JPH0712756A - X-ray inspecting vehicle - Google Patents

Abstract

PURPOSE:To provide an X-ray inspecting vehicle having high inspection efficiency, while requiring a short inspection time per specimen, and having the capability to move to the next inspection process immediately after the finish of the inspection of one specimen. CONSTITUTION:A delivery port 14 is formed at the left side 11 of a vehicle 1, while a discharge port 15 is formed at the right side 12 thereof. The vehicle 1 is internally provided with a transport mechanism 16 for shifting a specimen 13 from the delivery port 14 to the discharge port 15 so that the specimen 13 delivered from the left side of the vehicle 1 can be discharged from the right side thereof. Also, sets of X-ray generators and X-ray detectors are arranged in such a way as sandwiching the travel space of the specimen 13 on the mechanism 16, and two such sets are arranged so as to be separate from each other along the travel direction of the specimen 13. According to this construction, the whole image of even the specimen 13 having a size of length LX2/3 (maximum allowable inspection length) can be provided, simply when the specimen 13 is shifted over a distance of LX1/2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for inspecting air cargo, ship cargo, etc. by X-rays, and more particularly to an X-ray inspection vehicle equipped with an X-ray inspection apparatus and going to a desired place for inspection. is there.

[0002]

As an apparatus of this type, an X-ray generator for irradiating an object to be inspected with X-rays and an X-ray detector for detecting transmitted X-rays face each other in an inspection room at the rear of a vehicle. There is known a type of device which is provided together and carries in an object to be inspected into the inspection room from the rear end of the vehicle, carries out an X-ray transmission inspection, and then carries out from the rear end of the vehicle (for example, Japanese Patent Laid-Open No. Sho 60-58). -2608
No. 31, No. 61-205851, No. 63-67552, etc.).

[0003]

However, since the conventional apparatus carries in and out the inspected object to and from the inspection room from the loading / unloading port provided at the rear end of the vehicle, one inspected object can be inspected. Even if the inspection is completed, the next inspection cannot be carried in until the inspection is taken out of the inspection room, resulting in poor inspection efficiency. Further, since all the conventional apparatuses have only one set of the X-ray generator and the X-ray detector in the moving direction of the inspection object, in order to obtain a perspective image of the entire inspection object. It is necessary to move the inspected object by the length of the inspected item, and moreover, it is necessary to reciprocate back and forth along the carry-in route at the time of unloading. Therefore, it is difficult to shorten the inspection time per inspected item. there were.

The present invention was devised under such circumstances, and its purpose is to shorten the inspection time per inspected object, and immediately after the inspection of one inspected object is completed. An object of the present invention is to provide an X-ray inspection vehicle with high inspection efficiency that can shift to other inspections.

[0005]

In order to achieve the above object, an X-ray inspection vehicle of the present invention has an entrance for an object to be inspected formed on one of the left and right side surfaces of the vehicle and the other side surface. A transport mechanism is provided in the vehicle for moving the inspected object from the carry-in port to the unloading port, and the inspected object carried in from one side surface of the vehicle on the other side is provided. It is configured so that it can be carried out from. The set of the X-ray generator and the X-ray detector is arranged so as to sandwich the movement space of the inspection object by the above-mentioned transport mechanism, and at least two sets are provided so as to be separated from each other in the movement direction of the inspection object.

[0006]

In the X-ray inspection vehicle of the present invention constructed as described above, the object to be inspected is carried into the vehicle from one of the left and right side surfaces of the vehicle, and the X-ray generator is used to move the X-ray. It is irradiated and the transmitted X-rays are detected by an X-ray detector. The object to be inspected, which has undergone the X-ray transmission inspection, is moved to the carry-out port on the other side surface by the carrying mechanism and carried out of the vehicle. In this way, the inspected object can be carried into and out of the vehicle one-way, so that the operation of unloading the inspected object and the next operation of the inspected object can be performed at the same time. Therefore, even if there are many objects to be inspected, the inspection can be performed efficiently. Further, by providing at least two sets of the X-ray generator and the X-ray detector spaced apart from each other in the moving direction of the object to be inspected and using them at the same time, a perspective image of the whole one object to be inspected is obtained. Therefore, the moving distance of the inspected object required for the
The inspection time per hit can also be shortened.

[0007]

1 shows an embodiment of an X-ray inspection vehicle of the present invention. FIG. 1A is a schematic configuration diagram of the X-ray inspection vehicle as seen from the left side, and FIG. 1B is a schematic configuration diagram of the X-ray inspection vehicle as seen from above. , A passenger seat 3 is provided on the left side, and a control room 4 for X-ray inspection is provided adjacent to and behind the passenger seat 3. In this vehicle 1,
The area where people can enter during X-ray inspection is the control room 4
Is a region on the front side of the vehicle, and the vehicle compartment region of the vehicle 1 is divided into front and rear by a partition wall 5 with the control chamber 4 as a boundary. Partition wall 5
The area on the rear side partitioned by the partition wall 5 from the rear end of the vehicle 1.
The X-ray inspection room 6 occupies most of the space up to, and a control panel 7, a power supply 8 and an air conditioner 9 are provided in the space between the X-ray inspection room 6 and the partition wall 5.

The X-ray examination room 6 is formed so as to be entirely surrounded by a shield wall 10, and the left and right side walls 11, 12 and rear side walls thereof form a part of the side wall of the vehicle 1. Carrying in / out of the inspected object 13 into / out of the X-ray inspection chamber 6 is performed at the center of the side walls 11 and 12 of the X-ray inspection chamber 6 forming the left and right side walls of the vehicle 1.
Carry-out ports 14 and 15 (here, carry-in port 14 is on the left and carry-out port is on the right
15) is provided. At the bottom of the X-ray inspection room 6, a transfer mechanism 16 is provided so as to connect the carry-in port 14 and the carry-out port 15, and the object carried in from one side surface (here, the left side surface 11) of the vehicle 1 is installed. Place the inspection object 13 on the other side (right side here)
It can be carried out from 12). Loading / unloading port 1
4, 15 are opened and closed by a slide-type opening / closing means 23 provided inside the side walls 11, 12. As shown in FIGS. 2 to 3, the opening / closing means 23 includes a shielding door 17 made of the same X-ray shielding plate as the wall material of the shielding wall 10, and strip-shaped X-ray shielding sheets 18 in three or more rows. It has a double structure of a shielding curtain 19 which is hung so as to be arranged side by side and alternately stacked, and both can be slid separately by a drive mechanism (not shown). In the X-ray examination room 6,
Two X-ray generators (X-ray tubes) 20R and 20L and an X-ray detector 21R are sandwiched across the moving space of the inspection object 13 by the transport mechanism 16.
21L and is provided. That is, the right X-ray generator
Two sets of X-ray inspection system 22R with one set of 20R and X-ray detector 21R and one set of left X-ray generator 20L and X-ray detector 21L
, 22L are provided separately from each other in the moving direction of the inspection object 13. In this case, X with the shielding wall 10 closed
The movable range of the inspection object 13 in the line inspection room 6 is shown in FIG.
Range of the length L of 2 sets of X-ray inspection system 22R,
22L is provided at a position that divides the length L into three equal parts. The length of the inspected object 13 is L × 2/3.

The upper limit of the tube voltage of the X-ray generators 20R and 20L is set to a high voltage of about 300 kV, and the X-ray inspection room 6 has the shielding walls of the loading / unloading ports 14 and 15 on both sides thereof. Closing 10 makes it possible to sufficiently shield such high-intensity (over 150 kV) X-rays. If the tube voltage of the X-ray generators 20R and 20L is 150 kV or less, the X-ray can be sufficiently shielded by using only the shielding curtain 19 as shown in FIG.

The X-ray inspection vehicle of this embodiment having the above-described structure can be used when the object 13 to be inspected is a small object (X-rays are easily transmitted) and when it is a large object (X-rays are not easily transmitted). The method of use can be appropriately changed to perform the examination efficiently.

For example, when inspecting a large number of small inspected objects, a shielding curtain 19 is used as shown in FIG. 2 and the tube voltage of the X-ray generators 20R and 20L is set to 150 kV or less. Then, the object 13 to be inspected can be carried into the X-ray inspection room 6 one after another through the shielding curtain 19, and can be passed one after another to perform the X-ray transmission inspection.

Also, a large inspection object (length 2/3 L or less)
In the case of inspecting, the inspection object 13 is carried into the X-ray inspection room 6, and then both shielding walls 10 are closed as shown in FIG.
X-ray transmission inspection is performed by setting the tube voltage of the line generators 20R and 20L in the range of 150 kV to 300 kV. In this case, since two sets of X-ray inspection systems 22R and 22L are provided with the above arrangement, for example, an object to be inspected having a length of 2/3 L (maximum inspectable length)
Even if 13 is moved by 1/2 L, the whole picture can be obtained. As described above, since the moving distance of the inspection object 13 can be shortened, the inspection time per inspection object can be shortened. Further, since the inspection object 13 can be carried into and out of the X-ray inspection room 6 in a one-way manner, it is possible to carry out the carrying-out operation of the inspection object 13 that has completed the inspection and the carrying-in operation of the next inspection object 13 at the same time. Therefore, even if there are many inspection objects 13, the inspection can be performed efficiently.

Under the current Road Traffic Law, the width of vehicles that can run on public roads is restricted to 2.5 m or less,
In the case of the present embodiment, the inside dimension of the vehicle (the above movable range L) is
If it is 2,200 mm, the maximum size that can be inspected is 3
1 / 2.400 mm, movement range (X-ray inspection system 22R
, 22L) is a third, 700 mm.

Further, in the conventional inspection device of this kind, the inspection is not realized by setting the X-ray tube voltage to 140 kV or more, and the tubes of the X-ray generators 20R and 20L are arranged as in this embodiment. Since the voltage can be set to 140 kV or higher, it is possible to obtain a transmission image of not only large cargo but also a large specific gravity that cannot be inspected by conventional equipment. For reference, a comparative example when the X-ray tube voltage is 140 kV and 300 kV is shown.

[Comparative Example] X-ray tube voltage (kV) Inspection object Penetration capacity (mm) 140 Iron 15 140 Water (ice) 150 300 Iron 65 300 Water (ice) 500

[0016]

In summary, according to the X-ray inspection vehicle of the present invention, since the moving direction of the object to be inspected is one direction from one side surface of the vehicle to the other side surface, the object to be inspected has been inspected. The carrying-out operation and the next carrying-in operation of the object to be inspected can be performed at the same time, and the inspection can be performed efficiently. In addition, since at least two sets of the X-ray generator and the X-ray detector are spaced apart from each other in the moving direction of the object to be inspected, and a transmission image is obtained by using these at the same time, the whole of one object to be inspected is obtained. The movement distance of the object to be inspected necessary to obtain a perspective image can be shortened,
The inspection time for each inspected object can be shortened.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of an X-ray inspection vehicle according to the present invention, in which (a) is a schematic configuration diagram when viewed from the side;
(B) is a schematic block diagram when it sees from above.

2 is a main part plan view showing an example of an execution state of inspection in the X-ray inspection vehicle shown in FIG. 1 (in the case of small item inspection).

3 is a main-portion plan view showing an example of an execution state of an inspection in the X-ray inspection vehicle shown in FIG. 1 (in the case of a large inspection).

[Explanation of symbols]

 1 Vehicle 6 X-ray inspection room 10 Shielding wall 11 Left side wall 12 Right side wall 13 Inspected object 14 Carry-in / carry-out port (carry-in port) 15 Carry-in / carry-out port (carry-out port) 16 Transfer mechanism 17 Shield door 18 X-ray shielding sheet To 19 Shield curtain 20R X-ray generator (X-ray tube) 20L X-ray generator (X-ray tube) 21R X-ray detector 21L X-ray detector 22R X-ray inspection system 22L X-ray inspection system

Claims (1)

[Claims] 1. An inlet for an object to be inspected is formed on one side surface of a vehicle, and an outlet is formed on the other side surface of the vehicle, and the object to be inspected is moved into the vehicle from the inlet to the outlet. And a pair of an X-ray generator and an X-ray detector facing each other with the moving space of the object to be inspected by the carrier mechanism provided apart from each other in the moving direction of the object to be inspected. X-ray inspection vehicle.