基于FPGA的超声波测距系统设计与实现

Research of ultrasonic ranging based on FPGA

针对单片机为控制核心的测距系统运行速度慢、抗干扰能力低且测量精度难以提高的不足,文中给出了以FPGA为控制核心、基于回波检测法的超声波测距系统,主要由超声波测距模块、FPGA模块和温度测量电路模块构成。实验表明:该系统运行速度快、抗干扰能力强,精度较高,可以满足车辆避障、液位测量等场合的用户需求。

For MCU as the core of the control system is running slow distance,noise immunity is low and difficult to improve the measurement accuracy is insufficient,This paper presents an FPGA as the control center,echo detection method based on ultrasonic ranging system,mainly by ultrasonic ranging module,FPGA module and temperature measurement circuit modules.Experimental results show that:the system is fast, strong anti-jamming capability,high accuracy,avoidance of vehicles to meet user demand level measurement and other occasions.