Radar level gauge system and method providing a signal indicative of process reliability
First Claim
1. A method for determination of a filling level of a product contained in a tank, comprising the steps of:
- generating and transmitting an electromagnetic signal;
propagating said transmitted electromagnetic signal towards said product in the tank;
receiving echo signals resulting from reflections at impedance transitions encountered by said transmitted electromagnetic signal;
classifying one of said echo signals as a surface echo signal resulting from reflection at a surface of said product inside the tank;
evaluating an additional echo signal;
providing, if an amplitude of said additional echo signal is greater than a predetermined disturbance echo threshold, a signal indicative thereof; and
determining said filling level based on said surface echo signal.
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Accused Products
Abstract
A method for determination of a filling level of a product contained in a tank, comprising the steps of generating and transmitting an electromagnetic signal; propagating the transmitted electromagnetic signal towards the product in the tank; receiving echo signals resulting from reflections at impedance transitions encountered by the transmitted electromagnetic signal; classifying one of the echo signals as a surface echo signal resulting from reflection at a surface of the product inside the tank; evaluating an additional echo signal; providing, if an amplitude of the additional echo signal is greater than a predetermined disturbance echo threshold, a signal indicative thereof; and determining the filling level based on the surface echo signal.
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Citations
40 Claims
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1. A method for determination of a filling level of a product contained in a tank, comprising the steps of:
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generating and transmitting an electromagnetic signal; propagating said transmitted electromagnetic signal towards said product in the tank; receiving echo signals resulting from reflections at impedance transitions encountered by said transmitted electromagnetic signal; classifying one of said echo signals as a surface echo signal resulting from reflection at a surface of said product inside the tank; evaluating an additional echo signal; providing, if an amplitude of said additional echo signal is greater than a predetermined disturbance echo threshold, a signal indicative thereof; and determining said filling level based on said surface echo signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A radar level gauge system, for determination of a filling level of a product contained in a tank, said radar level gauge system comprising:
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a transceiver for generating, transmitting and receiving electromagnetic signals; a propagation device connected to said transceiver and arranged to propagate a transmitted electromagnetic signal towards said product inside the tank, and to return echo signals resulting from reflections at impedance transitions encountered by said transmitted signal back to said transceiver; and processing circuitry connected to said transceiver and comprising; a signal classifier for classifying one of said echo signals as a surface echo signal resulting from reflection at a surface of said product inside the tank; a comparator for comparing an amplitude of an additional echo signal with a disturbance echo threshold; a signal generator for providing, if said amplitude is greater than said disturbance echo threshold, a signal indicative thereof; and determination circuitry for determining said filling level based on said surface echo signal. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A method for determination of a filling level of a product contained in a tank, comprising the steps of:
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generating and transmitting an electromagnetic signal using a transceiver; propagating said transmitted electromagnetic signal towards said product in the tank; receiving echo signals resulting from reflections at impedance transitions encountered by said transmitted electromagnetic signal; classifying one of said received echo signals as a surface echo signal resulting from reflection at a surface of said product inside the tank; evaluating an additional echo signal resulting from reflection at an additional impedance transition located above a position associated with said surface echo signal; determining a reliability measure for said determination of the filling level based on at least one property of said additional echo signal; and determining said filling level based on said surface echo signal. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A radar level gauge system, for determination of a filling level of a product contained in a tank, said radar level gauge system comprising:
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a transceiver for generating, transmitting and receiving electromagnetic signals; a propagation device connected to said transceiver and arranged to propagate a transmitted electromagnetic signal from said transceiver towards said product inside the tank, and to return echo signals resulting from reflections of said transmitted electromagnetic signal at impedance transitions encountered by said transmitted electromagnetic signal back to said transceiver; and processing circuitry connected to said transceiver and comprising; a signal classifier for classifying one of said echo signals as a surface echo signal resulting from reflection at a surface of said product inside the tank; an evaluator for evaluating an additional echo signal; and determination circuitry for determining a reliability measure for said determination of the filling level based on at least one property of said additional echo signal and for determining said filling level based on said surface echo signal. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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39. A method for determination of a filling level of a product contained in a tank, comprising the steps of:
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generating and transmitting an electromagnetic signal using a transceiver; propagating said transmitted electromagnetic signal towards said product in the tank; receiving echo signals resulting from reflections at impedance transitions encountered by said transmitted electromagnetic signal; classifying one of said received echo signals as a surface echo signal resulting from reflection at a surface of said product inside the tank; evaluating an additional echo signal resulting from reflection at an additional impedance transition located above a position associated with said surface echo signal; determining a reliability measure for said determination of the filling level based on a relation between said surface echo signal and said surface echo threshold; and determining said filling level based on said surface echo signal. - View Dependent Claims (40)
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Specification