Shock Calibration of the High-g Triaxial Accelerometer

This paper describes the calibration of high-g triaxial piezoresistive accelerometer for studies of normal and oblique penetrations into concrete targets. In order to determine the dynamic sensitivity, shock calibration tests were performed using a Hopkinson bar at up to 80,000 g acceleration level and the laser-grating interferometer techniques. Comparisons with the conventional calibration methods places an importance on the transverse sensitivities, influence on the acceleration measurement is impossible to disregard. The experiment of projectile penetration of hard targets was performed. The result showed that the testing signal is more accurate than emulation signal. Agreement between theory and experiment is exhibited for the projectile residual velocity and penetration depths.