EcoCar User Interface Mid-Semester Presentation Senior Design I March 1, 2012

Design Team Sam Knight Computer Engineer Dbus Programming CAN Bus Programming Lukas Cox Electrical Engineer Dictionary Training Physical Interfacing Adam Johns Computer Engineer CAN Bus Programming Alternatives Research Renz Santos Computer Engineer Recognition Programming Dictionary Training Dr. Marshall Molen Advisor

Contents Problem and Solution System Overview Technical and Practical Constraints Software Design Choices Hardware Design Choices Progress and Timeline References

Problem and Solution

Problem The increasing technology in vehicles today unfortunately increases the amount of danger to drivers and passengers alike. “Driver distraction is a leading cause of crashes, although the exact figures are difficult to gauge because of the unreliability of the data” [1].

Solution EcoCar User Interface – Allows car’s infotainment center to be controlled by voice – Helps lower the amount of attention needed to run modules on car

System Overview Microphone CAN Bus Computer Voice Recognition Control Overview, Radio, Media, GPS, Diagnostic Modules Projector

Technical and Practical Constraints

Technical Constraints NameDescription AccuracyThe system must correctly identify spoken commands with 90% accuracy. Latency The EUI must acknowledge commands within 250ms. Compatibility The system must run on Freescale SABRE platform computer. Communication The EUI must communicate with CAN bus. Vocabulary The system must recognize 12 voice commands

Practical Constraints TypeNameDescription ManufacturabilitySize The EUI must fit below the passenger seat and not obstruct the driver. SustainabilityDurabilityThe system must be able to withstand the vibrations of normal driving conditions.

Manufacturability Fit below passenger seat Microphone < 4”x2”x2” Projector < 1” depth [2]

Sustainability No short term problems Works as long as hardware does not fail Withstand normal car vibrations

Software Design Choices

Voice Recognition Software TypeTime to ImplementDifficulty of Implementation Choice Open Source Custom (DIY)

Voice Recognition Software LibraryLanguageAccuracySupport ToolsChoice SphinxJavaHigh ShoutC++N/A JuliusCMedium

Voice Recognition Software EUI Version 0.1

Dictionary TypeSizeSpeedEase of Integration Choice Preset Custom (DIY)

Dictionary WordPhoneme ECOCARIY K OW K AA R RADIOR EY D IY OW MEDIAM IY D IY AH GPSJH IY P IY S OVERVIEWOW V ER V Y UW DIAGNOSTICSD AY AH G N AA S T IH K S

Program Execution TypeEase of Integration Recognition Speed Display SpeedChoice External Program Thread

Hardware Design Choices

CAN Bus ConnectionDescriptionChoice EthernetRoute CAN Bus traffic over Ethernet through the gauge cluster USBUse CAN-to-USB interface to directly connect to the CAN Bus

Microphone TypeDurabilityRecording Clarity SizeConnectionChoice CondenserSmall3.5 mm DynamicMedium3.5 mm RibbonLargeXLR [3], [4], [5]

Projector TypePower Consumption LumensWeight (lbs)Choice LCDMedium DLPHigh LaserLow0.25 – 0.4

Progress and Timeline

Timeline JanuaryFebruaryMarchApril Researching Programming Ordering Parts Prototyping Debugging/ Fine Tuning

The Interface

Attaining Hardware MicroVision donated a projector – Thanks! [2]

References [1] (2012, February 22). “Music Related Car Crashes,” in Car Accidents [Online]. Available: car-accidents-causes.htmlhttp:// car-accidents-causes.html [2] Picture (2012, February 21). “Pico Projector,” in MicroVision [Online]. Available: [3] Picture (2012, February 22). “Electret Condenser Stereo Microphone,” in Sony [Online]. Available: 1&partNumber=ECMDS70P 1&partNumber=ECMDS70P [4] Picture (2012, February 22). “Audio-Technica ATR-1100 Unidirectional Dynamic Vocal/Instrument Microphone,” in Amazon [Online]. Available: Microphone/dp/B002HJ61PK/ref=sr_1_3?ie=UTF8&qid= &sr=8-3 Microphone/dp/B002HJ61PK/ref=sr_1_3?ie=UTF8&qid= &sr=8-3 [5] Picture (2012, February 22). “Nady Introduces New Active Ribbon Mic,” in Nady’s Press Releases [Online]. Available:

EcoCar User Interface Mid-Semester Presentation Senior Design I March 1, 2012