Electrical & Computer Engineering

Presentation by:Andrew FriedenMatthew Weydt

Nick SetzerTyler Dunn

CDR 2011 – Team Gong

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Presentation Overview

Main Goal Recap from last time Flow Diagrams Spending Gantt chart Demo

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Main Goal

To design and build a device that will determine whether it would be cost effective to install solar panels on a customer’s roof.

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Project Overview

Name: Self Sustaining Solar Sensor Uses Arduino microcontroller, GPRS transmitter,

analog light sensors and android application to track data

Self powered using its own solar panel Our device will give real time data, angle of

power optimization, and dollar value feedback to the customer

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Design (Pyranometer Array)

13 sensors Silicon Photodetectors Temperature sensor for solar efficiency

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Design Continued.

Pyranometer array on half sphere• Uses many sensors to measure irradiance• Irradiance is used to calculate electrical efficiency of

solar panels• Pyranometers act as control points to find an optimal

direction for solar panel

http://www.instesre.org/construction/pyranometer/pyranometer.htm

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Design Continued.

Application will have calculator to do most/all of the data processing• Energy calculations for electrical efficiency from

irradiance• Optimal direction algorithms

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Data Flow Diagram

Arduino Device

Micro Controller + SD card

GPRS Transmitter

TCP Packet with JSON encoded data

Android Device

Php script

MySql Database

Application pulls from Database

Interpolation Algorithm giving real time results to customer

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Arduino Device

Arduino Device

Micro Controller + SD card

GPRS Transmitter

TCP Packet with JSON encoded data

Android Device

Php script

MySql Database

Application pulls from Database

Interpolation Algorithm giving real time results to customer

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Transmission Phase

Arduino Device

Micro Controller + SD card

GPRS Transmitter

TCP Packet with JSON encoded data

Android Device

Php script

MySql Database

Application pulls from Database

Interpolation Algorithm giving real time results to customer

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Android Device

Arduino Device

Micro Controller + SD card

GPRS Transmitter

TCP Packet with JSON encoded data

Android Device

Php script

MySql Database

Application pulls from Database

Interpolation Algorithm giving real time results to customer

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Spending

Current spending total to date: ~$350 Money left to date:~$150 Estimate for production value for unit:~$100-

$150 Current market technology: 6-8 design hours,

digital image processing units (example Solmetric Suneye) ~$2000

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Gantt Chart

2/16/2012

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Arduino Demo

Periodic Wakeup and Sleeps Read and Write to sd-card Sample analog sensors

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Spline Interpolation

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Transmission Demo

GPRS• Initialize the connection to the T-Mobile access point• Open a single IP connection to westhostsite.com• Construct a TCP Packet• Send a HTTP Post to /sdp/sendjson.php

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Packet Image

Post Command

TCP Packet

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Android Demo

Query the database for sensor data Displays graphs of data

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How do we plan on demoing this?

Downloadable android application which we will also have on display

Sensor will real time update our phone and calculator

Users can see the power and money that could be saved by the ambient light in the room and a flashlight

Increase sensor and transmission rate for demo

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Requirements

Low Power, maximum of 5v peak operating with drawing no more than 2A from our power supply

Android Application for calculating best performance of static solar panel, graphically displaying sensor data and a good estimate to dollar value saved by a user on a monthly basis

A hardware device capable of processing and transmitting sensor data to the internet

A sampling and transmission cycle that consumes less power than can be recharged via our solar panel

A sensor array able to accurately sense light intensity of the sun in a potential spot for solar panels

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Project Management Andrew Frieden, CSE:

• Android Application development• Money saving, power saving and direction of optimal solar panel algorithms• Web Designer

Matthew Weydt, CSE:• PHP Web Server development• MySql Server development• Arduino programming• GPRS programming

Nick Setzer, EE:• Solar panel step down converter• Power supply system• Assist Arduino programming

Tyler Dunn, EE:• Sensor testing and Integration• Device construction• Power system design and testing• Assist Arduino and GPRS programming