Pressure sensor using a pressure responsive magnetic film to vary inductance of a coil
US5355714A · kind A · utility
35Cited by
3References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 25, 1993 |
| Grant date | Oct 18, 1994 |
| Priority date | — |
| Expiry date | Feb 25, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60C23/0408
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A pressure sensor includes a diaphragm having a magnetic film fixed to one side thereof. The diaphragm is arranged to displace depending on a pressure differential applied thereacross to change an inductance of a coil which is arranged close to the magnetic film with a predetermined gap therebetween. An alternating current is supplied to the coil to be modulated by the inductance of the coil so that the pressure differential across the diaphragm is converted into an electric signal. A monitored pressure is derived based on this converted electric signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.