KR100479959B1 - A Security Checking System For A Container - Google Patents

Abstract

The present invention relates to a container cargo retrieval apparatus capable of generating a three-dimensional image by using a radiation signal detected in each direction. To this end, the landing 10 of the predetermined length through which the truck 16 loaded with the container 14 on the upper surface passes; Wires 13 installed at both ends of the platform 10 to connect the winches 12a and 12b and the winches 12a and 12b to tow the truck 16; An installation wall 20 installed in a tunnel shape along the platform 10; First search means (30) installed in the installation wall (20) to detect radiation transmitted by irradiating the radiation upward toward the side of the truck (16); Second search means (40) installed adjacent to the first search means to detect the transmitted radiation by irradiating the radiation downward toward the side of the truck (16); Third search means (50) installed adjacent to the second search means to detect radiation transmitted by irradiating radiation toward an upper surface and one side of the truck (16); Fourth search means (60) installed adjacent to the third search means to detect radiation transmitted by irradiating radiation toward an upper surface and the other side of the truck (16); And a computer for generating a three-dimensional image based on each output signal of the first, second, third and fourth search means.

Description

Container Cargo Screening Device {A Security Checking System For A Container}

The present invention relates to a cargo container retrieval apparatus using radiation, and more particularly, to a container cargo retrieval apparatus capable of generating a three-dimensional image by using a radiation signal detected in each direction.

In general, airports are equipped with see-through devices for viewing relatively small items, such as suitcases, suitcases, etc., which are directly carried by passengers. By the way, while the conventional marketplace is suitable for use in a relatively small object such as a bag, there is a disadvantage that the inspection is not suitable for a large cargo having a volume larger than that. Therefore, it was difficult to find out whether or not explosives, drugs, firearms, camouflage produce, smugglers, etc. were contained in large cargoes. Until now, this customs clearance has been limited by the experience and the search dog's experience, so there is a limit that the deviation is severe and inaccurate.

In particular, when a large amount of cargo, such as containers at the airport, seaport, border area, customs clearance, it is impossible to visually inspect one by one, and when using a separate fluoroscopy device, the inspection speed was slow, which caused great inconvenience. In the case of a large cargo, there are more parts that are hidden than the part to be seen, and since the mono-vision is used, the shape of the object tends to be distorted.

In order to solve these drawbacks, research on large detectors has been actively conducted, and some products have been developed. For example, Korean Patent Application Nos. 2000-68783, 2000-68784, 2000-68785, 2000-68786, 2000-68787, 2000-68788, 2000-68789, 2000-68790, 2000-68791, 2000-68792 A technique for a large-sized detector and a method of manufacturing the same is disclosed, and as an initial product applying the same, Korean Patent Application Nos. 2001-15906, 2001-15907, 2001-15908, 2001-15909, 2001-15910, 2001-15911, Apparatus and methods are disclosed that can see through.

Therefore, the present invention has been made to solve the problems of the conventional see-through device, the first object of the present invention is a container cargo retrieval apparatus that can obtain a more three-dimensional and accurate three-dimensional image by using a plurality of radiation sources To provide.

It is a second object of the present invention to provide a container cargo retrieval apparatus that is easy to assemble and disassemble and can search a large amount of container cargo at high speed.

An object of the present invention as described above, the platform 10 of the predetermined length that the truck 16, the container 14 loaded on the upper surface passes; Wires 13 installed at both ends of the platform 10 to connect the winches 12a and 12b and the winches 12a and 12b to tow the truck 16; An installation wall 20 installed in a tunnel shape along the platform 10; First search means (30) installed in the installation wall (20) to detect radiation transmitted by irradiating the radiation upward toward the side of the truck (16); Adjacent to the first search means. Second search means (40) for detecting the transmitted radiation by irradiating the radiation downward toward the side of the truck (16); Third search means (50) installed adjacent to the second search means to detect radiation transmitted by irradiating radiation toward an upper surface and one side of the truck (16); Fourth search means (60) installed adjacent to the third search means to detect radiation transmitted by irradiating radiation toward an upper surface and the other side of the truck (16); And a computer for generating a three-dimensional image based on each output signal of the first, second, third, and fourth retrieval means.

And, the search means 30, 40, 50, 60 are installed on the inner surface of the mounting wall 20, the source box (32, 42, 52, 62) for emitting radiation through the slit; A detector (35, 45, 55, 65) installed in an area of the inner surface of the mounting wall (20) where radiation emitted from the source box reaches and converting the transmitted radiation into an electrical signal; And radiation shields 23, 24, and 25 installed in an area of the outer wall of the mounting wall 20 through which the radiation passes.

In addition, each of the detectors 35, 45, 55, and 65 may have a bent "a" shape or a pair of flat plate detectors to maintain the "a" shape.

Further, the winch 12a is more preferably towing the truck 16 at a constant speed.

At least one camera 70 may be installed on an inner surface of the mounting wall 20.

The first search means 30, the second search means 40, the third search means 50, and the fourth search means 60 maintain a constant distance along the towing direction of the truck 16. More preferred.

The first, second, third, and fourth search means 30, 40, 50, and 60 may be installed in an intermediate region of the landing 10.

Other objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and the preferred embodiments associated with the accompanying drawings.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a front view of a container cargo retrieval apparatus according to the present invention, and FIG. 2 is a partially enlarged view of an intermediate region of the landing 10 in the front view shown in FIG. As shown in Fig. 1 and Fig. 2, the search apparatus of the present invention comprises a platform 10, search means 30, 40, 50, 60, installation wall 20, shield 23 and the like.

The platform 10 is made of steel to withstand the truck 16 loaded with the container 14 to pass at a constant speed, is composed of a plurality of parts are configured to be easily assembled and disassembled. The length of the landing 10 is approximately twice as long as the length of the container 14 so that one truck 16 can constantly pass through the middle portion. In addition, the width is made somewhat larger than the width of the vehicle.

The inclined surface is provided in both ends of the boarding point 10 so that the truck 16 may go up and down smoothly, and the winches 12a and 12b are provided. The pair of winches 12a, 12b are connected by a wire 13, the middle region of the wire 13 is configured to be connected to the front of the truck (16). The first winch 12a and the wire 13 serve to pull the truck 16 without a driver at a constant speed, and the second winch 12b serves to rewind the wire 13 after the towing.

The installation wall 20 is made of a box-shaped tunnel structure having a size that the truck 16 can pass through. Searching means (30, 40, 50, 60) for emitting and detecting radiation are provided in the intermediate region of the inner surface of the mounting wall (20). On the outer surface of the wall 20, a shield 23 for shielding radiation is provided.

3 is a partial cross-sectional view taken along the line B-B in FIG. 1. As shown in FIG. 3, the first search means 30, the second search means 40, the third search means 50, and at different positions in the intermediate region of the landing 10 and the installation wall 20. Fourth search means 60 is provided. Each of the retrieval means 30, 40, 50, 60 are spaced apart at equal intervals with respect to the advancing direction of the container 14, respectively, in the installation wall 20 to irradiate radiation in different directions. It is fixed at another position (described later).

The first search means 30 includes a first source box 32 that emits radiation, the second search means 40 includes a second source box 42 that emits radiation, The first source box 52 for emitting radiation corresponds to the third search means 50. The fourth search means 60 includes a first source box 62 that emits radiation.

Each of these source boxes 32, 42, 52, and 62 uses a radioisotope, Co ⁶⁰ , in which case gamma rays with energy of 1.17 MeV and 1.33 MeV are emitted. In addition, the discharge port (not shown) has a vertical slit shape, and the shutter (not shown) controlled by an electric signal is installed in the discharge port (not shown) to control the emission.

Shields 23, 24 and 25 are provided on the outer surface of the mounting wall 20 to shield the transmitted radiation. These shields 23, 24, 25 are installed on the outer surface of the mounting wall 20 in the direction in which each of the source boxes 32, 42, 52, 62 irradiate the radiation, and each search means 30, 40, 50. And 60) respectively. That is, the shields 23, 24, and 25 are installed in the vertical portion and the ceiling portion of the outer surface of the installation wall 20 in the shape of "a" (to be described later) or in a straight form on the vertical portion. If necessary, a shield may be provided at the lower portion of the landing 10 through which the truck 16 passes.

4 is a right side view of the container cargo retrieval apparatus according to the present invention. As shown in FIG. 4, a container 14 may pass through the installation wall 20, and a landing 10 may be provided at the bottom of the installation wall 20. In the vicinity of the container 14 in the interior of the installation wall 20, "a" shaped detectors 35, 45, 55, 65 are provided for each detection means 30, 40, 50, 60.

In addition, a pair of CCD cameras 70 for photographing the truck 16 entering and the truck 16 advancing are attached to the ceiling of the installation wall 20. Such The output signal of the camera 70 is displayed on a television (not shown) in the command post 100.

Shields 23, 24 and 25 for shielding radiation are provided on the outer surface of the installation wall 20, and the command post 100 is installed in the vicinity. Inside the command post 100, a computer and a monitor (not shown) for collecting the output signals of the detectors 35, 45, 55, 65 and generating three-dimensional image signals therefrom are installed, and the camera 70 and A connected television (not shown) is installed to provide central control.

The first source box 32 is installed on the lower side of the inner surface of the mounting wall 20 to irradiate the radiation upward from the lower side of the container 14. The arc angle of the emitted radiation is approximately 63 degrees.

The second source box 42 is installed above the inner surface of the installation wall 20 to irradiate the radiation downward from the upper side of the container 14. The arc angle of the emitted radiation is approximately 63 degrees.

The third source box 52 is installed on the ceiling side of the inner surface of the installation wall 20 to irradiate the top and one side of the container 14 downwardly. The arc angle of the emitted radiation is approximately 73 degrees.

The fourth source box 62 is installed on the ceiling side of the inner surface of the mounting wall 20 to irradiate the upper and other sides of the container 14 with radiation. The arc angle of the emitted radiation is approximately 73 degrees.

The detectors 35, 45, 55, and 65 use electrode plates made of materials having a very high resistivity, and a thickness of about 2-3 mm is appropriate. The width of the signal processing strips of the detectors 35, 45, 55, and 65 was about 0.8 mm, and the detectors 35, 45, 55, and 65 used quadruple gaps. At this time, the time resolution was less than 2 x 10 ^-9 seconds, and the spatial resolution was about 0.25 cm. Since it takes about 60 seconds to search one container, about 60 containers can be searched per hour. As the detector used in the present invention, a detector using crystal, a semiconductor detector using silicon, and the like may be used in addition to a multi-gap gas detector using a material having high specific resistance.

Hereinafter, with reference to Figures 5, 6, 7, 8 will be described in detail the specific configuration of each search means. FIG. 5 is a configuration diagram showing the configuration of the first search means 30 in the right side view of FIG. As shown in FIG. 5, the first source box 32 is installed below the left side (see FIG. 5) of the container 14 among the inner surfaces of the mounting wall 20, and the detector 35 is provided with the container 14. On the right and top of the "a" is installed. The first shield 23 is provided on the ceiling of the outer surface of the mounting wall 20, and the third shield 25 is provided on the right vertical portion of the outer surface.

FIG. 6 is a configuration diagram showing the configuration of the second search means 40 in the right side view of FIG. As shown in FIG. 6, the second source box 42 is installed above the left side (see FIG. 6) of the container 14 among the inner surfaces of the mounting wall 20, and the detector 45 is provided with the container 14. On the right side and the bottom of the "a" character is installed by turning. At this time, the horizontal portion of the detector 45 is installed by cutting a part of the landing 10 so that the wheels of the truck 16 do not touch. And, The third shield 25 is installed in the vertical portion of the outer surface of the mounting wall 20.

FIG. 7 is a configuration diagram showing the configuration of the third search means 50 in the right side view of FIG. As shown in FIG. 7, the third source box 42 is installed on the left side of the upper side (see FIG. 7) of the container 14 among the inner surfaces of the mounting wall 20, and the detector 55 is placed in the container 14. On the right side and the bottom of the "a" character is installed by turning. At this time, the horizontal portion of the detector 55 is installed by cutting a part of the landing 10 so that the wheels of the truck 16 do not touch. Then, a third shield 25 is provided on the vertical portion of the outer surface of the mounting wall 20. ,

FIG. 8 is a configuration diagram showing the configuration of the fourth search means 60 in the right side view of FIG. As shown in FIG. 8, the fourth source box 62 is installed above the right side (see FIG. 8) of the container 14 among the inner surfaces of the mounting wall 20, and the detector 65 is placed in the container 14. To the left and bottom of the "a" is installed by turning the ruler. At this time, the horizontal portion of the detector 65 is installed by cutting a part of the landing 10 so that the wheels of the truck 16 do not touch. Then, a second shield 24 is provided on the vertical portion of the outer surface of the mounting wall 20.

Hereinafter will be described the operation of the container cargo retrieval device having the configuration as described above.

First, the preparation steps for searching are explained. The truck 16 loaded with the container 14 is positioned on one side of the landing 10, and the wire 13 to be towed to the front of the truck 16 in the state where the driver gets off. This completes the preparation step as shown in FIG.

The first winch 12a is then rolled up at a constant speed to move the truck 16 and at the same time emit radiation from each of the detection means 30, 40, 50, 60. Truck 16 detects fourth As it passes through the interior of the means 60, the radiation is emitted downward at an arc angle of about 73 degrees from the fourth source box 62 as shown in FIG. As it passes through the truck 16, the radiation causes a change in accordance with the contents of the truck 16 and this changed radiation passes through the fourth detector 65. At this time, the fourth detector 65 detects the changed radiation, converts it into an electrical signal, and outputs the converted signal. The radiation that has passed through the fourth detector 65 reaches the second shield 24 and no longer proceeds and is shielded.

The front portion of the truck 16 passing through the fourth detection means 60 is irradiated with radiation having the configuration as shown in FIG. 7 while passing through the third detection means 50. The radiation thus irradiated is output as an electrical signal by the third detector 55 in the same principle as described above.

As the truck 16 and the container 14 enter at a constant speed, the order of the fourth detecting means 60, the third detecting means 50, the second detecting means 40, and the first detecting means 30 is achieved. Detection takes place. The detection operation of the second detection means 40 is the same as that of FIG. 6, the detection operation of the first detection means 30 is the same as that of FIG. 5, and the detection principles are the same.

The electrical output signal of each detector 35, 45, 55, 65 measured at a constant sampling period is transmitted to the command post 100 and input to a computer (not shown). Then, the three-dimensional image signal is generated by combining mechanical data (size, installation position and interval), characteristics (sensitivity, output voltage range), and the like of each detector 35, 45, 55, 65. In this case, the image is configured to derive a gamma ray transmission image of 2 million pixels or more. The video signal may be processed and displayed in real time as the truck 16 and the container 14 pass, or may be displayed through a constant video signal processing after the passage is completed. Also, While the truck 16 is moving, the operator in the command post 100 can visually confirm the search situation through the CCD camera 70.

After the truck 16 and the container 14 have passed through all the search means 30, 40, 50, 60, the wire 13 is released and the second winch 12b is wound to initiate the wire 13. Return to position The search is then completed as the truck 16 descends from the landing 10 by the driver's driving. When the search is completed, the preparation of the next truck is followed, so that a plurality of trucks can be searched continuously.

Approximate dimensions of the various components used in the present invention are as follows. The length of the boarding point 10 shown in FIG. 1 is about 35 m, and the length of the installation wall 20 is about 25 m. In addition, the height of the installation wall 20 is about 6.3 m, and the width is about 6 m. In addition, the thickness of each shield is about 50 cm.

In the present invention, four search means are used, but the number of search means may be reduced to two or three or increased to five or six or more depending on the type and size of cargo. Although the cargo of the truck 16 and the container 14 has been shown and described, of course, the present invention can be easily applied to a freight train or other cargo moving on a conveyor belt.

Container cargo retrieval apparatus according to the present invention is prefabricated, can be easily installed and operated in border areas, ports, ports, airports, etc., can be quickly disassembled and moved.

According to the container cargo retrieval apparatus according to the present invention as described above, a three-dimensional and accurate three-dimensional image can be obtained by using a plurality of radiation sources, it is characterized in that a precise search can be made.

In addition, it is easy to assemble and dismantle, so that a large amount of container cargo can be retrieved at high speed, thereby satisfying performance and maneuverability at the same time.

And, there is an advantage that can accurately display the shape of the large container without distortion. Therefore, even if weapons, drugs, and camouflage agricultural products are contained in the container can be quickly caught.

Although the present invention has been described in connection with the above-mentioned preferred embodiments, it is possible to make various modifications or variations without departing from the spirit and scope of the invention. Accordingly, the appended claims will cover such modifications and variations as fall within the spirit of the invention.

1 is a front view of a container cargo retrieval apparatus according to the present invention,

2 is a partially enlarged view of an intermediate region of the landing 10 in the front view shown in FIG.

3 is a partial cross-sectional view taken along the line B-B in FIG.

4 is a right side view of the container cargo retrieval apparatus according to the present invention,

5 is a configuration diagram showing the configuration of the first search means 30 in the right side view of FIG.

6 is a configuration diagram showing the configuration of the second search means 40 in the right side view of FIG.

7 is a configuration diagram showing the configuration of the third search means 50 in the right side view of FIG.

FIG. 8 is a configuration diagram showing the configuration of the fourth search means 60 in the right side view of FIG.

<Short Description of Main Reference Signs>

10: platform 13: wire

12a, 12b: winch 14: container

16: truck 20: mounting wall

23: first shield 24: second shield

25: third shield 30: first search means

40: second search means 50: third search means

60: fourth search means 35, 45, 55, 65: detector

32, 42. 52, 62: Sailor box 70: Camera

100: command post

Claims (7)

A boarding point 10 of a predetermined length through which the truck 16 on which the container 14 is loaded is passed; Wires 13 installed at both ends of the platform 10 to connect the winches 12a and 12b and the winches 12a and 12b to tow the truck 16; An installation wall 20 installed in a tunnel shape along the platform 10; First search means (30) installed in the installation wall (20) to detect radiation transmitted by irradiating the radiation upward toward the side of the truck (16); Second search means (40) installed adjacent to the first search means to detect the transmitted radiation by irradiating the radiation downward toward the side of the truck (16); Third search means (50) installed adjacent to the second search means to detect radiation transmitted by irradiating radiation toward an upper surface and one side of the truck (16); Fourth search means (60) installed adjacent to the third search means to detect radiation transmitted by irradiating radiation toward an upper surface and the other side of the truck (16); And A computer for generating a three-dimensional image based on each output signal of the first, second, third, and fourth retrieval means, Each search means 30, 40, 50, 60 is A source box (32, 42, 52, 62) installed on the inner surface of the mounting wall (20) to emit radiation through the slit; A detector (35, 45, 55, 65) installed in an area of the inner surface of the mounting wall (20) where radiation emitted from the source box reaches and converting the transmitted radiation into an electrical signal; And And a radiation shield (23, 24, 25) installed in an area of the outer wall of the installation wall (20) where the radiation passes. delete The container according to claim 2, wherein the detectors (35, 45, 55, 65) have a bent "a" shape or a pair of flat plate detectors to maintain the "a" shape. Cargo Screening Device. delete The container cargo retrieval apparatus according to claim 1, wherein at least one camera (70) is provided on an inner surface of the installation wall (20). The method of claim 1, wherein the first search means 30, the second search means 40, the third search means 50 and the fourth search means 60 is constant along the towing direction of the truck (16). Container cargo search device, characterized in that for maintaining a gap. The container cargo retrieval apparatus according to claim 1, wherein said first, second, third, and fourth retrieval means (30, 40, 50, 60) are provided in an intermediate region of said platform.