JPH0718674B2 - Proximity fuze - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a radio wave / light wave composite type proximity fuze device.

The proximity fuze device according to the present invention is mounted on a flying object, and has means for rotating the detection quadrant of the electric wave and the light wave for detecting the target existence direction by 45 ° to detect the incoming target existence quadrant. It is possible to limit the existence direction of the target object in the quadrant by using two methods of radio waves and light waves.

Further, according to the device of the present invention, the target existence direction is detected by using the two methods of radio wave and light wave, and the detection resolution is improved, and the influences of jamming radio waves, jamming light, reflected waves, etc. are reduced, and malfunctions are reduced. It is possible to obtain the close fuze device.

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

Generally, an active proximity fuze of this type receives a reflected wave from a target object when the target object passes through a projection beam of radio waves or light waves, and detects an intruding target object.

Conventionally, in an active light wave proximity fuze, a fan beam is formed through an optical system lens, and the fan beam configures a four-quadrant or four or more quadrants as a detection range of the entire circumference and When the reflected light of the same wavelength is input to the light receiver and detected with a predetermined intensity or more, the detection signal is sent to the warhead as an ignition signal.

In this case, the target detection quadrant range is determined by the characteristics of the projector that forms the fan beam, and there is the inconvenience that an unclear region of the detection range occurs near the boundary between the detection quadrant and the adjacent detection quadrant.

Due to the characteristics of the projector for projecting in the all-circumferential direction by the above fan beam configuration, a notch occurs near the boundary of the quadrant range, so that the notch portion has a disadvantage that the effective detection distance becomes small.

In the active radio wave proximity fuze, the transmission / reception antenna pattern is detected by the transmission / reception combined pattern because the formation of the projection fan beam is affected by the relationship between the wavelength of the transmission radio wave and the shape (eg diameter) of the mounted flying object. The beam has a large unclear portion in the adjacent quadrant detection range. Further, when used in a millimeter wave band having a short wavelength, the wavelength becomes extremely short with respect to the diameter of the flying object, resulting in a fan beam with a large notch, which makes it difficult to obtain a uniform effective detection distance around the entire circumference. is there.

Further, since the above-mentioned radio wave or light wave type proximity fuze is used separately, each of the jamming radio wave, jamming light,
There is an inconvenience that it is easily affected by unnecessary electric waves and light waves such as sunlight and reflected light.

The object of the present invention is to rotate the detection quadrant of the radio wave and the light wave for detecting the presence direction of the invading target by 45 °, detect the invading target, and determine the target existence quadrant. An object of the present invention is to provide a radio wave / light wave composite type proximity fuze device in which the detection direction is improved by limiting the direction of existence of a target object in a quadrant.

Another object of the present invention is to provide a radio / light wave composite type proximity fuze device capable of reducing the effects of radio wave / interference light, sunlight, reflected light, etc. by using two methods of radio wave / light wave. Especially.

[Means for Solving the Problems]

According to the present invention, a radio wave target detection unit that receives reflected waves from a target object of a fan beam by the first to fourth radio waves corresponding to four quadrants, a fan by the first to fourth radio waves,
In the arrangement in which the beam projection arrangement is rotated by 45 ° in a predetermined rotation direction, the lightwave target detection unit that projects the lightwave beam and receives the reflected lightwave beam from the target object, and the output signals of the radiowave target detection unit are adjacent to each other. Output of the radio wave signal comparison unit that compares the output signal of the matched quadrant, the output signal of the light wave target detection unit with the output signal of the adjacent quadrant, and the output of the radio wave signal comparison unit A signal and a latch signal from the radio wave target detection unit are used to determine a target existence quadrant by radio waves. A radio wave existence quadrant determination unit, an output signal from the light wave signal comparison unit and a latch signal from the light wave target detection unit are received, and a light wave is received. Receiving the output signal of the light wave existence quadrant judgment unit and the light wave existence quadrant judgment unit, which determines the target existence quadrant by
There is provided a radio wave / light wave composite type near fuze device characterized by comprising a quadrant signal emitting section for judging the existence direction of a target object by synthesizing the output signals.

〔Example〕

A proximity fuze device as an embodiment of the present invention is shown in FIG.

Fig. 1 shows the mounting conditions of the radio wave transmitting / receiving antenna, the light wave projector, and the light receiver in the flying object in the device.
It is shown in FIG.

FIG. 1 is a device having target detection units (1 and 2) for radio waves and light waves of an active system, and for detecting a target existence direction within four quadrants in the omnidirectional direction around the axis of a flying object.

The radio wave target detection unit 1 includes a pair of transmission / reception antennas 11 to 14,
The radio wave target detector 10 is included. Transmit and receive antennas (11-14)
For example, the transmission waves are projected by the upper and lower transmission antennas (11, 12), the reflected waves from the target object are received by the left and right reception antennas (13, 14), and the radio wave target detector (10) is received. Is transmitted to the radio wave signal comparison unit (3) as a four-quadrant fan beam signal via. (Japanese Patent Application No. 63-15 by the applicant
In this case, any method can be used as long as it is an antenna capable of forming a 4-quadrant fan beam.

Similarly, the light wave target detectors 2 each have a pair of projectors (211 to 211).
4) and sends a lightwave signal with respect to the target through a light receiver (221 to 224), sends a signal to the detector 201 to 204 via the optical receiver receives the reflected light, the output S _L ( 1) ~S _L
In (4), the information of each quadrant I to IV is transmitted to the lightwave signal comparison unit 4. In this case, the light wave target detection unit 2 may use any of the target detectors 201 to 204 capable of detecting four quadrants using infrared rays or a semiconductor laser oscillation light source.

As shown in FIG. 2, radio wave antennas 11 to 14, a projector (211 to 214), and a light receiver (221 to 224) are mounted on a flying body equipped with a proximity fuze. The device of FIG. 2 is shown in perspective in FIG. The arrangement of the radio wave type antenna and the arrangement of the light wave type projector / light receiver in the apparatus of FIG. 2 are shown in FIGS. 4 (A) and 4 (B).

In the radio wave system, a target detection beam shown in FIG. 5 (A) is generated by combining the beams of the transmitting antenna and the receiving antenna. In the light wave system, the target detection beam shown in FIG. 5 (B) is obtained according to the positions of the projector and the light receiver. In this way, the four beams of the lightwave system are
It is rotated 45 ° with respect to each beam.

As shown in FIG. 5, a target object coming in is detected by the two methods in a state where the light wave type detection quadrant is rotated by 45 ° in a predetermined rotation direction with respect to the radio wave type detection quadrant.
The predetermined rotation direction can be either clockwise or counterclockwise, but in the following, a case where counterclockwise is selected will be described.

The reflected wave of the target object that has entered the projection beam of the two-type target detector is compared as the detection signal with the threshold level setting value in each target detector, and the detection beam signal (radio waves: S _EM (1) to S _EM (4), the light _wave: S L (1) ~S
_{When L} (4)) is sent as a voltage value to each of the signal comparison units, the detection signal of the moment when the target is detected is sent as a trigger pulse to the existing quadrant determination unit.

The radio signal comparison unit 3 detects the detection beam signal S of each quadrant.
_{Using EM} (1), S _EM (2), S _EM (3) and S _EM (4), a pair of adjacent quadrants are paired by a normally used comparator circuit as shown in FIG. For example, in the case of quadrants I and II, the signals of S _EM (1) and S _EM (2) are compared, the detected quadrant range is clarified, and the quadrant signals (S _a (1) to S S _a (4)) is sent to the radio wave existence quadrant determination unit 5.

Similarly to the above, the light wave signal comparison unit also uses the detection beam signals S _L (1), S _L (2), S _L (3), and S _L (4) of each quadrant, and uses the detection beam signals S _L (1), S _L (2), S _L (3), and S _L (4), The signals in which the matched quadrants are paired are compared to clarify the detection quadrant range, and the quadrant signals (S _b (1) to S
_b (4)) is sent to the light wave existing quadrant determination unit.

The radio wave and light wave existence quadrant determination units 5 and 6 use the binary signal input from the respective signal comparison units 3 and 4 as a trigger pulse from the target detection unit 1 as a latch signal and are shown in the first example in FIG. The signal is held as described above, and the signal is sent to the quadrant signal generator 7 as a target existing quadrant signal according to the signal holding state.

In the light wave method, since the quadrant detection range is rotated by 45 ° and shifted, the detection signals of different quadrants in the + 45 ° direction and −45 ° direction with respect to the center of each quadrant of the radio wave method are the first. It is output as shown in FIG. 7 second and third.

The quadrant signal generation unit 7 synthesizes the binary signals held in the existence quadrant judgment units 5 and 6 of the radio wave system and the light wave system, as shown in FIG. 8, and judges the direction in the existence quadrant of the target object. To do.

For example, when a target enters in the quadrant I in the direction shown by the arrow in FIG. 5, a binary signal of “0” is output to the radio wave type comparator circuits II and III, and a binary signal of “1” is output to the comparator circuits I and IV.
In the lightwave type comparator circuit, since the target exists on the + 45 ° side of the quadrant I, the detection output of the projection beam 1 causes the comparator circuits II and III to be “0”, and the comparator circuits I and IV to be “1”. It becomes a binary signal of ".

When the output signals of the two systems are combined, in this state, as shown in FIG. 8, it is determined that the target exists within the + 45 ° direction of the existence quadrant I, and the information is sent to the warhead.

In the apparatus shown in FIG. 1, the quadrant detection range of the target detector for radio waves and light waves is rotated by 45 °, and the target object coming in
By combining and detecting by the method, the direction of the target in the quadrant can be detected, and the detection resolution by the two methods can be improved.

Fig. 1 Signal comparison units 3 and 4 in the device, trigger pulse,
Regarding the existing quadrant determining units 5 and 6, and the quadrant signal generator 7, the specification of Japanese Patent Application Nos. 63-154967 and 63-176484 by the applicant of the present application can be referred to.

〔The invention's effect〕

According to the present invention, the intruding target is detected by rotating the radio wave and light wave detection quadrants for detecting the target existence direction by 45 °, the target existence quadrant is determined, and the existence of the target object in the quadrant is detected. The direction can be limited, and the function improvement of the radio wave combined wave type fuze device is realized.

Further, according to the present invention, the target existing direction is detected using two methods of radio waves and light waves, and the detection resolution can be improved.

Further, according to the present invention, two methods of radio wave and light wave are used,
It is possible to reduce the influence of jamming radio waves, jamming lights, reflected waves, and the like.

[Brief description of drawings]

FIG. 1 is a schematic block diagram of a proximity fuze device as an embodiment of the present invention, and FIG. 2 is a diagram for explaining a radio wave type antenna, a light wave type projector, and a light receiver mounted on a flying object. FIG. 4 is a rear perspective view of FIG. 2, and FIGS. 4 (A) and 4 (B) are cross-sectional views of the arrangement of the radio wave type antenna and the light wave type projector and the light receiver in the apparatus of FIG. 2, respectively. FIGS. 6A and 6B are diagrams showing a pattern in each quadrant of the projection fan beam in the radio wave system (A) and the light wave system (B), respectively. FIG. 6 is a quadrant in the radio wave signal comparison unit 3 of FIG. 7 is a connection diagram of a comparator circuit including a comparator, FIG. 7 is a waveform diagram of a latch signal of a radio wave method and a light wave method when rotated by ± 45 °, and a target existence quadrant determination signal waveform diagram. FIG. Shows the binary target existence quadrant signal in , Respectively represent. 1 ... Radio wave target detection unit, 2 ... Light wave target detection unit, 3 ... Radio wave signal comparison unit, 4 ... Light wave signal comparison unit, 5 ... Radio wave existence quadrant determination unit, 6 ... Light wave existence quadrant determination unit, 7 ... Quadrant signal generator, 10 ... Radio wave target detector, 11-14 ... Transmitting / receiving antenna, 201-204 ... Lightwave target detector, 211-214 ... Projector, 221-224 ... Photoreceiver.

Claims (1)

[Claims] 1. A radio wave target detecting unit for receiving a reflected wave of a fan beam of first to fourth radio waves from a target object corresponding to four quadrants, and a fan beam of the first to fourth radio waves. In the arrangement in which the projection arrangement of is rotated by 45 ° in the predetermined rotation direction, the light wave target detection unit that projects the light wave beam and receives the reflected light wave beam from the target object, and the output signals of the above-mentioned radio wave target detection units are adjacent to each other. Radio wave signal comparison unit for comparing with the output signal of the quadrant, the light wave signal comparison unit for comparing the output signal of the light wave target detection unit with the output signal of the adjacent quadrant, the output signal of the radio wave signal comparison unit And a radio wave existence quadrant determining unit that receives a latch signal from the radio wave target detecting unit and determines a target existence quadrant by a radio wave, an output signal of the light wave signal comparing unit and a latch signal from the light wave target detecting unit Receiving the output signal of the light wave existence quadrant judging unit and the light wave existence quadrant judging unit and judging the target existence quadrant by the light wave, and by synthesizing the output signals A radio wave / light wave composite type close fuze device, comprising: a quadrant signal generator that determines the direction of existence.