Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Yuuji Kakuya1
Masanori Kawaura1
Norio Sanma1
Toshihito Nonaka1
Kyojiro Suzuki1
Date of Patent
February 22, 2011
1Patent Application Number
120097841
Date Filed
January 22, 2008
1Patent Primary Examiner
Patent abstract
An electromagnetic impedance sensor detects an object made of conducting material or soft magnetic material with contact-free. The sensor includes: a detection coil; and a detection circuit for supplying electricity to the coil and for measuring electromagnetic impedance change in the coil. The detection coil includes multiple coil portions provided by one wire. One coil portion has a side adjacent to a corresponding side of another coil portion. The side and the corresponding side extend along with a direction, and the side has a current flowing direction, which is the same as the corresponding side.
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