基于分布式网络的并行多通道数据采集系统设计

摘要

为满足工业监测指标多元化、站点管理集中化、数据传输实时性要求，构建一种基于分布式网络的并行多通道数据采集系统。远端数据服务中心与监测站点通过GPRS建立数据传输网络，现场监测站点具备网络管理、同步接收监测点数据及实时监测采集状态等功能。采集器硬件采用FPGA与嵌入式PC模块相结合，采用SRAM双缓存机制实现8通道高速同步采集。采用基于VC++多线程技术的网络管理机制，大幅提高了系统采样率指标，应用LabWindows/CVI集成化仪器控件完成信号分析。经仿真实验和应用于轨道监测领域，该系统稳定可靠、扩充性强、维护性好，实现了对多站点、多通道远程在线实时监测。%This paper proposes the multi-channel parallel data acquisition system based on distribution networkwhich is targeted for the demand of multi-index collection, integration of station management and real-time data transmission. With GPRS the wireless network of data transmission is connected between the remote data service center and the on-site unit. When the on-site monitoring unit is built to handle network management, simultaneous collection of data from each station and real-time monitoring for state of every data collection, the collection station is constructed to combine FPGA with embedded PC modules, and it presents high-speed synchronous data collection from eight channels by cache mechanism based on double SRAM. Multi-thread technology of VC++ , so that the sampling rate of the system is improved to a higher stage. Furthermore, the signal processing is completed by using instrument control integrated in LabWindows/CVI. The simulation experiment and application show thatthe track monitoring system is reliable, extensible and maintainable. The system proposed also realizes the remote online monitoring for multi-station and multi-channel data acquisition.