| 摘要 |
<p>Method for defining the mixture ratio in a binary gas mixture, based on an accurate measurement of the speed of sound and the temperature. In the said method a wideband sound signal is made to proceed in an acoustic tube filled with the gas under measurement via two paths of differing lengths from one transmitter to one receiver, and the transit time difference (t) corresponding to the length difference (L) of the separate paths is defined as the distance of the side peaks (2, 3) of the autocorrelation function of the received signal from the origin 0. The average molecular weight M^¨B7 of the gas mixture under measurement, as well as the partial densities of the mixture gases, are calculated from the derived formulas.</p> |
