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

A technology of laser light curtain and testing device, which can be applied to devices that measure the time required to move a certain distance, radio wave measurement systems, and re-radiation of electromagnetic waves. It can solve problems such as difficulty in seamless splicing and improve laser reflectivity , Accurate projectile speed, avoid the effect of light curtain splicing

CN102721826BActive Publication Date: 2013-09-18ZHONGBEI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2013-09-18

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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.
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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 ...

Examples

Embodiment Construction

[0029] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0030] The invention provides a non-splicing large target surface laser light curtain speed test device, such as Figure 7 As shown, including start light curtain I, stop light curtain II and test module, start light curtain I and stop light curtain II are placed parallel to each other and perpendicular to the ballistic line, start light curtain I and stop light curtain II have the same structure, both It includes an original reflection device, a laser 2, a spherical mirror 7 and a detector 9, wherein the laser device 2 is a line laser that can produce a 90-degree divergence angle through one-dimensional beam expansion; the original reflection device includes two mutually perpendicular support surfaces 1 And the reflective screen 3; the laser 2 is placed on the endpoint of the diagonal between the two supporting surfaces 1, and the optical axis of the lase...