A Wireless Sensor System for Traffic Flow Detection based on Measurement of Earth's Magnetic Field Changes

The work described in this paper aims at the development of a networkable, intelligent embedded system application, which is used for data acquisition and analysis in traffic flows. The main components of the sensor system and their interaction are explained. The sensor system is constructed in such a way that, in addition to the use of magnetic field sensors, further sensors which are useful for the respective detection task can be added. Furthermore, measuring procedures in the laboratory and in field trials on the road are described and illustrated. A selection of the results is presented.