基于TIADC的宽量程高精度流速测量
PDF下载 (265)叶忠辉,汪鹏君 *,蒋志迪,王 康.基于TIADC的宽量程高精度流速测量[J].宁波大学学报(理工版),2016,29(4):44-49.DOI:
YE Zhong-hui,WANG Peng-jun *,JIANG Zhi-di,WANG Kang.TIADC-based Current Measurement with Wide Range and High Accuracy[J].Journal of Ningbo University(Natural Science & Engineering Edition),2016,29(4):44-49.DOI:
| Title: | TIADC-based Current Measurement with Wide Range and High Accuracy |
| 作者: | 叶忠辉, 汪鹏君 *, 蒋志迪, 王 康 |
| Author(s): | YE Zhong-hui, WANG Peng-jun *, JIANG Zhi-di, WANG Kang |
| 关键词: | 宽带复相关; 时间交替采样; 宽量程; 抗干扰 |
| Keywords: | broad-band complex correlation; time-interleaved ADC; wide range; anti-interference |
| 分类号: | TP274 |
| 文献标识码: | A |
| 摘要: | 通过对声学多普勒测速理论的研究, 结合时间交替采样(Time-interleaved Analog to Digital Converter, TIADC)结构, 提出了一种无模糊并行复相关的测流方法. 该方法首先对回波信号进行TIADC采样, 并利用互谱插值估计回波信号的时延, 粗测流速; 然后结合TIADC多通道特性, 采用并行复相关估计频偏量; 再以时延测量流速作为修正依据, 实现流速无模糊测量; 最后进行实验验证. 结果证明该方法不仅测速正确、测流量程大, 而且精度高、抗干扰能力强. |
| Abstract: | In this paper, combined with time-interleaved analog to digital converter acquisition structure, a current measurement method without ambiguous boundary is proposed based on parallel broad-band complex correlation by studying the complex correlation algorithm and Acoustic Doppler current measuring theory. Firstly, TIADC is adopted to increase the sampling rate. Cross-spectral is used to estimate the time-delay of echo signal and to measure flow velocity roughly. Secondly, parallel complex correlation is applied to estimate frequency offset with TIADC characteristics. Further, the rough velocity is introduced to solve velocity ambiguity. Finally, the testing results show that the method can not only achieve correct flow velocity measurement of wide range, but also improve calculation precision with strong anti-interference performance. |
| 参考文献 /References: | [1] 马海涛, 彭东立, 王华亮, 等. 宽带多普勒技术中模糊速度处理方法改进[J]. 声学学报, 2011, 36(2):226-230. [2] 张维全, 王小宁, 彭东立. 宽带声学多普勒流速剖面仪作用距离估计[J]. 声学技术, 2010, 29(4):442-446. [3] MAKARATAT K, BROWN T W C, STAVROU S, et al. Complex correlation on linear array angle-of-arrival estimation measurement of ultra wideband propagation channels[J]. The Institution of Engineering and Technology, 2010, 4(9):1354-1369. [4] 蒋为. 一种基于相关系数的频率估计算法[J]. 微波学报, 2012, 28(2):49-52. [5] 韩礼波, 沈斌坚. 宽带多普勒海流计测速方法研究[J]. 声学与电子工程, 2014, 28(2):21-24. [6] 徐世军, 许伟杰. 复相关法测频的硬件实现[J]. 声学技术, 2009, 28(2):180-183. [7] 杨扩军, 田书林. 基于TIADC的20GS/s高速数据采集系统[J]. 仪器仪表学报, 2014, 35(4):841-849. [8] 黄雄飞, 苑秉成, 陈喜. 宽带多普勒声呐信号频谱特性分析[J]. 应用声学, 2009, 28(4):278-282. [9] 马淳燕. 宽带相控多普勒测速技术研究[D]. 哈尔滨: 哈尔滨工程大学, 2009. [10] 石靖鹏, 彭东立, 朱安珏. OMAP平台嵌入式声学多普勒流速剖面仪系统设计与实现[J]. 声学技术, 2014, 33(3):199-203. |
| 备注/Memo: | 收稿日期: 2015－09－18. 宁波大学学报（理工版）网址: http://journallg.nbu.edu.cn/ 基金项目: 国家高技术研究发展计划（863计划）（2012AA091802）; 国家级星火计划项目（2014GA701019）; 浙江省科技计划（2013C31019）. 第一作者: 叶忠辉（1990－）, 男, 江西上饶人, 在读硕士研究生, 主要研究方向: 信号处理和嵌入式设计. E-mail: yolanda_yzh@126.com *通信作者: 汪鹏君（1966－）, 男, 浙江奉化人, 教授, 主要研究方向: 电路设计及理论. E-mail: wangpengjun@nbu.edu.cn 宁波大学学报（理工版）网址：http://journallg.nbu.edu.cn/ |
