Designs for Synchronous Data Acquisition of a Distributed System

Abstract:

To resolve the problem of acquiring multi sensors signals synchronously in a distributed system, a project of distributed synchronous data acquisition based network time server was designed. The system comprised multi distributed sensor units, a centralized control unit and D&C (display and control) center. Each sensor unit was equipped with a data acquisition module. All data from sensor units were concentrated and sent to the D&C center, and the D&C center implemented power supply and management of sensor units via the centralized control unit. To synchronize the data acquisition modules, a network time server was employed in the D&C center. It received standard time information from GPS and outputted the time signal with DCF77-encoding. Each data acquisition module received and decoded DCF77 time signal, obtaining absolute time and synchronizing its time base. Above project was applied successfully in a system comprising 20 distributed sensor units. The results prove the designs feasible.

• Periodical: Applied Mechanics and Materials (Volumes 239-240)
• Pages: 869-872
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.239-240.869
• Online since: December 2012
• Authors: Zuo Xi Tian, Feng Yu, Zeng Wu Liu
• Keywords: Data Acquisition, DCF77, Distributed System, Network Time Server, Synchronization

References

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