INVESTIGATIONS OF PIEZOELECTRIC FORCE MEASURING DEVICES FOR USE IN LEGAL WEIGHING METROLOGY
Oliver Mack
Abstract:
In conjunction with low-drift charge amplifiers static force and weighing measurements get more and more important for piezoelectric force transducers if the measuring time and time of load change are in the range of a few minutes. The presented investigations according to the international recommendation OIML R60 [7] point out, that piezoelectric sensors can be used for static applications with low accuracy requirements (e.g. class D for ordinary accuracy weighing instruments). With suitable methods for compensation or adjustment the sensors even meet the higher requirements of medium accuracy class C (e.g. commercial scales). Especially for high nominal loads the piezoelectric measurement technology offer unused potentials also for static precision measurements.
