US 12,326,429 B2
Gas measurement device and gas measurement method
Yoshihisa Suzuki, Toyokawa (JP); Toshihiko Noda, Toyohashi (JP); and Kazuaki Sawada, Toyohashi (JP)
Assigned to SINTOKOGIO, LTD., Nagoya (JP); and National University Corporation TOYOHASHI UNIVERSITY OF TECHNOLOGY, Toyohashi (JP)
Appl. No. 17/802,269
Filed by SINTOKOGIO, LTD., Nagoya (JP); and National University Corporation TOYOHASHI UNIVERSITY OF TECHNOLOGY, Toyohashi (JP)
PCT Filed Feb. 3, 2021, PCT No. PCT/JP2021/003924
§ 371(c)(1), (2) Date Aug. 25, 2022,
PCT Pub. No. WO2021/176933, PCT Pub. Date Sep. 10, 2021.
Claims priority of application No. 2020-038064 (JP), filed on Mar. 5, 2020.
Prior Publication US 2023/0079310 A1, Mar. 16, 2023
Int. Cl. G01N 27/00 (2006.01); G01N 33/00 (2006.01)
CPC G01N 33/0013 (2013.01) [G01N 33/0073 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A gas measurement device comprising:
a base member having an opening at its upper portion and formed of a gas-impermeable material;
a filter disposed so as to close the opening and formed of a gas-permeable material;
a gas chamber defined by the base member and the filter;
a gas sensor disposed in the gas chamber;
a catalyst member connected to a power source applying voltage or current, performing a reaction of a first gas and a second gas contained in a mixed gas contacted with the catalyst member to generate a third gas, and exhibiting a catalytic action in which the reaction changes in response to temperature;
a signal generation unit configured to output a synchronous signal for determining timing;
a control unit configured to control the power source based on a control signal for determining temperature of the catalyst member and the synchronous signal so that the temperature of the catalyst member becomes a temperature determined by the control signal at the timing determined by the synchronous signal;
an acquirement unit configured to acquire a detection value of the gas sensor at the timing determined by the synchronous signal; and
an output unit configured to output the detection value and the control signal in association with each other, wherein
the filter has the catalyst, and
the gas sensor is configured to detect gas molecules contacted with the catalyst member, and
the control unit is configured to output the control signal having a waveform corresponding to the temperature of the catalyst member when the rectangular wave of the synchronous signal is received a predetermined first number of times, and
the acquirement unit is configured to acquire the detection value when the rectangular wave of the synchronous signal is received a predetermined second number of times.