Sensor for vehicles classification

This paper focuses on problems of gathering parameters of a traffic flow using simple sensors. The first part of the paper describes properties of a sensor node based on a magnetometer. The influence of various parameters (vehicle velocity, sensor location and orientation) on sensor output has been evaluated. We found that the sensor is sufficiently sensitive to be located on the road verges. In the second part, the sensor is used for vehicles classification based on estimate of their length. Velocity of vehicles is measured by a speed trap. The results of classification are compared with measurements where the velocity of vehicles is just estimated.