Biomagnetism measuring device, biomagnetism measuring system, and biomagnetism measuring method
US10058258B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Aug 30, 2011 |
| Grant date | Aug 28, 2018 |
| Priority date | — |
| Expiry date | Oct 9, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10D48/40
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A biomagnetism measuring device includes a magnetic sensor and a support unit. The magnetic sensor includes a tunnel magneto-resistive element including a fixed magnetic layer, a free magnetic layer and an insulating layer. The insulating layer is disposed between the fixed magnetic layer and the free magnetic layer, and has resistance being changed by a tunnel effect depending on an angle difference between a direction of magnetization of the fixed magnetic layer and a direction of magnetization of the free magnetic layer. The support unit supports the magnetic sensor in such a way that the tunnel magneto-resistive element faces a living body. The magnetic sensor outputs an output signal in accordance with a resistance value of the insulating layer, the resistance value being changed by magnetism emitted from the living body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.