Transcript Arduino Project – pres 2

Arduino Project
Street Guardian
Alex Castan-Latham
John Garner
Rebecca Newton
User Scenario
Gantt Chart & Project Planning
Product Design
Specification
Street Guardian
Initial Ideas
Styling
Charging Point
Docking Station
 Buttons
 Made from a mixture of silicone and natural rubber.
 Durable enough to be pressed frequently and
withstand any friction encountered
 Pleasing to the eye and comfortable to press and feel
 Made from ABS due to its professional and attractive appearance
 Good durability
 Manufactured using injection moulding due to low labour costs
and colour flexibility
Docking Station
Body
Buttons
Push Button Set
Potentiometer
Induction Coil Set
Piezo Speaker
Charging Plate
Screen
Arduino Board
Bottom Panel
Technology Development
The product was originally going to use a colour sensor however
after a meeting with a technical specialist it was decided to switch
to using shape recognition
More Accurate with the Arduino
Safer for the User
Process – Technology Integration
Process - Technology Integration
• When it comes to technology integration the “Street Guardian” product works as follows:
• The Arduino system is programmed so that the CMU cam can recognise the “green man” symbol. (This is a one-off step that is only done
once)
• The wristband/bracelet is placed in a bowl-like charger that uses contactless charger technology
• The user checks if the bracelet is fully charged by pressing a button on the docking station. A voice will then pronounce “fully charged” or
“not fully charged” via a speaker built into the docking station
• Once the wristband is fully charged the user equips the wristband ready for use when required
• As the user approaches a traffic crossing screen, the user places the front of the wristband/bracelet towards the traffic screen. The CMU
cam reads and processes the shape in front of it using a lens (also detecting colour)
• A signal is sent to the vibration motor once the desired shape or shapes are recognised (in this instance the “green man”), causing the
vibration motor to vibrate which in turn alerts the user to cross
Design Development
One device that can be clipped onto other devices
Clip on attachment for a white stick
Wristband
Clip on lapel
Headband
Main Console
Top Panel
CMU CAM
Inductive Coil Set
NIMH Rechargeable
Battery
Filter
Structural Panel
Resistor
Vibration Motor
Back Panel
Console Housing
Technology – CMU Cam
 The CMU cam provides simple vision capabilities to small embedded systems such as the Arduino
 It is an intelligent sensor that is open source as well as programmable
 The CMU cam can carry out many different kinds of on-board, real-time vision processing tasks
such as colour detection and shape recognition
 The CMU cam can learns shapes/objects that you teach it,
outputs what it detects 50 times per second and
communicates via one of several interfaces
 CMU Cam will detect and recognise the green man
Technology – Vibration Motor
 The vibration motor will provide the capability to indicate to the wearer when a status has
changed
 The vibration motor possesses a 2-3.6V operating range
 The vibration motor will come into use when the green
man has appeared
Technology - Inductive Coil Set
 The induction coil set consists of a circuit board, an induction
coil and wires
 Including an induction coil set will allow the portable device (in this case a bracelet/wristband) to
be charged wirelessly
 Uses an electromagnetic field to transfer energy between two objects
 The energy is directed through an inductive coupling to an electrical device, meaning that it can
then use that energy to charge batteries or run the device
 Rechargeable NIMH batteries will also be included within the portable bracelet
Wristband
Wrist Strap
 Made from vulcanised natural rubber
 Durable
 Aesthetically pleasing
 Comfortable to wear
Device Slot
 Device slot made from ABS due to its stylish and attractive look
 High impact resistance and toughness
 Will be injection moulded due to fast production and colour
flexibility
Small
Large
Alternative Designs
White Stick Attachment
Stainless Steel
Clip on Attachment
Steel
High Impact Polystyrene
User Interaction
Using materials and senses to help the user navigate their way around
the devices
Vibration
Sound
Textured
Rubber
References
http://www.cmucam.org/.
https://www.sparkfun.com/products/8449
http://data.energizer.com/PDFs/nickelmetalhydride_appman.pdf
http://www.avplastics.co.uk/advantages-and-disadvantages-ofinjection-moulding
http://www.avplastics.co.uk/advantages-and-disadvantages-ofinjection-moulding