JPH0718678B2 - Proximity fuze - Google Patents

Description

The present invention relates to a proximity fuze device for mounting a flying object.

The proximity fuze device according to the present invention is mounted on a projectile, adjusts the detonation signal so as to cope with a wide range of relative velocities, and cause the projectile of the warhead to strike the hit point of the target object at the optimum timing. This is to increase the target defeat effect of the proximity fuze device.

Further, according to the present invention, the proximity fuze device uses the distance signal from the target guiding unit to start the operation when the target object is approaching, so that the initiation timing signal does not occur early due to a malfunction. Is provided.

[Prior Art and Problems to be Solved by the Invention]

Generally, this type of active proximity fuse receives a reflected wave from a target object and detects an intruding target object when the target object passes through a projection beam of radio waves or light waves. The reflected wave from the target object is activated immediately after it is detected by the reception beam or after a predetermined fixed delay time, so it does not always operate at the optimum position depending on the relative relationship with the target object. There wasn't. In a radio or light wave type proximity fuze that sets the detonation timing using the relative velocity signal from the target object from another device of the flying object, the detonation timing relative to the relative velocity can be set. It was not possible to set the detonation timing for the distance (miss distance) to the point where the warhead hits the bullet. The delay of the warhead's detonation until it explodes due to the detonation signal, and the time required for the miss distance until the projectiles of the warhead scatter and reach the target object When the target object passes, before the bullet piece of the warhead reaches the target object, or when the target object is very close to the projectile, the bullet piece passes through, or the range of scattering of the bullet piece of the target object is It can be said that the warhead has not reached, and the warhead can destroy the target object and cause no damage.

In conventional devices, in particular, in recent years, the anti-attack target of the flying object copes with a wide range of relative speeds from a high-speed flying object (for example, SSM) to a low-speed target such as a cruise flying object or a rotary wing aircraft,
There is a problem in that it is not possible to send out an optimum detonation timing signal for destroying, and it is not possible to meet a strong demand for the destroying ability of the flying object.

In the conventional device, the proximity fuze is turned on and started by the safety device when the specified acceleration and distance are reached.Therefore, due to reflected waves from the ground surface, interfering waves, etc. However, there is a problem in that a malfunction occurs and an initiation signal is generated early.

An object of the present invention is to cope with a wide range of relative velocities, adjust a detonation signal so as to strike a projectile of a warhead at a hit point of a target object at an optimum timing, and send it to the warhead, thereby defeating a target of a close fuze. Is to increase.

Another object of the present invention is to prevent the detonation timing signal from being generated early due to a malfunction by starting the operation near the approach of the target object by the distance signal from the target guiding unit.

[Means for Solving the Problems]

In the present invention, the projectile and the distance signal representing the distance of the target object S (R), flying object and the target guiding part generates a relative velocity signal S (V _C) representing the relative velocity of the target object; projectile A target detection unit that generates a target detection signal S _d by using a projection beam projected at a predetermined angle in the front direction of the target signal; a distance signal S (R) from the target guiding unit and a target detection signal from the target detection unit A meeting time derivation unit that uses S _d to calculate a time difference τ between the time when the target object reaches a preset point a ₁ and the time when the target object hits the point a _{2 at} which the target beam collides with the projection beam. By using the signal of the time difference (τ) from the deriving unit and the relative velocity signal from the target guiding unit, the miss distance (M _D ) between the target object and the flying object when the target object passes in the vicinity of the flying object Miss distance calculation A target length calculation unit that generates a target center signal S _C using the shape signal S (V _T ) from the meeting time derivation unit and the relative velocity signal S (V _C ) from the target guidance unit; The distance signal S (MD) from the distance calculation unit, the target center signal S _C from the target length calculation unit, and the distance signal S (R) and the relative velocity signal S (V _C ) from the target guidance unit are used. And a detonation timing determination unit that determines the detonation timing of the warhead;

[Work]

In the device according to the present invention, an active radio system capable of detecting a target object coming in by projecting a beam in a cone shape in the forward direction in the entire circumferential direction around the axis of the flying object, or The target detection unit of the lightwave method is used, the distance from the target guidance unit of the flying object that captures and tracks the target object, and the signal of the relative velocity are used, and the projection beam of the radio wave or the light wave is set to a predetermined angle, and By detecting the meeting time between the beam angle tilted in the direction and the intruding target, the distance signal and relative velocity signal of the target guiding unit are used to estimate the miss distance at which the target object passes near the projectile, and the target beam passes. With the detection signal of time and the relative speed of the target guiding unit, the center of the target object is estimated,
The detonation signal is set so that the projectile of the warhead hits the center of the target object, and it is sent at a timely timing.The operation start time of the detonation timing generation part is controlled by the distance from the target guidance part and the relative velocity signal. Thus, the generation of an early detonation signal due to a malfunction is prevented. This device is fast and small, and is used for a projectile for frontal attack of a target.

〔Example〕

As shown in FIG. 1, the target guiding portion of the projectile and the target detector according to the active method, for example, a distance signal to the target from the homing device, S (R) and relative speed signal S (V _C)
This is a proximity fuze device that accurately hits a bullet piece at the optimum timing with respect to the intruding target object.

The target detection unit used here is a light wave system and a radio wave system,
For example, any device capable of detecting the presence of an intrusion target in four quadrants or more quadrants or all around the axis of the flying object by using a microwave or millimeter wave radio system is used. Good. Regarding this, for example, Japanese Patent Application No. 63-176484 and Japanese Patent Application No. 63-20 by the applicant of the present application.
You can refer to 9365 etc.

The projection beam of the target detection unit is set at a predetermined angle (θ) in the forward direction of the flying object as shown in FIG. 2 to detect the intruding target object. The projection beam has a beam width,
It is represented by a straight line here.

Using the target distance signal S (R) from the target guiding unit, the meeting time detector detects the time required to reach a preset distance a ₁ between the flying vehicle and the target object.

Association time detector detects the distance a ₁ point previously set by using a detection signal of a ₂ points associated to the projection beam, the time difference τ passing through a _2-point from a _1-point of the target object, Miss Send to distance calculator.

Miss distance calculator by the relative velocity V _C from the target guiding section passing time difference of _one point and a _2-point a (tau), the distance that passes near the projectile of a target object (miss distance, M _D) of Calculated by the relational expression (1) and sent to the initiation timing generator.

M _D = (R _O −V _C · τ) tan θ (1) Here, R _O is a constant distance set in the target guiding unit of the flying object and is a value corresponding to a ₁ point, and V _C is the target The relative velocity between the object and the flying object, which is detected by the target guidance unit of the flying object, τ is the time from when the target passes point a ₁ to when it passes point a ₂ , and the target detection Section and the output signal from the target guidance section.

Further, the meeting time deriving unit detects the time from the detection start to the completion of the detection of the target object using the target detection signal S _d of the projection beam, and the shape signal S (V _T ) is sent to the target length calculator.

The target length calculation unit calculates the time T _L from the start of detection to the completion thereof.
And the relative velocity signal V _C from the target guiding unit, the center signal S _C of the target object is sent to the detonation timing generator.

The detonation timing generator uses the miss distance signal S (M
_D ), the target center signal S _C, and the relative velocity signal S (VC) from the target guiding unit cause the projectile of the warhead to move to the center T of the target object.
_An optimal detonation signal is sent to the warhead so as to strike _C or a hit point.

The detonation timing generator is a distance signal S from the target guidance unit.
(R) controls the operation start time of the detonation timing generator.

R ≦ R _O or R / V _C = T _O where the time until the projectile of the warhead hits the target object T _F
Is T due to miss distance M _D and fragment flying velocity V _{W
It is} calculated from _F = M _D / V _W (msec). The time T _D from the detection point a _{2 of the} projection beam to the projectile scattering center point a ₃ of the warhead is the projection beam angle θ, the deviation D _W between the center of the projector and the warhead, the miss distance M _D, and the relative distance. According to the velocity V _C , T _D = [(cot θ × M _D ) + D _W ] / V _C (msec)
, The target object passes the point a ₃ and the center point C
The time _{T C} of to come in, (See FIGS. 3 and 4).

Therefore, in order for the bullet piece to strike the center point or the hit point of the target object in a timely manner, the time (T
_{From F} , T _D , T _C ) to T _F − (T _D + T _C ) = ΔT, the detonation signal is adjusted by adjusting the time including the detonation delay of the target detection unit, the calculation unit and the warhead for the time of ΔT. Send to the warhead. (See FIG. 4).

As a result, bullet pieces of the warhead concentrate and strike at the center or the hit point of the target object, the power of the warhead can be utilized to the maximum, and the target shooting ability can be improved. The hit point mentioned here is a point that is away from the center of the target object in the deadly part of the target object.

A method for detecting the arrival at point a ₁ shown in FIGS. 2 and 5 in the apparatus of FIG. ₁ is illustrated in FIG.

The target guiding unit in the present invention is a device for bringing a flying object close to a target object and hitting it, and there are various types.
A homing device will be described as an example of the present invention.

The target guiding unit projects a projection beam of a radio wave or a light wave onto a target object for automatic insertion, detects the direction of the target object from the received wave, and calculates the relative distance R and the relative velocity V _C with the target object, It is a means to make a flying object approach and hit a target object.

Detection of reaching a ₁ point a certain distance R _O away from the beam projector of the flying object is shown in FIG. The signal corresponding to the constant distance R _O and the target distance signal from the target guiding section 2 of the flying object are sent to the coincidence detection circuit 11, and the coincidence pulse signal is issued only when the timings are compared and coincidence is made.

Next, the method for detecting the flight time τ in the apparatus shown in FIG.
Illustrated in the figure. As shown in FIG. 5, the time τ from the moment the target object passes the point a _{1 to the} point a ₂ is calculated in the meeting time derivation unit as shown in FIG. That is, the pulse from the pulse generator 12 enters the AND gate 14, and the a ₁ point pulse and the a ₂ point pulse are input to the flip-flop 13 at the set / reset timing, and the output thereof enters the AND gate 14, Only pulses having a duration of only the time τ are counted by the counter 15.

and sets the flip-flop 13 in a ₁ arrival detection signal, resetting in a _2-point arrival detection signal, the pulse width of the time interval τ can be obtained. If the counter 15 counts the number of pulses passing during this period, τ can be obtained.

Further, the preventive measures against the initiation malfunction in the apparatus of FIG. 1 are illustrated in FIG. The detonation signal output from the detonation timing determination unit 6 is input to the detonation timing generator 16. On the other hand, the distance R of the target object measured by the target guiding unit 2 of the flying object is a ₁
After getting closer than the certain distance R _O set for the point,
That power-on and becomes the power supply control from the time of the R ≦ R _O (ON) signal is similarly input to the detonation timing generator 16 to actuate the initiator timing generator 16.

〔The invention's effect〕

According to the present invention, the detonation signal is adjusted and sent to the warhead so as to strike a range of relative velocities and strike the projectile of the warhead at the hit point of the target object at the optimum timing, thereby achieving the target defeat effect of the close fuze. Can be increased.

Further, according to the present invention, by the distance signal from the target guiding unit, to start the operation near the approach of the target object,
The initiation timing signal is prevented from being generated early due to a malfunction.

[Brief description of drawings]

FIG. 1 is a diagram showing a schematic configuration of a proximity fuze device as an embodiment of the present invention, and FIGS. 2, 3, and 4 are all explanatory diagrams for explaining the operation of the device of FIG. FIG. 5 is a waveform diagram showing a signal waveform in the meeting time derivation unit in the apparatus of FIG. 1, FIG. 6 is an explanatory view for explaining the method for detecting a ₁ point arrival in the apparatus of FIG. 1, and FIG. 7 is the apparatus of FIG. 8 is an explanatory view for explaining the method of detecting the flight time τ in FIG. 8, and FIG. 8 is an explanatory view for explaining the method for preventing the occurrence of malfunction of the initiation in the device of FIG. 1 ... Target detection unit, 2 ... Target guidance unit, 3 ... Meeting time derivation unit, 4 ... Miss distance calculation unit, 5 ... Target length calculation unit, 6 ... Detonation timing determination unit, 10 ... Target Object, 11 ... coincidence detection circuit, 12 ... pulse generator, 13 ... flip-flop, 14 ... AND gate, 15 ... counter, 16 ... detonation timing generator.

Claims (1)

[Claims] 1. A projectile and the distance signal S representing the distance between the target object (R), flying object and the target guiding part generates a relative velocity signal S (V _C) representing the relative velocity of the target object; projectile A target detection unit that generates a target detection signal S _d by using a projection beam projected at a predetermined angle in the front direction of the target signal; a distance signal S (R) from the target guiding unit and a target detection signal from the target detection unit A meeting time derivation unit that uses S _d to calculate a time difference (τ) between the time at which the target object reaches a preset point a ₁ and the time at which the target object hits point a _{2 at} which the target beam collides with the projection beam. a signal time difference between the meeting time deriving unit (tau), miss distance (M _D between the target object, the flying object when using the relative velocity signal from the target induction unit, the target object passes by the projectile ). Miss distance calculator ; Target length calculation unit generates a target center signal (S _C) using the relative velocity signal S (V _C) from the shape signal S (V _T) and the target guiding portion from the associated time derivation unit; and wherein The miss distance signal S (MD) from the miss distance calculation unit, the center signal S of the target object from the target length calculation unit
_C, and using the distance signal S (R) and the relative velocity signal S (V _C) from the target guiding portion, detonation timing determination unit for determining a warhead detonation timing; for projectile mounted, characterized by comprising Proximity fuze device.