| 摘要 |
The invention relates to an arrangement for the torque measurement of rotating machine parts with a strain measuring bridge ( 2 ) arranged on the rotor, which bridge consists of circuit-connected strain gages. The output signals of the strain measuring bridge ( 2 ) are amplified with an amplifier circuit ( 3 ) and are converted into frequency-proportional signals in a subsequent or downstream voltage-frequency converter ( 4 ). The invention is characterized in that the voltage-frequency converter is embodied as a so-called synchronous voltage-frequency converter ( 4 ), which is fed with a quartz-controlled frequency. For the suppression of the so-called frequency jitter, a follow-up synchronization circuit (PLL) ( 6 ) is provided after the synchronous voltage-frequency converter ( 4 ), which circuit suppresses the alternating frequency of the synchronous voltage-frequency converter ( 4 ), so that a frequency signal that is proportional to the analog strain measurement signal is produced at the output. These frequency-modulated measurement signals on the rotor side ( 14 are inductively transmitted via a transmitter circuit ( 9 ) onto a stator, on which an evaluating circuit is provided, which again produces analog signals or corresponding digital signals from the frequency-modulated measurement signals.
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