Torque meter means

Details Torque meter means Torque meter means

G - Physics

01

L

73/68

G01L 3/00 (2006.01) G01L 3/10 (2006.01)

Patent

CA 1094346

TORQUE METER MEANS ABSTRACT A torque meter which measures the torque of a rotating shaft includes at least two sensors. Portions of each sensor are fixed to the shaft. The sensors provide shaft pulse signals at the same frequency but having a phase difference corresponding to the torque experienced by the shaft. A clock provides clock pulses. A circuit connected to the sensors and to the clock provides first groups of pulses in accordance with the shaft pulse signals so that the number of pulses in each group of the first group of pulses corresponds to the torque experienced by the shaft at a constant speed. A first counting network counts the pulses from the circuit. Another circuit connected to the clock provides second groups of pulses and is responsive to the speed of shaft rotation so that a ratio of a group of pulses from the first group of pulses to a corresponding group of pulses from the second group of pulses averages out errors due to the shaft rotation and the sensors. A second counting network counts the pulses from the second pulse means. Both counting networks are reset every revolution of the shaft. An output circuit provides an output corresponding to the torque experienced by the shaft in accordance with the ratio of the counts in accounding networks. I

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