Electromagnetic flowmeter and method incorporating the same
AssigneeSiemens Aktiengesellschaft
InventorSteen Moellebjerg Matzen
Life of this patent
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Abstract
An electromagnetic flowmeter for measuring the flow of a medium through a measuring pipe, wherein the flowmeter includes first and second electrodes arranged on opposite sides of the measuring pipe and coupled electrically or capacitively to the medium. A common mode test signal is passed to the first and second electrodes. A third electrode is provided at the top of the measuring pipe for receiving a response signal in response to the test signal passed to the first and second electrodes. The flowmeter also includes a detection device for detecting whether the third electrode is in contact with the medium based on the response signal.
Claims13
An electromagnetic flowmeter for measuring the flow of a medium through a measuring pipe, comprising:
- first and second electrodes arranged on opposite sides of the measuring pipe and coupled one of electrically and capacitively to the medium;
- a device for passing a test signal as a common mode signal to the first and second electrodes;
- a third electrode arranged at a top of the measuring pipe for receiving a response signal in response to the test signal passed to said first and second electrodes;
- and
- a detection device for detecting whether said third electrode is in contact with the medium based upon said response signal.
A method for measuring flow of a medium through a measuring pipe, comprising:
- passing a test signal as a common mode signal to first and second electrodes arranged on opposite sides of the measuring pipe and coupled one of electrically and capacitively to the medium;
- measuring a response signal received at a third electrode arranged at a top of the measuring pipe in response to the test signal passed to the first and second electrodes;
- and
- detecting whether the third electrode is in contact with the medium based upon said response signal.
Dependencies are inferred from the claim text.