NON-CONTACT ROTARY DISPLACEMENT SENSOR FOR OBTAINING LINEAR AND INDEPENDENT OUTPUT SIGNAL

摘要

PURPOSE: A non-contact rotary displacement sensor is provided to prevent the intensity of a magnetic flux transmitted to a hall device from dropping by the leakage of a magnetic field by rounding an edge of a sensing bar. CONSTITUTION: A non-contact rotary displacement sensor is composed of a magnet(18) forming a magnetic field by inducing magnetic flux; a rotor(6) inducing the movement of the magnet; a pair of sensing bars(20,22) positioned around the rotor to measure the magnetic field formed by the magnet and formed with a plurality of apertures(28,30) with same width; a housing holding the rotor in the axial direction; and a signal converter arranged at the aperture between the sensing bars to display the density change of the magnetic field into an electrical signal and formed with a self-amplifier. A pair of sensing bars comprises a first sensing bar having a first body and at least one first end and a second sensing bar having a second body and plural second ends interposing the first end.