impulse force calibration with dropped mass and laser vibrometer

One impulse force device is set up in CIMM to calibrate force transducers’ sensitivities with dynamic method. The free falling weight impacts the calibrated force transducer to generate large-amplitude inpulse force up to 200kN with (1~10)ms pulse duration, and one extra small inertia mass  is installed  on the top of the falling mass to generate small impulse force down to 20N. The impulse force is measured by laser interferometer to trace the force to mass, time and length. Several Piezoelctric transducers are calibrated with the impulse force device and the amplitude sensitivity’s measurement uncertainty is below 2%.