The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 26, 1998
Filed:
Oct. 20, 1995
Daniel Hernandez, Odeillo, FR;
Gabriel Olalde, Odeillo, FR;
Emmanuel Milcent, Odeillo Cedex, FR;
Michel Clement, Vernon, FR;
Societe Europeenne de Propulsionm, Suresnes, FR;
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 calibration and delivering at its output, on the basis of the calculated ratio, the temperature T of the surface or of the gas.