Apparatus with function of detecting location of metal body

A - Human Necessities – 63 – F

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A63F 7/02 (2006.01) G07F 17/32 (2006.01) A63F 3/02 (2006.01)

Patent

CA 2068516

The present invention consists of an apparatus comprising a signal sending line which has a folded-back shape, and which serves to send a current for generating a magnetic field; and a signal receiving line which has a folded-back shape, which is arranged at a position permitting it to be electromagnetically coupled with the signal sending line, and which serves to detect a magnetic flux change caused by the approach of metal. The plurality of signal sending lines are arranged coplanarly, while the plurality of signal receiving lines are arranged coplanarly. The signal sending lines and the signal receiving lines are arranged with their planes held in parallel and in directions intersecting to each other, thereby constructing a sensing matrix. The sensing matrix is arranged in opposition to a panel along which a metal body to be detected moves, while holding therebetween a space which is, at least, large enough to pass the metal body. Signal sending means and signal receiving means are connected to the sensing matrix so as to detect the location the metal body.

La présente invention est constituée par un appareil comportant une ligne de transmission de signaux repliée utilisée pour transmettre un courant générateur d'un champ magnétique, et d'une ligne de réception de signaux repliée qui est installée à un endroit tel qu'elle est couplée électromagnétiquement avec la ligne de transmission de signaux, et qui sert à détecter les variations d'induction magnétique causées par l'approche d'une pièce de métal. Les multiples lignes de transmission de signaux sont en montage coplanaire, ainsi que les multiples lignes de réception de signaux. Les plans des lignes de transmission de signaux et de réception de signaux sont maintenus parallèles, dans des directions perpendiculaires l'un avec l'autre, et forment par conséquent une matrice de détection. Celle-ci est montée en opposition avec un panneau le long duquel le corps métallique à détecter se déplace, la matrice et le panneau étant suffisamment espacés l'un de l'autre pour que le corps métallique puisse passer entre les deux. Des dispositifs de transmission et de réception de signaux sont connectés à la matrice de détection pour localiser le corps métallique.

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