Alumina encapsulated strain gage, not mechanically attached to the substrate, used to temperature compensate an active high temperature gage in a half-bridge configuration
US6301775A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 17, 1998 |
| Grant date | Oct 16, 2001 |
| Priority date | — |
| Expiry date | Dec 17, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/1142
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A temperature compensation element for a high-temperature strain gage and the method of fabricating the same. Preferably, the element is a "dummy" strain gage not mechanically attached to the substrate. The element is encapsulated in an insulative material and used to compensate an active high-temperature strain gage and wired in a half-bridge configuration. The temperature compensation element and high-temperature strain gage are fabricated using the method of the present invention. This method includes temporarily adhering the element to a heat sink, encapsulated in an insulative material and then removed from the heat sink. Next, the element is either stacked or placed near the active gage. Ideally, the element and the active gage have substantially similar heat transfer and electrical properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.