KR20020076006A - A Tower Tpye Vehicle fluoroscopy Device And Method Thereof - Google Patents

Abstract

PURPOSE: A tower type vehicle projection apparatus and method is provided to perform a fluoroscopy to inspect vehicles in a rapid manner, while accurately displaying shape of a large vehicle through the use of a stereo vision and rapidly detecting arms or bomb from the interior of vehicle. CONSTITUTION: A tower type vehicle projection apparatus comprises a light source box(310) having a radiation source(320) arranged inside of the light source box so as to radiate radioactive rays(325) to a vehicle(500); a transport unit(220) for transporting the light source box in a horizontal direction; a detection unit(400) for detecting the radioactive rays passed through the vehicle; a horizontal bar(300) having an end attached to the light source box and the other end connected to the detection unit, and which permits the light source box and the detection unit to integrally move; and a converting unit for converting an electrical signal output from the detection unit into a video signal. The detection unit includes detection panels(420,430) having detectors stacked into layers. The converting unit includes computers for receiving electrical signals output from the detection panels and generating video signals for the shape of the vehicle; and monitors for receiving video signals from computers and displaying the received video signals. A projection method comprises the steps of pausing the vehicle at a designated position and moving the horizontal bar in a direction; transporting the horizontal bar while emitting radioactive rays to the vehicle; detecting the radioactive rays passed through the vehicle and converting the detected result into an electrical signal; inputting the electrical signal to computers and generating three-dimensional video signals; and displaying video signals.

Description

A tower tpye vehicle fluoroscopy device and method thereof

The present invention relates to a see-through device using radiation, and more particularly, to a tower-type vehicle see-through device that can see a passenger car, a van, a bus, and the like, and a method thereof.

1 is a perspective view of a conventional X-ray perspective apparatus installed in an airport or a harbor. As shown in FIG. 1, relatively small articles such as suitcases, suitcases, etc., which are directly carried by passengers, use the market value as shown in FIG. 1.

The bag 4 is constantly transported while being placed on the conveyor belt 5, and one side of the conveyor belt 5 is provided with an emission part 2 for emitting radiation and a light receiving part 3 for receiving it. The video signal from the light receiver 3 is transmitted to the monitor 1 so that the user can visually check what is inside the bag 4.

By the way, while the conventional marketplace is suitable for use on a relatively small object such as a bag, there is a disadvantage that the inspection is not suitable for a vehicle having a volume larger than that. In particular, when a vehicle passes through the border area or enters a military unit, a government agency, etc. by vehicle, a search for explosives, drugs, weapons, etc. is necessary.

However, until now, the inside of the vehicle and the trunk were examined with the naked eye or a detection dog, and a mirror was inserted into the underside of the vehicle. As a result, a large amount of time and manpower was required for customs clearance inspection, and there was a tendency to depend greatly on the skill and knowledge of the inspector.

Accordingly, the present invention has been made to solve the above problems, and a first object of the present invention is to provide a tower-type vehicle perspective apparatus and a method capable of quickly inspecting a vehicle.

A second object of the present invention is to provide a tower-type vehicle perspective apparatus and method which can accurately display the shape of a large vehicle without distortion by using a single radiation source and a plurality of detection plates.

An object of the present invention as described above, the source box 310 including a radiation source 320 therein to irradiate the radiation toward the vehicle 500;

Transfer means 220 for reciprocating the source box 310 in a horizontal direction;

A detector 400 provided at one side of the source box 310 to detect radiation passing through the vehicle 500;

A horizontal bar (300) having one end fixed to the source box (310) and the other end connected to the detection unit (400) to move the source box (310) and the detection unit (400) integrally; And

Conversion means for converting the electrical signal of the detection unit 400 into an image signal,

The detector 400 includes a detection panel 420 having a plurality of detectors 422 stacked therein.

The detection panel 420 is achieved by the tower-type vehicle perspective apparatus, characterized in that arranged in an arc shape so that three to five at equal intervals with the radiation source 320 in the detection unit 400.

The conveying means 220 may be implemented by an electric motor and a gear device (rack-pinion gear) and a plurality of limit switches.

The detection unit 400 includes a detection panel 420 in which a plurality of detectors 422 are stacked therein, and the detection panel 420 includes three to five radiation sources 320 in the detection unit 400. It is preferable to arrange | position in circular arc shape so that it may become equally spaced.

In addition, the conversion means, a plurality of computers (710, 720, 730) for receiving the electrical signal of the detection panel 420 to generate a video signal of the shape of the vehicle 500; And a plurality of monitors 715, 725, and 735 for receiving and displaying video signals corresponding to the respective detection panels 420 from the computers 710, 720, and 730.

And, the sailor box 310, the transfer means 220 is installed in the see-through portion 200, the see-through portion 200, a plurality of wheels 240 installed in the lower portion to be movable; And it is possible to include a drive means 230 for driving the wheel 240.

The drive unit 230 may be an electric motor or an engine, it is preferable to have a separate steering device.

An object of the present invention as described above is to stop the vehicle 500 to be inspected at the designated position, the initial step of moving the horizontal bar 300 to one side;

A transfer step of transferring the horizontal bar 300 at a constant speed while emitting radiation 325 from the radiation source 320 toward the vehicle 500;

A detection step of detecting the radiation 325 passing through the vehicle 500 by the detector 422 and converting the radiation 325 into an electrical signal;

Generating a video signal of a 3D image by inputting the electrical signal to a computer (710, 720, 730); And

It can also be achieved by the perspective method of the tower vehicle perspective device characterized in that the display step of transmitting the video signal to the monitor (715, 725, 735) and display.

In addition, the radiation 325 is emitted in a line shape in the transfer step.

In the detecting step, the electrical signal is preferably converted every predetermined period.

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.

1 is a perspective view of a conventional X-ray perspective apparatus,

Figure 2 is a perspective view of a tower vehicle perspective device according to an embodiment of the present invention,

3 is a front configuration diagram of the tower type vehicle perspective apparatus shown in FIG. 2;

4 is a schematic plan view of the detection unit and the computer device of the tower vehicle perspective apparatus shown in FIG.

5 is a cross-sectional view of the detection panel shown in FIG.

FIG. 6 is a configuration diagram schematically showing only a signal pad of the detection panel shown in FIG. 5.

<Short Description of Main Reference Signs>

100: see-through device, 200: see-through part,

230: driving device, 240: clairvoyance wheel,

300: horizontal bar, 310: sailor box,

320: radiation source, 325: radiation,

400: detector, 410: detector wheel,

420, 430, 440: detection panel, 422: detector,

424: signal pad, 426: signal line,

500: vehicle, 710, 720, 730: computer,

715, 725, 735: monitor.

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

2 is a perspective view of a tower vehicle perspective apparatus according to an embodiment of the present invention. As shown in FIG. 2, the see-through device 100 is largely composed of a see-through unit 200, a detector 400, and the like.

The seeker 200 is slightly larger than a vehicle 500 such as a bus, and has a radiation source 320 disposed therein to emit radiation (for example, high energy gamma rays) toward the vehicle 500. In addition, a connection groove 210 having a predetermined width is formed through the upper surface of the see-through part 200, and the see-through part wheel 240 is installed on the lower surface and is movable.

The detector 400 is a portion where the radiation passing through the vehicle 500 arrives and is detected, and a detector wheel 410 is attached to the bottom of the detector 400.

The see-through parts and the detector 400 are spaced apart from each other by the width of the vehicle 500 and are connected to each other through the horizontal bar 300 of the upper portion. That is, one end of the horizontal bar 300 is connected to the source box 310 in the see-through section 200, the other end is integrally connected to the upper end of the detector 400. Thus, the source box 310, the horizontal bar 300 and the detector 400 is moved integrally.

The vehicle 500 to be inspected moves and is positioned between the seeker 200 and the detector 400. At this time, the driver of the vehicle 500 should get off.

FIG. 3 is a front configuration diagram of the tower vehicle perspective apparatus shown in FIG. 2. As shown in FIG. 3, the transmission device 220, the source box 310, the driving device 230, and the like are installed in the see-through part 200.

The transfer device 220 reciprocates the horizontal bar 300 from side to side within the connection groove 210. Representative examples of such a transfer device 220 may be used to transfer the transfer gear 330 by using an electric motor and a reduction gear, when using a linear motor, or using a hydraulic or pneumatic cylinder device.

The source box 310 includes a radiation source 320 capable of emitting radiation such as X-rays, gamma rays, etc., and all other surfaces thereof are closed to emit radiation only in the direction of the vehicle 500. For example, when Co ⁶⁰ , which is a radioisotope, is used as the radiation source 320, gamma rays having energy of 1.17 MeV and 1.33 MeV are emitted.

The driving device 230 is for moving the entire viewing part 200, and can be simply implemented by using an electric motor, an engine, a steering device, or the like, and may be implemented by mounting the viewing part 200 in a freight vehicle. have.

The detection unit 400 connected to the horizontal bar 300 is a tower type and has a height slightly higher than that of the vehicle 500, and the width is smaller than the height (tower type). In addition, a plurality of detection panels 420 and 430 are arranged upright inside.

In the case where the vehicle 500 is a passenger car and a bus, heights are different from each other, so that the height adjusting device may be provided to examine the entire vehicle 500.

FIG. 4 is a schematic plan view of the detector and the computer device in the tower vehicle perspective apparatus shown in FIG. 2.

The detector 400 is disposed at one side of the radiation source 320, and the first, second, and third detection panels 420, 430, and 440 are disposed inside the detector 400. Each of the detection panels 420, 430, and 440 is arranged in an arc shape to maintain the same distance as the radiation source 320 while being separated from each other.

The electrical signals output from the detection panels 420, 430, and 440 are respectively input to three computers 710, 720, and 730 through signal lines 426. Computers 710, 720, and 730 use the input signal to generate the shape of an object as a video signal of a three-dimensional image, and display it on the connected monitors 715, 725, and 735, respectively. As shown in FIG. 4, the monitors 715, 725, and 735 are displayed with slightly different angles of view of the shape of the vehicle 500.

In this case, the image is configured to derive a gamma ray transmission image of 2 million pixels or more.

Computers 710, 720, and 730 used three IBM-compatible personal computers for real-time video signal processing, but one computer could perform all of them if the computational speed and storage capacity of the computer increased in the future. .

FIG. 5 is a cross-sectional view of one of the detection panels shown in FIG. 4, and FIG. 6 is a configuration diagram schematically illustrating only the signal pad 424 of the detection panel illustrated in FIG. 5. Eight detectors 422 are stacked inside the detection panel 420, and are divided into pairs, and between each pair of detectors 422, two rows of signal pads 424 for generating an electrical signal are provided. It is.

The detector 422 uses an electrode plate made of a material having a very high specific resistance, and has a thickness of about 2 to 3 mm.

In particular, the four pairs of signal pads 424 are not arranged in a line but arranged so as to overlap only a part of the signal pads 424 so that all of the radiation 325 irradiated to the entire detection panel 420 can be detected. Each signal pad 424 is connected to the corresponding computer 730 through a signal line 426.

Hereinafter will be described the operation of the tower vehicle detection apparatus according to the present invention.

First, in a state where the horizontal bar 300 is located at one side of the connection groove 210, the vehicle 500 moves between the viewing part 200 and the detection part 400 to stop.

Next, while opening one side of the radiation source 320 to radiate the radiation 325, the horizontal bar 300 by the transfer device 220 at a constant speed (in the experimental example, the transfer speed is about 6 m / min) Transfer. Then, the radiation 325 from the radiation source 320 passes through the vehicle 500 to reach the detection unit 400.

The radiation 325 arriving at the first, second, and third detection panels 410, 420, and 430 of the detector 400 emits electrons from each detector 422, and the electrons are detected by each signal pad 424. do. The electrical signal of the signal pad 424 is transmitted to the computer 730, converted into a three-dimensional image signal, and then displayed on the monitors 715, 725, and 735. Therefore, the examiner can look at the monitor, and can know what is inside the vehicle 500 in a three-dimensional image.

At this time, the radiation 325 is emitted by a line scan method, and an electrical signal is sampled every predetermined time (for example, 10 times per second), thereby making it possible to distinguish a cable having a precise image (about 0.5 cm thick in the experimental example). ) Can be obtained. If the resolution of the obtained image is to be adjusted, the feed rate and sampling period of the horizontal bar 300 may be appropriately adjusted, or the number of installation of the signal pad 424 may be adjusted. In this example, it took about 1 minute to search for a 16m long vehicle.

When the inspection of one vehicle 500 is completed, the horizontal bar 300 may be returned to the initial position, and the next vehicle 500 may be moved to repeat the perspective inspection.

In the present invention, the case in which three detection panels are arranged in an arc shape is illustrated and described. However, four, five, six, or seven or more detection panels may be closely arranged as necessary.

In the present invention, the perspective view is performed while the horizontal bar is moved while the vehicle being transported is stopped. However, the vehicle may be moved at a constant low speed while the horizontal bar is fixed.

Such a market value of the present invention can efficiently inspect vehicles entering and leaving the vehicle entrances such as military units, government offices, world cup stadiums, international conference halls, border zones and the like.

Examples of the detector used in the present invention include a multi-gap gas detector using a material having high specific resistance, a detector using crystal, a semiconductor detector using silicon, and the like.

In addition, since the vehicle is driven by the driving device 230, the parked vehicle may pass through while inspecting. In this case, the security can be further improved.

As described above, according to the tower vehicle perspective apparatus according to the present invention, there is a feature that can be quickly inspected the vehicle. In addition, by using a single radiation source and a plurality of detection plates, there is an advantage of accurately displaying the shape of a large vehicle without distortion by stereo vision.

In addition, even if weapons, drugs, and bombs are contained inside the vehicle, they can be caught quickly.

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.

Claims (4)

A source box 310 including a radiation source 320 therein for irradiating radiation toward the vehicle 500; Transfer means 220 for reciprocating the source box 310 in a horizontal direction; A detector 400 provided at one side of the source box 310 to detect radiation passing through the vehicle 500; A horizontal bar (300) having one end fixed to the source box (310) and the other end connected to the detection unit (400) to move the source box (310) and the detection unit (400) integrally; And Conversion means for converting the electrical signal of the detection unit 400 into an image signal, The detector 400 includes a detection panel 420 having a plurality of detectors 422 stacked therein. The detection panel (420) is a tower-type vehicle perspective apparatus, characterized in that arranged in an arc shape so that three to five at equal intervals with the radiation source 320 in the detection unit (400). The method of claim 1, wherein the conversion means, A plurality of computers (710, 720, 730) for receiving the electrical signals of the detection panel (420) to generate a video signal for the shape of the vehicle (500); And Tower type vehicle perspective apparatus comprising a plurality of monitors (715, 725, 735) for receiving and displaying video signals corresponding to each detection panel (420) from the computer (710, 720, 730). An initial step of stopping the vehicle 500 to be inspected at a designated position and moving the horizontal bar 300 to one side; A transfer step of transferring the horizontal bar 300 at a constant speed while emitting radiation 325 from the radiation source 320 toward the vehicle 500; A detection step of detecting the radiation 325 passing through the vehicle 500 by the detector 422 and converting the radiation 325 into an electrical signal; Generating a video signal of a 3D image by inputting the electrical signal to a computer (710, 720, 730); And And a display step of transmitting and displaying the video signal to a monitor (715, 725, 735). The method of claim 3, wherein in the conveying step the radiation 325 is emitted in a line shape, In the detecting step, the electrical signal is a perspective method of the tower vehicle perspective device, characterized in that the conversion per predetermined period.