METHOD FOR ROBUST GAUGING ACCURACY FOR LEVEL GAUGES UNDER MISMATCH AND LARGE OPENING EFFECTS IN STILLPIPES AND RELATED APPARATUS
First Claim
1. An apparatus comprising:
- an interface configured to receive data identifying wireless signals reflected off material in a tank; and
a processing system configured to calculate a phase velocity of the wireless signals reflected off the material using the data and to identify a level of the material in the tank using the phase velocity.
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Accused Products
Abstract
A method includes transmitting wireless signals towards a material in a tank and receiving wireless signals reflected off the material. The method also includes calculating a phase velocity of the wireless signals reflected off the material and identifying a level of the material in the tank using the phase velocity. Calculating the phase velocity of the wireless signals could include identifying a plurality of linearly-spaced frequencies and performing linear interpolation using the data identifying the wireless signals to identify data points at the linearly-spaced frequencies. The identification of the data points at the linearly-spaced frequencies could represent the only interpolation operation performed during the calculation of the phase velocity and the identification of the level of the material. Moreover, a mismatch could exist between an inner diameter of a stillpipe through which the wireless signals are transmitted and a diameter of an antenna used to receive the wireless signals.
99 Citations
20 Claims
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1. An apparatus comprising:
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an interface configured to receive data identifying wireless signals reflected off material in a tank; and a processing system configured to calculate a phase velocity of the wireless signals reflected off the material using the data and to identify a level of the material in the tank using the phase velocity. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method comprising:
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transmitting wireless signals towards a material in a tank; receiving wireless signals reflected off the material; calculating a phase velocity of the wireless signals reflected off the material; and identifying a level of the material in the tank using the phase velocity. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A computer readable medium embodying a computer program, the computer program comprising:
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computer readable program code for receiving data identifying wireless signals reflected off material in a tank; computer readable program code for calculating a phase velocity of the wireless signals reflected off the material using the data; and computer readable program code for identifying a level of the material in the tank using the phase velocity. - View Dependent Claims (18, 19, 20)
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Specification