Loop Detector

We originally developed this loop detector because of our poor experience with piezo sensors in relatively soft asphalt concrete roads in NZ.  Speed cameras being used in NZ at the time used an array in the road lane consisting of two piezo strips spaced 6m apart with a loop in between them, to detect and ensure the actual presence of a vehicle.  The loop detector we designed, used two loops in a road lane and virtualised these into an array of two piezo sensors with a loop in between, to satisfy the needs of the speed camera.  The results were excellent, with speed accuracy being maintained up to 200 km/h….more


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