Veiling target with big target face

Abstract

The invention discloses a light curtain target with a large target surface, which is used for the measurement of the velocity of shells or bullets or explosive fragments with a caliber below 30mm. It is a light curtain target with an effective area greater than 1000mm×1000mm. device, and the two diaphragms that are set will limit the cone-shaped light-emitting space to a thin sheet; because the light-emitting devices and receiving devices arranged in a line can expand the length of the arrangement without limit, so the size of the linear light-emitting source of the present invention can be It exceeds the size of all current light curtain targets; and the effective target surface can be designed according to any size according to user requirements, and digital filtering is used to filter out shock wave interference and mosquito interference, which improves the stability of the system.

Description

technical field [0001] The invention relates to the field of internal ballistic testing of projectiles, in particular to a light curtain target with a large target surface for measuring the flying speed of projectiles with a caliber below 30 mm. Background technique [0002] In the development and production of weapons and equipment, projectile velocity and radio frequency parameters are key parameters that need to be tested frequently. There are already a series of test instruments and equipment in the field of projectile velocity measurement. The most commonly used is the speed measurement system composed of the section device and the time measuring instrument. At present, the section devices commonly used in domestic shooting ranges are coil targets, sky screen targets and small target surface light curtain targets. They all use the principle of non-contact testing to detect projectiles. the passing moment. The speed measurement of Dakou Jing projectile is generally car...

AI Technical Summary

Problems solved by technology

The speed measurement site for small-caliber projectiles is indoors or semi-indoor. Since the sky above the site is covered, the sky target cannot be used, so it is necessary to configure the artificial light source on the sky target to complete the speed measurement, as the invention mentioned in Chinese patent CN 1046975A, but It is difficult to arrange, and the target distance is difficult to accurately calibrate

Compared with the sky curtain target, the light curtain target can be used all-weather, indoors and outdoors, but the effective target surface of the TJ-1 laser target, XGK-91 light curtain target, B470, B471 light curtain target used in the domestic shooting range They are all small, which can meet the requirements for testing small-caliber projectiles, but there are certain safety hazards for testing larger-caliber projectiles

Compared with the sky curtain target and light curtain target, the coil target cannot test the projectile made of non-metallic material, and the magnetism of the material has a great influence on the speed measurement data, so it has been phased out

Some shooting ranges require testing the initial velocity of 25mm and 30mm projectiles, and the existing speed-measuring light curtain target cannot be used; in the test of 14.5mm shelling bullets, there is shelling phenomenon, and the target surface of the speed-measuring light curtain target is also required to be larger

It is reported that there are relatively mature large-surface light curtain target test systems in foreign countries, such as B471 light curtain target, but the price is expensive, and installation, debugging and post-maintenance are relatively inconvenient.

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