一种低成本高速以太网-RS485网关设计  

Design of a Low-cost High-speed Ethernet and RS485 Gateway

作　　者：贺春艳[1] 庹先国[1,2] 刘勇[1,2] 李怀良[2] 

机构地区：[1]成都理工大学地质灾害防治与地质环境保护国家重点实验室,成都610059 [2]西南科技大学核废物与环境安全国防重点学科实验室,绵阳621010

出　　处：《自动化与仪表》2014年第8期24-28,共5页Automation & Instrumentation

基　　金：国家自然科学基金重大科研仪器设备研制专项项目(41227802);国家杰出青年科学基金项目(40125015)

摘　　要：针对高速分布式地震勘探对多节点RS485和以太网互联的需求,该文采用物理层以太网集成芯片DP83848和STM32微控制器,设计一种低成本以太网—RS485网关,并利用"分时切换"和"前后台程序"配合的方法,对RS485及TCP/IP协议栈进行优化,以便提高运行效率。测试表明:该网关可实现2 M RS485网络和100 M以太网互联,当采集节点为24位1 kb/s采样率的数字检波器时,单网关可连接地震通道数超过100道。In view of the high speed distributed seismic exploration demand for multi-node RS485 and Ethernet connection. This paper adopts the physical layer of Ethernet integration chip DP83848 and STM32 micro controller to d sign a low-cost high-speed Ethernet and RS485 gateway. It uses ＂switch time-sharing＂ and with the ＂front-back programming＂ to optimize the RS485 and TCP/IP protocol stack to improve operation efficiency. The test shows that the gateway can achieve 2 M RS485 network and 100M Ethernet connectivity. Signal gateway can be connected seismic channel number more than 100 channels when the acquisition node was 24bit 1 kb/s sampling rate of digital geophone.

关 键 词：分布式地震勘探 网络数据采集 网关 RS485 协议栈 

分 类 号：TN915.05[电子电信—通信与信息系统]