Method for determining and/or monitoring filling of a...

Details Method for determining and/or monitoring filling of a... Method for determining and/or monitoring filling of a...

2005-02-15

2005-02-15

Le, N. (Department: 2858)

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Distributive type parameters

C073S29000R, C342S124000

Reexamination Certificate

active

06856142

ABSTRACT:
The invention relates to a device for determining and/or monitoring filling of a product or the position of the boundary surface between two media or phases in a container. The device comprises a signal generating unit that generates high-frequency measuring signals, an injection unit and a surface waveguide, wherein the measuring signals are injected into the surface waveguide by means of the injection unit and directed toward the filling product via the surface waveguide. The device also comprises a receiver/evaluation unit, which directly or indirectly determines filling of the product or the position of the boundary surface in the container during the running time of the measuring signals reflected on the surface or boundary surface of the filling product. The invention aims at providing a device which is configured in such a way that parasitic voltages are effectively diverted. This is achieved in that the surface waveguide is connected to a frame potential by means of a coupling.

REFERENCES:
patent: 3812422 (1974-05-01), De Carolis
patent: 4158964 (1979-06-01), McCrea et al.
patent: 5781019 (1998-07-01), Telder
patent: 6266022 (2001-07-01), Muller et al.
patent: 4404745 (1995-08-01), None
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patent: 0780664 (1997-06-01), None
patent: 0780664 (1998-01-01), None
patent: 0875738 (1998-11-01), None
patent: 0928955 (1999-07-01), None

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