Time Synchronization Network for Data Acquisition System of the Poloidal Field Converter on EAST

摘要

For lack of effective methods of time synchronization, the former poloidal field (PF) converter data acquisition system on EAST met the trouble of asynchronous sampling during the process of data acquiring. In this paper, a method to synchronize time is described according to the requirement of PF converter data acquisition system, implements and verifies along with the regular upgrade of hardware and software on PF converter. With this method, a master node with a hardware clock synchronizes time of the slave nodes on the private time network in each second, and the maximum offset time between the master and the slave is < 15 mu s without network load and 35 mu s with network load. The time synchronized method is evaluated and tested with its feasibility, proving to be portable to different hardware and software configurations.