New Procedures to Characterize Drift and Non-Linear Effects of Piezoelectric Force Sensors

This contribution describes new methods to characterize and determine both, the drift and the non-linearity of piezoelectric force measuring devices. The influence of the drift and dif-ferent procedures for the drift calculation are presented. In addition the influence of different load regimes and evaluation procedures is discussed. The measurements carried out reveal that not the drift, but in particular the non-linearity is the criterion crucial for a classification of piezoelectric force transducers according to standards commonly applied to strain gauge force transducers. The results of this contribution are necessary and important for the devel-opment of standards required for the calibration of piezoelectric force measuring devices in force standard machines. 1