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VirtuLab: Web Based Flow Visualization Facility
Final PresentationTeam 6 Members:
Justin Scott
Karen Davis
Sydni Credle
Mentor/Client: Professor:Dr. Shih Dr.Luongo
April 12, 2001
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Overview
Objective/Client Statement Background Information WBS and Scheduling Camera Mount Design LabVIEW 6.i
Contingency Plan Live Video Configuration VirtuLab Demonstration Conclusion Acknowledgements
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Objectives/Client Statement
Design and build a towing tank facility and the associated imaging process.
Provide visualization enhanced information to supplement the teaching of fluid mechanics.
Create computer interfaced instrument control for remote operation via the Internet.
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Background Information
A “fluid” is a substance that readily flows under applied shear (gases, liquids i.e. water, alcohol, gasoline).
Fluids can’t be detected by the human eye, therefore, the concepts behind fluid mechanics prove to be very difficult to learn.
Use of flow visualization to take out the guess work from the phenomena.
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Introduction
Learning/teaching Thermal Fluids is complex.
Distance learning purposes
Pre-lab student aid
Master each component separately
Move at own pace
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Goals for the Spring Semester
Web Page Design Incorporate LabVIEW
programming into design Embed live video streaming Background and procedure for
experiment Upload class deliverables for public
use
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Spring Semester Goals (continued)
LabVIEW Acquire LabVIEW version 6.i Train team members to use 6.i Final experiment interface design
(educational module) Consolidate motor controller
functions into one program Control via the Internet
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Spring Semester Goals (continued)
Existing Experiment Set-up Preliminary test of system Performance Analysis Design Modifications Calibration Final Testing
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Work Breakdown Structure
Project Management Activities Refinement of Client Statement Web Camera Imaging Camera Mount LabVIEW - Motor Controller Simulation/Testing Web Page Publishing
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Work Breakdown Structure (WBS)
(WBFVF) Web-Based Flow Visualization Facility
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Project Schedule
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Camera Mount Design Needs
Easily manufactured Cost efficient Lightweight Easily used
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Camera Mount Design Needs (Continued)
Capable of supporting camera Appearance uniform with existing equipment Locking mechanism Long lasting
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Existing Camera Mount
Camera Mount LocationAdjustable Pole
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Detailed Designs: 1st Plate and Slider
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Detailed Designs: 2nd Plate and Slider
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Camera Mount (continued)
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Finished Camera Mount
Machined and Assembled by Will Kincannon and Kevin Pittman
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Camera Mount: View #2
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Internet
PersonalComputer
Motor Controller
FlowVisualization
Facility
VisualizationCamera
WebCamFor Lab Video
Image streaming
LabView InternetConnectivity Toolset
Client Client Client
Schematic diagram illustrating basic setup of web-based flow visualization system.
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System Set-up
Remote Users
Physical Laboratory
(motor controller)
LabVIEW Interface
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System Configuration
Motor Controller
Camera mount locationTowing Tank
Motor
Web Cam Location
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What is LabVIEW?
Laboratory Virtual Instrument Engineering Workbench
Automation and Control of Equipment “G-programming”
Creation of programs using graphics Pictorial Block Diagrams instead of long lines
of syntax Straightforward data flow methodology
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LabVIEW 6.i Basics
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LabVIEW Diagram
Local Variable
Global Variable
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Local and Global Variables
Local variables pass information between applications within the same VI that cannot be wired.
Global variables are similar to local variables, except that information can be passed among several VIs.
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Figure (left), shows the VI that contains all of the Booleans and radio buttons that were used in all of the programs.
Location of All Global Variables
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LabVIEW Diagram with CGI Scripts
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LabVIEW Diagram (continued)
This CGI contains the environment and the content from the client.
Sends the response back to the client to the specified web browser.
Frees the resources associated with this specific subVI
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LabVIEW Troubleshooting
Published front panel would not appear from web browser.
LabVIEW program must be open
HTTP server must be running
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LabVIEW Troubleshooting
LabVIEW programs would not run consistently
Consolidated all of the global variables into one VI (virtual instruments)
Tried different wiring configuration
Changed global variables from read to write
Made Booleans and globals constants
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LabVIEW Troubleshooting (cont’d)
Testing the VIs with radio buttons in on and off within the specific VI and in myglobal2.vi
Attempted to consolidate the functions within a VI into various subVIs (sub program)
Tried to use the subVI’s contents instead of the actual subVI
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LabVIEW Troubleshooting (cont’d)
Used different formatting within the command string to the motor controller (i.e. commas, slashes, clears, as well as returns)
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Major Road Blocks
Consistency Problems Heavy Usage
Equipment Access Surpassing Technical Support Knowledge
Cutting Edge Application of LabVIEW Technology
As complexity increased, the amount of viable help decreased
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Contingency Plan for the Future
Allocate one PC machine as dedicated workstation Create a “controlled” environment
Implement Security System
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Computer Related Aspects
Remote instrument control via the Internet using LabVIEW programming
Video studio design for the lab imaging Real time video and data streaming via the
Internet
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Live Video
Enables students participating in the lab to view the flow visualization experiment
The students have video control in real time
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Steps Taken
Creation of initial web page Embedding live video window and controls Setting up web cam Installing and configuring RealProducer Basic on
experiment computer Setting up link to RealServer on COE server
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Creation of Initial Web Page
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Embedding Live Video Window and Controls
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VirtuLab Demonstration
http://www.eng.fsu.edu/~jwscott/projectpage.htm
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Conclusion
Fulfilled all main objectives stated at the onset
The interactive portion of the experiment via the web has been developed and is ready for use
Applied principles from the Mechanical Design Process
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Conclusion (continued)
Success even through many road blocks and many barriers.
Great team dynamic. Acquired skills that can be used in future
endeavors.
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Acknowledgements
Dr. Shih Dr. Luongo Bill Kinkannon, Kevin Pittman and Crew LabVIEW Technical Support
Jason Hobbs COE WebMasters
Drew Kokur Dr. Van Dommelon