GAS CONCENTRATION MEASUREMENT DEVICE

• Main Authors: SEKI, Takuya, SHINFUKU, Yoshifumi
• Format: Patent
• Language: English; French; German
• Published: 18.09.2024
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

The purpose of the present invention is to simply and accurately measure a gas concentration. This gas concentration measurement device (100) comprises: a concentration measurement space (22); a transmission unit (14) which transmits an ultrasonic wave to the concentration measurement space (22) in response to a transmission signal; a reception unit (16) which receives the ultrasonic wave propagated through the concentration measurement space (22), and outputs a reception signal; and an analysis unit (18). The analysis unit (18) obtains a space propagation time in the concentration space (22) on the basis of a timing at which the transmission signal is input to the transmission unit 14 and a timing at which the reception signal is output from the reception unit 16, and obtains the concentration of a gas to be measured on the basis of the space propagation time. The analysis unit 18 obtains a correction value for a direct wave-type propagation time on the basis of the direct wave-type propagation time and a reflective wave-type propagation time, and obtains a space propagation time on the basis of: the corrected propagation time obtained by correcting the direct wave-type propagation time on the basis of the correction value; or one of the direct wave-type propagation time or a value related thereto in the reflection wave-type propagation time.