Measuring and testing – Dynamometers – Responsive to torque
Patent
1989-03-31
1991-02-05
Ruehl, Charles A.
Measuring and testing
Dynamometers
Responsive to torque
7386217, 73DIG10, G01L 316, G01L 322
Patent
active
049894587
ABSTRACT:
An apparatus for detecting a torque quantity of an oscillation-type electric dynamometer which comprises a vibration detector installed on a torque arm extended from an oscillator of the dynamometer for detecting the vibration of the torque arm in the direction in which the torque arm applies a force to a load cell, a DC signal elimination circuit for eliminating signal components whose frequencies are in the proximity to a DC signal from the output signal of the vibration detector, a coefficient setting/adding circuit for deriving and setting a vibration torque of the oscillator from the output signal of the DC signal elimination circuit, and an adder for adding the output signal of the coefficient adding/setting circuit to the torque detection signal derived via the load cell to provide a torque detection output. Therefore, an output variation of the vibration detector due to the change in temperature of the vibration detector is eliminated by the DC signal elimination circuit.
REFERENCES:
patent: 3092994 (1963-06-01), Moller
patent: 4457182 (1984-07-01), McFarland
patent: 4478090 (1984-10-01), McFarland
Kabushiki Kaisha Meidensha
Ruehl Charles A.
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