White Paper Presentation

pleasanthopebrothersElectronics - Devices

Nov 2, 2013 (3 years and 11 months ago)

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EVIS

E
xpandable
V
ehicle
I
nformation
S
ystem


Team Manager: Matthew Johnston


Kurt Richardson


Jud Chilton


Cody Thurston

Introduction

Overview

Objectives


Research core technology OBDII


Create a Bluetooth
®

OBDII interface


Create a database to identify all check engine
codes


Use microcontroller to control the overall
system


Implement on a test vehicle


Build using modular design


Work Plan


Research


Design


Implementation


Test


Documentation


Research


OBDII


Bluetooth
®


Microcontroller


Database Creation


Display Technology

Design


Connect into OBDII Port



A circuit built by the team that contains
ELM3XX family of processor


The circuit will convert OBDII protocol to
RS232 communications


OBDII port is a 16 pin connector used to
connect to vehicle ECM



Design


Connect RS232 communication to
a Bluetooth
®

interface


A circuit built will allow data in RS232
format to be used by the Bluetooth
®

transceiver


The Bluetooth
®

transceiver will act as a
slave device on a piconet set up by the
master transceiver on the microcontroller

Design


Connect Bluetooth
®

to microcontroller


Bluetooth
®

transceiver circuit will allow data off
the transceiver to be used by the
microcontroller as input.


The transceiver on the microcontroller will act
as the master of the system piconet.


Data Communication will be bi
-
directional
between the Bluetooth
®
.


Design


Use microcontroller to access on
board computer and monitor DTC
codes


Access pre
-
programmed database to
analysis the trouble code


Output to LCD the cause of the engine light
and correct course of action to take


Implementation







Integrate OBDII circuit into test vehicle


Attempt Bluetooth
®

retrieval and transmission
of code


Microcontroller acceptance of Bluetooth
®

code


Analysis and processing of code performed
by the microcontroller


Integrate microcontroller with LCD interface




Test Plan


Test ELM3XX processor & circuit


Access on board computer with laptop using RS232


Test Bluetooth
®

communications


Each Bluetooth
®

circuit will connect to a piconet to
test network creation.


Make sure the Bluetooth
®

transceivers transmit data
in proper format.


Verify Bluetooth transceiver connection to the
microcontroller and ECM converter board.

Test Plan


Test Microcontroller independently


Use computer to simulate OBDII trouble
codes


Make sure database is accessed properly
and relates to the correct entry



Test Display


Hook microcontroller up to the display and
verify proper operation

Test Plan


Complete system testing


After final integration verify system
functionality


Test durability of all components during
normal driving conditions



Documentation


User’s Manual


System Specifications


Test Plan


System Design Document


Schematics


Installation Guide


White Paper


Quad Chart


Formal Technical Proposal

Resources


Microcontroller


LCD


ELM3XX


PCB


Bluetooth


Cigarette Adapter


Laptop


Vehicle


Test and Power Cables




Enclosures


Mounting Brackets


Storage Space


Office Space


Visual C++ Program


Wiring


OBDII Adapters


Test Equipment


Milestones


Completion of research stage


OBDII


Bluetooth
®


Design



Bluetooth
®

OBDII module


Main Console Unit


Milestones


Prototype


Bluetooth
®

OBDII module


Main Console Unit (microcontroller/LCD)


Functional User Interface


Communication


between the main unit and the module


between the main unit and the vehicle
computer, through the Bluetooth
®

OBDII
module


Deliverables


Main console unit


Bluetooth
®

OBDII module


Listed documents


Technical Merit

Technical Merit Factor

Weight

(maximum)

Applied

Weight

1

Contains a clearly described and completely understood technical
challenge

0.1

0.1

2

Contains a requirement for system integration

0.2

0.2

3

Contains a requirement for system testing

0.2

0.2

4

Contains a requirement for analysis

0.2

0.2

5

Contains hardware design, development and test

0.3

0.3

6

Contains software design, development and test

0.3

0.3

7

Contains a hardware fabrication requirement, typically a prototype

0.2

0.2

8

Contains a requirement for documentation other than the project report

0.2

0.2

9

Contains a requirement for intellectual property protection

0.1

0

Total

1.7

References


Graphics taken from:


Woman next to car


http://www.wanadoo.co.uk/images/editorial/generalarti

cle/money/insurance/motor
-
insurance_170.jpg


Check engine light


http://www.carcarecouncil.org/images/emission_contro

l/check_engine_light.jpg


ELM322

http://www.elmelectronics.com/DSheets/ELM322DS.p
df