Research on Velocity Measurement of Projectiles Using High-speed Photography in Strong Impact Test
To improve the effectiveness and accuracy for measuring velocity of projectiles in strong impact test,this paper designed a type of high-speed photography velocity measurement scheme to measure the velocity before impacting of the projectile.According to the test conditions,the key equipment is selected and the high-speed photography velocity measurement system is built,the finite impulse response(FIR)filter selected different half lengths is used to calculate the velocity,and the image tilt distortion is solved by"4 Points Mode".The correctional result of the high-speed photography velocity system was compared to traditional laser test result,which proved that the two test results are highly consistent(the relative error is within 0.5%).Finally,the three groups of continuous exit velocities analyzed by the velocity measurement system prove that the strong impact test system has the ability to provide stable velocity.
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