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:
Nov. 18, 2014
Filed:
Nov. 02, 2012
Shimadzu Corporation, Kyoto-shi, Kyoto, JP;
Fumiaki Otera, Kyoto, JP;
Shimadzu Corporation, Kyoto-shi, JP;
Abstract
A gas analyzer includes: a first signal processing section for synchronously detecting a light detection signal at a frequency being an integral multiple of a modulation frequency fa of a laser light, to detect a harmonic signal intensity Signal(ν) by a harmonic synchronous detection method; a second signal processing section for capturing a light detection signal and cutting off a frequency component not smaller than the frequency fa to detect a light intensity signal I(ν) at a specific light frequency absorbed by a component to be measured in a sample gas; and an operation section. The operation section includes a first operation means for calculating a density c of the component from the harmonic signal intensity Signal(ν) and a reference light intensity signal I(ν) and a second operation means for calculating the density c from the light intensity signal I(ν) and the reference light intensity signal I(ν).