摘要
介绍了一种以LPC2134单片机为核心,综合了可变增益和温度补偿的超声波测距系统,并在ARM硬件平台上采用最小均方时延估计(Least-Mean-Square Time Delay Estimate,以下简称LMSTDE)算法对采集到的回波进行数字信号处理,以提高超声波测距系统的精度和适应性。给出了这种测距系统的硬件原理电路和主要的软件设计思路,实验表明该系统具有较高的分辨率。
A kind of ultrasonic distance detection system based on LPC2134 synthesizes variable gain and temperature compensation. The Least- Mean- Square is introduced, which Time Delay Estimate （LMSTDE） algorithm is implemented on ARM hardware platform to deal with the ultrasonic echo wave signal, in order to improve the accuracy and flexibility. The hardware principle circuit and software design idea are showen. The result shows that the ultrasonic distance detection system has a high resolution.
出处
《微处理机》
2009年第2期103-106,共4页
Microprocessors
基金
国家自然科学基金(60475037
10477013)
教育部高等学校博士点基金(20060248057)
关键词
超声波
测距
可变增益
温度补偿
Ultrasonic wave
Distance detection
Variable gain
Temperature compensation
