基于单片机的窄带电力线载波通信模块设计

Design of Narrowband Power Line Carrier Communication Module Based on MCU

设计了基于通用单片机的电力线载波通信模块。首先给出了载波模块的总体设计,其次进行了详细的软硬件设计,最后进行了模块测试。载波模块采用瑞萨高性能单片机R5F100BE、UTC的解调芯片MC3361BPL及外围电子元器件,设计了过零检测电路、载波耦合电路、载波发送放大电路、载波解调电路,形成了先进的低成本电力线载波模块硬件。软件采用了BFSK调制、直接扩频技术,设计了单芯片三信道通信软件流程,在有限的计算资源下实现了三信道通信互不影响,并给出了发送与接收模块程序设计、DFT解码算法设计,实现了高灵敏度的421±15 kHz频率的电力线载波通信。该设计具有实现成本低、研发投入小等优势,在电力线物联网领域具有一定的实用价值。

In the paper,a power line carrier communication module based on a universal microcontroller is proposed.Firstly,the overall design of the carrier module is presented,followed by detailed hardware and software design,and finally module testing is conducted.The carrier module adopts Renesas high-performance microcontroller R5F100BE,UTC's demodulation chip MC3361BPL,and peripheral electronic components.It designs a zero crossing detection circuit,carrier coupling circuit,carrier transmission amplification circuit,and carrier demodulation circuit,forming advanced low-cost power line carrier module hardware.The software adopts BFSK modulation and direct spread spectrum technology,and designs a single chip three channel communication software process.Under limited computing resources,the three channel communication is not affected by each other,and the program design of the sending and receiving module and DFT decoding algorithm are provided.High sensitivity 421±15 kHz power line carrier communication is achieved.This design has the advantages of low implementation cost,flexibility,and low research and development investment,and has certain practical value in the field of power line IoT.