sensice ice detectors dr ulf elman, president sensice 070320

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Sensice ice detectors

Dr Ulf Elman, President

Sensice 070320

Traffic accidents in Sweden 1995-1999:

Sensice 070320

•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

Fixed applications

Roadside mounting

Sensice 070320

Fixed applications

Icing alert at building entrances

Sensice 070320

Fixed applications

Ice detection at airports

Sensice 070320

Fixed applications

Ice sheet or icicle buildup at sensitive spots

Sensice 070320

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 mountingInsensitive to ambient light and works in darkness

Sensice 070320

In-car mountingSeveral interface options:

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•Display integrated with detector

•Separate display unit

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

In-car mounting

Placing the detector head:

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•Integrated display and detector head behind windscreen

•Separate detector head at front of vehicle

General properties

Uses infrared spectroscopy

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General properties

Principles of spectroscopy

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•Ice transparent to visible light

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

•Ice is distinctly ”coloured” in the NIR range

General properties

Four state system

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1. Dry

2. Wet

3. Ice

4. Mix of ice and water

General properties

Six state system

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2. Wet

1. Dry

3. Clear ice

4. Snow

5. Sleet

6. Wet clear ice

General properties

Six state system

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• Ice and water ratio

• Ice and water thickness

• Accepts larger layer thickness range

Failure rate

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

•Intrinsic failure rate

•External error sources

•Staring system, detection area may leave road surface•Objects in line of sight, such as wipers or other cars, may interfer with detection

Synergy effects

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

•May beneficially use rain sensor data

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

•Cooperates advantageously with adaptive headlights

Decreasing size and weight

Sensice 070320

•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

Sensice’s unique detectors

•Excessively expensive systems for ice

detection have been around for decades

Sensice 070320

•Sensice’s ice detectors are unique in that they are produceable at cost levels

acceptable to consumers

Company facts, Sensice

Sensice 070320

•Founded 2004

•First order september 2005 (Volvo, LuTH)

•Two patents granted, further patents pending

Thank you

Sensice 070320

Further information:

www.sensice.com

Inquiries:

inquiries@sensice.com

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