| 提高超声波测距精度方法的研究 |
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| 引用本文： | 张珂,刘钢海.提高超声波测距精度方法的研究[J].现代电子技术,2007,30(15):139-141. |
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| 作者姓名： | 张珂 刘钢海 |
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| 作者单位： | 中国计量学院,浙江,杭州,310018 |
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| 摘 要： | 在分析超声波测距系统回波信号处理存在问题的基础上,提出了两种提高测量精度的回波信号处理方法。采用时间增益补偿技术,补偿超声波在空气中的衰减,减少回波信号的起伏;由有源全波整流电路和微分电路等组成峰值时间检测电路,可正确检测回波的峰值到达时间。两种方法的采用,提高了超声波测距系统的测量精度。
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| 关 键 词： | 超声波测距 回波信号处理 时间增益补偿 峰值时间检测 |
| 文章编号： | 1004-373X（2007）15-139-03 |
| 收稿时间： | 2007-02-26 |
| 修稿时间： | 2007-02-26 |
Research on a Method of Imploving Ultrasonic Ranging Precision |
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| ZHANG Ke,LIU Ganghai.Research on a Method of Imploving Ultrasonic Ranging Precision[J].Modern Electronic Technique,2007,30(15):139-141. |
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| Authors: | ZHANG Ke LIU Ganghai |
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| Affiliation: | China Jiliang University, Hangzhou,310018,china |
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| Abstract: | For problems exist when processing echo signal of ultrasonic distance measuring system,two new ways of echo signal processing to improve measure precision are proposed.Using the time-gain compensation technique to compensate for ultrasonic wave's weaking when transmitting in the air,and reduce the fluctuation of echo signal.The peak time detecting circuit which is composed of full-wave rectification circuit and differential circuit can detect the reach time of echo signal accurately.Using these two methods,the precision of ultrasonic distance measuring system has been improved. |
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| Keywords: | ultrasonic distance measuring echo signal processing time-gain compensation peak time detecting |
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