基于包络拟合法的FPGA超声测距系统设计

针对普通超声测距系统精度低、速度慢的问题，提出了一种全硬件实现的FPGA超声测距系统。将最小二乘法的二次曲线拟合算法应用于超声回波包络拟合，完成回波信号的数字信号处理和距离的测量。采用硬件描述语言在Altera公司的EP2C70F896C6上实现，在4m范围内测距误差小于±1mm。该系统具有精度高、运算速度快的特点，并具备很强的功能扩展性，可扩展到超声探伤、袒声成像等领域。...

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Bibliographic Details
Published in电子技术应用 Vol. 38; no. 7; pp. 14 - 16
Main Author 张祥 杨飞鹏 黄宝莹 黄启俊 常胜
Format Journal Article
LanguageChinese
Published 武汉大学物理科学与技术学院电子科学与技术系,湖北武汉,430072 2012
Subjects
FPGA
包络拟合
数字信号处理
超声测距
包络拟合
FPGA
超声测距
数字信号处理
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ISSN0258-7998
DOI10.3969/j.issn.0258-7998.2012.07.007

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Summary:针对普通超声测距系统精度低、速度慢的问题，提出了一种全硬件实现的FPGA超声测距系统。将最小二乘法的二次曲线拟合算法应用于超声回波包络拟合，完成回波信号的数字信号处理和距离的测量。采用硬件描述语言在Altera公司的EP2C70F896C6上实现，在4m范围内测距误差小于±1mm。该系统具有精度高、运算速度快的特点，并具备很强的功能扩展性，可扩展到超声探伤、袒声成像等领域。
Bibliography:ultrasonic ranging ; envelope fitting ; digital signal processing ; FPGA
Aiming at the problem of poor precision and low speed in the application of ordinary ultrasonic ranging, we put for- ward a full hardware realization of FPGA-based ultrasonic ranging system. The system realizes ultrasonic echo envelope fitting by least squares method of quadratic curve fitting algorithm, which can calculate the distance through the process of echo signal. The digital circuit is described by Verilog HDL, and the system is implemented on Ahera＇s EP2C？0F896C6. The measurement error is less than 1 mm in range of 4 meters. System＇s measure precision is high and operation speed is fast. System can be extended on the field of ultrasonic flaw detection and uhrasonic imaging, etc.
Zhang Xiang, Yang Feipeng, Huang Baoying, Huang Qijun, Chang Sheng （Department of Electronics Science and Technology, School of Physics and Technology, Wuhan University,Wuhan 430072, China）
11-2305/TN
ISSN:0258-7998
DOI:10.3969/j.issn.0258-7998.2012.07.007