G - Physics – 01 – B
Patent
G - Physics
01
B
G01B 7/00 (2006.01) A63F 7/02 (2006.01) G01B 7/004 (2006.01) G07F 17/38 (2006.01)
Patent
CA 2118302
40 ABSTRACT A metal body detecting device having a sensing matrix (20) and a signal processing system (170) for driving the sensing matrix. The sensing matrix comprises a plurality of transmission lines (22) and a plurality of reception lines (26) arranged in rows and column respectively, and a wiring board (17) for supporting these lines. Each of the transmission lines and reception lines consists of a pair of lead wires formed of an outward path and a return path being in parallel each other. The pair of lead wires is connected at one end, and are used, at the other end, as an input and an output end of a signal. The wiring board includes a transmission terminal unit (23) and a reception terminal unit (27) and an area on which the transmission lines and the reception lines are wired. The wiring board further includes circumventive wiring (64) for transmission lines for connecting the input/output end of the transmission lines to the transmission terminal unit, and circumventive wiring for reception lines for connecting the input/output end of the reception lines. At least one of the circumventive wiring for transmission and the circumventive wiring for reception, is provided with individual wiring for only one of the input/output end of the outward path and return path of each pair of lead wires, and common wiring is provided for other end.
Handa Shigeru
Kawashima Kazunari
Takemoto Takatoshi
Kabushiki Kaisha Ace Denken
Shapiro Cohen
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