Advances in train monitoring by networked checkpoints

Due to the increasing centralization of train operation and decrease in visual train inspection by station personnel there is an increasing demand for automated train inspection systems. One approach is to combine the abilities of multiple sensors to an integrated modular system for evaluation of the train condition, called "checkpoint". Further improvement of train monitoring can be achieved by using networks to exchange train information. The data-exchange enables the system to do trend-analysis for characteristics that evolve slowly over time the train is in operation. Another advantage of this data-exchange mechanism is that expensive detection equipment must not be installed at all monitoring stations and even equipment outages can be compensated by acquiring information from previously passed checkpoints.