JP2000266843A - Mine detector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mine detector which can accurately detect in contact with the ground. SOLUTION: The mine detector has a cushion 3 fitted to a lower face of an underground search radar 2 using electromagnetic waves. A lower face of the cushion 3 is brought in contact with the ground to search for buried mines. The cushion 3 is formed to have an almost equal permittivity to the earth in the vicinity where mines are searched for. More preferably, the cushion 3 is constituted by sealing a liquid or gas in a bag formed of a flexible film to disperse a surface pressure.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mine detector used for detecting a mine buried underground.

[0002]

2. Description of the Related Art Generally, when excavating a mine buried underground, it is necessary to first search for the mine.
In this case, a mine detector is used. Conventionally, an underground survey radar using electromagnetic waves has been used as this mine detector. In this device, a plurality of antennas are arranged in a horizontal direction, and the presence or absence of an electromagnetic wave is detected by the antennas.

[0003]

However, in the above-mentioned land mine detector, the accuracy of land mine detection is not always good. That is, such a mine detector generally detects a mine by approaching the ground from the relation of the dielectric constant, but in this method, the mine detector is held at a predetermined distance from the ground and the mine detector is held. Since it has to be moved sideways, it requires a skill to operate. In addition, in the above method, since the distance from the ground surface is considerable, the detection accuracy is inferior. As a method of solving this problem, if the mine detector is quietly placed on the ground surface and operated, the mine can be detected accurately.

[0004] However, since at least the lower surface of such a mine detector is formed as a flat surface, if the surface of the ground has irregularities, the mine may explode due to excessive gravity acting on the convexities. Therefore, as described above, such a mine detector usually needs to be operated so as to have a predetermined interval from the surface of the ground, so that the reception accuracy of the electromagnetic wave by the antenna is not sufficient, and as a result, the detection accuracy of the mine decreases. It is supposed to.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems. A cushion is attached to the lower surface of an underground radar using electromagnetic waves. It is an object of the present invention to provide a mine detector that detects a buried mine with its lower surface in contact with the ground.

[0006] The cushion is configured to have substantially the same dielectric constant as the soil in the vicinity of exploring a land mine. More preferably, the cushion is configured such that a liquid or a gas is sealed in a bag body formed of a flexible film to disperse the surface pressure.

According to the mine detector having the above configuration, the lower surface thereof is brought into contact with the ground via the cushion, so that the antenna can receive the electromagnetic wave with high accuracy.
In this mine detection operation, since the underside of the cushion touches the ground surface, even if the ground surface is uneven, the gravity of the underground survey radar is widely dispersed, so even if the mine is buried in the convex part There is no risk of explosion.

[0008] As described above, it is important that the cushion applied to the present invention has a function of dispersing the load by deforming according to the convex portion when it comes into contact with the ground, and therefore, the amount of deformation is important. It is preferable to form a bag with a flexible membrane having a large size to form a fluid cushion. However, a soft mat-shaped cushion having the same function can be similarly applied, and in this sense, a mat-shaped cushion of this kind is also included in the technical scope of the present invention. is there.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a mine detector according to the present invention will be described below with reference to FIGS. In FIG. 1, reference numeral 1 denotes a mine detector.
Is constituted by an underground exploration radar 2 and a cushion 3 attached to a lower surface of the underground investigation radar 2. The underground exploration radar 2 is configured so that a plurality of antennas (sensors) 4 are dispersedly arranged along the surface of the cushion 3 to receive electromagnetic waves.

A cushion 3 is attached to the undersurface of the underground exploration radar 2 by a mounting bracket 5 so that it can be attached and detached as necessary. As shown in FIG. 2, the cushion 3 is formed by arranging a plurality of partition walls 8 having communication holes 7 at predetermined intervals in a bag 6 formed of a flexible film such as rubber as shown in FIG. 2. The upper and lower flexible membranes are connected to form a bag 6
The interior is divided into small chambers to give shape retention. A liquid L is sealed in the bag 6. This liquid L
Is, for example, a predetermined amount of metal powder mixed in oil,
It is preferable that the dielectric constant is substantially the same as that of the soil in the area to be explored. In addition, although the landmine detection sensitivity of the landmine detector 1 is reduced, in the case where weight reduction is the first priority, the landmine detector 1 can be used even if it contains gas such as air.

The mine detector 1 constructed as described above is used by being attached to the other end of an arm 10 having one end attached to a traveling vehicle (not shown) via a joint 9 such as a universal joint.

The mine detector 1 configured as described above is
The mine is transported to a predetermined area for exploration, and the lower surface thereof, specifically, the lower surface of the cushion 3 is gently placed on the ground surface 11 so as to be in contact with the ground.

At this time, even if there are some irregularities on the ground surface 11 as shown in FIG. 3, since the lower surface of the cushion 3 is deformed along the irregularities, the weight of the land mine detector 1 is reduced by the convex portions 11a. There is no need to concentrate on As a result, even if the mine 12 is buried under the projection 11a, there is no possibility that the mine will explode. And
When a land mine is buried, the antenna 4 of the underground exploration radar 2 receives the electromagnetic wave and guides the signal to a display device or a storage device (not shown) to detect this.

Of course, the present invention is not limited to the above embodiment. An important point of the present invention is that a cushion is provided on the lower surface of the underground survey radar, and the undersurface of the cushion is grounded on the surface of the area to be explored to detect buried mines without explosion and accurately. On the point.

Therefore, various types of cushions can be appropriately selected and used, and the liquid or gas to be filled in the cushion is selected and used in accordance with the mine detection capability. Can be. Further, a mat-like material which is flexible and can be deformed in accordance with a convex portion of the ground, similarly to a cushion formed by a bag, can be used.

[0016]

As is apparent from the above description, according to the mine detector of the present invention, the cushion is provided on the undersurface of the underground radar, thereby preventing the explosion of the mine and improving the accuracy of the mine detection. There is an effect that can be.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view showing a mine detector according to the present invention.

FIG. 2 is a partially cutaway perspective view of one embodiment of a cushion used in the mine detector according to the present invention.

FIG. 3 is an explanatory diagram of a use state of the land mine detector according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Mine detector 2 Underground exploration radar 3 Cushion 4 Antenna 5 Mounting bracket 6 Bag 7 Communication hole 8
Partition wall 9 Joint 10 Arm 11 Ground surface

Claims (3)

[Claims] 1. A landmine detector characterized in that a cushion is attached to a lower surface of an underground radar using electromagnetic waves, and a landmine embedded is detected by contacting the lower surface of the cushion with the ground. 2. The cushion for a mine detector according to claim 1, wherein the cushion has substantially the same dielectric constant as the soil near the mine. 3. The cushion for a land mine detector according to claim 1, wherein a liquid is sealed in a bag made of a flexible film.