CN106093087B - Fixed transmission radiation imaging vehicle self-dragging scanning system - Google Patents
Fixed transmission radiation imaging vehicle self-dragging scanning system Download PDFInfo
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- CN106093087B CN106093087B CN201610681605.0A CN201610681605A CN106093087B CN 106093087 B CN106093087 B CN 106093087B CN 201610681605 A CN201610681605 A CN 201610681605A CN 106093087 B CN106093087 B CN 106093087B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
- G01N23/04—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material
Abstract
The invention discloses a fixed transmission radiation imaging vehicle self-dragging scanning system, which comprises: the system comprises: a fixed transmission detection system, wherein an inclined ramp is arranged at the vehicle entering side of the transmission detection system, and a vehicle release device is arranged on the ramp; the vehicle slides along the ramp by itself under the action of gravity, and the detection is finished by the transmission detection system at a preset speed by controlling the inclination angle and/or the sliding length of the ramp. The invention avoids the irradiation of the driver due to the vehicle-mounted detection, has high passing efficiency and convenient and fast equipment maintenance.
Description
Technical Field
The invention relates to the field of digital radiation scanning imaging, in particular to a fixed transmission radiation imaging vehicle self-dragging scanning system.
Background
For security inspection against smuggling and anti-terrorism activities, it is necessary to enhance security inspection of freight vehicles, small vehicles and freight bags, such as inspection equipment such as bag security inspection systems, large container/vehicle security inspection systems, and small vehicle security inspection systems.
The detection systems adopt a ray transmission imaging principle to carry out detection, and comprise a ray source device, an array detector system, a dragging scanning system, an image display analysis system and the like. The ray emitted by the ray source is collimated into a sheet-shaped ray beam, the ray enters the array detector after passing through the object to be detected, the thickness information of the mass of the substance on the ray passing path at different positions is reflected by the array detector at the different positions, the larger the mass thickness of the substance is, the more the ray is attenuated, the smaller the signal entering the detector is, the mass thickness information of the substance on one line at different positions of the object can be obtained, and then the two-dimensional transmission ray image of the object to be detected is obtained through the relative movement of the object to be detected and the detection system.
In the above-mentioned detection systems, the object to be inspected and the detection system are required to be relatively moved for scanning. The detection system is fixed in the luggage system, and the detected luggage passes through the detection system by virtue of the conveyor belt; in a large container/vehicle inspection system, side-view transmission imaging inspection is generally performed, a detection portal of a fixed inspection system is fixed, a detected vehicle needs to be placed on a trailer and dragged by the trailer to pass through the detection system, the fixed accelerator type customs container inspection system of the same Fanwei adopts a three-trailer circulating dragging inspection mode (refer to a patent No. ZL 95219336.1), the fixed cobalt-60 customs container inspection system of Beijing Hualixing company adopts a single-vehicle reciprocating dragging inspection mode, the dragging system needs to bear the dragging scanning of the whole truck, and the system is heavy and complex; a combined moving container/vehicle inspection system was developed, in which the inspected vehicle is stationary, the inspection system is mounted on a gantry, the gantry can scan the entire vehicle by reciprocating on a track (see patent ZL 02256759.3), and the inspection system is much lighter than the entire truck by dragging, so that the inspection system is more portable, and the inspection efficiency is improved by detecting the reciprocating scanning of the gantry, and the inspection system in this way becomes the mainstream product. For the safety inspection of small vehicles, the best imaging mode is vertical transmission imaging, and the visual inspection effect is the best and is also approved by users (refer to patent No. 200810119664.4). There are two main types of towing (see 201410770684.3 and 201410770684.3) that involve placing the vehicle on a flat bed supported by rollers beneath which the flat bed is towed through the inspection system, and placing the vehicle on tracks, similar to a flat elevator, that tow the vehicle through the inspection system. In the former dragging mode, the image for dragging the flat plate is added in the image, and in addition, the flat plate needs to be dragged back to carry out the next inspection, so that the inspection efficiency is not high; the latter dragging mode needs to pass through the detection system, so that the dragging system needs to be butted at two sides of the detection system, the structure is complex, and in addition, the stable and reliable operation of the dragging system is influenced by the weight change of the detected vehicle.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a fixed transmission radiation imaging vehicle automatic dragging scanning system which has more stable and reliable performance, low cost and easy system maintenance, different from the dragging mode of the fixed type and combined movable type inspection systems of the container trucks and the dragging mode of the existing small vehicle safety inspection systems, the existing dragging systems have the defects that the vehicles are fixed in the detection process, the dragging mode provided by the invention depends on the rolling of the wheels of the vehicle through the checking system in the detection process, the vehicle body passes through the checking system relatively stably in the detection process, the image quality of the wheel rotation detection method is consistent with that of the existing detection method, but the wheel rotation has certain influence on the image at the wheel, but the wheel is circularly symmetric, and the influence on the image in the rotation process is limited. The vehicle dragging mechanism is mainly installed on one side of the detection system, and does not interfere with the detection system during maintenance.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a stationary, transmissive radiation imaging, vehicular self-propelled scanning system, the system comprising: a fixed transmission detection system, wherein an inclined ramp is arranged at the vehicle entering side of the transmission detection system, and a vehicle release device is arranged on the ramp; the vehicle slides along the ramp by itself under the action of gravity, and the detection is finished by the transmission detection system at a preset speed by controlling the inclination angle and/or the sliding length of the ramp.
Further, the inclination angle of the ramp is fixed, the starting point position of the sliding is selected according to the self weight of the vehicle, and the vehicle has enough sliding distance to ensure the speed of the vehicle when the vehicle passes through the transmission detection system.
Further, the starting point position of the vehicle on the slide way is fixed, and the inclination angle of the ramp can be adjusted.
Furthermore, one end of the ramp, which is close to the transmission detection system, is hinged to the ground foundation, the ramp can rotate up and down along the hinged shaft, and a lifting device for controlling the inclination angle of the ramp is connected to the ramp.
Further, the lifting device is a piston cylinder or an electric push rod arranged below the ramp.
Furthermore, a plurality of speed measuring devices are arranged on the ramp along the sliding direction of the vehicle, and the lifting device adjusts the inclination angle of the ramp in the descending process of the vehicle according to the speed of the vehicle measured by the speed measuring devices.
Furthermore, a wheel guide rail is arranged on the ramp, the wheel guide rail is composed of a plurality of unit sections along the sliding direction of the vehicle, and a gap is reserved between two adjacent wheel guide rails.
Further, the wheel rail includes: the vehicle wheel track comprises a single-side wheel track groove, double-side wheel track grooves and a whole vehicle track groove, wherein the width of the single-side wheel track groove and the double-side wheel track grooves is 1.5-3 times of the width of a vehicle wheel, and the height range of the grooves is 3cm-15 cm; the groove width of the whole vehicle guide rail groove is 1.2-2 times of the vehicle width, and the groove height range is 3-20 cm.
Furthermore, the groove bottom of the inner side of the wheel guide rail groove is connected with the groove wall through a smooth curved surface.
Further, a vehicle deceleration device is provided on the vehicle exit side of the transmission detection system.
The invention is particularly suitable for the vertical perspective inspection of the small vehicle, the weight range of the small vehicle is generally less than 4 tons, the width is less than 2.2 meters, the length is less than 6 meters, the size of the ramp is not required to be large, the inclination angle of the ramp is easy to adjust, the ramp only rotates in a certain range, and the movement mode is simple; the ramp is only required to be installed on one side of the detection system, so that the cost of the dragging system can be greatly reduced, the running reliability of the system is improved, and the detection system and the ramp can be conveniently maintained independently; however, in order to ensure the safety of the system, a braking device needs to be arranged at the detection starting position and the detection ending position to ensure the safety of getting on and off the vehicle by a driver; mounting the wheel guide rail to ensure that the wheels of the vehicle roll in the predicted track; the speed measuring device is installed, so that the system can conveniently adjust the passing speed of the vehicle.
Drawings
FIG. 1 is a schematic diagram of a scanning system according to a first embodiment of the present invention;
FIG. 2 is a schematic view of ramp number 3 of FIG. 1 after the ramp has been inclined;
FIG. 3 is a top view of FIG. 1;
FIG. 4 is a cross-sectional view of a single-sided slot in the double-sided wheel-guide-track slot numbered 5 in FIG. 1;
FIG. 5 is a schematic diagram of a scanning system according to a second embodiment of the present invention;
FIG. 6 is a schematic diagram of a scanning system according to a third embodiment of the present invention;
FIG. 7 is a schematic diagram of a scanning system according to a fourth embodiment of the present invention;
fig. 8 is a schematic structural diagram of a scanning system according to a fifth embodiment of the present invention.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings.
Example 1
The stationary transmitted radiation imaging vehicular self-propelled scanning system shown in fig. 1, 2, 3 and 4 comprises: the fixed transmission detection system comprises a frame-shaped scanning device 1 and an imaging device, wherein the scanning device 1 is fixed on a ground foundation 2, and a vehicle passes through the scanning device 1 to form a perspective image of the vehicle on the imaging device.
A ramp 3 is arranged at the vehicle entering side of the transmission detection system, more specifically, the vehicle entering side of a scanning device 1, the ramp 3 is movable, one end of the ramp 3 close to the scanning device 1 is hinged on a ground base 2 through a hinge shaft 4, the other end of the ramp 3 opposite to the hinge shaft 4 can rotate up and down, so that the inclination angle of the ramp 3 relative to the horizontal plane is changed, a hydraulic cylinder 6 is arranged below the ramp 3, the hydraulic cylinder 6 pushes the ramp 3 to control the lifting of the ramp, and of course, other lifting devices can be adopted to realize the lifting of the ramp 3, such as an electric push rod or a chain wheel mechanism.
The ramp 3 is provided with bilateral wheel guide rail grooves 5, the bilateral wheel guide rail grooves 5 correspond to wheels on the left side and the right side of the vehicle, the bilateral wheel guide rail grooves 5 are composed of a plurality of sections in the length direction, and a gap is reserved between two adjacent sections of bilateral wheel guide rail grooves 5, so that rays can pass through the gaps and the rails can move relatively between different sections. The groove width of the double-side wheel guide rail groove 5 is 1.5-3 times of the wheel width, the groove height range is 3cm-15cm, and the groove bottom 52 and the groove wall 51 on the inner side of the groove are connected through the smooth curved surface 53, so that the direction of the wheel is properly adjusted after the wheel deviates, and the vehicle is prevented from stopping midway during detection.
The two-side wheel guide rail groove 5 is provided with a stop block 8 for stopping the wheel travelling channel, the stop block 8 is used as a vehicle release device, the triggered rear stop block 8 can be hidden downwards, and the vehicle can slide downwards freely. The speed measuring devices are arranged in the length direction of the guide rail grooves 5 of the two side wheels, the speed measuring devices are used for monitoring the instant speed of the vehicle when the vehicle passes through, the speed measuring devices are connected with the control system, the hydraulic cylinder 6 serving as the lifting device is also connected with the control system, the instant speed of the vehicle is measured according to the speed measuring devices, the control system controls the extension degree of a piston rod of the hydraulic cylinder 6, so that the inclination angle of a ramp can be adjusted in time in the descending process of the vehicle, and the vehicle can pass through the scanning device 1 according to the preset speed. The self-moving speed range of the vehicle is 3 m/min-30 m/min, the vehicle speed can be adjusted by changing the angle of the ramp 3 through the lifting height, and the vehicle can automatically decelerate on a horizontal road after leaving the ramp 3.
A vehicle deceleration device, which is preferably a deceleration strip 7 in the present embodiment, is provided on the vehicle exit side of the transmission detection system.
When the vehicle is used, the ramp 3 is horizontally arranged on the ground foundation 2, a vehicle is driven into the ramp 3, wheels are driven into the guide rail grooves 5 of the two side wheels, the stop blocks 8 stand and block in front of the wheels, the vehicle is flamed out and is in a neutral position and can not be braked after being straightened, and then a driver gets off the vehicle and leaves; adjusting the inclination angle of the ramp 3, triggering the stop block 8 to release the vehicle, enabling the vehicle to descend by means of self gravity inertia, and adjusting the inclination angle of the ramp 3 under the feedback of the speed measuring device by the ramp 3 in the descending process to enable the vehicle to pass through the scanning device 1 at a preset speed; and the vehicle is stopped stably under the action of the deceleration strip 7 after passing, and the whole transmission detection process is completed. The driver is prevented from being irradiated by radiation due to vehicle-mounted detection, the passing efficiency is high, and the equipment maintenance is convenient.
Example 2
The second embodiment of the present invention shown in fig. 5 has substantially the same structure as that of example 1, except that the wheel track is a one-sided wheel guide groove 5 ', the one-sided wheel guide groove 5 ' is provided with a guide groove only under one-sided wheels of the vehicle, and the cross-sectional structure of the one-sided wheel guide groove 5 ' is shown in fig. 4.
Example 3
The third embodiment of the present invention shown in fig. 6 has substantially the same structure as that of example 1, except that the wheel track is a vehicle track groove 5 ", the groove width of the vehicle track groove 5" is 1.2-2 times the vehicle width, the groove height is in the range of 3-20 cm, and the cross-sectional structure thereof is shown in fig. 4.
Example 4
The fourth embodiment of the present invention shown in fig. 7 is basically the same as the embodiment 1 except that the vehicle speed reducing device is a step gradual slope structure 7 ', each step gradual slope structure 7' enables the vehicle passing speed to change by less than 10%, and the design can also ensure that the vehicle rolls backward after the detection end position is blocked.
Example 5
The fourth embodiment of the invention shown in fig. 8 is basically the same as the embodiment 1, except that the inclined angle of the ramp 3 ' is fixed, the sliding distance of the vehicle on the ramp 3 ' is determined according to the self weight of the vehicle and the inclined angle of the ramp 3 ', namely the starting point of the vehicle is determined, a vehicle releasing device is arranged at the starting point, the vehicle releasing device is detachable and can be fixed on the ramp 3 ' according to the requirement of the sliding length, or a plurality of vehicle releasing devices are arranged on the ramp 3 ', and the vehicle releasing device matched with the vehicle releasing device is selected for use according to the requirement of the sliding length.
The above examples are only for illustrating the present invention, and the embodiments of the present invention are not limited to these examples, and various embodiments made by those skilled in the art in conformity with the idea of the present invention are within the scope of the present invention.
Claims (6)
1. A stationary, transmissive radiation imaging, vehicular self-propelled scanning system, comprising: a fixed transmission detection system, wherein an inclined ramp is arranged at the vehicle entering side of the transmission detection system, and a vehicle release device is arranged on the ramp; the vehicle slides along the ramp by self under the action of gravity, the detection of the vehicle is completed by the transmission detection system at a preset speed by controlling the inclination angle of the ramp, the starting point position of the vehicle on the ramp is fixed, the inclination angle of the ramp can be adjusted, a plurality of speed measuring devices are arranged on the ramp along the sliding direction of the vehicle, the inclination angle of the ramp is adjusted by a lifting device according to the speed of the vehicle measured by the speed measuring devices in the descending process of the vehicle, wheel guide rails are arranged on the ramp, the wheel guide rails are composed of a plurality of sections along the sliding direction of the vehicle, and gaps are reserved between the two adjacent wheel guide rails.
2. The scanning system of claim 1 wherein the end of the ramp near the transmission detection system is hinged to the ground base, the ramp can rotate up and down along the hinge shaft, and the ramp is connected with the lifting device for controlling the inclination angle.
3. The scanning system of claim 2 wherein the elevating means is a piston cylinder or an electric ram disposed below the ramp.
4. The scanning system of claim 1, wherein the wheel rail comprises: the vehicle wheel track comprises a single-side wheel track groove, double-side wheel track grooves and a whole vehicle track groove, wherein the width of the single-side wheel track groove and the double-side wheel track grooves is 1.5-3 times of the width of a vehicle wheel, and the height range of the grooves is 3cm-15 cm; the groove width of the whole vehicle guide rail groove is 1.2-2 times of the vehicle width, and the groove height range is 3-20 cm.
5. The scanning system of claim 4, wherein the groove bottom and the groove wall inside the wheel guide groove are connected by a smooth curved surface.
6. The scanning system according to claim 1, wherein a vehicle deceleration device is provided on a vehicle-exit side of the transmission detection system.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610681605.0A CN106093087B (en) | 2016-08-18 | 2016-08-18 | Fixed transmission radiation imaging vehicle self-dragging scanning system |
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| CN201610681605.0A CN106093087B (en) | 2016-08-18 | 2016-08-18 | Fixed transmission radiation imaging vehicle self-dragging scanning system |
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| CN106093087A CN106093087A (en) | 2016-11-09 |
| CN106093087B true CN106093087B (en) | 2020-10-27 |
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| US4486006A (en) * | 1980-10-01 | 1984-12-04 | Fawdry John A | Self-levelling vehicle support arrangement |
| US5693872A (en) * | 1995-04-25 | 1997-12-02 | Quinn; Stephen Joseph | Method and apparatus for testing preconditioned vehicle exhaust emission |
| CN102483383A (en) * | 2009-07-29 | 2012-05-30 | 美国科技工程公司 | Top-down X-ray inspection trailer |
| CN202947978U (en) * | 2012-11-06 | 2013-05-22 | 信阳同合车轮有限公司 | Continuous detecting and real-time imaging device for X-ray crack detection |
| JP2014219267A (en) * | 2013-05-08 | 2014-11-20 | 株式会社 システムスクエア | X-ray inspection device |
| CN205941409U (en) * | 2016-08-18 | 2017-02-08 | 清华大学 | Fixed transmission radiation imaging's vehicle drags scanning system by oneself |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202921574U (en) * | 2012-10-23 | 2013-05-08 | 北京中天荣泰科技发展有限公司 | Automatic vision detection system for lithium battery pole piece |
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- 2016-08-18 CN CN201610681605.0A patent/CN106093087B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4486006A (en) * | 1980-10-01 | 1984-12-04 | Fawdry John A | Self-levelling vehicle support arrangement |
| US5693872A (en) * | 1995-04-25 | 1997-12-02 | Quinn; Stephen Joseph | Method and apparatus for testing preconditioned vehicle exhaust emission |
| CN102483383A (en) * | 2009-07-29 | 2012-05-30 | 美国科技工程公司 | Top-down X-ray inspection trailer |
| CN202947978U (en) * | 2012-11-06 | 2013-05-22 | 信阳同合车轮有限公司 | Continuous detecting and real-time imaging device for X-ray crack detection |
| JP2014219267A (en) * | 2013-05-08 | 2014-11-20 | 株式会社 システムスクエア | X-ray inspection device |
| CN205941409U (en) * | 2016-08-18 | 2017-02-08 | 清华大学 | Fixed transmission radiation imaging's vehicle drags scanning system by oneself |
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