APPLICATION OF A LOADING FRAME STRUCTURE TO A FORCE COMPARATOR REFERRING TO A TUNING-FORK-TYPE FORCE TRANSDUCER

A loading frame structure and a piezoelectric actuator were applied to a force comparator referring to a tuning-fork-type force transducer. The gravitational force acting on the loading frame was shared between the reference transducer and another transducer under calibration. Introduction of the loading frame structure improved reproducibility of the force transducer under calibration, and the piezoelectric actuator improved force controllability in comparison with that of the previous reported force comparator. Because of the excellent linearity and small hysteresis of the reference transducer, the force comparator showed a capability comparable to dead- weight-type force standard machines.