[19a-B303-1~10] 1.6 Ultrasonics

[19a-B303-4] Gas analysis method by using leaky attenuation measurement of surface acoustic waves

〇Kazushi Yamanaka¹, Nobuo Takeda¹, Shingo Akao¹, Toshihiro Tsuji¹, Toru Oizumi¹, Hideyuki Fukushi¹, Tatsuhiro Okano¹, Nagisa Sato¹, Yusuku Tsukahara¹ (1.Ball Wave Inc.)

Keywords:surface acoustic wave, leaky attenuation, background gass

In oil & gas industry, trace moisture sensors in natural gas are used, but variation of composition of background gases degrades the precision of the sensors.To solve these problems, we developed a gas analysis method using the different frequency dependence of attenuation due to moisture and leaky attenuation. We propose a principle and made an experiment on air, nitrogen, argon and methane backgroung gasses. As a result, variation of background gasses was succcessfully evaluated, independently from moisture variarion. Thus, we confirmed feasibility of the proposed method.