Dynamic Error Correction of Force Sensor

The author has proposed a method, the Levitation Mass Method (LMM). In the LMM, the inertial force of a mass levitated using a pneumatic linear bearing is used as the reference force applied to the objects under test, such as force sensors, materials or structures. The inertial force of the levitated mass is measured using an optical interferometer. The author has modified it as calibration methods for the three typical types of the dynamic forces, that are the dynamic calibration method under impact load, the dynamic calibration method under oscillation load and the dynamic calibration method under step load. Recently, a method for evaluating and correcting the effect of the inertial mass on dynamic force measurements has been proposed based on the LMM. In this paper, the recent achievement and the future prospects on the methods and the instruments for correcting the effect of the inertial mass on dynamic force measurements based on the LMM are discussed.