Speed testing device and method of non-spliced large-target surface laser light screen

Abstract

The invention discloses a speed testing device of a non-spliced large-target surface laser light screen. A set of linear laser light source is adopted for producing the larger-target surface laser light screen with 90-degree coverage, so that the splicing of the light screen can be avoided; a retroreflector with a serrated structure is adopted as a reflection cooperative target, so that the laser reflectivity in each region is improved and the signal response of a shot when the shot flies across all the regions of the large-area light screen can be ensured; a spherical surface reflecting mirror with a laser emergent hole is obliquely arranged before a laser (namely, a light axis of the spherical surface reflecting mirror and an emergent light axis of the laser form an angle), so that a circular arc-shaped light spot is formed by convergence; a three-section type structure or a circular arc structure is adopted for being connected with a spliced light-sensitive tube array in parallel, so that light transmitting and receiving integrated photoelectric detection of the large-target surface laser light screen with the 90-degree coverage can be realized; and by adopting a maximum negative slope point seeking algorithm, the timing time when the shot flies across the two light screens can be precisely determined, and the more precise speed of the shot can be further obtained.

Description

technical field [0001] The invention belongs to the technical field of photoelectric detection, and relates to a non-splicing large target surface laser light curtain projectile speed detection device and a detection method. Background technique [0002] Projectile velocity is an important element among the various parameters of a weapon system. There are many methods for measuring the velocity of projectiles at home and abroad, among which the section velocity measurement method is one of the most important methods. The specific structure of the section device is generally divided into two categories: contact target and non-contact target. The on-off target in the contact target is measured by contact, which has a great influence on the bullet speed and flight attitude, and affects the test accuracy. Non-contact targets include coil targets, acoustic targets, sky curtain targets and light curtain targets, but when using coil targets, there are special requirements for the ...

AI Technical Summary

Problems solved by technology

[0003] In view of this, the present invention provides a non-splicing large target surface laser light curtain speed test device and method, which can solve the problem of difficult seamless splicing caused by the light curtain splicing method used for large target surface detection

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