CAJ | 학술논문

采用计算机模拟与实验相结合的方式，建立了基于虚拟仪器平台的互相关测量系统。系统采用LabVIEW函数选板中信号运算部分提供的互相关和自相关函数模块，设计了使用函数互相关、极性互相关和差动自相关3种算法实现互相关流速测量的程序。使用随机信号对上述3种算法进行验证，并对计算结果进行比较，验证结果表明互相关和差动自相关算法较为理想。
채용계산궤모의여실험상결합적방식，건립료기우허의의기평태적호상관측량계통。계통채용LabVIEW함수선판중신호운산부분제공적호상관화자상관함수모괴，설계료사용함수호상관、겁성호상관화차동자상관3충산법실현호상관류속측량적정서。사용수궤신호대상술3충산법진행험증，병대계산결과진행비교，험증결과표명호상관화차동자상관산법교위이상。
This design combined computer simulation to experiment research, and established a cross-correlation measurement system based on the virtual instrument PXI platform through the research of the composition, working principle and mathematical models of the cross-correlation measurement system for two-phase flow. Based on the cross-correlation function module and auto-correlation function module provided by the LabVIEW signal computing section, two-phase flow measurement systems were designed respectively using cross-correlation function, polar cross-correlation function and differential autocorrela-tion function. The calculation results were compared through simulations to verify the accuracy of the sys-tems.