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Amrinder Chawla, Anurag Kadasne, Saurabh Pandey, Enkuang Daniel Wang, Gowtham Tamilselvan, Robert Kyle Brown ECE 4007 L03: Prof. Erick Maxwell 7 th December, 2010

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Project Overview Design and Cost Objectives Hardware and Software Results Challenges Schedule and Future Work Project Demonstration Agenda

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Combines wireless robot navigation and live video Detects and provides feedback of CO concentration in ppm Allows emergency teams to respond to gas leaks Reduces human exposure to CO gas Provides relief materials to the affected Costs $142.98 Project Overview

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Gasbot Setup

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Remote Computer WebcamSafety Kit eBoxiRobot mbed microcontroller Parallax CO Sensor Gasbot Setup

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Design Objectives

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Proposed and Actual Design Safety Kit Gas Mask CO Sensor Camera eBox

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Front View of Gasbot iRobot eBox CO Sensor Camera

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Project Costs

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iRobots battery provides 16 V input voltage Input voltage stepped down to 5 V using 78HT305 regulator Stepped down voltage provides power to eBox Battery Pack

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Windows CE 6.0 Learning challenges Failed hard disk TA and Dr. Hamblen helped eBox OS

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Based on the work of Dr Hamblen Can control Robot using WASD keys and P&L for speed Keyboard based for easy operation Remote Control GUI

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Camera drivers were not compatible initially When it started working, the camera broke (internal circuitry broke off) New camera and compatible software Camera Integration

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Serial port receive data from CO sensor Character buffer View exported using a built-in OS feature. Export view feature: main factor for system choice Serial Port Integration/Exporting View

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CO Sensor and V R3 Value 15 V R3 increases as CO level increases V R3 is read from pin TP1 Value is transmitted to mbed microcontroller

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Transferring Data from Sensor to mbed

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17 PPM Plot

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Equation Used to Generate PPM Values

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Sending PPM Value to eBox Serial Breakout Board 19 Calculated PPM is sent from pin 28 Value to sent to eBox via serial breakout board

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Room temperature condition Set voltage of potentiometer R 4 & R 3 to approximately 0.8 V R 3 voltage divider (buffered output of sensor) R 4 threshold voltage Sensor Calibration

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Butane hair curler output varies from 50 ppm to few hundreds of ppm CO canister most accurate method, output ppm closely matches listed ppm (+/- 3 ppm) Butane lighter smaller range from 30 to 80 ppm Car exhaust pipe output fluctuates from 60 to 150 ppm Sensor Testing Methods

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CO canister is best method to measure accuracy When tested with other methods, the ppm value fluctuates Other methods only allow detection of change in ppm Result and Accuracy

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Safety Kit Designed to maximize space and functionality Used sign foam to build safety kit Used acrylic cover for the back Can hold a full size gas mask with filter and walkie-talkie

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Problems and Solutions

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Product Research eBox setup Microcontroller CO sensor iRobot Safety Kit Integration Wirelessly controlled robot Data transfer between user and robot Testing Finished Product Final presentation Project demonstration Final project report Schedule Late August Early September Mid September Mid November Late November Early December

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More toxic gas sensors More accurate sensor Different testing modules Rotating platform for camera Netbook instead of eBox Faster Car Future Work

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Questions?