| 摘要 |
PURPOSE: To output only the correct position information by neglecting the detected position when the detected position of a moving body has no rationality from the judgment on the position, speed, acceleration, and direction of the moving body detected immediately before. CONSTITUTION: An inductive radio line 14 is installed along the travel track of a moving body 12. The line 14 is constituted of multiple pairs of crossing lines, and transmitters with different frequencies are connected to them to feed position signals. The moving body 12 has position detecting antennas 16, 16', the antennas 16, 16' receive position signals from the pairs of the lines 14, the position signal is frequency-selected by a BPF 18, the position of the position signal is judged by a detecting circuit 20 and a phase judging circuit 22, and the absolute address is detected by a coding circuit 24 and an address detecting circuit 26. A rationality judging block 28 judges the detected position based on the speed, acceleration, and direction of the moving body 12 detected immediately before. When the detected position sharply differs from the previous one, the rationality judging block 28 judges the detected position as an error and does not output it. The reliability of detection is improved, and an adverse effect on a control apparatus can be prevented. |
