WO2009155737A1

WO2009155737A1 - Safety check portal for checking a narcotic/explosive and a nuclear/radioactive substance

Info

Publication number: WO2009155737A1
Application number: PCT/CN2008/002056
Authority: WO
Inventors: 胡海峰; 陈志强; 李元景; 林津; 殷晓体; 宋李卫; 彭华; 张清军; 张金宇; 张仲夏; 张阳天
Original assignee: 同方威视技术股份有限公司
Priority date: 2008-06-27
Filing date: 2008-12-24
Publication date: 2009-12-30
Also published as: HK1140013A1; CN101614682A; CN101614682B

Abstract

A safety check portal for checking a narcotic/explosive and a nuclear/radioactive substance comprises a narcotic/explosive checking subsystem and a nuclear/radioactive substance checking subsystem as well as a control and analysis subsystem, the three subsystems are mounted in the housing of the check portal (29) jointly. Besides, the safety check portal (29) further comprises an isolation apparatus (19), which is used for isolating the narcotic/explosive checking subsystem from the nuclear/radioactive substance checking subsystem, thereby allowing them working independently, without interfering with each other.

Description

Technical field

The present invention relates to a security inspection door, and more particularly to a security inspection door capable of simultaneously detecting drugs/explosives and special nuclear materials/radioactive materials. Background technique

Since the "911" incident, anti-terrorism has become a common topic on a global scale. The United States, Russia, the United Kingdom, Egypt, Spain, Indonesia, India and other countries have had terrorist incidents. The United States has also launched two wars. The use of "human bomb" attacks by terrorists has become an important form of destruction, posing a huge threat to the safe life of the people and the stability of society. However, the safety gates currently on the market for pedestrian inspection generally only detect magnetic metals and are incapable of acting on non-magnetic objects. Explosives, drugs, and radioactive materials that can make dirty bombs are some non-magnetic substances, and ordinary security doors are unrecognizable. This is a major loophole for security inspections.

With the development of drug/explosive (IMS) technology, it has become possible to detect suspected particles such as drugs and explosives carried by pedestrians. In recent years, foreign experts have done a lot of research on the door-type pedestrian inspection technology using IMS technology, and applied for a number of patents. Such as: EP1286151A1, US5915268A1, US6073499A1 and

US2001049926A1 and the like. In these patents, in order to facilitate the collection of airflow, various door structures have been proposed; in order to improve the collection efficiency, some pre-concentration ideas have been proposed (such as US6073499A1, etc.); in order to blow suspicious particles in human clothes, start from Pedestrians who are inspected with continuous airflow (eg

US2001049926A1), developed to add a high-pressure gas jet nozzle to blow clothes, blow air flow and nozzle jet direction, or upward, or downward, have tried various methods (such as EP1286151A1, US5915268A1 and US6073499A1).

In the detection of special nuclear materials and radioactive materials, the patent CN02289591.4 proposes a gate type gamma radioactive safety detection device, which adopts directional shielding for the Nal(Tl) scintillator measuring gamma radioactivity, so that only one side of the scintillator is The gamma radioactivity in a solid angle range can be detected; and a plurality of gamma probes are arranged in the door frame-like side door posts, thereby improving the detection efficiency of radioactive materials. Patent US2006/028494 A1 also proposes a radioactive safety detection gate that uses multiple detectors and collimator arrays to achieve simultaneous detection of gamma and eta.

However, due to various reasons, especially the interference between systems, there is no device on the market for simultaneous detection of drugs/explosive substances and special nuclear/radioactive materials. Summary of the invention

The present invention is to solve the above problems in the prior art, and the interference between the drug/explosive substance detecting subsystem and the special nuclear material/radioactive substance detecting subsystem installed together is well prevented by using the isolation measure. Therefore, the inspection efficiency is improved while ensuring the reliability and accuracy of the inspection.

According to the present invention, there is provided a security inspection door comprising a drug/explosives detection subsystem and a special nuclear/radioactive substance detection subsystem and a control analysis subsystem, the three subsystems being jointly installed in the inspection door housing The safety inspection door is further provided with an isolating device for isolating the drug/explosive substance detecting subsystem and the special nuclear material/radioactive substance detecting subsystem from each other so as to work independently without interference. .

The isolation device includes a filter, a decoupler, and an opto-isolator disposed on a signal line, a power line, and a ground line of a special nuclear/radioactive substance detection subsystem and/or a drug/explosive substance detection subsystem.

The isolation device may further comprise a shield made of a shielding material disposed on the radiation detector and the preamplifier in the special nuclear/radioactivity detection subsystem.

Preferably, the security inspection door may further comprise a collimator mounted to the radiation detector in the special nuclear matter/radioactivity detection subsystem to adjust the detection range of the radiation detector.

Other objects and advantages of the present invention will become more apparent from the detailed description of embodiments. DRAWINGS

1 is a perspective view showing the overall configuration of a security inspection door according to the present invention;

Figure 2 is a cross-sectional view of the security inspection door according to the present invention as shown in Figure 1, schematically showing the internal configuration of the security inspection door;

Figure 3 is a partial perspective view of a security inspection door in accordance with the present invention, specifically showing the arrangement of the air nozzle of the drug/explosive detection subsystem;

Figure 4 specifically shows the orientation of a plurality of air nozzles on the same layer;

Figure 5 shows the arrangement of the air knife on the top wall of the security inspection door and the collimator and the radiation detector on the side according to the invention. detailed description Figure 1 shows the overall construction of a security inspection door in accordance with the present invention. As shown in Fig. 1, an outer casing 3, an exhaust port 14, a user terminal 24, an indicator lamp 25, and an air nozzle 11 are provided on the outer casing of the inspection door 29 according to the present invention. In addition, although not shown in FIG. 1, the air knife 10 (shown in FIG. 5) is also disposed on the top wall of the detecting passage of the inspection door 29. The indicator light 25 is used to indicate the status of the pedestrian being inspected: In progress (yellow light) / idle (green light) I Alarm (red light). A user terminal 24 (e.g., an LCD display) is used to display the inspection results in detail.

Figure 2 shows in detail the internal construction of a security inspection door in accordance with the present invention. As shown in Figure 2, the drug/explosives detection subsystem and the special nuclear/radioactive detection subsystem and the control analysis subsystem are installed in the enclosure of the security inspection door.

The drug/explosives detection subsystem includes: an air inlet 3, an air compressor 1, a carrier gas flow fan 2, a wind knife intake pipe 5, a jet air intake pipe 6, a solenoid valve 7, an air knife blowing port 9, an air knife 10, The air nozzle 11, the exhaust pipe 13, the exhaust port 14, the drug/explosive detector (IMS) 20, the suction fan 21, the precondenser 22, and the suction port 23.

The special nuclear material/radioactive substance detection subsystem includes: a radiation detector 8, a collimator 4, a radiation detector signal line 12, a radiation detection subsystem control box 18.

The control analysis subsystem includes a system control computer 16 and a general control cabinet 17.

It should be noted that although the control analysis subsystem is installed inside the casing of the inspection door in this embodiment, it may be disposed outside the casing according to actual needs.

Because there are many sources of electromagnetic interference in the drug/explosives detection subsystem (such as compressor 1, fan 2, solenoid valve 7, etc.), it will interfere with the special nuclear/radioactive detection subsystem, affecting its detection accuracy and reliability.

In order to avoid the effects of the above interference, the present invention provides a signal isolator 19 to which the radiation detection control box 18 of the special nuclear material/radioactivity detection subsystem is connected via a signal isolator 19 (an isolation device). Specifically, the signal isolator 19 in this embodiment is a filter, a decoupler, an opto-isolator or the like provided on a signal line, a power line, and a ground line of a special nuclear material/radioactive substance detecting subsystem. It should be noted that although the signal isolator 19 is only used in the special nuclear/radioactive substance detection subsystem in Figure 2, this is not limiting and can also be on the drug/explosive detection subsystem. The signal isolator 19 is applied to the signal isolator 19 or both. That is to say, filters, decouplers, opto-isolators, etc. can be placed on the signal lines, power lines and ground lines of the drug/explosive detection subsystem, or the signal lines of the two detection subsystems can be simultaneously Filters, decouplers, and opto-isolators are provided on the power and ground lines.

At the same time, in order to further reduce the interference, a shield (another isolation device) is provided on the radiation detector and the preamplifier in the special nuclear/radioactive substance detection subsystem, and the shielding member is made of a material capable of shielding the space radiation. Made of materials.

In addition, the signal lines of the drug/explosives detection subsystem and the signal lines of the special nuclear/radioactive substance detection subsystem should be arranged as far apart as possible, that is, spatially separated from each other, and where cross-tracking is necessary, vertical cross-wiring is used. To minimize crosstalk.

On the other hand, as can be seen from Figs. 2 and 5, in the present embodiment, the collimator 4 is disposed outside the radiation detector 8. The mouth of the collimator 4 faces the detection space 28, and its wall thickness is greater than 5 to 10 mm, and the material is generally lead. Its purpose is to adjust the detection range of the radiation detector and reduce the interference of external radiation on the inspection results of the inspected pedestrian. Can improve the reliability and accuracy of the inspection.

As shown in Fig. 2, in order to reduce the cost, a set of radiation detectors 8 is used on each side of the detection space 28. The positions of the radiation detectors 8 on the two sides can be shifted from each other, but the detection areas should be slightly overlapped and cannot be completely separated to ensure the reliability of the inspection results.

A plurality of air nozzles 11 are disposed on both side walls of the detecting passage. As shown in Fig. 3, a plurality of air nozzles 11 are arranged in layers, generally not less than 4 layers (5 layers in Fig. 3), and each side has not less than 2 columns (3 columns in Fig. 3). As shown in Fig. 4, the air nozzle 11 of each layer is directed toward the center of the detection space in which the layer is located to enhance the ability to blow suspect particles carried in the laundry. The horizontal direction of the jet stream is indicated by the direction of the jet stream 27 . The air nozzles 11 of the same layer are generally turned on/off at the same time, and the air nozzles 11 of different layers are turned on/off in a time-sharing manner, generally being turned on or off from top to bottom, and after each layer of the air nozzles 11 is sprayed once, and then from the top. The lower cycle, until the end of the jetting process, its switching timing is issued by the main control cabinet 17, by controlling the solenoid valve 7 behind each of the air nozzles 11.

As can be seen from Fig. 5, in the present embodiment, the air knife 10 disposed to blow downward on the top wall of the detecting passage includes four large air blades and two small air blades, and four large air blades surround two small Wind knife arrangement. However, it should be understood by those skilled in the art that this is merely exemplary and other arrangements may be employed.

The working principle of the present invention will be described below.

1. How does the drug/explosive detection subsystem work?

As shown in Fig. 2, the air compressor 1 supplies a high pressure gas at a pressure of 0.2 to 0.8 MPa, preferably about 0.5 MPa. The air nozzle 11 is supplied with high-pressure gas through the air nozzle intake pipe 6, and each of the air nozzles 11 controls its air-jet/close state by an electromagnetic width. The system control computer 16 controls the timing of opening and closing of the solenoid valve 7, the air compressor 1, the carrier gas flow fan 2, and the like through the main control cabinet 17 and the pneumatic control signal line 30. The air taken in by the air compressor 1 and the carrier gas flow fan 2 comes from the intake port 3.

At the same time as the uppermost air nozzle 11 starts working, the carrier gas flow fan 2 is also started to operate, and the air knife 10 shown in Fig. 5 is supplied with air. The air flow is blown from the air knife blowing port 9 of the air knife 10 to form a carrier gas flow, and the flow thereof The direction is as indicated by the carrier gas flow direction 26. The role of the carrier gas stream is to drive the suspect particles blown down by the air nozzle 11 to the suction port 23.

The carrier gas flow in the detection space 28 is sucked into the intake port 23 by the suction fan 21. When the airflow containing the suspected particles entering the intake port 23 passes through the precondenser 22, the suspected particles are adsorbed into the precondenser 22, and the filtered airflow passes through the intake fan 21, the exhaust pipe 13, and the exhaust port 14 Go to the outside atmosphere. During the desorption process, the pre-condenser 22 releases the adsorbed suspicious particles, is inhaled by the drug/explosive detector (IMS) 20 for analysis, and the exhaust gas is discharged to the outside through the exhaust pipe 13 and the exhaust port 14. In the atmosphere.

Data detected by the Drug/Explosives Detector (IMS) 20 is sent via data lines to the main control cabinet 17, and then sent to the system control computer 16 for analysis, and the results are displayed on the user terminal 24 and the indicator light 25.

When the inspection starts, the indicator light 25 shows idle (green light is on), and the inspected pedestrian enters the designated position of the detection space 28 to stand; the system starts to jet, blow, collect gas, and then sends it to the drug, explosive detector (IMS). 20 is detected, and finally the analysis result is given by the system control computer 16. If there are traces of drugs or explosives, an alarm is issued, and the indicator light 25 is alarmed (red light flashes); if no object is found, the inspection ends, the indicator light 25 is idle (green light is on), waiting for the next one Entry of the inspected person.

2. How the ray detection subsystem works

The inspected pedestrian enters the designated position of the detection space 28, and the system starts the work before the drug/explosive detection subsystem under the control of the control analysis subsystem, and after the drug/explosive detection subsystem ends a measurement work, the book This test will be completed again.

The gamma and gamma rays are detected by the ray detector 8, and the detection signals are sent to the ray detecting subsystem control box 18. Since the radiation detection subsystem is susceptible to interference, in order to prevent interference signals from the self-contained drug/explosive detection subsystem, the signal, control line passes through the signal isolator 19, and the signal isolator to the main control cabinet signal line 15 and the overall control cabinet 17 Interconnect, the probe data is ultimately sent to the system control computer 16 for analysis and processing, and the results are sent to the user terminal 24 for display. The result displayed on indicator light 25 is the final result after combining the data from the two detection subsystems.

Thus, according to the present invention, the two detection subsystems are combined and reliably operated, and the task of checking the drugs/explosives and special nuclear/radioactive materials carried by pedestrians can be completed at the same time, and the accuracy is improved. Check efficiency.

Further modifications and applications of the present invention can be made by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

Rights request

A safety inspection door comprising a drug/explosives detection subsystem and a special nuclear/radioactive substance detection subsystem and a control analysis subsystem, the three subsystems being jointly mounted in the inspection door housing, characterized in that The safety inspection door is also provided with an isolating device for isolating the drug/explosive substance detecting subsystem and the special nuclear material/radioactive substance detecting subsystem from each other so as to work independently without interference.

2. The security inspection door according to claim 1, wherein the isolation device comprises a signal line, a power line and a ground line disposed in a special nuclear/radioactive substance detection subsystem and/or a drug/explosive substance detection subsystem. Filters, decouplers and opto-isolators.

3. The security inspection door according to claim 1, wherein the isolation device comprises a shield made of a shielding material, the shield being disposed in a special nuclear matter/radioactivity detection subsystem and a radiation detector and On the preamplifier.

4. The security inspection door according to claim 1, further comprising a collimator mounted to the radiation detector in the special nuclear matter/radioactivity detection subsystem to adjust the detection range of the radiation detector .

The security inspection door according to claim 4, wherein the positions of the radiation detectors on both sides of the detection passage are shifted from each other, but a certain amount of overlap is maintained in the height direction of the detection passage.

6. The security inspection door according to claim 1, wherein, under the control of the control analysis subsystem, the special nuclear matter/radioactivity detection subsystem is first activated for detection, and then the drug/explosion is initiated. The object detection subsystem performs the detection and first stops the drug/explosive detection subsystem at the end of the inspection, and finally stops the special nuclear/radio detection subsystem.

7. The security inspection door according to claim 1, wherein a plurality of air nozzles are disposed on both side walls of the detecting passage, the plurality of air nozzles are arranged in layers, and a plurality of air nozzles in the same layer Points to the center of the detection space where the layer is located.

8. The security inspection door according to claim 1, wherein a wind knife that blows downward is provided on a top wall of the detection passage, and the air knife includes four large air blades and two small air blades, four The wind knife is arranged around two small wind knives.

9. The security inspection door of claim 1, further comprising an indicator light and a user terminal that display the detection status and the inspection result.

The security inspection door according to any one of claims 1 to 9, wherein a signal line of the drug/explosive substance detecting subsystem and a signal line of the special nuclear material/radioactive substance detecting subsystem They are spatially separated from each other, and vertical cross wiring is used when it is necessary to cross the wires.