In-Bore Projectile Velocity Measurement With Laser Interferometer

Wenhao, Zou; Guifang, Yuan; Qingzheng, Tian; Bo, Zheng; Cheng, Wu

doi:10.1117/12.969183

Cited by 1 publication

(1 citation statement)

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“…Further, the method requires a reflecting surface, which needs replacement after each round of firing. A related method, 'VISAR' (Velocity Interferometer System for Any Reflector), [4][5][6][7] takes advantage of the Doppler phenomenon in laser beams to measure in-bore projectile velocity. However, such a method can yield significant errors due to the presence of shock heating of ambient gases.…”

Section: Existing Velocity Measurement Methodsmentioning

confidence: 99%

Strain gauge-based method to determine in-cylinder projectile velocity and gas pressure

Vattaparambil Sreedharan,

Tiwari,

Mathur

et al. 2023

The Journal of Strain Analysis for Engineering Design

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Knowledge of internal ballistic pressure and projectile velocity is required to ensure gun safety, reliability, calculation of its range, and evaluation of ammunition. However, existing methods for determining the same are either overly complex, costly or have limitations in their applicability. In this work, the authors address this need by proposing a reliable, simple, cheap, and non-destructive method for determining in-bore pressure, projectile velocity, and acceleration profile using strain measurements. Data from strain gauges were used to detect the projectile’s arrival time at different locations in the barrel and computed projectile velocity and acceleration as a function of projectile position. Finally, acceleration data was used to calculate the pressure behind the projectile. Results were verified using alternative experimental and simulation techniques on two different barrels with different ammunition. It was found that the proposed method works well and thus can be reliably used in similar applications elsewhere.

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Section: Existing Velocity Measurement Methodsmentioning

confidence: 99%