The instrument

-A dynamic rail weighing system for weighing a ship (or boat) of passing dike is presented in this paper. The system applies wheel measurement to get weigh signal and model-based measurement processing weigh signal, thus weighing a ship (or boat) of passing dike. A scaling method of the rail weighing system based wheel measurement is proposed. This paper discusses thoroughly that the method of model-based measurement processes weigh signals. Keyword: Rail Weighing System, Wheel Measurement, Model-based Measurement.