SDMay06-08 Design Review

SDMay06-08 Design Review

Home Smart Ventilation System

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 Detailed Description Example of Use 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

Project Overview

A system using miniature sensing and controlling nodes, to increase ease of use for common electronic devices and provide custom server managed operation of those devices.

Miniature sensor and processing nodes = QBX modules developed by National Instruments

Bluetooth communications for everything

QBX

By National Instruments

• Dimensions : 4 x 4 x 4 cm• Weight : 82g (2.9 Oz)• Modules:

• Bluetooth• MMC• Processor• RS232• Power• Extension

Detailed Description

Bluetooth - Wireless personal area network for short-range radio links between mobile computers, phones, and other portable devices

LabVIEW - Laboratory Virtual Instrument Engineering Workbench, a graphical programming language that used to program the QBX module

QBX - 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 implementation

Example of Use

Super Mom Scenario

It is another crazy morning with three kids. Super mom has to prepare each kid with their breakfast, lunch box, after school program items, and so on. Super mom also needs to check all the lights, TV, stereo. Time is limited. How can she do everything before taking the kids to school??

Wouldn’t she be really SUPER if she has a Bluetooth device that can control all of the devices at once!!

How our project will improve life

Time saving Efficient heating and cooling control Improved home security Ease the use of all QBX controlled devices Easy to use for both Technical and Non-

Technical users System Security

Why you need our system

It’s efficient and reliable It’s secure Saves you time Saves you money Allows for mass customization of home or small

office Uses existing technology to make your life easier

Problem Statement

Simplify control in the home or small office

Control different kinds of electrical devices

Affordable and easy to use for the user

System Outlook

This is a representation of how the system will be set up in a three-story house.

There are QBX modules connected to motors that control the vents on each level of the house.

When the temperature of one of the floors raises above or drops below the desired temperature, the QBX modules open the vents and turn on the appropriate temperature control device.

Operating Environment

Host Computer: Operating System: Windows XP and LabVIEW

Embedded. IOGear GBU311 Bluetooth adapter with range of 30ft. Remote desktop enabled

QBX module: Indoors with temperature between 32°F - 120°F. Rechargeable 3.6 V battery, and 110 V AC power.

Intended Users and Uses

Intended Users Able to use a basic windows operating system based

computer. Able to remote desktop into the host computer

Intended Uses Equalized temperature on all floors of a building Heating and Cooling of separate floors with an

advanced algorithm Remote control of temperature

Assumptions – 1/2

User Assumption:

User knows English in order to understand the user interface and manuals of the system.

User has a basic knowledge on how to operate personal computer.

User owns a computer with Windows XP operating system and Bluetooth adapter.

The host computer terminal can access by authorize users only.

User has a secure network which the server is connected to.

Assumptions – 2/2

System Assumption:

The system (including the server) is expected to run 24 hours.

The system will have a user-friendly graphical interface for the server.

QBX module should plug-in to AC power for power recharge and longer use

Modeling of ventilation control

Limitations

Need for a server computer running 24/7

Interference with Bluetooth communications

QBX module power dependencies

Data transfer rate fades at longer distances

System is customized for our prototype only

Benefits of our project

Cost efficient heating and cooling control of a multi-level building

Equal temperatures on all floors of a building Easy to use for both Technical and Non-

Technical users Remote control of temperature

Expected End-Product – 1/2

To have a GUI based LabVIEW program running on a host computer that can control one or more QBX module via Bluetooth.

To have uniquely customized QBX modules that control the airflow of the cooling and heating devices use.

Our system will be accessible through remote desktop access from anywhere that has an internet connection.

Expected End-Product and Deliverables – 2/2

A demonstration of the system consisting three QBX modules place inside each of three stack of plexiglass boxes that has heating and cooling element in two of the boxes, and a host computer.

A reference manual containing how to set up each QBX module, breadboard for power control, mobile devices and how to operate the host computer and use the GUI.

A collection of the VIs and sub-VIs for operating our system

Design Activity

A step-by-step list of what will occur when the system is activated. On the host computer:

The user will set the desired temperature control device (A/C or Heat). The user will then set the desired temperature that the house should stay at.

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 the same temperature.

This system will eliminate large temperature differences between the floors of multi-story houses.

Technology Considerations

SHT11 Temperature Sensor This sensor comes fully calibrated

and offers long term stability at a low cost.

Bluetooth This technology is used because the QBX modules

are equipped with Bluetooth communication modules.

Technology Considerations

Labview Embedded This software was given to us by National

Instruments in order to communicate with the QBX modules.

Stepper Motors The most practical motor to use for vent control.

QBX Voltage Module This will be used to control the stepper motors and

turn the temperature control devices on or off.

Technology Considerations

Relays The system will use relays connected to the QBX

voltage module in order to turn the different devices on or off.

Working Model The team will construct a model to demonstrate

how the system would work in an actual home using these technologies.

Working Model

The model will be constructed of three shoebox sized compartments that will represent the floors of a house.

The front and rear of the model will be made from a clear material in order to see inside.

This model will demonstrate how the system works just as it would in an actual three-story house.

Implementation Activities

Interface – Host computer

VIs Host Computer QBX modules

Hardware Setup – Relay & Stepper Motor

Host Computer Interface

Host Computer VI

QBX Module VI

Personal Effort Requirement

Other Resources Requirement

Item Team Hours Other Hours Cost

Project Poster 14 2 $70.00

SHT11 Sensor 0 0 $43.84

Bluetooth Adapter 0 0 $52.00

Breadboard 0 0 Donated

QBX 0 0 Donated

Total 14 2 $165.84

Financial Requirement

Item W/O Labor With Labor

Parts/Materials

Project Poster $70.00 $70.00

SHT11 Sensor $43.84 $43.84

Bluetooth Adapter $52.00 $52.00

Subtotal $165.84 $165.84

Labor ($11.00/hour)

Carson Junginger $1,320.00

Austin Kelling $1,375.00

Gerald Ahn $1,419.00

Suwandi Chandra $1,287.00

Subtotal $5401.00

Total $165.84 $5,566.84

Schedule

Project Evaluation

Project Definition Fully Met

Technology Consideration Fully Met

End-Product Design Partially Met

End-Product Implementation Partially Met

End-Product Testing Partially Met

End-Product Documentation Not Attempted

End-Product Demonstration Not Attempted

Project Deliverables Partially Met

Commercialization

There are no commercialization consideration for our project.

Proof of our concept of the system in instead environmentally friendly.

Future Recommendation

Extension of the control devices to other electronic devices such as: TV, Radio, and Lights, etc.

Extend the controlling by using Bluetooth devices to control all the electronic devices.

More specific profile setting for specific user for all the devices.

Risk Management

Anticipated potential risks Loss of team member Loss of code

Unanticipated risks encountered Loss of documentation Constraints on usage of resources

Resultant changes due to risks encountered Changes in project goals Slow development

Lesson Learned

What went well? Good advisory meetings Good team communication

What did not go well? Defining the project Slow early development Bluetooth Connectivity

Lesson Learned Cont’d

Technical knowledge gained LabVIEW programming Experience with SHT11 sensor & Stepper motor Bluetooth Technology

Non-technical knowledge gained Project management skills Learned the importance of organizing project resources Learned the importance of meeting deadlines

Closing Summary

The goals of this project is to: Provide a user a cost efficient heating and cooling

control of a multi-level building that is easy to use for technical and non-technical users

Introduce a smart module with wireless capability to control air flows in home ventilation system

Thank You!!