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:
Oct. 24, 2023
Filed:
Jan. 21, 2020
Fujikin Incorporated, Osaka, JP;
Masaaki Nagase, Osaka, JP;
Kazuteru Tanaka, Osaka, JP;
Masahiko Takimoto, Osaka, JP;
Kouji Nishino, Osaka-shi, JP;
Nobukazu Ikeda, Osaka, JP;
FUJIKIN INCORPORATED, Osaka, JP;
Abstract
A Concentration measurement devicecomprises: a measurement cellhaving a flow path through which a gas flows, a light sourcefor generating incident light to the measurement cell, a photodetectorfor detecting light emitted from the measurement cell, a pressure sensorfor detecting a pressure of the gas in the measurement cell, a temperature sensorfor detecting a temperature of the gas in the measurement cell, and an arithmetic circuitfor calculating a concentration of the gas based on an output P of the pressure sensor, an output T of the temperature sensor, an output I of the photodetector, and an extinction coefficient α, wherein the arithmetic circuitis configured to calculate the concentration using the extinction coefficient α determined on the basis of the output of the temperature sensor