Emissivity independent multiwavelength pyrometer
US5132922A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 20, 1991 |
| Grant date | Jul 21, 1992 |
| Priority date | — |
| Expiry date | Mar 20, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J5/802
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus and method for non-contact temperature measurement of an object, using least-squares-based multiwavelength pyrometry techniques. Radiances from an object are detected by a spectrograph/detector apparatus and are converted into electronic signals readable by a computer. The computer then operates on these signals as data to be curve-fit, using least squares analysis, to a predetermined theoretical function for the dependence of the radiance on the wavelength. When the computer has minimized the least-squares difference function, the computer identified a parameter representing the temperature and reports this value to the user, along with a collaterally calculated maximum error in the temperature estimate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.