Abstract
The absolute measurement of seismic sensor sensitivity is conducted through the application of interferometry to a primary method of accelerometer calibration. Recently, several methods for seismometer calibration were published as ISO standards. These standards are limited to utilization of the comparison and in-situ methods; therefore, it is essential that there is a reference sensitivity available that is based on absolute calibration. This reference will be inherently useful for the calibration of accelerometers because seismic sensors are also used as transducers in measuring vibration for this purpose. The sensitivity of a seismic accelerometer and two different broadband seismometers are measured using the sine-approximation method and it is observed that this method can be applied to the absolute calibration of seismometers for the frequency range that is of interest to seismology. Moreover, the effects of sensor direction misalignment and imbalance are observed in the actual measurements.
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Schedule a callMore From: Transactions of the Korean Society for Noise and Vibration Engineering
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