Mentor: Dr. Rene Cruz Sponsor: Cubic Transportation Systems, Inc. Jason Kim, Richard Lambert, Helen Zheng, and Lorne Semrau

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Gantt Chart Week 8 Accomplishments Project Overview Prototype Results Modifications to Android Code GUI Implementation Research for Gyroscope Week 9 Agenda

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Modified code for a more precise integral (Helen) Wrote a code to implement moving average for the integral (Jason and Lorne) Researched and implemented prototype GUI (Jason and Richard) Began process of implementing gyroscope into code (Richard and Lorne) Constructed code to correct frame of reference (Lorne)

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Using sensors to perform dead-reckoning calculations Practical accuracy Positional feedback ◦ Data ◦ Graphical

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Minimal power costs

•Calculated distances are all less than actual distance •Error increases with distance Trial 1

Trial 2

Trail 3

Start

0.021m

0.018m

0.025m

End

0.101m

0.103m

0.084m

Distance Calculated

0.8m

0.85m

0.059m

Actual Distance

0.95m

0.975m

0.06m

Error

15.8%

12.8%

1.67%

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Previous integral ◦ v=v+ax*dt

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New integral ◦ v=v+(ax+ax0)/2*dt

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Moving average as an attempt to remove noise ◦ v=v+(a0+a1+a2)/3*dt ◦ Smoothes out acceleration

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Results and problems: ◦ Distance in new code increases despite a stable android device ◦ Data on device screen lags a great deal

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Reasoning: ◦ New code might add pick up noise that “produce” distance ◦ Extra code might need greater processing power

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Continue graphical implementation Continue controlled testing Start evaluating errors in code Implement rotation into code

Questions?

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http://www.google.com/url?source=imglanding&ct=img&q=http:// cdn.bestandroidtricks.com/wpcontent/uploads/2012/08/GPS2.jpg&sa=X&ei=zkj7UMfCuWujAKu0YHoDw&ved=0CAsQ8wc&usg=AFQjCNFc4NfQnyDkXoGtj 7NlMwPmbio9AQ http://developer.android.com/

http://developer.android.com/reference/android/hardware/p ackage-summary.html http://www.ibm.com/developerworks/opensource/library/os -android-sensor/#download http://developer.android.com/guide/components/index.html http://www.androidguys.com/2011/10/21/detailed-innerspecs-of-the-galaxy-nexus-become-available/ http://cnx.org/content/m38795/1.1/PG10C2_029_1.png http://upload.wikimedia.org/wikipedia/commons/thumb/3/ 35/Gyroscope_wheel-text.png/200px-Gyroscope_wheeltext.png