Speed and torque sensors

Details Speed and torque sensors Speed and torque sensors

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G01P 3/48 (2006.01) G01D 11/24 (2006.01) G01L 3/10 (2006.01) G01P 1/00 (2006.01) G01P 1/02 (2006.01)

Patent

CA 1319835

ABSTRACT OF THE DISCLOSURE Known speed and torque sensors have a permanent magnet and a pole piece about which are wound together a torque coil ant one or more speed coils identical with the torque coil. The coils and permanent magnet assembly are contained in an outer housing. In the present invention a resistor with a resistance approximately fifty times that of the speed coil is connected in series with the or each respective speed coil so that shorting of the speed coil output beyond the resistor does not substantially increase current drawn by the coil. A temperature sensor in the housing enables compensation for changes in temperature on modulus of elasticity of the member subject to torque.

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