| 摘要 |
A circuit arrangement for measuring torque, rotary oscillations and performance, in which signal emitters and receivers are arranged on at least one rotating shaft. From one of the frequencies f (f1 or f2) of the signals (S1 or S2) of the signal receivers a new signal (S3) is produced, the frequency of which (f3) corresponds to the integrated or differential frequency of the frequencies (f1, f2) and which is locked in phase with the signal (S1 or S2) from which it is obtained. The coordination of the initial phase of the new signal (S3) with the frequency-producing signal (S1 or S2) is determined by the other signal (S2 or S1). The signals (S1, S2) and the new signal (S3) are fed into a multiplier. The measurement for the torsion-induced distortion of the signal emitters in relation to one another, from which the torque signal can be derived on the basis of the rigidity characteristic of the machine elements which are rotated, is determined from integration of the signal supplied by the multiplier (S1.S2.S3) over one or several of the smallest common periods of the frequencies (f1, f2, f3), or by suitable filtering. |
