US 12,345,631 B2
Gas detection device and gas detection method
Yasutomo Shiomi, Koza Kanagawa (JP); Shinji Saito, Yokohama Kanagawa (JP); Rei Hashimoto, Tokyo (JP); Kei Kaneko, Yokohama Kanagawa (JP); and Tsutomu Kakuno, Fujisawa Kanagawa (JP)
Assigned to Kabushiki Kaisha Toshiba, Tokyo (JP)
Filed by KABUSHIKI KAISHA TOSHIBA, Tokyo (JP)
Filed on Feb. 14, 2023, as Appl. No. 18/168,764.
Claims priority of application No. 2022-043455 (JP), filed on Mar. 18, 2022.
Prior Publication US 2023/0296503 A1, Sep. 21, 2023
Int. Cl. G01N 21/3504 (2014.01)
CPC G01N 21/3504 (2013.01) [G01N 2201/06113 (2013.01); G01N 2201/0636 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A gas detection device, comprising:
a first irradiation part configured to irradiate a first light on a gas released into a space, the first light having a first wavelength;
a second irradiation part configured to irradiate a second light on the gas, the second light having a second wavelength that is less than the first wavelength, the second irradiation part including at least one light-emitting part and a filter forming a dot pattern, the second light irradiated from the light-emitting part being irradiated on the gas via the filter forming the dot pattern, an unevenness being provided in a surface of the filter forming the dot pattern;
an irradiation position adjustment part configured to control an irradiation position of the first light on the gas;
a gas analysis part configured to analyze a component of the gas based on the first light having passed through the gas; and
a gas visualization part configured to visualize a concentration distribution of the gas based on the second light having passed through the gas,
the irradiation position adjustment part controlling the irradiation position of the first light on the gas based on the visualized concentration distribution of the gas.