Performance of force comparator with reference to tuning-fork type force transducer

Toshiyuki Hayashi, Yoshihisa Katase, Kazunaga Ueda,Tsuyoshi Hoshino, Hiroshi Suzawa, Masaaki Kobayashi

Abstract

A force comparator was constructed using a conventional screw-driving type uniaxial testing machine. A tuning-fork type force transducer was used as the reference. A strain-gauge type force transducer was calibrated with the comparator using springs and bearings to relax eccentric forces and moments. In comparison with a conventional dead-weight type force standard machine, deviation of up to only 1 mN at the rated capacity of 50 N was observed. There were still some limitations in terms of force controlability and obstructive eccentric forces; nevertheless, the force comparator exhibited favorable performance for the calibration of commercial force transducers. The tuning-fork type force transducer was suitable as the reference because of its long-term sensitivity stability and small hysteresis.

Keywords

tuning fork, comparator, testing machine, small force, eccentric force

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IMEKO-TC3-2007-058u.pdf

DOI

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IMEKO TC

TC3 - Measurement of Force, Mass, Torque, and Gravity

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