JPH05118800A - Proximity fuse - Google Patents

Abstract

PURPOSE:To obtain an optimum timing for detecting a target by varying a beam of an antenna in response to a relative speed between a missile and the target. CONSTITUTION:Information of a relative speed between a missile and a target is applied as a relative speed signal 11 from a seeker 1 to a beam controller 2. In this case, a beam control signal 12 is applied from the controller 2 to an antenna 4. When the antenna 4 receives the signal 12, a center of a direction of the transmitted beam is so varied as to be inclined toward a nose at a gradient responsive to the relative speed thereby to set the timing for detecting the target to an optimum value. When presence of the target is detected by a detector 5 within the inclined transmitted beam, an ignition signal 16 is output from an igniting circuit 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a proximity fuze, and more particularly to a proximity fuze which is provided on a projectile and detonates a warhead of the projectile in a state of being close to a target.

[0002]

2. Description of the Related Art Conventionally, a close fuze of this type has a center axis in a direction perpendicular to the aircraft axis of a projectile, is omnidirectional in the horizontal direction (a plane vertical to the aircraft axis), and is omnidirectional in a vertical direction (a horizontal plane to the pivot axis). While propagating a transmission beam given a predetermined directivity angle, it travels along with a flying object, and a target is captured by the transmission beam to fire a warhead whose reflected signal reaches a predetermined level.

In the conventional proximity fuze, the transmission beam is fixed, and the timing for detecting the target is always constant even if the relative speed between the flying object and the target is different.

[0004]

In this conventional proximity fuze, since the transmission beam is fixed, the relative velocity between the flying object and the target becomes large, and the timing of target detection is advanced accordingly. Even when it is necessary to suppress the delay of the warhead detonation timing by changing the direction of the transmission beam, there is a problem that the timing of target detection cannot be advanced.

The object of the present invention is to solve the above-mentioned problems,
An object of the present invention is to provide a proximity fuze that can prevent the delay in the timing of target detection by inclining the directivity direction of the transmission beam toward the head of the projectile in accordance with the relative velocity between the projectile and the target.

[0006]

The proximity fuze of the present invention is a proximity fuze that is placed on a projectile to detonate a warhead of the projectile in the vicinity of a target during flight, and It comprises a means for suppressing the timing delay of the warhead detonation by inclining the pointing direction of the transmission beam for capturing the target to the head direction of the flying body in response to the increase in velocity.

Further, the proximity fuze of the present invention has a structure in which the relative velocity is detected by a seeker of a flying object.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.

In the embodiment shown in FIG. 1, a seeker 1 capable of detecting a relative velocity between a flying object and a target, a beam control circuit 2 for controlling a tilt of a directivity center of a transmission beam,
An oscillation circuit 3 for generating a transmission signal, an antenna 4 for forming a transmission beam pattern to transmit a transmission signal and receive a reflection signal, and a detection circuit 5 for detecting the presence of a target from the reception signal captured by the antenna 4. An ignition circuit 6 for generating an ignition signal for initiating a warhead based on the output of the detection circuit 5.

Next, the operation of this embodiment will be described.

The oscillation signal 13 oscillated by the oscillation circuit 3 is sent to the antenna 4. At the same time, a relative velocity signal 1 that conveys information on the relative velocity between the flying object and the target detected by the seeker 1.
1 is transmitted to the beam control circuit 2.

The relative velocity signal 11 transmits a beam control signal 12 for controlling the directional center of the transmission beam formed by the antenna 4 to be transmitted with an inclination corresponding to the magnitude of the relative velocity.

By the transmitted beam control signal 12,
The inclination of the transmission beam of the antenna 4 changes according to the relative speed, and the oscillation signal 13 is transmitted from the antenna 4 as the transmission signal 17 in the beam direction. At that time, if the target is present in the beam, the transmitted signal 17 hits the target and the reflected signal 1
It is reflected as 8.

The reflected signal 18 is received by the antenna 4, converted into an electric signal and amplified, and the received signal 14 is supplied to the detection circuit 5.

When the detection circuit 5 detects the presence of a target in the input reception signal 14, the detection circuit 5 collects the detection signal 15 and supplies it to the ignition circuit 6.

The ignition circuit 6 thereby generates the ignition signal 16 to detonate the warhead, and thus can detonate the warhead without losing timing even when the relative speed increases.

The above-mentioned increase in the relative velocity reaches the maximum when the target and the flying object are traveling in opposition to each other, and the target is captured without losing the timing when the directivity center of the transmission beam is fixed. Becomes extremely difficult.
Therefore, by tilting the directional center of the transmission beam in the direction of the head of the flying object in accordance with the magnitude of the relative velocity, the timing of target acquisition can be ensured as well as the timing of optimum hit with respect to the target.

[0019]

As described above, according to the present invention, the directional center of the transmission beam of the antenna is variable so as to be tilted toward the head in accordance with the relative speed between the flying object and the target.
This has the effect of being able to detect the target and detonate the warhead at the timing that provides the optimum hit timing for the target.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.

[Explanation of symbols]

 1 Seeker 2 Beam Control Circuit 3 Oscillation Circuit 4 Antenna 5 Detection Circuit 6 Ignition Circuit 11 Relative Speed Signal 12 Beam Control Signal 13 Oscillation Signal 14 Received Signal 15 Detection Signal 16 Ignition Signal 17 Transmission Signal 18 Reflection Signal

Claims (2)

[Claims] 1. A proximity fuse for deploying on a flying object to detonate a warhead of the flying object in proximity to a target in flight, which is for capturing a target in response to an increase in relative velocity between the flying object and the target. A proximity fuze, comprising means for tilting the directivity direction of a transmission beam toward the head of a projectile to prevent a timing delay of warhead detonation. 2. The proximity fuze according to claim 1, wherein the relative velocity is detected by a seeker of a flying object.