A simple method for reciprocity calibration of accelerometers and velocity sensors is presented. The useful frequency range is from about 1 Hz to a kilohertz or more and the method is capable of subpercent accuracy. Calibrations with excitation levels from 1 to 300 mm/s2 (0.1 mg to 0.03 g) were produced in prototype fixtures. The device to be calibrated and two geophones are used in the calibration fixture. Since the geophones are both reciprocal, a direct test of reciprocity can be done prior to the calibration to evaluate the apparatus. In contrast to standard techniques, the method requires only one relatively inexpensive mechanical setup.
All Science Journal Classification (ASJC) codes
- Arts and Humanities (miscellaneous)
- Acoustics and Ultrasonics