Potential separation for filling level radar
First Claim
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1. A filling level radar for determining a filling level in a tank, comprising:
- a first waveguide having a constant inner diameter;
a second waveguide having a constant inner diameter that is equal to the inner diameter of the first waveguide and a cylindrical recess and being galvanically insulated from the first waveguide; and
a separation element positioned between the first waveguide and the second waveguide, the separation element having a tubular end section with an inner diameter that is smaller than the inner diameters of the first and second waveguides and an outer diameter that is equal to the inner diameters of the first and second waveguides, the separation element being configured for tight insertion into the cylindrical recess of the second waveguide,wherein the separation element is configured to connect the first waveguide to the second waveguide and to galvanically insulate the first waveguide from the second waveguide,wherein the separation element includes a tubular section coaxially aligned with the first waveguide and the second waveguide.
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Abstract
For safety reasons the potential of an electrical supply line of a radar sensor should be separate from the potential of the filling level container. An arrangement for potential separation for a filling level radar is provided, which arrangement comprises a separation element for insulating the waveguide from the antenna. The separation element, corresponding to the cross section of the waveguide, is ring shaped. In this way rotatability between the sensor housing and the antenna subassembly is provided without influencing the signal line between the antenna and the waveguide.
19 Citations
22 Claims
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1. A filling level radar for determining a filling level in a tank, comprising:
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a first waveguide having a constant inner diameter; a second waveguide having a constant inner diameter that is equal to the inner diameter of the first waveguide and a cylindrical recess and being galvanically insulated from the first waveguide; and a separation element positioned between the first waveguide and the second waveguide, the separation element having a tubular end section with an inner diameter that is smaller than the inner diameters of the first and second waveguides and an outer diameter that is equal to the inner diameters of the first and second waveguides, the separation element being configured for tight insertion into the cylindrical recess of the second waveguide, wherein the separation element is configured to connect the first waveguide to the second waveguide and to galvanically insulate the first waveguide from the second waveguide, wherein the separation element includes a tubular section coaxially aligned with the first waveguide and the second waveguide. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An antenna for at least one of transmitting and receiving electromagnetic waves, comprising:
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a second waveguide having a constant inner diameter and a cylindrical recess; and a separation element connecting the second waveguide to an external first waveguide that has a constant inner diameter that is equal to the inner diameter of the second waveguide, the separation element galvanically insulating the second waveguide from the first waveguide, the separation element including a tubular end section with a constant inner diameter coaxially aligned with the first waveguide and the second waveguide, the separation element being configured for tight insertion into the cylindrical recess of the second waveguide, wherein the inner diameter of the tubular end section is smaller than the inner diameters of the first and second waveguides, and wherein the tubular section has an outer diameter that is equal to the inner diameters of the first and second waveguides. - View Dependent Claims (16, 17, 18, 19, 20)
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21. A filling level radar for determining a filling level in a tank, comprising:
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a first waveguide having a first inner diameter; a second waveguide having a second inner diameter and a cylindrical recess and being galvanically insulated from the first waveguide; and a separation element positioned between the first waveguide and the second waveguide, the separation element having a tubular end section with a third inner diameter that is smaller than the first inner diameter and the second inner diameter, the separation element being configured for tight insertion into the cylindrical recess of the second waveguide, wherein the separation element is configured to connect the first waveguide to the second waveguide and to galvanically insulate the first waveguide from the second waveguide, wherein the separation element includes a tubular section coaxially aligned with the first waveguide and the second waveguide, wherein the separation element is adapted for being inserted into the second waveguide; wherein the separation element comprises a nose section; wherein the second waveguide comprises a groove section; and wherein the nose section engages the groove section thus forming a releasable connection between the separation element and the second waveguide when the separation element is inserted into the second waveguide.
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22. An antenna for at least one of transmitting and receiving electromagnetic waves, comprising:
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a second waveguide having a second inner diameter and a cylindrical recess; and a separation element connecting the second waveguide to an external first waveguide that has a first inner diameter, the separation element galvanically insulating the second waveguide from the first waveguide, the separation element including a tubular end section with a third inner diameter coaxially aligned with the first waveguide and the second waveguide, the separation element being configured for tight insertion into the cylindrical recess of the second waveguide, wherein the third inner diameter is smaller than the first and second inner diameters, wherein the separation element is configured to be inserted into the second waveguide, the separation element including a nose section, the second waveguide including a groove section, the nose section engaging the groove section thus forming a releasable connection between the separation element and the second waveguide when the separation element is inserted into the second waveguide.
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Specification