流速仪检定系统中数据处理方法的研究

摘要

This paper exports a current meter calibration equation from the rotor current meter verification principle. The accuracy and error of data collected by velocity meter are discussed. In view of the lower accuracy of the current meter calibration system data acquisition at the low speed and high speed section, by comparing all kinds of fitting methods, it uses the least squares method for data processing. Finally, it writes a LabVIEW data acquisition software program. And a set of experimental data are fitted to prove the correctness and the feasibility by using segmented current meter identification least squares fit curve.%从转子流速仪检定原理入手导出流速仪的检定公式,对流速仪采集数据的精度及其误差问题进行讨论.由于观测结果均是一些离散点,存在误差,针对流速仪检定系统数据采集低速段和中高速段精确度低的问题,通过比较各种拟合方法,采用最小二乘法对数据进行处理.通过LabVIEW软件编写一个数据采集的程序,并对一组流速仪检定的实验数据进行拟合,证明采用分段最小二乘法拟合流速仪鉴定曲线的正确性和可行性.