Clean Air Project:Team Big Green SpaceGasm

Final PresentationHillary Beltran, Edward

Crawford, Nicole Harris, Edward Lowe, Emily Proano, and Kevin

Wong

December 2, 2010

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

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Design Overview Three Sensors: CO, CO2, and Methane Arduino and MicroSD Shield Required Components

Camera, Hobo, Heater, andBatteries

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Functional Block Diagram

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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

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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

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Results and Analysis HOBO temperature data:

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Images from Camera

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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

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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

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/*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 LibrarySd2Card 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;

int sensorValueCO = 0;int sensorValueCH = 0;int sensorValueCO2 = 0;String CO;String CH;String CO2;

....

char name[] = "BGSGfinaldata1.txt";

Final Code Used on Launch Day

char name[] = "test1.txt";

Correct Code That Will Be Used Next Launch

=BAD

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

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Appendix

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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

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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

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Requirements Flow Down: Level 016

Number Derivation Description Compliance

1 M.S.Payload must ascend to an altitude of approximately 30.5 kilometers with a balloon provided by the Edge of Space Sciences

Payload reached an altitude of approximately 30.3 kilometers

2 M.S. Payload must collect and store science data related to the mission objective (Please see failure analysis)

3 M.S.The payload must carry an active heater system, keeping the internal temperature of the payload above -10°C

(Please HOBO data)

4 M.S. The payload must be constructed from foam core The payload was constructed from foam core.

5 M.S.The total mass of the payload must not exceed 850 grams and the budget of the project must not exceed three-hundred dollars.

The payload had a final weight of 782 grams and cost $223.83.

6 M.S. The payload must allow for a HOBO H08-004-02 and the provided external temperature cable

The payload included the HOBO H08-004-02 and the provided external temperature cable

7 M.S. The payload must allow for a Canon A570IS Digital Camera with two AA lithium batteries

The payload included the Canon A570IS Digital Camera with two AA lithium batteries

8 M.S.The payload must have contact information written on the external of the payload, alongside an United States flag

The payload had contact information written on the external of the payload, alongside an United States flag

9 M.S. The team will be ready to launch on November 6, 2010, at Windsor, Colorado, at 6:50 AM.

The Gateway to Space class launched on November 6, 2010, at Windsor, Colorado, at 7:40 AM

10 M.S. The team shall adhere to all safety procedures outlined in the proposal

All safety procedures have been followed

Requirements Flow Down: Level 117

Number Derivation Description

1 O1 Payload must remain attached to the flight string during the mission2 O7 The payload must be functional, retrievable, and capable of flying multiple times.

3 O2 The payload will carry carbon monoxide, carbon dioxide, and methane gas sensors to record the concentrations of each gas at different altitudes

4 O5 The entire payload, including all electrical components and structural materials, will weigh 781 grams

5 O6 The HOBO H08-004-02 shall measure and record measurements of internal temperature and the provided external temperature cable will record external temperatures during the mission.

6 O7 A Canon A570IS Digital Camera will take and store images during the flight.

7 O2 Program the Arduino microcontroller with the integrated development environment using the Java programming language

8a O2 Interface the carbon monoxide gas sensor to the Arduino microcontroller8b O2 Interface the carbon dioxide gas sensor to the Arduino microcontroller8c O2 Interface the methane gas sensor to the Arduino microcontroller

8d O2Test the functionality of the gas sensors individually and then test the functionality of the sensors integrated together on the Arduino microcontroller by placing the sensors behind the exhaust pipe of a running automobile that belongs to a member of the team.

8e O10 The team will adhere to all safety measures and protocol when testing system functionality.

9 O2, O3 Provide the necessary power to each electrical component and ensure that the recorded data is being properly stored

10 O1, O2, O3, O4

Create a structure that can withstand the forces and extreme temperatures experienced during flight

11 O10 The team will have a functional and flight-ready payload to turn-in on check-in, November 5, 2010, and launch day, November 6, 2010.

Mass and Cost SummaryMaterials & Device Budgeted Cost Source Budgeted Weight

Structure Foam Core Provided Gateway 170g Insulation Provided Gateway 50g

Hardware Canon Camera Provided Gateway 220g HOBO Provided Gateway 30g Heater System Provided Gateway 100g Arduino (2) $59.90 SparkFun 10g ProtoBoard (2) Not Used $9.00 SparkFun N/A

MircoSD Shield $14.95 SparkFun 10g Methane Gas Sensor (2) $9.90 Sparkfun 5g

CO2 Gas Sensor (2) $33.98 Parallax 5g CO Gas Sensor (2) $9.90 SparkFun 5g Wiring and Switches Provided Gateway 15g Various small electronics $19.59 10g

1GB MicroSD $10 Sparkfun 2g Batteries $43.75 Safeway 150g Dry Ice and Cooler $17.92 King Soopers N/a

TOTAL $223.83 N/A 782g

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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