CPC G01L 3/10 (2013.01) [G01L 25/003 (2013.01); G01H 1/003 (2013.01)] | 18 Claims |
1. A method for calibrating an output of a torsional vibration transducer, comprising:
receiving, by one or more processors, a plurality of zero-stress measurements of a shaft acquired by a torsional vibration transducer during rotation of the shaft about an axis of rotation and across a plurality of gaps between the torsional vibration transducer and the shaft, wherein the plurality of zero-stress measurements include at least a first zero-stress measurement at a near gap between the torsional vibration transducer and the shaft and a second zero-stress measurement at a far gap between the torsional vibration transducer and the shaft;
calculating, by the one or more processors, at least one calibration coefficient using the plurality of zero-stress measurements; and
calibrating, by the one or more processors, the output of the torsional vibration transducer according to the at least one calibration coefficient to reduce a sensitivity of the torsional vibration transducer to changes in gap between the torsional vibration transducer and the shaft when a torsional vibration of the shaft is measured.
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