Transcript Mirror Mate Group 9

Group 9
Jake Hochstadt EE
Matt Simons EE
Jerome Yearwood EE
Ryan Moreland CpE
Goals
 Emergency Vehicle Alerts via an already existing
system
 Safety in School Zones and Construction Zones
 Navigation Directions
 Driver and Pedestrian safety
MirrorMate in a Nutshell
Display and Microcontroller
Jerome Yearwood
LCD Display
 ez-LCD-301
 2.6” TFT LCD color display
 400x240 resolution
 4Mbytes flash memory
 3.3V operating voltage
 Programs in ASCII
 Serial TTL interface
MirrorMate
Display Color
RED
Description
Emergency Vehicle is approaching
YELLOW
The vehicle is approaching a school zone that has
an altered speed limit.
ORANGE
The vehicle is approaching a construction zone that
has an altered speed limit.
BLUE
The vehicle is approaching a special event zone that
has an altered speed limit.
PURPLE
The vehicle is approaching an accident scene that
has an altered speed limit.
LCD TTL Serial Interface
Widgets
BUTTON {id} {X} {Y} {Width} {Height} {Options} {Align} {Radius} {Theme} {StringID}
STRING 0 ON
BUTTON 1 10 10 100 100 1 0 10 2 0
Microcontroller (PIC18F26K22)
 Operating voltage
 VDD =1.8 to 5.5V
 Operating at 3.3V
 Program memory flash 64KB
 16 MHz precision internal oscillator
 Operating at 64mHz using PLL
 2 EUSART ports
 Utilizing TTL RS232
 GPIO (I2C interfacing)
 Analog to digital converters
 16 bit timer0
Infrared Systems
Matt Simons
What is Opticom?
 Opticom is a traffic light
2 ft.
preemption system currently used
by emergency vehicles to quickly
maneuver intersections
 Utilizes a powerful IR beacon
mounted on the emergency
vehicle
 IR sensors are mounted on
4 in.
the traffic lights
 14Hz frequency, newer
systems feature
authentication
Reduced speed zone beacon
 Placed in construction zones, school
zones, accident scenes or anywhere
a driving hazard exists
 User configurable via buttons and
seven segment displays
 Features alerts for school zones,
construction zones, accident scenes,
and special events.
Beacon details
 Utilizes peak wavelength of
950nm at 38kHz, High
power emitters
 Encodes information into
RC-5 similar protocol
 50 high power emitters
 6VDC power
MirrorMate IR receiver
 Two different frequency receivers to accommodate the Opticom
system (14Hz) and the reduced speed zone beacon (38kHz)
 The 14Hz signal will be detected via phototransistors, schmitt
triggers, and firmware
 The 38kHz carrier wave is removed from the IR signal via integrated
IR receivers. The data is interpreted by the MCU
 Four directional receivers
located in the bottom of the
mirror determine direction
MirrorMate Subsystems
Jake Hochstadt
Bluetooth Hardware
 Current Requirements:
 8mA – 40mA
 Voltage Requirements:
 3 - 4.2 V
 Operates at 3.3V
 Benefits
 Inexpensive
 Serial Interface
 Ease of use
HC-05 Bluetooth Serial Module
Compass
MAG 3110
• Magnetometer
Breakout Board
• Triple Axis
• Voltage Requirements:
•
1.95V to 3.6V
• Operates at 3.3V
• I2C interface
13.5mm
Temperature sensor MCP9701
• Voltage Requirements:
• 3.1V to 5.5V
• Operating at 3.3V
• Current Requirements:
• 6uA
• Temperature Range
• -40°C to +125°C
• Analog Interface
• Ease of Use
Sensor Transfer Function
Android Development Phones
Motorola Photon 4g
Motorola Defy
 Android (2.3)
 Android (2.2)
 Bluetooth: v2.1
 Bluetooth: v2.1
 Screen Size: 4.3 inches
 Screen Size: 3.7 inches
Android Application
Ryan Moreland
MirrorMate Application Flowchart
MirrorMate
Title
Bluetooth
Connectivity
Bluetooth
Connectivity
Bluetooth
Connection
Main
Application
Local Map
Directions
Request
Direction
Confirmation
Calculation
Exit
Directions
List
Android Development
 Application written in Java for Android version 2.3.4
(Gingerbread)
 Forward compatible with all newer Android versions
 Android holds approximately 75% of the U.S. market
share
Android Development
 Written utilizing the Google Distance Matrix API
 Google Maps JavaScript API
 Google Maps Android API
 Android Bluetooth API
Power
 MirrorMate will operate on any standard 12V automotive charging
system with provided adapter.
 MirrorMate requires 3.3V for all components. This voltage will be
created by a simple power supply consisting of a commercially
available voltage regulator. (LM1085)
 Construction zone beacon requires 5V, it will use multiple LM1084
regulators to power the microcontroller and the large current
requirements of the emitters.
 Ensures constant voltage for emitters
Budget and Financing
 $686.46 spent on the MirrorMate system
 Assistance from family members
 Funded purchase of LCD ($177.00)
 $509.46 funded by group members
Budget
Item
Description
Price
Mirror Hardware
Assembly
Hardware and materials used only in
mirror assembly
$265.92
Beacon Hardware
Assembly
Hardware and materials used only in
beacon assembly
$166.87
Electrical Components
Components used throughout the
project and for testing
$121.73
PCB’s
Cost of MirrorMate and Beacon PCB
$104.39
Misc.
Misc. costs (RMA shipping, unused
parts)
$27.64
Android OS Device
Motorola Photon 4G, Motorola Defy
FREE
TOTAL:
$686.46
Testing
 2 different types of LEDs were tested to determine optimal beam
width to maximize the area of effect of the signal
 2 TSOP types were compared to determine which would produce
a better signal especially in a IR-noisy environment
 Maximum range for the beacon signal to be detected by the
mirror in optimal conditions was 950 feet.
 Compass headings were verified as correct every 10 degrees
Challenges and Lessons Learned
 LCD is difficult to see in daylight
 IR range is limited in intense daylight
 Power supplies need improvement
Questions