METHOD OF FILLING LEVEL MEASUREMENT OF LAYERED MEDIA

摘要

A method of filling level measurement in a container (12) having a first medium (14) and at least one second medium (16) arranged thereabove, in particular a foam layer, wherein an electromagnetic signal is transmitted, in particular along a probe (28) arranged in the container (12), and a signal curve (S) of the signal reflected in the container (12) is recorded, wherein a signal time of flight (t) up to a border transition (18, 20) to the first medium (14) and/or up to the second medium (16) is determined with reference to the signal curve (S) and a filling level of the first medium (14) and/or a filling level of the second medium (16) is determined from the signal time of flight (t). In this respect, the border transition (18, 20) is recognized from the integral over the signal curve (S), the integral starting from a reference position (t0).

主权项

1. A method of filling level measurement in a container (12) having a first medium (14) and at least one second medium (16) arranged thereabove, the method comprising the steps of:
transmitting an electromagnetic signal in the container (12), and recording a signal curve (S) of the signal reflected in the container (12); determining a signal time of flight (t) up to a border transition (18, 20) to the first medium (14) and/or up to the second medium (16) with reference to the signal curve (S); determining a filling level of the first medium (14) and/or a filling level of the second medium (16) from the signal time of flight (t); and recognizing the border transition (18, 20) from the integral over the signal curve (S), the integral starting from a reference position (t0).