一种新型超声波测距系统信号处理方法
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。...
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| Published in | 电子技术应用 Vol. 42; no. 8; pp. 84 - 86 |
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| Main Author | |
| Format | Journal Article |
| Language | Chinese |
| Published |
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,安徽合肥230009%合肥科盛微电子科技有限公司,安徽合肥,230000
2016
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| Subjects | |
| Online Access | Get full text |
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| Summary: | 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。 |
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| Bibliography: | ultrasonic ranging algorithm; embedded system; IIR digital filter; envelope detection A new scheme of digital signal processing in ultrasonic receiver which is suitable for engineering application was came up with. This scheme, summarized as a five- step algorithm, utilizes Butterworth IIR digital filter as the input and output side of this system and combines a new envelope detection and sampling process. The implementation methods, working principle and ne-cessity of each step are introduced in detail. Combining the characteristic of five- step algorithm, a new algorithm of tracing by ev-ery vertex to calculate the echo transit time is given and the algorithm can avoid the contradiction between software delay and time-liness requirements. The comprehensive simulations and experimental measurements show the scheme in this paper can effectively filter out the interference of channel noise, accurately extract the envelope information and record peak arrival time. It is immensely meet the needs of real- time per |
| ISSN: | 0258-7998 |
| DOI: | 10.16157/j.issn.0258-7998.2016.08.020 |