Sensor with a plurality of transmission and reception lines for detecting a position of a metal object
First Claim
1. A sensor for detecting a position of a metal object comprising a plurality of transmission lines being energized for generating a magnetic field, a board for supporting said transmission lines, a plurality of reception lines being electro-magnetically coupled with said transmission lines for detecting a magnetic flux change made by an approach of the metal object, and a board for supporting said reception lines,wherein said transmission lines and said reception lines are made of conductive thin films formed on their respective boards, each transmission and reception line having sending and returning paths, the sending path being coupled to and substantially in parallel with the returning path, said transmission lines and said reception lines being spaced apart by said boards and being laid out in a direction to cross each other.
1 Assignment
0 Petitions
Accused Products
Abstract
A 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.
22 Citations
10 Claims
-
1. A sensor for detecting a position of a metal object comprising a plurality of transmission lines being energized for generating a magnetic field, a board for supporting said transmission lines, a plurality of reception lines being electro-magnetically coupled with said transmission lines for detecting a magnetic flux change made by an approach of the metal object, and a board for supporting said reception lines,
wherein said transmission lines and said reception lines are made of conductive thin films formed on their respective boards, each transmission and reception line having sending and returning paths, the sending path being coupled to and substantially in parallel with the returning path, said transmission lines and said reception lines being spaced apart by said boards and being laid out in a direction to cross each other.
Specification