CAJ | 학술논문

超声波热量表的流量测量单元采用时差法测量原理，在介质温度基本不变的情况下，可以通过将时间差值与实际流量标定系数相乘的方法来计算相对应的流量值。然而当被测介质的温度发生变化时，介质中的声速随之发生变化，流量测量单元所得到的时间差值也会发生变化，理所当然，流量测量单位的体积流量测量值与实际流量值之间也会产生偏差，随着介质温度变化加剧，测量偏差也会加大，直接影响流量测量准确度。
초성파열량표적류량측량단원채용시차법측량원리，재개질온도기본불변적정황하，가이통과장시간차치여실제류량표정계수상승적방법래계산상대응적류량치。연이당피측개질적온도발생변화시，개질중적성속수지발생변화，류량측량단원소득도적시간차치야회발생변화，리소당연，류량측량단위적체적류량측량치여실제류량치지간야회산생편차，수착개질온도변화가극，측량편차야회가대，직접영향류량측량준학도。
Ultrasonic heat meter flow measurement unit adopts the theory of time difference method, the medium temperature is almost the same, can pass the time difference value and the actual flow calibration coefficient multiplication method to calculate the corresponding flow value. However, when the temperature change of measured medium, medium velocity changes, the flow mea-surement unit of time difference value will also change, of course, the flow measurement unit of volume flow between measured val-ue and the actual flow deviation, also can produce as the medium temperature change, deviation measurement is increased, directly affect the accuracy of flow measurement.