Sensice ice detectors

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Sensice ice detectors

• Dr Ulf Elman, President

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Traffic accidents in Sweden 1995-1999

• 37828 at snowy or icy road surface conditions, of
  these did

• 15589 occur during black ice conditions, and in
  addition did

• 572 accidents related to aquaplaning occur

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Fixed applications

• Roadside mounting

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Fixed applications

• Icing alert at building entrances

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Fixed applications

• Ice detection at airports

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Fixed applications

• Ice sheet or icicle buildup at sensitive spots

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In-car mounting

• Detection range 50m

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In-car mounting

• Continuous detection with a response time of 0.1
  s

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In-car mounting

• Insensitive to ambient light and works in darkness

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In-car mounting

• Several interface options

• Display integrated with detector

• Separate display unit

• FlexRay, CAN-bus, Ethernet, USB, RS232 or RS485

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In-car mounting

• Placing the detector head

• Integrated display and detector head behind
  windscreen

• Separate detector head at front of vehicle

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General properties

• Uses infrared spectroscopy

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General properties

• Principles of spectroscopy

• Ice transparent to visible light

• Ice is reflective (metal like) in the MIR range

• Ice is distinctly coloured in the NIR range

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General properties

• Four state system

1. Dry
2. Wet
3. Ice
4. Mix of ice and water
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General properties

• Six state system

1. Dry
2. Wet
3. Clear ice
4. Snow
5. Sleet
6. Wet clear ice
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General properties

• Six state system

• Ice and water thickness

• Ice and water ratio

• Accepts larger layer thickness range

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Failure rate

• External error sources

• Unable to separate water/ice on windscreen or in
  the air from water/ice on road surface

• Staring system, detection area may leave road
  surface

• Objects in line of sight, such as wipers or other
  cars, may interfer with detection

• Intrinsic failure rate

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Synergy effects

• Does not interfer with infrared night vision
  system and may share some optics with it

• Cooperates advantageously with adaptive
  headlights

• If mounted behind windscreen it may use wiper
  control system data

• May beneficially use rain sensor data

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Decreasing size and weight

• Present volume 2.8 l, weight 2.7 kg

• Next version volume 1.0 l, weight 0.5 kg

• Ultimate size limit set by aperture sizes, may be
  made far smaller and much more lightweight

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Sensices unique detectors

• Excessively expensive systems for ice detection
  have been around for decades

• Sensices ice detectors are unique in that they
  are produceable at cost levels acceptable to
  consumers

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Company facts, Sensice

• Founded 2004

• First order september 2005 (Volvo, LuTH)

• Two patents granted, further patents pending

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Thank you
Further information www.sensice.com Inquiries i
nquiries_at_sensice.com
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