JPH0882675A - Proximity fuse device - Google Patents

Abstract

PURPOSE: To obtain a proximity fuse apparatus whose reliability is enhanced by a method wherein an operation is controlled surely by a simple constitution. CONSTITUTION: A fuse-operation judgment circuit 16 judges the existence of the operation of a fuse on the basis of target-distance information from a distance detection part 15 and on the basis of guidance information from a flying- object guidance part 17. In a state that the existence of the operation of the fuse has been judged, a fuse-starting delay circuit 19 is operated, and a warhead is ignited. In a state that the existence of the operation of the fuse has not been judged, the noise level of reflected waves is detected on the basis of the guidance information. When the noise level is at a prescribed level or higher, a target detection gate 14 is set so as to be variable, a distance-measuring operation is continued, and the same judgment operation is continued.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a proximity fuze device provided on a projectile such as a guided bullet guided in a target direction.

[0002]

2. Description of the Related Art Generally, a proximity fuze device emits radio waves from the flying object side, detects a reflected wave from the target flying object, determines the distance to the target flying object, and approaches the target flying object. In the state that it was detected, the fuse was activated to detonate the warhead.

By the way, in such a close fuze device, when the flying speed of the target flying object is high or the target flying object is flying at an extremely low altitude, there is a possibility that the fuze operation may malfunction. Have.

That is, in the former case, since the flying speed of the target flying object is high, the target flying object is positioned at a predetermined position while the reflected wave (reception wave) of the transmitted wave from the target flying object is detected. There is a problem that the fuse is activated and the warhead is detonated after passing through.

In the latter case, the radiated radio wave erroneously determines the reflected wave from the ground, sea, or building on the ground as the reflected wave from the target projectile, and activates the fuse to detonate the warhead. It has the problem of being lost. As described above, the conventional proximity fuze device has a problem that it causes a malfunction depending on the usage mode.

[0006]

As described above, the conventional proximity fuse device has a problem of poor reliability. The present invention has been made in view of the above circumstances, and has a simple configuration so that reliable operation control can be realized.
It is an object of the present invention to provide a proximity fuze device with improved reliability.

[0007]

The present invention is mounted on a flying object, radiates a substantially conical electric wave having a predetermined inclination angle in the traveling direction, and receives a reflected wave to detect a target distance. Distance detection means, determination means for comparing the guidance information for guiding the flying object to the target with the target distance detected by the distance detection means, and a determination means for determining whether or not the fuze is operating, and the determination means for operating the fuze. In a state where it is determined to be acceptable, a fuze starting means for detonating a warhead and a state in which the determination means determines that the fuze is not operating, the noise level of the reflected wave is detected based on the guidance information, and the noise level is predetermined. When the level is equal to or higher than the level, a proximity fuze device is provided with target detection gate control means for variably setting a target detection gate for a reflected wave from the predetermined direction received by the distance detection means according to the noise level. It was done.

[0008]

According to the above construction, the determining means determines whether or not the fuze is operating based on the target distance from the distance detecting means and the guidance information, and the fuze starting means is operated in a state where the fuze is operating. Detonate the warhead. Then, in the state where the determining means determines that the fuze is not operating, the noise level of the reflected wave is detected based on the guidance information, and when the noise level is equal to or higher than a predetermined level, the target detection gate of the target distance detecting means is variably set. Then, the distance measurement is continued and the same judgment operation is continued. As a result, reliable target detection according to various modes of the target becomes possible, and highly reliable operation control becomes possible.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows a proximity fuze device according to an embodiment of the present invention. A transmitting / receiving antenna 10 is connected to a circulator 11. The transmitter 12 is connected to the input end of the circulator 11, and the transmitter 12
The radio wave (transmission wave) from the antenna is guided to the transmitting / receiving antenna 10. As shown in FIG. 2, the transmitting antenna 10 is inclined by about 35 ° to 40 ° with respect to the traveling direction of the flying body 20 and radiates a radio wave from the transmitter in a substantially conical shape.

At the output end of the circulator 11,
The mixer 13 is connected, and at the output end of this mixer 13,
The target detection gate generator 14 is connected. The output end of the transmitter 12 is connected to the target detection gate generation unit 14, and the target detection gate for setting the target detection distance of the reflected wave (reception wave) according to the radio wave transmitted from the transmitter 12. And the terrestrial wave detection gate to the target detection unit 15.

The target detecting section 15 is composed of a Doppler filter circuit 15a, a detecting circuit 15b, an integrating circuit 15c and a level judging circuit 15d, and a fuze operation judging circuit 16 is connected to its output end. The target detection unit 15 detects the target distance based on the reflected wave input via the target detection gate generation unit 14 and outputs it to the fuze operation determination circuit 16.

A projectile guidance section 17 is connected to the fuze operation determination circuit 16, and guidance information is input from the projectile guidance section 17. The fuze operation determination section 16 has one output end connected to the target detection gate control circuit 18, and the other output end connected to a fuze start delay circuit 19. A warhead (not shown) is connected to the output terminal of the fuze start delay circuit 19 via a switch SW.

The fuze operation determination circuit 16 compares the target distance information from the target detection section 15 with the guidance information from the flying body guidance section 17 to determine the presence or absence of the fuze operation, and when the fuze operation is determined, The start signal is output to the fuze start delay circuit 19. Fuze start delay circuit 19 is a switch SW
Turn on to detonate the warhead.

The fuze operation determination circuit 16 outputs the determination signal and guidance information to the target detection gate control circuit 18 in a state where it is determined that the fuze is not activated. The target detection gate control circuit 18 detects the noise level of the reflected wave based on the guidance information and the determination signal, and when the noise level is equal to or higher than a predetermined level, generates a gate control signal according to the noise level. , To the target detection gate generator 14. The target detection gate generation unit 14 variably sets the target detection gate of the reflected wave based on the gate control signal. At this time, the terrestrial wave detection gate is kept at the initial width dimension.

In the above structure, the reflected wave received by the transmission / reception antenna 10 is input to the target detection gate generator 14 via the circulator 11 and the mixer 13, and the target detector 15 detects the target distance to determine the fuze operation determination unit. 16 is input. At the same time, the fuze operation determination unit 16 receives the guidance information detected by the flying body guidance unit 17 (see FIG. 1), and determines the target flying body 21 based on this guidance information and the target distance information. It is determined whether or not it is within the working distance, and in the state where it is determined that these are satisfied, the fuze operating signal is output to the fuze starting delay circuit 19. The fuze start delay circuit turns on the switch SW based on the input fuze actuation signal to detonate the warhead (not shown).

Further, the fuze operation determination section 16 determines the target flying object 21 based on the guidance information and the target distance information and also determines whether or not it is within the fuze operation distance, and these are not satisfied. When it is determined that the fuze operation is not possible, a fuze non-operation signal and guidance information are output to the target detection gate control circuit 18. The target detection gate control circuit 18 detects the noise level of clutter or the like due to the ground, ground building, sea surface, etc., based on the input fuze non-operation signal and guidance information.

Here, for example, as shown in FIG. 3, when the target flying body 21 is flying at an extremely low altitude and the flying body is heading toward the ground, the ground detected by the target detection gate control circuit 18 is detected. The noise level in the direction opposite to reaches a predetermined level or higher. Therefore, the target detection gate control circuit 18 is shown in FIG.
As shown in, a gate control signal for shortening the width of the target detection gate in the direction of high noise level is generated and output to the target detection gate generation unit 14. Target detection gate generator 14
Reduces the width of the target detection gate based on the input gate control signal to generate a gate in which the ground wave detection gate remains fixed, and outputs a reflected wave based on the target detection gate to the target detection unit 15. To do. The target detection unit 15 improves the detection probability of only the target flying object 21 without detecting the ground, the ground building, and the sea surface, continues the target distance detection operation as described above, and fuses the target distance information. It outputs to the operation determination circuit 16.

As described above, in the proximity fuze device, the fuze operation determination circuit 16 determines whether or not the fuze is activated based on the target distance information from the distance detection section 15 and the guidance information from the flying body guidance section 17. The fuze activation delay circuit is activated to detonate the warhead when it is determined that the fuze is operational, and when it is determined that the fuze is not activated, the noise level of the reflected wave is detected based on the guidance information, and noise is detected. Even if the level is above a predetermined level, the target detection gate is variably set, the distance measurement is continued, and the same determination operation is continued. According to this, even when the target flying object 21 flies at high speed,
Since the warhead detonation is performed based on the target distance information and the guidance information by tilting the beam forward, it is possible to perform a reliable hit and realize highly reliable operation control.

Further, according to this, since the target detection gate is variably set, it is possible to effectively prevent erroneous determination of the ground, the ground building, and the sea surface as the target flying object, and thus the ultra low altitude. A reliable target of the flying target flying object is realized, and highly reliable operation control is realized.

In the above embodiment, the transmitting / receiving antenna 1
The case where the radio wave is emitted from 0 and the reflected wave of the radio wave is detected to detect the target distance of the target flying object 21 has been described, but the present invention is not limited to this, and electromagnetic waves such as infrared rays and light are used. It is also possible to radiate and to detect the reflected wave to detect the target distance. Therefore, the present invention is not limited to the above-described embodiments, and it is needless to say that various modifications can be made without departing from the gist of the present invention.

[0021]

As described in detail above, according to the present invention, it is possible to provide a proximity fuze device which is capable of realizing reliable operation control with a simple structure and has improved reliability. it can.

[Brief description of drawings]

FIG. 1 is a diagram showing a proximity fuze device according to an embodiment of the present invention.

FIG. 2 is a diagram shown for explaining the operation state of FIG.

FIG. 3 is a diagram shown for explaining an operation state of FIG.

FIG. 4 is a diagram shown for explaining a variable state of the target detection gate of FIG.

[Explanation of symbols]

 10 ... Transmitting / receiving antenna. 11 ... Circulator. 12 ... Transmitter. 13 ... Mixer. 14 ... Target detection gate generator. 15 ... Target detection unit. 15a ... Doppler filter circuit. 15b ... Detection circuit. 15c ... Integrating circuit. 15d ... Level determination circuit. 16 ... Fuze operation determination circuit. 17 ... Flying body guidance unit. 18 ... Target detection gate control circuit. 19 ... Fuze start delay circuit. 20 ... the flying body. 21 ... Target flying object.

Claims (2)

[Claims] 1. A distance detecting means which is mounted on a flying object, radiates a substantially conical radio wave having a predetermined inclination angle in a traveling direction, receives a reflected wave and detects a target distance, and the flying object. The guide information for guiding the target to the target distance detected by the distance detecting means, and the judging means for judging the presence or absence of the operation of the fuze; A fuze starting means for detonating, and a noise level of the reflected wave is detected based on the guidance information in a state in which the fuze is not operated by the judging means, and when the noise level is equal to or higher than a predetermined level, A proximity fuze device comprising target detection gate control means for variably setting a target detection gate for a reflected wave from the predetermined direction received by the distance detection means according to a noise level. 2. The distance detecting means emits a substantially conical electromagnetic wave having a predetermined inclination angle in the traveling direction and receives the reflected wave to detect the target distance. Proximity fuze device.