EcoCar User Interface

Mid-Semester PresentationSenior Design IMarch 1, 2012

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

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 OverviewMicrophone CAN Bus

Computer

Voice Recognition Control

Overview, Radio, Media, GPS, Diagnostic Modules

Projector

Technical and Practical Constraints

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

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.

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 SoftwareType Time to Implement Difficulty of

ImplementationChoice

Open Source

Custom (DIY)

Voice Recognition SoftwareLibrary Language Accuracy Support Tools Choice

Sphinx Java High

Shout C++ N/A

Julius C Medium

Voice Recognition Software

EUI Version 0.1

DictionaryType Size Speed Ease of

IntegrationChoice

Preset

Custom (DIY)

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

Program ExecutionType Ease of

IntegrationRecognition Speed

Display Speed Choice

External Program

Thread

Hardware Design Choices

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

MicrophoneType Durability Recording

ClaritySize Connection Choice

Condenser Small 3.5 mm

Dynamic Medium 3.5 mm

Ribbon Large XLR

[3], [4], [5]

ProjectorType Power

ConsumptionLumens Weight (lbs) Choice

LCD Medium 5 - 16

DLP High 0.5 - 10

Laser Low 0.25 – 0.4

Progress and Timeline

TimelineJanuary February March April

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:

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

EcoCar User Interface

Mid-Semester PresentationSenior Design IMarch 1, 2012