Method and apparatus for improved temperature compensation in a corrosion measurement system
US4217544A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 16, 1978 |
| Grant date | Aug 12, 1980 |
| Priority date | — |
| Expiry date | Oct 16, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N17/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An improved method and apparatus to compensate for temperature variations in an electrical resistance corrosion measuring system. Sacrificial probes are inserted into a corrosive atmosphere at significant points, and corrosion-related losses from these probes are measured by monitoring changes in probe resistance. By comparing these changes to a reference probe, accurate determinations of corrosion are made. A novel method of automatic temperature compensation removes essentially all degrading effects of changes in temperature on the corrosion measurement system, by obtaining a reference signal which varies proportionately with temperature and counteracting instantaneous and extended temperature changes by subtracting the reference signal due to temperature variations from the uncompensated system output signal due to the combined effects of corrosion and temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.