Particle velocity measurement system for the impact surface and free surface of light-transmitting materials

A light-transmitting material and particle velocity technology, which is applied to devices using optical methods, can solve the problems that the particle velocity of the impact surface of the target plate cannot be measured at the same time, and the particle velocity of the target plate cannot be accurately measured, so that it is not easy to interfere with the environment, The effect of high precision and accurate measurement results

Active Publication Date: 2017-08-25
INST OF MECHANICS CHINESE ACAD OF SCI
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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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  • Particle velocity measurement system for the impact surface and free surface of light-transmitting materials
  • Particle velocity measurement system for the impact surface and free surface of light-transmitting materials

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0021] Such as Figure 1~2 As shown, the particle velocity measurement system of the impact surface of the light-transmitting material and the free surface of the present embodiment includes a first-level light gas gun, a projectile, a target plate 7, a target frame 5, a target box 12, and an all-fiber laser Doppler velocimeter , Recovery cabin 8 and vacuum cabin 11.

[0022] The projectile is made up of a cylindrical bullet holder 3 and a plane flying plate 4 pasted and fixed on the front end of the cylindrical bullet holder 3 . Plane flying plate 4 can be circular, pentagram etc.

[0023] The projectile is placed in the bore 13 of the first-level light gas gun, and is launched by the first-level light gas gun.

[0024] The target plate 7 is made of a light-transmitting material (such as organic glass, inorganic glass or sapphire, etc.), th...

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Abstract

The invention discloses a particle velocity measurement system of the impact surface and the free surface of a light-transmitting material, which includes a launch device, an impact object, a target plate, a target frame, and an all-fiber laser Doppler velocimeter, and the impact object is controlled by the launch device. The target plate is made of light-transmitting material, the impact surface of the target plate is coated with a total reflection film, the free surface of the target plate is coated with a semi-reflective film, the target plate is fixed on the target frame, and is facing the impact object, so The laser lens of the all-fiber laser Doppler velocimeter is directly arranged on the side of the target plate coated with a semi-reflective film, and is at a certain distance from the semi-reflective film. connected to the main body of the instrument. The invention solves the problem that the existing flat plate impact experiment 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, and has the advantages of accurate measurement results, high precision, and less susceptible to environmental interference The advantages.

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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01P3/36
Inventor 汪海英姜智捷戴兰宏林浩张虎生沈乐天邓雅莉李天佑
Owner INST OF MECHANICS CHINESE ACAD OF SCI
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