Sensing device, sensing method, and computer-readable storage medium
US8655607B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 27, 2011 |
| Grant date | Feb 18, 2014 |
| Priority date | — |
| Expiry date | May 14, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B13/248
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A sensing device includes: a magnetic field generating coil that generates an alternating magnetic field in a sensing-target region; a signal inducing coil in which is induced an electric signal corresponding to the alternating magnetic field generated by the magnetic field generating coil; an amplifier that amplifies a third electric signal obtained from the difference between a first electric signal induced in the signal inducing coil in a state where a sensing-target magnetic body is present in the sensing-target region and a second electric signal induced in the signal inducing coil in a state where the magnetic body is not present in the sensing-target region; and a sensing unit that senses, on the basis of the third electric signal amplified by the amplifier, the magnetic body passing through the sensing-target region by sensing a change in the magnetic field resulting from magnetization reversal of the magnetic body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.