Design of Networked Dual-Core Parallel Processing Data Acquisition System

Abstract

Whether the test of free-flight stall/spin can be carried out successfully, it depends on the airborne anti-stall parachute system, the performance indexes of the system are related to the test pilots’ safety directly. There are large numbers of test signals in the system and half of them are transient pulse signals, so it requires high real-time capability and data throughput level. Thus the danger of the Ignition testing experiment, Telemetry Tracking Monitoring is requisite. To satisfy the need of measuring electric parameters of an airborne anti-stall parachute system, a multi-thread real-time DAQ system of multi-task is constructed, using dual-core industrial computer and high-speed DAQ card as its core, LabWindows/CVI as VI software platform. By a method of dual-core parallel processing through OS kernel, system accomplishes multi-channel data acquisition with high real-timing and huge data throughput, and through TCP/IP, ODBC interface, remote measurement and database management is also accomplished. At the last, the system design a modularize software by DLL technology, packaging several functional modules in DLL form. This system implements the multi-thread mechanism and its synchronization, TCP/IP communication and parallel processing under LabWindows/CVI platform. Finally high real-timing and reliability of this system are validated by experiment.