GENERAL FEATURES

Now with kerbside and on-crossing pedestrian detection Heimdall is a product giving customers a simple and cost-effective alternative for pedestrian detection.
At the heart of each detector is a technologically-advanced planar radar antenna system and a sophisticated digital signal processing engine. These incorporate features enable Heimdall to offer excellent pedestrian and vehicle detection, count and occupancy performance as well as good ‘gap’ detection capabilities. Heimdall applications include:

• Pedestrian on-crossing
• Pedestrian kerbside (standard and volumetric)
• Single lane and dual lane vehicle approach
• Stop line
• Selectable speed activation

With advanced radar technology, Heimdall is largely immune to changing environmental conditions including sun and shadow, snow or fog, ensuring reliable detection.
Unlike some vision-based systems, Heimdall’s radar technology eliminates false detection due to light level changes and the effect of shadows and will continue to work equally well in both bright and totally dark locations.
Similarly, the effects of fog and rain, which can severely affect the performance of vision-based systems, go largely unnoticed when Heimdall is deployed, ensuring the best possible performance of the road network, whatever the conditions.
Heimdall benefits:

• Simple installation
• Low maintenance
• Immune to changing weather and light conditions
• Easy replacement of previously installed units

ON-CROSSING DETECTOR

Designed to be used in pairs, this CW Doppler solution provides reliable detection of pedestrians when crossing at Puffin and similar type crossings. The use of on-crossing detectors enables the pedestrian green ‘invitation to cross’ period to be kept to a minimum whilst ensuring conflicting vehicle green signals are delayed until the pedestrians have safely crossed the road, significantly enhancing the efficiency of the crossing compared to older fixed crossing period solutions.

KERBSIDE DETECTOR

Using an advanced ‘dual antenna’ design the Heimdall kerbside detector provides dependable sensing of pedestrians waiting to cross at Puffin and similar crossing types. The unique use of two integrated antennas allows the detector to provide excellent performance at a wide range of crossings without the need to use complex and expensive set-up software.
By using advanced radar for this application the problems inherent in other solutions, which rely on video techniques, are eliminated and Heimdall kerbside units will operated as well in the dark as in fully lit conditions and are completely immune to the effects of shadows.

TECNICAL FEATURES

General for all detectors:

• Approval: EMC: EN50293 Radio approval: EN 300 440
• Supply voltage: 24V AC ± 20% (48 to 63 Hz), or 24V DC ± 20%
• Typical supply current: 143mA (AC) 113mA (DC) 186mA (AC) – with wireless or serial data options 147mA (DC) – with wireless or serial data options
• Operating frequencies 24.05 GHz to 24.25 GHz 13.4 GHz to 14.0 GHz (kerbside and On-crossing)
• Dimensions: 150mm (h) x 135mm (w) x 90mm (d) (to the bottom of mounting bracket)
• Weight: Less than 1.6Kg (including bracket)
• Standard connection: Defined Bulgin Buccaneer connector and pin-out or internal screw connector for connection of customer defned termination

On-Crossing detector:

• Operating range: Up to12m.
• Crossing width: Typically up to at least 4m when used as a pair • Pedestrian minimum threshold speed < 0.5m/s
• Detector location: Either side of crossing – no special adjustment needed to avoid interference between units.
• Detector mounting height: Various heights (above the ground) can be accommodated from 3.0m to 4.5m

Kerbside:
Operating range:

• Wait areas up to 4.5m wide (DIP switch setting for short and long wait areas)
• Wait area width – typically 1.0m (typical 2.0m adjacent to pedestrian demand unit)
• Fully static detection of pedestrians

Detector location:

• On pole with associated Pedestrian demand unit.
• Detector mounting height: Various heights (above the ground) can be accommodated from 3.3m to 4.0m