New technique for dynamic calibration of a force transducer using a drop ball tester

Abstract

A method to calibrate a force transducer under dynamic conditions has been developed. Calibration is achieved by a drop ball test based on the levitation mass method using an optical interferometer. From the conducted experiments, the output of the force transducer could be corrected, in line with the previous paper written by the authors. Moreover, the dynamic correction coefficient could be obtained by this method, even without an expensive air slider, which was used in our previous method. The calibration performed by the developed method proved to be very significant in correcting the dynamic force measurement error by the force transducer with a very small root mean square (RMS) error compared to the results of measurement in the absence of calibration and dynamic correction. The RMS error of measurement result by the force transducer with dynamic calibration and dynamic correction using the developed method is about 1.6 N. This error is equivalent to 1% of the maximum force applied to the force transducer, which is approximately 160 N.

New Technique for Impact Calibration of Wide-Range Triaxial Force Transducer Using Hopkinson Bar

“…Up to now, the upper limit of the calibration range of vibration calibration facilities can reach 10 kN [8]. In the general impact calibration method [3,[9][10][11][12][13][14], an object of known mass is usually made to collide with the force transducer being calibrated. An impulse 2 of 13 will be generated during the collision, and it will be input to the transducer as a reference force.…”

Metrology and Measurement Systems

“…In dynamic calibration, there must be a method for generating or realizing a dynamic force and also some method for determining the dynamic force realized. The force generator may generate a periodic force (use of electrodynamic shakers) or a transient force (use of impact apparatus) [4][5][6][7][8][9]. Recently, the falling mass has become one of substantial transient methods for the calibration of dynamic force transducers in which the inertial force of the mass is used as a reference force [10,11].…”