Video Detection Sensor for Vehicle Presence

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Video Detection Sensor for Vehicle Presence
Basic Principles, Selection, Installation
Configuration
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Video detection Detection zones on video
image TrafiCam Vehicle presence
detection Detection output generation
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Functionalities

• Basic functionality vehicle presence

• Alternative functionality
• count (number of pulses)
• zone occupancy (length of pulses)

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Selection 2 lens types available

• TrafiCam Wide Angle (focal distance 3mm)
• Detection at close range (0-25m), with a wide
  camera view
• Rather vertical camera position
• Typical camera height
• side fired 3,5-8m
• overhead 5-8m

• TrafiCam Narrow Angle (focal distance 8mm)
• Detection at a longer distance (15-75m), with a
  wide camera view, but zoomed in
• More horizontal camera position
• Typical camera height
• side fired 8-12m
• overhead 6-10m

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Camera View TrafiCam Wide Angle
0-25m 4 lanes
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Camera View TrafiCam Narrow Angle
15-75m 4 lanes
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TrafiCam Wide Angle vs Narrow Angle
Narrow Angle
Wide Angle
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Example TrafiCam Wide Angle
Three lanes, stop bar detection, TrafiCam
overhead at 6m height
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Example TrafiCam Narrow Angle
Three lanes, advance detection, TrafiCam overhead
at 8m height
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Installation
no horizon in the image
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Installation
be aware of optical occlusion!
5m camera height, no offset
9m camera height, no offset
5m camera height, 2m offset

• on the same lane
• - on adjacent lanes

Offset distance from the edge of the road
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Installation
vertical or horizontal mounting

• Mount on solid infrastructure
• Fixation with bolts or (stainless steel) bands

Try to avoid camera movement. This could decrease
the detection performance!
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Examples Vertical Mounting
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Example Horizontal Mounting
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Example Alternative Mounting
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Configuration
optimal size of detection zone slightly
exceeding size of a regular car
Multiple detection zones per lane possible to
cover a larger area
Size regular car about 2m wide 5m long
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Configuration
Direction sensitivity
Make a zone direction sensitive only to avoid
unwanted detections
A direction sensitive zone could decrease the
detection performance
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Configuration
Vehicle headlights in detection zone
detection during daytime on vehicle detection
at night on vehicle headlights
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Configuration
Advanced settings

• Use headlight reflection suppression only when
  strong reflections are expected

• Use tree shadow suppression only when strong
  tree shadows are expected

• Use camera movement suppression only when
  significant camera shaking is expected

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Traficon nv Tel. [phone] Fax 32
(0)56 37 21 96 E-mail traficon_at_traficon.com
www.traficam.com