Calibrating technology for high shock at 2×106 m/s 2 based on laser doppler

It is the urgent task to achieve wide range and wide bandwidth of impulse excitation in dynamic performance calibration of high shock sensor. The established high shock calibration device was based on velocity variation calibrating method, using air guns as excitation sources. The method for adjusting and controlling the system stiffness was presented through analyzing the principles of the excitation testing system. Velocity variations of sensor were measured by the calibration devices through laser-Doppler technology. The velocity accuracy has been improved. Experimental results show that the range of the calibration devices is 2×106 m/s2, the bandwidth is ≥100 μ in the range of 2×106 m/s2 and extended uncertainty for shock sensitivity calibration is 5% (k = 2).