摘要
本文分析了伪随机码超声波扩频测距的原理,针对超声波伪随机码的特点,提出了一种分三步快速确定伪随机码相关峰值的方法。相对直接相关和分两步相关大大减小了运算量,有利于快速测量和减小硬件复杂度。
The theory of the pseudo random code modulated ultrasonic distance measurement is analyzed in this paper. A new method for finding correlation peak value based on three-step correlation approach is given , considering the characteristics of the ultrasonic pseudo random code. Compared with the direct correlation and the two-step correlation approach , the new method reduces the calculatedamount greatly, and is helpful to rapid measurement and reducing the hardware complexity.
出处
《传感器世界》
2009年第7期27-29,26,共4页
Sensor World
关键词
超声波
伪随机码
三步相关法
ultrasonic
pseudo random code
three-step correlation approach
