Gas measuring device and gas measuring method

Patent metadata

Field	Value
Publication number	US-2023408400-A1
Application number	US-202318197947-A
Country	US
Kind code	A1
Filing date	May 16, 2023
Priority date	Jun 15, 2022
Publication date	Dec 21, 2023
Grant date	—

Abstract

A gas measuring device includes a gas chamber into which a sample gas containing a target gas is introduced, a gas detection unit configured to detect the target gas contained in the sample gas introduced into the gas chamber, an irradiation unit configured to apply polarized light to the sample gas introduced into the gas chamber using a polarizer, an optical rotation measurement unit configured to measure optical rotation between the polarized light applied from the irradiation unit to the sample gas and the polarized light that has been transmitted through the sample gas using an analyzer, and an output unit configured to output information on the target gas detected by the gas detection unit and information on the optical rotation of the polarized light detected by the optical rotation measurement unit in association with each other.

First claim

What is claimed is:

1 . A gas measuring device comprising:
a gas chamber into which a sample gas containing a target gas is introduced; a gas detection unit configured to detect the target gas contained in the sample gas introduced into the gas chamber; an irradiation unit configured to apply polarized light to the sample gas introduced into the gas chamber using a polarizer; an optical rotation measurement unit configured to measure optical rotation between the polarized light applied from the irradiation unit to the sample gas and the polarized light that has been transmitted through the sample gas using an analyzer; and an output unit configured to output information on the target gas detected by the gas detection unit and information on the optical rotation of the polarized light detected by the optical rotation measurement unit in association with each other.

2 . The gas measuring device according to claim 1 , wherein
the optical rotation measurement unit and the gas detection unit are configured by one semiconductor sensor, and the one semiconductor sensor is configured to respond to both light and gas.

3 . The gas measuring device according to claim 1 , comprising an optical splitting unit configured to optically split the polarized light applied from the irradiation unit to the sample gas into a plurality of polarized lights, wherein
the optical rotation measurement unit measures optical rotation between the polarized light applied from the irradiation unit to the sample gas and each of the plurality of polarized lights that have been optically split by the optical splitting unit and transmitted through the sample gas.

4 . The gas measuring device according to claim 1 further comprising:
a gas introduction part configured to form a gas flow of the sample gas in the gas chamber; and
an airflow control unit having a plurality of openings through which the sample gas passes, wherein
the gas detection unit configured to detect the target gas contained in the sample gas that has passed through the openings of the airflow control unit.

5 . The gas measuring device according to claim 4 , wherein
the airflow control unit optically configured to split the polarized light that has been transmitted through the sample gas into a plurality of polarized lights, and the optical rotation measurement unit configured to measure optical rotation between the polarized light applied from the irradiation unit to the sample gas and each of the plurality of polarized lights that have been optically split by the airflow control unit.

6 . A gas measuring method comprising:
an introduction step of introducing a sample gas containing a target gas into a gas chamber; a gas detection step of detecting the target gas contained in the sample gas introduced into the gas chamber; an irradiation step of applying polarized light to the sample gas introduced into the gas chamber; a light detection step of measuring optical rotation between the polarized light applied to the sample gas and the polarized light that has been transmitted through the sample gas; and an output step of outputting information on the target gas detected in the gas detection step and information on the optical rotation of the polarized light detected in the light detection step in association with each other.

Assignees

• Sintokogio Ltd
• National Univ Corporation Toyohashi Univ Of Technology

Inventors

• Mizutani Manase
• Noda Toshihiko
• Sawada Kazuaki

Classifications

• G01N21/21 Primary

  Polarisation-affecting properties (G01N21/19 takes precedence) · CPC title

• G01N21/31

  Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry {(G01N21/72 takes precedence)} · CPC title

• G01N21/05

  Flow-through cuvettes (G01N21/09 takes precedence; handling fluid samples G01N1/10) · CPC title