| 摘要 |
PCT No. PCT/JP91/01595 Sec. 371 Date May 19, 1994 Sec. 102(e) Date May 19, 1994 PCT Filed Nov. 20, 1991 PCT Pub. No. WO93/09858 PCT Pub. Date May 27, 1993A sensor of the invention has a plurality of transmission lines (22) being energized for generating a magnetic field, a board for supporting the transmission lines (22), a plurality of reception lines (26) being electro-magnetically coupled with the transmission lines (22) for detecting a magnetic flux change made by the approach of the metal object, and a board for supporting the reception lines (26). The transmission lines (22) and the reception lines (26) are made of conductive thin films formed on their respective boards having sending and returning paths. The transmission lines (22) and the reception lines (26) are laid out in a direction to cross each other with the boards between. |
