Gas measuring device and gas measuring system

Patent metadata

Field	Value
Publication number	US-12492967-B2
Application number	US-202318129302-A
Country	US
Kind code	B2
Filing date	Mar 31, 2023
Priority date	Apr 5, 2022
Publication date	Dec 9, 2025
Grant date	Dec 9, 2025

Abstract

A gas measuring device includes: a gas rectification unit configured to rectify gas to control traveling directions and traveling speeds of gas molecules based on molecular weights of the gas molecules; and a gas sensor configured to absorb the gas molecules of the gas rectified by the gas rectification unit, and to detect absorption positions and absorption amounts.

First claim

What is claimed is:

1 . A gas measuring device comprising:
a plate-like filter including a principal surface on which a plurality of slits parallel to one another are formed, the principal surface being parallel to a flow direction of gas, and an extending direction of each of the plurality of slits being orthogonal to the flow direction of the gas, and configured to control traveling directions and traveling speeds of gas molecules based on molecular weights of the gas molecules by causing the gas molecules to pass, based on gravity, through slits corresponding to their respective molecular weights; and a gas sensor configured to absorb the gas molecules of the gas, which have been rectified by the filter so that the gas molecules have reached different positions based on the molecular weights of the gas molecules, and to detect absorption positions and absorption amounts of the gas molecules, wherein components of the gas are specified based on the absorption positions and the absorption amounts of the gas molecules.

2 . The gas measuring device according to claim 1 , wherein the filter is made of silicon or aluminum.

3 . The gas measuring device according to claim 1 , wherein the gas sensor includes a sensitive film configured to absorb the gas molecules, and an output unit configured to output the absorption positions and the absorption amounts of the gas molecules absorbed by the sensitive film.

4 . The gas measuring device according to claim 2 , wherein the gas sensor includes a sensitive film configured to absorb the gas molecules, and an output unit configured to output the absorption positions and the absorption amounts of the gas molecules absorbed by the sensitive film.

5 . A gas measuring system comprising:
a chamber configured to allow gas to flow therethrough; and a gas measuring device disposed inside the chamber and configured to measure the gas flowing inside the chamber, wherein the gas measuring device includes a plate-like filter including a principal surface on which a plurality of slits parallel to one another are formed, the principal surface being parallel to a flow direction of the gas, and an extending direction of each of the plurality of slits being orthogonal to the flow direction of the gas, and configured to control traveling directions and traveling speeds of gas molecules based on molecular weights of the gas molecules by causing the gas molecules to pass, based on gravity, through slits corresponding to their respective molecular weights, and a gas sensor configured to absorb the gas molecules of the gas, which have been rectified by the filter so that the gas molecules have reached different positions based on the molecular weights of the gas molecules, and to detect absorption positions and absorption amounts of the gas molecules, and wherein components of the gas are specified based on the absorption positions and the absorption amounts of the gas molecules.

6 . The gas measuring system according to claim 5 , wherein an ionization apparatus configured to ionize the gas molecules is provided on an upstream of the chamber.

7 . The gas measuring device according to claim 1 , wherein the gas rectification unit is configured to rectify gas to be measured containing a predetermined gas molecule, and is made of a material having affinity to the predetermined gas molecule.

8 . The gas measuring system according to claim 5 , wherein the gas rectification unit is configured to rectify gas to be measured containing a predetermined gas molecule, and is made of a material having affinity to the predetermined gas molecule.

Assignees

• Sintokogio Ltd
• National Univ Corporation Toyohashi Univ Of Technology

Inventors

• Mizutani Manase
• Suzuki Yoshihisa
• Noda Toshihiko
• Sawada Kazuaki

Classifications

• G01N2001/227

  separating gas from solid, e.g. filter · CPC title

• G01N27/62

  by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode · CPC title

• G01N1/2247

  Sampling from a flowing stream of gas · CPC title

• G01N1/2205

  with filters · CPC title

• G01N30/88

  Integrated analysis systems specially adapted therefor, not covered by a single one of the groups G01N30/04 - G01N30/86 · CPC title