Model-based noise suppression for level indicators

摘要

A model is based on noise-suppression technique in level indicators that uses mutually independent mathematical models, the quality of each of which models is calculated by comparing with measured values. The models are then weighted and combined, or a single model is selected, in order to calculate the level at a later point in time. Effective noise suppression may be achieved by these means.

主权项

1. A level indicator for determining a level of a bulk material, comprising:
a sensor device capturing a measured value that corresponds to the level of the bulk material at a first point in time; and a control unit performing following steps for the captured measured value: updating different and mutually independent mathematical models using the captured measured value; calculating a quality of each individual model; weighting and combining the models or selecting one of the models according to the respective quality of the model; calculating a level of the bulk material at a second, later point in time by the weighted and combined models or by the selected model; and outputting the level calculated by the weighted and combined models or by the selected model.