| 摘要 |
PROBLEM TO BE SOLVED: To provide a torque measuring method and a device dispensing with processing to a power transmission shaft, capable of acquiring long-term reliability. SOLUTION: This device has a configuration equipped with detectors 4, 5 installed on a driving side detection position 2 and a driven side detection position 3 separated at a prescribed distance in the axial length direction of the power transmission shaft 1 of a rotating machine, for detecting a physical quantity specified as a function of an angle in the circumferential direction on the shaft surface, changing with time periodically by rotation of the power transmission shaft 1; and a signal operation processing device 6 for performing Fourier transform of the detected physical quantity from a time domain to a frequency domain, determining a phase relation between two physical quantities from a phase of a transmission function determined by dividing a value on the driven side by a value on the driving side, and determining a torque applied to the power transmission shaft from the phase relation. COPYRIGHT: (C)2008,JPO&INPIT
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