| 基于混沌脉冲位置调制的实时超声测距系统串扰抑制 |
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| 引用本文： | 孟庆浩,兰少莹,姚振静,李根旺.基于混沌脉冲位置调制的实时超声测距系统串扰抑制[J].电子学报,2008,36(11):2268-2273. |
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| 作者姓名： | 孟庆浩 兰少莹 姚振静 李根旺 |
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| 作者单位： | 天津大学电气与自动化工程学院,天津市过程检测与控制重点实验室,天津,300072 |
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| 基金项目： | 国家自然科学基金
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教育部新世纪优秀人才支持计划
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| 摘 要： | 超声测距系统中各换能器之间存在的干扰(即串扰)会严重制约测距的准确性;为消除串扰,采用混沌脉冲位置调制构造每个超声换能器的短发射序列;相关分析法被用于识别回声序列.分析了超声串扰产生原因,并给出了脉冲占空比与各次谐波能量的对应关系.为获得最佳的相关效果,采用遗传算法对Logistic混沌满映射调制的短序列脉冲间隔做了优化.所提方法在DC-DC(直流－直流)激励的静电型超声测距系统中获得了验证.结果表明,在合理配置脉冲间隔的情况下,混沌脉冲位置调制可用于消除实时超声测距系统的串扰.
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| 关 键 词： | 超声换能器 超声串扰 混沌脉冲位置调制 相关分析 |
| 收稿时间： | 2007-11-08 |
Rejecting Crosstalk of Real-Time Ultrasonic Ranging System Based on Chaotic Pulse Position Modulation |
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| MENG Qing-hao,LAN Shao-ying,YAO Zhen-jing,LI Gen-wang.Rejecting Crosstalk of Real-Time Ultrasonic Ranging System Based on Chaotic Pulse Position Modulation[J].Acta Electronica Sinica,2008,36(11):2268-2273. |
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| Authors: | MENG Qing-hao LAN Shao-ying YAO Zhen-jing LI Gen-wang |
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| Affiliation: | MENG Qing-hao,LAN Shao-ying,YAO Zhen-jing,LI Gen-wang (Tianjin Key Laboratory of Process Measurement , Control,School of Electrical Engineering , Automation,Tianjin University,Tianjin 300072,China) |
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| Abstract: | The crosstalk between transducers can seriously restrict the accuracy of ultrasonic ranging system.To eliminate ultrasonic crosstalk,the Chaotic Pulse Position Modulation(CPPM)is used to construct the short triggering sequence for each ultrasonic transducer.The correlation analysis is applied to identify the echo sequence.The crosstalk sources are analyzed.The relation between pulse's duty cycle and energy of harmonic components are deduced.To obtain the optimal correlation performance,the genetic algorithm... |
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| Keywords: | ultrasonic transducer ultrasonic crosstalk chaotic pulse position modulation correlation analysis |
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