GAS CONCENTRATION MEASUREMENT DEVICE
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United States of America
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Issued Date -
Jan 9, 2025
app pub date -
Oct 31, 2022
filing date -
Oct 31, 2022
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Abstract
A gas concentration measurement device comprises: a transmission unit which transmits ultrasonic waves to a concentration measurement space; a reception unit which receives the ultrasonic waves propagated through the concentration measurement space and outputs a reception signal; and a concentration measurement unit which determines the spatial propagation time during which the ultrasonic waves propagate through the concentration measurement space and determines the concentration of the gas on the basis of the spatial propagation time. The concentration measurement unit determines the degree of approximation between a reception signal and a time shift signal to which time shift process has been applied, determines the time difference of pulses of neighboring reception signals on the time axis on the basis of the degree of approximation to the minimum shift time in the time shift process, and determines the spatial propagation time on the basis of this time difference.
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