Pressure transducer
US3946615A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 9, 1975 |
| Grant date | Mar 30, 1976 |
| Priority date | — |
| Expiry date | Jun 9, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L9/10
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A pressure transducer having a substantially linear output signal with respect to a given phenomenon of interest, which in turn is a non-linear function of a pressure differential. An interior chamber in a housing is divided into compartments by a thin, flexible, magnetically permeable diaphragm. Stationary reactance elements are positioned on opposite sides of the diaphragm at approximate gap distances therefrom (with the diaphragm unflexed) of from 0.25 mm to 4.0 mm for one element and from 0.05 mm to 0.8 mm for the other, the ratio of the gap for one element to the gap for the other element being at least 2:1. The diaphragm flexes when a pressure differential representing the phenomenon of interest is applied across it, and thereby changes the reactive coupling with each of the reactance elements. By an appropriate selection of gap distances within the above stated ranges, a steady state signal applied to the reactance elements will produce an output that varies substantially linearly with respect to variations in the phenomenon of interest. In a particular embodiment the reactance elements each comprise inductance coils having primary and secondary windings, the primary winding…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.