Research on Output Characteristics of Piezoelectric Accelerometers for Low-Frequency Vibration
Piezoelectric accelerometers are widely used for the measurement of middle- or high-frequency vibration. It is necessary to verify via experiments whether piezoelectric accelerometers can accurately measure low-frequency vibration. An experiment is designed to test the output characteristics of piezoelectric accelerometers for vibration of 1~5 Hz frequency, using a standard vibrator at low frequency (≤5Hz) and an accurately calibrated non-contact eddy current sensor as datum sensor. The experiment shows that the output characteristics of piezoelectric accelerometers are relatively stable when measuring vibration of 4~5Hz frequency. However, the output characteristics of accelerometers change with the frequencies and accelerations of vibration when the vibration frequencies are 1~3 Hz. It will affect the accuracy of vibration measurement.
Liangchi Zhang, Chunliang Zhang and Tielin Shi
C. F. Zhu et al., "Research on Output Characteristics of Piezoelectric Accelerometers for Low-Frequency Vibration", Advanced Materials Research, Vols. 139-141, pp. 2460-2463, 2010