CIRCUIT ARRANGEMENT FOR MEASURING TORQUE

摘要

The frequency convertor produces a signal from the frequency of one of two detection signals. The convertor signal frequency is equal to the sum or difference of the frequencies of the detector signals and is phase-locked with the signal from which it is derived. The initial phase of the converter signal is synchronised to that of the detector signal by the other detector signal. Both detector signals and the convertor signal are fed to a multiplier. Pref. the convertor signal is derived from the detector signal having the lower frequency. The signal generators and detectors are positioned so that at no-load a zero passage of the detector signal and the centre of the convertor signal pulse coincides at least once within the shortest common period.