Hall generator pressure transducer
US4340877A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 27, 1980 |
| Grant date | Jul 20, 1982 |
| Priority date | — |
| Expiry date | Oct 27, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L9/14
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A corrugated membrane cavity has a flexible membrane, the center of which, in response to changes of pressure, varies of spacing between a magnet, for example carried on the membrane, and a Hall generator integrated circuit, in which the Hall generator is mounted coaxially with the polarity axis of the magnet and the flexible membrane. Another magnet on the other side of the Hall-IC faces the first magnet, so that like poles are facing each other, and so that the Hall-IC operates in a region of the induction field that is symmetrical with respect to the plane of zero induction that exists midway between the magnet. This working range makes possible a relatively high and linear variation of output voltge of the Hall-IC in response to variation of the magnetic induction which is particularly useful for pressure sensors for installation in the air intake duct of a motor vehicle engine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.