CAJ | 학술논문

根据热式气体流量计的基本原理,混合气体的组分改变会导致流量计输出信号的变化,造成较大的测量误差.热式流量计需要重新送回厂家用专用设备进行重新标定.该问题严重影响了热式流量计的推广应用.基于换热方程分析以及经验公式,本文提出了一种新的组分补偿方法.该方法可分为两部分:离线的组分补偿和在线的流量计算.复杂的组分补偿计算可以通过主机上的补偿软件离线完成.流量计微计算机可以利用离线补偿结果完成在线的流量计算.实验结果验证了该组分补偿方法的有效性.
근거열식기체류량계적기본원리,혼합기체적조분개변회도치류량계수출신호적변화,조성교대적측량오차.열식류량계수요중신송회엄가용전용설비진행중신표정.해문제엄중영향료열식류량계적추엄응용.기우환열방정분석이급경험공식,본문제출료일충신적조분보상방법.해방법가분위량부분:리선적조분보상화재선적류량계산.복잡적조분보상계산가이통과주궤상적보상연건리선완성.류량계미계산궤가이이용리선보상결과완성재선적류량계산.실험결과험증료해조분보상방법적유효성.
According to the principle of thermal mass flowmeter (TMF), component variations of gas mixture change the output of TMF and bring a large error. TMF should be sent back to the manufacturer to be re-calibrated using special calibration device. This problem has seriously affected the popularization and application of TMF. Based on the analysis of heat transfer equation and empirical equations, a new component compensation method for TMF is proposed in this paper. This method can be divided into two parts: offline component compensation and online flow calculation. Using the proposed compensation software on a host computer, the complex component compensation is accomplished offline. Then the online flow calculation is accomplished on a flow microcomputer using the result in the first step. Field experiment result validates the effectiveness of this new component compensation method.