Management of remote field instrumentation via the Internet

111 Pages·2016·7.04 MB·English

by  Victor A. Acuña

Florida International University
FIU Digital Commons
FIU Electronic Teses and Dissertations University Graduate School
4-7-2003
Management of remote feld instrumentation via
the Internet
Victor A. Acuña
Florida International University
DOI: 10.25148/etd.FI13101524
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Acuña, Victor A., "Management of remote feld instrumentation via the Internet" (2003). FIU Electronic Teses and Dissertations. 1134.
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FLORIDA INTERNATIONAL UNIVERSITY
Miami, Florida
MANAGEMENT OF REMOTE FIELD INSTRUMENTATION VIA THE INTERNET
A thesis submitted in partial fulfillment of the
requirements for the degree of
MASTER OF SCIENCE
in
ELECTRICAL ENGINEERING
by
Victor A. Acua
2003
To: Dean Vish Prasad
College of Engineering
This thesis, written by Victor A. Acufa, and entitled Management of Remote Field
Instrumentation via the Internet, having been approved in respect to style and intellectual
content, is referred to you for judgment.
We have read this thesis and recommend that it be approved.
Armando B. Barreto
M. Ali Ebadian
Jean A ri 9, Major Professor
Date of Defense: April 7, 2003
The thesis of Victor A. Acuia is approved.
Dean Vish Prasad
College of Enginepig
5
1 ean Vduglas Wartzok
University Graduate School
Florida International University, 2003
ii
DEDICATION
I would like to dedicate this thesis to my parents, Blanca L. Alfaro and Victor M.
Acuna, for their support and dedication towards the fulfillment of my education and goals
in life. To my lovely wife, Roxana Acuia and my future son/daughter, for their love,
support, and understanding in completion of my graduate coursework and this
manuscript.
"Imagination is more important than intelligence." Albert Einstein
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ACKNOWLEDGMENTS
I wish to thank first and for most God, for the gift of life and academic discipline.
I want to thank the Hemispheric Center for Environmental Technology and Dr. Ali
Ebadian for providing the economic resources and laboratory equipment to complete this
thesis. A special thanks for the guidance and example of Jose Varona, Celso Duran,
Leonel Lagos, Sarkis Shahin, and the rest of the Engineering and Technology Group.
I also want to extend my gratitude to my committee members, Dr. Armando
Barreto and Dr. Jean Andrian, for their academic example and encouragement. My
parents, Victor & Blanca, my lovely family, Roxana & baby, and my friends. Lastly, to
all the great scholars of our time for their example and refusal to believe that nothing is
impossible.
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ABSTRACT OF THE THESIS
MANAGEMENT OF REMOTE FIELD INSTRUMENTATION VIA THE INTERNET
by
Victor A. Acufa
Florida International University, 2003
Miami, Florida
Professor Jean Andrian, Major Professor
Supervisory Control & Data Acquisition (SCADA) systems are used by many
industries because of their ability to manage sensors and control external hardware. The
problem with commercially available systems is that they are restricted to a local network
of users that use proprietary software. There was no Internet development guide to give
remote users out of the network, control and access to SCADA data and external
hardware through simple user interfaces.
To solve this problem a server/client paradigm was implemented to make
SCADAs available via the Internet. Two methods were applied and studied: polling of a
text file as a low-end technology solution and implementing a Transmission Control
Protocol (TCP/IP) socket connection.
Users were allowed to login to a website and control remotely a network of
pumps and valves interfaced to a SCADA. This enabled them to sample the water quality
of different reservoir wells. The results were based on real time performance, stability
and ease of use of the remote interface and its programming. These indicated that the
most feasible server to implement is the TCP/IP connection. For the user interface, Java
applets and Active X controls provide the same real time access.
v
TABLE OF CONTENTS
CHAPTER PAGE
I. IN TRO D U CTION ................................................................................................... 1
A . Research Problem ................................................................................................. 1
B . Experim ental Setup and constraints..................................................................... 3
C . Theory of O peration............................................................................................. 5
D . Literature Review ................................................................................................. 8
II. EM BED D ED SY STEM S........................................................................................ 12
A . Program m ing of em bedded system s ................................................................... 13
B . Interfacing the SCA D A w ith external hardw are................................................. 16
III. SERIA L CO M M UN ICA TION S............................................................................ 20
A . M ain program .......................................................................... 21
B . Server program m ing .......................................................................................... 26
1. Text file server ............................................................................................... 28
2. TCP/IP server................................................................................................. 30
IV. INTERNET PROGRAMMING FOR TEXT FILE SERVER ............................... 34
A . Client & Server Scripting...................................................................................... 35
1. Fram e 1 - rem ote0.asp................................................................................... 37
2. Fram e 2 - realtim e1.asp ................................................................................. 40
3. Fram e 3 - float.asp........................................................................................ 44
4. Fram e 4 - w ebcam .htm ................................................................................. 45
B. Security ................................................................................................................. 45
V. INTERNET PROGRAMMING FOR TCP/IP SERVER....................................... 49
A. Active X controls .................................................................................................. 50
B . Java A pplets........................................................................................................ 51
C . Security ...................................................................................................... .. 52
V I. R ESU LTS A N D O B SERV AT ION S..................................................................... 54
A . Future w ork and recom m endations................................................................... 56
V II. CO N CLU SION .......................................................................................... ...... 59
LIST O F REFEREN CES.............................................................................................. 62
APPENDICES .................................................................................................................. 64
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LIST OF FIGURES
FIGURE PAGE
1. Schematic of bench test setup................................................................................... 3
2. Close up view of pump and valve network ............................................................. 4
3. Thesis development timeline...................................................... 7
4. Program 1 (triggers sensors when told to do so) ...................................................... 14
5. Program 2 (sends status data back to host computer)................................................ 15
6. CRIOX and driver circuit. (courtesy of HCET E&T)............................................ 17
7. RS232 (DB9) pin out and transmission scheme ..................................................... 20
8. Snapshot of local/main control panel .................................................................... 22
9. Client-server paradigm .......................................................................................... 27
10. TCP segment format............................................................................................... 32
11. Representation of clients and servers connected by the Internet............................ 35
12. Central control console (CCC) for remote users, (cpanel.asp).............................. 36
13. Frameset layout and code for cpanel.asp................................................................ 38
14. Confirmation of data entry...................................................................................... 43
15. Login screen for a remote user .............................................................................. 46
16. Active X control for CCC..................................................................................... 51
17. Java Applet for CCC............................................................................................... 53
18. frmCpanel ................................................................................................................. 70
19. frmDialog.......................................................................................................... .. 75
20. frmServer................................................................................................. ............ 76
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LIST OF ACRONYMS
API: Application Program Interface
ARPANET: Advanced Research Thesis Agency Network
ASCII: American Standard Code for Information Interchange
ASP: Active Server Pages
CCC: Central Control Console
CGI: Common Gateway Interface
COM: Communication ports
CSV: Comma separated values
DOE: Department of Energy
E&T: Engineering and Technology group
FIU: Florida International University
GPIB: General Purpose Interface Bus
GUI: Graphical User Interface
HCET: Hemispheric Center for Environmental Technology
HTML: Hypertext Markup Language
I/O: Input/Output
IE: Internet Explorer
IRQ: Interrupt request line
JSP: Java Server Pages
LAN: Local Area Network
OCTOPUS: Laboratory setup (network of pumps, valves and sensor array)
ORP: Reduction-Oxidation
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PDA: Personal Digital Assistant
PHP: Pearl Helper Pages
RAM: Random Access Memory
ROM: Read Only Memory
RPC: Remote Procedure Call
SCADA: Supervisory Controlled & Data Acquisition
SQL: Standard Query Language
SRS: Savannah River Site
TCE: Trichloroethylene
TCP/IP: Transmission Control Protocol/Internet Protocol
VB: Visual basic
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