CN201212886Y - security gate - Google Patents

Abstract

The utility model discloses a safety inspection door, which comprises a drug/explosives detection subsystem, a radioactive substance detection subsystem and a metal detection subsystem arranged in a cabinet, wherein electromagnetic radiation shielding is respectively arranged around the three detection subsystems, In order to isolate the drug/explosives detection subsystem, the radioactive substance detection subsystem and the metal detection subsystem from each other without interfering with each other. The utility model combines the drug/explosives detection subsystem, the radioactive substance detection subsystem and the metal detection subsystem together to form a novel safety inspection door for the first time, so that drugs/explosives, radioactive substances and metal dangerous goods can be inspected at the same time . In addition, the utility model also sets electromagnetic radiation shielding around the three detection subsystems, so that the drug/explosives detection subsystem, the radioactive substance detection subsystem and the metal detection subsystem are isolated from each other and do not interfere with each other, thereby improving The reliability and accuracy of detection.

Description

security gate

technical field

The utility model relates to a safety inspection door, in particular to a safety inspection door capable of simultaneously inspecting drugs/explosives, radioactive substances and metal dangerous goods.

Background technique

Since the "911" incident, anti-terrorism has become a common topic around the world. Terrorist incidents have occurred in the United States, Russia, Britain, Egypt, Spain, Indonesia, India and other countries, and the United States has launched two wars for this. Terrorists use "human bomb" attack to become an important way of destruction, which poses a huge threat to the safe life of ordinary people and social stability. However, the safety gates currently on the market for pedestrian inspection can generally only detect magnetic metals, and are powerless to non-magnetic objects. Therefore, to explosives and narcotics, ordinary safety doors cannot be identified, which is undoubtedly a major loophole for safety inspection.

With the development of narcotics and explosives detection (IMS) technology, it becomes possible to detect suspicious particles such as narcotics and explosives carried by pedestrians. In recent years, foreign experts have conducted a lot of research on gate-type pedestrian inspection technology using IMS technology, and applied for a number of patents. Such as: EP1286151A1, US5915268A1, US6073499A1 and US2001049926A1, etc. In these patents, in order to facilitate the collection of airflow, a variety of door structures have been proposed; in order to improve the collection efficiency, some have proposed a concentration idea (such as US6073499A1, etc.); Blow the inspected pedestrians (such as US2001049926A1) with a continuous air flow, and then add a nozzle spraying high-pressure gas to blow the clothes, the air flow of the blowing gas and the direction of the nozzle spray, or upwards, or downwards, tried various methods ( Such as EP1286151A1, US5915268A1 and US6073499A1).

In terms of detecting special nuclear and radioactive substances, the patent CN 02289591.4 proposes a door-type γ-radiation safety detection device, which uses directional shielding for the NaI(Tl) scintillator for measuring γ-radiation, so that only one side of the scintillator The gamma radioactivity within the solid angle range can be detected; multiple gamma probes are arranged in the doorposts on both sides of the door frame, which improves the detection efficiency of radioactive substances. Patent US 2006/028494 A1 also proposes a radiation safety detection gate, which uses multiple detectors and collimator arrays to realize the simultaneous detection of γ and n.

In terms of metal detection, the patent CN1834690 proposes a through-type metal detection system, which improves the detection of defects in the uneven distribution of the magnetic field and improves the ability to distinguish metal objects through dual-transmission and dual-reception antennas, corresponding circuits, and software. Patent CN1802675A (WO2004/097456) proposes a metal detector with a lightweight structure, which can be operated by batteries or AC power for a long time by setting heavy duty cycle and pulse working mode.

However, due to various reasons, no detection device capable of simultaneously detecting narcotics/explosives, radioactive substances and metal dangerous goods has been found in the market.

Utility model content

Therefore, the utility model aims to provide a safety inspection device capable of simultaneously inspecting narcotics/explosives, radioactive substances and metal dangerous goods.

The utility model provides a safety inspection door capable of simultaneously inspecting drugs/explosives, radioactive substances and metal dangerous goods, including a drug/explosives detection subsystem, a radioactive substance detection subsystem and a metal detection subsystem arranged in the cabinet , wherein electromagnetic radiation shielding is set around the three detection subsystems, so that the drug/explosives detection subsystem, the radioactive material detection subsystem and the metal detection subsystem are mutually isolated and do not interfere with each other.

The utility model combines the drug/explosives detection subsystem, the radioactive substance detection subsystem and the metal detection subsystem together to form a novel safety inspection door for the first time, so that drugs/explosives, radioactive substances and metal dangerous goods can be inspected at the same time . Utilizing the utility model, the detection of narcotics/explosives, special nuclear substances/radioactive substances and prohibited metal utensils can be completed at the same time during one inspection of pedestrians, thereby ensuring the safety of personnel and facilities in important places. In addition, the utility model also sets electromagnetic radiation shielding around the three detection subsystems, so that the drug/explosives detection subsystem, the radioactive material detection subsystem and the metal detection subsystem are isolated from each other and do not interfere with each other, thereby improving The reliability and accuracy of detection.

Description of drawings

Fig. 1 is the front view of security inspection door;

Fig. 2 is a top view of the safety inspection door;

Fig. 3 is the right side view of security inspection door;

Fig. 4 is the left side view of security inspection door;

Fig. 5 is the view seen along A-A in Fig. 1; With

Fig. 6 is a view taken along the direction B-B in Fig. 1 .

Detailed ways

Fig. 1 shows the front view of the safety inspection door of the present utility model. Fig. 2 shows a top view of the safety inspection door of the present invention. Fig. 3 shows the right side view of the security inspection door of the present invention. Fig. 4 shows the left side view of the safety inspection door of the present invention. Figure 5 shows a view of the utility model viewed along the A-A direction in Figure 1; Figure 6 shows a view of the utility model viewed along the B-B direction in Figure 1.

As shown in FIG. 1 , the safety inspection door includes a left cabinet body 22 , a right cabinet body 25 and a top cabinet body 20 , and the left cabinet body 22 , the right cabinet body 25 and the top cabinet body 20 form a door-shaped inspection channel 23 . Preferably, a glass door 24 can be set at the entrance and/or exit of the door-shaped channel 23, and when a pedestrian enters the channel for inspection, the glass door 24 can be closed to isolate the space in the channel from the outside world, which can prevent surrounding interference and improve detection precision.

In this embodiment, the left cabinet body 22, the right cabinet body 25 and the top cabinet body 20 are all made of metal plates, thereby forming an electromagnetic radiation shielding space inside the left cabinet body 22, the right cabinet body 25 and the top cabinet body 20 . The drug/explosives detection subsystem, radioactive substance detection subsystem and metal detection subsystem of the safety inspection door are arranged in the electromagnetic radiation shielding space formed by the above cabinet, which can partially prevent the electromagnetic radiation outside the cabinet from affecting the drugs/explosives. The impact of the explosives detection subsystem, the radioactive material detection subsystem, and the metal detection subsystem. Preferably, the space accommodating the narcotics/explosives detection subsystem, the space accommodating the radioactive substance detection subsystem and the space accommodating the metal detection subsystem are isolated from each other, which can partially prevent the narcotics/explosives detection subsystem, radioactive substance detection Electromagnetic radiation effects between subsystems and metal detection subsystems.

As shown in Figure 2, Figure 3 and Figure 4, the narcotics/explosives detection subsystem includes: an air supply device, a group of air injection devices arranged in the right cabinet body 25, another group of air injection devices arranged in the left cabinet body 22 device, one group of detection devices arranged in the right cabinet body 25, another group of detection devices arranged in the left cabinet body 22, and the fan 1 arranged in the top cabinet body 20.

Specifically, as shown in FIGS. 3 and 4 , the air supply device includes an air storage tank 18 , an air compressor 17 and an air circuit 48 .

Specifically, as shown in Figures 3 and 4, a group of air injection devices in the right cabinet 25 includes an upper limit switch 2, a lifting guide rail 5, an air injection device lifting timing belt 6, a high-speed solenoid valve/rotary motor 7, an air injection device lifting Motor 8 and air nozzle 43.

Specifically, as shown in Figures 3 and 4, another group of air injection devices in the left cabinet body 22 includes an upper limit switch 26, a lifting guide rail 28, an air injection device lifting synchronous belt 29, a high-speed solenoid valve/rotary motor 30, an air injection device Lift motor 31 and air nozzle 43.

Specifically, as shown in Fig. 3 and Fig. 4, one group of detection devices in the right cabinet body 25 includes a narcotics/explosives detector (IMS) 3, a filter heater 9, a filter turntable motor 11, a filter turntable mechanism 12. Turntable electromagnet 15, cleaning axial fan 16, filter screen 49, filter screen 50 and filter screen 51.

Specifically, as shown in Figures 3 and 4, another group of detection devices in the left cabinet body 22 includes a drug/explosives detector (IMS) 55, a filter heater 32, a filter turntable motor 34, a filter turntable Mechanism 35, turntable electromagnet 38, clean axial fan 39 and centrifugal fan 40, filter screen 52, filter screen 53 and filter screen 54.

Since there is an air compressor 17 that generates interfering electromagnetic waves in the gas supply device, a metal shielding shell is placed around the gas supply device to form an electromagnetic radiation shield and prevent the electromagnetic waves generated by the air compressor 17 from affecting the radioactive material detection subsystem and metal detection. subsystem.

Similarly, since there is an electromagnetic valve 7 that generates interfering electromagnetic waves in the air injection device, a metal shielding shell is provided around the air injection device to form an electromagnetic radiation shield and prevent the electromagnetic waves generated by the electromagnetic valve 7 from affecting the radioactive substance detection subsystem and the metal detection subsystem. .

Similarly, since there are fans 39 and 40 that generate interfering electromagnetic waves in the detection device, metal shielding shells are arranged around the detection device to form electromagnetic radiation shielding and prevent the electromagnetic waves generated by fans 39 and 40 from affecting the radioactive substance detection subsystem and metal detection. subsystem.

Similarly, since the fan 1 will generate interfering electromagnetic waves, a metal shielding shell is provided around the fan 1 to form an electromagnetic radiation shield and prevent the electromagnetic waves generated by the fan 1 from affecting the radioactive substance detection subsystem and the metal detection subsystem.

It should be noted that, in the preferred embodiment of the present utility model, a group of air injection devices and a group of detection devices are respectively provided in the left and right cabinets 22 and 25, but it can also be provided only in the left cabinet 22 One group of air injection device and one group of detection device, also can only be provided with one group of air injection device and one group of detection device in the right cabinet body 25, these changes should fall within the scope of protection of the present utility model.

As shown in Fig. 3 and Fig. 4, the air injection device in the left and right cabinets 22 and 25 can move up and down along the lifting guide rail 5, thereby driving the air injection nozzle 43 on the air injection device to move up and down together.

As shown in FIG. 5 and FIG. 6 , two rows of air nozzles 43 are respectively arranged on the inner side walls of the left and right cabinets 22 and 25 , and each row includes two air nozzles 43 . The high-speed electromagnetic valve/rotary motor 7 controls the high-pressure pulsed airflow ejected from the air nozzle 43. The direction of each row of air nozzles 43 points to the center of the inspection channel 23, and the air nozzles 43 move continuously from top to bottom along the guide grooves on the left cabinet body 22 and the right cabinet body 25 to blow out pulsed airflows and blow them to the inspected pedestrians. It should be noted that one row or more than three rows of air nozzles 43 can also be respectively arranged on the inner side walls of the left and right cabinets 22 and 25, and the number of each row of air nozzles 43 is not limited to two, which can be One or more than three.

As shown in Figure 3, the radioactive material detection subsystem includes a set of radiation detection device 4 arranged in the left cabinet body 22 and a set of radiation detection device 4 in the right cabinet body 25, and a metal shielding shell is arranged around the radiation detection device 4 so that Form electromagnetic radiation shielding to prevent the influence of external electromagnetic radiation. It should be noted that a set of radiation detection device 4 can also be set only in the left cabinet body 22, or only a set of radiation detection device 4 can be set in the right cabinet body 23, these changes should fall within the scope of protection of the present utility model .

Further, as shown in Figure 3, the radiation detection device 4 is arranged near the middle position in the height direction of the left cabinet or the right cabinet, so that the installation height of the radiation detection device 4 roughly corresponds to half the height of the human body, which can The effective detection area of the radiation detection device 4 covers the entire pedestrian.

Further, although not shown in the figure, the ray detection device includes gamma detectors and n detectors, and the gamma detectors and n detectors are arranged alternately.

As shown in Fig. 2, Fig. 5 and Fig. 6, the metal detection subsystem comprises a metal detection device 45 arranged in a set of metal detection device 45 of the left cabinet body 22 and a set of metal detection device 45 in the right cabinet body 25, in the metal detection device 45 A metal shielding shell is set around the body to form an electromagnetic radiation shield to prevent the influence of external electromagnetic radiation. It should be noted that a set of metal detection device 45 can also be set only in the left cabinet body 22, or only a set of metal detection device 45 can be set in the right cabinet body 25, these changes should fall within the scope of protection of the present utility model .

In addition, although not shown in the figure, signal isolators are respectively provided on the signal lines, power lines and ground lines of the above three detection subsystems, so as to prevent signal crosstalk among the three detection subsystems. Specifically, filters, decouplers and photoelectric isolators are set on the signal lines, power lines and ground lines of the three detection subsystems. Preferably, the signal lines of the three detection subsystems are spatially separated from each other, and vertical cross wiring is adopted when cross wiring is necessary.

[Working principle of the utility model]

1. Working principle of narcotics/explosives detection subsystem

As shown in Figure 1, it is the appearance of inspection gates for narcotics, explosives, radioactive substances and metal substances. The indicator light 21 is used to indicate several states of the inspected pedestrian: checking (yellow light)/idle (green light)/warning (red light). As shown in Figure 3, air compressor 17 provides high-pressure gas, provides high-pressure gas to air nozzle 43 through intake pipe, and the jet air flow of each group of air nozzle 43 is all controlled by a high-speed electromagnetic valve/rotary motor 7. The air nozzle 43 is installed on the air injection device, and the air injection device is driven by the air injection device lifting motor 31 to move up and down along the lifting guide rail 28 by the air injection device lifting synchronous belt 29 . The touch screen/computer system 27 controls parts such as the jet device lifting motor 31, high-speed solenoid valve/rotating motor 7, air compressor 17, centrifugal fan 40, fan 1 through the electrical control panel 19.

Air nozzle 43 is made up of several, as shown in Figure 5 and Figure 6, is installed on the air injection device in the left cabinet body 22 and the right cabinet body 25 respectively. The high-pressure pulsed airflow ejected from the air nozzle 43 is controlled by the high-speed electromagnetic valve/rotary motor 7 . The direction of each group of air nozzles 43 points to the center of the inspection passage 23, and the air nozzles 43 move continuously from top to bottom along the guide grooves on the left cabinet body 22 and the right cabinet body 25 to spray pulsed airflows and blow them to the inspected pedestrians.

The fan 1 is installed in the middle part of the top cabinet body 20, and generates a downward airflow during operation. The particles blown off by the air nozzle 43 from the body of the inspected pedestrian are blown to the lower part of the inspection channel 23 . At the bottom of the left cabinet body 22 and the right cabinet body 25 on both sides of the inspection channel 23, there is a collection channel 44, and the centrifugal fan 40 sucks these particles into the collection channel 44. Filter screens 49 and 52 are installed at the end of the collecting channel 44, and the particles blown off from the pedestrians to be inspected are collected when passing through the filter screens.

Filter screen 49,50,51,52,53,54 is installed on the filter screen turntable mechanism 12,35 respectively, and filter screen turntable mechanism 12,35 is controlled by filter screen turntable motor 11,34 and rotates, and each filter screen is in different Alternate work at the station. There are 3 stations respectively on the filter screen turntable mechanism 12,35: filter screen detection station 10,33, collection station 13,36 and filter screen cleaning station 14,37. Filter screen detection stations 10, 33 are composed of filter screen heaters 9, 32 and drug and explosive detectors (IMS) 3, 55 respectively, and are responsible for detecting particles adsorbed on the filter screen. Axial-flow cleaning fan 16,39 is respectively installed on filter screen cleaning station 14,37, is responsible for the cleaning work to filter screen.

Glass doors (options) 24 are installed on both sides of the inspection channel 23, and can be selected according to actual needs.

When starting the inspection, the indicator light 21 shows idle (green light is on), and the inspected pedestrian enters the designated position of the inspection channel 23 and stands up; the system starts to spray and blow air, and collects the particles blown off from the inspected person; The filter screen of station 13,36 rotates to filter screen detection station 10,33 by the filter screen turntable motor 11,34 on the filter screen turntable mechanism 12,35 after the collection work is finished; The filter screen heaters 9 and 32 of , 33 heat the filter screen, and the particles adsorbed on the filter screen are vaporized and inhaled by the narcotics and explosives detectors 3 and 55 for detection and analysis, and the analysis results are sent to the touch screen/computer system 27 for processing , and displayed on the screen. If traces of narcotics or explosives are found, an alarm will be sent, and indicator light 21 will report to the police (red light flashes); if no substance is found, then this inspection ends, and indicator light 21 shows idle (green light is on), waiting for the next Entry of the inspected person.

2. Working principle of radioactive substance detection subsystem

When the inspected pedestrian enters the designated position of the inspection channel 23, the system starts to work before the narcotics/explosives detection subsystem. After the narcotics/explosives detection subsystem finishes a measurement work, the subsystem ends the measurement work .

The gamma and n-rays are detected by the radioactive substance detector 4, and the detected signals are analyzed. The probe data is ultimately sent to the touch screen/computer system 27 for processing and display. If radioactive substances are detected, the system will send out an alarm signal.

3. Working principle of metal detection subsystem

Metal detector 45 installation positions are shown in Fig. 2, Fig. 5 and Fig. 6. When the inspected person passes through the inspection channel 23, the metal detector 45 detects him, and the detection result is sent to the touch screen/computer system 27 for display by means of communication. If any prohibited metal objects are detected, the system will send out an alarm signal. The detection sensitivity of the metal detector 45 can be set as required.

In short, the combination of the three functional detection subsystems can complete the task of inspecting drugs, explosives, radioactive substances and prohibited metal objects carried by pedestrians at the same time, which improves the inspection efficiency.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that these embodiments can be changed without departing from the principle and spirit of the present invention. The scope is defined by the claims appended hereto and their equivalents.

Claims (10)

1. A safety inspection door, comprising a drug/explosives detection subsystem, a radioactive substance detection subsystem and a metal detection subsystem arranged in the cabinet, wherein electromagnetic radiation shielding is respectively set around the three detection subsystems, In order to isolate the drug/explosives detection subsystem, the radioactive substance detection subsystem and the metal detection subsystem from each other without interfering with each other. 2. The safety inspection door according to claim 1, the cabinet body includes a left cabinet body, a right cabinet body and a top cabinet body defining a door-shaped inspection channel, and the left cabinet body, the right cabinet body and the top cabinet body are all Made of metal to form an electromagnetic radiation shield. 3. The security inspection gate according to claim 2, wherein the drug/explosives detection subsystem comprises: At least one set of air spray devices arranged in the left cabinet and/or the right cabinet that can move up and down in the vertical direction; a set of air supply means for supplying air to the jet means; At least one set of detection devices arranged in the left cabinet and/or the right cabinet; and a fan arranged in the top cabinet, Wherein, metal shielding shells are respectively arranged around the air supply device, the air injection device, the detection device and the fan so as to form electromagnetic radiation shielding. 4. The safety inspection door according to claim 3, wherein a set of air injection devices is respectively arranged in the left cabinet body and the right cabinet body; and a group of detection devices is respectively arranged in the left cabinet body and the right cabinet body. 5. The safety inspection door according to claim 2, wherein the radioactive material detection subsystem includes at least one set of radiation detection devices arranged in the left cabinet and/or the right cabinet, and around the radiation detection device A metal shielding shell is provided to form electromagnetic radiation shielding. 6. The security inspection door according to claim 5, wherein a set of radiation detection devices is provided in the left cabinet and the right cabinet respectively; and each set of radiation detection devices includes gamma detectors and n detectors arranged alternately. 7. The safety inspection door according to claim 5 or 6, wherein the radiation detection device is arranged near the middle position in the height direction of the left cabinet or the right cabinet, so that the installation height of the radiation detection device is approximately Corresponds to half the height of the human body. 8. The security inspection door according to claim 2, wherein the metal detection subsystem includes at least one set of metal detection devices arranged in the left cabinet and/or the right cabinet, and is arranged around the metal detection device The metal shielding shell thus forms electromagnetic radiation shielding. 9. The security inspection door according to claim 8, wherein a set of metal detection devices are respectively arranged in the left cabinet body and the right cabinet body. 10. The security inspection door according to claim 1, wherein Filters, decouplers and photoelectric isolators are respectively arranged on the signal lines, power lines and grounds of the three detection subsystems; and The signal lines of the three detection subsystems are spatially separated from each other, and vertical cross wiring is adopted when cross wiring is necessary.

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