Computational framework for remotely operable laboratories

摘要: Decision-makers envision a significant role for remotely operable laboratories in advancing research structural engineering, as seen from the tremendous support network earthquake engineering simulation (NEES) framework. This paper proposes computational framework that uses LabVIEW and web technologies to enable observation control of laboratory experiments via internet. The framework, which is illustrated shaketable experiment, consists two key hardware components: (1) local has an NI-PXI with measurement acquisition along Windows-based PC acquires images high-speed camera video, (2) proxy server controls access network. software data/video are developed form virtual instruments (VI) using development system. employs user-based authentication protocol provide security experiment. user can run perl-based CGI scripts on scheduling or observe experiment future timeslot well gain during timeslot. implements single-controller multiple-observer architecture so many users simultaneously download measurements single controller decides waveform input into shaketable. A provision also created view real-time video Two different methods communicate studied. It concluded JPEG compression acquired offers best performance over wide range networks. accessible by remote computer internet connection runtime engine available at no cost user. Care taken ensure implementation applications perl have little dependency ease portability other experiments.