摘要
针对高铁地震预警设计了一套基于C/S构架的六通道24 bit数据采集系统。系统硬件由控制板和可拆卸式多通道采集板组成。控制板由STM32F407单片机、SD存储卡和以太网接口组成,完成采集板控制,数据的读取、存储和传输功能;采集板由FPGA控制母版与6个独立的24 bit AD采集卡组成,完成六通道AD同步采样、数据打包和传输功能。服务器通过移植lwip,结合客户端Lab VIEW网络编程,完成了C/S构架软件系统设计,实现了数据远程参数设置和波形实时显示等功能。测试结果表明:采集系统通道一致性好,在200 sample/s采样率下每通道数据采集信噪比优于140dB。
24-bit data acquisition system is designed based on C/S structure for High-speed Railways earthquake early warning,the hardware of system contains control board and detachable data acquisition board. Control board is composed of STM32F407 microcontroller,SD memory card and Ethernet interface,the main function of control board contains data sampling control,storage and transmission; data acquisition board is composed of FPGA control board and 6-ch 24-bit sampling card,which functions include data sampling,packing and transmission. The C/S structure software is achieved by transplanting Lw IP in server,implementing network function by Lab VIEW in client,which function include remote parameter setting and data waveform display. The test result shows that： the acquisition system channel consistency is good,and the SNR is better than 140dB on the condition of 200 sample/s sampling rate.
出处
《电子器件》
CAS
北大核心
2015年第2期442-446,共5页
Chinese Journal of Electron Devices
基金
宜昌市科学技术局(A14-302-a04)
关键词
高铁地震预警
C/S构架
数据采集系统
同步采集
FPGA
high-speed Railways earthquake early warning
C / S structure
data acquisition system
synchronization sampling
FPGA
