JPS5952311A - Future position evaluating device - Google Patents

Abstract

PURPOSE:To attain calculation of the hit factor for a firearms controller which hits a bullet to a target, by using a present position signal after calculating an error of the future position and correcting the estimated position although the target having a circular motion, etc. changes its direction. CONSTITUTION:A tracking calculator 3 calculates the moving direction and speed of a target 9 from a present position signal 2 of the target 9 obtained from a radar 1 and sends signals 4 and 5 to firing calculator 6. The calculator 6 shoots a bullet from firearms and calculates the future position where the bullet hits the target 9 by supposing that the direction and speed of the target are constant. Then the calculator 6 transmits a signal 7 to a delay device 16 as well as to a future position error corrector 20, and at the same time a bullet flying time signal 15 to the device 16. The corrector 20 adds a future position error signal 19 to the signal 7 to calculate the corrected future position and sends this position to a hit factor calculator 22 as well as to the firearms as a corrected future position signal 21. The calculator 22 subtracts the signal 2 from the signal 21 sent from the corrector 20 with division of the bullet radius of the firearms 8 to calculate the bullet hit factor. This hit factor is displayed at a display device 24, and the firearms 8 shoots the bullet to a corrected future position 26.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device that is attached to, for example, a fire control device that controls a firearm so that a bullet hits a target, and that accurately predicts a future position.

As a conventional inspection device, there is one shown in FIG.

In the figure, (1) is a radar for tracking a target, (
2) is a current position signal, (3) is a tracking calculation device for calculating the target direction and speed, (4) is a target motion direction signal, (5) is a target speed signal, and (6) is a Shooting calculation device for calculating future position, (7) is future position signal, (8)
is a firearm that fires bullets at future locations.

(9) is the target, (Im is the current position after the bullet flight time, 0
1) is the future position.

Next, the operation will be explained. By tracking the target with the radar (1), the current position of the target can be obtained every moment. The current position obtained is.

The current position signal (2) is sent to the tracking calculation device (3).

The tracking calculation device (3) calculates the target's movement direction and speed from the current position signal (2), and uses the target's movement direction (4) and speed signal (5) together with the current position signal (2) for shooting calculations. Device(
6). A shooting calculation device (6) fires a bullet from a firearm.

A conventional fire control device is configured as described above.

Since the future position is predicted on the assumption that the target's motion direction and speed will not change during the bullet flight time, the target (
9) changes the direction of motion by making a circular motion or the like, there is a gap between the current position a after the bullet flight time and the future position (111), which has the disadvantage of reducing the bullet's hit rate.

Figure 2 shows a case where a difference occurs between the current position trajectory and the future position trajectory due to a conventional fire control system. In Figure 1, 02 is the current position trajectory, 0 snoring is the current position trajectory α Connection, (141 is the locus of the future position. This invention was made to improve such conventional drawbacks, and it is possible to accurately and easily calculate the future position of a target that moves in a 9-circle, etc. , to provide a future position evaluation device that simultaneously calculates and displays the hit rate.

An embodiment of the present invention shown in FIG. 3 will be described below. In the figure, α9 is a bullet flight time signal, αe (3) is a delay device that delays the future position by the bullet flight time in order to compare the current position after the bullet flight time with the future position, +1
71 is a delayed future position signal delayed by bullet flight time;
(18) is a future position error calculation device that subtracts the current position signal (2) from the delayed future position signal αη, (191 is the future position error signal, and (201 is the future position error signal OgI added to the future position signal (7). (21) is a corrected future position signal; +22 is a future position error correction device that automatically corrects the error.
1 by subtracting the current position signal (2) from the modified future position signal (■) and dividing by the bullet effective radius depending on the firearm (8).

A hit rate calculation device that calculates the hit rate, @ is the hit rate signal,
(241 is a display device that displays a hit rate signal, +251 is a future position error, and (a) is a corrected future position.

Next, the operation will be explained. By tracking the target with the radar (1), the current position of the target can be obtained from time to time. The current position obtained is.

As the current position signal (2), the tracking calculation device (3) calculates the movement direction and speed of the target from the current position signal (2), and generates the target movement direction signal (4) together with the current position signal (2). .

A speed signal (5) is sent to the shot calculation device (6).

(4) The shooting calculation device (6) fires a bullet from a firearm.

Although the target position changes during the elapsed time until the bullet reaches the target, assuming that the direction and speed of the target's motion remain the same, the future position, that is, the position where the target and bullet meet, is calculated and the future position signal ( 7), the bullet flight time signal α9 is sent to the delay device r1e at the same time as it is sent to the delay device α and the future position error correction device (a). The future position correction device (a) automatically adds the future position error signal α to the future position signal (7), calculates a corrected future position, sends it to the hit rate calculation device (2), and at the same time calculates the corrected future position. Position signal (2υ), firearm (8
). The accuracy calculation device @ subtracts the current position signal (2) obtained from the tracking calculation device (3) from the corrected future position signal (sha) obtained from the future position error calculation device Kan, and
The hit rate is calculated by dividing by the bullet effective radius depending on the type of firearm (8), and is sent as a hit rate signal (c) to a display device that displays the signal. Firearm (8) fires 9 bullets at the corrected future position (to) K, taking into consideration the hit rate displayed on the 1 display device (goods).

Since this invention has such a configuration, the target (9) makes a circular motion or the like during the bullet flight time and changes the direction of movement.
Even if the current position reaches 0, the corrected future position (a) can be calculated easily and accurately by adding the future position error (a) to the future position Qll, and at the same time, the firearm can be fired towards the corrected future position. 2 depending on the display device (goods) that displays the hit rate.
By being able to time the firing properly, the accuracy of the 9 bullets can be improved.

FIG. 4 shows the trajectory of the current position, the trajectory of the future position, and the trajectory of the corrected future position according to the present invention. In FIG.

Note that although the current position trajectory (2) and the revised future position trajectory plane almost overlap, for convenience of explanation, they are shown separated by a distance that allows them to be distinguished.

In the explanation so far, the case where a target is tracked with a radar has been described, but the present invention is not limited to this, and may be used when a target is tracked optically or with a laser.

As described above, according to the present invention, even if the target changes its direction of movement, it is possible to easily correct future position errors in the future position, and at the same time, it is possible to accurately determine the timing for firing a firearm by calculating the hit rate. There are advantages.

[Brief explanation of the drawing]

Figure 1 is a diagram of the configuration of a conventional fire control device and the relationship between the current position and future position. Figure 2 is a diagram of the relationship between the current position and future position of the conventional fire control system. ,
FIG. 4 shows the structure of a fire control device to which this invention is applied, and a relationship diagram between the current position, future position, and corrected future position. FIG. 3 is a relationship diagram of position trajectories. In the figure, (1) is the radar, (2) is the current position signal, (3) is the tracking calculation device, (4) is the target movement direction signal, (5) is the speed signal, (6) is the shooting calculation device, (7) is the future position signal, (8) is the firearm, (91 is the target, QOI is the current position after the bullet flight time. 01) is the future position, (12 is the trajectory of the current position, α□□
□ is the tangent to the trajectory of the current position, α'' is the trajectory of the future position, α
9 is a bullet flight time signal, Oe is a delay device, α is a delayed future position signal, 0 is a future position error calculation device, 09) is a future position error signal, (A) is a future position error correction device, (
2] + is the corrected future position signal, @ is the hit rate calculation device, □□
□ is the hit rate signal, (goods) is the display device, (a) is the future position error, (261 is the corrected future position according to this invention, and @ is the trajectory of the corrected future position according to this invention. Note that the two figures are the same or , corresponding parts are indicated by the same reference numerals. Agent Shin Kuzuno -

Claims (1)

[Claims] Obtain the position of the target moment by moment by tracking the target with radar etc., calculate the direction and speed of the target's movement, assume that the direction and speed of the movement do not change, In order to compare the predicted position with the current position of the target matched for 9 hours in a future position evaluation device that evaluates the predicted position of the target after the passage of time. A delay device that delays a predicted position by a predetermined time; a future position error calculation device that calculates a predicted position error by subtracting the current position from the delayed predicted position; and a future position error calculation device that adds the predicted position error to the predicted position to correct the next predicted position. Based on the future position error calculation device, the corrected future position signal obtained from the future position error correction device, and the current position signal obtained from the tracking calculation device,
A future position characterized in that it has a hit rate calculation device that calculates a hit rate and a display device that displays the hit rate, calculates the next predicted position using a predicted position error, and calculates and displays the hit rate. Evaluation device.