Strain measuring apparatus
US5423224A · kind A · utility
11Cited by
9References
12Claims
0Family size
Inventor
Key dates
| Filing date | Jan 10, 1994 |
| Grant date | Jun 13, 1995 |
| Priority date | — |
| Expiry date | Jan 10, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B7/16
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A clamp-on structural strain-gage sensor that is mounted to dynamic load-bearing structures, such as sucker-rod type oil well pumps, to produce an electrical output proportional to the deflection of such structures. The apparatus uniquely includes an active electronic temperature correcting circuit to provide compensation for the erratic effects caused by uneven thermal heating of the load-bearing structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.