ecocar user interface mid-semester presentation senior design i march 1, 2012
TRANSCRIPT
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EcoCar User Interface
Mid-Semester PresentationSenior Design IMarch 1, 2012
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Design Team
Sam KnightComputer Engineer
Dbus ProgrammingCAN Bus Programming
Lukas CoxElectrical Engineer
Dictionary TrainingPhysical Interfacing
Adam JohnsComputer Engineer
CAN Bus ProgrammingAlternatives Research
Renz SantosComputer Engineer
Recognition ProgrammingDictionary Training
Dr. Marshall MolenAdvisor
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Contents
• Problem and Solution• System Overview• Technical and Practical Constraints• Software Design Choices• Hardware Design Choices• Progress and Timeline• References
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Problem and Solution
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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].
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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
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System OverviewMicrophone CAN Bus
Computer
Voice Recognition Control
Overview, Radio, Media, GPS, Diagnostic Modules
Projector
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Technical and Practical Constraints
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Technical ConstraintsName Description
Accuracy The 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
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Practical ConstraintsType Name Description
Manufacturability Size The EUI must fit below the passenger seat and not obstruct the driver.
Sustainability Durability The system must be able to withstand the vibrations of normal driving conditions.
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Manufacturability
• Fit below passenger seat• Microphone < 4”x2”x2”• Projector < 1” depth
[2]
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Sustainability
• No short term problems• Works as long as hardware does not fail• Withstand normal car vibrations
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Software Design Choices
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Voice Recognition SoftwareType Time to Implement Difficulty of
ImplementationChoice
Open Source
Custom (DIY)
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Voice Recognition SoftwareLibrary Language Accuracy Support Tools Choice
Sphinx Java High
Shout C++ N/A
Julius C Medium
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Voice Recognition Software
EUI Version 0.1
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DictionaryType Size Speed Ease of
IntegrationChoice
Preset
Custom (DIY)
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DictionaryWord Phoneme
ECOCAR IY K OW K AA R
RADIO R EY D IY OW
MEDIA M IY D IY AH
GPS JH IY P IY S
OVERVIEW OW V ER V Y UW
DIAGNOSTICS D AY AH G N AA S T IH K S
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Program ExecutionType Ease of
IntegrationRecognition Speed
Display Speed Choice
External Program
Thread
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Hardware Design Choices
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CAN BusConnection Description Choice
Ethernet Route CAN Bus traffic over Ethernet through the gauge cluster
USB Use CAN-to-USB interface to directly connect to the CAN Bus
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MicrophoneType Durability Recording
ClaritySize Connection Choice
Condenser Small 3.5 mm
Dynamic Medium 3.5 mm
Ribbon Large XLR
[3], [4], [5]
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ProjectorType Power
ConsumptionLumens Weight (lbs) Choice
LCD Medium 5 - 16
DLP High 0.5 - 10
Laser Low 0.25 – 0.4
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Progress and Timeline
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TimelineJanuary February March April
Researching
Programming
Ordering Parts
Prototyping
Debugging/Fine Tuning
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The Interface
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Attaining Hardware
• MicroVision donated a projector – Thanks!
[2]
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References[1] (2012, February 22). “Music Related Car Crashes,” in Car Accidents [Online]. Available:
http://www.car-accidents.com/music-car-accidents-causes.html [2] Picture (2012, February 21). “Pico Projector,” in MicroVision [Online]. Available:
http://www.microvision.com/pico_projector_displays/index.html[3] Picture (2012, February 22). “Electret Condenser Stereo Microphone,” in Sony [Online]. Available:
http://store.sony.com/webapp/wcs/stores/servlet/ProductDisplay?catalogId=10551&storeId=10151&langId=-1&partNumber=ECMDS70P
[4] Picture (2012, February 22). “Audio-Technica ATR-1100 Unidirectional Dynamic Vocal/Instrument Microphone,” in Amazon [Online]. Available: http://www.amazon.com/Audio-Technica-ATR-1100-Unidirectional-Instrument-Microphone/dp/B002HJ61PK/ref=sr_1_3?ie=UTF8&qid=1329973321&sr=8-3
[5] Picture (2012, February 22). “Nady Introduces New Active Ribbon Mic,” in Nady’s Press Releases [Online]. Available: http://www.nady.com/pr_rsm8a.html
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EcoCar User Interface
Mid-Semester PresentationSenior Design IMarch 1, 2012