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    • 43. 发明专利
    • EARTH MAGNETISM AZIMUTH SENSOR
    • JPS6215484A
    • 1987-01-23
    • JP15658685
    • 1985-07-15
    • TDK CORP
    • MORI KANEOSHIGETA MASAO
    • G01R33/02G01C17/02G01V3/40
    • PURPOSE:To make the titled sensor light in weight and small in size, to attain the stabilization of an operation and the reduction of a drift, and to detect an azimuth of an earth magnetism, by winding round a pair of coils by holding a prescribed interval, to a wire-shaped high magnetic permeability magnetic core going to the X axis direction and the Y axis direction. CONSTITUTION:Detecting parts 1A, 1B are formed by winding coils 3A, 3B, 4A, and 4B by a necessary number of times to both ends of magnetic cores AF1, AF2 which have used three pieces of zero magnetostrictive amorphous wires being high magnetic permeability magnetic cores of 20-30mm length. By a driving frequency which has been set by processing circuits 2A, 2B, each detecting part 1A, 1B is driven, and a difference of strength of magnetic fields generated in the coil 3A and 3B, and 4A and 4B is detected by each processing circuit. It is fetched as outputs E01, E02 through an active filter ACF, and an analog output and an azimuth are detected.