Patent ID: 6467329
Filing Date: 2002-10-22
Classification: G01L

Abstract:
A neutral point voltage adjuster of a torque sensor which comprises: a pair of coils having inductances changing mutually in a reverse direction in accordance with a torque; and a differential amplifier means inputting first and second sub-voltages based on each inductance change of both coils, and amplifying a difference between the first and second sub-voltages so as to output it as a main voltage, and which uses a neutral point where no torque is inputted as a boundary between right and left directions, and detects each torsional torque in the right and left direction, comprising:a neutral point voltage setting means for displacing the main voltage of the output from the differential amplifier means on the basis of an adjusting signal so as to set a neutral point voltage; a storing means for storing a neutral point voltage setting state by the neutral point voltage setting means; and a neutral point voltage adjusting means for storing a neutral point voltage used as a reference of the main voltage, and inputting the main voltage, and further, outputting the adjusting signal to the neutral point voltage setting means so that a difference between the neutral point voltage read from the main voltage and the reference neutral point voltage is reduced.