摘要
数字超声测距是目前主流的超声测距方式,相对传统的方式能获得更高精度。提出一种改进的包络拟合超声测距算法,采用二次曲线拟合的方式对超声回波信号进行分析和寻找回波起振点,并完成了系统的SOPC实现。与目前常用的几种数字超声测距算法对比,测距系统对A/D转换后的回波信号还进行了FIR带通滤波,并通过温度补偿有效提高了精度,具有较大的参考意义和应用扩展性。
Digital ultrasonic ranging is the main way of ultrasonic ranging.Relative to traditional ways,it can get more accurate results.A new algorithm based on envelope fitting is developed to analyze the echo signal and find the echo onset point by quadratic curve fitting,and SOPC is implemented.Compared with the several digital ultrasonic ranging algorithm currently used,the echo signal is processed by A/D converter and FIR bandpass filtering module,and the accuracy is effectively improved by temperature compensation.The research has a larger reference significance and application expansibility.
出处
《测控技术》
CSCD
北大核心
2014年第5期21-23,27,共4页
Measurement & Control Technology
基金
湖北省自然科学基金资助项目(2011CDB272)
关键词
数字超声测距
二次曲线拟合
SOPC
精度
digital ultrasonic ranging
quadratic curve fitting
SOPC
accuracy
