JPH0447965A - Device for detection of point of impact - Google Patents

Abstract

PURPOSE:To detect accurate position of a point of impact without delay by a method wherein sound and light emitted from the point of impact are inputted with a sound collector and a light receiver installed on a gimbal, and the direction of the point of impact is sought by deflection angle of the gimbal that is controlled to make the optical axis of the light receiver directed toward the point of impact, and the range is sought by a time lag in arrivals of the sound and the light. CONSTITUTION:A data-analyzing section 5 receives outputs from a sound collector 1 and a light receiver 2 and computation is made, based on a time lag in arrivals of sound and light being derived from the difference between sonic speed and light velocity, and thereby the range (up to a point of impact) is calculated. The result of the calculation is supplied to a display section 7 for display. A deflection angle of a gimbal 3 to the point of impact P is calculated, based on the deviation of explosion flash caught with the light receiver 2 from the center of an array of light-receiving elements, and data for making the optical axis of the light receiver 2 directed to the point of impact P is sought. The data are than supplied as control signals to a control section 6. The control section 6 controls, based on these control signals, a driving section 4 so that the gimbal 3 is directed toward the point of impact P. The position of the point of impact P can be easily determined, based on the deflection angle of the gimbal 3 and information about the range, and the determined position is supplied to the display section 7.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a bullet impact position detection device, and more particularly to a bullet impact position detection device that automatically detects the impact point of a shell after being fired.

[Conventional technology]

Conventionally, in order to know the landing position of bullet 1, as shown in Figure 2,
A person 9 looked at the impact point P using binoculars 8 and estimated the distance and direction to the impact point P.

[Problem to be solved by the invention]

The above-mentioned conventional bullet position detection method has a disadvantage in that the accuracy is low because one person estimates the distance and direction, and the accuracy varies greatly depending on the ability and experience of the estimator.

[Means to solve the problem]

The impact position detection device of the present invention includes a jimpal with two degrees of freedom,
a sound collector mounted on the gimbal; a light receiver by an imaging camera mounted on the gimbal together with the sound collector with its center axis parallel to the sound collector; a drive unit that drives the gimbal; a data analysis unit that calculates impact position data based on the outputs of the receiver and the light receiver; and a data analysis unit that controls the drive unit based on the impact position data calculated by the data analysis unit to direct the gimbal to the impact position. a control unit;
and a display section that displays the impact position data in a predetermined format.

Further, the impact position detection device of the present invention calculates the impact position data based on azimuth information based on the angle at which the gimbal points, and time difference information between the input sound of the sound collector and the light reception input of the light receiver. It has the desired configuration.

〔Example〕

Next, one embodiment of the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram of one embodiment of the present invention. The configuration of the embodiment shown in FIG. 1 includes a sound collector 1.

Light receiver 2, and 2 degrees of freedom equipped with these sound collectors and light receivers.
a gimbal 3, a drive section 4 that drives the gimbal 3, and a data analysis section 5 that calculates impact position data based on the outputs of the sound collector 1 and the light receiver 2.

A control unit 6 that controls the drive unit 4 and directs the gimbal 3 to the impact position based on the impact position data calculated by the data analysis unit 5, and a display unit 7 that displays the single impact position data in a predetermined format. Be prepared.

Next, the operation of this embodiment will be explained.

The sound collector 1 and the light receiver 2 are mounted and arranged on a gimbal 3 having two degrees of freedom with their respective central axes parallel to each other.

The impact point P is sufficiently far away compared to the spacing between the sound collector 1 and the light receiver 2, and therefore the sound collector 1 and the light receiver 2 are able to detect the explosion sound at the impact point P. and the explosive light emission that occurs simultaneously is captured as almost a common point source and point light source.

The photodetector 2 has an imaging camera and detects the explosive light emitted at one impact point P using one of the arrayed light receiving elements as the center. Therefore, if the impact point P is captured on its central axis, the central part of the impact light can be detected. The light is received by an array of light receiving elements located at This means that when the impact point is captured by an arrayed light receiving element other than the central part, if the gimbal 3 is driven by the driver 4 so that the light emitting part of the arrayed light receiving element is aligned with the center of the screen of the second display section 7, the light receiving element 2 can be directly opposed to the impact point P.

The sound collector 1 collects the explosion sound at the first bullet impact point P.

The main purpose of sound collection by the sound collector 1 is to capture the explosion sound at the impact point P, and to provide information on the distance to the impact point from the capture time difference between this explosion sound and the explosion light captured by the light receiver 2. It is not necessary for the light receiver 2 to be directed with high precision to the target point of impact P, and it is sufficient to point it approximately at the point of impact and reliably capture the explosion sound.

The data analysis unit 5 receives the outputs of the sound collector 1 and the light receiver 2,
The distance to the impact point P is calculated from the arrival time difference due to the difference between the speed of sound and the speed of light, and the display section 7 displays the value 9.

In addition, the data analysis unit 5 calculates the gimbal deviation angle with respect to the impact point based on the deviation of the position of the array light receiving element of the explosive light emission captured by the light receiver 2 from the array center, and calculates the deviation angle of the gimbal with respect to the impact point.
The data for directing the optical axis of the target to the impact point P is obtained and is supplied to the control unit 6 as a control signal. Based on this control signal.

The control unit 6 controls the drive unit 4 to direct the gimbal 3 in the direction of the impact point P.

The position of the impact point P is easily determined based on the gimbal deflection angle and distance information described above, and is supplied to the first display section 7.

Although the impact position can be detected in this manner, as is clear from the above description, at least two impact shots are required for such impact position detection. In other words, the probability that everything will be completed in one operation is extremely low, and although a minimum of two bullet impacts is assumed, the number of times that two bullet impact points are observed is usually carried out at least several times. is not a problem at all.

In this way, the position of the impact point can be automatically detected.

[Effects of the Invention] As explained above, the present invention uses a sound collector and a light receiver mounted on a gimbal to input sound and light emitted from a point of impact, and aligns the optical axis of the light receiver with the point of impact. By controlling the gimbal so that it follows the direction and determining the azimuth from the deflection angle, and calculating the distance to the impact point from the arrival time difference between light and sound, and displaying impact position information based on this azimuth and distance. This has the effect of being able to detect the impact position with high precision and high speed.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is an explanatory diagram showing conventional impact position detection. 1... Sound collector, 2... Light receiver, 3... Gimbal,
4... Drive section, 5... Data analysis section, 6... Control section, 7... Display section, 8... Binoculars, 9... Human.

Claims (1)

[Claims] 1. Light reception by a gimbal with two degrees of freedom, a sound collector mounted on the gimbal, and an imaging camera mounted on the gimbal together with the sound collector with its central axis parallel to the sound collector. a drive unit that drives the gimbal, a data analysis unit that calculates impact position data based on the outputs of the sound collector and the light receiver, and a data analysis unit that calculates impact position data based on the impact position data calculated by the data analysis unit. A landing position detection device comprising: a control section that controls the drive section and directs the gimbal to a landing position; and a display section that displays the landing position data in a predetermined format. 2. The impact position data is obtained based on azimuth information based on the angle at which the gimbal points, and time difference information between the input sound of the sound collector and the received light input of the light receiver. The bullet position detection device described above.