The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 25, 2022
Filed:
Dec. 19, 2017
Applicant:
Industrial Technology Research Institute, Hsinchu, TW;
Inventors:
Chung-Fan Tu, Taipei, TW;
Hau-Wei Wang, New Taipei, TW;
Assignee:
INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE, Hsinchu, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N 27/90 (2021.01); G01N 27/904 (2021.01);
U.S. Cl.
CPC ...
G01N 27/9006 (2013.01); G01N 27/904 (2013.01); G01N 27/9086 (2013.01); G01N 27/9046 (2013.01);
Abstract
A detecting device includes a first coil, a third coil, a second coil, and a fourth coil. The first coil generates a first magnetic field on a to-be-measured object. The third coil generates a third magnetic field under the to-be measured object. The second coil generates a second magnetic field. After the fourth coil receives the second magnetic field, a voltage is induced. The induced voltage is amplified by an amplify circuit to drive the third coil. The directions of the currents generated by the first coil and the third coil, respectively, are the same.