Virtual Oscilloscope Laboratory Experiment - Introduction...

Info icon This preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
1 Introduction The use of the Internet has been expanding exponentially and is now extensively used as a connectivity and reference tool for commercial, personal and educational purposes. In particular, the Internet provides many new learning paradigms, including distant and group learning. More recently, the technology has even extended into the realm of conducting laboratory experiments at any time from any location through the Internet. In Politecnico di Milano [1, 2], a university distance teaching system that provides lessons, seminars and tutoring has been operating for a few years. In the University of Erlangen-Nuremberg, a virtual classroom [3], which uses HTML (Hypertext Markup Language) and HTTP (Hypertext Transport Protocol) to introduce the capabilities of VHDL (Very Large Scale Integrated Hardware Description Language) tools, was constructed. In [4], the interactive and computational capabilities of Java were demonstrated through a simple matrix assembly Java applet. These virtual laboratories provide instrument simulators, which can be a powerful auxiliary didactic tool for students to have a basic idea of the instruments, their control and operation. [5] describes some remote laboratories on experiments that can be run remotely via a web interface. This type of laboratory is well suited for distance learning where students need not be physically on campus. Parameters can be set on the web, and a software interface converts these parameters to a form that is accepted by the local computer running the experiment. Atul and Molly [5] developed the software for "Second Best to Being There", a distance learning application that allows a remotely-located user to conduct experiments in the Control Engineering Laboratory at Oregon State University. This permits the experiments to be run via the WWW (World Wide Web). Access requires only a basic web browser that runs Java and is possible from most computer platforms. A robot experiment was developed for the demonstration. Bytronic Process Control unit [6], referred to as the process rig in the Process Control and Automation Laboratory at Case Western Reserve University, can be accessed remotely via the Internet. Using a web browser, the user can log on and post the
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
2 parameters from a remote client to a LabVIEW (Laboratory Virtual Instrument Engineering Workbench from National Instruments [7, 8]) web server that is connected to a process rig via a PLC (Programmable Logic Control) module. The image is generated by a program and refreshed using server push technology. In this paper, we present an approach to control real instruments remotely and describe a remote oscilloscope experimentation system, VLAB, developed using this approach. LabVIEW as well as WWW techniques such as CGI (Common Gateway Interface), JavaScript and HTML were used. Users only need a graphical browser, which supports JavaScript, to conduct and monitor the experiment remotely. User-friendly interfaces have been built and a video server is being used to live broadcast what happens in the real laboratory.
Image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern