Torque measurement system

Details Torque measurement system Torque measurement system

G - Physics

01

L

354/28

G01L 3/10 (2006.01)

Patent

CA 1243407

- 1 - Abstract In a system for measuring torque, torsional vibrations and power, emitters and sensors are arranged on at least one rotating shaft. From one of the frequencies (f1 or f2) of the signals (S1 or S2) of the sensors, a new signal (S3) is generated whose frequency (f3) corres- ponds to the sum or difference frequency of the frequen- cies (f1, f2), and which is phase-locked to the signal (S1 or S2) from which it is generated. The rela- tion of the initial phase of the new signal (S3) with the frequency-generating signal (S1 or S2) is determined also by the other signal (S2 or S1). The signals (S1, S2) and the new signal (S3) are fed to a multiplier. The measure of the torsion-dependent twist of the emitters with respect to each other, from which the torsional vibration signal can be derived, is determined by inte- gration of the signal (S1.S2.S3) supplied by the multi- plier over one or several of the least common periods of the frequencies (f1, f2, f3) or by appropriate filtering.

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