Amrinder Chawla, Anurag Kadasne, Saurabh Pandey, Enkuang Daniel
Wang, Gowtham Tamilselvan, Robert Kyle Brown ECE 4007 L03: Prof.
Erick Maxwell 7 th December, 2010
Slide 2
Project Overview Design and Cost Objectives Hardware and
Software Results Challenges Schedule and Future Work Project
Demonstration Agenda
Slide 3
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
Proposed and Actual Design Safety Kit Gas Mask CO Sensor Camera
eBox
Slide 8
Front View of Gasbot iRobot eBox CO Sensor Camera
Slide 9
Project Costs
Slide 10
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
Slide 11
Windows CE 6.0 Learning challenges Failed hard disk TA and Dr.
Hamblen helped eBox OS
Slide 12
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
Slide 13
Camera drivers were not compatible initially When it started
working, the camera broke (internal circuitry broke off) New camera
and compatible software Camera Integration
Slide 14
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
Slide 15
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
Slide 16
Transferring Data from Sensor to mbed
Slide 17
17 PPM Plot
Slide 18
Equation Used to Generate PPM Values
Slide 19
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
Slide 20
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
Slide 21
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
Slide 22
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
Slide 23
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
Slide 24
Problems and Solutions
Slide 25
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
Slide 26
More toxic gas sensors More accurate sensor Different testing
modules Rotating platform for camera Netbook instead of eBox Faster
Car Future Work