Calibration apparatus and method for strain measuring instruments
US4292835A · kind A · utility
10Cited by
3References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 25, 1980 |
| Grant date | Oct 6, 1981 |
| Priority date | — |
| Expiry date | Feb 25, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L25/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A calibration apparatus and method is presented for calibrating an ultrasonic extensometer which is used to determine the average level of stress in a bolt or stud. The calibration apparatus uses linear displacement transducers and force measuring apparatus to accurately determine the stress-strain relationship of a bolt or stud. Simultaneously, readings on an ultrasonic extensometer strain measuring apparatus are monitored, and the ultrasonic extensometer is calibrated in accordance with the linear transducer and force measuring readings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.