Device and method for speed test underwater by taking laser light curtain as core

Abstract

The present invention discloses a device and a method for speed test underwater by taking a laser light curtain as a core which solves the important problems of underwater speed test seal and watertightness and effective recycle of light. The speed test device is formed by two sets of laser light curtains and photoelectric detection devices, and each set of the laser light curtain and the photoelectric detection device comprises one photoelectric detector, one laser, one optical fiber array, one optical fiber, one collimator, one laser light curtain and one retro-reflection screen. The lasersare connected with the collimators through the optical fibers, and the collimators are connected with the photoelectric detectors through the optical fiber arrays; the retro-reflection screens are arranged below the collimators; and the whole device is vertically arranged in the water. Electrical signals of the speed test device are amplified through an amplification circuit, and are subjected todata collection and processing to obtain speed parameters of corresponding target objects. The device and the method for speed test underwater by taking a laser light curtain as a core can be used forunderwater and non-contact speed test with fast response speed and accurate measurement.

Description

technical field [0001] The invention belongs to the speed test technology of moving objects, in particular to an underwater speed test method and device with a laser light curtain as the core. Background technique [0002] With the development of science and technology, new requirements are put forward for the development of some underwater equipment. For example, underwater firearms, some underwater weapons and equipment, etc. The flight velocity of the projectile is an important ballistic parameter in the research of firearms, especially the projectile velocity test of firearms in water is very important for the hydrodynamic layout design and ballistic characteristics research. [0003] In the process of developing underwater weapons and equipment, in order to optimize the shape of the projectile to reduce water resistance, we often need to measure the flight speed of the projectile in water, which also provides data support for verifying the internal ballistic model and ...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the problems of severe attenuation of light underwater and uneven distribution of light intensity, and to propose a speed that can be used underwater, non-contact, fast in response, and accurate in measurement with a laser light curtain as the core. Test device and method

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