|本期目录/Table of Contents|

[1]刘 波,李理光,刘 庆,等.基于最小二乘法的脉冲流量计仪表系数的非线性修正[J].工业仪表与自动化装置,2015,(01):3-5.
　LIU Bo,LI Liguang,LIU Qing,et al.Based on the least square method of pulse flowmeter instrument coefficient of non-linear correction[J].Industrial Instrumentation & Automation,2015,(01):3-5.
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基于最小二乘法的脉冲流量计仪表系数的非线性修正(PDF)

《工业仪表与自动化装置》[ISSN:1000-0682/CN:61-1121/TH]

卷:
期数:
2015年01期
页码:
3-5
栏目:
出版日期:
2015-02-15

文章信息/Info

Title:
Based on the least square method of pulse flowmeter instrument coefficient of non-linear correction
文章编号:
20140125
作者:
刘 波1; 2; 李理光1; 刘 庆3; 贾 蕊1
（1.同济大学 汽车学院，上海 200092；2.上海禾未新能源科技有限公司 ，上海 200433；3.布克哈德压缩机（上海）有限公司，上海 201201）
Author(s):
LIU Bo1; 2;  LI Liguang1;  LIU Qing3;  JIA Rui2
(1.School of Automotive Studies, Tongji University, Shanghai 200092, China; 2.Shanghai Heweitec New Energy Co., Ltd., Shanghai 200433, China; 3.Burckhardt Compression (Shanghai) Co., Ltd.,Shanghai 201201, China）
关键词:
最小二乘法; 仪表系数; LabWindows/CVI; DDE; 嵌入式系统
Keywords:
least squares method;  instrument coefficient;  LabWindows/CVI;  DDE; embedded system
分类号:
TH814
DOI:
-
文献标志码:
A
摘要:
脉冲流量计输出的频率信号能够在较宽范围内保持良好的重复性，但其仪表系数只能在较窄的范围内保持恒定，从而制约了其测量精度。该设计提出以最小二乘法实现对脉冲流量计仪表系数的非线性修正，该方法基于LabWindows/CVI来完成算法实现和流量修正软件的开发设计。最小二乘法的求解采用基于正交多项式集的构造途径，以相关系数对其拟合结果进行效果评价。频率测量采用嵌入式设备研华PCI-1710数据采集卡采集脉冲信号，并使用脉冲计数方式，解决了测量误差在总流量中的累积问题。软件为第三方软件提供了DDE通信的设备接口，实现了数据传输的标准化。该设计通过嵌入式控制手段模拟运行系统实现对流量的模拟测量，用测量所得数据生成的模型与标准模型相比较，结果表明该方法不仅提高了流量计的计量精度，而且展宽了其量程范围。
Abstract:
Pulse flowmeter output frequency signal can keep good repeatability in a wider scope, but the instrument coefficient can maintain a constant within a narrow range, thereby restricting its measuring accuracy. This design is on the least squares method to implement the algorithm, which is about non-linear modifying ofpulse flowmeter instrument coefficient, also implement the algorithm and that the software development and design based on LabWindows/CVI.It brings forward the way of pulse countinguses embedded system Advantech PCI-1710 data acquisition card in flow measurement, to solve the problem that measurement error cumulates in the total flow. This Software provides a DDE communications equipment interfaces for third-party software, and achieves the standardization of data transmission. The design through embedded system simulation systems, accomplishes the function of simulation to flow measurement. After compare the model generated by the measured data with the standard model, it turns out that not only the measuring accuracy of flowmeter has been improved, but also the measuring range has been broadened.

参考文献/References:

[1] 张涛.气体涡轮流量计的精度分析[J].煤气与热力,2001, 21(3):229-232.[2] 杨金生,唐怀璞.大口径低速插入式切向涡轮流量计的研制[C].天津电子仪表质量品种效益学术会议论文集,1991.[3] 梁国伟.脉冲型流量传感器仪表系数准确性研究[J].计量技术,1998(11):26-28.[4] 徐士良.数值分析与算法[M].北京:机械工业出版社,2007: 271-273.[5] 石东洋.数值计算方法[M].郑州:郑州大学出版社,2007:50-52.[6] 王建新,杨世凤,隋美丽.LabWindows/CVI测试技术及工程应用[M].北京:化学工业出版社,2006.[7] AdvantecheAutomationCorp. AdvantechDevice Driver Manual[Z]. 2003.[8] 孟祥适,姜印平,刘玉杰,等.基于天然气压缩系数Z提高天然气计量准确度的方法[J].测控技术,2004,23(6):16-18.[9] JJG 198—1994.速度式流量计检定规程[S].

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备注/Memo

备注/Memo:
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更新日期/Last Update: 2015-02-15