摘要
针对多个主动超声探测器同时探测目标存在的相互干扰问题,设计了基于回波自调距离门的FPGA控制器。该控制器利用接收到的回波信息自动调整距离门的选通时机,可以达到抑制探测器相互干扰的目的。同时,利用硬件描述语言和有限状态机的方法完成了整个系统的设计。仿真结果表明,该控制器结构简单,实现了快速发现、确认目标回波信号的能力,提高了系统抗干扰的能力,其工作频率可以达到194.4 MHz。
A echo-based self-adjusting range-gated controller using FPGA has been designed to solve interference between multiple active ultrasonic detectors aiming at the same targets.With distance information extracted from the echo,the controller adjusts gate so that interference of adjacent detectors could be suppressed.The system was designed with hardware description language and finite state machine methods.Simulation results show that the structure of the controller is simple,facilitating the system to detect and identify target quickly and reliability with better anti-interference performance.The control system operating frequency is up to 194.4 MHz.
出处
《电子技术应用》
北大核心
2013年第10期33-35,38,共4页
Application of Electronic Technique
基金
高等学校博士学科点专项科研基金(200802880002)
关键词
FPGA
回波
自调
距离门
主动超声探测
FPGA
echo
self-adjusting
range-gate
active ultrasonic detection
