Method for determining quality of measurement in a radar level gauge system
First Claim
1. A method for determining a quality of measurement in a radar level gauge system arranged to measure a filling level of a content contained in a tank, comprising the steps of:
- providing an antenna having at least two separate antenna functions, including a transmitting function and a receiving function;
transmitting microwave energy using said transmitting function of said antenna;
receiving a reflected part of said microwave energy, reflected from said level of content to be gauged, using said receiving function of said antenna;
detecting a leakage signal, said leakage signal leaking from said transmitting function of said antenna to said receiving function of said antenna; and
determining, based on a relationship between said leakage signal and said reflected signal, a level of quality of said reflected signal.
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Accused Products
Abstract
A method for determining a quality of measurement in a radar level gauge system arranged to measure a filling level of a content contained in a tank, comprising the steps of providing an antenna having at least two separate antenna functions, including a transmitting function and a receiving function, transmitting microwave energy from said transmitting function of said antenna, receiving a reflected part of said microwave energy, reflected from said level of content to be gauged, using said receiving function of said antenna, detecting a leakage signal, said leakage signal leaking from said transmitting function of said antenna to said receiving function of said antenna, and determining, based on a relationship between said leakage signal and said reflected signal, a level of quality of said reflected signal. An advantage with the above method is its improved accuracy when determining the level of quality, since there is no need for a separate reference reflection point.
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Citations
101 Claims
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1. A method for determining a quality of measurement in a radar level gauge system arranged to measure a filling level of a content contained in a tank, comprising the steps of:
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providing an antenna having at least two separate antenna functions, including a transmitting function and a receiving function;
transmitting microwave energy using said transmitting function of said antenna;
receiving a reflected part of said microwave energy, reflected from said level of content to be gauged, using said receiving function of said antenna;
detecting a leakage signal, said leakage signal leaking from said transmitting function of said antenna to said receiving function of said antenna; and
determining, based on a relationship between said leakage signal and said reflected signal, a level of quality of said reflected signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for measuring a filling level of a content contained in a tank, comprising the steps of:
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providing an antenna having at least two antenna functions, including a transmitting function and a receiving function;
transmitting microwave energy using said transmitting function of said antenna;
receiving a reflected part of said microwave energy, reflected from said level of content to be gauged, using said receiving function of said antenna;
calculating a level of content in said tank based on said reflected signal;
detecting a leakage signal, said leakage signal leaking from said transmitting function of the antenna to said receiving function of the antenna; and
determining, based on a relationship between said leakage signal and said reflected signal, a level of quality of said calculation. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A radar level gauge system, for measuring a filling level of a content contained in a tank, said radar level gauge system comprising:
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an antenna having at least two antenna functions, including a transmitting function and a receiving function;
a transmitter arranged outside said tank and configured to transmit microwave energy using a transmitting function of said antenna;
a receiver arranged outside said tank and configured to receive reflected microwave energy, reflected from said level of content to be gauged, using a receiving function of said antenna; and
a controller arranged to determining a filling level based on said reflected microwave energy;
wherein the controller is further arranged to detect a leakage signal, said leakage signal leaking from said transmitting function of said antenna to said receiving function of said antenna and to determine, based on a relationship between said leakage signal and said reflected signal, a level of quality of said reflected signal. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26)
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101-126. -126. (canceled)
Specification