200-Channel Distributed Synchronous Parallel Data Acquisition System
Yanfang Wang · Shuju caiji yu chuli · 2004
The design and the realization of an industrial PC based 12-bit 200 channels distributed synchronous parallel data acquisition system are described. To reduce total cost,several methods are compared and tested during this design process. Using an uniform clock fan-out device as the time base,the central control part controls the whole distributed system synchronously by sending system command via 100 M Ethernet. In an industrial PC,data acquisition cards share DRAM of the PC to extend continuous sampling time. The design uses some techniques to decrease the crosstalk and the noise of signals. During the design of the system,designers compare several operating systems,including Windows98,Linux2 2 and VxWorks,and experiments of some realizations of their interrupt routines also enhance the run-time stability. The system is composed of modules and can be configured depended on the application without performance loss. The design perfectly balances the cost and the performance of the system.