CN112895895A - Drunk driving prevention device and method - Google Patents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K28/00—Safety devices for propulsion-unit control, specially adapted for, or arranged in, vehicles, e.g. preventing fuel supply or ignition in the event of potentially dangerous conditions
- B60K28/02—Safety devices for propulsion-unit control, specially adapted for, or arranged in, vehicles, e.g. preventing fuel supply or ignition in the event of potentially dangerous conditions responsive to conditions relating to the driver
- B60K28/06—Safety devices for propulsion-unit control, specially adapted for, or arranged in, vehicles, e.g. preventing fuel supply or ignition in the event of potentially dangerous conditions responsive to conditions relating to the driver responsive to incapacity of driver
- B60K28/063—Safety devices for propulsion-unit control, specially adapted for, or arranged in, vehicles, e.g. preventing fuel supply or ignition in the event of potentially dangerous conditions responsive to conditions relating to the driver responsive to incapacity of driver preventing starting of vehicles
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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Abstract
The invention discloses a device for preventing drunk driving, which comprises: the device comprises a signal acquisition assembly, a near-infrared alcohol detector, a signal analysis assembly and a vehicle limiting assembly. The invention also discloses a method for preventing drunk driving, which comprises the following steps: the method comprises a signal acquisition step, an alcohol concentration detection step, a signal analysis step and a vehicle limitation step. According to the drunk driving prevention device and the drunk driving prevention method, on one hand, the near-infrared alcohol detector is adopted to accurately measure the alcohol concentration in the human body, the measurement accuracy is high, on the other hand, the condition near the driver seat is obtained through the sensor and the camera, whether the driver tests himself or herself is judged through image analysis, and the situation of replacing cheating can be effectively prevented.
Description
Technical Field
The invention relates to a driving safety technology, in particular to a technology for preventing drunk driving.
Background
Accident investigations by the world health organization in 2008 have shown that approximately 50% to 60% of traffic accidents are associated with drunk driving, which has been classified as a leading cause of death from car accidents. In china, traffic accidents caused by drunk driving are tens of thousands of times per year; more than 50% of the accidents causing death are related to drunk driving, and the harm of drunk driving is striking and has become the first big killer of traffic accidents. From 5 months and 1 day in 2011, China begins to execute new regulations of heavy punishment of drunk driving: whether the consequence of traffic accidents is caused or not, if the drunk driving behavior is crime, the crime is penalized by being restricted for less than 6 months.
The means for fighting drunk driving is not strict, but the phenomenon of drunk driving is often prohibited. The reason is that the existing monitoring mode is mainly manual monitoring, traffic policemen intercept the vehicle by setting a card, and an alcohol detector is adopted to detect the alcohol content in the driver body, so that whether the driver drives drunk or not is judged. The monitoring mode needs to consume a large amount of police force, is easy to cause traffic jam, cannot be used as a conventional monitoring means, and causes low monitoring efficiency on drunk driving behaviors. Many people always think that the people do not happen to the traffic police so happily due to the lucky psychology, and the drunk driving phenomenon is caused frequently.
In order to fundamentally prevent the occurrence of drunk driving, the effective method is that the alcohol detection can be carried out on the driver before the driver starts the vehicle, when the alcohol in the driver exceeds the standard, the drunk driving prevention system forbids the start or the driving of the vehicle, and the design of the vehicle ensures that the vehicle cannot be driven after drunk.
In the prior art, the drunk driving prevention system has the following designs:
chinese patent application CN109878330A, published as 2019.03.11, entitled intelligent drunk driving prevention control system, the detection method of the system is: facial features are extracted through the camera to prevent cheating, the alcohol content is detected through the alcohol detector, the engine is controlled to be started through the alcohol signal switch, and drunk driving behaviors are reminded through the buzzer. The system has the disadvantages that firstly, the core component of the air blowing type alcohol detector is a fuel cell, so that the cost is high and the popularization is difficult; secondly, the monitoring process is complicated, active air blowing is needed, the waiting time is long, and the user experience is greatly influenced; thirdly, the anti-cheating method can only ensure the consistency of the driver in the driving process, and can not prevent other passengers who do not drink wine from blowing air to pass through the detection, so that the anti-cheating cannot be truly prevented.
Chinese patent application CN108973679A, published as 2018.08.01, entitled anti-cheating anti-drunk driving device, the detection method of the device is: carry out alcohol detection to the driver through the alcohol test sensor who sets up on the steering wheel, set up fingerprint detection appearance on vehicle start key and be used for taking notes vehicle starter fingerprint, set up fingerprint verification appearance on vehicle steering wheel handle and be used for verifying vehicle driver's fingerprint, guarantee that driver and vehicle are the same people when starting to realize anti-purpose of practising fraud. However, the device has the following problems that firstly, the sampling of the used alcohol sensor is easily influenced by airflow, the accuracy is not high, misjudgment is easy to occur, secondly, the driving habits of everyone are different, and a fingerprint verification instrument cannot be arranged at one position on a steering wheel, so that fingers are always pressed in the area in the driving process, and the anti-cheating effect is lost.
Chinese patent application CN109532485A, published as 2019.01.09, entitled intelligent drunk driving prevention device and drunk driving prevention method, the detection method of the device is: the 5 alcohol sensors are respectively installed in the steering wheel, a co-driver instrument panel, a primary driver seat backrest, a co-driver seat backrest and the center of the rear portion of an automobile ceiling, the alcohol concentration in the automobile is detected, the WiFi module is communicated with the main control chip, if the alcohol concentration in the primary driver is detected to exceed a threshold value, the driver is judged to be drunk, an automobile oil way is disconnected through a relay, and the automobile cannot be started. The device and the detection method have two problems, one is that the influence of air flow can affect the air flow in the automobile no matter the automobile window is opened or the air conditioner in the automobile is opened in the driving process, and the air exhaled by a driver can not enter the sensor; and secondly, the influence of the gas exhaled by other drunk passengers in the vehicle can cause misjudgment, and the problems that the driver does not drink the wine, the passengers drink the wine and the vehicle cannot be started appear.
Chinese patent application CN109552043A, published as 2019.04.02, entitled automobile drunk driving prevention device and drunk driving prevention method using near-infrared alcohol detection, the detection method of the device is: when the car door is unlocked by using a car key, the whole alcohol detection system starts to be started; the laser emitter emits a beam of laser, the laser irradiates the fixed mirror through the beam splitter and then reflects the laser to the beam splitter, then irradiates the movable mirror, reflects the laser from the movable mirror to the detection port, irradiates capillary vessels of hands of a person through the detection port, generates diffuse reflection, and receives the diffuse reflection light by the diffuse reflection sensor; the detection signal is transmitted to the spectrum detector from the diffuse reflection sensor through the optical fiber, and after the analysis of the spectrum detector, an instruction is sent to the interferometer controller to finely adjust the position of the moving mirror; after the movable mirror is finely adjusted, the optical path transmission is carried out again, the operation is repeated for a plurality of times, a plurality of groups of data are measured, and the data are transmitted to the vehicle-mounted computer through the data line; and the vehicle-mounted computer processes and analyzes the data after receiving the data to obtain whether the alcohol content in the blood of the driver exceeds the standard, and if the alcohol content in the blood exceeds the standard, the vehicle-mounted computer sends an instruction to the engine to prohibit starting. However, the near infrared light alcohol detection technology needs to collect enough data by pressing a detection instrument with a finger to analyze the alcohol concentration in the blood of skin capillaries, and in the scheme, the sensor is not in direct contact with the skin, so that an accurate detection result cannot be obtained. In addition, the device cannot prevent cheating, for example, a driver who has not drunk alcohol starts the device by detection and then hands over the device to drive.
In summary, the existing feasible detection methods for drunk driving are mainly classified into the following three types:
using an alcohol detector to detect the alcohol concentration in exhaled air requires the driver to actively blow against the alcohol detector. The main problem is that the user experience is poor, and each time the vehicle is started, the operation of extra exhalation is needed. In addition, the anti-cheating ability is poor. The drunk driving locking system has almost no anti-cheating capability, and can not avoid the situation that other passengers replace a driver to test the alcohol content.
Using one or more alcohol sensors, the alcohol concentration in the exhaled breath is detected without the driver having to actively blow. The main problem that exists is misjudgment, and the gas exhaled by personnel in the vehicle is greatly influenced by the airflow, and the airflow changes no matter windows are opened or the air conditioner is opened, so that the gas exhaled by the driver cannot be correctly collected by the alcohol sensor. There may be a case where the driver cannot correctly detect the alcohol even if the driver drinks. In addition, the driver does not drink alcohol, but the passenger drinks alcohol, the concentration detected by the alcohol sensor exceeds the standard, and the vehicle is not allowed to start.
The near-infrared alcohol detector is used for measuring the alcohol concentration in capillary vessels in the skin contacting with the detector, and the method is high in speed and high in precision. The main problem is poor anti-cheating ability, and it is necessary to prevent other passengers from performing alcohol tests instead of drivers by effective means.
Disclosure of Invention
The invention discloses a technology for preventing drunk driving, which can prevent a vehicle from starting when a driver has a risk of over-standard alcohol concentration.
According to an embodiment of the present invention, there is provided an apparatus for preventing drunk driving, including: the device comprises a signal acquisition assembly, a near-infrared alcohol detector, a signal analysis assembly and a vehicle limiting assembly. The signal acquisition assembly acquires pressure signals and image signals of a main driving position and a peripheral area of the main driving position. The near-infrared alcohol detector is in contact with the skin of a tested person, and the alcohol concentration in the tested person is measured according to the reflected light of the skin. The signal analysis assembly judges whether the tested person is a driver or not according to the pressure signal and the image signal acquired by the signal acquisition assembly. The signal analysis component judges whether the detected person is a driver or not, the alcohol concentration in the detected person detected by the near-infrared alcohol detector meets the standard, the vehicle limiting component allows the vehicle to be started, the signal analysis component judges whether the detected person is the driver or not, or the alcohol concentration in the detected person detected by the near-infrared alcohol detector does not meet the standard, and the vehicle limiting component prevents the vehicle from being started.
In one embodiment, the signal acquisition assembly comprises: pressure sensor and camera. The pressure sensor is arranged on the main driving seat and detects a pressure signal of the main driving seat. The camera is arranged on the roof and acquires image signals of a main driving position and a peripheral area of the main driving position, wherein the peripheral area of the main driving position at least comprises a range taking the main driving position seat as the center and taking the arm length as the diameter and an area where the starting device is located.
In one embodiment, the signal analysis component comprises: the device comprises a main driving position image recognition device and a hand image recognition device. The main driving position image recognition device extracts a main driving position image from the image signal, recognizes the human body skeleton signal from the main driving position image, and determines the number of human body coordinates in a main driving position area by taking neck coordinates in the human body skeleton signal as the human body coordinates. The hand image recognition device extracts a hand image from the image signal, the hand image is overlapped with the area where the starting device is located, the hand image recognition device recognizes the hand contour from the hand image, and the number of the hand contours in the area where the starting device is located is determined.
In one embodiment, a vehicle restraint assembly includes: the system comprises a starting condition judging component, a starting tracking component and an instruction component. The starting condition judging component judges that the main driving position is occupied and the person and a detected person of the near-infrared alcohol detector are the same person, the alcohol concentration in the person meets the standard, the starting condition is met, and a starting instruction is sent out, otherwise, the starting condition is not met, and a warning instruction is sent out. After the vehicle is started, the main driving position personnel always leave the main driving position, the tracking assembly is started to maintain the starting state, and after the vehicle is started, the main driving position personnel leave the main driving position, the tracking assembly is started to send a speed limiting instruction. The instruction component sends an instruction to a component of the vehicle, the starting condition judging component sends a starting instruction, the instruction component starts the engine, the starting condition judging component sends a warning instruction, the instruction component instructs the instrument panel to send a warning signal, the tracking component is started to send a speed limiting instruction, and the instruction component limits the speed of the vehicle.
In one embodiment, the following conditions are simultaneously satisfied: the pressure signal of the main driving position detected by the pressure sensor accords with a person signal, the main driving position image recognition device determines that the number of human body coordinates in a main driving position area is one, the hand image recognition device determines that the number of hand outlines in an area where the starting device is located is one, the alcohol concentration in the tested person body detected by the near-infrared alcohol detector accords with a standard, the starting condition is met, and the starting condition judgment component sends a starting instruction. Any one of the conditions is not met, the starting condition is not met, and the starting condition judgment component sends out an alarm instruction.
In one embodiment, the start tracking component issues a speed limit command, the engine remains started but the vehicle is restricted in place, and the dashboard issues a prompt signal to prompt re-detection by the near infrared alcohol detector. The following conditions are simultaneously satisfied: the pressure signal of the main driving position detected by the pressure sensor accords with a one-person signal, the main driving position image recognition device determines that the number of human body coordinates in a main driving position area is one, the hand image recognition device determines that the number of hand outlines in an area where the starting device is located is one, the alcohol concentration in the tested person body detected by the near-infrared alcohol detector accords with a standard, the starting condition is met, and the tracking assembly is started to release speed limitation. And if any one of the conditions is not met, the starting condition is not met, and the tracking component is started to maintain the speed limit.
In one embodiment, the primary rider perimeter area includes a front row center armrest, a secondary rider, a dashboard, and a center console. The hand image recognition device firstly uses skin color extraction to determine the area of the hand so as to extract the hand image, and then uses boundary recognition to recognize the hand outline from the hand image.
According to an embodiment of the present invention, a method for preventing drunk driving is provided, which includes the following steps:
a signal acquisition step, which is to acquire a main driving position and pressure signals and image signals of a peripheral area of the main driving position;
an alcohol concentration detection step, namely, contacting the skin of the person to be detected by using a near-infrared alcohol detector, and measuring the alcohol concentration in the body of the person to be detected according to the reflected light of the skin;
a signal analysis step, which judges whether the tested person is a driver or not according to the collected pressure signal and the image signal;
and a vehicle limiting step, namely judging that the detected person is a driver and the alcohol concentration in the detected person detected by the near-infrared alcohol detector meets the standard, allowing the vehicle to start, judging that the detected person is not the driver or the alcohol concentration in the detected person detected by the near-infrared alcohol detector does not meet the standard, and preventing the vehicle from starting.
In one embodiment, in the signal acquisition step:
detecting a pressure signal of a main driving seat by using a pressure sensor arranged on the main driving seat;
the method comprises the steps of acquiring image signals of a main driving position and a peripheral area of the main driving position by using a camera arranged on a car roof, wherein the peripheral area of the main driving position at least comprises a range which takes a main driving position seat as a center and takes the arm length as the diameter and an area where a starting device is located.
In one embodiment, the signal analyzing step comprises:
a main driving position image identification step, namely extracting a main driving position image from the image signal, identifying a human body skeleton signal from the main driving position image, and determining the number of human body coordinates in a main driving position area by taking neck coordinates in the human body skeleton signal as human body coordinates;
and a hand image recognition step of extracting a hand image from the image signal, overlapping the hand image with the area where the starting device is located, recognizing a hand contour from the hand image, and determining the number of the hand contours in the area where the starting device is located.
In one embodiment, the vehicle restraining step comprises:
a starting condition judging step, namely judging that a person is in a main driving position and the person and a detected person of the near-infrared alcohol detector are the same person, and sending a starting instruction if the alcohol concentration in the person meets the standard and the starting condition is met, or sending a warning instruction if the starting condition is not met;
starting tracking, namely, after the vehicle is started, the main driving position personnel always leave the main driving position and maintain the starting state, and after the vehicle is started, the main driving position personnel leave the main driving position and send a speed limit instruction;
and a vehicle control step, namely sending an instruction to a component of the vehicle, starting the engine according to the starting instruction, indicating an instrument panel to send out a warning signal according to the warning instruction, and limiting the speed of the vehicle according to the speed limiting instruction.
In one embodiment, the following conditions are simultaneously satisfied: the method comprises the following steps that a pressure signal of a main driving position detected by a pressure sensor accords with a one-person signal, the number of human body coordinates in a main driving position area is determined to be one, the number of hand outlines in an area where a starting device is located is determined to be one, the alcohol concentration in a detected person body detected by a near-infrared alcohol detector accords with a standard, a starting condition is met, and a starting instruction is sent out;
if any one of the conditions is not met, the starting condition is not met, and a warning instruction is sent out.
In one embodiment, after the speed limit instruction is sent out, the engine is kept started but the vehicle is limited in place, and the instrument panel sends out a prompt signal to prompt the near infrared alcohol detector to detect again;
the following conditions are simultaneously satisfied: the pressure signal of the main driving position detected by the pressure sensor accords with a one-person signal, the number of human body coordinates in the main driving position area is determined to be one, the number of hand outlines in the area where the starting device is located is determined to be one, the alcohol concentration in the detected person body detected by the near-infrared alcohol detector accords with a standard, the starting condition is met, and the speed limit is relieved;
any one of the above conditions is not satisfied, the starting condition is not satisfied, and the speed limit is maintained.
According to the drunk driving prevention device and the drunk driving prevention method, on one hand, the near-infrared alcohol detector is adopted to accurately measure the alcohol concentration in the human body, the measurement accuracy is high, on the other hand, the condition near the driver seat is obtained through the sensor and the camera, whether the driver tests himself or herself is judged through image analysis, and the situation of replacing cheating can be effectively prevented.
Drawings
Fig. 1 discloses a block diagram of a drunk driving prevention apparatus according to an embodiment of the present invention.
Fig. 2 discloses a flow chart of a method of preventing drunk driving according to an embodiment of the invention.
Fig. 3 discloses a flow chart of an implementation of a method for preventing drunk driving according to an embodiment of the invention.
Fig. 4 discloses an implementation flow of a specific anti-cheating means in the drunk driving prevention method according to an embodiment of the invention.
Detailed Description
The invention provides a drunk driving prevention device, and fig. 1 discloses a structural block diagram of the drunk driving prevention device according to an embodiment of the invention. Referring to fig. 1, the drunk driving prevention apparatus includes: a signal acquisition component 101, a near infrared alcohol detector 102, a signal analysis component 103, and a vehicle restraint component 104.
The signal acquisition assembly 101 acquires pressure signals and image signals of a main driving position and a peripheral area of the main driving position. In one embodiment, the signal acquisition assembly 101 includes: a pressure sensor 111 and a camera 112. The pressure sensor 111 is disposed on the main-seat, and the pressure sensor 111 detects a pressure signal of the main-seat. The camera 112 is disposed on the roof, and the camera 112 acquires image signals of the main driving position and the area around the main driving position. The peripheral area of the main driving position at least comprises a range which takes the main driving position seat as the center and the arm length as the diameter and an area where the starting device is located. In one embodiment, the primary rider perimeter area includes a front row center armrest, a secondary rider, a dashboard, and a center console. The peripheral area of the main driving position is defined as a front-row central armrest, a secondary driving position, an instrument panel and a central console, so that more image information in a passenger compartment can be obtained through a camera, and more accurate data can be provided for the anti-cheating function. With the popularization of one-key starting, the current mainstream vehicle models are basically provided with a one-key starting function, so that the starting device is a one-key starting button. Because the near-infrared alcohol detector needs to be in close proximity to the skin of a human body to detect, the near-infrared alcohol detector may be integrated into a one-key start button.
The near-infrared alcohol detector 102 is in contact with the skin of the person to be measured, and measures the alcohol concentration in the body of the person to be measured based on the reflected light from the skin. In one embodiment, the NIR alcohol detector 102 is integrated into a one-touch button, and the beam of IR radiation generated by the NIR alcohol detector is transmitted through an optical fiber to a touch pad of the one-touch button to illuminate the skin of a finger pressing against the touch pad, where the near IR alcohol detector absorbs more light in a particular wavelength band than normal when alcohol is present in the subject. Therefore, the concentration of alcohol in the body can be measured by irradiating the body with infrared rays, collecting reflected light rays with a touch panel, and depending on the degree to which the body reflects infrared rays. The invention discloses a near infrared alcohol detector, which is widely used at present, and the basic principle of the near infrared alcohol detector is not described in detail.
The signal analysis component 103 judges whether the person to be tested is a driver according to the pressure signal and the image signal acquired by the signal acquisition component 101. The signal analysis component 103 primarily performs anti-cheating functions. In one embodiment, the signal analysis component 103 includes: a main driving position image recognition device 131 and a hand image recognition device 132. The main driving position image recognition device 131 extracts a main driving position image from the image signal, recognizes a human body skeleton signal from the main driving position image, and determines the number of human body coordinates in the main driving position region by using neck coordinates in the human body skeleton signal as human body coordinates. The main driving position image recognition device 131 performs region division on the image acquired by the camera, extracts the main driving position image from the whole image, recognizes a human body skeleton from the main driving position image through an image processing algorithm, and takes the neck coordinates of the human body skeleton as the human body coordinates. And determining the number of the human body coordinates in the main driving area, wherein the standard number is one human body coordinate. If two or more human body coordinates exist in the main driving area, the cheating suspicion is considered to exist, and the alcohol detection is invalid. If the main driving area has one and only one human body coordinate, the identity of the main driving area is considered as the driver. The hand image recognition device 132 extracts a hand image from the image signal, the hand image overlaps with the region where the activation device is located, and the hand image recognition device 312 recognizes the hand contour from the hand image, and determines the number of hand contours in the region where the activation device is located. The hand image recognition device 132 locates the hand coordinates from the human skeleton, and takes the end of the arm skeleton as the center point to acquire an image within a certain range around the end as a hand image. Since the operation of the hand is to press the one-key start button as generally understood, the hand image may be determined with reference to the position of the start device, i.e., the one-key start button. After the hand image is determined, an area, for example, a 50 × 50 pixel area, is defined, and the skin color is extracted through an image processing algorithm to obtain a hand contour. In one embodiment, the hand image recognition device first extracts a hand image by determining the region where the hand is located using skin tone extraction, and then recognizes the hand contour from the hand image using boundary recognition. If two or more hand contours are communicated with the graph of the starting device, the suspected cheating exists, and the alcohol detection is invalid. If one and only one hand contour is communicated with the image of the starting device and the hand contour is from the driver, the detection is judged to be carried out by the driver, and the detection result is valid.
The vehicle restraint assembly 104 is coupled to vehicle components, primarily to the vehicle's engine and powertrain, to control whether the vehicle is started or whether the vehicle is speed limited. The signal analysis component 103 determines that the person under test is a driver and the alcohol concentration in the person under test detected by the near infrared alcohol detector 102 meets a criterion, and the vehicle restriction component 104 allows the vehicle to start. The signal analysis component 103 determines that the person under test is not a driver or that the alcohol concentration in the person under test detected by the near infrared alcohol detector 102 does not meet a criterion, and the vehicle restriction component 104 prevents the vehicle from being started. In one embodiment, the vehicle restraint assembly 104 includes: a start condition determining component 141, a start tracking component 142 and an instruction component 143. The starting condition judging component 141 judges that the main driving position is occupied and the person and the detected person of the near-infrared alcohol detector are the same person, and simultaneously the alcohol concentration in the person meets the standard, the starting condition is met, and a starting instruction is sent, otherwise, the starting condition is not met, and a warning instruction is sent. In one embodiment, the following conditions are simultaneously satisfied: the pressure signal of the main driving position detected by the pressure sensor accords with a person signal, the main driving position image recognition device determines that the number of human body coordinates in the main driving position area is one, the hand image recognition device determines that the number of hand outlines in the area where the starting device is located is one, and the alcohol concentration in the detected person body detected by the near-infrared alcohol detector accords with the standard: the concentration is below the threshold value of 20mg/100 ml. The start condition is satisfied and the start condition judgment component 141 issues a start instruction. If any of the above conditions is not satisfied, and the start condition is not satisfied, the start condition determining component 141 issues a warning instruction. The starting tracking component 142 continuously tracks the state of the main driving position personnel after the vehicle is started, the starting state is maintained if the main driving position personnel do not leave the main driving position all the time after the vehicle is started, and the speed limiting instruction is sent out by the starting tracking component 142 if the main driving position personnel leave the main driving position after the vehicle is started. After the vehicle is started, the driver leaves the main driving position, and other people can replace the vehicle to start, and the driver can be replaced after the vehicle is started, so that the possibility of cheating exists. As one of the anti-cheating measures, after the start tracking component 142 sends out a speed limit command, the engine is kept started but the vehicle is limited in place, i.e., the vehicle is limited in speed by 0. The instrument panel sends out a prompt signal to prompt that the detection is carried out again by the near-infrared alcohol detector. When the detection is carried out again, the following conditions are simultaneously met: the pressure signal of the main driving position detected by the pressure sensor accords with a one-person signal, the main driving position image recognition device determines that the number of human body coordinates in a main driving position area is one, the hand image recognition device determines that the number of hand outlines in an area where the starting device is located is one, the alcohol concentration in the detected person body detected by the near-infrared alcohol detector accords with a standard, the starting condition is met, the tracking assembly is started to remove the speed limit, and the vehicle can normally run. If any one of the conditions is not met, the starting condition is not met, the tracking assembly is started to maintain the speed limit, and the vehicle is not allowed to move. The command component 143 sends commands to components of the vehicle, primarily to the engine and dashboard of the vehicle. The starting condition judging component 141 sends a starting instruction, the instruction component 143 starts the engine, the starting condition judging component 141 sends a warning instruction, the instruction component 143 instructs the instrument panel to send a warning signal, the starting tracking component 142 sends a speed limiting instruction, and the instruction component 143 limits the speed of the vehicle and prompts the vehicle on the instrument panel to detect again.
The invention also provides a drunk driving prevention method, and fig. 2 discloses a flow chart of the drunk driving prevention method according to an embodiment of the invention. Referring to fig. 2, the method for preventing drunk driving includes the following steps:
and S1, signal acquisition. In the signal acquisition step, pressure signals and image signals of a main driving position and a peripheral area of the main driving position are acquired. In one embodiment, in the signal acquisition step, a pressure sensor arranged on a main driving seat is used for detecting a pressure signal of the main driving seat, a camera arranged on the roof is used for acquiring image signals of the main driving seat and a peripheral area of the main driving seat, and the peripheral area of the main driving seat at least comprises a range taking the main driving seat as a center and taking the arm length as a diameter and an area where the starting device is located. In one embodiment, the primary rider perimeter area includes a front row center armrest, a secondary rider, a dashboard, and a center console. The signal acquisition step S1 performs a function corresponding to the signal acquisition assembly 101 described previously.
And S2, detecting the alcohol concentration. In the alcohol concentration detection step, a near-infrared alcohol detector is used to be in contact with the skin of the person to be detected, and the alcohol concentration in the body of the person to be detected is measured according to the reflected light of the skin. The alcohol concentration detecting step is performed by a near infrared alcohol detector, in one embodiment, the near infrared alcohol detector is integrated into a one-key start button, infrared radiation beams generated by the near infrared alcohol detector can be conducted onto a touch pad of the one-key start button through an optical fiber, the skin of a finger pressing the touch pad is irradiated, and when alcohol is contained in the body of the subject, more light is absorbed in a specific wave band than in a normal state. Therefore, the concentration of alcohol in the body can be measured by irradiating the body with infrared rays, collecting reflected light rays with a touch panel, and depending on the degree to which the body reflects infrared rays.
And S3, signal analysis. And in the signal analysis step, whether the tested person is a driver is judged according to the acquired pressure signal and the acquired image signal. The signal analysis step S3 performs a function corresponding to the signal analysis component 103 described above. In one embodiment, the signal analyzing step comprises:
and S31, a main driving position image recognition step, wherein the main driving position image recognition step extracts a main driving position image from the image signal, recognizes a human body skeleton signal from the main driving position image, and determines the number of human body coordinates in a main driving position area by taking the neck coordinates in the human body skeleton signal as the human body coordinates. The function executed in the master driving position image recognition step S31 corresponds to the master driving position image recognition device 131 described above.
And S32, a hand image recognition step, wherein the hand image recognition step extracts a hand image from the image signal, the hand image is overlapped with the area where the starting device is located, the hand contour is recognized from the hand image, and the number of the hand contours in the area where the starting device is located is determined. The hand image recognition step S32 corresponds to the hand image recognition device 132 described above.
And S4, vehicle limiting step. And in the vehicle limiting step, judging that the detected person is a driver and the alcohol concentration in the detected person detected by the near-infrared alcohol detector meets the standard, allowing the vehicle to start, judging that the detected person is not the driver or the alcohol concentration in the detected person detected by the near-infrared alcohol detector does not meet the standard, and preventing the vehicle from starting. The function performed in the vehicle restriction step S4 corresponds to the vehicle restriction component 104 described above.
In one embodiment, the vehicle limiting step S4 includes:
and S41, a starting condition judging step, namely judging that the main driving position is occupied and the person and a detected person of the near-infrared alcohol detector are the same person, and if the alcohol concentration in the person meets the standard, sending a starting instruction if the starting condition is met, otherwise, sending a warning instruction if the starting condition is not met. In the activation condition determination step S41, the following conditions are simultaneously satisfied: the pressure signal of the main driving position detected by the pressure sensor accords with a human signal, the number of human body coordinates in the main driving position area is determined to be one, the number of hand outlines in the area where the starting device is located is determined to be one, the alcohol concentration in the tested person body detected by the near-infrared alcohol detector accords with a standard, the starting condition is met, and a starting instruction is sent. If any one of the conditions is not met, the starting condition is not met, and a warning instruction is sent out. The function performed by the activation condition determination step S41 corresponds to the activation condition determination component 141 described above.
And S42, starting a tracking step. After the vehicle is started, the main driving position personnel always leave the main driving position, the starting state is maintained, and after the vehicle is started, the main driving position personnel leave the main driving position, and then a speed limiting instruction is sent out. After the speed limit instruction is sent out, the engine is kept started but the vehicle is limited in place, and the instrument panel sends out a prompt signal to prompt that the detection is carried out again by the near-infrared alcohol detector. The following conditions are simultaneously satisfied: the pressure signal of the main driving position detected by the pressure sensor accords with a one-person signal, the number of human body coordinates in the main driving position area is determined to be one, the number of hand outlines in the area where the starting device is located is determined to be one, the alcohol concentration in the detected person body detected by the near-infrared alcohol detector accords with a standard, the starting condition is met, and the speed limit is relieved. Any one of the above conditions is not satisfied, the starting condition is not satisfied, and the speed limit is maintained. The function performed by the start tracking step S42 corresponds to the start tracking component 142 described previously.
And S43, vehicle control. And sending an instruction to a component of the vehicle, starting the engine according to the starting instruction, indicating an instrument panel to send out a warning signal according to the warning instruction, and limiting the speed of the vehicle according to the speed limiting instruction. When a starting instruction is sent, the engine is started, and when a warning instruction is sent, the instrument panel is indicated to send a warning signal. And when a speed limit instruction is sent out, the speed of the vehicle is limited and the vehicle is prompted on an instrument panel to detect again.
Fig. 3 discloses a flow chart of an implementation of a method for preventing drunk driving according to an embodiment of the invention. Referring to fig. 3, the specific execution flow sequentially executes the following steps:
the seat pressure sensor provides a pressure signal.
And (4) judging: is the controller determining whether the driver is seated or not based on the received signal? If the main driver has no person, the signal is continuously waited, and if the main driver has no person, the next step is carried out.
The near-infrared alcohol detector is started, and the camera is started.
Pressing a key start switch, triggering the near-infrared alcohol detector to detect alcohol concentration, and triggering the camera to take pictures.
And (4) judging: is alcohol concentration below the allowed start threshold? Is the driver himself detected?
If any one of the alcohol concentration detection and the driver personal detection is not passed, the controller sends a signal to disallow the starting. The meter indicates "failed alcohol test". Even if the person is not detected, the person is collectively indicated as "failed alcohol detection".
Through the alcohol detection, the controller signals to allow the engine to start.
Is the seat pressure sensor detect that the driver is out of the seat?
And if the vehicle is still static, limiting the vehicle speed to be 0, detecting that the main driver sits down again through the seat pressure sensor, and restarting the alcohol testing process.
If the alcohol test is passed again, the vehicle speed limit is removed, normal driving is allowed, and if the alcohol test is not passed, the engine is shut down.
Fig. 4 discloses an implementation flow of a specific anti-cheating means in the drunk driving prevention method according to an embodiment of the invention. As shown in fig. 4, the specific execution flow sequentially executes the following steps:
the controller extracts the human skeleton in the picture shot by the camera through an image processing algorithm, and takes the neck coordinate as the human coordinate.
Calculating the number of human body coordinates in the main driving area, wherein if the number is more than or equal to 2, the detection is invalid; if the human body coordinate exists, the human body coordinate is judged as the human body coordinate of the driver.
The hand coordinates of the driver are obtained from the human body skeleton of the driver, the coordinates are used as a central point, images in the peripheral range are obtained, skin color extraction is carried out, and the hand outline is obtained.
Calculating the number of hand contours communicated with the starting switch image, wherein if the number is more than or equal to 2, the detection is invalid; if only one hand contour is available and the hand contour is from the driver, the detection is judged to be performed by the driver, and the detection result is valid.
According to the drunk driving prevention device and the drunk driving prevention method, on one hand, the near-infrared alcohol detector is adopted to accurately measure the alcohol concentration in the human body, the measurement accuracy is high, on the other hand, the condition near the driver seat is obtained through the sensor and the camera, whether the driver tests himself or herself is judged through image analysis, and the situation of replacing cheating can be effectively prevented.
It should also be noted that the above-mentioned embodiments are only specific embodiments of the present invention. It is apparent that the present invention is not limited to the above embodiments and similar changes or modifications can be easily made by those skilled in the art from the disclosure of the present invention and shall fall within the scope of the present invention. The embodiments described above are provided to enable persons skilled in the art to make or use the invention and that modifications or variations can be made to the embodiments described above by persons skilled in the art without departing from the inventive concept of the present invention, so that the scope of protection of the present invention is not limited by the embodiments described above but should be accorded the widest scope consistent with the innovative features set forth in the claims.
Claims (13)
1. An apparatus for preventing drunk driving, comprising:
the signal acquisition assembly acquires pressure signals and image signals of the main driving position and the area around the main driving position;
the near-infrared alcohol detector is in contact with the skin of the person to be detected, and measures the alcohol concentration in the body of the person to be detected according to the reflected light of the skin;
the signal analysis component judges whether the tested person is a driver or not according to the pressure signal and the image signal acquired by the signal acquisition component;
the vehicle limiting assembly judges that the detected person is a driver, the alcohol concentration in the detected person detected by the near-infrared alcohol detector meets the standard, the vehicle limiting assembly allows the vehicle to be started, the signal analyzing assembly judges that the detected person is not the driver or the alcohol concentration in the detected person detected by the near-infrared alcohol detector does not meet the standard, and the vehicle limiting assembly prevents the vehicle from being started.
2. The drunk driving prevention apparatus of claim 1, wherein the signal acquisition assembly includes:
the pressure sensor is arranged on the main driving seat and detects a pressure signal of the main driving seat;
the camera is arranged on the roof and used for acquiring image signals of a main driving position and a main driving position peripheral area, and the main driving position peripheral area at least comprises a range taking a main driving position seat as a center and taking the arm length as the diameter and an area where the starting device is located.
3. The drunk driving prevention apparatus of claim 2, wherein the signal analysis assembly includes:
the main driving position image recognition device extracts a main driving position image from the image signal, recognizes a human body skeleton signal from the main driving position image, and determines the number of human body coordinates in a main driving position area by taking neck coordinates in the human body skeleton signal as the human body coordinates;
the hand image recognition device extracts a hand image from the image signal, the hand image is overlapped with the area where the starting device is located, the hand image recognition device recognizes the hand contour from the hand image, and the number of the hand contours in the area where the starting device is located is determined.
4. The drunk driving deterrent apparatus of claim 3, wherein said vehicle restraint assembly comprises:
the starting condition judging component is used for judging that a person is in a main driving position and the person and a detected person of the near-infrared alcohol detector are the same person, and meanwhile, the alcohol concentration in the person meets the standard, the starting condition is met, and a starting instruction is sent out, otherwise, the starting condition is not met, and a warning instruction is sent out;
starting a tracking assembly, wherein after the vehicle is started, a main driving position person does not leave the main driving position all the time, a starting state is maintained, and after the vehicle is started, the main driving position person leaves the main driving position, the tracking assembly is started to send a speed limit instruction;
the instruction component sends an instruction to a part of the vehicle, the starting condition judging component sends a starting instruction, the instruction component starts the engine, the starting condition judging component sends a warning instruction, the instruction component instructs the instrument panel to send a warning signal, the tracking component is started to send a speed limiting instruction, and the instruction component limits the speed of the vehicle.
5. The drunk driving prevention apparatus as set forth in claim 4,
the following conditions are simultaneously satisfied: the pressure signal of the main driving position detected by the pressure sensor accords with a one-person signal, the main driving position image recognition device determines that the number of human body coordinates in a main driving position area is one, the hand image recognition device determines that the number of hand outlines in an area where the starting device is located is one, the alcohol concentration in the tested person body detected by the near-infrared alcohol detector accords with a standard, the starting condition is met, and the starting condition judgment component sends a starting instruction;
any one of the conditions is not met, the starting condition is not met, and the starting condition judgment component sends out an alarm instruction.
6. The drunk driving prevention device as defined in claim 5, wherein the start tracking module issues a speed limit command, the engine is kept started but the vehicle is limited in place, and the dashboard issues a prompt signal to prompt the re-detection by the near-infrared alcohol detector;
the following conditions are simultaneously satisfied: the pressure signal of the main driving position detected by the pressure sensor accords with a one-person signal, the main driving position image recognition device determines that the number of human body coordinates in a main driving position area is one, the hand image recognition device determines that the number of hand outlines in an area where the starting device is located is one, the alcohol concentration in the detected person body detected by the near-infrared alcohol detector accords with a standard, the starting condition is met, and the tracking assembly is started to relieve speed limit;
and if any one of the conditions is not met, the starting condition is not met, and the tracking component is started to maintain the speed limit.
7. The drunk driving prevention apparatus as set forth in claim 3,
the peripheral area of the main driving position comprises a front row central armrest, an auxiliary driving position, an instrument panel and a center console;
the hand image recognition device firstly uses skin color extraction to determine the area where the hand is located so as to extract a hand image, and then uses boundary recognition to recognize the hand outline from the hand image.
8. A method of preventing drunk driving, comprising:
a signal acquisition step, which is to acquire a main driving position and pressure signals and image signals of a peripheral area of the main driving position;
an alcohol concentration detection step, namely, contacting the skin of the person to be detected by using a near-infrared alcohol detector, and measuring the alcohol concentration in the body of the person to be detected according to the reflected light of the skin;
a signal analysis step, which judges whether the tested person is a driver or not according to the collected pressure signal and the image signal;
and a vehicle limiting step, namely judging that the detected person is a driver and the alcohol concentration in the detected person detected by the near-infrared alcohol detector meets the standard, allowing the vehicle to start, judging that the detected person is not the driver or the alcohol concentration in the detected person detected by the near-infrared alcohol detector does not meet the standard, and preventing the vehicle from starting.
9. The method for preventing drunk driving as set forth in claim 8, wherein in said signal acquisition step:
detecting a pressure signal of a main driving seat by using a pressure sensor arranged on the main driving seat;
the method comprises the steps of acquiring image signals of a main driving position and a main driving position peripheral area by using a camera arranged on a car roof, wherein the main driving position peripheral area at least comprises a range taking a main driving position seat as a center and taking the arm length as the diameter and an area where a starting device is located.
10. The method of preventing drunk driving as defined in claim 9, wherein said signal analysis step includes:
a main driving position image identification step, namely extracting a main driving position image from the image signal, identifying a human body skeleton signal from the main driving position image, and determining the number of human body coordinates in a main driving position area by taking neck coordinates in the human body skeleton signal as human body coordinates;
and a hand image recognition step of extracting a hand image from the image signal, overlapping the hand image with the area where the starting device is located, recognizing a hand contour from the hand image, and determining the number of the hand contours in the area where the starting device is located.
11. The method of deterring drunk driving as set forth in claim 10, wherein said vehicle restraining step includes:
a starting condition judging step, namely judging that a person is in a main driving position and the person and a detected person of the near-infrared alcohol detector are the same person, and sending a starting instruction if the alcohol concentration in the person meets the standard and the starting condition is met, or sending a warning instruction if the starting condition is not met;
starting tracking, namely, after the vehicle is started, the main driving position personnel always leave the main driving position and maintain the starting state, and after the vehicle is started, the main driving position personnel leave the main driving position and send a speed limit instruction;
and a vehicle control step, namely sending an instruction to a component of the vehicle, starting the engine according to the starting instruction, indicating an instrument panel to send out a warning signal according to the warning instruction, and limiting the speed of the vehicle according to the speed limiting instruction.
12. The method of deterring drunk driving of claim 11,
the following conditions are simultaneously satisfied: the method comprises the following steps that a pressure signal of a main driving position detected by a pressure sensor accords with a one-person signal, the number of human body coordinates in a main driving position area is determined to be one, the number of hand outlines in an area where a starting device is located is determined to be one, the alcohol concentration in a detected person body detected by a near-infrared alcohol detector accords with a standard, a starting condition is met, and a starting instruction is sent out;
and if any one of the conditions is not met, the starting condition is not met, and a warning instruction is sent out.
13. The method for preventing drunk driving as defined in claim 12, wherein after the speed limit instruction is issued, the engine is kept started but the vehicle is restricted in place, and the instrument panel issues a prompt signal to prompt the detection by the near-infrared alcohol detector again;
the following conditions are simultaneously satisfied: the pressure signal of the main driving position detected by the pressure sensor accords with a one-person signal, the number of human body coordinates in the main driving position area is determined to be one, the number of hand outlines in the area where the starting device is located is determined to be one, the alcohol concentration in the detected person body detected by the near-infrared alcohol detector accords with a standard, the starting condition is met, and the speed limit is relieved;
any one of the conditions is not satisfied, the starting condition is not satisfied, and the speed limit is maintained.
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