| 摘要 |
A method and apparatus for non-contact determination of overfilling of a receptacle filled with a filling product generates an envelope curve from echo signals reflected on a filling product surface. An amplitude of the echo signals is mathematically processed in a predetermined short range of the envelope curve, and is compared to a predetermined reference value (x). When the amplitude exceeds the predetermined reference value (x), a signal representative of overfilling of the receptacle is outputted. Further, described are an evaluation arrangement for realizing the method and a filling level measuring device equipped with such an evaluation arrangement.
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