Djordjijana Bura, Neftali Fierro, Yue Gong, Nishant Koshy, Mark Twomey

bendembarrassΗλεκτρονική - Συσκευές

2 Νοε 2013 (πριν από 3 χρόνια και 7 μήνες)

167 εμφανίσεις

Djordjijana Bura,
Neftali

Fierro
,
Yue

Gong,
Nishant

Koshy
, Mark
Twomey

Department of Electrical Engineering

Erik
Jonsson

School of Engineering & Computer Science

University of Texas at Dallas

Richardson, Texas 75083
-
0688, U.S.A.

dxb089000@utdallas.edu, tfierro@utdallas.edu, yxg073000@utdallas.edu, nak041000@utdallas.edu, mark2me@student.utdallas.edu

Project Goals:

Project Results:

Project Overview:

Project
Future Goals:




Modify the microcontroller and
LabView

code in order to interpret

the data from the ultrasound sensors and the accelerometer.



Design a space efficient PCB layout.



Design UI with two audible warning options.



Meet with people who are visually impaired.








Design 1


Implement our device with current technologies:

any Mobile Device, GPS, BTS,
GoogleMap
, etc.


Design 2


3
-
D orientation in space by

incorporating past movements

with current movements.




Horizon mapping tool to

provide them with feedback.


Design 3



Effect of the Hallway: Detect edges, width, or empty space of the hallway.



Hardware


Device Schematic Design and
Integration


Designed and simulated using Eagle.


Integrated
Arduino

board with sensors, switches.

Create PCB Layout


Layout designed with Eagle


Feature size: 60 mm x 30 mm


Two Layers of PCB Layout


Used LPKF
ProtoMat

PCB Milling Plotter


Components:


3 Ping))) ultrasound Sensors


Accelerometer and switch


3 Decoupling capacitors





Integration with a mobile device


Used
BlueGiga

WT11 Bluetooth module


to communicate with the mobile device


Software

Microcontroller Code


Used ATMEL Mega168 microcontroller


C code for programming the microcontroller


Compiled and uploaded the code using
Arduino

IDE


C code to control the fi ri ng of the sensors


LabView

Code


User fri endly GUI


Opti on between a tone system and voi ce system


Algori thm to compare the data from multi ple sensors



Data Collection and Testing


Data collected i n a narrow hallway


Data collected when approachi ng a door

Sensor

PCB

MCU

LabView

Mobile
Device

y = 5.4541x + 0.0822

0
2
4
6
8
10
12
0
0.5
1
1.5
2
D
i
s
t
a
n
c
e

(
m
)

Pulse Width (ms)

Distance vs. Pulse Width (ms)

Organization
:

Djordjijana

Bura

Neftali

Fierro


Yue

Gong



Nishant

Koshy


Mark
Twomey



-

LabView

coding

-

Field testing

-

Research

-

Hardware
development



-

Field testing

-

Data collection

-

Low power design
architect

-


Hardware
development

-

LabView

coding

-

Research

-

Software
development

-

Soldering


-

Microcontroller
programming


-

Field testing

-

Printed circuit
board development
for better aesthetics


-

Hardware
development


-

LabView

coding

-

Field testing

-

Microcontroller
programming

-

Hardware
development

Design:



Data collected by the sensors is used to help the visually impaired to navigate
easily.



Data collected by the
Ardruino

BT microcontroller for the three sensors are transmitted serially to the PDA for
computation.



The PDA using the
Labview

mobile module
conveys the distance of an
object by altering
the frequency and the
volume
a of tone based
on the distance or a voice command as preferred by the user.






Before


After

Mobile
Device

LabView

Algorithm

Emitter/ Receiver

Microcontroller

Bluetooth

Bluetooth

(Wireless

connection)

(Wired connection)