相关算法在实时超声检测系统中的应用研究

A Study of Application of Correlation Approach in Real Time Ultrasonic Detecting System

针对自动泊车系统中感知距离信息的需要,对相关算法在实时超声检测系统的应用进行了研究。介绍了一种基于调制解调技术和匹配滤波器原理的平方和包络相关算法,降低了信号的采样率要求,提高了处理速度,设计了超声波采集系统,通过RS-422高速串口传输采样数据,并借助上位机处理器计算相关函数,较好地实现了相关算法在实时系统中的应用。

For the purpose of getting distance information in automatic parking system,this paper has studied the application of correlation approach in real time ultrasonic detecting system.The paper presents a new correlative robust distance measurement approach based on the technology of modulation and demodulation and the principle of matched filter,which reduces the requirement of sample rate,and improves the rate of processing.The paper has designed an ultrasonic sample system,which transmits the sample data to the computer by RS-422 high speed serial port,and correlation functions are calculated by upper computer.It is an effective application of correlation approach in real time system.