Electric measuring arrangement for determining the level of an electrically conductive liquid
AssigneeHL Planartechnik GmbH
InventorsMichael Fidelak, Marlies Bartsch
Life of this patent
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Abstract
An electric measuring arrangement having at least one measuring sensor and an evaluation circuit which makes possible a continuous measurement of not only the level of a conductive liquid in a container but, also, enables evaluation of as much other physical data relating to the liquid as possible, such as its inclination, the position of a movable body in the liquid, linear or rotational acceleration, and speed. Each measuring sensor is designed as a stray field sensor with two measuring electrodes that are at a specific lateral distance from one another, and the container, together with the liquid placed in it, form a part of the measuring arrangement.
Claims30
Electric measuring arrangement for determining liquid level and other physical data relating to an electrically conductive liquid located in a container, comprising at least one measuring sensor and an evaluation circuit;
- wherein the at least one measuring sensor is a stray field conductivity sensor with two measuring electrodes spaced at a specific lateral distance from one another, said electrodes producing an electromagnetic stray field within the electrically conductive liquid, the electrodes being disposed within the container in direct electrical contact with the electrically conductive liquid in the container wherein the container together with the electrically conductive liquid in it form a part of the measuring arrangement;
- and wherein the evaluation circuit comprises means for determining physical characteristics pertaining to the electrically conductive liquid from the volume of liquid measured over the measuring sensor, a known value of the conductivity of the electrically conductive liquid and said specific lateral distance.
Electric measuring arrangement for determining physical data of at least one movable body disposed within an electrically conductive liquid in a container comprising a container of electrically conductive liquid, at least one movable body disposed within the liquid so as to move along a path therein at least one measuring sensor and an evaluation circuit;
- wherein each measuring sensor is a stray field sensor with two measuring electrodes located essentially within a common plane at a specific lateral distance from each other;
- and wherein the measuring sensor is placed near the path of movement of the movable body with electrode surfaces of measuring electrodes aligned relative to the movable body.
Dependencies are inferred from the claim text.