| 摘要 |
PURPOSE:To detect moving body's own position precisely and continuously by adopting a high-frequency magnetic field as a medium connecting a moving body with a route of movement and by always putting the moving body and the route of movement in a connected state by this medium. CONSTITUTION:By a high-frequency current If transmitted from a transmission device 2 positioned at one end of an induction circuit 1ab, coupled loop groups 11g, 12g and 13g in the induction circuit are always made to generate high-frequency magnetic fields of the same frequency with that of the current If. Three reception antennas 3u, 3v and 3w on a moving body are provided at an interval of P/3 (P: a prescribed period) in the direction of a route of movement, and therefore the positional relations with the coupled loop groups 11g, 12g and 13g are also shifted by P/3 from each other. Induction voltages induced in these three reception antennas respectively are amplified and inputted to envelope detecting circuits 4u, 4v and 4w, and outputs therefrom are converted into digital values by A/D converters 5u, 5v and 5w and then inputted to a microcomputer 7 through an input interface 6 as basic data for detecting the moving body's own position. The information is outputted through an output interface 8. |
