sdmay06-08 industrial review panel smart house ventilation system april, 25 th 2006
TRANSCRIPT
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SDMay06-08 Industrial Review Panel
SDMay06-08 Industrial Review Panel
Smart House Ventilation System
April, 25th 2006
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SDMAY 06-08
Faculty Advisors
Dr. Zhao Zhang
Dr. Arun Somani
Client
National Instruments
Team members
Austin Kelling
Carson Junginger
Suwandi Chandra
Gerald Ahn
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Outline
Project Overview Definition Acknowledgements Problem Statement Operating Environment Intended users & uses Assumptions &
Limitations
Expected End-product Detailed Design
Network Setup Device Control Server Interface Design
Design Approach Future Changes
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List of Definitions
Floor - floor in this report is used to describe one story or level of a building
HVAC - stands for Heating Ventilation and Air Conditioning, and is sometimes referred to as climate control. The acronym is made because these three functions are closely related, as they control the temperature and humidity of a building
GUI – acronym for Graphical User Interface
LabVIEW - Laboratory Virtual Instrument Engineering Workbench, a graphical programming language that is used to program the QBX module
QBX - A LabVIEW programmable hardware used to sense, process, store, and communicates via Bluetooth and serial port
VI (Virtual Instruments) - Sub-unit program in LabVIEW that represents the appearance and function of a physical implement
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Acknowledgements
National Instruments Dr. Zhao Zhang Dr. Arun Somani Jason Boyd
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Project Definition
Find a way to use the remote sensing and controlling device QBX to automatically and independently control the temperature on any floor of a multi-story house.
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Problem Statement
General Problem Every multi-story home owner suffers from undesired
temperature differences on different floors of their home.
Normally thermostats are only on one floor, creating temperature differences amongst the floors.
More effective control is needed in order to control the temperature differences between floors.
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Solution Approach
General Solution-Approach QBX modules will be placed on each floor of a multi-story
house. LabVIEW will be used as a UI (User Interface) so the system is
easy to use and easy to control by the user. QBX modules will be used to measure room temperature at all
times. The QBX modules will control motors used to open or close
vents depending on the temperature of individual floors. A central computer will be used to control and manage the
QBX modules.
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Operating Environment
Will be used indoors, and kept out of the rain, snow, wind or extreme temperature.
The QBX will be shielded from dust, household elements, and accidental bumping
The QBX modules will be placed centrally on each floor in an area with sufficient airflow to allow accurate temperature readings from each floor.
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Intended user and uses
Intended User Multi-story homeownerIntended Uses Control the temperature of each floor of a house
independently Control the air flow of heating or cooling elements
depending on the differences between the actual and desired temperature
Increase convenience and efficiency of a home HVAC system
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Assumptions 1/2
User Assumptions User knows English in order to understand the user
interface User has basic knowledge of how to operate a
personal computer The host computer can only be accessed only by
authorized users The user has the server program running 24 hours a
day, 7 days a week
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Assumptions 2/2
System Assumptions The system is designed for a three floor house The system has a user friendly graphical user interface This system is the only heating and cooling system in
the house The system is able to control the furnace and air
conditioning electronically The vents to each floor are able to be opened and
closed by our system
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Limitations 1/2
The user owns a computer running Windows XP operating system, and plans to dedicate some of the machine’s resources to the server program.
The host computer must have LabVIEW embedded installed The user must enable remote desktop on the host computer for
remote management The user owns an IOGear GBU311 Bluetooth adapter, and it is
connected to the host computer The distance between each QBX module and the host computer
should be no more than 30 feet. QBX modules placed beyond this limit may respond slowly or not connect.
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Limitations 2/2
No other devices with the same Bluetooth ID as any of the QBX modules may be present
The temperature of the location where the system is installed must be kept between 0ºF and 120ºF. Exposure to extreme temperatures may damage the QBX modules.
The QBX module must be plugged into an AC adapter (5V, 1A) at all times
The duration of the project must not exceed two semesters; the team should consider a design that can be implemented in this time
The project budget should not exceed $150
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End Product and Other Deliverables
Host Computer GUI QBX Module with LabVIEW Embedded VI Prototype Housing User Manual
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Approaches Considered
Wireless Router system using multiple QBX modules, capable of supporting computers and printers
Home control system and Other extensible modules for QBX
Ventilation Control System (Chosen)
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Technology Considered
QBX Connection with Host All QBX's connected to wireless hub Host computer Bluetooth adapter (Chosen)
Ventilation Control Commercial Stepper Motors Old CD-Rom drive motors (chosen)
Prototype Methods Multi-level demo with hot and cold elements Multi-level demo with hot element and exhaust (chosen)
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Project Definition Activity
Tried to create a project that would be innovative, able to be accomplished in two semesters, costs under $150, and able to be demonstrated
Came up with the idea for a smart house ventilation system, with mach prototype of a three story house and heating system
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Research Activities
Major research areas LabVIEW state variables Prototype airflow control Current amplifying circuit Reed relay operation
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Design Activities 1/2
For the host computer The user will turn system control on or off. The user will then set the desired temperature that
each floor should maintain (+/- 3 degree accuracy). The system will show the 24 hour history of
temperature per floor
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Design Activities 2/2
On the QBX modules If the temperature of the floor that the QBX module is
monitoring differs from the temperature set by the user, the QBX will open the vent, and if the temperature control device is not already on, the QBX will turn it on.
The QBX modules will all work independently to ensure that each of the floors of the house are at desired temperatures.
The prototype will accept commands from the QBX modules and will provide heating and cooling for demonstration
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Prototype Circuitry
Floor 2 Vent Motor
+
-
+
-
F lo o r 3 R e la y
V O N = 5 . 0 VV O F F = 0 . 0 VAOut1 Control line
GND
Power Supply
AOut1 Control line
+
-
+
-
F lo o r 1 R e la y
V O N = 5 . 0 VV O F F = 0 . 0 V
Floor 1 Vent Motor
W a ll P o we r
1 1 0 V a c
QBX 2
+
-
+
-
F lo o r 2 R e la y
V O N = 5 . 0 VV O F F = 0 . 0 V
Floor 3 Vent Motor
QBX 3
P o we r S u p p ly V o lt a g e
5 V d c
AOut1 Control lineQBX 1
Prototype Circuitry Diagram
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Main Control of Host GUI
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Floor 1 for Host Control GUI
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Implementation Activities
Programming Virtual Instrument using LabVIEW 7.1
Building prototype housing for demonstration Integrate the Virtual Instrument with the QBX
and the housing prototype
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Diagram of Host GUI
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Housing Implementation
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Testing Activities
Tested network connection between QBX modules and host computer
Tested temperature sensors and system response to temperature changes
Verified QBX module voltage output Tested the Graphical User Interfaces Tested heating element output and floor
temperature variation
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Prototype Testing
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Resources & Schedule
Personal Effort
Austin Kelling
Carson Junginger
Suwandi Chandra
Gerald Ahn
147
103146
145
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Other Resource Requirement
Item Team Hours Other Hours Cost
Poster Printing 14 2 Donated
Poster Materials 0 0 $25.00
Bluetooth Adapter 0 0 $40.75
2 SHT 11 sensors 0 0 $43.84
Soldering for sensors 0 0 Donated
3 Old CD-Rom drives 0 0 Donated
Breadboard 0 0 Donated
Assorted Electronics 0 0 Donated
Prototype Housing & Ventilation 0 0 $30.39
Heating element 0 0 Donated
Total 14 2 $149.98
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Financial Requirement
Labor ($11.00/hour)
Carson Junginger $1,133.00
Austin Kelling $1,595.00
Gerald Ahn $1,617.00
Suwandi Chandra $1,606.00
Subtotal $5951.00
Total $149.98 $6,100.98
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Schedules 1/2
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Schedules 2/2
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Present Accomplishments
Project Definition 100% Fully Met
Technology Consideration 100% Fully Met
End-Product Design 100% Fully Met
End-Product Implementation 95% Partially Met
End-Product Testing 80% Partially Met
End-Product Documentation 100% Fully Met
End-Product Demonstration 100% Fully Met
Project Reporting 100% Fully Met
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Project Evaluation Criteria 1/3
Project DefinitionEvaluation Criteria: This was evaluated as fully met due to the team selecting a possible project.
Technology Consideration and SelectionEvaluation Criteria: The team evaluated how well the chosen technologies help the team design the overall system.
Product DesignEvaluation Criteria: The team evaluated how well the product design actually fulfills all the specifications that were stated in the requirements section.
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Project Evaluation Criteria 2/3
Product ImplementationEvaluation Criteria: The team evaluated whether the implementation of the prototype reflects the functional requirement and end product design.
Product DocumentationEvaluation Criteria: The team determined how clear the documentation provided to the user was.
Product TestingEvaluation Criteria: The team evaluated how well the prototype performs and if it displays the end result of the integrated system.
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Project Evaluation Criteria 3/3
Product DemonstrationEvaluation Criteria: The team evaluated the demonstration of the prototype and determined how well the system performs according to the definition and the design that the team stated previously.
Project ReportingEvaluation Criteria: The team evaluated if all of the documents the team wrote met the expectations previously stated.
Final Project ScoreThe result of the project evaluation is 97.5%, an average of the different parts of the evaluation. This shows that the project has been successfully completed by the team.
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Commercialization
The system is not ready to sell to the public. It would need to undergo much more development, and become more stable in order to be released.
Would need a generic way to connect to existing HVAC systems
The cost is undetermined because the QBX modules are prototypes and not in production by National Instruments.
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Recommendations For Additional Work
Heating and Cooling element operation controlled by system
Extended range of QBX module communication
Efficiency analysis compared with a real house Cost benefit analysis
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Lessons Learned 1/2
What went well Found or were donated many of the parts QBX control of motors
What didn’t go well Defining the project Slow early development Documentation
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Lessons Learned 2/2
Technical knowledge gained LabVIEW programming Experience with hardware software integration Learned allot about output capabilities and circuit
characteristics
Non-technical knowledge gained Project management skills Learned the importance of meeting deadlines
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Risk Management
Anticipated risks Delay of project design Loss of code
Unanticipated risks encountered Complicated airflow characteristics of the prototype Low current driving capabilities of QBX modules
Resultant changes due to risks encountered Changes in project goals Faster project development
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Closing Summary
The main goals of this project are to: Provide the user a cost efficient heating and cooling
control of a multi-story building that is easy to use for technical and non-technical users
Introduce a smart module with wireless capability to independently control air flow in a home ventilation system