基于FPGA的ELIS井下仪器总线控制器的设计  

Design of ELIS Downhole Instrument Bus Controller Based on FPGA

作　　者：李谦 周建琼 张菊茜 LI Qian;ZHOU Jianqiong;ZHANG Juqian(Well Tech of China Oilfield Services Limited,Sanhe,Hebei 065201,China)

机构地区：[1]中海油田服务有限公司油田事业部,河北三河065201

出　　处：《石油管材与仪器》2021年第1期33-37,共5页Petroleum Tubular Goods & Instruments

摘　　要：为解决ELIS井下总线控制器电路复杂、应用不够灵活的问题,提出一种以可编程门阵列(FPGA)为硬件平台,开发嵌入式ELIS井下总线控制器,替代编解码芯片实现ELIS井下总线通讯的方法。分析了设计中遇到的时钟漂移、同步器的亚稳态性等问题并提出了解决方法,搭建了用于ELIS井下总线通讯的测试平台,并对该总线控制器进行调试。实验结果表明,该控制器实现了仪器数据接入ELIS井下总线的目标,且具有设计简单、应用灵活、稳定性好等特点。Aiming to solve the problem of complex circuit and inflexible application of ElIS downhole bus controller,a design method of developing embedded ElIS downhole bus controller based on FPGA is proposed to replace codec chip and realize ElIS downhole bus communication.After analyzing the clock delay and the critical steady synchronizer which are difficult in the design,some settlement methods are introduced.Also,the test platform for ElIS downhole bus communication is built to debug the bus controller.The results show that the controller has a flexible application,good stability with simple design,and reaches the goal of data access to ELIS downhole bus.

关 键 词：测井仪器总线 曼彻斯特码 FPGA 亚稳态 

分 类 号：P631.84[天文地球—地质矿产勘探]