Sensys Stud Trial - Sensys Networks
Sensys Stud Trial - Sensys Networks
Sensys Stud Trial - Sensys Networks
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<strong>Sensys</strong> <strong>Stud</strong> <strong>Trial</strong><br />
2. Introduction<br />
2.1 Background<br />
Inductive loops have been used as the primary method for detection vehicle presence on the<br />
Auckland motorway network for a number of years. While the technology is accurate and<br />
reliable it does come with a few disadvantages:<br />
• They are easily damaged by resurfacing works.<br />
• Installing them requires a significant cost in traffic management, and associated<br />
disruption to the road user.<br />
• The current inductive loops detector station only report back to a single system. This<br />
leads to the use of two different sets of loops in the road surface.<br />
A system that is not damaged by resurfacing, is easy to install and can communicate to both<br />
the ATMS and SCATS systems would be an improvement to the current arrangement. The<br />
<strong>Sensys</strong> studs offer all these advantages.<br />
2.2 Technology Summary<br />
The <strong>Sensys</strong> Wireless Vehicle Detection System can be used in traffic monitoring and<br />
management applications as a direct replacement for conventional inductive loops. Like<br />
inductive loops, <strong>Sensys</strong> wireless sensors can be located exactly where measurements are<br />
required; whether it is at a specific through lane, turn lane, or entrance or exit ramp.<br />
The <strong>Sensys</strong> Wireless Vehicle Detection System employs ruggedised in-pavement-mounted<br />
magneto-resistive sensors to detect the presence and movement of vehicles. The <strong>Sensys</strong><br />
vehicle sensors are wireless, transmitting their real-time detection data via radio to a nearby<br />
<strong>Sensys</strong> access point that then communicates the data to a local traffic controller, to a remote<br />
traffic management system, or to both at once. The low-power circuitry gives an average<br />
battery life of a sensor is 10 years. When power is getting low a message is sent allowing<br />
planned replacements without outages.<br />
A <strong>Sensys</strong> access point can collect detection data from many <strong>Sensys</strong> wireless sensors, either<br />
directly from sensors within a range of approximately 45 meters (depending on the mounting<br />
height of the access point) or from sensors supported by one or more <strong>Sensys</strong> repeaters that<br />
are within a range of approximately 300 meters of the access point.<br />
Detection data collected by the <strong>Sensys</strong> access point can then be provided via contact<br />
closure interface to a roadside traffic controller or via IP (Internet Protocol) communications<br />
over twisted pair, coaxial cable, fibre optic cable, or wireless services to central facilities or<br />
via both data paths simultaneously.<br />
Commercial in Confidence Page 6