JPS5827077A - Proximity fuse - Google Patents

Abstract

PURPOSE:To enable accurate action of a proximity fuse by continuously varying the threshold of a detector contrasting to an AGC output voltage of a radar in a guided flying object. CONSTITUTION:When a guided flying object is launched, a transmitter 7 emits radio waves to a target airplane 2 from a radar antenna 9 through a duplex DX8 at an appropriate timing and the reflected waves enter a receiver 10 via the antenna 9. Then, corresponding to the output voltage of an AGC11, the threshold of a detector 19 of a proximity fuse varies continuously. Subsequently, a transmitter 14 emits radio waves through the DX1 and an antenna 12 and when the target airplane comes into the radio waves, the reflected waves pass through a DX16 and mixed 17 with a part of transmitted signals to form Doppler signals. Those signals exceeding the threshold of the detector 19 trigger a detonation circuit 20, causing a warhead 23 to explode.

Description

[Detailed description of the invention] This invention relates to a butterfly-guided proximity fuse for the body.

In detail, there is a radar device that tracks the aircraft directly to the aircraft itself, and this device outputs a signal that detonates the bullet M in response to the magnitude of the reflected signal from the target aircraft that it receives. This paper proposes a proximity tube that changes the threshold value.

Recently, the targets of guided flying vehicles are fighter jets,
There are a wide variety of missiles, including Explosive S aircraft, 9 ground-to-ground missiles, and surface-to-surface missiles, and their sizes in terms of waves, that is, their effective reflection areas, also differ greatly. The level of the signal reflected from a target with a large effective reflection area and received is high, but the level of the signal reflected and received from a target with a small effective reflection area is small. For this reason, Klri precisely determines when the proximity fuse will generate the detonation signal.

It is necessary to change the threshold M that determines the signal level at which the detonation signal is output in accordance with the magnitude of the received signal from the target.

Proximity fuzes installed in conventional flight vehicles have a fixed threshold φ value that determines the signal level for outputting the detonation signal. Before the target crosses the beam of the proximity fuze, the butterfly operates and receives a signal. Even if you cross the beam,
To exceed the predetermined threshold I/hN.

The drawback was that it didn't work.

This invention was made to improve the above-mentioned conventional drawbacks, and will be described in detail below.

In Figure 1, (1) is a fermentation flywheel, (2) is an eye #! (3) is the radar system aL installed on the visiting aircraft IL+ and tracks the target aircraft 12), +41 is the beam of the antenna of the radar device 13), and (5) is the radar device (
3) and the target aircraft (2), +61 is the beam length of the antenna for the proximity signal, and the threshold for operating the proximity signal y;2>r is the target aircraft (2) received by the radar device 13). 2)
It changes depending on the magnitude of the reflected signal from the In other words, the target aircraft (
2) If the reflected signal from
Set Agl to high (-10,000, set L/cfll to set the threshold i value of the proximity fuze low when the received power is low.
It becomes possible to keep the time point at which the target aircraft (21) is detected constant without being affected by the received power from the second aircraft (12), that is, the size of the second aircraft (21).

Next, in FIG. 2, which shows a specific example of realizing the present invention, (7) is the first radar device (3) that is equipped on the flange guidance aircraft (1) and tracks the target aircraft (2). transmitter, 1
8) is a first duplexer that separates transmitting and receiving signals, -
91 is a receiver that performs frequency conversion and signal processing on the receiver section of the radar anti-900 that emits Wi-waves and receives reflected signals from the target aircraft (21).

011 is accepted! 021 is the antenna of the proximity fuse, and the side is the antenna of the proximity fuze. Power divider that equally distributes narrow power, 0aFi@2rv transmitter, (151! 2nd F), a
la, a combiner that takes out part of the power of u#, (to) a second duplexer that separates the transmitted and received signals, aη
is a mixer that mixes the received signal and a part of the transmission output from combiner a9 to produce the entire Doppler signal, αa is a predetermined band 1
The amplifier with lli is a detector that waits for a threshold value that can be changed externally, and the input tg signal is at this threshold value of 11.
N? Once you cross it, a signal will be emitted.

CO is the detonation circuit that generates the detonation signal in response to the output of the detector A9, 2N+ is the safety device to maintain the safety of the warhead, and the warhead explodes upon receiving the detonation signal.

like this! When a flying object is launched at the time of II formation, the transmitter (A) +71 u passes through the first duplexer (8) at the appropriate time and is sent from the radar antenna (9) toward the target @ (2). Emit electricity. Target aircraft (2
The radio waves reflected by 1 are again sent to the radar antenna (
9). Then the first duplexer +81
The transmission and reception are separated at , and the reception goes into 4 calls.

The input signal is subjected to 9 frequency conversion and 6 signal processing. AGCQl operates so that the output of receiver u1 becomes one pair. Here, the output voltage of AGCQll is proportional to the magnitude of the reflected signal from the target aircraft (layer 2 1, etc.), and the threshold value of the detector +11 of the proximity fuze is this AB
It changes continuously in response to the output layer pressure of the QID.

Then, the second transmission i 141 of the proximity fuze is sent to coupler 1
*St is radiated from the antenna a3 through the second duplexer (1G, power divider IJ).When the target e121 enters the beam of the antenna [12+, the radiated signal is connected to the S-guiding body +11. subject to a Doppler frequency shift proportional to the relative speed of the target aircraft (21).

Received. The received signal passes through the second duplexer (161) and is mixed with a part of the signal of the transmission output taken out by the coupler a on the mixer side to form a dragler signal, which is then output to the amplifier aa. The amplified signal is sent to the threshold [1 standby detector + IIK input, threshold vh corresponding to the output voltage of AGCGII of the radar device (3)].
It is compared with fIl and outputs a signal if this threshold i value is exceeded. Based on this output signal, the detonator circuit ■ generates a detonation signal.

It is sent to the 9th warhead via the safety equipment rIL1211 and the 9th warhead is fired.

As explained above, according to the present invention, the detector (a) is continuously changed in accordance with the pressure of the detector a (radar device + 3112) AGC (111 + 2) output (7). Only when aircraft (2) crosses can the proximity fuse be reliably activated. As a result, the power of *head■ can also be used effectively.

[Brief explanation of the drawing]

Fig. 1 is a state diagram showing the relationship between a fat guided flying object and a target aircraft, and Fig. 2 is a configuration diagram of a proximity fuze that realizes the principle of this invention. +1) is a guided flying object, +21F1 target (3) is the radar equipment, +41 is the antenna beam, (5) is the narrow line of sight connecting the radar equipment flH31 and the target aircraft (12), and (6) is the antenna beam of the proximity fuze. (7) is the transmitter (a) e of the radar device 13) +81 is the duplexer (a), +91#'i radar antenna, [1 (I is the receiver, on is AGc, α2 is the antenna, (13 is the power distribution (14+ is the transmitter!03
．． (ISti coupler, (1G+ is duplexer (
B). (171 is a mixer, ・a8 is an amplifier, (II is a detector that waits for the 9th column that can be externally variable, ■ is a detonator circuit. ah is a safety device, and 1 is a warhead. Note that the same or equivalent parts in Figure 1) are indicated with the same reference numerals. Agent Shin Kuzuno -

Claims (1)

[Claims] Equipped with the ``Visual Flying Body'' and emitting 41 from the ``Visiting Flying Body'' itself or other radio wave emitters,! In the proximity fuse, which activates the fuze by receiving reflected waves from the target aircraft, a radar device that tracks the aircraft is attached to the flying object itself, and depending on the signal level received by this radar device, A proximity fuse characterized by being configured to change the signal level that generates the detonation signal.