Measuring system for particle velocity of impact surface and free surface of light transmission material

Abstract

The invention discloses a measuring system for particle velocity of an impact surface and a free surface of a light transmission material. The system comprises an emission device, an impact object, a target plate, a target frame and an all-fiber laser doppler velocimeter; the impact object is emitted through the emission device; the target plate is prepared from the light transmission material; an all-reflection film is plated on the impact surface of the target plate; a semi-reflection film is plated on the free surface of the target plate; the target plate is fixed on the target frame and directly faces the impact object; a laser lens of the all-fiber laser doppler velocimeter is directly arranged one side plated with the semi-reflection film of the target plate and has a certain distance from the semi-reflection film; the laser lens is connected with a main body part of the all-fiber laser doppler velocimeter through optical fibers. With the adoption of the system, the problems that the particle velocity of the free surface of the target plate cannot be accurately measured by the existing flat impact test, and the particle velocity of the impact surface of the target plate cannot be synchronously measured, can be solved; the system has the advantages of being accurate in measuring result, high in precision, and difficultly interfered by the environment.

Description

technical field [0001] The invention relates to a particle velocity measurement system mainly used in flat plate impact experiments, and belongs to the technical field of material testing devices. Background technique [0002] In the fields of engineering applications, such as weapon design and armor optimization, the dynamic mechanical properties of materials and structures under dynamic high pressure are very important. The flat plate impact test device is an effective experimental method for testing the dynamic mechanical properties of materials under dynamic high pressure. [0003] At present, in flat plate impact experiments, light-transmitting materials such as plexiglass are often used as the back plate of the target plate to assist in measuring the particle velocity of the free surface of the target plate. However, due to the slight change in the refractive index of the transparent material under different pressures, the The particle velocity of the free surface of t...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the existing flat plate impact test device cannot accurately measure the particle velocity of the free surface of the target plate, and cannot simultaneously measure the particle velocity of the impact surface of the target plate, the invention provides a light-transmitting material impact surface and free surface particle velocity measurement system

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