Evaluation of momentum transfer responses of commercial force transducers

Abstract

Momentum transfer responses of two commercial force transducers are evaluated by means of the developing method based on the law of conservation of momentum. In the method, an object levitated with sufficiently small friction using a pneumatic linear bearing is collided with a force transducer. The inertial force acting on the object is measured as the product of the mass and the acceleration. Approximately 120 sets of collision experiments, whose momentum transfers with the maximum value of approximately 20–120 N with the full width at half maximum (fwhm) of approximately 12–40 ms, have been conducted using two commercial force transducers and two dampers. The instantaneous value of inertial force is measured with the sampling period of approximately 0.15 ms. Its standard uncertainty is approximately 0.9 N, which corresponds to approximately 1% of the maximum applied momentum transfer. The momentum transfers measured by this method and by the transducers coincide within 1% in all the collision measurements.