Radar-based method for measuring a level of material in a container
First Claim
1. A radar-based method for measuring a level of material in a container, comprising:
- emitting microwaves to a surface of the material by a radar level gauge;
receiving echo waves reflected from the surface of the material using the radar level gauge;
converting the received echo waves into an echo function over time;
storing the echo function; and
establishing a useful echo and determining a position of the useful echo by evaluating the stored echo function;
wherein the echo function is converted and stored with a first higher resolution for a selected first portion of the entire level measurement range of the radar level gauge, andwherein the echo function is converted and stored with a second lower resolution or no echo function is converted and stored for the remaining second portion of the entire level measurement range.
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Accused Products
Abstract
Described is a radar-based method for measuring a level of material in a container. Microwaves are emitted to a surface of the material by a radar level gauge, echo waves reflected from the surface are received and the received echo waves are converted into an echo function which is stored and evaluated to establish a useful echo and to determine a position of the echo. The echo function is generated and stored with a first higher resolution for a selected first portion of the entire level measurement range of the radar level gauge. Further, the echo function is generated and stored with a second lower resolution or no echo function is generated and stored for the remaining second portion of the entire level measurement range.
16 Citations
11 Claims
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1. A radar-based method for measuring a level of material in a container, comprising:
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emitting microwaves to a surface of the material by a radar level gauge; receiving echo waves reflected from the surface of the material using the radar level gauge; converting the received echo waves into an echo function over time; storing the echo function; and establishing a useful echo and determining a position of the useful echo by evaluating the stored echo function; wherein the echo function is converted and stored with a first higher resolution for a selected first portion of the entire level measurement range of the radar level gauge, and wherein the echo function is converted and stored with a second lower resolution or no echo function is converted and stored for the remaining second portion of the entire level measurement range. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A pulse radar level gauge, comprising:
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a microwave transducer configured to generate microwave pulses, the microwave transducer being arranged in a tank containing a material and a top surface of the material providing a reflective surface to reflect the microwave pulses; a transmitter; a microprocessor, the microwave transducer being coupled to the microprocessor via the transmitter, and the microprocessor controlling the transmitter to excite the microwave transducer to emit the microwave pulses; a receiver configured to receive an electric signal based upon reflected microwave pulses or echo pulses, the receiver having an amplifier and an envelope detector; and a converter configured to generate a digital echo profile, wherein the microprocessor executes an algorithm to identify a true echo from the top surface of the material and to calculate a range of the reflective surface. - View Dependent Claims (10, 11)
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Specification