JP2669729B2 - Proximity fuse control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuze control device, and more particularly to a fuze control device which is mounted on a projectile equipped with a warhead and instructs the firing operation of the ammunition of the warhead when the projectile approaches a target object. Related to the device.

[0002]

2. Description of the Related Art A conventional fuze control device for a flying object projects a beam of radio waves or light waves from the flying object toward a target object, receives a reflected wave from the target object, and receives a reflected wave from the target object. An object is detected, and a signal based on the detection is used to activate the munition of the warhead immediately or after a predetermined delay time. for that reason,
Depending on the relative positional relationship between the flying object and the target object, the operation may not always be performed in an optimal state (optimally, an ignition timing at which a bullet of a warhead hits the target object).

[0003] Further, in a proximity fuze control device which sets the detonation timing using a relative speed signal (with respect to a target object) output from another device mounted on the flying object,
Although it is possible to set the detonation timing for the relative speed, it is extremely difficult to set the detonation timing for the distance (mis-distance) between the point at which the target object and the bullet of the warhead collide. is there.

[0004] Therefore, an explosion delay time of a warhead before exploding by an explosion signal or a time corresponding to a miss distance until a bullet of the warhead scatters and reaches a target is required. Therefore, when the target object passes a place relatively distant from the flying object, the target object passes before the bullet of the warhead reaches the target object, and conversely, the target object If it is located very close to the target object, the bullet piece may pass in front of the target object. In other words, a situation occurs in which the target object goes out of the range of the warhead's bullet fragments, so the warhead destroys the target object,
There is a drawback in that damage and the like cannot be effectively given.

[0005]

Since the conventional proximity fuze control device is constructed as described above, it impairs the ability of the flying object to destroy the target, and in particular, the flying object A flying object with a high attack target (eg SS
There is a problem that it is not possible to transmit an optimal detonation timing signal for defeating each of the relative velocities that range from M) to a low-speed target such as a cruise flying object or a rotary wing aircraft.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems in the prior art, and accurately detects the direction in which a target object is present, and consequently accurately concentrates the warhead fragments on the target object at an optimal timing. It is an object of the present invention to provide a proximity fuze control device capable of performing the above.

[0007]

A proximity fuze control device according to the present invention is mounted on a projectile equipped with a warhead, and when the projectile approaches a target object, it issues an ignition operation of an ammunition of the warhead. A control for capturing and tracking the target object, a target direction indicating signal indicating the direction in which the target object exists, a relative speed signal indicating the relative speed between the target object, and the flying Means for outputting an own-body speed signal for instructing the speed of the body, and a predetermined direction toward the front of the flying body in each of at least four quadrants divided in all directions around the axis of the flying body. A target detector that projects a projection beam in a cone shape at a set angle, detects a reflected wave from the target object with respect to the projection beam, and outputs a detection signal corresponding to a signal intensity for each quadrant; Output from the container Each detected signal is compared with the adjacent quadrant signal level, and a circuit for determining the existence quadrant of the target object based on the result of the comparison, and the circuit in each quadrant based on each detected signal from the target detector An angle calculating means for calculating a penetration angle of the target object and calculating and outputting a penetration angle of the target object in all directions using the calculation result and a predetermined reference value; and the target direction indicating signal and the relative speed signal. And generating target information on an associated angle of engagement with the target object and a target detection distance based on the own-vehicle speed signal, and a miss distance between the target object based on the generated information and the information on the intrusion association angle. And means for instructing the ignition operation based on the information on the corrected miss distance, the relative speed signal, and the information on the determined existence quadrant. Characterized in that it Bei.

[0008]

According to the above-described configuration, the target object passing through the vicinity of the flying object is determined by using the target detection signal for each quadrant from the target detector and various signals (target direction instruction signal, relative speed signal, etc.). Calculates the meeting engagement angle and target detection distance of the target object, calculates the intrusion meeting angle of the target object, corrects the miss distance with the target object based on this information, and corrects the intrusion quadrant detection signal of the target object. Sending out. Therefore, it is possible to accurately detect the direction in which the target object is present, and to accurately concentrate the warhead fragments at the optimal timing with respect to the fragile range (hit point) of the target object.

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

[0010]

FIG. 1 shows the configuration of a proximity fuse control device as one embodiment of the present invention. The proximity fuze controller of the present embodiment is mounted on a projectile equipped with a warhead,
And a target guidance device (for example, homing device) 20. The proximity fuze device 10 has a target detector as a main component.
11 (for example, a radio wave type target detector), an angle calculator 14, a target information signal converter 15, and a miss distance corrector 16
Using various control signals (to be described later) output from the target guiding device 20, the device accurately concentrates and strikes the projectiles of the warhead with respect to the invading target object 30. .

Further, the target detector 11 used here is a direction in which a target object invades in any one of at least four quadrants divided in the entire circumferential direction around the axis of the flying object. Can be detected. Here, 4
A device when divided into quadrants will be described as an example. This technique is disclosed in, for example, JP-A-2-25700 or JP-A-2-59690.

Reference numerals AS and AR shown in relation to the target detector 11 indicate a transmitting antenna and a receiving antenna, respectively. The beam projected from the transmission antenna AS is tilted in the forward direction of the projectile and set at a predetermined angle θ (projection beam EB), as shown in FIG. 2, for example, with respect to the entire circumferential direction of the aircraft axis. Projected in a cone shape. The beam projection angle θ is set to an angle suitable for the relative speed with respect to the target object in consideration of response characteristics and the like by signal processing and the like.

Further, the transmission / reception combined beam pattern combined by the transmission / reception antennas AS and AR is drawn in the form of an arctangent function as shown in FIG. 3, for example. Target detector 11
Detects a reflected wave from the target object 30 that has entered the projection beam through the reception antenna AR, compares the level of the detection signal corresponding to the detected reflected wave with a predetermined threshold level, and in each quadrant. Detection signal Ei (i = 1,2,3,
4) is output and sent to the signal comparator 12 and the angle calculator 14, respectively. Further, the target detector 11 sends an instantaneous detection signal for detecting the target object 30 to the quadrant determiner 13 and the detonation timing generator 17 as a trigger pulse signal S _L.

As shown in FIG. 4, for example, the signal comparator 12 is composed of a commonly used comparator circuit, and compares the output signal levels of adjacent quadrant detection beams. For example, in comparing the levels 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. 5) and sent to the quadrant determiner 13. Similarly, the beam (E2) signal and the beam (E3) signal are
The beam (E4) signal and the beam (E3) signal are compared by the comparator 3, and the beam (E1) signal and the beam (E2) signal are compared by the comparator 4.
Are compared with each other, and each binary signal output is sent to the quadrant determiner 13.

The quadrant determiner 13 inputs the trigger pulse signal S _L output from the correlation filter module (not shown) in the target detector 11 as a latch signal. This latch signal is used to hold the binary signal output from each comparator of the signal comparator 12. The quadrant determiner 13
The existence quadrant of the target object 30 is determined based on the holding state of the binary signal output from the signal comparator 12. For example, if the target object exists in the 4th quadrant, the outputs of comparators 2 and 3 are "0".
Then, the outputs of the comparators 1 and 4 become "1", and this state is judged to be (present quadrant = fourth quadrant) and output to the detonation timing generator 17.

Table 1 shows the relationship between the existence quadrant of the target object and each comparator output. Table 1 Signal comparator output [Target existing quadrant signal] 1st quadrant 2nd quadrant 3rd quadrant 4th quadrant Comparator 1 1 1 1 0 0 Comparator 2 0 1 1 1 0 Comparator 3 0 0 1 1 1 Comparator 4 1 0 The 01 angle calculator 14 receives the detection signals E1 to E4 for each quadrant from the target detector 11 by four built-in calculators C1 to C4 (see FIG. 6), respectively, and outputs the first to fourth angles. The intrusion association angle (α) of the target object in each quadrant is calculated, the addition and selection processes are appropriately performed, and the calculation result Vα is sent to the miss distance corrector 16. Regarding this technique, for example, Japanese Patent Laid-Open No. 1-30
It is disclosed in Japanese Patent No. 4377.

The angle calculator each calculator within 14 C1 -C4 generates an operation output signal Sα ₁ ~Sα ₄ based on the following equation. This calculation is, for example, AD manufactured by Analog Devices
It can be implemented with a Model 639, universal trigonometric generator. Operator C1 Sα ₁ = tan ^-1 [(E2-E4) / (E1-E3)] Operator C2 Sα ₂ = tan ^-1 [(E3-E1) / (E2-E4)] Operator C3 Sα ₃ = tan ^-1 [(E4-E2) / (E3-E1)] computing unit C4 Sα ₄ = tan ^-1 [(E1-E3) / (E4-E2)] For example, as shown in FIG. If the object exists in the direction of the angle α in the clockwise direction from the center (0 °) of the fourth quadrant, the reflected waves from the target object are detected by the beams 1 to 4 and the respective reception levels as detection signals E1 to E4. Is output and is input to the angle calculator 14.

In FIG. 6, each calculator in the angle calculator 14
C1 to C4 receive the input signals E3, E4, E1 and E2 and receive the target object existing direction angle α in each quadrant (90 ° to 180 ° in the first quadrant).
°, 180 ° to 270 ° in quadrant 2, 270 ° in quadrant 3
The output signals Sα _{1 to} Sα ₄ corresponding to 0 ° to 0 ° and 0 ° to 90 ° in the fourth quadrant are generated, and an angle calculation voltage (a voltage equivalent to 90 ° in the first quadrant, a second A voltage equivalent to 180 ° in the quadrant, a voltage equivalent to 270 ° in the third quadrant, and 0 in the fourth quadrant is sent to the corresponding adders A1 to A4.

Each of the adders A1 to A4 has a corresponding arithmetic unit C1 to C4.
The predetermined base voltages V _{B1 to} V _B4 are added to the voltages corresponding to the output signals Sα _{1 to} Sα ₄ of the above, and the outputs are sent to the corresponding switches S1 to S4. For example, taking the adder A4 as an example, as shown in FIG. 7, the output signal level V.alpha corresponding calculator C4 (broken line) as the base voltage V _B4 V.alpha /
2 (solid line display) is added. The base voltages set in the adders A1 to A4 are: V _B1 = 3Vα / 2, V _B2 = 5V
α / 2, V _B3 = 7 Vα / 2, and V _B4 = Vα / 2 (see FIG. 8).

The switches S1 to S4 are quadrant determiners, respectively.
In response to the existence quadrant determination signal S _Q from 13, the output or interruption of the signals Sα _{1 to} Sα ₄ (angle calculation voltage) after addition of the base voltage is controlled. As described above, the angle calculator 14 calculates a voltage corresponding to the target existing direction angle α for each quadrant, and furthermore, base voltages 3Vα / 2, 5Vα for the first, second, third, and fourth quadrants, respectively. / 2, 7Vα / 2 and Vα /
2 is used to generate the angular voltages Vα _{1 to} Vα ₄ , so that the target existing direction angle α in each quadrant can be detected in all directions (α = 0 ° to 360 °). (See FIG. 8).

[0021] For example if the target object exists within the fourth quadrant, only the switch S4 is to function in response to the presence quadrant decision signals S _Q from quadrant decision device 13, whereby the 0 ° to 90
The existence direction angle α of the target object within ° is detected. In other words, the existence quadrant determination signal S _Q is an unnecessary calculation in order to prevent the output of other angle calculation other than the necessary angle calculation (in this case, the angle calculation of α = 0 ° to 90 °). It is used to prevent the action.

As shown by way of example in FIG. 9, the target information signal converter 15 outputs a target direction indicating signal (azimuth angle S _AZ , elevation angle S _EL ) from the target guiding device 20.
, _A target direction angle converter 51 that calculates the direction of the direction of the target object (target direction angle θ _A ) using the relative speed signal S _{VC, the} own speed signal S _VM, and the target direction angle (θ _A ). Engagement angle calculator 52 that calculates the engagement angle (θ _MT ) with the target object
Similarly, a forward / backward attack determiner that performs forward / backward attack determination (S _VH , S _VT ) inference calculation using the relative velocity signal S _{VC, the} own velocity signal S _VM, and the target direction angle (θ _A ).
53 and target detection using the target direction instruction signals S _AZ and S _EL , the target direction angle (θ _A ), the relative speed signal S _{VC, the} own speed signal S _VM, and the forward / backward attack instruction signals S _VH and S _VT. The target detection distance calculator 54 calculates a distance (RT).

Although the data of the target direction angle (θ _A ) is generated by the target direction angle converter 51, the data is generated by the target guidance device 20 and then directly input to the engagement angle calculator 52. May be configured. In the above configuration, the meeting engagement angle (θ
_MT ) is calculated based on the following formula. θ _MT = θ _A + tan ⁻¹ [S _VM · sin θ _A / (S _VC −S _VM · cos θ _A )] The target detection distance (RT) is calculated based on the following equation.

RT = ± R _WH / cos θ / [tan {θ _A + tan ^-1 [S _VM · sin θ _A / (S _VC −S _VM · cos θ _A )]} ± tan θ] where R _WH Is the effective radius of the warhead, and θ is the projection angle of the beam from the transmitting antenna AS. The polarity of the target detection distance (RT) changes depending on the forward (or backward) attack on the target object 30 and the intrusion into the projection beam, and the forward / backward attack is determined by the forward / backward attack instruction signal S _VH , It is performed using S _VT , and the intrusion situation is determined according to the polarity states of the target direction instruction signals S _AZ and S _EL from the target guidance device 20.

The forward / backward attack is determined as follows. (S _VC ) ≧ (S _VM ) · cos θ _A → forward attack (S _VC ) <(S _VM ) · cos θ _A → back attack This determination result is the forward attack instruction signal S _VH or the backward attack instruction signal S _VT. Is output as

As shown in FIG. 10 and FIG. 11, the miss distance corrector 16 determines the warhead from the engagement angle (θ _MT ) at the point A where the target object meets the projection beam and the target detection distance (RT). A difference due to the angle of engagement (θ _MT ) between the point B at which the target object meets the scatter surface of the bullet, ie, the point A, is determined. Further, the miss distance corrector 16 obtains information on the intrusion association angle α from the angle calculator 14 (angle calculation voltage Vα) and A
From the displacement angle β between the point and the point B, the distance (R _F ) from the warhead to the point B where the target object meets is calculated, and further, the distance (R _AB ) between the points A and B is calculated. , And sends the calculation result to the initiation timing generator 17 as the miss distance correction signals R _F and R _AB . 10 is a side view of the projectile, and FIG. 11 is a view of the projectile flying direction surface in the fourth quadrant as seen from the rear of the projectile.

The detonation timing generator 17 is the target detector 11
Presence quadrant decision signals S _Q and Miss distance corrector from quadrant decision device 13 based on the trigger pulse signal S _L from
Miss distance correction signal R _F from 16, R _AB and forward / backward attack instruction signal S from the target information signal converter 15
_{Using VH} (S _VT ) and the relative velocity signal S _VC from the target guidance device 20, the detonation time (ΔT) is controlled so that the bullet piece of the warhead hits the fragile range of the target object at a timely timing,
An ignition timing signal in the direction of the target object is sent to the warhead. The detonation time (ΔT) is expressed by the following formula.

[0028] [Delta] T = T _F - [T _AB + (T _DH or T _DT)] where, T _F denotes a time bullet piece warhead is scattered to point B, the table in T _F = R _F / V _F And V _F represents the speed at which the fragments fly. T _AB is the time at which the target object meets point B from point A (T _AB = R _AB / S _VC ), T _DH is the time to the fragile range (hit point) of the target object in the case of a forward attack,
T _DT indicates the time to the vulnerable range (a hit point) of the target object in the case of a rear attack, respectively.

Note that the response time of the target detector 11, the signal processing time, and the time until the warhead detonation are included in ΔT. According to the proximity fuse control device of the present embodiment configured as described above, the following advantages can be obtained. (1) Based on the control beam S _AZ , S _EL , S _VM and S _VC output from the target detector 11 and the target beam of the target detector 11, a meeting and engagement with the target object passing near the flying object is performed. The angle and target detection distance are calculated, and the forward / backward attack determination results S _VH and S _VT are used together to estimate and correct the miss distance, thereby accurately transmitting the intrusion quadrant detection signal of the target object, The detonation timing signal is adjusted and sent to the warhead so that the projectiles can be concentrated and hit at the optimum timing within the vulnerable range (the hit point) of the target object. Therefore, there is an improvement effect of maximally utilizing the power of the warhead and improving the shooting down ability.

(2) The target detector 11 directly performs spread code coding on the transmission wave, and the transmission power density per unit frequency band is suppressed to be small. Therefore, it is hard to be detected by the other party, and even if it is disturbed, it is correlated inside the target detector, so that it is not affected at all by the other party who does not know this modulation code (pseudo random code). There is an advantage.

Further, by using the millimeter-wave target detector, it is possible to utilize the propagation loss characteristic due to the resonance absorption inherent in the millimeter wave, and to be less susceptible to discovery or interference from the other party. . (3) The target detection effective range of the target detector 11, that is, the round trip distance of the radio wave can be set by the oscillation frequency of the transmission modulation code,
The detection range of the target object can be matched with the effective range of the warhead. In addition, it is possible to accurately estimate in which direction the target object is viewed from the flying object (quadrant determination).

[0032]

As described above, according to the present invention, since the miss distance between the target object passing near the flying object and the target object is estimated and corrected, the existence direction of the target object can be determined. In addition to accurate detection, it is possible to precisely concentrate the warhead fragments at the optimal timing with respect to the target object.

[Brief description of the drawings]

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

FIG. 2 is a diagram showing a beam projection state.

FIG. 3 is a diagram showing a transmission / reception combined beam pattern in each quadrant and a direction in which a target object exists.

FIG. 4 is a circuit diagram showing a configuration example of a signal comparator in FIG.

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

6A and 6B are views for explaining the configuration and operation of the angle calculator in FIG.

7 is an output characteristic diagram of an arithmetic unit corresponding to the fourth quadrant in FIG.

FIG. 8 is an output characteristic diagram of the angle calculator of FIG. 6;

9 is a block diagram showing a configuration example of a target information signal converter in FIG.

10 is a diagram for explaining the operation of the miss distance corrector in FIG. 1.

11 is a diagram for explaining the operation of the miss distance corrector in FIG. 1.

[Explanation of symbols]

10 ... proximity fuse device 11 ... target detector 12 ... signal comparator 13 ... quadrant judgment device 14 ... angle calculator 15 ... target information signal converter 16 ... mis-distance corrector 17 ... detonation timing generator 20 ... target guidance device 30 ... output signal RT ... target detection distance of the target object E1 to E4 ... target detector (signal) R _F, R _AB ... miss distance correction signal S _AZ, S _EL ... target turn signal S _VC ... relative velocity signal S _VM ... own speed signal S _VH , S _VT ... forward / rearward attack instruction signal S _Q ... existence quadrant determination signal Vα ... output signal voltage of angle calculator (information of intrusion meeting angle of target object) θ _MT ... target object Meeting angle of engagement with (signal of)

Claims (4)

(57) [Claims] 1. A device mounted on a projectile equipped with a warhead, for instructing the ignition operation of the ammunition of the warhead when the projectile approaches the target object (30), and capturing the target object and Performs control for tracking, a target direction indicating signal (S _AZ , S _EL ) indicating the direction in which the target object is present, and a relative speed signal (S _VC ) indicating a relative speed between the target object and the target object. Means (20) for outputting an own-machine speed signal (S _VM ) indicating the speed of the flying object, and the flying object for each quadrant of at least four quadrants divided in all directions around the axis of the flying object The projection beam is projected in the shape of a cone at a predetermined set angle toward the front direction of each, and the detection signal corresponding to the signal intensity for each quadrant by detecting the reflected wave from the target object with respect to the projection beam (E1 ~ The target detector (11) that outputs E4) and each detection signal output from the target detector. Comparing each adjacent quadrant signal level, the circuit to determine the existence quadrant of the target object based on the result of the comparison (12, 13), and in each quadrant based on each detection signal from the target detector An angle calculating means (14) for calculating the ingress meeting angle of the target object, and calculating and outputting the invasion meeting angle (Vα) of the target object in the omnidirectional direction using the calculation result and a predetermined reference value, and the target. Generates target information regarding a meeting engagement angle (θ _MT ) with the target object and a target detection distance (RT) based on a direction signal, a relative speed signal, and a speed signal of the aircraft, and the generated information and the intrusion meeting angle. Means (15, 16) for estimating and correcting a miss distance with the target object based on the information of the target object, information of the corrected miss distance (R _F, R _AB ), the relative speed signal, Information on the determined existence quadrant (S _Q ).
And a means (17) for instructing the ignition operation based on the above. 2. A proximity fuze control device in which the target detector detects a target object in each quadrant divided into four quadrants, wherein the angle calculation means (14) is: Inverse tangent function, ie, Sα ₁ = tan ^-1 [(E2-E4) / (E1-E3)], Sα ₂ = tan ^-1 [(E3-E1) / (E2-E4)], Sα ₃ = tan ^-1 [(E4-E2) / (E3 -E1) ], and the S.alpha ₄ = tan ^-1 [(E1-E3) / (E4 -E2) ] the detection signals E1~E4 from the target detector using Based on each quadrant, the computing unit calculates the angle of the target object's existence direction and outputs signals Sα _{1 to} Sα ₄ according to the calculated values (C 1 to
And C4), the adder for generating the respective voltage corresponding to each signal the output by adding a predetermined base voltage (V _B1 ~V _B4) and angle calculation voltage _{(Vα 1 ~Vα 4) (A1} ~A4 ) And among the generated angle calculation voltages, only the angle calculation voltage corresponding to the existence quadrant of the target object is used as the existence quadrant determination signal (S _Q ).
2. A proximity fuse control device according to claim 1, further comprising means (S1 to S4) for selectively outputting in response to the control signal. 3. An arithmetic unit for calculating an associated angle of engagement with the target object based on the target direction instruction signal, the relative speed signal, and the own-vehicle speed signal.
(52), a judging unit (53) for estimating forward / backward attack judgment on the target object based on the target direction instruction signal, the relative speed signal and the own-vehicle speed signal, and a forward / backward judgment from the judging unit. An arithmetic unit (54) for calculating the target detection distance based on an attack instruction signal (S _VH , S _VT ) and the target direction instruction signal, a relative speed signal and an own speed signal. The proximity fuze control device according to 2. 4. A proximity fuze control device configured to output a momentary detection signal when the target detector detects a target object as a trigger pulse signal (S _L ), and commands the ignition operation. Means (17) is based on the trigger pulse signal as a reference, the presence quadrant determination signal and the information of the corrected miss distance, the forward / backward attack instruction signal and the relative speed signal based on the weakness of the target object The proximity fuze control device according to claim 3, wherein the timing of the ignition operation is controlled so that a bullet piece of a warhead hits a range.