Smart Parking
New Smart Parking Sensor Node
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Hunter's comment
A smart parking node which is connected to the wireless system. It can detect metals and other things placed in the vehicle. It uses magnetic field waves. It can give 99% accuracy in optimal conditions.
The main method is magnetic detection: a 3-axis magnetic sensor reads the variations in the Earth's magnetic field. The big mass of metal of a car parked on the slot changes this field and the node will know. The software inside the node implements advanced algorithms to dynamically compensate the temperature variations and also the influence of neighbor cars.
Source
Link
http://www.libelium.com/products/smart-parking/
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