| 摘要 |
<p>The present invention relates to a mass flow measurement program using ultrasonic waves, a mass flow measurement method using the ultrasonic waves, and an ultrasonic wave measurement apparatus using the same comprising: a process where a type, a temperature (T), a pressure (P), and a time difference (Δt) of a fluid of which a mass flow is to be measured; a process where an input constant is selectively inputted in accordance to the type, the temperature, and the pressure of the fluid from an input constant (aρdensity value of the fluid) database in accordance to the type of the fluid which is preset; a process where a flow calibration count (K) is inputted; and a process where the flow calibration count, a frequency, and the density of the fluid are calculated by being assigned to a measurement formula.</p> |
