EAST电场实时采集与处理系统

Electric Field Real-time Acquisition and Processing System for EAST

摘要:

EAST是国家大科学工程实验装置,在实验放电过程中,其周围有着非常复杂的电场环境;为了在放电期间达到实时监控周围电场的要求,进而设计了电场实时测量系统;该系统在实验过程中,检测瞬态电场的分布及其强度,为电磁兼容(EMC)的设计提供实时的数据分析;其硬件架构主要包含单极子电场探头,光电隔离设备,RAID磁盘阵列以及PXI平台,软件主要使用LabVIEW对FPGA进行软件编程,对数据进行实时的采集和处理;经过测试,目前该系统可实现单个通道,50 MHz/s采样率的数据采集以及四通道12.5 MHz/s的同步数据采集,满足了对高频模拟信号进行多通道实时数据采集、处理和存储要求。

Abstract:

The experimental advanced superconducting Tokamak(EAST) is the national large scientific experiment device. The electromagnetic environment around the EAST is very complex during plasma discharge experiment. In order to fully monitor the changes of electric field around the EAST device during plasma discharge, a real-time electric field measurement system has been designed. During plasma discharge, this system measures the transient electric field distribution and strength to provide real-time data analysis for the electromagnetic compatibility (EMC) design. The hardware architecture consists mainly of a monopole electric field probe, photoelectric isolation device, RAID disk array and PXI platform. The system uses the LabVIEW to program on the FPGA for the real-time data acquisition and processing. By testing, it can realize one analog channel, 50 MHz/s sampling rate and make synchronous data acquisition with four analog channels, up to 12.5 MHz/s sampling rate, which is able to meet the demand of acquiring, processing and storing the real-time data in the high-frequency analog signals multi-channel mode.