Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Yuuji Kakuya0
Masanori Kawaura0
Norio Sanma0
Toshihito Nonaka0
Kyojiro Suzuki0
Date of Patent
February 22, 2011
0Patent Application Number
120097840
Date Filed
January 22, 2008
0Patent 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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