초록 ▼

An angular position sensor comprising a generator coil driven by an oscillator to provide an alternating magnetic field which is symmetrical about an axis, an annular rotor of electrically-conductive or magnetic material such that it distorts the magnetic field around it and arranged so that it is a

An angular position sensor comprising a generator coil driven by an oscillator to provide an alternating magnetic field which is symmetrical about an axis, an annular rotor of electrically-conductive or magnetic material such that it distorts the magnetic field around it and arranged so that it is asymmetrical about its axis of rotation and lies outside the equatorial plane of the magnetic field and two sensing coils disposed within the magnetic field. As the rotor 16 rotates about its axis the emfs induced in the sensing coils vary in dependence upon the angular position of the rotor relative to the axis of the undistorted magnetic field.

대표청구항 ▼

An angular position sensor comprising: receiver means for receiving an electromagnetic signal; signal means coupled to said receiver means for generating two output signals each of which represents the vector component of said electromagnetic signal in one of two intersecting inclined directions; me

An angular position sensor comprising: receiver means for receiving an electromagnetic signal; signal means coupled to said receiver means for generating two output signals each of which represents the vector component of said electromagnetic signal in one of two intersecting inclined directions; means for generating an alternating magnetic field; said means for generating including two coils whose central axes are inclined to one another at the same angle as said inclined directions; a body rotatable about an axis perpendicular to the plane defined by said intersecting inclined directions; said body being asymmetrical about its axis of rotation; at least a portion of said body lying outside said plane and being of material such that it distorts said magnetic field; and a sensing coil disposed within said magnetic field; whereby the emf induced in said sensing coil is dependent on the position of said body relative to said magnetic field and, hence, on the direction from which said electromagnetic signal approaches said receiving means.