A container vehicle head avoidance scanning control method

Abstract

The present invention relates to a container vehicle front avoidance scanning control method, which is applied to a barrier security inspection system. The barrier security inspection system comprises a radiation source chassis and two columns, the two columns are respectively arranged on the left and right sides of the radiation source chassis, the two columns and the radiation source chassis are arranged along a security inspection channel, a vertical beam outlet slot is arranged in the middle of the radiation source chassis, three radars are arranged on the left column, namely a signal preparation radar, an oncoming vehicle chassis sensing radar, and a vehicle rear gap sensing radar, the radar wave direction of the signal preparation radar is tilted from right to left and faces forward, the radar wave direction of the oncoming vehicle chassis sensing radar is tilted from back to front and faces upward, the radar wave direction of the vehicle rear gap sensing radar is tilted from left to right and faces forward, and the intersection of the radar wave direction and the radiation beam outlet direction is at the front edge of the driving path of the security inspection channel, the present invention can maintain the reliability and stability of an X-ray radiation imaging system.

Description

Technical Field

[0001] The present invention relates to the technical field of X-ray radiation imaging safety inspection, and in particular to a method for controlling a container vehicle head-on avoidance scanning. Background Art

[0002] The front-end avoidance X-ray radiation imaging security inspection system is a popular technology in recent years for high-speed through-type security inspection scanning of bulk goods and containers of various specifications and models without unloading. It is used to check whether there are controlled items such as hazardous chemicals and contraband in the goods.

[0003] At present, the industry mainly uses sensors such as grating beams, laser radars, and ground sensing coils to avoid X-ray radiation imaging security scanning of vehicle heads. In actual engineering applications, they have the disadvantages of poor reliability, high installation technology difficulty, and high cost. Affected by the large volume of on-site vehicles, high-speed through-type security scanning is not able to respond to various lengths and models of container vehicles (reference Figure 1 ) and real-time safety inspection, due to the irregular body gaps 11 of container vehicles, it is easy to cause the X-ray radiation imaging scanning signal to be lost or not scanned, or the front of the vehicle avoidance command feedback is too early or too late, resulting in delayed beam emission after the rear of the vehicle completes the scan, resulting in excessive scanning dose and unnecessary radiation pollution to the environment. If multiple sensors are used in combination, the control of the equipment circuit will become complicated and the failure rate will increase. If one sensor does not work properly during scanning, it will affect the stability of the entire X-ray radiation imaging system. Summary of the invention

[0004] The object of the present invention is to provide a container vehicle head avoidance scanning control method, which can maintain the reliability and stability of an X-ray radiation imaging system.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A method for avoiding scanning and controlling the front of a container vehicle is applied to a barrier security inspection system. The barrier security inspection system includes a radiation source chassis, a left column and a right column. The left column and the right column are respectively arranged on the left and right sides of the radiation source chassis. The left column, the right column and the radiation source chassis are arranged along the security inspection channel. A vertical beam outlet slit is arranged in the middle of the radiation source chassis. The vertical beam outlet slit radiates a beam. The left column is provided with three radars, namely, a signal preparation radar, an oncoming vehicle chassis sensing radar, and a rear vehicle gap sensing radar. The radar wave direction of the signal preparation radar is tilted from right to left and faces forward, the radar wave direction of the oncoming vehicle chassis sensing radar is tilted from back to front and faces upward, and the radar wave direction of the rear vehicle gap sensing radar is tilted from left to right and faces forward, and its beam outlet path is aligned with the vertical beam outlet slit radiation beam path. The intersection of the paths is at the front edge of the driving path of the security inspection channel. Three radars are installed on the right column, namely the vehicle head to the gap sensing radar, the vehicle head exit sensing radar and the vehicle head exit keeping scanning radar. The radar wave direction of the vehicle head to the gap sensing radar is tilted from right to left and faces forward, and its intersection with the vertical beam-out gap radiation beam path is at the front edge of the driving path of the security inspection channel. The radar wave direction of the vehicle head exit sensing radar is tilted upward from back to front, and the radar wave direction of the vehicle head exit keeping scanning radar is tilted from left to right and faces forward.

[0007] The container vehicle head avoidance scanning control method comprises the following steps:

[0008] S1: The signal preparation radar continuously sends radar waves. When it senses that a vehicle has entered the security inspection channel, the signal preparation radar feeds back a signal that the radiation source chassis is ready to scan, so that the radiation source chassis enters a state of preparing to scan, but does not emit a beam for scanning;

[0009] S2: The oncoming vehicle chassis sensing radar continuously sends radar waves. When it senses that the front chassis reaches the front side of the left pillar, the oncoming vehicle chassis sensing radar feeds back a signal to the radiation source chassis to confirm the scan, so that the radiation source chassis remains in a state of preparing for scanning, but does not emit a beam for scanning;

[0010] S3: The vehicle head to the gap sensing radar continuously sends radar waves to sense in real time whether the vehicle head reaches the radiation beam path of the vertical beam gap;

[0011] S4: The vehicle front exit sensing radar continuously sends radar waves. When it senses that the vehicle front passes the front side of the right pillar, the vehicle front exit sensing radar feeds back a signal for the radiation source chassis to start scanning, and the radiation source chassis starts to emit beam scanning;

[0012] S5: The vehicle head drives out to keep scanning radar and continuously sends radar waves. When sensing that the vehicle head has passed, the vehicle head drives out to keep scanning radar and feeds back a signal for the radiation source chassis to continue scanning, so that the radiation source chassis continues scanning;

[0013] S6: The rear gap sensing radar continuously sends radar waves. When it senses that the rear of the vehicle has left the radiation beam path of the vertical beam gap, the rear gap sensing radar feeds back a signal for the radiation source chassis to stop scanning, and the radiation source chassis stops beam scanning.

[0014] Specifically, the lateral distance d between the left column / right column and the vertical beam outlet slit is 1.3m-1.8m.

[0015] Specifically, the signal preparation radar is located at a height of 1.15m-1.25m, the rear gap sensing radar is located at a height of 0.95m-1.05m, and the oncoming vehicle chassis sensing radar is located at a height of 0.45m-0.55m.

[0016] Specifically, the height of the vehicle front to gap sensing radar is 0.95m-1.05m, the height of the vehicle front exit sensing radar is 0.45m-0.55m, and the height of the vehicle front exit maintaining scanning radar is 1.15m-1.25m.

[0017] Specifically, the angle between the radar wave direction of the rear gap sensing radar and the driving path of the security inspection channel is 40°-50°.

[0018] Specifically, the angle between the radar wave direction of the vehicle head-to-seam sensing radar and the driving path of the security inspection channel is 40°-50°.

[0019] Specifically, when the front of the vehicle drives out, the angle between the radar wave direction of the scanning radar and the driving path of the security inspection channel is maintained at 40°-50°.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The oncoming vehicle chassis sensing radar and the vehicle front exit sensing radar of the present invention are directed toward the chassis of the vehicle. Even if a small signal fluctuation is generated when scanning a chassis gap of the vehicle chassis, the signal can still be maintained as a whole, and a backup compensation backup signal can be provided to avoid the control process being disturbed by the irregular body gaps of the container vehicle, thereby maintaining the reliability and stability of the X-ray radiation imaging system.

[0022] The signal preparation radar, the oncoming vehicle chassis sensing radar, and the rear gap sensing radar issue beam cut-off instructions at different stages, and the front-to-gap sensing radar, the front-exit sensing radar, and the front-exit scanning radar issue beam start instructions at different stages. The front of container trucks of different lengths and models are scanned to avoid them, and then the scanning instructions are started and maintained for the container parts. This is completed by six radars to ensure the maximum accuracy of judging the position of the front and rear of the vehicle, so as to avoid the driver of the front of the vehicle being exposed to high-energy radiation, and at the same time avoid the rear of the vehicle crossing the radiation beam path and still emitting radiation in vain, causing radiation ionization pollution. In actual application scenarios, if there is a failure of individual radars, the scanning signal can be switched senselessly to maintain the reliability and stability of the X-ray radiation imaging system. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 Schematic diagrams of different types of container vehicles;

[0025] Figure 2 This is a schematic diagram of the barrier security inspection system;

[0026] Figure 3 This is a schematic diagram of the container vehicle inspection process;

[0027] Figure 4 for Figure 3 A partial view of

[0028] Figure 5 The following are the signal waveforms of six radars;

[0029] Figure 6 Schematic diagram of the parallel relationship of six radars.

[0030] In the figure:

[0031] 11. The gap in the body; 12. The gap in the chassis;

[0032] 2. Radiation source chassis; 21. Vertical beam outlet slit;

[0033] 3. Left pillar; 31. Signal preparation radar; 32. Oncoming vehicle chassis sensing radar; 33. Rear gap sensing radar;

[0034] 4. Right pillar; 41. Vehicle front to gap sensing radar; 42. Vehicle front exit sensing radar; 43. Vehicle front exit maintaining scanning radar. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0036] See Figures 1 to 6 A container vehicle head avoidance scanning control method is applied to a barrier security inspection system, which includes a radiation source chassis 2, a left column 3 and a right column 4, and the left column 3 and the right column 4 are respectively arranged on the left and right sides of the radiation source chassis 2. The left column 3, the right column 4 and the radiation source chassis 2 are arranged along the security inspection channel, and a vertical beam outlet slot 21 is provided in the middle of the radiation source chassis 2, and the vertical beam outlet slot 21 radiates the beam.

[0037] The left column 3 is provided with three radars, namely, a signal preparation radar 31, an oncoming vehicle chassis sensing radar 32, and a rear vehicle gap sensing radar 33. The radar wave direction of the signal preparation radar 31 is tilted forward from right to left. The radar wave direction of the oncoming vehicle chassis sensing radar 32 is tilted upward from back to front. The radar wave direction of the rear vehicle gap sensing radar 33 is tilted forward from left to right, and its intersection with the beam radiating path of the vertical beam slit 21 is at the front edge of the driving path of the security inspection channel, so that it can accurately sense whether the rear of the vehicle has left the beam radiating path.

[0038] The right column 4 is provided with three radars, namely, the vehicle head to the gap sensing radar 41, the vehicle head exit sensing radar 42 and the vehicle head exit and keep scanning radar 43. The radar wave direction of the vehicle head to the gap sensing radar 41 is tilted forward from right to left, and its intersection with the beam radiation path of the vertical beam exit gap 21 is at the front edge of the security inspection channel driving path, so that it can accurately sense whether the vehicle head has reached the beam radiation path. The radar wave direction of the vehicle head exit sensing radar 42 is tilted upward from back to front. The radar wave direction of the vehicle head exit and keep scanning radar 43 is tilted forward from left to right.

[0039] The container vehicle head avoidance scanning control method comprises the following steps:

[0040] S1: The signal preparation radar 31 continuously sends radar waves. When it senses that a vehicle enters the security inspection channel, the signal preparation radar 31 feeds back a signal that the radiation source chassis 2 is ready to scan, so that the radiation source chassis 2 enters a state of preparing to scan, but does not emit a beam for scanning;

[0041] S2: the vehicle chassis sensing radar 32 continuously sends radar waves. When it senses that the vehicle chassis reaches the front side of the left pillar 3, the vehicle chassis sensing radar 32 feeds back a signal to the radiation source chassis 2 to confirm the scan, so that the radiation source chassis 2 remains in a state of preparing for scanning, but does not emit a beam for scanning;

[0042] S3: The vehicle head to the gap sensing radar 41 continuously sends radar waves to sense in real time whether the vehicle head reaches the radiation beam path of the vertical beam gap 21;

[0043] S4: The vehicle head exit sensing radar 42 continues to send radar waves, and when it senses that the vehicle head has passed the front side of the right pillar 4 (such as Figure 4 As shown), the vehicle leaves the sensing radar 42 and feeds back a signal from the radiation source chassis 2 to start scanning, and the radiation source chassis 2 starts to emit a beam for scanning;

[0044] S5: The vehicle head drives out and the scanning radar 43 continues to send radar waves. When sensing that the vehicle head has passed, the vehicle head drives out and the scanning radar 43 feeds back a signal for the radiation source chassis 2 to continue scanning, so that the radiation source chassis 2 continues scanning;

[0045] S6: The rear gap sensing radar 33 continuously transmits radar waves. When it senses that the rear of the vehicle has left the radiation beam path of the vertical beam output gap 21, the rear gap sensing radar 33 feeds back a signal for the radiation source chassis 2 to stop scanning, and the radiation source chassis 2 stops beam output scanning.

[0046] Specifically, the lateral distance d between the left column 3 / the right column 4 and the vertical beam outlet slit 21 is 1.3 m-1.8 m.

[0047] Specifically, the signal preparation radar 31 is located at a height of 1.15m-1.25m, the rear gap sensing radar 33 is located at a height of 0.95m-1.05m, and the oncoming vehicle chassis sensing radar 32 is located at a height of 0.45m-0.55m.

[0048] Specifically, the height of the vehicle head-to-gap sensing radar 41 is 0.95m-1.05m, the height of the vehicle head-out sensing radar 42 is 0.45m-0.55m, and the height of the vehicle head-out holding scanning radar 43 is 1.15m-1.25m.

[0049] Specifically, the angle between the radar wave direction of the rear gap sensing radar 33 and the driving path of the security inspection channel is 40°-50°.

[0050] Specifically, the angle between the radar wave direction of the vehicle head-to-seam sensing radar 41 and the driving path of the security inspection channel is 40°-50°.

[0051] Specifically, when the front of the vehicle drives out, the angle between the radar wave direction of the scanning radar 43 and the driving path of the security inspection channel is maintained at 40°-50°.

[0052] The working principle of the container vehicle head avoidance scanning control method of the present invention is as follows:

[0053] by Figure 1 For example, when a container vehicle at the top enters the security inspection channel, its front end will first be sensed by the signal preparation radar 31. When the signal preparation radar 31 senses that the front end of the vehicle has entered the security inspection channel, the signal preparation radar 31 feeds back a signal that the radiation source chassis 2 is ready to scan, so that the radiation source chassis 2 enters a state of preparing to scan, but does not emit a beam for scanning;

[0054] When the chassis sensing radar 32 of the approaching vehicle senses that the chassis of the vehicle reaches the front side of the left pillar 3, the chassis sensing radar 32 of the approaching vehicle feeds back a signal confirming the scan to the radiation source chassis 2, so that the radiation source chassis 2 remains in a state of preparing for scanning, but does not emit a beam for scanning;

[0055] The vehicle head to gap sensing radar 41 continuously sends radar waves to sense in real time whether the vehicle head reaches the radiation beam path of the vertical beam gap 21;

[0056] When the vehicle head exit sensing radar 42 senses that the vehicle head passes the front side of the right pillar 4 (such as Figure 4 As shown), the cab of the front of the vehicle has crossed the radiation beam path. The front of the vehicle driving out sensing radar 42 feeds back a signal that the radiation source chassis 2 starts scanning, and the radiation source chassis 2 starts beam scanning;

[0057] When the vehicle head exits and the scanning radar 43 senses that the vehicle head has passed, the scanning radar 43 feeds back a signal for the radiation source chassis 2 to keep scanning, so that the radiation source chassis 2 keeps scanning, so as to avoid being disturbed by the difference in the shape of the vehicle body (such as the empty space 11 of the vehicle body) and interrupting the scanning;

[0058] When the rear gap sensing radar 33 senses that the rear of the vehicle has left the radiation beam path of the vertical beam gap 21, the rear gap sensing radar 33 feeds back a signal to the radiation source chassis 2 to stop scanning, and the radiation source chassis 2 stops beam scanning to avoid empty radiation beam discharge and cause radiation ionization pollution.

[0059] The oncoming vehicle chassis sensing radar 32 and the vehicle front exit sensing radar 42 of the present invention are directed toward the chassis of the vehicle. Even if a chassis gap 12 of the vehicle chassis is scanned and a slight signal fluctuation is generated, the signal can still be maintained as a whole, and a backup compensation backup signal can be provided to avoid the control process being interfered by the irregular body gap 11 of the container vehicle, thereby maintaining the reliability and stability of the X-ray radiation imaging system.

[0060] The signal preparation radar 31, the oncoming vehicle chassis sensing radar 32, and the rear gap sensing radar 33 issue beam cut-off instructions at different stages, and the front-to-gap sensing radar 41, the front-exit sensing radar 42, and the front-exit scanning radar 43 issue beam start instructions at different stages. The front of container trucks of different lengths and models are cut off for avoidance, and then the scanning instructions are started and maintained for the container part. This is completed by six radars to ensure the maximum accuracy of judging the position of the front and rear of the vehicle, so as to avoid the driver of the front of the vehicle being exposed to high-energy radiation, and at the same time avoid the rear of the vehicle crossing the radiation beam path and still emitting radiation in vain, causing radiation ionization pollution. In actual application scenarios, if there is a failure of individual radars, the scanning signal can be switched senselessly to maintain the reliability and stability of the X-ray radiation imaging system.

[0061] The above are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Although the present invention has been disclosed as above in the form of preferred embodiments, it is not intended to limit the present invention. Any technical personnel in the field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A container vehicle front avoidance scanning control method, applied to a barrier security inspection system, the barrier security inspection system comprising a radiation source chassis (2), a left column (3) and a right column (4), the left column (3) and the right column (4) being respectively arranged on the left and right sides of the radiation source chassis (2), the left column (3), the right column (4) and the radiation source chassis (2) being arranged along a security inspection passage, a vertical beam outlet slit (21) being arranged in the middle of the radiation source chassis (2), the vertical beam outlet slit (21) radiating an outlet beam, the left column (3) being arranged with three radars, namely a signal preparation radar (31), an oncoming vehicle chassis sensing radar (32), and a vehicle rear end gap sensing radar (33), the radar wave direction of the signal preparation radar (31) being inclined from right to left and facing forward, the radar wave direction of the oncoming vehicle chassis sensing radar (32) being inclined from right to left and facing forward The radar wave direction of the rear end gap sensing radar (33) is tilted from left to right and faces forward, and the intersection of the radar wave direction with the vertical beam exiting gap (21) radiation beam path is at the front edge of the security inspection channel driving path. The right column (4) is provided with three radars, namely, the front end gap sensing radar (41), the front end exit sensing radar (42) and the front end exit scanning radar (43). The radar wave direction of the front end gap sensing radar (41) is tilted from right to left and faces forward, and the intersection of the radar wave direction with the vertical beam exiting gap (21) radiation beam path is at the front edge of the security inspection channel driving path. The radar wave direction of the front end exit sensing radar (42) is tilted from right to left and faces forward, and the radar wave direction of the front end exit scanning radar (43) is tilted from left to right and faces forward. The invention is characterized in that: The container vehicle head avoidance scanning control method comprises the following steps: S1: The signal preparation radar (31) continuously sends radar waves. When it senses that a vehicle has entered the security inspection channel, the signal preparation radar (31) feeds back a signal that the radiation source chassis (2) is ready to scan, so that the radiation source chassis (2) enters a state of being ready to scan, but does not emit a beam for scanning; S2: the oncoming vehicle chassis sensing radar (32) continuously transmits radar waves. When it senses that the front chassis of the vehicle has reached the front side of the left pillar (3), the oncoming vehicle chassis sensing radar (32) feeds back a signal confirming the scan to the radiation source chassis (2), so that the radiation source chassis (2) remains in a state ready for scanning, but does not emit a beam for scanning; S3: The vehicle head to gap sensing radar (41) continuously transmits radar waves to sense in real time whether the vehicle head reaches the radiation beam path of the vertical beam gap (21); S4: the vehicle front exit sensing radar (42) continuously transmits radar waves. When it senses that the vehicle front has passed the front side of the right pillar (4), the vehicle front exit sensing radar (42) feeds back a signal for the radiation source chassis (2) to start scanning, and the radiation source chassis (2) starts beam scanning; S5: The vehicle head moves out and the scanning radar (43) continues to send radar waves. When the vehicle head is sensed to pass by, the vehicle head moves out and the scanning radar (43) feeds back a signal for the radiation source chassis (2) to continue scanning, so that the radiation source chassis (2) continues scanning; S6: The rear gap sensing radar (33) continuously transmits radar waves. When it senses that the rear of the vehicle has left the radiation beam path of the vertical beam output gap (21), the rear gap sensing radar (33) feeds back a signal for the radiation source chassis (2) to stop scanning, and the radiation source chassis (2) stops beam output scanning.

2. The container vehicle head avoidance scanning control method according to claim 1, characterized in that: The lateral distance between the left column (3) and the vertical beam outlet slit (21) is d, and the lateral distance between the right column (4) and the vertical beam outlet slit (21) is also d, and d is 1.3m-1.8m.

3. The container vehicle head avoidance scanning control method according to claim 1, characterized in that: The signal preparation radar (31) is located at a height of 1.15m-1.25m, the rear gap sensing radar (33) is located at a height of 0.95m-1.05m, and the oncoming vehicle chassis sensing radar (32) is located at a height of 0.45m-0.55m.

4. The container vehicle head avoidance scanning control method according to claim 1, characterized in that: The height of the vehicle head-to-seam sensing radar (41) is 0.95m-1.05m, the height of the vehicle head-out sensing radar (42) is 0.45m-0.55m, and the height of the vehicle head-out keeping scanning radar (43) is 1.15m-1.25m.

5. The container vehicle head avoidance scanning control method according to claim 1, characterized in that: The angle between the radar wave direction of the rear vehicle gap sensing radar (33) and the vehicle path of the security inspection channel is 40°-50°.

6. The container vehicle head avoidance scanning control method according to claim 1, characterized in that: The angle between the radar wave direction of the vehicle head-to-seam sensing radar (41) and the driving path of the security inspection channel is 40°-50°.

7. The container vehicle head avoidance scanning control method according to claim 1, characterized in that: When the vehicle head drives out, the angle between the radar wave direction of the scanning radar (43) and the driving path of the security inspection channel is kept at 40°-50°.

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