (8) to disinfect the alcohol detection instrument (6) for the next use.

21. The breath alcohol self-administered test method according to claim 11, wherein, The step S1 further comprises a step S0, the vehicle distance detection unit (4) detects that a vehicle (9) is approaching, and the indicator light flashes.

22. The breath alcohol self-administered test method of claim 21 wherein, The step S1 further comprises: if the vehicle (9) driven by the to-be-tested driver (10) is not in the state of waiting for the breath alcohol self-service detection, it enters the step S41 after exceeding a preset time.

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