基于实验数据分析的科氏质量流量计最佳振幅研究  

Research on Optimal Amplitude of Coriolis Mass Flowmeter Based on Experimental Data Analysis

作　　者：黄雅 徐科军[1,3] 刘陈慈 HUANG Ya;XU Kejun;LIU Chenci(School of Electrical and Automation Engineering,Hefei University of Technology,Hefei,Anhui 230009,China;Hefei Geyi Integrated Circuit Co.,Ltd.,Hefei,Anhui 230061,China;Engineering Technology ResearchCenter of Industrial Automation,Anhui Province,Hefei,Anhui 230009,China)

机构地区：[1]合肥工业大学电气与自动化工程学院,安徽合肥230009 [2]合肥格易集成电路有限公司,安徽合肥230061 [3]工业自动化安徽省工程技术研究中心,安徽合肥230009

出　　处：《计量学报》2024年第7期1015-1023,共9页Acta Metrologica Sinica

摘　　要：针对科氏质量流量计难以确定最佳振幅,无法达到最佳测量效果的问题,采用研制的变送器匹配性能优良的一次仪表进行试验,采集不同振幅下的信号,从振幅稳定度、波形畸变、信号功率谱、信噪比和系统驱动效率等角度分析振幅对科氏质量流量计性能的影响;再进行不同振幅下的水流量标定实验,根据示值误差和重复性确定最佳振幅。结果表明,随着振幅的增大,波形畸变愈加严重、高次谐波分量也随之增大、噪声信号功率也呈现增大趋势,从而影响信噪比,使驱动效率降低;但是,振幅过小会加剧传感器放大信号幅值波动,影响测量结果。因此,针对该款流量计的最佳振幅约为439 mV。In response to the difficulty in determining the optimal amplitude and achieving the best measurement effect of the Coriolis mass flowmeter,the test was carried out by matching the developed transmitter with the primary instrument with excellent performance.The signals were collected under different amplitudes to analyze the impact of amplitude on the performance of the Coriolis mass flowmeter from the perspectives of amplitude stability,waveform distortion,signal power spectrum,signal-to-noise ratio,and system driving efficiency.The water flow calibration experiments were conducted with different amplitudes to determine the optimal amplitude based on indication error and repeatability.The results show that as the amplitude increases,waveform distortion becomes more severe,higher harmonic components also increase,and the noise signal power also shows an increasing trend,thereby affecting the signal-to-noise ratio and reducing the driving efficiency.However,if the amplitude is too small,it will exacerbate the amplitude fluctuation of the amplified signal of the sensor and affect the measurement results.Therefore,the optimal amplitude for this flowmeter is approximately 439 mV.

关 键 词：流量计量 科氏质量流量计 最佳振幅 示值误差 重复性 

分 类 号：TB937[一般工业技术—计量学]