CN203204174U

CN203204174U - X-ray duel-energy transmission green channel vehicle detector

Info

Publication number: CN203204174U
Application number: CN201320224856.8U
Authority: CN
Inventors: 奚易堃
Original assignee: BEIJING MANDRAKE ENVIRONMENTAL TECHNOLOGIES Co Ltd
Current assignee: MANDRAKE ENVIRONMENTAL TECHNOLOGIES Ltd
Priority date: 2013-04-27
Filing date: 2013-04-27
Publication date: 2013-09-18
Anticipated expiration: 2023-04-27

Abstract

The utility model relates to an X-ray dual-energy transmission type green channel vehicle detector, which belongs to safety detection equipment for traffic transportation management. The detector should include equipment shielding room, dual-energy ray switching mechanism, transmitted ray solid array receiver, vehicle signal trigger, data acquisition processing and display system, and X-ray source and ray pre-collimator set in the equipment shielding room , high-voltage power supply equipment, X-ray tube cooling system, shielded ray shutter and fan beam collimator; the dual-energy ray switching mechanism is located between the shielded ray shutter and fan beam collimator. The utility model is characterized in that high and low energy X-rays are used to carry out transmission imaging analysis and detection on vehicles passing through the green channel. The detection method of dual-energy rays provides richer and more reliable data for the analysis process and improves the accuracy of detection. It has the advantages of accurate detection information, clear imaging, structured components and easy combination without causing any pollution to the environment.

Description

A kind of X ray dual energy transmission-type green channel Vehicle analyzer

Technical field

The utility model relates to a kind of X ray dual energy transmission-type green channel Vehicle analyzer that utilizes, and belongs to the Non-Destructive Testing special inspecting equipment of traffic and transportation management department.

Background technology

In recent years, along with the execution that country sets up the fresh and alive agricultural byproducts green channel of highway policy, the policy of reducing or remitting the expenses accordingly that various places government is also supporting; But some lawless persons utilize this policy, by load in mixture, false evidence, transfinite, means such as overload, evade the set-fee of country, make highway be subjected to very big economic loss.Therefore green channel vehicle detection instrument arises at the historic moment.Its ultimate principle is utilized X exactly, gamma-ray strong penetration capacity is also adjusted directions of rays by collimating apparatus, collection analysis to transmitted ray is detected have or not personation in the compartment, event such as load in mixture takes place, normally move with the safety of safeguarding green channel, different materials is to the intensity in transmission difference of X ray, the ray of single energy is not high to the testing result resolving effect of different material, and identical material is to the intensity in transmission difference of the X ray of different-energy, use the dual energy detection mode just can remedy the deficiency that single energy detects, provide the better testing result of resolving effect.

The at present domestic product that has two tame technology companys to produce this respect, one is the make the science and technology prosperous TC-SCN green channel vehicle equipment of company limited of Beijing Holley, and another is that Beijing Kai Lihui transport science and techonologies company limited utilizes the backscattering technique of X ray to detect.The both utilizes ray to detect, but all has some defectives and certain limitation.Beijing Holley equipment that company limited produces that makes the science and technology prosperous is to utilize ⁶⁰Co reflectivity isotope exists potential accidental pollution problem and radiographic source to lose problem as radiographic source.And Kai Lihui transport science and techonologies company limited utilizes the backscattering technique of X ray to detect, and can only detect in the compartment near the object situation in the top layer, compartment, can't find out in the compartment object situation than the position, deep.

The utility model content

The purpose of this utility model provides a kind of X ray dual energy transmission-type green channel Vehicle analyzer, makes it guarantee on the one hand to pollute when environment does not have the accident generation, and abundanter reliable data are provided simultaneously, further improves the accuracy rate that detects.

The technical solution of the utility model is as follows:

A kind of X ray dual energy transmission-type green channel Vehicle analyzer, it is characterized in that: this comprises the device mask chamber this detector, dual energy ray switching mechanism, transmitted ray solid array receiver, the signals of vehicles trigger, data acquisition process and display system, and the ray shutter and the fan beam collimator that are arranged on the indoor x-ray source of device mask, ray precollimator, High voltage power supply equipment, X-ray tube cooling system, band shielding; Described dual energy ray switching mechanism is between the ray shutter and fan beam collimator of band shielding; Described device mask chamber is arranged on a side of tested vehicle on the highway; Signals of vehicles trigger 9 is embedded in underground; Described transmitted ray solid array receiver and data acquisition process and display system are arranged on the opposite side of the tested vehicle on the highway; Described signals of vehicles trigger is connected with ray shutter, dual energy ray switching mechanism and the transmitted ray solid array receiver of radiographic source, band shielding respectively by operation circuit; Dual energy ray switching mechanism is two kinds of beams that energy replaces of height with the fan-ray beam cutting, and the ray of two kinds of energy is transported to data acquisition process and display system after being transmitted the reception of ray solid array receiver.

In the technique scheme, described dual energy ray switching mechanism comprises servomotor, cam and copper grating, and the output shaft of described servomotor links to each other with camshaft, and copper grating is arranged on the cam.

Described transmitted ray solid array receiver proper alignment becomes " L " shape, and be fixed on high 4～4.5 meters, wide 3! 3.5 on the installation frame of rice.

The utlity model has following beneficial effect: the utility model selects for use the X ray of higher-energy as radiographic source, the ray of having realized two kinds of energy of height by dual energy ray switching mechanism detects, the detection mode of dual energy ray has improved the accuracy rate that detects for analytic process provides abundanter reliable data.Detect with respect to monoergic, improved the resolving effect that detects; With respect to using radioisotopic detection, can not cause environmental pollution when guaranteeing to have accident to take place.

Description of drawings

Fig. 1 is the structural principle synoptic diagram of the utility model embodiment.

Fig. 2 is the vertical view of Fig. 1.

Fig. 3 is the theory structure synoptic diagram of dual energy ray switching mechanism.

Among the figure: the 1-X radiographic source; 2-ray precollimator; 3-X radiographic source High voltage power supply equipment; 4-X ray tube cooling system; The ray shutter of 5-band shielding; The 6-fan beam collimator; 7-dual energy ray switching mechanism; 8-device mask chamber; The 9-vehicle passes through signal trigger; 10-transmitted ray solid array receiver; 11-data acquisition process and display system; 20-is detected vehicle; 21-dual energy fan-ray beam; 22-height transmissive ray; The copper grating of 31-; The 32-servomotor; The 33-cam; The 34-high-energy ray; The 35-low energy ray; A is tested vehicle direction of relative movement.

Embodiment

Below in conjunction with accompanying drawing theory structure of the present utility model and embodiment are described further.

The structural principle synoptic diagram of a kind of X ray dual energy transmission-type green channel Vehicle analyzer embodiment that Fig. 1 and Fig. 2 provide for the utility model, this comprises device mask chamber 8 this detector, dual energy ray switching mechanism 7, transmitted ray solid array receiver 10, signals of vehicles trigger 9, data acquisition process and display system 11, and be arranged on ray shutter 5 and the fan beam collimator 6 that x-ray source 1, ray precollimator 2, High voltage power supply equipment 3, X-ray tube cooling system 4, band in the device mask chamber 8 shield; Described dual energy ray switching mechanism 7 is between the ray shutter 5 and fan beam collimator 6 of band shielding; Device mask chamber 8 is arranged on a side of detected vehicle 20 on the highway; Signals of vehicles trigger 9 is embedded in underground; Described transmitted ray solid array receiver 10 and data acquisition process and display system 11 are arranged on the opposite side of the detected vehicle on the highway; Signals of vehicles trigger 9 is connected with ray shutter 5, dual energy ray switching mechanism 7 and the transmitted ray solid array receiver 10 of radiographic source 1, band shielding respectively by operation circuit; Dual energy ray switching mechanism is two kinds of beams that energy replaces of height with the fan-ray beam cutting, and the ray of two kinds of energy is transported to data acquisition process and display system after being transmitted 10 receptions of ray solid array receiver.

Triggering radiographic source 1 when detected vehicle 20 passes through signals of vehicles triggers 9 opens High voltage power supply equipment 3 and sends X ray, X ray forms fan-ray beam by fan beam collimator 6 again behind ray precollimator 2, signal variation by signals of vehicles trigger 9 judges that pilothouse crosses the fladellum scanning area, the ray shutter 5 of band shielding this moment is opened and is started dual energy ray switching mechanism 7 and moves, fan-ray beam forms dual energy fan-ray beam 21 through dual energy ray switching mechanism 7 backs, project on the compartment of detected vehicle 20 behind the ray shutter 5 of fan-ray beam by the band shielding, the dual energy ray that penetrates the compartment is transmitted ray solid array receiver 10 and receives, the signal that receiver produces sends into-and data acquisition process and display system 11 handle, obtain two different scanning images that the height energy measuring arrives, demonstrate testing result by the data that compare two scan images; Vehicle triggers radiographic source 1 by signals of vehicles trigger 9 backs and cuts out High voltage power supply equipment 3 end ray outputs, closes the ray shutter 5 of band shielding simultaneously and stops 7 operations of dual energy ray switching mechanism.Owing to use the ray of two kinds of energy of high low energy, can handle the signal that receives by high low energy ray switching frequency synchronously in data acquisition process and the display system 11, thereby the vehicle-mounted item scan perspective view that two width of cloth that obtain high low energy ray detection are different just can find whether to contain in the vehicle hiding violation article and his quantity and weight that can the rough estimate vehicle-mounted cargo by the data among two figure of comparative analysis.Control to radiographic source and ray shutter need add fault alarm detection and manual intervention, in order to can in time cut off radiographic source under unexpected situation, increases security.

Fig. 3 is the theory structure synoptic diagram of dual energy ray switching mechanism 7, and this mechanism comprises servomotor 32, cam 33 and copper grating 31, and the output shaft of described servomotor links to each other with camshaft, and copper grating is arranged on the cam.The switching of height energy-ray is to realize by the very high copper grating of precision; The high voltage x-ray of 450 kilovolts of sending of x-ray source through ray precollimator 2 and-fan beam collimator 6 after, through dual energy ray switching mechanism 7, the ray energy of the slit part of grating remains unchanged, the transmitted intensity that does not directly penetrate copper grating through slit is reduced to the energy of 220 kilovolts of rays, the ray of such two kinds of energy transmission at one time is transmitted 10 receptions of ray solid array receiver after detecting thing, by improving the grating precision ray of two kinds of energy alternately is transmitted on the ray solid array receiver accurately; Constantly move stop position by vertical direction at next, make a ray that sees through slit constantly penetrate copper grating, see through the ray of slit through the grating slit, the ray of two kinds of energy alternately is transmitted on the solid array receiver accurately, position before next moves to grating constantly again, replace so repeatedly, synchronous these two kinds of alternating signals are sampled and processing just can obtain the detection data of two kinds of energy-rays in data acquisition process and display system.

For to the compartment of tested vehicle from doing complete detection to roof at the bottom of the car, do not have omission angle and position, transmitted ray solid array receiver 10 proper alignment become " L " shape, and are fixed on high 4 to 4.5 meters, wide 3 to the 3.5 meters installation frame.

Claims

1. An X-ray dual-energy transmission type green channel vehicle detector, characterized in that: the detector should include an equipment shielding room (8), a dual-energy ray switching mechanism (7), and a transmitted ray solid array receiver (10) , a vehicle signal trigger (9), a data acquisition processing and display system (11), and an X-ray source (1), a ray precollimator (2), and a high-voltage power supply device ( 3), X-ray tube cooling system (4), shielded ray shutter (5) and fan beam collimator (6); the dual-energy ray switching mechanism (7) is located in the shielded ray shutter (5) and between the fan beam collimator (6);

The equipment shielding room is set on the side of the vehicle under inspection on the road; the vehicle signal trigger 9 is buried underground; the transmitted ray solid array receiver (10) and data acquisition processing and display system (11) are set On the other side of the inspected vehicle on the road; the vehicle signal trigger (9) is respectively connected to the radiation source (1), the shielded radiation shutter (5), and the dual-energy radiation switching mechanism (7) through the control circuit It is connected with the transmitted ray solid array receiver (10); the dual-energy ray switching mechanism cuts the fan-shaped ray beam into high and low energy beams alternately, and the rays of the two energies are received by the transmitted ray solid array receiver (10) After that, it is sent to the data acquisition processing and display system.

2. An X-ray dual-energy transmission type green channel vehicle detector according to claim 1, characterized in that: the dual-energy ray switching mechanism (7) includes a servo motor (32), a cam (33) and Copper grating (31), the output shaft of the servo motor is connected with the camshaft, and the copper grating is arranged on the cam.

3. An X-ray dual-energy transmission type green channel vehicle detector as claimed in claim 1, characterized in that: the transmitted ray solid array receivers (10) are neatly arranged in an "L" shape, and fixed at a height of 4~ 4.5 meters wide and 3! 3.5 meters on the installation frame.