ANLEGGNING FOR OVERVAKNING AV FORDON

Apparatus for monitoring vehicles moving along a predetermined path, such as a train moving along a railroad track. At least two digital scales are positioned in the path and in a first embodiment include at least two load cells which are spaced apart less than the minimum axle spacing on the vehicles for successively measuring the axle weights of the moving vehicles. In a second embodiment, the load cells have a spacing greater than the maximum axle spacing on a truck at one end of a railroad car. The direction and speed of the vehicles are determined from the sequence and the time interval between peak outputs from the scales as the axles move sequentially over the scales. From the scale outputs, the apparatus may also determine when the vehicles stop or change direction, count the number of vehicles moving along the path, measure the total weight of each vehicle and identify the types of vehicles moving along the path. The output peaks from the scales are compared for detecting a failure in either scale during operation of the apparatus which would cause the peak weights to deviate by more than a permissable tolerance.