SafeZone Wireless Radar units are designed as a low cost, compact, pole-mounted (or alternately building or railway sleeper mounted) detection solution.
They are intended as an alternate or supplementary system to other hard-wired electro-mechanical systems, such as track detection circuits used at railway crossings to detect trains. Their primary benefit is that they:
Currently being trialled in rail applications in Australia, they have shown detection/false detection rates on par with electro-mechanical systems.
The very fact that the control electronics can be pole-mounted and solar powered, whereas traditional systems typically require large, expensive and complex pedestal-mounted, mains-powered control systems, makes them a superior solution in remote areas or anywhere that budgets only allow for passive (ie unlit signage) type hazard warnings.
As an example, a traditional railway crossing detection system, comprised of track circuits and pedestal mounted electronics, can cost 3 or more times that of a wireless SafeZone radar detection system - and can take days or even weeks longer to install and commission than the SafeZone system.
The radar unit's operation is controlled by an ADR (Alert Device Controller) which applies site specific logic to the signals received so as to control the local SafeZone warning system appropriately.
Single Unit deployment:
Pole or building mounted radar can be used to detect a vehicle entering or leaving a designated zone. Once detected, a network of wireless warning devices, whether they be Active Advance warning Signs (AAWSs), In-Road Alert Beacons (IRADs) or other devices, can activated.
In this type of deployment, the network of warning beacons would usually be set to deactive (ie, time out) after a certain period. this is because without a second trigger to deactivate the network (eg such as a secon radar unit), the network has no other means to be turned off.
However, an option exists to have the radar both activate and deactivate a network. In this type of deployment, the radar signals that a vehicle has been detected and as soon as it no longer sees a moving vehicle, signals the network fo warning devices to deactivate. This type of triggering mechanism can be used to send an alert to an operator, for example, managing traffic flow in a distribution centre, that a vehicle has passed a specific point.
Dual Unit deployment:
Where vehicles entering AND exiting a zone are required (eg a railway level crossing, or trucks entering and leaving a loading bay in a distribution centre), OR, where detecting a vehicle over a certain length is required, two (or more) radar units can be implemented.
Generally pole mounted at the start and end of a zone, these units signal a Network Device Controller, which in turn administers activation/deactivation of the network's warning beacons.
Where detecting a vehicle of over a certain length is the be the trigger (eg a B Double or a logging truck), pole mounted radar can be used to measure vehicle length. In this type of deployment, teh warning system would generally be set to time out after a certain period after a vehicle of interest has been detected passing the radar array.
Multiple Unit deployment:
In deployments such as railway level crossings, where it is necessary to both detect vehicle entering a zone AND leaving it, to control both activation and deactivation of the SafeZone warning network, multiple radar units are positioned as required.
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