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Proceedings Paper

In�Bore Projectile Velocity Measurement With Laser Interferometer
Author(s): Zou Wenhao; Yuan Guifang; Tian Qingzheng; Zheng Bo; Wu Cheng
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Paper Abstract

The measurement of axial motion of the projectile along the gun barrel against time is one of the important methods to study the work-doing ability of propellant powders. The interaction between gun bore and projectile is interesting to many ballistician and designers. The velocity of the projectile changes from zero to several thousand meters per second, so it is difficult to observe the velocity history because of its highly non-linear velocity history and short effective time interval. The whole course in barrel is of great interest. For designers, the shooting moment is the most interesting. The measurement of the data is the most difficult task, and therefore, the highest resolution of the instruments used is requised. Because of its high resolution, F-PVIS is the suitable equipment for measuring the projectile moving in the bore. The retroreflector used is the key element of success and must meet strict requirements. The CV' He-Ne laser beam is di-rected via a-4disposable mirror down the barrel onto the retroreflector glued to the projectile. The Dapple shift of wavelength of reflected beam is proportional to the projectile velocity. Then, the shifted beam passes through a F-P interferometer and is recorded with an image converter tube camera. The basic principles are discussed together with some typical results from the experiments on 30 mm smooth bore gun. It is important to seal powder gases and nylon driving band can be used.

Paper Details

Date Published: 7 June 1989
PDF: 3 pages
Proc. SPIE 1032, 18th Intl Congress on High Speed Photography and Photonics, (7 June 1989); doi: 10.1117/12.969183
Show Author Affiliations
Zou Wenhao, Xian Modern Chemistry Research Institute (China)
Yuan Guifang, Xian Modern Chemistry Research Institute (China)
Tian Qingzheng, Xian Modern Chemistry Research Institute (China)
Zheng Bo, Xian Modern Chemistry Research Institute (China)
Wu Cheng, Xian Modern Chemistry Research Institute (China)

Published in SPIE Proceedings Vol. 1032:
18th Intl Congress on High Speed Photography and Photonics
DaHeng Wang, Editor(s)

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