The axle box acceleration measuring system measures vertical accelerations of both axle boxes of one axle caused by roughness or misalignments of the rail surface. The system can be used for automatic detection of rail joints and also as a corrugation indicator. Due to the use of accelerometers, excellent signal analysis is guaranteed at speeds higher than 25 km/h.
The system consists of two accelerometers which are mounted vertically on the axle bearings of one running axle of the measuring bogie. Digital signals are sent to the on-board computer where they are stored together with the measured track data.
Plasser and Theurer also offers measuring systems for lateral axle accelerations and car body accelerations for all three axes.
