中国计量大学学报2023，Vol.34Issue(4)：495-500,562,7.DOI:10.3969/j.issn.2096-2835.2023.04.001
一种高精度的超声波气体计量方法
A high-precision ultrasonic fluid metering method
摘要
Abstract
Aims:This paper aims to improve the measurement accuracy of ultrasonic gas metering in flight time difference.Methods:The flight time difference was roughly calculated using the parabolic interpolation method.The integer estimation was adjusted based on spectral weighting;and the fractional part was adjusted based on the Lagrange delay filter.Results:In the simulation experiment,the designed delay was 50 ns;and the delay calculated by the algorithm was 50.17 ns.The fluctuations were smaller than those of the existing methods under different signal-to-noise ratio conditions.In the flow test experiment,the flow curve was consistent with the theoretical curve;and there was no problem of full-cycle staggered waves.In high and low temperature experiments,fluctuations were in the range of 1 ns.Conclusions:The proposed method effectively avoids the error of full-cycle staggered waves,reduces the theoretical interpolation error to a high-order remainder term,and has the ability to adapt to high-low temperature environments.关键词
超声波气体计量/时差估计/互相关/分数延迟滤波器Key words
ultrasonic gas metering/time difference estimation/cross correlation/fractional delay filter分类
通用工业技术引用本文复制引用
朱炼,彭大江,常关羽..一种高精度的超声波气体计量方法[J].中国计量大学学报,2023,34(4):495-500,562,7.基金项目
四川省重大科技专项项目(No.23ZDYF0252),四川省博士后创新人才支持项目(No.BX202215) （No.23ZDYF0252）
