EAST central timing system based on PXI (extension for instrumentation)

The invention discloses an EAST central timing system based on PXI (extension for instrumentation), comprising a master control computer, a database server, PXI master nodes, PXI partial nodes and a separated driver which accesses to the PXI master nodes and the PXI partial nodes, wherein the master control computer, the database server, the PXI master nodes and the PXI partial nodes access to anEAST local area network respectively. In the system, a LabVIEWFPGA technology is adopted, thus system functions are upgraded more flexibly and conveniently. The system can be used to provide nanosecond-level clock signals and trigger signals with adjustable pulse width, selectable polarity and controllable enabling property, and is provided with an event trigger function, a signal acquisition function and a system self-checking function. The system can realize clock synchronization and trigger synchronization among partial nodes accurately and is convenient to expand. In the system, PXI industrial products are selected, and a virtual instrument technology is utilized to realize information interaction between hardware equipment and application programs seamlessly.