SDMay06-08 Industrial Review Panel

SDMay06-08 Industrial Review Panel

Smart House Ventilation System

April, 25th 2006

SDMAY 06-08

Faculty Advisors

Dr. Zhao Zhang

Dr. Arun Somani

Client

National Instruments

Team members

Austin Kelling

Carson Junginger

Suwandi Chandra

Gerald Ahn

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

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

Acknowledgements

National Instruments Dr. Zhao Zhang Dr. Arun Somani Jason Boyd

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.

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.

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.

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.

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

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

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

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.

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

End Product and Other Deliverables

Host Computer GUI QBX Module with LabVIEW Embedded VI Prototype Housing User Manual

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)

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)

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

Research Activities

Major research areas LabVIEW state variables Prototype airflow control Current amplifying circuit Reed relay operation

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

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

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

Main Control of Host GUI

Floor 1 for Host Control GUI

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

Diagram of Host GUI

Housing Implementation

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

Prototype Testing

Resources & Schedule

Personal Effort

Austin Kelling

Carson Junginger

Suwandi Chandra

Gerald Ahn

147

103146

145

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

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

Schedules 1/2

Schedules 2/2

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

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.

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.

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.

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.

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

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

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

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

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