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Clean Air Project: Team Big Green SpaceGasm Final Presentation

Clean Air Project: Team Big Green SpaceGasm Final Presentation. Hillary Beltran, Edward Crawford, Nicole Harris, Edward Lowe, Emily Proano , and Kevin Wong December 2, 2010. Mission Overview .

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Clean Air Project: Team Big Green SpaceGasm Final Presentation

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  1. Clean Air Project:Team Big Green SpaceGasmFinal Presentation Hillary Beltran, Edward Crawford, Nicole Harris, Edward Lowe, Emily Proano, and Kevin Wong December 2, 2010

  2. Mission Overview • Mission objective: Take measurements of the concentrations of carbon monoxide, carbon dioxide, and methane gases • Purpose of Mission: The team’s interest in the quality of air and changes that were recently experienced over the past few years • Hypothesis: Concentrations have increased during the course of the year

  3. Design Overview • Three Sensors: CO, CO2, and Methane • Arduinoand MicroSD Shield • Required Components • Camera, Hobo, Heater, and Batteries

  4. Functional Block Diagram

  5. Results and Analysis • microSD memory card failed to store data due to a simple error in code • Unable to compare predicted to actual data • Colorado Department of Public Health and Environment • Does not provide data on carbon dioxide and methane gases as initially expected • Team did not closely study what the department did or did not provide • Data provided for carbon monoxide is not significant • Online archived data dates to March 2008

  6. Results and Analysis • Team able to show expected increase in at least one gas: carbon dioxide • Shortfall: Readings taken from Mauna Loa Observatory in Hawaii

  7. Results and Analysis • HOBO temperature data:

  8. Images from Camera

  9. Flight Overview • Sensors were functional but could not store data on microSD memory card • Camera took images but memory card filled about halfway through the flight • HOBO successful took and stored internal and external temperatures and relative humidity • Heater system function (minimum internal temperature: -2.90°C) • Structure suffered minimal damages

  10. Failure Analysis • Not structural error • The structural suffered minimal damages • Internal components suffered no damages • Not electrical error • All the connections were present • Failure rooted in software

  11. /* Big Green SpaceGasm Java Code to be uploaded to Arduino */ //Add the SdFat Libraries #include <SdFat.h> #include <SdFatUtil.h> #include <ctype.h> //Create the variables to be used by SdFat Library Sd2Card card; SdVolume volume; SdFile root; SdFile file; char name[] = "BGSGfinaldata1.txt"; //Create an array that contains the name of our file. char contents[256]; //This will be a data buffer for writing contents to the file. char in_char=0; int index=0; //Index will keep track of our position within the contents buffer. String inin; intsensorValueCO = 0; intsensorValueCH = 0; int sensorValueCO2 = 0; String CO; String CH; String CO2; .... char name[] = "BGSGfinaldata1.txt"; Final Code Used on Launch Day =BAD Correct Code That Will Be Used Next Launch char name[] = "test1.txt";

  12. Conclusion • Data from external sources remain inconclusive • However, learned much from our failures • Now able to store the data that was recorded during flight • Find more reliable external source with which to compare our data • Re-flight in April 2011 highly anticipated and will yield conclusive data

  13. Appendix

  14. Lessons Learned • Carbon dioxide sensor short circuited due to too high of voltage/current • Camera should take images over longer time intervals • Conduct more system tests, namely for sensors and software • Ensure sensors taking data • Data being stored on microSD card and is retrievable

  15. Flight Readiness • Source of error has been traced to the code • Error was repeated with various tests done to affirm the source of error lay with code • Code rewritten and error solved • Structure does not need to be mended • For re-flight, new batteries with Velcro and a new CO2 sensor will be needed • Must be stored in dry, cool area

  16. Requirements Flow Down: Level 0

  17. Requirements Flow Down: Level 1

  18. Mass and Cost Summary

  19. Message to Next Semester • Course is challenging, but an invaluable and exciting learning experience • Communication, among others, is crucial • Subsystems can have own timetable • During full systems testing, each subsystem must be functional • If not, testing cannot continue until addressed • Time is not an ally • K.I.S.S. model – Keep It Simple Stupid • Given a measure of freedom • Remember constraints on costs, weight, and time

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