CAJ | 학술논문

流速测量作为水灾预警的重要组成部分意义重大，但是常规测速仪器精度较差，因此提出了一种极性相关算法进行流速测量。本文概述了相关法在流体流速测量中的基本原理，进行了相关法的算法介绍，在此基础上提出了改进型算法———极性相关算法。此后进行了极性相关法的算法分析，电路实现。根据蒙特卡洛(Monte Carlo)法进行的仿真实验表明，极性相关算法在峰点位置确定上可以代替普通相关算法，而且由于其算法的特殊性，因而具有较好的抗干扰作用。在实验测量速度与蒙特卡洛法设定速度的比较中可以发现，在两采样传感器间距符合一定条件的情况下，测量速度与其相应的拟合曲线拟合度较好，测量速度能精确的反应相应的蒙特卡洛法设定速度，这也从实验上验证了此算法的可行性，可以进行精确的流速测量。
류속측량작위수재예경적중요조성부분의의중대，단시상규측속의기정도교차，인차제출료일충겁성상관산법진행류속측량。본문개술료상관법재류체류속측량중적기본원리，진행료상관법적산법개소，재차기출상제출료개진형산법———겁성상관산법。차후진행료겁성상관법적산법분석，전로실현。근거몽특잡락(Monte Carlo)법진행적방진실험표명，겁성상관산법재봉점위치학정상가이대체보통상관산법，이차유우기산법적특수성，인이구유교호적항간우작용。재실험측량속도여몽특잡락법설정속도적비교중가이발현，재량채양전감기간거부합일정조건적정황하，측량속도여기상응적의합곡선의합도교호，측량속도능정학적반응상응적몽특잡락법설정속도，저야종실험상험증료차산법적가행성，가이진행정학적류속측량。
Flow velocity measurement,as an important part of flood warning,is significant,but the ac-curacy of conventional instrument is poor,therefore,a polarity correlation algorithm is present for flow velocity measurement.This paper summarizes the basic principle of correlation method in the flow veloc-ity measurement,and then advances an improved algorithm of polarity correlation method.Then the al-gorithm analysis and circuit implementation are carried out.The simulation experiments based on the Monte Carlo method show that the polarity correlation algorithm can replace common correlation algo-rithms on peak point determination.It has good anti-interference function due to the particularity of the algorithm.The comparison of experimental measurement speed with the speed setting by the Monte Carlo method shows that if the two sampling sensor spacing meet certain conditions,the measurement speed and its fitted curve could have a better Goodness of Fit,and the measurement speed can accurately response the speed set by the Monte Carlo method.Which can validate the feasibility of the algorithm and have an accurate measurement on flow velocity.