JPH0560500A - Proximity fuse - Google Patents

Abstract

PURPOSE:To detect the existing direction of a target body correctly and, consequently, concentrate the fragments of a warhead to the target correctly with the optimum timing by a method wherein a proximity fuse device is provided with a device, loaded on a missile provided with the warhead and commanding the igniting operation of the explosive of the warhead when the missile has approached to the target. CONSTITUTION:A proximity fuse device is provided with a target detector 11, detecting reflected waves from the target body 20 having entered the path of projected beams and outputting detecting signals E1-E4 in accordance with the strength of signals in every guadrant, circuits 14, 17, comparing respective detecting signals from the target detector and judging the guadrant where the target is present, a means 15, detecting a relative speed between the target based on respective detecting signals from the target detector, and a delay means 16, delaying the signal SVC of the detected relative speed by a predetermined period of time and outputting a timing signal SDT. The title device is constituted so as to command the igniting operation based on the delayed timing signal and information SQ on the guadirant where the target is judged to be present.

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,
In particular, the present invention relates to a device mounted on a projectile equipped with a warhead and instructing an ignition operation of an ammunition of the warhead when the projectile approaches a target object.

[0002]

2. Description of the Related Art FIG. 4 shows the configuration of a proximity fuze device as an example of a conventional type. The configuration shown in the figure is
-3741 publication. In the figure, 41 is an oscillator, 42 is a directional coupler for extracting a part of the output of the oscillator, and 43 is a beam projecting a target object,
An antenna that receives the reflected wave from the target object, 44 guides the output of the directional coupler 42 to the antenna 44, and a circulator that receives the reflected wave signal received by the antenna,
45 is a mixer for mixing the output of the circulator and a part of the output of the directional coupler 42, 46 is a video amplifier for amplifying the output of the mixer, 47 is a target object and this device is mounted from the output signal of the video amplifier. Doppler filter that passes only the Doppler frequency component corresponding to the relative velocity difference with the flying object, 48 is a detector that detects the amplitude of the signal that has passed through the Doppler filter, and 49 is the threshold setting device for the output of the detector. Reference numeral 51 denotes a comparator for comparing with a predetermined threshold voltage set at 50, and 51 denotes an ignition circuit for performing control for exploding the warhead of the projectile based on the output of the comparator 49.

In the above structure, the signal transmitted from the antenna 43 is applied to the target object, and the reflected signal thereof is received again by the antenna 43, passes through the circulator 44, and is passed through the mixer.
At 45, it is mixed with a part of the output of the directional coupler 42, and after being amplified by the video amplifier 46, it passes through the Doppler filter 47,
The amplitude is detected by the detector 48. The output of the detector 48 is compared with the threshold voltage of the threshold setting device 50 in the comparator 49, and when it is higher than the threshold voltage, immediately or after a preset constant delay time, the ignition circuit 51 is activated, This causes the warhead of the flying object to explode.

Regarding the timing of bursting the warhead, as another known form, the relative velocity with the target object is determined based on velocity information from an external device (another device mounted on the projectile). There are proximity fuze devices which accordingly delay the output of the ignition signal and thereby activate the ignition circuit.

[0005]

Since the conventional proximity fuze device is constructed as described above, a flying object (eg, S
There is a problem in that it is not possible to send the optimum detonation timing signal for destroying relative speeds such as SM) to a low speed target such as a cruise flying vehicle or a rotary wing aircraft in a wide range.

A timing signal (explosion timing signal) for exploding the warhead based on velocity information from an external device
In the proximity fuze device in the form of sending the speed information, when the speed fuze device is mounted on a projectile that cannot input the speed information from the external device, or the external device cannot send the speed information due to the attack of the other party or is in a failure state. In this case, there is a problem that the detonation timing signal cannot be accurately transmitted to the warhead.

The present invention was created in view of the above problems in the prior art, and it is possible to accurately detect the direction of existence of a target object and to accurately focus the warhead bullets on the target object at an optimum timing. It is an object of the present invention to provide a proximity fuze device capable of

[0008]

In order to solve the above-mentioned problems, the present invention detects the relative velocity between the target object and the target object, instead of relying on an external device to detect the relative velocity. Means is provided and the output thereof is utilized to send out the optimum initiation timing signal.

Therefore, according to the present invention, there is provided a device mounted on a projectile carrying a warhead, and for instructing the ignition operation of the ammunition of the warhead when the projectile comes close to a target object. A projection beam is projected in a cone shape toward the front direction of the flying object in each quadrant of at least four quadrants divided in the omnidirectional direction around the center, and a reflected wave from the target object with respect to the projection beam is detected. A target detector that outputs a detection signal corresponding to the signal strength for each quadrant, and each detection signal output from the target detector are compared, and the existence quadrant of the target object is determined based on the result of the comparison. Circuit for detecting the relative speed between the target object based on each detection signal output from the target detector, and the timing signal by delaying the detected relative speed signal for a predetermined time. Output ; And a rolling means, proximity fuse device is provided which is characterized in that so as to direct the ignition operation on the basis of the delayed timing signal with the determined presence quadrant information was.

[0010]

According to the above-described structure, the relative velocity between the target object and the target object is detected by using the target detection signal for each quadrant from the target detector, and the detonation timing signal is set based on the relative velocity.
An intrusion quadrant detection signal of the target object is transmitted. Therefore, it becomes possible to accurately detect the existence direction of the target object and accurately concentrate the bullet pieces of the warhead at the optimum timing with respect to the target object.

Details of other structural features and operations of the present invention will be described using embodiments described below with reference to the accompanying drawings.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the configuration of a proximity fuze device as an embodiment of the present invention. The proximity fuze device of the present embodiment is mounted on a projectile equipped with a warhead, and is provided with a radio wave target detector 11, a relative speed detector 15 and a quadrant determiner 17 as main components. Output detection signal E1 ~
The E4 Doppler frequency component is a device for accurately concentrating and striking the projectiles of the warhead at the optimum timing with respect to the invading target object 20.

The radio wave target detector 11 used here is also used.
Is capable of detecting the existence direction of the target object 20 that enters the quadrant of at least four quadrants divided in the entire circumferential direction around the axis of the flying object. Here, a device in the case of being divided into four quadrants will be described as an example. Regarding this technique, for example, Japanese Patent Laid-Open No. 2-25700
It is disclosed in Japanese Patent Laid-Open Publication No. 2-59690.

Reference numerals AS and AR shown in relation to the radio wave target detector 11 indicate a transmitting antenna and a receiving antenna, respectively. Although not shown, the beam projected from the transmitting antenna AS is tilted in the forward direction of the flying object and set at a predetermined angle, and is projected in a cone shape in the entire circumferential direction of the aircraft axis of the flying object. In this case, the beam projection angle is set to an angle suitable for the relative speed with respect to the target object 20 in consideration of response characteristics and the like due to signal processing and the like.

The radio wave target detector 11 detects a reflected wave from the target object 20 invading the projection beam through the receiving antenna AR, and detects the level of the detection signal corresponding to the detected reflected wave at a predetermined threshold level. The detection signals E1 to E4 are output for each quadrant in comparison with the signal detectors 12a and 12b.
, To the signal comparator 14 and the relative speed detector 15, respectively. Further, the radio wave target detector 11 outputs decorrelation signals E ₀₁ and E ₀₂ indicating that the round-trip distance to the target object 20 is out of the range of the 1-bit propagation distance of the code, and the signal detectors 12a respectively. And send to 12b.

The signal detector 12a compares the correlated signal of the beam (E4) and the beam (E1) with the uncorrelated signal E ₀₁ , and based on the result of the comparison, the target object 20 is located within the set distance and the target When the object reflects the radio beam from the transmitting antenna AS, a detection signal is output and sent to the trigger pulse generator 13. Similarly, the signal detector 12b outputs a detection signal based on the comparison between the correlation signal of the beam (E3) and the beam (E2) and the decorrelation signal E ₀₂ , and sends the detection signal to the trigger pulse generator 13.

The trigger pulse generator 13 is composed of beams (E1) ...
A trigger pulse is generated in response to a momentary detection signal (output of the signal detectors 12a and 12b) that has detected the target object 20 at any one of (E4), and the quadrant determiner 17 and the detonation timing are generated as the latch signal S _L. It is sent to the generator 18. The signal comparator 14 is
As an example, as shown in FIG. 2, the output signal levels of the adjacent quadrant detection beams are compared with each other, which is composed of a commonly used comparator circuit. For example, in the level comparison of the beam (E1) signal and the beam (E4) signal, if the DC voltage of the beam (E4) signal (or beam (E1) signal) is higher, the binary signal “0” is output as the output of the comparator 2. (Or “1”) signal is output (see FIG. 3), and the quadrant determiner 17
Sent to. Similarly, beam (E2) signal and beam (E3)
The signal is output by the comparator 1 to the beam (E4) signal and the beam.
The (E3) signal is compared by the comparator 3, the beam (E1) signal and the beam (E2) signal are compared by the comparator 4, and each binary signal output is sent to the quadrant determiner 17. It has been found from the test results that the comparison of the DC voltage levels is detected within the level difference of about 0.5 dB.

The relative velocity detector 15 pulse-shapes the Doppler shift frequency component at the time of target detection included in each detection signal E1 to E4 from the radio wave target detector 11, and measures the period of the pulse to measure the target object. Detect relative speed between 20 and. As an example of the measuring means, there is a method of using a clock having a frequency higher than the Doppler shift frequency and counting only while the pulse is at "H" level. This Doppler shift frequency corresponds to the relative velocity of the target object 20 as it enters the projection beam, and thus the relative velocity can be detected by measuring the period of the shaped pulse. The detected relative speed is sent to the delay circuit 16 as a relative speed detection signal S _VC .

The delay circuit 16 receives the relative speed detection signal S_VC
From the target object 20 penetration speed (ie
Timing signal (delay timing signal) according to relative speed
Issue S _DT) Is generated and sent to the quadrant determiner 17. Quadrant judgment
Device 17 is the trigger output from the trigger pulse generator 13.
・ Pulse latch signal S_LEnter as. This latch
Signal S_LIs the binary signal from each comparator of the signal comparator 14.
It is used to hold the signal output (see Figure 3). Quadrant
The regulator 17 holds the binary signal output from the signal comparator 14.
The existence quadrant of the target object 20 is determined based on. For example,
If the target object 20 exists in the fourth quadrant, comparators 2 and 3
Output of "0", and the output of comparators 1 and 4 is "1".
Therefore, this state is determined to be (present quadrant = fourth quadrant). elephant
The limit determiner 17 determines the result of this determination (existence quadrant determination signal S
_Q) Is the delay timing signal S from the delay circuit 16_DTRespond to
And outputs it to the detonation timing generator 18.

Table 1 shows the relationship between the existence quadrant of the target object 20 and each comparator output. Table 1 Signal comparator output [Target existing quadrant signal] 1st quadrant 2nd quadrant 3rd quadrant 4th quadrant Comparator 1 0 0 1 1 Comparator 2 1 1 1 0 0 Comparator 3 0 1 1 1 0 Comparator 4 1 0 The 0 1 detonation timing generator 18 is the trigger pulse generator 13
Based on the trigger pulse signal S _L from the quadrant, based on the existence quadrant determination signal S _Q from the quadrant determiner 17, the detonation time is controlled so that the projectile of the warhead hits the target object 20 with good timing. An ignition timing signal in the direction of the target object is sent to the warhead.

As described above, according to the proximity fuze device of the present embodiment, the information (relative velocity detection signal S _VC ) regarding the relative velocity with respect to the target object 20 is transmitted to an external device (another device mounted on the flying object). ), The relative velocity detector 15 provided in the device generates the detonation timing signal based on the relative velocity detector 15, and the intrusion quadrant detection signal of the target object 20 is transmitted. It is possible to accurately detect the existence direction of the warhead, and thus it is possible to accurately concentrate the bullet pieces of the warhead at the optimum timing with respect to the target object 20.

In addition, even if it is mounted on a projectile that cannot input speed information from an external device, or if the external device cannot send speed information due to an attack of the opponent or is in a failure state, the initiation timing signal is accurate. It can be sent to the warhead to improve the shot-down effect against the target.

[0023]

As described above, according to the present invention, the means for internally generating the information relating to the relative velocity with respect to the target object is provided, and the optimum initiation timing signal is transmitted based on the means. The presence direction of the target object can be accurately detected, and the bullet pieces of the warhead can be accurately focused on the target object at the optimum timing.

Further, the proximity fuze device of the present invention is mounted on a flying object in which speed information cannot be input from an external device, or the external device is in a state of being unable to send speed information due to an attack of the other party or in a failure state. Even in this case, the detonation timing signal can be accurately sent to the warhead, which greatly contributes to the improvement of the shot-down effect against the target.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a proximity fuze device as one embodiment of the present invention.

FIG. 2 is a circuit diagram showing a configuration example of a signal comparator in FIG.

3 is an output signal waveform diagram of the signal comparator of FIG.

FIG. 4 is a block diagram showing a configuration of a proximity fuze device as an example of a conventional type.

[Explanation of symbols]

11 ... Radio wave target detector 12a, 12b ... Signal detector 13 ... Trigger / pulse generator 14 ... Signal comparator 15 ... Relative speed detector 16 ... Delay circuit 17 ... Quadrant determiner 18 ... Detonation timing generator 20 ... Target object E1 to E4 ... target detection signals E _01, E ₀₂ ... decorrelated signal S _L ... trigger pulse (latch signal) S _VC ... relative speed detection signal S _DT ... delayed timing signal S _Q ... there quadrant decision signals

Claims (1)

[Claims] 1. A device mounted on a projectile equipped with a warhead, for instructing an ignition operation of an ammunition of the warhead when the projectile approaches a target object (20), the center of which is the axis of the projectile. The projection beam is projected in a cone shape toward the front direction of the flying object in each of at least four quadrants divided in the entire circumferential direction, and a reflected wave from the target object with respect to the projection beam is detected. Target detector that outputs detection signals (E1 to E4) according to signal strength in each quadrant
(11) and the detection signals output from the target detector are respectively compared, and a circuit (14, 17) for judging the existence quadrant of the target object based on the result of the comparison, and the output from the target detector A means (15) for detecting a relative velocity with the target object based on each detected signal, and a timing signal (S _DT ) by delaying the detected relative velocity signal (S _VC ) by a predetermined time. And a delay means (16) for outputting the signal, and instructing the ignition operation based on the delayed timing signal and the information (S _Q ) of the determined existence quadrant. apparatus.