CN-121979035-A - Self-adaptive vehicle cold cathode X-ray detection control method, system, equipment and product

CN121979035ACN 121979035 ACN121979035 ACN 121979035ACN-121979035-A

Abstract

The embodiment of the application relates to the technical field of vehicle safety inspection and discloses a self-adaptive vehicle cold cathode X-ray detection control method, a system, equipment and a product, wherein the method comprises the steps of acquiring external contour data of a vehicle to be inspected, which is acquired by a triaxial measuring device, when the vehicle to be inspected enters a detection area, wherein the external contour data at least comprises the height of the vehicle from the ground; the method comprises the steps of detecting the external contour data of a vehicle to be detected, identifying the type of the vehicle to be detected according to the external contour data of the vehicle to be detected, matching voltage levels of an X-ray source according to the identified type of the vehicle, wherein different types of the vehicle correspond to different bias voltage modes, determining the starting time of the X-ray source, responding to the starting time, driving the X-ray source to emit beams according to the matched voltage levels, and scanning the vehicle to be detected, so that the intelligent level of vehicle security detection is remarkably improved through refined triaxial measurement and grading voltage control.

Inventors

SUN JIAWEI
JIA SHAOJUN
WANG ZHEN

Assignees

上海得予智能科技有限公司

Dates

Publication Date: 20260505
Application Date: 20260112

Claims (10)

1. An adaptive vehicle cold cathode X-ray detection control method, the method comprising: when a vehicle to be detected enters a detection area, acquiring external contour data of the vehicle to be detected, which is acquired by a triaxial measuring device, wherein the external contour data at least comprises the height of the vehicle from the ground; identifying a vehicle type of the vehicle to be inspected according to the external contour data of the vehicle to be inspected; According to the identified vehicle type, matching the voltage level of the X-ray source, wherein different vehicle types correspond to different bias voltage modes; And determining the starting time of the X-ray source, and responding to the starting time, driving the X-ray source to emit beams according to the matched voltage level, and scanning the vehicle to be detected.
2. The method according to claim 1, characterized in that said step of matching the voltage level of the X-ray source according to the identified vehicle type, in particular comprises: If the vehicle type is determined to be a car, matching a negative bias voltage mode to reduce radiation dose; If the vehicle type is determined to be a minibus or a medium-sized truck, matching a rated voltage mode; if the vehicle type is determined to be a freight truck, the forward bias voltage mode is matched to improve penetration.
3. The method of claim 1, wherein the X-ray source is configured with a movable shutter mechanism, the method further comprising: Calculating a shading distance of the shading mechanism which needs to move downwards according to the vehicle ground clearance, the lane width of the detection channel and the preset beam outlet angle parameters of the X-ray source; before the X-ray source emits the beam, the shading mechanism is driven to move downwards for shading distance, and the irradiation range of the X-ray beam is adjusted.
4. A method according to claim 3, wherein the shading distance is calculated as follows: calculating the beam-out angle of the top edge of the vehicle relative to the horizontal line by taking the horizontal line of the focus of the X-ray source as a reference The formula is satisfied: Wherein H is the height of the vehicle from the ground, H is the vertical distance between the focus of the X-ray source and the ground, m is the width of a lane, W is the width of the vehicle to be detected; according to the initial preset beam-out angle beta and the calculated beam-out angle Calculating a shading distance L5 of the shading mechanism in the transmitting box: wherein D is the horizontal distance from the focal point of the X-ray source to the plane of the shading mechanism.
5. The method according to claim 1, wherein the detection area is provided with a height sensor and a sensor array consisting of a plurality of position sensors along the driving direction, and wherein the determining the turn-on timing of the X-ray source specifically comprises: Acquiring the position of a driver in a vehicle head, calculating a safety hysteresis distance based on a preset deflection angle parameter, and generating a cab linear block diagram length containing the position of the driver; Acquiring real-time vehicle speed (V) of the vehicle to be detected and starting delay time (t) of the X-ray source, calculating delay compensation distance of vehicle running during the period from starting to beam-out of the X-ray source ; Calculating a position sensor sequence number (N) for triggering an opening signal, wherein the calculation formula of the sequence number (N) meets the following conditions: Wherein L is the length of the cab wire block, L3 is the distance between the height sensor and the position sensor, and L6 is the spacing of the single position sensor.
6. An adaptive vehicle cold cathode X-ray detection control system, comprising: The triaxial measuring device is arranged at the inlet of the detection channel, is used for collecting the external contour data of the vehicle to be detected and comprises a driver positioning system; A sensor assembly including a height sensor and a plurality of position sensors arranged in a traveling direction for detecting a vehicle position; a cold cathode X-ray source for emitting X-rays to scan the vehicle; The receiving column is arranged on one side of the detection channel opposite to the cold cathode X-ray source and is matched with the cold cathode X-ray source to receive X-ray signals after penetrating through a vehicle; The control system is respectively connected with the triaxial measuring device, the sensor assembly and the cold cathode X-ray source; The control system is used for receiving the external contour data and identifying the type of the vehicle, and matching the voltage level of the X-ray source according to the identified type of the vehicle, wherein different types of the vehicle correspond to different bias voltage modes; The control system is also used for determining the starting time of the X-ray source, responding to the starting time, driving the X-ray source to emit beams according to the matched voltage level, and scanning the vehicle to be detected.
7. The system of claim 6, wherein a light shielding mechanism and a driving device are further arranged at the beam outlet of the cold cathode X-ray source; The control system is also used for calculating a shading adjustment value according to the height data of the vehicle and controlling the driving device to drive the shading mechanism to move so as to change the irradiation range of the X-ray beam.
8. The system of claim 6, further comprising a drive direction mutual inductance device; the travelling direction mutual inductance device comprises a first ground induction coil and a second ground induction coil which are arranged along the travelling direction; the control system judges whether the vehicle is in a forward state or a backward state by monitoring the induction state changes of the first ground induction coil and the second ground induction coil; When the vehicle is judged to be in a forward state, the control system controls the cold cathode X-ray source to be started.
9. An electronic device, the electronic device comprising: One or more processors, and A memory storing computer program instructions that, when executed, cause the processor to perform the steps of the method of any one of claims 1 to 5.
10. A computer program product comprising computer programs/instructions which, when executed by a processor, implement the steps of the method of any one of claims 1 to 5.

Description

Self-adaptive vehicle cold cathode X-ray detection control method, system, equipment and product Technical Field The application relates to the technical field of vehicle security inspection, in particular to a self-adaptive vehicle cold cathode X-ray detection control method, system, equipment and product. Background With the increase of safety requirements, non-invasive vehicle inspection systems based on X-ray imaging technology have been widely used in customs and important facility entrances to replace manual inspection with low efficiency, and become the current mainstream vehicle security inspection means. However, existing vehicle X-ray detection systems still have many limitations in practical applications. First, conventional detection systems mostly employ X-ray beam streams of fixed angle and height, lacking a flexible mechanical avoidance mechanism. Due to the complex types of the past vehicles, the position difference of drivers is huge, and the fixed avoidance strategy is difficult to realize full coverage scanning of cargoes in a carriage while ensuring the radiation safety of the drivers, so that the cargoes are easy to miss detection or personal accidental injury. Secondly, the existing system generally uses an X-ray source with a single voltage level, and penetration parameters cannot be automatically adjusted according to the vehicle type, so that unnecessary radiation and energy consumption are caused when light vehicles are detected, and insufficient penetration force is caused when heavy vehicles are detected, so that the imaging effect is difficult to be considered. In addition, the existing control system often ignores the influence of physical starting delay and vehicle travelling speed existing in the cold cathode X-ray source, so that after a trigger signal is sent out, the actual beam-out position of rays deviates from the expected position, and accurate scanning control cannot be realized. Disclosure of Invention An object of the present application is to provide a method, a system, a device and a product for controlling cold cathode X-ray detection of an adaptive vehicle, which are at least used for solving the technical problem that the radiation safety and the detection effect are difficult to be compatible due to lack of an adaptive adjustment mechanism when the existing vehicle X-ray detection system is used for dealing with complex traffic flow. To achieve the above object, some embodiments of the present application provide the following aspects: the application provides a self-adaptive vehicle cold cathode X-ray detection control method, which comprises the following steps: when a vehicle to be detected enters a detection area, acquiring external contour data of the vehicle to be detected, which is acquired by a triaxial measuring device, wherein the external contour data at least comprises the height of the vehicle from the ground; identifying a vehicle type of the vehicle to be inspected according to the external contour data of the vehicle to be inspected; According to the identified vehicle type, matching the voltage level of the X-ray source, wherein different vehicle types correspond to different bias voltage modes; And determining the starting time of the X-ray source, and responding to the starting time, driving the X-ray source to emit beams according to the matched voltage level, and scanning the vehicle to be detected. In a second aspect, some embodiments of the present application also provide an adaptive vehicle cold cathode X-ray detection control system, the system comprising: The triaxial measuring device is arranged at the inlet of the detection channel, is used for collecting the external contour data of the vehicle to be detected and comprises a driver positioning system; A sensor assembly including a height sensor and a plurality of position sensors arranged in a traveling direction for detecting a vehicle position; a cold cathode X-ray source for emitting X-rays to scan the vehicle; The receiving column is arranged on one side of the detection channel opposite to the cold cathode X-ray source and is matched with the cold cathode X-ray source to receive X-ray signals after penetrating through a vehicle; The control system is respectively connected with the triaxial measuring device, the sensor assembly and the cold cathode X-ray source; The control system is used for receiving the external contour data and identifying the type of the vehicle, and matching the voltage level of the X-ray source according to the identified type of the vehicle, wherein different types of the vehicle correspond to different bias voltage modes; The control system is also used for determining the starting time of the X-ray source, responding to the starting time, driving the X-ray source to emit beams according to the matched voltage level, and scanning the vehicle to be detected. In a third aspect, some embodiments of the application also provide an electronic device compr