基于PXI Express的托卡马克同步数据采集系统设计

随着J-TEXT装置的发展，原有的数据采集系统在稳定性、模块化、采样率等方面已不能满足装置运行的需要，所以需建立一套新的数据采集系统来满足实验需求。本文介绍了基于PXI Express的托卡马克分布式高速同步数据采集系统的设计与实现。系统的采集单元由PXIe机箱NI PXIe-1062Q、PXIe控制器NI PXIe-8133和高速同步数据采集卡NI PXIe-6368组成，兼容ITER CODAC最新标准，具有良好的机械封装性、模块化程度高和高采样率等优点。系统采用同步差分采集方式采集实验数据，并将数据存储于核聚变领域通用的MDSplus数据库中。测试和使用结果表明，系统能在2 MSps采样率下连续稳定工作，可较好地满足装置运行的需要。

Design of Tokamak Synchronous Data Acquisition System Based on PXI Express

With the development of J-TEXT device, the original data acquisition system can’t meet the experiment’s requirement on stability, modularity and sampling rate, so a new data acquisition system needs to be built. This paper introduces the design and implementation of the distributed Tokamak synchronous high-speed data acquisition system based on PXI Express. The acquisition unit consists of PXIe case NI PXIe-1062Q, PXIe controller NI PXIe-8133 and high-speed synchronous data acquisition card NI PXIe-6368, compatible with the latest standard of ITER CODAC, so it has good mechanical sealing, strong modularity and high sampling rate etc. The system takes a synchronous difference acquisition for diagnosis signal. The data storage adopts MDSplus which is the general database in the nuclear fusion field. The test and experimental results show that the system can work continuously and stably at 2 MSps sampling rate, and meet the requirement of experiment device’s operation well.