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Laser light curtain blocking type speed measuring system for measuring light-gas gun millimeter-level bullet speed

A technology of laser light curtain and laser velocimeter, which is applied in the radio wave measurement system, the device used to measure the time required to move a certain distance, and the use of re-radiation, etc., can solve the problems of low precision, high test cost, and low success rate , to achieve the effect of improving measurement accuracy, reducing test cost and reducing repeated tests

Inactive Publication Date: 2014-02-19
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of low accuracy of the existing light gas gun millimeter-scale projectile velocity measurement method; low success rate, repeated tests are required, resulting in high test costs, and a method for measuring the millimeter-scale projectile velocity of the light gas gun is provided. Laser light curtain blocking speed measurement system

Method used

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  • Laser light curtain blocking type speed measuring system for measuring light-gas gun millimeter-level bullet speed
  • Laser light curtain blocking type speed measuring system for measuring light-gas gun millimeter-level bullet speed
  • Laser light curtain blocking type speed measuring system for measuring light-gas gun millimeter-level bullet speed

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specific Embodiment approach 1

[0016] Specific implementation mode one: the following combination figure 1 Illustrate this embodiment, the laser light curtain occlusion type velocity measuring system that is used for measuring the projectile velocity of light gas cannon millimeter level described in this embodiment, it comprises laser velocity meter 1, laser emitting device 2, laser light curtain receiving device 3, velocity measuring signal Display device 4 and speed measuring channel 6,

[0017] The outlet end of the light gas cannon projectile launching device 5 is connected to the speed measuring channel 6, and the laser emitting device 2 and the laser light curtain receiving device 3 are arranged on the opposite surface of the speed measuring channel 6, and the speed measuring signal output end of the laser light curtain receiving device 3 is connected to the laser speed measuring instrument 1 The speed measurement signal input end of the laser speed measurement instrument 1 is connected with the displ...

specific Embodiment approach 2

[0018] Specific embodiment two: this embodiment is further described to embodiment one, and laser emission device 2 comprises n red light semiconductor lasers 2-1, and laser light curtain receiving device 3 comprises n silicon photodiode photodetectors 3-1, n Red semiconductor lasers 2-1 and n silicon photodiode photodetectors 3-1 form n groups of light curtain transmitting and receiving structures, the light curtains of n groups of light curtain transmitting and receiving structures are parallel, and each group of light curtain transmitting and receiving structures includes 1 A red light semiconductor laser 2-1 and a silicon photodiode photodetector 3-1, the light curtain emitted by the red light semiconductor laser 2-1 in the light curtain emitting and receiving structure is photoelectrically received by the silicon photodiode in the group The detector 3-1 receives, n is a natural number, and n=3-10.

[0019] The height of the light curtain acquired by the laser emitting dev...

specific Embodiment approach 3

[0021] Specific implementation mode three: the following combination Figure 7 Describe this embodiment mode, this embodiment mode will be further described to embodiment one or two, laser velocimeter 1 comprises speed measurement signal I / V conversion circuit 7 and signal amplifying circuit 8, the speed measurement signal input terminal of speed measurement signal I / V conversion circuit 7 Connect the speed measurement signal output end of the laser light curtain receiving device 3, the voltage signal output end of the speed measurement signal I / V conversion circuit 7 is connected to the voltage signal input end of the signal amplification circuit 8, and the output end of the signal amplification circuit 8 is connected to the speed measurement signal display device 4 display signal input terminal.

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Abstract

The invention discloses a laser light curtain blocking type speed measuring system for measuring light-gas gun millimeter-level bullet speed and belongs to the field of ground superspeed crash simulation experiments. The problem that an existing light-gas gun millimeter-level bullet speed measuring method is low in accuracy and low in success rate, repeated tests are needed, and accordingly testing cost is high is solved. The system comprises a laser velocimeter, a laser emitting device, a laser light curtain receiving device, a speed measuring signal display device and a speed measuring channel. The outlet end of a light-gas gun bullet launching device is connected with the speed measuring channel, the laser emitting device and the laser light curtain receiving device are arranged on the opposite faces of the speed measuring channel, a speed measuring signal output end of the laser light curtain receiving device is connected with a speed measuring signal input end of the laser velocimeter, and a display signal output end of the laser velocimeter is connected with a display signal input end of the speed measuring signal display device.

Description

technical field [0001] The invention relates to an experimental device for measuring the velocity of a projectile at the millimeter level of a light gas cannon, which belongs to the field of ground ultra-high-speed impact simulation experiments. Background technique [0002] In the ultra-velocity impact experiment of light gas cannon, the impact velocity is one of the most important parameters to describe the state of space debris and analyze the dynamic characteristics of debris and protective layer materials. Therefore, the velocity of the experimental projectile must be accurately measured in the ground ultra-velocity impact simulation experiment. However, in the experiment, the projectile launch speed is very high (generally on the order of several thousand meters per second), the size is relatively small (now the main research is the millimeter-scale projectile), and the projectile material contains metal and non-metal, so in the experiment The measurement of the veloci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01P3/68
Inventor 张伟邓云飞祁楷峰张欣宇任鹏宋林
Owner HARBIN INST OF TECH
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