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:
Sep. 01, 1992
Filed:
May. 20, 1991
Applicant:
Inventor:
Lars O Millgard, Ostersund, SE;
Assignee:
Affarsverket FFV, Eskilstuna, SE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
374 25 ; 374 16 ; 374178 ;
Abstract
The present invention relates to a method to determine the temperature of one or both surfaces of the two surfaces of a Peltier element. One then calculates the temperature difference (dT) between the surfaces from a known relation for the Seebeck voltage (U.sub.p) as a function of the temperature difference and the mean temperature (T.sub.i) of the element from a known relation for the temperature dependence of the internal resistance (R.sub.i) of the element. Finally, to the mean temperature (T.sub.i) one adds and from it subtracts respectively half the temperature difference (dT) between the surfaces.