JP2001324300A - Electric wave activation mine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric wave activation mine which solves the problem where, related to a mine which is buried under ground for exploding/distracting a mobile object and the like, a conventional mine is not utilized according to battle situation, and acts without telling friend from foe, while removing it is accompanied by danger and requires high technology and many hours. SOLUTION: There are provided an antenna for receiving a command signal transmitted from a place away from where buried under the ground, a receiver for detecting the command signal, a decoder for judging whether the command signal is a friend transmission signal or not, and a safety device where, based on the judging result, the mine is activated for initiation according to the signal if it is the command signal otherwise inactivated for prohibiting initiation. Thus, the buried mine is activated/inactivated on the command signal, and after buried, it functions for a foe while not functions for friend. When the buried mine is no longer required, it is removed in a short time while avoiding danger, so unwanted injury and destruction related to the remaining mine are avoided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mine buried in the ground, and more particularly to an antenna provided on the mine and activated or deactivated by radio waves received by the antenna. The present invention relates to a radio-activated mine that can be exploded immediately when conditions are satisfied, or can be prevented from exploding even when predetermined conditions are satisfied.

[0002]

2. Description of the Related Art When a physical quantity such as sound, vibration, magnetism, pressure (load) or the like which is buried in the ground becomes higher than a predetermined fixed level, or a trap line is pulled with a certain power or more. When mechanical contact occurs, such as being cut or cut,
Land mines that explode immediately, destroy vehicles such as special vehicles passing above the burial location, or kill passing personnel have been used extensively throughout the world, especially in conflict areas.

FIG. 6 is a cross-sectional view of a conventional land mine for special vehicles. As shown in the figure, the conventional anti-special vehicle mine 10 is driven by the load of the special vehicle running on the pressure plate 1.
The ring-shaped pressure-receiving rubber 2 disposed below the pressure plate 1 is compressed, and when the compression amount (load) exceeds a certain value, the ring-shaped pressure-receiving rubber 2 is suspended from the lower end of the spark plug 3 and the lower end of the percussion rubber 4 lowered by the compression amount. Contacts the fuze 5 and activates the fuze 5, ignites the explosive charge 6 by an electric signal or the like from the fuze 5, and explodes the explosive charge 7 filled on the outer periphery of the explosive charge 6 by the ignited explosive charge 6. The special vehicle running on the pressure plate 1 is destroyed by the explosive force.

[0004] Further, in the anti-special vehicle mine 10 shown in the figure, as described above, the fuze 5 is activated by the pressure of the running special vehicle due to the pressure, and as shown in the figure, the original An activating device 8 including a fuze different from the fuze 5 which is activated by sensing a physical quantity of a certain level or more is provided. After deactivating the fuze 5, let's remove this anti-special vehicle mine 10. When activated, the activating device 8 ignites the explosive charge 6 provided separately from the explosive charge 6 that is ignited by an electric signal or the like from the fuze 5 and explodes in the same manner. In other words, this anti-special vehicle mine 10 is
After performing the inactivation work described above, when the removal is attempted, the activation device 8 is activated by the tension of the rope connected to the pile 9 driven into the vicinity of the installation location, so that the explosion occurs. It has a double detonator.

FIG. 7 is a sectional view of a conventionally used antipersonnel land mine. As shown in the figure, a conventional antipersonnel mine 20 is attached to a trap line 11 that is provided to be exposed on the ground.
When a person coming in contact comes into contact and the trap line 11 is pulled or cut with a certain force or more, the trap line 11 receives a mechanical force more than the force set for the antipersonnel mine, or the upper end of the firing rod 12. When a load equal to or more than a predetermined value is applied, for example, by being stepped on by someone passing through, the firing rod 12 descends, and the firing rod 12
The lower end of the firing pin 13 mounted on the lower end of the lowering device lowers the discharging and igniting mechanism 15 with the primer 14 mounted on the upper end thereof, and the discharging agent 16 filled in the lower end of the discharging and igniting mechanism 15 When the lower end of the discharge and ignition mechanism 15 collides with the upper end of the, the explosive 16 is exploded.

Due to the explosion of the discharged medicine 16, the body of the antipersonnel mine 20 jumps and jumps out of the buried position to the ground, and the conductive medicine 17 is ignited. The fire of the ignited conductive medicine 17 is eventually released and ignited. 15 The primer 14 reaches the upper end of the primer and is ignited. By the firing of the primer 14, the explosive charge 18 filled on the outer periphery of the emission and ignition mechanism 15 and the conductive agent 17 is ignited. The hull of the antipersonnel mine 20 is crushed by the ignition and explosion of the explosive 18, and the munitions 19 filled around the explosive are scattered around the ground at a high speed, so that somebody or the shooting pin comes in contact with the trap wire 11. Anyone who steps on the upper end of the stick 12 or a person near the installation of the antipersonnel mine 20 is killed.

As described above, in either of the above-described conventional anti-special vehicle mine 10 and anti-personnel mine 20, the conditions set for each mine, that is, in the above-described conventional example, the explosion of the mine is caused by the mine being buried. Although the case in which the pressure (load) applied to the fuse becomes a certain value or more has been described, there is also a mine in which the fuse is made to explode in response to a certain physical quantity such as sound, vibration or magnetism. In this way, conventional land mines are designed to explode as soon as they meet the conditions above a certain physical value set for the land mines.
There was a problem that it could not be used in response to detailed situations.

That is, when an enemy special vehicle or the like travels in an area where a mine is installed, particularly when traveling in a parallel state, only the leading special vehicle is damaged. However, there is also a problem that the following special vehicle can avoid the damage by traveling around the area corresponding to the situation of the preceding special vehicle, and the cost-effectiveness of land mine installation cannot be improved.
In addition, there is the issue of demining at end-of-conflict locations around the world that has recently attracted the attention of people around the world. In other words, as described above, landmines installed during a conflict will explode immediately if they meet the conditions above a certain value set for the landmine. In addition, when burying land mines, it is normal for the enemy to bury the land as much as possible, so it is not easy to search for the land. However, removing land mines that are always ready to explode, even if they have been able to search for a buried site, requires a high level of skill and time to deactivate the fuze,
In addition, there is a problem that the removing worker is at risk of explosion.

[0009]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems of conventionally used land mines.
It is possible to remove land mines after remediation without any danger in a short period of time, and when land mines are required, the efficiency of land mine installation, that is, the use of land mines used for destruction and damage of installed mines By increasing the number, the installation efficiency can be increased.Furthermore, the radio activity that enables the mine to be activated or deactivated by identifying the enemy or ally, so that the mine can be effectively used in response to a small situation The challenge is to provide land mines.

[0010]

Therefore, the radio-activated land mine of the present invention has the following means.

(1) When a moving object such as a vehicle or a person buried in the ground and passing above satisfies a predetermined condition of a physical quantity such as sound, vibration, magnetism or pressure which is initially set, Activate the fuze to explode the explosive, destroy and damage moving objects.An antenna that receives a command signal transmitted from the position away from the mine installation position to the mine installation position is provided. Was.

The transmitted command signal has a very large attenuation factor when passing through the ground, and the antenna is mounted on the ground to prevent the mine installation position from being easily detected by the enemy by visual inspection. It is preferable to provide it at a shallow position as close as possible to the camera. In addition, since the command signal passes through the ground where the attenuation rate is very large and is received by the antenna, even if the command signal is installed at a shallow position near the surface of the earth, there is a local difference in the attenuation rate of the command signal received by the antenna. It is preferable that the antenna is installed so that the installation depth of the antenna is constant in order to prevent the occurrence of the problem.

(2) A receiver is provided for inputting a command signal received by an antenna and detecting the command signal by removing noise and the like from the command signal so that the received command signal can be identified.

(3) Determine whether the command signal detected by the receiver is transmitted from an ally or an enemy.
A decryption device for determining under predetermined conditions was provided.

(4) When the result of the judgment by the decoder is input and it is judged that the command signal received from the judgment result is transmitted from the ally, the fuze can be detonated by operating based on the command signal. Activation (ARM state), or deactivation of the fuze to detonate mines so that harmless traffic or safe demining is possible (SA)
(FE state).

(A) With this, the buried mine can be activated or deactivated by a command signal from the outside so that the fuze for detonating the mine can be activated or deactivated. Depending on the situation, the mine can exert its original functions as a mine, and it can also prevent allies from causing damage or destruction to moving objects such as personnel, vehicles, etc. You can use landmines to your advantage. In addition, since the original functions of land mines can be exhibited in response to detailed war conditions, damage and destruction efficiency due to the installed mines, that is, the number of installed mines that can exhibit the original functions of the land mines Can be increased.

In addition, land mines that have been retired due to the resolution of a dispute or the like can be removed by deactivating the fuze so that they do not operate, thereby avoiding the dangers associated with removal and greatly reducing the removal time. This makes it less likely that the mine will be left unremoved after the dispute is settled, thereby preventing indiscriminate damage and destruction of personnel, vehicles, etc. by the abandoned mine.

The radio-activated land mine according to the present invention employs the following means in addition to the above-mentioned means (1) to (4).

(5) The antenna is formed in a ring shape on the top surface of the mine body charged with explosives, is horizontally arranged at a position shallow from the surface of the mine, and a receiver, a decryption device and a safety device are accommodated in the mine body. It was taken.

(B) Accordingly, in addition to the above (a), the transmitted command signal has a very large attenuation factor when passing through the ground, and the antenna needs to be installed at a shallow position very close to the ground surface. In addition, since the signal passes through the ground where the attenuation factor is very large, it is necessary to install the antenna so that the installation depth is constant to prevent local differences in the attenuation factor. However, by embedding the mine body at the proper depth, making it annular on the top of the mine body, and arranging it horizontally, the above conditions required for the antenna are automatically satisfied. Can be.

The radio-activated land mine according to the present invention employs the following means in addition to the above-mentioned means (5).

(6) The antenna is not mounted on the upper surface from the mine body, but is horizontally arranged at a position separated from the installed mine and at a position shallow from the ground surface.

(C) As a result, in addition to the above (b), the antenna can be installed irrespective of the burial depth of the mine body, so that it can be easily visually detected by the enemy to reduce the attenuation rate of the command signal. It can be installed at the minimum depth that cannot be done. Also, the attenuation rate of the command signal increases as the water content of the volume increases, and it is necessary to reduce the depth of the skin covering the antenna upper surface for concealing the antenna,
Since the antenna is separate from the mine main body, it is possible to select a soil position with a small attenuation rate of the command signal and bury only the antenna, and achieve a high antenna efficiency that can receive the command signal with a small attenuation rate, and furthermore, the antenna Can be reliably concealed.

Further, the radio wave activated land mine of the present invention has the following means in addition to the above-mentioned means (6).

(7) The receiver and the decoder are not housed in the mine main body, and are arranged near the antenna which is arranged at a position separated from the mine main body.

(D) Accordingly, in addition to the above (c), the receiver, the decoder and the battery for the receiver and the decoder are not housed in the mine main body, but are installed near the antenna installation position separated from the mine main body. As a result, it is possible to minimize the amount of material removed when the mine is removed, to reduce the size of the mine body, or to increase the destructive power of the mine body with a fixed volume by charging an extra explosive charge. In addition, receiver,
Since there are no decipherers, the use of metal parts in the mine body can be minimized, making it more difficult to detect the mine body with a metal detector, etc. can do.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a radio wave activated land mine according to the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing a basic configuration employed in each embodiment of the radio wave activated land mine according to the present invention.

As shown in the drawings, in each embodiment of the present invention, a radio-activated land mine 100 buried and operated in the ground like a normal land mine is directed toward the embedding direction of the radio-activated land mine 100. An antenna 101 for receiving a transmitted activation / inactivation signal, a receiver 102 for removing noise and the like from a signal received by the antenna 101, restoring a waveform close to the transmitted signal and detecting the signal, A decryption device 10 which receives the received signal detected at 102 and determines whether or not the received signal is transmitted from an ally under a predetermined condition and discriminates the received signal.
3. As a result of the identification and determination by the decoder 103, when the received signal is from a friend, in order to prevent the mine from exploding even if the mine satisfies a certain condition or more based on the received command signal, The fuse 105 is activated and activated in order to deactivate the 105 so as not to operate and to explode when the mine satisfies a certain condition or more so that the mine can exhibit the destruction effect of the mine. The safety device 104 is capable of switching to the ARM state as described above and has a basic configuration.

In the figure, reference numeral 106 denotes a received signal from an ally, a received command signal instructing an ARM state, and a radio-activated land mine 100.
When the condition set at first is satisfied, the fuze 10
The explosive that is ignited by the operation of No. 5 and generates a destructive force.

FIG. 2 is a perspective view showing a first embodiment of the radio wave activated land mine according to the present invention.

As shown in the figure, in a radio-activated land mine 100 of the present embodiment, an explosive charge 106 is filled inside, and an antenna 101 formed annularly on the upper surface of a mine body 107 made of a non-magnetic material. Is provided horizontally.

The radio-activated land mine 100 in which the antenna 101 is provided in a ring shape on the top surface of the land mine body 107 is
Since it is buried in the ground like a normal land mine, and the radio-activated land mine 100 is buried in a substantially horizontal plane,
The antenna 101 can be placed underground such that the depth of the surface of the antenna 101 from the surface of the ground is small and the antenna 101 is kept horizontal. This prevents a local difference in the rate at which the command radio wave transmitted from the outside (ground) attenuates in the ground, and allows the command radio wave to be transmitted to the surface of the antenna 101 buried under the ground even under the ground. By placing it in a close part,
Receiving command radio waves is made easier. Antenna 101
Are detected by the receiver 102 and then output to the decryptor 103.

Decryptor 1 to which detected command radio wave is input
03 determines under predetermined conditions whether or not the input radio wave is a radio wave transmitted from an ally. If it is determined that the command is a correct command from the ally, the safety device 104 is activated, and the command radio wave is transmitted to the fuze. If the fuse 105 is to be deactivated and set to the SAFE state, the fuze 105 is changed from a detonable state to a safe state.
If so, the fuse 105 is changed from the safe SAFE state to the detonable ARM state.

Fuze 10 placed in detonable ARM state
5 is a predetermined condition or trap line where the physical quantity such as sound, vibration, magnetism or pressure fixed to the radio-activated land mine becomes more than a certain value necessary for activation. Explosive 1
Explodes with 06, killing and destroying personnel and vehicles. In the drawing, reference numeral 108 denotes the receiver 102 and the decryptor 10
3 is a battery for a receiver / decryptor for the operation of 3; 109 is a battery for a safety device for the operation of the safety device 104;

The radio-activated land mine 100 of the present embodiment
Since it is configured as described above, unlike a conventional land mine, the fuze 105 can be set to any of the ARM state and the SAFE state by an external command radio wave.
The fuze 105 can be activated / deactivated according to the war situation even after the burial, and the mine's original effect can be exerted according to the war situation. It is also possible not to let them.

That is, the decryptor 103 uses the antenna 101
By judging the command radio wave received by the enemy, it is possible to identify the enemy and ally, and it can be regarded as "safe mine for the ally even after burying", and furthermore, the enemy vehicle traveling in the parallel state Until most vehicles reach the mine location.
By leaving the vehicle in the AFE state and entering the ARM state after the vehicle arrives, not only the leading vehicle but also the following vehicle or the vehicle that retreats can be damaged. Many of the installed mines are effectively used for damage and destruction, and In addition, the efficiency of destruction can be increased, and land mines can be used to advantage for allies in response to a narrow war situation. Further, when the land mines after being used up are removed, the fuses 105 can be removed without any danger of landmine explosion by inactivating the fuze 105 by a command signal so that the mine is not detonated and not operating. Thus, it is possible to avoid the danger associated with the removal and shorten the removal time.

FIG. 3 is a graph showing the frequency of radio waves, the water content in the ground, and the antenna 101 according to published documents to demonstrate that the above-mentioned radio-activated land mine 100 is feasible.
5 is a graph showing the relationship between the depth of the ground surface skin until the radio wave intensity received at the time attenuates by 8.68 db. That is, from the definition of “skin depth” shown on the vertical axis, the radio wave is attenuated by 8.68 db at each depth, and the magnitude of this attenuation is approximately 60% It is the depth that falls.

From this figure, when the radio wave of the frequency of 1.3 GHz is selected as the frequency of the command radio wave from the outside to the radio wave activating land mine 100, even if the depth of the skin is the worst clay layer, the water content of the volume is It is clear that if the clay layer satisfies the condition of 0.3 g / cm ³ or less, 10 cm or more can be secured, and the radio wave activated land mine 100 can be concealed sufficiently.

Therefore, by setting the depth of the antenna 101 buried in the ground to 10 cm or less, the radio wave activation according to the situation can be performed by remote control using a command radio wave capable of securing a propagation distance of about 60% in the atmosphere. It is possible to activate the activated land mine 100 in a detonable state, and to deactivate the radio-activated land mine 100 in a safe state for harmless traffic or safe mine removal by allies from a practical effective distance. You can see that.

Next, FIG. 4 is a perspective view showing a second embodiment of the radio-activated land mine according to the present invention.

As shown in the figure, a radio-activated land mine 200 according to the present embodiment has a mine body 107 buried in the ground like a normal mine, and a mine body separated from the mine body 107 and separated from the mine body. And the antenna 2 horizontally with a shallower surface
01 is different from the radio-activated land mine 100 of the first embodiment in that it is embedded. The antenna 201 buried near the ground surface is also buried so that the depth of the antenna 201 from the ground surface is kept substantially constant, similarly to the antenna 101 in the first embodiment. This prevents the command radio wave transmitted from the outside (ground) from being locally attenuated in the rate of attenuation in the ground, and allows the command radio wave to be received even in the ground. It is easier than in 101.

Also in this embodiment, the command radio wave received by the antenna 201 is detected by the receiver 102 in the mine main body 107 and then sent to the decoder 103. Decryption machine 10
3 is an ARM state in which it is determined under predetermined conditions whether or not the received radio wave is a radio wave from an ally. If it is determined that the received radio wave is a correct command from the ally, the safety device 104 is activated and the fuze 105 can be detonated. From the safe SAFE state to the safe SAFE state, or vice versa.

Fuze 10 placed in detonable ARM state
5 indicates that when the sound, vibration, magnetism or pressure level exceeds a certain value, or when the trap line satisfies certain conditions due to mechanical contact drawn or cut by a certain force, the explosive charge 1
Explodes with 06, killing and destroying personnel and vehicles. Thus, unlike the conventional land mine, the radio wave activated mine 200 of the present embodiment is also different from the conventional land mine in the same way as the radio wave activated mine 100 of the first embodiment. It can be placed in either detonable / safe state, and even after burial, activation of the fuse 105 according to the war situation /
Inactivation is possible.

Further, by making a determination with the decryption device 103, an enemy or friend can be identified, and it can be determined that the mine is safe for the ally even after being buried. The same operation and effect as the land mine 100 can be obtained. Further, in this embodiment, the antenna 201 can be buried at a shallower depth irrespective of the buried depth of the radio wave activated mine 200, so that the attenuation of the command signal for commanding the ARM state / SAFE state can be reduced. Since the antenna 201 can be made to have a high antenna efficiency to receive a more accurate command signal, the fuze 105 can be activated / deactivated more reliably. Conversely, the transmission of the command signal to the radio wave-activated mine 200 can be performed at a longer transmission distance that can be performed from a remote place.

Further, since the antenna 201 can be installed separately from the mine body 107, the antenna 201 whose attenuation rate changes depending on the soil and water content as shown in FIG. Can be selected and installed at a location with a low reception attenuation of soil and water content, thereby reducing the attenuation of the command signal and enabling more accurate reception of the command signal.

Next, FIG. 5 is a perspective view of a third embodiment of the radio wave activated land mine according to the present invention.

As shown in the figure, the radio-activated land mine of this embodiment has a fuse 105 and an explosive 106 similar to a normal land mine.
, A mine body 301 buried in the ground, an antenna 301 buried horizontally at a shallower depth from the ground separately from the mine body 301, a receiver 302 mounted near the antenna 301, and a decoder 303, a receiver / decryptor battery 308. The safety device 104 and the battery 109 for the safety device are provided in the mine main body 107 as in the first and second embodiments.

As in the second embodiment, the antenna 301 of this embodiment is also separated from the mine main body 107 at the embedding position, and the antenna 301 buried near the ground separately from the mine main body 107 is an antenna from the ground. It is buried horizontally so as to reduce the depth to 301 and keep the depth substantially constant. As a result, it is possible to prevent a local difference in the rate at which the command radio wave transmitted from the outside (ground) attenuates in the ground, and to receive the command radio wave even in the ground, as in the second embodiment. Easy to be with.

The command radio wave received by the antenna 301 is
After being detected by a receiver 302 provided near the antenna 301, a decoding device 3 similarly provided near the antenna 301
Sent to 03. The decryption device 303 determines under predetermined conditions whether or not the received radio wave is a radio wave from an ally, and if it determines that the received radio wave is a correct command from the ally, it determines the result of the determination as a safety command installed in the mine body 107. It communicates to the device 104 and activates the safety device 104 to change the fuse 105 from a detonable ARM state to a safe SAFE state or vice versa from a safe SAFE state to a detonable ARM state.

Fuze 105 put in ARM state that can be detonated
Is a predetermined condition, that is, a condition in which the magnitude of sound, vibration, magnetism or pressure set in the radio-activated mine 300 is equal to or greater than a certain value, or a machine in which a trap line is drawn or cut by a certain force or more. Explosive 1
Explodes with 06, killing and destroying personnel and vehicles that have triggered certain conditions.

As described above, the radio-activated land mine 300 of the present embodiment is different from the conventional land mine similarly to the radio-activated land mines 100 and 200 of the first and second embodiments, and is different from the conventional land mine. The radio wave activated land mine 300 can be placed in either a detonable / safe state by the command radio wave, and the fuze 105 can be activated / deactivated so as to be advantageous to allies according to the war situation even after the mine is buried. . Further, by making a determination with the decryption device 103, an enemy or friend can be identified, and the mine can be regarded as “a safe mine for the ally even after burying”. The same operation and effect as those of the land mines 100 and 200 can be obtained.

Further, the radio-activated land mine 3 of the present embodiment
In the case of 00, similarly to the radio-activated land mine 200 of the second embodiment, the transmission of the command signal to the radio-activated land mine 300 can be performed at a longer transmission distance that can be performed from a remote place. Further, since the antenna 301 can be installed separately from the mine main body 107, the antenna 301 whose attenuation rate changes depending on the soil and water content as shown in FIG. It is possible to select and install a place with less soil and moisture content, and to receive more accurate command signals.

The radio-activated land mine 30 of this embodiment
0, the receiver 302, the decryptor 303, and the receiver / decryptor battery 308 are also provided outside the antenna 301.
Mine body 1
At the time of recovery of 07, the weight of the mine main body, which still has the danger of explosion at the time of recovery, can be minimized, the size of the mine main body 107 can be reduced, and in the case of the mine main body 107 of the same capacity, the destructive power is increased. be able to. In addition, mine body 1
07 can be expected to suppress the use of metal parts, making it more difficult to detect the mine main body 107 and exhibiting more effects.

[0055]

As described above, the radio-activated mine of the present invention is located at the position where the mine is buried in the ground to activate the fuze, explode the explosive, and destroy and damage the moving object. An antenna that receives a command signal transmitted from a position away from the mine toward the mine installation position, a receiver that inputs and detects a command signal received by the antenna, and a command signal detected by the receiver is transmitted from an ally Determining whether or not it is a predetermined condition, the result of the judgment by the decoder is input, and when the command signal is judged to be from an ally, it can operate based on the command signal and detonate the fuse with a mine It was made of a safety device that was activated to make it inactive or inactivated so that it could not be detonated.

With this arrangement, the buried mine can be activated or deactivated by the command signal, and the fuze can be activated or deactivated by the command signal. On the other hand, it is possible to use land mines corresponding to detailed war situations without causing damage or destruction to moving objects such as personnel and vehicles, and to enhance the efficiency of destruction and destruction of installed mines.

Further, since the used mine can be removed by deactivating the fuze, the danger associated with the removal can be avoided and the removal time can be greatly reduced, and the used mine is less likely to be left without being removed. , Unnecessary personnel and vehicles can be prevented from being damaged or destroyed.

The radio-activated mine according to the present invention has an antenna formed in an annular shape on the upper surface of the mine body filled with explosive and disposed horizontally at a position shallow from the surface of the mine. It was housed inside.

As a result, the antenna can be installed horizontally at a shallow position very close to the ground surface, and there is no local difference in the attenuation factor.
The antenna can receive a uniform command signal with a small attenuation rate, and can accurately receive a command signal from a remote place.

In the radio-activated land mine of the present invention, the antenna is disposed at a position separated from the mine main body, and is disposed horizontally at a position shallow from the surface of the ground.

Thus, the antenna can be installed irrespective of the burial depth of the mine body, the attenuation rate of the command signal can be further reduced, and the antenna can be installed at the minimum depth that cannot be easily detected. A soil position with a small attenuation rate of the received command signal can be selected and buried, and a command signal with a small attenuation rate can be received and antenna efficiency can be increased.

Further, the radio-activated mine of the present invention is arranged such that the receiver and the decryption device are not housed in the mine main body, but are located near an antenna arranged at a position separated from the mine main body. .

As a result, it is possible to minimize the removal of the explosion danger at the time of demining, and to minimize the demining of the demining body only. The use of metal parts is suppressed, making the detection of the mine body more difficult, and the original effects of the mine can be fully exhibited.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a basic configuration employed in first to third embodiments of the radio-activated land mine according to the present invention;

FIG. 2 is a perspective view showing a first embodiment of a radio wave activated land mine according to the present invention,

FIG. 3 shows the frequency of the command signal, the water content in soil and 8.68d.
b is a diagram showing the relationship with the depth of the skin until the attenuation,

FIG. 4 is a perspective view showing a second embodiment of the radio-activated land mine according to the present invention,

FIG. 5 is a perspective view showing a third embodiment of the radio-activated land mine according to the present invention,

FIG. 6 is a cross-sectional view showing a conventional anti-special vehicle mine,

FIG. 7 is a sectional view showing a conventional antipersonnel land mine.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 pressure plate 2 pressure receiving rubber 3 squib 4 firing rubber 5 fuze 6 explosive charge 7 explosive charge 8 activating device 9 stake 10 mine for special vehicle 11 trap wire 12 firing rod 13 firing pin 14 priming 15 release and ignition mechanism 16 release agent 17 Conducting medicine 18 Explosive charge 19 Ammunition 20 Antipersonnel mine 100 Radio-activated mine 101 Antenna 102 Receiver 103 Decryptor 104 Safety device 105 Fuze 106 Explosive charge 107 Mine body 108 Receiver / decryptor battery 109 Battery for safety device 200 Radio activity Land mine 201 Antenna 300 Radio-activated land mine 301 Antenna 302 Receiver 303 Decryptor 308 Receiver / decryptor battery

Claims (4)

[Claims] When a predetermined condition set by a moving object buried in the ground and passing above is satisfied, a mine that activates a fuse and explodes an explosive to destroy or damage the moving object is separated. Antenna for receiving a command signal transmitted from the position, a receiver for detecting the command signal received by the antenna, and a decoder for determining whether the detected command signal is transmitted from a friend And a safety device for activating or deactivating the fuze on the basis of the command signal when the command signal is transmitted from a friend. 2. The antenna according to claim 1, wherein the antenna is formed in a ring shape on an upper surface of the mine body filled with the explosive, and is disposed horizontally at a position shallow from the surface of the mine. The radio-activated land mine according to claim 1, wherein the mine is housed in a mine. 3. A radio-activated land mine according to claim 2, wherein said antenna is disposed at a position separated from an upper surface of said mine main body, and is horizontally arranged at a position shallow from the ground surface. 4. The apparatus according to claim 1, wherein the receiver and the decryptor are not housed in the mine body, but are arranged near the antenna disposed at a position separated from the mine body. 3 radio activated mines.