Electricity: measuring and testing – Magnetic – Displacement
Patent
1995-06-02
1998-01-27
O'Shea, Sandra L.
Electricity: measuring and testing
Magnetic
Displacement
32420716, 324654, 34087031, 73862331, 318653, 318656, G01B 714
Patent
active
057125635
ABSTRACT:
A displacement detector for enabling a precise detection of a displaced quantity of the core. The displacement detector is provided with a displaceable core, a detecting coil the inductance of which varies in response to a displaced quantity and a reference resistor, wherein a transient response voltage in case of a pulse voltage being applied to the inductance and the reference resistor is detected to enable detection of the absolute value of the inductance and thereby the change in the inductance which corresponds to the displaced quantity is detected independently of the peak value or the frequency of the pulse voltage. The displacement detector is preferably used in a torque sensor for an electric powered steering system, wherein the core of the displacement detector is formed of nonmagnetic metal material, the structure is simple, and a sensitive detection of a displaced quantity of the steering torque is possible.
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Kawagoe Hiroyuki
Ohta Susumu
Ozawa Akira
Yoshida Jun-ichi
Honda Giken Kogyo Kabushiki Kaisha
O'Shea Sandra L.
Patidar Jay M.
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