A light gas gun millimeter-scale projectile speed measurement system

A millimeter-level, light gas gun technology, applied in radio wave measurement systems, measuring devices, linear/angular velocity measurement, etc., can solve the problem of inability to measure the velocity of small-sized non-metallic projectiles, to solve the problem of millimeter-level projectile velocity measurement and improve Effects of sensitivity and reliability, simplification of optical path structure and circuit structure

Active Publication Date: 2018-12-11
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

[0005] The purpose of the present invention is to provide a light gas cannon millimeter projectile speed measurement system to solve the problem that the existing speed measurement device cannot measure the speed of small-sized non-metallic projectiles; Defects Existing in Ultra-high-speed Impact Measurement of Metal Projectiles

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  • A light gas gun millimeter-scale projectile speed measurement system
  • A light gas gun millimeter-scale projectile speed measurement system
  • A light gas gun millimeter-scale projectile speed measurement system

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Embodiment Construction

[0018] See attached figure 2 , 3 , a light gas gun millimeter-scale projectile speed measurement system, which includes: a target plate 1, a pulse box 2, an oscilloscope 3, a digital signal generator 4, an ultra-high-speed framing camera 5, an ICCD spectrometer 6 and a light curtain target 7;

[0019] The light curtain target 7 includes: an upper reflector 71, a lower reflector 72, a laser emitting device 73, and a photodiode receiving device 74; the upper reflector 71 and the lower reflector 72 are arranged in parallel up and down, and the horizontal accuracy error is within 4 "; The laser emitting device 73 and the photodiode receiving device 74 are respectively installed on both sides of the lower reflecting mirror 72, and the laser emitting device 73 emits light at a set angle, which is reflected in a broken line between the upper reflecting mirror 71 and the lower reflecting mirror 72. , to form a grating with a maximum pitch of 2 mm. If two sets of laser emitting devic...

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Abstract

The invention belongs to the technical field of a superspeed bump experiment, especially relates to a bullet velocity measurement system, and discloses a light-gas gun millimeter-grade bullet velocity measurement system. The technical scheme of the light-gas gun millimeter-grade bullet velocity measurement system is as follows: two or more than two light screen targets (7) are arranged at intervals, a target plate (1) is arranged behind the last light screen target (7), and a photoelectric diode receiving apparatus (74) in each light screen target (7) is connected to a pulse box (2); one path of the pulse box (2) is connected to an oscilloscope (3), and the other path is connected to a digital signal generator (4); and the digital signal generator (4) is connected with and is used for triggering a superspeed framing camera (5) and an ICCD spectrometer (6). The millimeter-grade bullet velocity measurement system is formed by use of the multiple reflective light screen targets, and the problem of mimimeter-grade bullet velocity measurement during the superspeed bump experiment, the problem of synchronous triggering of matched devices and the defect existing in superspeed bump measurement on a metal bullet through a magnetic velocity measurement apparatus are solved.

Description

technical field [0001] The invention belongs to the technical field of ultra-high-speed collision experiments, and in particular relates to a speed-measuring system for millimeter-scale projectiles. Background technique [0002] Under laboratory conditions, ultra-high-speed collision experiments using light gas cannons as loading means have important implications for anti-ballistic missile technology, spaceship protection technology under meteorite impact, research on craters on the surface of terrestrial planets, and the concept of thermonuclear reactions under high-speed impact. It is of great significance to research fields such as the research on the material response characteristics under high pressure. The structure of the common two-stage light gas gun is attached figure 1 As shown, it is composed of high-pressure gas chamber, first stage, high-pressure cone, second stage and target chamber, and can accelerate projectiles with a diameter of less than 6mm to 3-6km / s. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01P3/68
CPCG01P3/685
Inventor 薛一江张庆明龙仁荣陈利侯琼
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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