Strain gauge based sensor with improved linearity
US6568276B1 · kind B1 · utility
12Cited by
3References
38Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 4, 2000 |
| Grant date | May 27, 2003 |
| Priority date | — |
| Expiry date | Aug 4, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L23/18
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A strain gauge based sensor for use in relatively high pressure applications has a diaphram frame with an active diaphragm portion having a high t/D ratio, or t2/A ratio, and an annular groove provided in at least a portion of a periphery of the diaphram frame which alters the strain field on the surface of the active diaphram, causing the radial stresses to be primarily bending stresses and minimizing shear stresses, thus bringing the &egr;t/&egr;c ratio closer to one and increasing the linearity of the output of strain gauges affixed to the top of the diaphram.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.