snow sentry tm the information contained herein is proprietary and confidential information of...
TRANSCRIPT
SNOW SENTRYTM
The information contained herein is proprietary and confidential information of Fortran Traffic Systems Limited.Copyright ©2010 Fortran Traffic Systems Limited. All rights reserved.
SNOW SENTRYTM
Problem Definition: LEDs Don’t Melt Snow
• Incandescent bulbs have traditionally been used for traffic signal indications
• Majority of the power from an incandescent bulb is emitted as heat
• LEDs – benefit is a significant reduction of the power/maintenance therefore less costs
•Reduced heat from LEDs is considered a major factor in snow and ice build-up during Winter
•Solution required to protect against visual impairment caused by snow and ice on traffic signals
The information contained herein is proprietary and confidential information of Fortran Traffic Systems Limited.Copyright ©2010 Fortran Traffic Systems Limited. All rights reserved.
SNOW SENTRYTM EVOLUTION
Approached by a major Canadian City to design a snow solution device prior to them commencing their LED program
Investigated the following:- Heater- Thermostat- Surface Coatings (Aircraft, Oil-based chemical, Rain-X, etc.) - Visors
SNOW SENTRYTM
The information contained herein is proprietary and confidential information of Fortran Traffic Systems Limited.Copyright ©2010 Fortran Traffic Systems Limited. All rights reserved.
SNOW SENTRYTM
PROPOSED SOLUTIONModel thermal characteristics of the incandescent signal:
- bulb type- input voltage / power- duty cycle- filament position & orientation
The information contained herein is proprietary and confidential information of Fortran Traffic Systems Limited.Copyright ©2010 Fortran Traffic Systems Limited. All rights reserved.
SNOW SENTRYTM
PROPOSED SOLUTION
The information contained herein is proprietary and confidential information of Fortran Traffic Systems Limited.Copyright ©2010 Fortran Traffic Systems Limited. All rights reserved.
SNOW SENTRYTM
PROPOSED SOLUTIONReviewed heater design alternatives with manufacturers
- Opacity- Watt density and total power- Material composition- Deformation- Cost- New signal/Retrofit signal
The information contained herein is proprietary and confidential information of Fortran Traffic Systems Limited.Copyright ©2010 Fortran Traffic Systems Limited. All rights reserved.
SNOW SENTRYTM
THE HEATERNone of the previous designs met all the requirements of our model
Designed an LED cap with a thermal film heater applied over the entire surface to melt/evaporate the snow and ice.
The information contained herein is proprietary and confidential information of Fortran Traffic Systems Limited.Copyright ©2010 Fortran Traffic Systems Limited. All rights reserved.
SNOW SENTRYTM
TEST RESULTSTested thermal film heater in Environmental Chamber and FieldCompared results with Incandescent Signal
The information contained herein is proprietary and confidential information of Fortran Traffic Systems Limited.Copyright ©2010 Fortran Traffic Systems Limited. All rights reserved.
Incandescent – TopHeater - Bottom
Heater
SNOW SENTRYTM
Field test results were suboptimalIdentified deficiencies and raised other issues
FIELD TRIALS
Tests in the chamber also revealed that the surface between lens and heater started to discolor with tiny bubbles
The information contained herein is proprietary and confidential information of Fortran Traffic Systems Limited.Copyright ©2010 Fortran Traffic Systems Limited. All rights reserved.
SNOW SENTRYTM
HEATER ISSUES- Unable to replicate the incandescent thermal model characteristics- Problems started to manifest
- Discoloration- Deformation - Material type and composition- MMU / Conflict Monitor compatibility - Thermal Hysteresis control- Separate/Alternate Power source for heater - Increased Power consumption- Extend payback period
The information contained herein is proprietary and confidential information of Fortran Traffic Systems Limited.Copyright ©2010 Fortran Traffic Systems Limited. All rights reserved.
K.I.S.S. Principal
Further analysis of the test data
One problem source is the “ledge” formed by the visor’s bottom lip
Prevent buildup using a clear convex shield that protrudes past the bottom lip
BACK TO THE DRAWING BOARD
The information contained herein is proprietary and confidential information of Fortran Traffic Systems Limited.Copyright ©2010 Fortran Traffic Systems Limited. All rights reserved.
SNOW SENTRYTM
SNOW SENTRYTM
A clear geometrically designed shield would guard the LED module from snow and ice; thus the name “SNOW SENTRYTM”
THE SOLUTION
The information contained herein is proprietary and confidential information of Fortran Traffic Systems Limited.Copyright ©2010 Fortran Traffic Systems Limited. All rights reserved.
SNOW SENTRYTM
Designed for multiple LED brandsImpact Resistant Acrylic UV Stabilized Improves visibilityZero PowerLow MaintenanceLow CostInstallation Friendly (Retrofit & New) Lightweight Patent Pending Design
The information contained herein is proprietary and confidential information of Fortran Traffic Systems Limited.Copyright ©2010 Fortran Traffic Systems Limited. All rights reserved.
SNOW SENTRYTM
SNOW SENTRY ITE TESTINGIndependent lighting laboratory testing in 2009 and 2010 of the SNOW SENTRY installed on LED modules.
Results from both tests showed “the Snow Sentry Shield appears to allow all the generated wavelengths of light to pass through with the same transmission.”
Lighting Sciences
The information contained herein is proprietary and confidential information of Fortran Traffic Systems Limited.Copyright ©2010 Fortran Traffic Systems Limited. All rights reserved.
SNOW SENTRYTM
- Barrie, ON- Fredericton, NB- Green Bay, Wisconsin- Halifax, NS- Illinois DOT- Manitoba - Michigan DOT - Mississauga, ON- Minnesota DOT - Ottawa, ON- Penn DOT- Rockford, Illinois- Toronto, ON- York Region- Wisconsin DOT
SAMPLE CUSTOMERS
The information contained herein is proprietary and confidential information of Fortran Traffic Systems Limited.Copyright ©2010 Fortran Traffic Systems Limited. All rights reserved.
SNOW SENTRYTM
Would you use this:
Or this:
The information contained herein is proprietary and confidential information of Fortran Traffic Systems Limited.Copyright ©2010 Fortran Traffic Systems Limited. All rights reserved.
SNOW SENTRYTM
Manufactured in Canada by:
Fortran Traffic Systems Limited470 Midwest RoadToronto, ON M1P 4Y5Tel: (800) 387-4555
www.fortrantraffic.com
The information contained herein is proprietary and confidential information of Fortran Traffic Systems Limited.Copyright ©2010 Fortran Traffic Systems Limited. All rights reserved.
SNOW SENTRYTM
THANK YOUITE AND USDOT
The information contained herein is proprietary and confidential information of Fortran Traffic Systems Limited.Copyright ©2010 Fortran Traffic Systems Limited. All rights reserved.