摘要
文章主要是对远距离激光测距系统的关键技术进行研究,重点介绍了时刻判别方法与硬件实现,计时方法与实现。利用FPGA内部的PLL的倍频和移相来提高测量精度,具有成本低、系统简单且精度相对较高的特点。并提出了一种延迟滤波检测方法,只有当回波信号达到一定的脉宽才认为回波信号有效,有效减少噪声引起的毛刺所带来的误判。
In this paper, the key technology of the long distance laser ranging system is studied, and the method and the hardware realization are introduced emphatically, and timing method and Implementation. By using the frequency multiplication and phase shift of PLL inside the FPGA to improve the measurement accuracy, the system has the advantages of low cost, simple system and relatively high precision. A delay filter detection method is proposed. Only when the echo signal reaches a certain pulse width, the echo signal is effective, and it can reduce the error caused by the noise.
出处
《信息通信》
2016年第3期51-53,共3页
Information & Communications
关键词
激光测距
时刻判别
计时方法
延迟滤波检测
Laser ranging
Time discrimination
Timing method
Delay filter detection
