尿素机中高频微弯型科氏质量流量计信号处理  

Signal Processing of High Frequency Microbend Coriolis Mass Flowmeter for Urea Filling Machine

作　　者：刘陈慈 徐科军[1] 黄雅 LIU Chen-ci;XU Ke-jun;HUANG Ya(School of Electrical and Automation Engineering,Hefei University of Technology,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

出　　处：《计量学报》2022年第6期767-776,共10页Acta Metrologica Sinica

摘　　要：为了将微弯型高频传感器的科氏质量流量计应用于尿素加注机,根据在企业现场采集到的流量信号数据,建立科氏质量流量传感器加注过程的信号模型。根据此模型分析已有的数字信号处理算法产生误差的原因,并从兼顾实时性与准确性两方面出发对算法进行改进,以适用于尿素机测量的需要。在研制的基于DSP的科氏质量流量变送器上,实时实现算法,并进行水流量标定实验和尿素加注机标定实验,其测量误差小于0.1%,重复性误差小于0.05%。In order to apply the Coriolis mass flowmeter with micro-bending and high frequency sensor to the urea machine,the signal model of the Coriolis mass flow sensor's filling process is established according to the flow signal data collected in the field of the enterprise.Based on the above model,the error causes of the existing digital signal processing algorithms are analyzed,and the algorithm is improved from the perspective of dynamic response speed,so as to meet the needs of urea machine measurement.The real-time algorithm is realized on the Coriolis mass flow transmitter based on DSP,and the water flow calibration experiment and filling machine calibration are carried out.The measurement error is less than 0.1%and the repeatability error is less than 0.05%.

关 键 词：计量学 科氏质量流量计 信号模型 尿素加注机 动态响应速度 

分 类 号：TB937[一般工业技术—计量学]