Patent ID: 6788053
Filing Date: 2004-09-07
Classification: G01D,G01R

Abstract:
A magnetic flux detecting device for measuring the quantity of a magnetic flux in a magnetic path forming part which forms a magnetic path and is provided within a magnetic circuit that is driven by another magnetic flux generating means, the device comprising:magnetically sensitive means made of a conductive magnetic material and constituted by a sensor core provided on the magnetic path forming part and a sensor coil wound on the sensor core; high-frequency electrifying means for electrifying the sensor coil at a high frequency; and a magnetic flux quantity detecting means for detecting an impedance of the sensor coil and detecting the quantity of a magnetic flux in the magnetic path forming part on the basis of the impedance; the sensor core not being magnetically saturated when the sensor coil is electrified at a high frequency by the high-frequency electrifying means; the electrification of the sensor coil and the detection of the impedance of the sensor coil being performed simultaneously in a single sensor coil.