Vehicle safety inspection system and safety inspection method

Abstract

A vehicle safety inspection system and a safety inspection method are provided. The vehicle safety inspection system includes a scanning device installed in an inspection area to scan a vehicle under inspection, an imaging device to obtain a real image of a side of the vehicle driving into the inspection area, a recognition module adapted to recognize the real image and determine a predetermined portion and a rear end of the vehicle according to the recognized real image, a calculation module to calculate a length of a trunk of the vehicle according to the determined predetermined portion and the rear end, a position sensor to detect a real-time position of the vehicle in the inspection area, and a controller adapted to control the scanning device to perform a scanning inspection on the trunk if a front end of the trunk enters a scanning area of the scanning device according to the length of the trunk and the real-time position. The scanning device only emits a radiation beam during the inspection of the trunk, ensuring that the driver and other passengers on the vehicle are not exposed to the radiation beam.

Description

Technical Field

[0001] Embodiments of this disclosure relate to a vehicle security inspection system, and more particularly to a vehicle security inspection system suitable for inspecting the trunk of a vehicle, and a security inspection method for inspecting a vehicle using the vehicle security inspection system. Background Technology

[0002] Currently, more and more people are choosing to travel by private car. While traditional public transportation typically involves security checks on luggage, the difficulty of implementing such checks on private cars means that not every vehicle is thoroughly inspected, posing a significant security risk. In particular, the inspection of non-passenger areas (such as the front and rear trunks, which are not visible from the outside) for prohibited items like drugs, smuggled goods, controlled knives, firearms, and flammable or explosive materials is receiving increasing attention when cars enter locations such as public security bureaus, judicial offices, prisons, customs, border control stations, anti-smuggling and anti-drug operations, airports, important government agencies, key security institutions, military bases, consulates, entrances to residences of important figures, and important conference venues.

[0003] Current methods of vehicle security checks include manual inspection, which is inefficient and makes it difficult to detect concealed contraband. The reliability of using sniffer dogs or scent extraction devices for the removal of explosive devices and some explosives is also low.

[0004] A small vehicle security inspection system has been developed. The vehicle stops, the accompanying personnel get out, and then an X-ray device moves the car from front to back for inspection and imaging. However, this inspection method relies on manual operation of the X-ray inspection device, with the human eye subjectively judging whether the vehicle contains prohibited items. This introduces human error, resulting in low efficiency and the possibility of missed detections. At toll stations or intersections with high traffic volume, long queues are easily formed, significantly reducing traffic flow. Summary of the Invention

[0005] The purpose of this disclosure is to address at least one aspect of the aforementioned problems and defects existing in the prior art.

[0006] According to one embodiment of this disclosure, a vehicle security inspection system is provided, comprising: a scanning device installed in an inspection area, adapted to scan a vehicle to be inspected; an imaging device adapted to acquire a physical image of the side of a vehicle entering the inspection area; an identification module adapted to identify the physical image and determine a predetermined part and a rear end of the vehicle based on the identified physical image; a calculation module adapted to calculate the length of the vehicle's trunk based on the determined predetermined part and rear end; a position sensor adapted to detect the real-time position of the vehicle in the inspection area; and a controller adapted to control the scanning device to scan and inspect the trunk when it is determined, based on the length of the trunk and the real-time position, that the front end of the vehicle's trunk has entered the scanning area of ​​the scanning device.

[0007] According to one embodiment of the present disclosure, the controller is further adapted to control the scanning device to stop scanning inspection when it is determined, based on the real-time position, that the rear end of the vehicle has left the scanning area of ​​the scanning device.

[0008] According to one embodiment of this disclosure, the vehicle safety inspection system further includes a composite module, which is adapted to composite multiple sub-images of the vehicle at different locations in the inspection area acquired by the imaging device to obtain the physical image.

[0009] According to one embodiment of this disclosure, the predetermined portion includes at least two of the following: the rear wheel, the rear door, the rear door handle, and the rear edge of the roof.

[0010] According to one embodiment of this disclosure, the identification module determines the approximate outline of the trunk based on the predetermined location and the rear end of the vehicle, and the calculation module determines the length of the trunk based on the approximate outline.

[0011] According to one embodiment of this disclosure, the calculation module obtains the length of the trunk by multiplying the distance between any one of the front edge of the rear wheel, the rear edge of the rear wheel, the rear edge of the rear door, the rear end of the rear door handle, and the rear edge of the roof and the rear end of the vehicle by their respective correction coefficients.

[0012] According to one embodiment of this disclosure, the position sensor includes a laser sensor.

[0013] According to one embodiment of this disclosure, the laser sensor determines the real-time position of the vehicle in the inspection area by scanning the front or rear end of the vehicle.

[0014] According to one embodiment of this disclosure, the vehicle safety inspection system further includes an auxiliary sensor, and the imaging device begins operation based on the state in which the auxiliary sensor is triggered.

[0015] According to one embodiment of this disclosure, one of the imaging device and the position sensor is further adapted to measure the driving speed of the vehicle, and the controller controls the scanning frequency of the scanning device according to the driving speed.

[0016] According to one embodiment of this disclosure, one of the imaging device and the position sensor is further adapted to measure the driving speed of the vehicle, and the controller controls the scanning image formed by the scanning device to be scaled according to the driving speed.

[0017] According to one embodiment of the present disclosure, the scanning device includes: two upright frames disposed opposite to each other on both sides of the inspection area; and a radiation source and an array detector respectively disposed on the two upright frames.

[0018] According to one embodiment of this disclosure, the scanning device further includes two shielding walls, respectively disposed on the upright frame, to shield radiation from the radiation source.

[0019] According to another embodiment of this disclosure, a method for inspecting a vehicle using the above-described vehicle security inspection system is provided, comprising the following steps:

[0020] Acquire a physical image of the side of the vehicle entering the inspection area;

[0021] Identify the physical image and determine the predetermined parts and rear end of the vehicle based on the identified physical image;

[0022] The length of the vehicle's trunk is calculated based on the determined predetermined location and rear end.

[0023] Detect the real-time position of the vehicle in the inspection area; and

[0024] When the front end of the vehicle's trunk enters the scanning area of ​​the scanning device based on the length and real-time position of the trunk, the scanning device is controlled to scan and inspect the trunk.

[0025] According to one embodiment of this disclosure, when it is determined from the real-time position that the rear end of the vehicle has left the scanning area of ​​the scanning device, the scanning device is controlled to stop scanning and inspecting.

[0026] According to one embodiment of this disclosure, the step of acquiring a physical image of the side of a vehicle entering the inspection area includes: combining multiple sub-physical images of the vehicle at different positions in the inspection area acquired by the imaging device to obtain the physical image.

[0027] According to one embodiment of this disclosure, the predetermined portion includes at least two of the following: the rear wheel, the rear door, the rear door handle, and the rear edge of the roof.

[0028] According to one embodiment of this disclosure, the general outline of the trunk is determined based on the predetermined location and the rear end of the vehicle, and the length of the trunk is determined based on the general outline.

[0029] According to one embodiment of this disclosure, the length of the trunk is obtained by multiplying the distance between any one of the front edge of the rear wheel, the rear edge of the rear wheel, the rear edge of the rear door, the rear end of the rear door handle, and the rear edge of the roof and the rear end of the vehicle by their respective correction factors. Attached Figure Description

[0030] Figure 1 A schematic diagram of a vehicle security inspection system according to an exemplary embodiment of the present disclosure is shown.

[0031] Figure 2 A perspective view of a scanning device of a vehicle security inspection system according to an exemplary embodiment of the present disclosure is shown;

[0032] Figure 3 A three-dimensional schematic diagram of a vehicle to be inspected is shown;

[0033] Figure 4 A schematic diagram illustrating the principle of a vehicle security inspection system according to another exemplary embodiment of this disclosure is shown; and

[0034] Figure 5 A block diagram of a security inspection method according to an exemplary embodiment of the present disclosure is shown. Detailed Implementation

[0035] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this disclosure or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0036] In the following detailed description, numerous specific details are set forth for ease of explanation to provide a thorough understanding of the embodiments disclosed herein. However, it will be apparent that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and apparatuses are illustrated to simplify the drawings. Techniques, methods, and apparatuses known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and apparatuses should be considered part of the specification.

[0037] In the description of this disclosure, it should be understood that directional terms such as "front, rear, up, down, left, right", "lateral, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship, which are generally based on the orientation or positional relationship shown in the accompanying drawings and are based on the direction of travel of the vehicle. They are used only for the convenience of describing this disclosure and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this disclosure. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0038] In the description of this disclosure, it should be understood that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this disclosure.

[0039] According to a general inventive concept of this disclosure, a vehicle security inspection system is provided, comprising: a scanning device installed in an inspection area, adapted to scan a vehicle to be inspected; an imaging device adapted to acquire a physical image of the side of a vehicle entering the inspection area; an identification module adapted to identify the physical image and determine a predetermined part and a rear end of the vehicle based on the identified physical image; a calculation module adapted to calculate the length of the vehicle's trunk based on the determined predetermined part and rear end; a position sensor adapted to detect the real-time position of the vehicle in the inspection area; and a controller adapted to control the scanning device to scan and inspect the trunk when it is determined, based on the length of the trunk and the real-time position, that the front end of the vehicle's trunk has entered the scanning area of ​​the scanning device.

[0040] According to another general inventive concept of this disclosure, a method for inspecting the trunk of a vehicle using the aforementioned vehicle security inspection system is provided, comprising the following steps: acquiring a physical image of the side of a vehicle entering an inspection area; identifying the physical image and determining a predetermined part and rear end of the vehicle based on the identified physical image; calculating the length of the trunk of the vehicle based on the determined predetermined part and rear end; detecting the real-time position of the vehicle in the inspection area; and, when it is determined based on the length of the trunk and the real-time position that the front end of the trunk of the vehicle enters the scanning area of ​​the scanning device, controlling the scanning device to scan and inspect the trunk.

[0041] Figure 1 A schematic diagram of a vehicle security inspection system according to an exemplary embodiment of the present disclosure is shown. Figure 2 A perspective view of a scanning device of a vehicle security inspection system according to an exemplary embodiment of the present disclosure is shown; Figure 3 A three-dimensional schematic diagram of a vehicle to be inspected is shown.

[0042] The vehicle security inspection system according to embodiments of this disclosure is suitable for quickly and securely inspecting the trunk of vehicles such as family cars. Through this inspection, it is possible to detect whether prohibited items such as drugs, explosives, controlled knives, or firearms are present in the vehicle's trunk. See also... Figure 3 The vehicle 100 includes a front end 101, a rear end 102, a front wheel 103, a rear wheel 104, a trunk 105, a rear door 107, a rear door handle 108, and a roof 109, with a front end 106 in the trunk 105.

[0043] According to an exemplary embodiment of this disclosure, such as Figure 1-3 As shown, a vehicle safety inspection system is provided, comprising: a scanning device 1 installed in an inspection area 200 and adapted to scan a vehicle to be inspected; an imaging device 2 adapted to acquire a physical image of the side of a vehicle 100 entering the inspection area 200; an identification module adapted to identify the physical image and determine a predetermined part and a rear end 102 of the vehicle 100 based on the identified physical image; a calculation module adapted to calculate the length of the trunk 105 of the vehicle 100 based on the determined predetermined part and rear end 102; a position sensor 3 adapted to detect the real-time position of the vehicle 100 in the inspection area 200; and a controller adapted to control the scanning device 1 to scan and inspect the trunk 105 when the front end 106 of the trunk 105 of the vehicle 100 enters the scanning area 16 of the scanning device 1 based on the length L3 of the trunk 105 and the real-time position.

[0044] According to the vehicle security inspection system of this disclosure, when the controller determines that the front end 106 of the trunk 105 of the vehicle 100 has entered the scanning area 16 of the scanning device based on the length L3 of the trunk 105 calculated by the calculation module and the real-time position of the vehicle 100 measured by the position sensor 3, the controller controls the scanning device 1 to scan and inspect the trunk 105. In this way, the scanning device 1 only performs a security inspection on the trunk 105 of the vehicle 100, and the driver and passengers of the vehicle 100 do not need to get out of the vehicle, and the vehicle does not need to stop moving, thus achieving the vehicle scanning and inspection.

[0045] According to an exemplary embodiment of this disclosure, such as Figure 1-3 As shown, the controller is further adapted to control the scanning device 1 to stop scanning and inspection when it is determined, based on the real-time position of the vehicle 100, that the rear end 102 of the vehicle 100 has left the scanning area 16 of the scanning device 1, in order to prepare for the next security inspection operation.

[0046] In one exemplary embodiment, the imaging device 2 forms a physical image of the side of the vehicle 100 based on a video stream. The imaging device 2 includes an area scan camera, a region laser scanner, a multi-line laser sensor, or a line scan camera. The vehicle safety inspection system also includes a compositing module, which is adapted to combine multiple sub-physical images of the vehicle 100 acquired by the imaging device 2 at different locations in the inspection area 200 to obtain the physical image. Since the multiple sub-physical images of the side of the vehicle 100 acquired by the imaging device 2 may have local blurring, distortions such as wheels not being completely round, etc., by combining sub-physical images acquired at different times and at different locations of the vehicle, the final physical image obtained more clearly and accurately reflects the structure of the side of the vehicle, enabling the recognition module to accurately identify predetermined parts of the side of the vehicle.

[0047] In one exemplary embodiment, the predetermined locations include at least two of the following: the rear wheel 104 of the vehicle 100, the rear door 107, the rear door handle 108, and the rear edge of the roof 109. These predetermined locations are all located near the trunk 105 of the vehicle 100, and the position of the trunk 105 can be roughly determined based on these predetermined locations.

[0048] In one exemplary embodiment, the identification module determines the approximate outline of the trunk 105 based on the predetermined location and the rear end 102 of the vehicle, and the calculation module determines the length L3 of the trunk 105 based on the approximate outline.

[0049] In an alternative embodiment, the calculation module obtains the length L3 of the trunk 105 by multiplying the distance between any one of the following—the front edge of the rear wheel 104, the rear edge of the rear wheel 104, the rear edge of the rear door 107, the rear end of the rear door handle 108, and the rear edge of the roof 109—and the rear end 102 of the vehicle 100 by their respective correction coefficients K. For example, if the length L3 of the trunk 105 is calculated based on the front edge of the rear wheel 104, then K is 0.5-0.6; if the length L3 of the trunk 105 is calculated based on the rear edge of the rear wheel 104, then K is 1.0-1.1; if the length L3 of the trunk 105 is calculated based on the rear end of the rear door handle 108 or the rear edge of the rear door 107, then K is 0.4-0.5. If the vehicle 100 is identified as a three-phase sedan, and the length L3 of the trunk 105 is calculated based on the rear edge of the roof 109, then K is 0.6-0.7.

[0050] In one exemplary embodiment, the position sensor 3 may be a laser sensor with a laser source, such as an area laser scanner or a multi-line laser sensor. A laser sensor generally includes a transmitter suitable for emitting a laser beam toward a target (e.g., a vehicle) and a receiver suitable for receiving the laser reflected from the target. The laser sensor can directly acquire information such as the target's distance, angle, reflection intensity, and velocity by detecting the echo signal of the emitted laser, generating a multi-dimensional image of the target. For example, a single-line lidar can calculate the distance between the single-line lidar and the target by measuring the round-trip time of the laser emission signal and the laser echo signal.

[0051] In one exemplary embodiment, the laser sensor determines the real-time position of the vehicle 100 in the inspection area 200 by scanning the front end 101 or the rear end 102 of the vehicle 100 through a calculation module, and sends the determined real-time position to the controller.

[0052] The following reference Figure 1 An example of scanning the rear end 102 of vehicle 100 to obtain the position of vehicle 100 will be illustrated. Figure 1 In the illustrated embodiment, position sensor 3 is positioned outside the inspection area and upstream of scanning device 1 in the vehicle's travel direction F. In an alternative embodiment, the position sensor can be mounted on the upper part of the inspection area via a support frame. Position sensor 3 emits a laser beam 31 towards vehicle 100, which reflects back to position sensor 3 after illuminating the vehicle. As previously mentioned, the calculation module has obtained the length L3 of the vehicle's trunk. Furthermore, the distance L1 between position sensor 3 and scanning device 1 is predetermined and constant. When vehicle 100 is in the inspection area 200 along the travel direction F (… Figure 2During operation, the position sensor 3 can measure the real-time distance L2 between the rear end 102 of the vehicle 100 and the position sensor 3 in the direction of travel by scanning the rear end 102 of the vehicle 100, thus obtaining the real-time position of the vehicle in the inspection area. It can be understood that the real-time distance L5 between the rear end 102 of the vehicle 100 and the scanning device 1 is:

[0053] L5 = L1 - L2

[0054] As vehicle 100 travels upstream of scanning device 1 along the driving direction F toward scanning device 1, the real-time distance L2 between the rear end 102 of the vehicle and position sensor 3 gradually increases and decreases. When L5 = L3, it indicates that the front end 106 of the trunk 105 of vehicle 100 is about to enter the scanning area 16 of scanning device 1. In this case, the controller determines that the front end 106 of the trunk 105 of vehicle 100 has entered the scanning area 16 of the scanning device and controls the scanning device 1 to scan and inspect the trunk 105.

[0055] As the vehicle moves, if L5 = 0, it indicates that the rear end 102 of the vehicle 100 is about to leave the scanning area 16 of the scanning device 1. The controller then controls the scanning device 1 to stop scanning to avoid scanning radiation onto the driver of the next vehicle. It is understood that, with the position sensor 3 positioned upstream of the scanning device 1 and the vehicle's position determined based on the rear end 102 of the vehicle 100, the distance L1 between the position sensor 3 and the scanning device 1 should be set to be greater than the vehicle's body length L4, for example, L1 is 5-8 meters.

[0056] Figure 4 A schematic diagram of a vehicle security inspection system according to another exemplary embodiment of the present disclosure is shown.

[0057] exist Figure 4 In one embodiment, the position sensor 3 is positioned outside the inspection area in the vehicle's direction of travel F and downstream of the scanning device 1 in the vehicle's direction of travel F, so that the position sensor 3 is suitable for determining the real-time distance L2' between the front end 101 of the vehicle and the position sensor 3.

[0058] The following reference Figure 4An example of scanning the front end 101 of vehicle 100 to obtain the position of vehicle 100 will be described. Position sensor 3 emits a laser beam 31 towards vehicle 100, and the laser beam 31 reflects back to position sensor 3 after illuminating the vehicle. As mentioned earlier, the calculation module has obtained the trunk length L3 of the vehicle. In addition, the distance L1' between position sensor 3 and scanning device 1 is predetermined and constant. As vehicle 100 travels in the inspection area 200 along the driving direction F, position sensor 3 can measure the real-time distance L2' between the front end 101 of vehicle 100 and position sensor 3 by scanning the front end 101 of vehicle 100, that is, obtain the real-time position of vehicle in inspection area. It can be understood that the real-time distance L5' between the rear end 102 of vehicle 100 and scanning device 1 is:

[0059] L5' = (L2' + L4) - L1'

[0060] As vehicle 100 travels upstream of scanning device 1 along the driving direction F toward scanning device 1, the real-time distance L2' between the front end 101 of the vehicle and position sensor 3 gradually decreases, while the vehicle length L4 and the distance L1' between position sensor 3 and scanning device 1 remain unchanged. When L5' = L3, it indicates that the front end 106 of the trunk 105 of vehicle 100 is about to enter the scanning area 16 of scanning device 1. In this case, the controller determines that the front end 106 of the trunk 105 of vehicle 100 has entered the scanning area 16 of the scanning device and controls the scanning device 1 to scan and inspect the trunk 105.

[0061] As the vehicle moves, if L5' = 0, it indicates that the rear end 102 of the vehicle 100 is about to leave the scanning area 16 of the scanning device 1. The controller then controls the scanning device 1 to stop scanning to avoid scanning radiation to the driver of the next vehicle. It is understood that, with the position sensor 3 positioned downstream of the scanning device 1 and the vehicle's position determined based on the front end 101 of the vehicle 100, the distance L1' between the position sensor 3 and the scanning device 1 should be set to be greater than the vehicle's body length L4.

[0062] While the above description illustrates an embodiment where the position sensor 3 measures the positions of the rear end 102 and front end 101 of the vehicle, enabling the controller to control the scanning device 1 to inspect the trunk 105, the embodiments disclosed herein are not limited thereto. In an alternative embodiment, the position sensor 3 can be used to measure the positions of the front wheels 103 or the rear wheels 104, allowing the controller to determine the real-time position of the vehicle in the inspection area and thus control the timing of the inspection by the scanning device 1.

[0063] In one exemplary embodiment, such as Figure 1 As shown, the vehicle safety inspection system also includes an auxiliary sensor 4. The position sensor 3 and imaging device 2 begin operating based on the triggered state of the auxiliary sensor 4. For example, the auxiliary sensor 4 includes sensors such as a light curtain switch and a ground loop coil that can sense when a vehicle arrives at a specific area.

[0064] In one exemplary embodiment, one of the imaging device 2 and the position sensor 3 is further adapted to measure the driving speed of the vehicle 100, and the controller controls the scanning frequency of the scanning device 1 according to the driving speed. This ensures that the scanning frequency of the scanning device 1 corresponds to the driving speed of the vehicle, thereby enabling the acquisition of stable scanned images.

[0065] In one exemplary embodiment, one of the imaging device 2 and the position sensor 3 is further adapted to measure the driving speed of the vehicle 100, and the controller controls the scaling of the scanned image formed by the scanning device 1 according to the driving speed. The position sensor 3 is mounted on the support frame 32 such that the height of the position sensor 3 is approximately the same as the height of the front end 101 or the rear end 102 of the vehicle 10.

[0066] In one exemplary embodiment, see Figure 2 The scanning device 1 includes two upright frames 11 disposed opposite each other on both sides of the inspection area 200; and a radiation source 13 and an array detector 14 respectively disposed on the two upright frames 11. Further, the scanning device 1 also includes a crossbeam 12 disposed on the upright frames 11. The imaging device 2 can be mounted on the outside of the inspection area 200 using a support frame 21, and the height of the imaging device 2 from the ground is in the range of approximately 1-1.5 meters.

[0067] In one exemplary embodiment, the scanning device 1 further includes two shielding walls 15, respectively disposed on the upright frame 1, to shield radiation from the radiation source.

[0068] Figure 5 A block diagram of a security inspection method according to an exemplary embodiment of this disclosure is shown.

[0069] According to another embodiment of this disclosure, a method for inspecting the trunk of a vehicle using the vehicle security inspection system described in any of the above embodiments is provided, comprising the following steps: Step S100, acquiring a real image of the side of a vehicle 100 entering the inspection area 200 using an imaging device 2; Step S200, identifying the real image using an identification module, and determining a predetermined part and rear end 102 of the vehicle 100 based on the identified real image; Step S300, calculating the length L3 of the trunk of the vehicle using a calculation module based on the determined predetermined part and rear end 102; Step S400, detecting the real-time position of the vehicle 100 in the inspection area 200 using a position sensor 3; Steps S500 and S600, controlling the scanning device 1 to scan and inspect the trunk when the front end 106 of the trunk 105 of the vehicle 100 enters the scanning area 16 of the scanning device 1 based on the length L3 of the trunk 102 and the real-time position, using a controller.

[0070] Specifically, in step S500, the controller determines whether the front end 106 of the trunk 105 of the vehicle 100 has entered the scanning area 16 of the scanning device 1 based on the length L3 of the trunk 102 and its real-time position. If the controller determines that the front end 106 of the trunk 105 of the vehicle 100 has entered the scanning area 16, then step S600 is executed, that is, the controller controls the scanning device 1 to scan and inspect the trunk 105. If the controller determines that the front end 106 of the trunk 105 of the vehicle 100 has not entered the scanning area 16, then the operation process returns to step S400.

[0071] According to the security inspection method of this disclosure, when the controller determines that the front end 106 of the trunk 105 of the vehicle 100 has entered the scanning area 16 of the scanning device based on the length L3 of the trunk 102 and the real-time position of the vehicle 100 measured by the position sensor 3, the controller controls the scanning device 1 to scan and inspect the trunk 105. In this way, the scanning device 1 only performs a security inspection on the trunk 105 of the vehicle 100, and the driver and passengers of the vehicle 100 do not need to be driving, nor does the vehicle need to be stopped, thus achieving the vehicle scanning and inspection.

[0072] In one embodiment, see Figure 1 When the rear end 105 of the vehicle 100 leaves the scanning area 16 of the scanning device 1 based on the real-time location, the controller controls the scanning device 1 to stop scanning and checking in preparation for the next security check operation.

[0073] In one embodiment, the step of acquiring a physical image of the side of a vehicle 100 entering the inspection area 200 includes: combining multiple sub-physical images of the vehicle acquired by the imaging device 2 at different locations in the inspection area 200 to obtain the physical image. By combining sub-physical images acquired at different times and at different locations of the vehicle, the final physical image obtained more clearly and accurately reflects the structure of the side of the vehicle, enabling the recognition module to accurately identify predetermined parts of the side of the vehicle.

[0074] In one exemplary embodiment, the predetermined locations include at least two of the following: the rear wheel 104 of the vehicle 100, the rear door 107, the rear door handle 108, and the rear edge of the roof 109. These predetermined locations are all located near the trunk 105 of the vehicle 100, and the position of the trunk 105 can be roughly determined based on these predetermined locations.

[0075] In one exemplary embodiment, the recognition module determines the approximate outline of the trunk 105 based on the predetermined location and the rear end 102 of the vehicle, and the calculation module determines the length L3 of the trunk 105 based on the approximate outline.

[0076] In an alternative embodiment, the calculation module obtains the length L3 of the trunk 105 by multiplying the distance between any one of the following—the front edge of the rear wheel 104, the rear edge of the rear wheel 104, the rear edge of the rear door 107, the rear end of the rear door handle 108, and the rear edge of the roof 109—and the rear end 102 of the vehicle 100 by their respective correction coefficients K. For example, if the length L3 of the trunk 105 is calculated based on the front edge of the rear wheel 104, then K is 0.5-0.6; if the length L3 of the trunk 105 is calculated based on the rear edge of the rear wheel 104, then K is 1.0-1.1; if the length L3 of the trunk 105 is calculated based on the rear end of the rear door handle 108 or the rear edge of the rear door 107, then K is 0.4-0.5. If the vehicle 100 is identified as a three-phase sedan, and the length L3 of the trunk 105 is calculated based on the rear edge of the roof 109, then K is 0.6-0.7.

[0077] According to the vehicle buffer plate security inspection system and method of this disclosure, security checks can be conducted on vehicles about to enter public security, judicial, prison, customs, border inspection, anti-smuggling and anti-drug, airport, important government agencies, important security agencies, military bases, consulates, passageways to residences of important figures, important conference venues, etc. The system checks the vehicle's trunk without stopping the vehicle or the driver getting out, to check for contraband such as drugs, smuggled goods, controlled knives, firearms, flammable and explosive materials. The scanning device only emits radiation beams during the trunk inspection, thus avoiding radiation exposure to the driver and other passengers, improving safety.

[0078] According to the vehicle buffer plate security inspection system and method of this disclosure, the area scan camera can accurately identify the contour of the vehicle's side, effectively identify the length of the trunk, and perform corresponding scans according to different trunk lengths to ensure the integrity and accuracy of the scan. The composite module effectively combines multiple sub-images of the physical object acquired by the imaging device at different positions to obtain the final physical image, which can accurately determine the length of the trunk. Using a position sensor to determine the vehicle's position is easy to install and low in cost in practical applications. It does not emphasize the strict tilt angle of the position sensor in the installation procedure; it is only necessary to ensure that the laser can be reflected back to the position sensor. The position sensor can perform continuous detection, accurately locate the vehicle, measure its speed, and determine the direction of object movement.

[0079] Those skilled in the art will understand that the embodiments described above are exemplary and can be improved upon. The structures described in the various embodiments can be freely combined without causing structural or principle conflicts.

[0080] Although this disclosure has been described in conjunction with the accompanying drawings, the embodiments disclosed in the drawings are intended to exemplify preferred embodiments of this disclosure and should not be construed as limiting the disclosure. While some embodiments of the inventive concept of this disclosure have been shown and described, those skilled in the art will understand that changes may be made to these embodiments without departing from the principles and spirit of the overall inventive concept, the scope of which is defined by the claims and their equivalents.

Claims

1. A vehicle safety inspection system, comprising: A scanning device (1) is installed in the inspection area (200) and is suitable for scanning the vehicle to be inspected in the scanning area located within the inspection area; Imaging device (2), suitable for acquiring a physical image of the side of a vehicle entering the inspection area; The composite module is suitable for combining multiple sub-images of the vehicle at different locations in the inspection area acquired by the imaging device at different times to obtain a composite image. The recognition module is adapted to recognize the composite physical image and determine the rear wheel and rear end (102) of the vehicle based on the recognized composite physical image. The calculation module is suitable for calculating the length of the vehicle's trunk by multiplying the distance between the front edge of the rear wheel and the rear end of the vehicle by 0.5-0.6, or by multiplying the distance between the rear edge of the rear wheel and the rear end of the vehicle by 1.0-1.

1. A position sensor (3) is used to detect the real-time position of the vehicle in the inspection area; The auxiliary sensor (4) is used to start operating the position sensor and the imaging device according to the state of the auxiliary sensor being triggered. The auxiliary sensor includes a light curtain switch and a ground induction coil. as well as The controller is adapted to control the scanning device to scan and inspect the trunk when the front end of the trunk of the vehicle enters the scanning area of ​​the scanning device based on the length and real-time position of the trunk.

2. The vehicle security inspection system according to claim 1, wherein, The controller is further adapted to control the scanning device to stop scanning when it is determined, based on the real-time location, that the rear end of the vehicle has left the scanning area of ​​the scanning device.

3. The vehicle security inspection system according to any one of claims 1-2, wherein, Position sensors include laser sensors.

4. The vehicle security inspection system according to claim 3, wherein, The laser sensor determines the real-time position of the vehicle in the inspection area by scanning the front or rear end of the vehicle.

5. The vehicle security inspection system according to any one of claims 1-2, wherein, One of the imaging device and the position sensor is further adapted to measure the vehicle's speed. The controller controls the scanning frequency of the scanning device according to the driving speed.

6. The vehicle security inspection system according to any one of claims 1-2, wherein, One of the imaging device and the position sensor is further adapted to measure the vehicle's speed. The controller adjusts the scale of the scanned image generated by the scanning device according to the driving speed.

7. The vehicle security inspection system according to any one of claims 1-2, wherein, The scanning device includes: Two upright frames (11) are arranged opposite each other on both sides of the inspection area; and Radiation source (13) and array detector (14) are respectively set on two upright frames.

8. The vehicle security inspection system according to claim 7, wherein, The scanning device also includes two shielding walls (15), which are respectively set on the upright frame to shield radiation from the radiation source.

9. A method for inspecting a vehicle using a vehicle security inspection system according to any one of claims 1-8, comprising the following steps: Acquire a physical image of the side of the vehicle entering the inspection area; Identify the physical image and determine the predetermined part and rear end (102) of the vehicle based on the identified physical image. The length of the vehicle's trunk is calculated based on the determined predetermined location and rear end. Detect the real-time position of the vehicle in the inspection area; as well as When the front end of the vehicle's trunk enters the scanning area of ​​the scanning device based on the length and real-time position of the trunk, the scanning device is controlled to scan and inspect the trunk.

10. The security inspection method according to claim 9, wherein, If, based on the real-time location, the rear end of the vehicle leaves the scanning area of ​​the scanning device, the scanning device is controlled to stop scanning and inspection.

11. The security inspection method according to claim 9 or 10, wherein, The steps for acquiring a physical image of the side of a vehicle entering the inspection area include: The imaging device acquires multiple sub-images of the vehicle at different locations in the inspection area and combines them to obtain the physical image.

Images