摘要
本文介绍一种基于ARM9的激光测距系统的硬件原理设计和软件设计方案。以ARM9处理器为控制核心,采用相位法激光测距技术,首先用正弦信号调制半导体激光器的发射激光,然后将被测物反射的激光用光电探测器转换为电信号,采用相位测量技术测量出发射信号与接收信号的相位差,从而计算出与被测物的距离。最后使用实时操作系统μC/OS-Ⅱ作为系统控制核心,以确保测量精度。
This paper introduces the design of circuit principle and software design of laser distance measurement system which is based on ARM9. Based on ARM9 processor,this system using the phase method to complete. Firstly,the transmission laser is modulated by a sinusoidal signal. Then convert the reflected laser to electrical signals with a photoelectric detector. And we measure the phase of the transmitted signal and the received signal with phase measurements techniques,to calculate the distance with the phase. Finally,how to configure the software control core of μC/OS-II real-time operating system to guarantee the measurement precision is shown.
出处
《电子测试》
2013年第5S期85-86,共2页
Electronic Test
关键词
ARM9
滤波
激光测距
差频测相
ARM9
filter
laser ranging
differential frequency of phase measuring
