INSTRUMENT FOR MEASURING STEERING TORQUE OF AUTOMOBILE

Japanese Patent JPS63188731

A

PURPOSE:To detect steering torque by fixing an exciting coil for the magnetic body of an upper column shaft and a magnetic coupling detecting coil for the magnetic body of a lower column shaft to a housing and detecting variation of the magnetic coupling. CONSTITUTION:Rotary torque is transmitted to the upper column shaft 20, and the rotary torque transmitted between the shaft 20 and lower column shaft 21 and the torsion quantity of a torsion bar 22 become the relative displacement between the shafts 20 and 21 and then become the relative displacement between magnetic bodies 24 and 26 fixed to the both. Then a coil 30 is supplied with a constant oscillation output from an oscillator 32 and generates invariably constant magnetic flux, so part of it penetrates the magnetic bodies 24 and 26. The quantity of the magnetic flux penetrating the magnetic body 26 corresponds to the quantity of mutual magnetic coupling between the magnetic bodies 24 and 25. Consequently, electromotive force generated by the coil 31 which consists of the magnetic body 26 as its core also corresponds to the quantity of magnetic coupling between the magnetic bodies 24 and 26. This electromotive force is inputted to a detecting circuit 33 and converted into variation in DC potential and temperature characteristics, etc., are corrected to output a potential corresponding to the input torque.

MATSUOKA HIROSHI

JP2222387A

August 04, 1988

February 02, 1987

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KOYO SEIKO CO

G01L3/10; B62D5/06; G01L5/22; (IPC1-7): B62D5/06; G01L3/10; G01L5/22

JPS39396Y1

Sadao Ito

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