Vehicle detection system and detection method

Abstract

The invention discloses a vehicle detection system and a detection method. The vehicle detection system comprises a detection road surface, a detection door, a scanning device, an imaging device, a sensing device and a central control device, the detection door is arranged on the detection road surface, and a detection channel is formed between the detection door and the detection road surface; the scanning device is arranged at the top of the detection door and can scan downwards; the imaging device is arranged on a detection road surface; the central control device comprises a timing module, the central control device is in communication connection with the scanning device, the imaging device and the sensing device, and the vehicle detection method is a use method of the vehicle detection system. Through the vehicle detection system and the detection method, the inspection station can realize automatic security inspection through X-ray scanning imaging, and the X-ray can realize accurate scanning of the vehicle trunk, so that the security inspection efficiency is greatly improved, the vehicle can pass quickly, traffic jam is avoided or relieved, and people in the vehicle cannot be affected; and the working pressure of workers is relieved.

Description

Technical Field

[0001] This application relates to the field of security inspection technology, and in particular to a vehicle inspection system and inspection method. Background Technology

[0002] Currently, police checkpoints are set up nationwide at major entrances and exits around national borders, regions, and provinces / municipalities, while security checkpoints are established on main urban roads and key locations for routine security checks of vehicles and personnel. Checkpoint inspections are law enforcement actions by police officers to maintain public safety by inspecting and searching the vehicles of specific individuals. Currently, close-contact security checks are the primary method for vehicle inspections. Vehicles need to stop for staff to open the trunk and check luggage, which is not only physically demanding and tedious but also provides a poor experience for those being inspected. Summary of the Invention

[0003] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a vehicle inspection system capable of automatically emitting X-rays to scan vehicles, resulting in high inspection efficiency.

[0004] This application also proposes a detection method using the aforementioned vehicle detection system.

[0005] A vehicle detection system according to a first aspect of this application includes: Road surface inspection, used for vehicle passage and inspection; A detection gate is installed on the detection surface, and a detection channel is formed between the detection gate and the detection surface. A scanning device is installed at the top of the detection gate and is capable of scanning downwards; An imaging device is disposed on the road surface to be detected. The imaging device is disposed below the scanning device and is used to receive the rays emitted by the scanning device to form a detection image. A sensing device is installed on the detection surface to detect oncoming vehicles; The central control device includes a timing module and is communicatively connected to the scanning device, imaging device, and sensing device.

[0006] The vehicle detection system according to the embodiments of this application has at least the following beneficial effects: By installing inspection surfaces, gates, scanning devices, and imaging equipment, the checkpoint can achieve automated security checks through X-ray scanning imaging. Vehicles do not need to stop and disembark for inspection, and staff do not need to open the trunks of each vehicle for inspection. This greatly improves security efficiency, reduces the workload of staff, enhances the travel experience for pedestrians, and allows vehicles to pass through quickly, avoiding or alleviating traffic congestion. Positioning the scanning device at the top of the inspection gate provides a better scanning angle and superior imaging results.

[0007] By setting up a sensing device and a timing module, the scanning device can be turned on and off through the timing module, thus enabling precise scanning of the vehicle's trunk. This avoids X-rays affecting the occupants of the vehicle and also reduces interference from other parts of the vehicle, improving inspection efficiency.

[0008] According to some embodiments of this application, an image recognition device is provided on the detection channel, and the image recognition device is communicatively connected to the central control device.

[0009] In this embodiment of the application, the sensing device on the top of the detection door is a photosensitive sensor, and a searchlight is provided on the top of the detection door, which is used to emit light downwards.

[0010] According to some embodiments of this application, the scanning device is an X-ray emitter, and the imaging device is an X-ray receiving imaging device.

[0011] According to some embodiments of this application, a pit is provided on the road surface to be detected, the imaging device is disposed in the pit, a drainage channel is provided below the imaging device, and the drainage channel is connected to a drainage pipe.

[0012] According to some embodiments of this application, the imaging device is connected to a cooling device.

[0013] According to some embodiments of this application, the imaging device includes a housing and a detection unit. The detection unit is disposed in the middle of the housing. An air supply channel and a return air channel are respectively provided on both sides of the detection unit. The air supply channel is connected to an air supply duct and the air supply duct is connected to the cooling device. The return air channel is connected to a return air duct and the return air duct is connected to the cooling device.

[0014] A vehicle detection method according to a second aspect of this application includes the vehicle detection system described above, wherein the timing module includes a first timer and a second timer, and the vehicle detection method includes the following steps: The vehicle is instructed to pass through the detection channel at a constant speed, and the vehicle's passing speed is specified. The timing of the first timer and the timing of the second timer are determined based on the vehicle's speed. When the front of the vehicle passes the sensor, the sensor sends a signal to the central control unit, and the first timer starts counting. When the first timer expires, the scanning device emits X-rays. At this time, the vehicle's trunk is below the scanning device, and the second timer starts counting down. When the second timer expires, the scanning device stops emitting X-rays. After the X-rays pass through the tail box, they are received by the imaging device, which then generates a detection image.

[0015] According to the embodiments of this application, at least the following beneficial effects are achieved: By requiring vehicles to pass through the detection channel at a constant speed, the duration of the first and second timers can be determined to ensure that the scanning device emits X-rays when the vehicle's trunk reaches below it, thus ensuring accurate scanning of the vehicle's trunk and avoiding X-rays hitting the people in the vehicle.

[0016] According to some embodiments of this application, the vehicle detection system further includes an identification device for detecting the distance between the front of the vehicle and the trunk, and for detecting the length of the vehicle's trunk.

[0017] According to some embodiments of this application, the identification device is an image recognition device, the central control device includes a memory, the memory stores a database, and the vehicle detection method includes the following steps: Collect vehicle model data, which includes vehicle images and the distance between the front and rear of the vehicle. There is a one-to-one correspondence between the vehicle images and the distance between the front and rear of the vehicle. The collected vehicle model data is input into the database to form a vehicle model dataset; Set the timer duration to s, where s = x / h. Where x is the distance between the front of the vehicle and the rear of the vehicle, and h is the vehicle's speed. The image recognition device captures an image of the vehicle and uploads it to the central control unit. The central control unit matches the detected image with vehicle model data in the database. Based on the matching result, it obtains the timer duration and sends the timer duration to the timer.

[0018] According to some embodiments of this application, the vehicle detection system includes an alarm device, and the vehicle detection method includes the following steps: Upload alarm data to the database; After the imaging device generates the detection image, it uploads the detection image to the central control device. The central control device compares the detection image with the alarm data in the database. If the comparison is successful, the alarm device issues an alarm.

[0019] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0020] The accompanying drawings are used to provide a further understanding of the technical solutions disclosed in this application and form part of the specification. They are used together with the embodiments disclosed in this application to explain the technical solutions of this application and do not constitute a limitation on the technical solutions disclosed in this application.

[0021] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application; Figure 2 This is a side view of an embodiment of the present application. Figure 3 This is a bottom view of the structure according to an embodiment of this application; Figure 4 This is a schematic diagram of the imaging device structure according to an embodiment of this application; Figure 5 This is a hardware structure block diagram of an embodiment of this application; Figure 6 This is a flowchart illustrating the implementation method of this application. Figure 7 This is a schematic diagram of the layout structure of the vehicle detection system according to an embodiment of this application; Figure 8 This is a schematic diagram of the layout structure of the infrared sensor according to an embodiment of this application; Figure 9 This is a schematic diagram of the state when a vehicle enters the sensing range according to an embodiment of this application; Figure 10 This is a schematic diagram of the vehicle undergoing inspection according to an embodiment of this application.

[0022] Reference numerals: Vehicle 100, tail box 101, road surface to be inspected 110, inspection door 120, inspection channel 121, image recognition device 122, scanning device 130, X-ray source 131, X-ray controller 132, X-ray 133, imaging device 140, housing 141, detection unit 142, air supply channel 143, return air channel 144, sensing device 150, central control device 160, timing module 161, first timer 162, second timer 163, pit 170, drainage channel 171, drainage pipe 172, cooling device 180, air supply duct 181, return air duct 182, display device 190. Detailed Implementation

[0023] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0024] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and 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. Therefore, they should not be construed as limitations on this application.

[0025] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0026] This application also proposes a detection method using the aforementioned vehicle detection system.

[0027] Please see Figures 1-5 According to a first aspect of this application, a vehicle detection system is used to perform safety detection on a vehicle 100 to prevent the vehicle from carrying dangerous goods on the road or entering some heavily guarded places, thereby ensuring public safety. The vehicle detection system includes a detection road surface 110, a detection gate 120, a scanning device 130, an imaging device 140, a sensing device 150, and a central control device 160. The detection road surface 110 is used for vehicle 100 passage and vehicle safety detection. The detection gate 120 is set on the detection road surface 110, and a detection channel 121 is formed between the detection gate 120 and the detection road surface 110. The scanning device 130 is set on top of the detection gate 120 and can perform downward scanning. The imaging device 140 is set on the detection road surface 110 and is located directly below the scanning device 130. The imaging device 140 is used to receive the rays emitted by the scanning device 130 to form a detection image. The sensing device 150 is set on the detection road surface 110 and is used to sense oncoming vehicles. The central control device 160 includes a timing module 161 and is communicatively connected to the scanning device 130, the imaging device 140, and the sensing device 150.

[0028] By setting up the sensing device 150, when the vehicle drives onto the detection channel 121, the sensing device 150 sends a signal to the central control device 160, and the timing module 161 starts timing. When the trunk 101 of the vehicle 100 reaches the scanning device 130, the timing module 161 ends timing, the central control device 160 sends a signal to the scanning device 130, and the scanning device 130 emits X-rays downwards. The X-rays pass through the trunk 101 of the vehicle 100 and are absorbed by the imaging device 140 to form a detection image of the vehicle trunk.

[0029] With the above structure, the checkpoint can achieve automated security checks. Vehicles do not need to stop and get out of the car for inspection when passing through, and staff do not need to open the trunk of each vehicle for inspection. This greatly improves security efficiency, allows vehicles to pass through quickly, and avoids or alleviates traffic congestion.

[0030] In related technologies, when using X-rays for security checks, the X-rays in the detection channel are always on, providing continuous irradiation. Since vehicles can pass through quickly, the work effect of rapid inspection is achieved. In most cases, a single rapid X-ray scan does not cause much impact on the human body. Therefore, those skilled in the art do not feel any pain points, and it is difficult for them to have the idea and motivation to improve the equipment. However, for people who frequently pass through the inspection station, such as pregnant women and patients, X-ray irradiation may cause certain harm.

[0031] To address the aforementioned issues, this application embodiment incorporates a timing module 161 to control the opening and closing of the scanning device 130. This allows for precise scanning of the trunk 101 of the vehicle 100, preventing X-rays from affecting occupants and reducing interference from other parts of the vehicle, thereby improving inspection efficiency.

[0032] This application embodiment is mainly applied to the inspection of small and medium-sized vehicles. Since small and medium-sized vehicles are relatively low in height and have fewer objects in the vertical direction, and the luggage and other items in the trunk are usually placed flat, setting the scanning device 130 at the top of the inspection door and having the X-ray scan from top to bottom is a better scanning angle, which can ensure that the X-ray needs to pass through fewer objects and the clarity of the inspection image is higher.

[0033] Furthermore, in this embodiment of the application, the scanning device 130 includes an X-ray source 131 and an X-ray controller 132. The X-ray source 131 is communicatively connected to the X-ray controller 132, and the X-ray controller 132 is communicatively connected to the central control device 160. The central control device 160 can control the opening and closing of the X-ray source 131 through the X-ray controller 132.

[0034] This embodiment of the application utilizes the principle of X-ray transmission imaging to scan and image a vehicle. The X-ray source 131 emits X-rays 133 of a certain intensity, which penetrate the vehicle being inspected. Part of the X-rays are absorbed and attenuated, while the rest pass through the vehicle and irradiate the high-sensitivity imaging device 140. The imaging device 140 converts the received X-ray signals into electrical and digital signals and transmits the converted signals to the central control device 160 for processing, finally obtaining the inspection image of the vehicle being inspected.

[0035] Specifically, the scanning device 130 also includes a collimator, which is disposed below the X-ray source and is used to limit the scanning range of the X-ray 133. Specifically, in this embodiment, the preferred scanning angle of the X-ray 133 is 50°. Experimental verification shows that the detection image obtained by the 50° scanning angle has better effect.

[0036] According to some embodiments of this application, an image recognition device 122 is provided on the detection channel 121, and the image recognition device 122 is communicatively connected to the central control device 160.

[0037] The sensing device 150 is a photosensitive sensor. The sensing device 150 is installed on the detection road surface 110 and is located below the scanning device 130. A searchlight is installed on the top of the detection gate 120, which is used to emit light downwards.

[0038] The sensing device 150 is configured as a photosensitive sensor. When a vehicle passes by the sensing device 150, the light source of the photosensitive sensor is blocked, thereby sensing the vehicle's passage and sending a signal to the central control device 160. A searchlight is installed on the top of the detection gate 120 to supplement the light in scenarios with no natural light or weak natural light, such as at night, to ensure the normal operation of the sensing device 150.

[0039] According to some embodiments of this application, a pit 170 is provided on the road surface 110, an imaging device 140 is provided in the pit 170, the upper surface of the imaging device 140 is flush with the road surface 110, a drainage channel 171 is provided below the imaging device 140, and a drainage pipe 172 is connected to the drainage channel 171.

[0040] By installing a drainage channel 171 and a drainage pipe 172 below the imaging device 140, when water from the road surface seeps into the pit, it can flow through the drainage pipe to the water well outside the lane, preventing the imaging device 140 from being submerged in water. At the same time, the imaging device 140 has a completely sealed internal structure, effectively preventing dust, moisture, and rain.

[0041] According to some embodiments of this application, the imaging device 140 is connected to a cooling device 180, which may be an air conditioner, a blower, a refrigeration unit, etc.

[0042] Specifically, the imaging device 140 includes a housing 141 and a detection unit 142. The detection unit 142 is located in the middle of the housing 141. An air supply channel 143 and a return air channel 144 are respectively provided on both sides of the detection unit 142. The air supply channel 143 is connected to an air supply duct 181, which is connected to a cooling device 180. The return air channel 144 is connected to a return air duct 182, which is connected to the cooling device 180.

[0043] The imaging device 140 is equipped with a temperature and humidity sensor. The air supply duct 181 and return air duct 182 of the cooling device 181 are fixedly connected to the housing 141. The temperature and humidity sensor provides a signal for cooling to ensure that the internal space of the imaging device 140 is kept at a constant temperature.

[0044] Specifically, the detection unit 142 can be a digital X-ray acquisition card, and the central control device 160 includes an image processing module 164. The main function of the digital X-ray acquisition card is to convert the transmitted X-rays into digital signals and output them to the image processing module 164. The central control device 160 outputs the detection image processed by the image processing module 164 to the display device 190.

[0045] In other embodiments of this application, please refer to Figures 7-10 The sensing device 150 of the vehicle detection system in this application embodiment includes a first laser sensor 151 and a second laser sensor 152 disposed on both sides of the detection gate 120. The sensing range of the first laser sensor 151 and the second laser sensor 152 is fan-shaped. When the trunk 100 of the vehicle reaches below the X-ray source 131, the rear of the vehicle leaves the sensing range of the first laser sensor 151, while the front of the vehicle enters the sensing range of the laser sensor 152.

[0046] When a vehicle enters the sensing range of the first laser sensor 151, the system begins preparation. When the vehicle leaves the sensing range of the first laser sensor 151 and enters the sensing range of the second laser sensor 152, the X-ray source emits X-rays downwards to accurately scan the vehicle's trunk. Through the cross-sensing of the first laser sensor 151 and the second laser sensor 152, the system can accurately locate the moving vehicle in real time, automatically avoid the driver and passengers' positions without stopping, perform X-ray scanning imaging of the vehicle's trunk, and automatically identify and issue an alarm for any controlled or suspicious items such as knives or guns that may be placed in the trunk.

[0047] Furthermore, the sensing device 150 may also include an infrared sensor 153 mounted on the detection gate 120. The height of the infrared sensor 153 is the same as that of the wheel. When the infrared sensor 153 detects the wheel for the first time, it indicates that the front wheel of the vehicle has reached the infrared sensor 153, and the system begins preparation. When the infrared sensor 153 detects the wheel for the second time, it indicates that the rear wheel of the vehicle has reached the infrared sensor 153. At this time, the trunk of the car is below the X-ray source, and the X-ray source emits X-rays to scan the trunk of the car. Through the cross-sensing of the infrared sensor 153 and the first laser sensor 151 and the second laser sensor 152, the positioning accuracy of the system is further improved, thereby accurately detecting the trunk of the vehicle.

[0048] Furthermore, the sensing device 150 also includes a grating 154. When the grating 154 senses the front of the vehicle, the system prepares; when the grating 154 senses the rear of the vehicle, the X-ray detection ends. The accuracy of the system is further improved through the cross-sensing of the grating 154, the infrared sensor 153, the first laser sensor 151, and the second laser sensor 152.

[0049] Furthermore, this application embodiment also includes a traffic guidance screen 111 installed on the detection road surface 110 for guiding the driver forward.

[0050] Furthermore, this application embodiment also includes a license plate recognition camera 112 installed on the detection road surface 110 for recognizing vehicle license plates.

[0051] Please see Figures 1-6 A vehicle detection method according to a second aspect of this application includes a vehicle detection system, wherein a central control device 160 includes a first timer 162 and a second timer 163, and the vehicle detection method includes the following steps: The vehicle is instructed to pass through detection lane 121 at a constant speed, and a passing speed of vehicle 100 is specified. The timing of the first timer 162 and the timing of the second timer 163 are determined based on the vehicle's speed. When the front of vehicle 100 passes the scanning device 130, the sensing device 150 senses vehicle 100 and sends a signal to the central control device 160, and the first timer 162 starts counting. When the first timer 162 finishes its countdown, the scanning device emits X-rays. At this time, the vehicle's trunk reaches below the scanning device, and the second timer 163 starts its countdown. When the second timer finishes its countdown, the scanning device stops emitting X-rays. After the X-ray passes through the tail box 101, it is received by the imaging device 140. The imaging device 140 converts the received X-ray into a digital signal and transmits it to the central control device 160 to generate a detection image. The detection image can be output to the display device 190. The staff can judge whether the vehicle is carrying dangerous goods by visually viewing the detection image on the display device 190.

[0052] By specifying that the vehicle 100 passes through the detection channel 121 at a certain constant speed, the timing duration of the first timer 162 and the second timer 163 can be determined to ensure that the scanning device 130 emits X-rays when the tail box 101 of the vehicle 100 reaches below the scanning device 130, thus ensuring that the X-rays accurately scan the tail box 101 of the vehicle and avoiding X-rays from hitting the people in the vehicle.

[0053] According to some embodiments of this application, the vehicle detection system further includes an identification device for detecting the distance between the front of the vehicle and the trunk, as well as the length of the vehicle's trunk.

[0054] According to some embodiments of this application, the identification device is an image recognition device 122, the central control device 160 includes a memory, the memory stores a database, the database stores vehicle model data, and the vehicle detection method includes the following steps: Set the timing duration of the first timer 162 to s, where s = x / h, and set the timing duration of the second timer to s', where s' = y / h. Where x is the distance between the front of the vehicle and the rear of the vehicle, y is the length of the rear of the vehicle, and h is the vehicle's speed. Image recognition device 122 captures vehicle images and uploads them to the central control device. The central control device matches the detected images with vehicle model data in the database. Based on the matching results, it obtains the distance between the front and rear of the passing vehicle and the length of the trunk, and calculates the timing duration of the first timer 162 and the timing duration of the second timer 163. The central control device 160 sends the timing duration of the first timer to the first timer 162 and the timing duration of the second timer to the second timer 163.

[0055] Specifically, the image recognition device 122 in this embodiment includes a camera. Vehicle model data includes images and size data of various vehicle models. Size data includes vehicle length, height, distance from the front to the rear, and rear cargo box length. The camera captures photos of the vehicle to be inspected and transmits them to the central control device 160. The central control device 160 performs feature analysis on the captured images and compares them with vehicle model data in the database to determine the vehicle model. It also obtains the size data corresponding to the vehicle model and calculates the timing duration of the first timer 162 and the second timer 163. Simultaneously, when using the vehicle detection method of this embodiment, staff can select the vehicle speed according to the actual situation and input it into the system, while simultaneously notifying the driver to control the speed via a large screen or horn.

[0056] According to some embodiments of this application, the vehicle detection system includes an alarm device 200, the database includes alarm data, and the vehicle detection method includes the following steps: After the imaging device 130 generates a detection image, it uploads the image to the central control device 160. The central control device 160 compares the detection image with the alarm data in the database. At the same time, the photo taken by the image recognition device 122 is also compared with the alarm data in the database. If the comparison is successful, the alarm device issues an alarm. Specifically, the alarm data includes hazardous material characteristic data, suspicious and dangerous vehicle data, etc.

[0057] By comparing the detected and captured images with data in the database, suspicious vehicles can be quickly identified, improving inspection efficiency and reducing errors caused by staff fatigue, negligence, or other reasons.

[0058] In some alternative embodiments, the functions / operations mentioned in the block diagrams may not occur in the order shown in the operation diagrams. For example, depending on the functions / operations involved, two consecutively shown blocks may actually be executed substantially simultaneously, or the blocks may sometimes be executed in reverse order. Furthermore, the embodiments presented and described in the flowcharts of this application are provided by way of example to provide a more comprehensive understanding of the technology. The disclosed methods are not limited to the operations and logic flows presented herein. Alternative embodiments are contemplated in which the order of various operations is changed and sub-operations described as part of a larger operation are executed independently.

[0059] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application. Furthermore, unless otherwise specified, the embodiments and features described in the embodiments of this application can be combined with each other.

Claims

1. A vehicle detection system, characterized in that, include: Road surface inspection, used for vehicle passage and inspection; A detection gate is installed on the detection surface, and a detection channel is formed between the detection gate and the detection surface. A scanning device is installed at the top of the detection gate and is capable of scanning downwards; An imaging device is disposed on the road surface to be detected. The imaging device is disposed below the scanning device and is used to receive the rays emitted by the scanning device to form a detection image. A sensing device is installed on the detection surface to detect oncoming vehicles; The central control device includes a timing module, and the central control device is communicatively connected to the scanning device, imaging device, and sensing device.

2. The vehicle detection system according to claim 1, characterized in that, An image recognition device is installed on the detection channel, and the image recognition device is communicatively connected to the central control device.

3. The vehicle detection system according to claim 1, characterized in that, The sensing device is a photosensitive sensor, and a searchlight is installed on the top of the detection door, which is used to emit light downwards.

4. The vehicle detection system according to claim 1, characterized in that, A pit is set on the road surface to be inspected, the imaging device is set inside the pit, a drainage channel is set below the imaging device, and a drainage pipe is connected to the drainage channel.

5. The vehicle detection system according to claim 4, characterized in that, The imaging device is connected to a cooling device.

6. The vehicle detection system according to claim 5, characterized in that, The imaging device includes a housing and a detection unit. The detection unit is located in the middle of the housing. An air supply channel and a return air channel are respectively provided on both sides of the detection unit. The air supply channel is connected to an air supply pipe, and the air supply pipe is connected to the cooling device. The return air channel is connected to a return air pipe, and the return air pipe is connected to the cooling device.

7. A vehicle inspection method, characterized in that, The vehicle detection system according to claim 1, wherein the timing module includes a first timer and a second timer, and the vehicle detection method includes the following steps: The vehicle is instructed to pass through the detection channel at a constant speed, and the vehicle's passing speed is specified. The timing of the first timer and the timing of the second timer are determined based on the vehicle's speed. When the front of the vehicle passes the scanning device, the sensor detects the vehicle and sends a signal to the central control device, and the first timer starts counting. When the first timer expires, the scanning device emits X-rays, and at the same time, the second timer starts counting down; when the second timer expires, the scanning device stops emitting X-rays. After the X-rays pass through the tail box, they are received by the imaging device, which then generates a detection image.

8. The vehicle detection method according to claim 7, characterized in that, The vehicle detection system also includes an identification device for detecting the distance between the front of the vehicle and the trunk, as well as the length of the vehicle's trunk.

9. The vehicle inspection method according to claim 8, characterized in that, The identification device is an image recognition device, the central control device includes a memory, the memory stores a database containing vehicle model data, and the vehicle detection method includes the following steps: Set the duration of the first timer to s, where s = x / h, and set the duration of the second timer to s', where s' = y / h. Where x is the distance between the front of the vehicle and the rear of the vehicle, y is the length of the rear of the vehicle, and h is the vehicle's speed. The image recognition device captures vehicle images and uploads them to the central control unit. The central control unit matches the detected images with vehicle model data in the database. Based on the matching results, it obtains the distance between the front and rear of the passing vehicle and the length of the trunk, and calculates the duration of the first timer and the duration of the second timer.

10. The vehicle detection method according to claim 9, characterized in that, The vehicle detection system includes an alarm device, and the vehicle detection method includes the following steps: Upload alarm data to the database; After the imaging device generates the detection image, it uploads the detection image to the central control device. The central control device compares the detection image with the alarm data in the database. If the comparison is successful, the alarm device issues an alarm.

Images