Fast bichromatic pyrometer for use with an optical fiber
US5755510A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 20, 1995 |
| Grant date | May 26, 1998 |
| Priority date | — |
| Expiry date | Oct 20, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J5/602
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention relates to a fast bichromatic pyrometer for measuring the temperature T of a gas or of a moving surface, the pyrometer comprising: a measurement probe placed facing the surface or immersed in the gas and picking up thermal radiation that is characteristic of the temperature of said surface or of said gas; a single optical fiber connected to the measurement probe and transmitting said radiation; an optical block connected to the optical fiber and receiving said radiation, the optical block including inlet collimation means for transmitting all of said radiation, separation means formed by a dichroic slide for separating the transmitted radiation into two distinct spectral bands, and outlet focusing means for concentrating the two separated bands of radiation; a quantum detection circuit receiving said separated bands of radiation and converting them into two color voltages Vr, Vb; and a treatment circuit receiving the voltage signals and including analog-to-digital conversion means, a digital signal processor for calculating the ratio Vr/Vb from these digital values, and memory means provided with a table of predetermined values of T=f(Vr/Vb) as obtained by cal…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.