Measuring and testing – Dynamometers – Responsive to torque
Patent
1985-10-18
1987-12-15
Ruehl, Charles A.
Measuring and testing
Dynamometers
Responsive to torque
7386233, 324209, G01L 310
Patent
active
047124334
ABSTRACT:
A non-contacting, inductively coupled leakage flux torque sensor particularly adapted for automobile power steering systems. The input and output shafts of the system are coupled by a lost motion mechanism. Discontinuities are formed in a ferromagnetic member. The discontinuities may comprise sets of slots or ferromagnetic projections on facing end surfaces of the ferromagnetic member. As a result of torsional stress on the member, the discontinuities change shape and dimension or are displaced, resulting in a change in leakage flux. The change in leakage flux is detected by two differentially connected coils. A modulator-demodulator circuit provides a determination of torque as a function of the changed flux.
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Artamonov et al, "Converter of the Torsion Angle . . . Digital Code", Izmeritelnaya Tekhnika, No. 7, pp. 33-35, Jul. 1978.
Hochstein Peter
Imai Nobuyuki
Aisin Seiki Kabushiki Kaisha
Ruehl Charles A.
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