Temperature compensating device for torque measuring apparatus

Details Temperature compensating device for torque measuring apparatus Temperature compensating device for torque measuring apparatus

1992-07-27

1994-05-03

Chilcot, Jr., Richard E.

Measuring and testing

Dynamometers

Responsive to torque

73862331, G01L 310

Patent

active

053076907

ABSTRACT:
A temperature compensating device for a torque measuring apparatus of the magneto-strictive type. A torque transmission shaft has a magnetically anisotropic portion formed on the periphery of the shaft. A sensing coil is disposed around the torque transmission shaft in corresponding relation to the magnetically anisotropic portion. A DC voltage from a constant voltage generator is supplied to the sensing coil. A torque detection signal is derived from the AC component of the voltage developed across the sensing coil, and the DC resistance of the sensing coil is detected from the DC component of the voltage, whereby the temperature of the sensing coil is detected. The torque detection characteristics of the apparatus is temperature-compensated on the basis of the temperature detection signal.

REFERENCES:
patent: 4972726 (1990-11-01), Yoshimura et al.
patent: 4989460 (1991-02-01), Mizuno et al.

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