Department of Electrical and Computer Engineering

PDR PresentationWednesday October 17,

2012Reviewed by: Prof. Bardin & Prof. Gao

Department of Electrical and Computer Engineering

Team Supreme

Chris FinnCSE

Paulo LealEE

Tim MirabitoEE

Kevin OkiahEE

Advisor: Prof. Leonard

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What is the Problem?

• Energy conservation has a significant social & economic impact.

• It is hard to conserve energy because • Limited quantitative

data• Limited social

awareness• Limited residential

control

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How significant is the problem?

Growing Energy Consumption & Cost

Need To Radically Change Energy Paradigm

Increased energy conservation initiatives

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Context: Effect on Individuals

Give people a means to monitor and control the electrical devices within their households.

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Context: Effect on Groups

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Requirements Analysis: Specifications

Energy monitoring system for household Allow users to control power and individual

appliances Safe for users

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Requirements Analysis: Inputs and Outputs

Inputs:120V at 60Hz or 240V at 60HzDisplay device

Computer, tablet, etc.

Wi-Fi networkLimited User Information

Outputs:Electrical Usage DataInformed PeopleSocial Revolution

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Special Requirements

• Must produce a safe product.

• Easy to use.

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Design Alternatives

Watts up? PRO®

Home implementation

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Our Solution: The Power Pi

Increase consumer awareness and control by monitoring and networking electrical devices within a residential household

Allow users to turn On/Off power to outlets

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Our Solution: Block Diagram

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Our Solution: Communication Flow

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Block 1: Wattmeter

Requirements:Primary:

• Measures Wattage• Outputs Data

Secondary:• Measures other

electrical information• Amps• Volts• Peak Voltage• Power Factor• Line Frequency

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Block 1: Wattmeter Work Plan

Modified Kill-A-Watt® Meter

Using the Kill-A-Watt® model P4400 (~$20) we can modify the breadboard to incorporate a form of data output including the following:

Wireless Transmission USB Output Serial Output

Add support for 240V 60Hz

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Block 2: Wireless Communication

Requirements:Model A

• Receive Model B data• Wi-Fi connection

Model B• Read in Wattmeter data• Transmit data to base hub

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Block 2: Wireless Communication Work Plan

Model AReceive Model B dataConnect Raspberry Pi to Wi-Fi network for server functionality

Model BInterface a wireless module with Wattmeter outputConnect to central hubTransmit data to hub

JeeNode

XBee

Wi-Fi Dongle

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Block 3: Raspberry Pi

Requirements:Handle Wattmeter data outputHandle transmitted data from Model A unitsDrives switching circuitTransmit Ethernet packets containing acquired dataHost web server

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Block 3: Raspberry Pi Work Plan

Raspberry PiWattmeter Data

Current Outlet

Ethernet Packet

Outlet ID; Wattage data

Outlet ID; Wattage data

Ethernet Packet Payload:

Slave

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Block 3: Raspberry Pi Work Plan

Raspberry PiWattmeter Data

Current Outlet

Ethernet Packets

Master (Web Server)

Receives outputs of other Model B units

Web server functionality

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Block 4: Electrical Line Communication

Requirements:Bidirectional communication over household electrical wires

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Block 4: Electrical Line Communication Work Plan

HomePlug®

Networking over existing home electrical wiringData rate: 200Mbps-500MbpsPrice: $40/each

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Block 5: Model A Enclosure

A surge protector shall be used as the enclosure for model A units

Contains: Switching circuit Wattmeter Raspberry Pi Wireless comm.

modules HomePlug®

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Block 6: User Interface

Every time users get

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Block 6: User Interface

a

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Block 6: User Interface

Utility Bill

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Block 6: User Interface

it serves a

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Block 6: User Interface

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Block 6: User Interface

Trying to Understand your utility bill

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Block 6: User Interface

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Block 6: User Interface

We propose a revolutionary User Interface

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Block 6: User Interface

Requirements:Easy To UseEasy To UnderstandAndroid CompatibleWindows Compatible

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Block 6: User Interface

Network

Interface

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MDR Deliverables

Block 1:Acquire Kill-A-Watt®

Block 2:Establish connections

Block 3:Basic webserverReceive data

Block 4:Acquire HomePlug®

Block 5:Acquire surge protector

Block 6:Simple user interface

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Questions