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:
Dec. 22, 2009
Filed:
Jun. 10, 2005
Jens Moeller Jensen, Horsens, DK;
Mohamed Yahia Benslimane, Nordborg, DK;
Jens Moeller Jensen, Horsens, DK;
Mohamed Yahia Benslimane, Nordborg, DK;
Danfoss A/S, Nordborg, DK;
Abstract
An IR sensor (), especially a COsensor, is described, having a filter arrangement (), downstream of which there is arranged a detector arrangement (), and an evaluating device () which is connected to the detector arrangement (), the filter arrangement () having a first filter () and a second filter (), which are configured as bandpass filters and each have a passband and of which the first filter () allows passage of a predetermined IR band and the second filter () does not, and the detector arrangement having two detectors (), each of which is associated with a filter (). The objective is to simplify the use of such an IR sensor. For that purpose, the passband of one filter () is arranged within the passband of the other filter () and the evaluating device () forms the difference of the signals (S, S) of the detectors () and normalises it to the signal (S) of a detector ().