一种新型超声波测距系统信号处理方法

发布时间：2018-05-15 02:04

本文选题：超声波测距算法 + 嵌入式系统　；参考：《电子技术应用》2016年08期

【摘要】：一种新型的适用于工程应用的超声波接收端数字信号处理方案,算法思路是以巴特沃斯IIR数字滤波器作为输入输出端,并结合一种新型的包络检波及下采样处理,文中归结为五步算法。详细介绍了各步算法的实现方法、工作原理以及必要性,并结合五步算法的特性给出了一种新型的计算回波渡越时间的点迹法,避开了软件延时与实时性需求之间的矛盾。综合仿真与实验测试说明,此设计方案不仅可以有效滤除信道噪声的干扰,而且可以准确提取包络信息并记录峰值到达时间,极大地满足了超声波测距系统的稳定性和实时性的需求。
[Abstract]:A new digital signal processing scheme for ultrasonic receiver, which is suitable for engineering applications, is proposed. The idea of the algorithm is to take the Butterworth IIR digital filter as the input and output terminal, and to combine a new kind of envelope detection and downsampling processing. This paper comes down to a five-step algorithm. The realization method, working principle and necessity of each step algorithm are introduced in detail, and a new point trace method for calculating echo transit time is given in combination with the characteristic of five-step algorithm, which avoids the contradiction between software delay and real-time requirement. The simulation and experimental results show that the proposed scheme can not only effectively filter the interference of channel noise, but also extract the envelope information accurately and record the peak arrival time. It can meet the need of stability and real-time of ultrasonic ranging system.
【作者单位】：合肥工业大学电子科学与应用物理学院安徽省MEMS工程技术研究中心;合肥科盛微电子科技有限公司;
【基金】：国家863计划项目(2013AA041101)
【分类号】：TB559

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