System and method for simulating optical signal generation of projectile or fragment passing target by laser light curtain

Abstract

The invention relates to a laser curtain projectile or fragment target passing optical signal simulative generation system and method thereof. The system includes a laser device, an acousto-optic crystal holder, an acousto-optic modulation device drive source, a hardware signal generator, a virtual signal generator and two lenses. The centers of the laser device, the acousto-optic crystal holder and the two lenses are adjusted to be on one horizontal line and fixed, so that an acousto-optic modulation device is enabled to work in a Bragg diffraction conditions. In the virtual target-passing signal generator, according to an actual target passing waveform generation principle, the change process of light shield volume of a projectile or a fragment when passing through a light curtain is analyzed and calculated theoretically, programming is performed for generating ideal simulative target passing signals and radio frequency, speed, time interval and the like are controlled so as to drivethe hardware signal generator to generate the simulative target passing electric signals. The simulative target passing electric signals act as modulation signal to combine with radio frequency signals to act on acousto-optic medium. Laser subjected to strong modulation is emitted after the simulative target passing electric signals and the radio frequency signals pass through the acousto-optic crystal holder and simulative projectile or fragment target passing optical signals are generated and requirements for laser curtain testing system experiments and tests are met.

Description

technical field [0001] The invention belongs to the field of photoelectric testing, and in particular relates to a system and method for simulating optical signals of projectiles or fragments passing through a target in a laser light curtain. Background technique [0002] At present, in the speed test of high-speed targets such as projectiles and fragments of weapons such as guns and warheads, the laser light curtain test system is widely used because of its advantages such as high measurement accuracy, high sensitivity, large test range, and strong anti-interference ability. use. However, the experiment, verification and testing of the performance parameters of the laser light curtain test system can only be carried out through shooting range experiments such as live ammunition shooting or live ammunition explosion. Not only the test cost is high, the risk is high, the cycle is long, and the repeatability is poor. The accuracy of the judging method of the projectile passin...

AI Technical Summary

Problems solved by technology

However, the experiment, verification and testing of the performance parameters of the laser light curtain test system can only be carried out through shooting range experiments such as live ammunition shooting or live ammunition explosion. Not only the test cost is high, the risk is high, the cycle is long, and the repeatability is poor. The accuracy of the method of judging the time of projectile passing the target in the system cannot be researched and tested

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