华南理工大学学报(自然科学版) ›› 2016, Vol. 44 ›› Issue (5): 84-89.doi: 10.3969/j.issn.1000-565X.2016.05.013

• 机械工程 • 上一篇    下一篇

级联自适应陷波器设计及不同步脉冲计数补偿

刘桂雄1万勇2 黄坚1 潘云飞2   

  1. 1. 华南理工大学 机械与汽车工程学院,广东 广州 510640; 2. 广州能源检测研究院,广东 广州 510170
  • 收稿日期:2015-10-08 修回日期:2015-11-11 出版日期:2016-05-25 发布日期:2016-04-12
  • 通信作者: 刘桂雄(1968-),男,教授,博士生导师,主要从事先进传感与仪器研究. E-mail:1094261929@qq.com
  • 作者简介:刘桂雄(1968-),男,教授,博士生导师,主要从事先进传感与仪器研究.
  • 基金资助:
    国家重大科学仪器设备开发专项(2013YQ230575);广州市技监局科技计划项目(2015KJ35)

Design of Cascade-Connection Adaptive Notch Filter and Counting Compensation of Asynchronous Pulse

LIU Gui-xiong1 WAN Yong2 HUANG Jian1 PAN Yun-fei2   

  1. 1.School of Mechanical and Automotive Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China; 2.Guangzhou Institute of Energy Detection,Guangzhou 510170,Guangdong,China
  • Received:2015-10-08 Revised:2015-11-11 Online:2016-05-25 Published:2016-04-12
  • Contact: 刘桂雄(1968-),男,教授,博士生导师,主要从事先进传感与仪器研究. E-mail:1094261929@qq.com
  • About author:刘桂雄(1968-),男,教授,博士生导师,主要从事先进传感与仪器研究.
  • Supported by:
    Supported by the National Important Scientific Instrument Exploring Foundation of China(2013YQ230575)

摘要: 为减小计数误差及实现多路不同步异频脉冲信号的高精度测量,设计了一款可实时估计周期脉冲信号相位的级联自适应陷波器(CANF). 首先在前端固定一自适应因子为 0 的 Liu 型自适应陷波器(LANF),然后将 LANF 的输出作为 Mojiri 型自适应陷波器(MANF)的输入,再利用 MANF 的估计频率实时调整 LANF,最后在流量计标准装置中实现 CANF 的相位实时估计,并对两路不同步脉冲信号进行精度补偿. 仿真实验结果表明CANF 的计数误差小于 ± 0. 047 个脉冲,工程应用实验结果表明 CANF 的计数误差小于±0. 045个脉冲,说明了文中通过实时计算信号相位进行计数补偿的方法能有效提高脉冲计数检定精度和多路并行检定的实用性.

关键词: 陷波器, 级联, 自适应算法, 不同步脉冲, 误差补偿

Abstract: In order to reduce counting error and implement high-accuracy measurement of multi-channel asyn- chronous impulse signals with different frequencies,a cascade-connection adaptive notch filter (CANF) for real- time phase estimation is proposed.In CANF,firstly,an ANF designed by Liu (LANF) with an adaptive factor of 0 is set in the front of ANF,and the output of LANF is used as the input of an ANF designed by Mojiri (MANF). Secondly,the estimated frequency of MANF is used to adjust the frequency of LANF in real time.Then,CANF is applied to a multi-station flowmeter calibration equipment and is used to calculate the real-time phase of two chan- nels of asynchronous impulse signal.Finally,simulation and practical application of CANF are carried out,with the corresponding counting errors being less than ± 0. 047 and ± 0. 045,respectively,which means that the counting error compensation via real-time phase calculation effectively improves the counting accuracy of asyn- chronous pulses and the practicability of multi-channel parallel calibration.

Key words:  notch filters, cascade connections, adaptive algorithms, asynchronous pulse, error compensation

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