Method for locating speed measurement of single-row light source double Z shaped reflective light screen target

A positioning method, light curtain target technology, applied in the direction of target, target indicating system, attack equipment, etc., can solve the problem of high precision, achieve the effect of high precision of time measurement, simple method and simple calculation

Inactive Publication Date: 2013-09-25
NANJING UNIV OF SCI & TECH
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Problems solved by technology

The light source used in this method is a non-locatable light source, and the calculation of the spatial coordinates is obtained through time measurement. This method is relatively simple to solve, but because two sets of light sources and detectors are used, the accuracy required for installation and debugging is relatively high.

Method used

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  • Method for locating speed measurement of single-row light source double Z shaped reflective light screen target
  • Method for locating speed measurement of single-row light source double Z shaped reflective light screen target
  • Method for locating speed measurement of single-row light source double Z shaped reflective light screen target

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Embodiment

[0032] 1. Example of derivation process

[0033] figure 1 , assuming that the projectile is incident at a certain angle of incidence, the projectile and the first, second, third, fourth and fifth light curtains S 1, S 2 , S 3 , S 4 , S 5 The intersection points of are F, G, H, I, J. Assume that the moment when the projectile reaches F, G, H, I, J is t 1 , t 2 , t 3 , t 4 , t 5 , count t ij = t j -t i , which means t j with t i time difference. Let the velocity of the projectile be v.

[0034] In the xOy plane, FJ is projectile trajectory projection, FJ and AO, OB, BC intersect at points F, G, H, I, J, because △BGH∽△OGF, △OKG∽△OAB, so Available:

[0035] x G = | OK | = | KA | | FG | | GH | = ( ...

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Abstract

The invention discloses a method for locating the speed measurement of a single-row light source double Z shaped reflective light screen target. Parallel lights emitted by a single-row parallel light sources form a first light screen, the first light screen is reflected by four mirrors to form five light screens, and a light detector is arranged at the tail end of a fifth light screen; pill target speed and two coordinates of cross points of the pill and each light screen on each light screen vertical plane are indirectly obtained according to the size of a target body, time difference and other information; the positions of the pill shielding light rays are obtained by the light detector; and space coordinates of three cross points of the pill and the light screens are fitted to obtain a ballistic trajectory equation, and the useful information, such as the ballistic trajectory equation or the coordinate of a certain point on the ballistic trajectory and the like, is transmitted to a display device or a computer for further processing. The invention can conveniently measure the trajectory of the pill, and can be used for estimating information, such as the coordinates of random targeted points of the pill on the space plane, the speed component of the pill in each direction and the like.

Description

technical field [0001] The invention belongs to the technology of measuring the velocity of projectiles and the coordinates of the impact point, in particular to a single-row light source and double Z-type reflective light curtain target speed measurement and positioning method. Background technique [0002] In addition to the traditional artificial target reporting technology, the existing impact point detection methods mainly use sound, light, electricity and other methods. For example, the conductive rubber target method, the coordinate target based on image processing, the photoelectric coordinate target method, the linear array CCD target method, the acoustic and electric coordinate target method, etc. The conductive rubber target method has the problem of target plate life; the coordinate target method based on image processing adopts the visual processing method, the actual use effect is closely related to the algorithm, and the processing results are uneven; the line...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F41J5/06
Inventor 于纪言王晓鸣李永新李文彬高旭东
Owner NANJING UNIV OF SCI & TECH
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