METHOD AND APPARATUS FOR DECISION OF LIMIT FILLING LEVEL OF OBJECT, TO BE FILLED, AT INSIDE OF CONTAINER

摘要

PROBLEM TO BE SOLVED: To obtain a method and an apparatus in which the prescribed limit level of an object, to be filled, inside a container can be detected with high reliability. SOLUTION: A measuring signal at a high frequency is coupled to a conductive element 6 in a prescribed length so as to be guided along the conductive element. The measuring signal is reflected every time as an echo signal related to a system within a range in which a wave impedance is changed at the conductive element. The measuring signal is reflected as a useful echo signal when the free end part 7 of the conductive element is situated immediately close to the surface 10 of the object 9 to be filled or comes into contact with the object to be filled, Whether the object, to be filled, inside the container 8 reaches a prescribed filling level can be investigated by the useful echo signal and by the relative position of the echo signal related to at least one system.