适用于频繁启停流量测量的科氏质量流量计信号处理方法

doi:10.3969/j.issn.1000-1158.2014.03.10

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摘要针对实际应用中流量频繁启停的特点,建立科氏质量流量传感器突变信号模型。用此模型对已有的数字信号处理算法进行评估,分析其在罐装测量中的误差；改进DTFT算法,以适用于突变信号的处理。在研制的基于DSP的科氏质量流量变送器上,实时实现了整套算法,并进行了启停法及静态质量法的水标定实验。实验结果表明,所研究的方法具有较快的动态响应速度和较高的测量精度。

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	刘翠
	徐科军
	侯其立
	熊文军
	方敏

关键词 ：计量学, 科氏质量流量计, 突变信号模型, DTFT算法

Abstract：According to the characteristic of the frequent starting and stopping flow, a mutation-signal mode of Coriolis mass sensor is proposed to describe the change patterns of signal parameters with the sudden change of flow. The exiting DTFT algorithm with negative frequency contribution is evaluated using this model, and its errors are analyzed in the batch applications. On the basis of these studies, this algorithm is improved to apply to processing of the mutation signal. The algorithm is implemented in real time in a DSP-based digital Coriolis mass flow transmitter developed, and water flow calibrations consisting of starting-stopping flow method and steady-flow method are performed for the transmitter. The experimental results show that the method has both fast dynamic response and highed measurement accuracy.

Key words： Metrology Coriolis mass flowmeter Mutant signal model DTFT algorithm

基金资助:中航工业产学研合作创新工程(CXY2011HFGD23)

通讯作者: 徐科军为通信作者

作者简介: 刘翠（1987-）,女,河北衡水人,合肥工业大学在读研究生,主要从事自动化仪表和数字信号处理技术研究。liucui1934@126.com

引用本文:

刘翠, 徐科军,侯其立, 熊文军, 方敏. 适用于频繁启停流量测量的科氏质量流量计信号处理方法[J]. 计量学报, 2014, 35(3): 242-247.
LIU Cui, XU Ke-jun,HOU Qi-li, XIONG Wen-jun, FANG Min. Signal Processing Methods of Coriolis Mass Flowmeter for Measurement of the Frequent Starting and Stopping Flow. Acta Metrologica Sinica, 2014, 35(3): 242-247.

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http://jlxb.china-csm.org:81/Jwk_jlxb/CN/10.3969/j.issn.1000-1158.2014.03.10 或 http://jlxb.china-csm.org:81/Jwk_jlxb/CN/Y2014/V35/I3/242

［1］ Henry M P, Clarke D W, Vignos J H. Digital flowmeter. U S, 2002/0038186 A1［P］.2002-05-28.
［2］ Henry M P, Clarke D W, Archer N, et al . A self-validating digital Coriolis mass-flow meter: an overview［J］. Control Engineering Practice ,2000,8:487-506.
［3］徐科军,张瀚.一种科氏流量计的数字信号处理与驱动方法研究［J］.计量学报,2004,25 (4):339-343,379.
［4］徐科军,倪伟.一种科里奥利质量流量计的信号处理方法［J］. 计量学报,2001,21(4):254-258.
［5］郑德智,樊尚春,邢维巍.科氏质量流量计相位差检测新方法［J］.仪器仪表学报,2005,26(5):441-443.
［6］徐科军,徐文福.基于AFF和SGA的科氏质量流量计信号处理方法［J］.计量学报,2007,28(1):48-51.
［7］徐科军,倪伟,陈智渊.基于时变信号模型和格型陷波器的科氏流量计信号处理方法［J］.仪器仪表学报,2006,27(6):596-601.
［8］朱志海,徐科军,杨双龙,等.面向时变信号模型的科氏质量流量传感器信号处理方法的实现与测试［J］.计量学报,2010,31(4):325-329.
［9］张海涛,涂亚庆.计及负频率影响的科里奥利质量流量计信号处理方法［J］.仪器仪表学报,2007,28(3):539-544.
［10］李叶,徐科军,朱志海,等.面向时变的科里奥利质量流量计信号处理的方法研究与实现［J］.仪器仪表学报,2010,31(1):8-14.
［11］侯其立,徐科军,李叶,等.基于TMS320F28335的高精度科氏质量流量变送器研制［J］.仪器仪表学报,2010,31(12):2788-2795.
［12］ Cheesewright R, Clark C, Belhadj A, et al . The dynamic response of Coriolis mass flow meters［J］. Journal of Fluids and Structures, 2003, 18:165-178.
［13］ Henry M P, Clark b C, Duta M, et al . Response of a Coriolis mass flow meter to step changes in flow rate［J］. Flow Measurement and Instrumentation, 2003, 14:109-118.
［14］ Clark C, Cheesewright R. Experimental determination of the dynamic response of Coriolis mass flow meters［J］. Flow Measurement and Instrumentation, 2006, 17: 39-47.
［15］ Jacobsen E, Lyons R. The sliding DFT［J］. IEEE Signal Processing Magazine, 2003,20（3）:74-80.