| 摘要 |
PURPOSE:To detect a position along the moving direction of a moving body precisely by mounting coils to be electromagnetically coupled with an encoded going line or returning line on the moving body. CONSTITUTION:The going and returning lines are wired along the moving direction of the moving body, the one-end parts of the going and returning lines are connected to an AC power supply, the other end parts of the going and returning lines are mutually connected, and at least one of the going and returning lines is formed zigzag. Detecting coils L1-L3 and L4-L6 are fitted to the surface of the moving body 3 to detect an encoded code and its code width (section). The address numbers of the 100th and 1,000th digits are detected by a differential voltage E3 between the induced voltages e4, e5 of the detecting coils L4, L5 and movement from address '1' to the succeeding address can be detected by the induced voltage E4 of the detecting coil L6. The pairs of coils L1, L2 and L4, L5 are fitted to the surface of the moving body 3 with a fixed width (m) respectively.
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