| 摘要 |
The mass flow of gas can be calculated using ultrasound sensors, by the following steps: Obtaining the time of flight signals for the upstream and downstream, Measuring the gas pressure in the flow, Calculating the instantaneous volumetric flow and sound velocity for the gas and Calculating the mass flow from a relationship between the actual volumetric flow, the actual sound velocity, the actual pressure and a constant ?<SUB>0</SUB>. |
