Strain gage calibration
US4426874A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 27, 1982 |
| Grant date | Jan 24, 1984 |
| Priority date | — |
| Expiry date | Apr 27, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L25/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for calibrating transducer type strain gages 10 is disclosed which utilizes a temporary bonding system for accurately predetermining the individual apparent strain curve characteristics of the gages 10 and subsequently employs a computer to match the apparent strain curves of the individual gages 10 to determine which gages 10 should be used together. The temporary bonding system requires a test block 25 on which the gages 10 are temporarily bonded, several thermocouples 15 for monitoring temperature and a data acquisition system for recording apparent strain data. Initially, a group of strain gages 10 are attached to the test block 25 using a bonding agent that disintegrates at high temperatures. The gages 10 are then wired to an appropriate data acquisition system and data collected throughout a predetermined temperature excursion. Once the data is obtained, the test block 25 is heated until the bonding agent disintegrates, freeing the gages 10 from the test block 25. The gages are then disconnected from the data acquisition system and cleaned, thereby ready for use on transducers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.