Radar level gauge
First Claim
1. A method of operating a FMCW radar tank level gauge that measures a level in a tank by obtaining a set of phase shift data points of mixed transmitted waves and received waves, the method comprising:
- generating and storing a set of spectral data phase shift values including a received target marker indicating the level;
calculating an adaptive set of masking threshold phase shift values corresponding to at least a portion of the spectral data phase shift values;
comparing the adaptive set of masking threshold phase shift values with the corresponding spectral data chase shift values to identify at least one spectral data phase shift value associated with the level;
calculating the level of the tank from said at least one spectral data phase shift value; and
reporting the level of the tank.
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Accused Products
Abstract
A FMCW radar tank level gauge (14) that measures a level (13) in a tank (10) by obtaining a set of phase shift data points of mixed transmitted waves and received waves. The set of spectral data phase shift values has a received target marker indicating the level. An adaptive set of masking threshold phase shift values corresponding to at least a portion of the spectral data phase shift values are calculated. The adaptive set of masking threshold values are compared with the corresponding spectral data values to identify at least one spectral data value associated with the level. The level of the tank is calculated from at least one spectral data value and the level of the tank is reported.
84 Citations
6 Claims
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1. A method of operating a FMCW radar tank level gauge that measures a level in a tank by obtaining a set of phase shift data points of mixed transmitted waves and received waves, the method comprising:
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generating and storing a set of spectral data phase shift values including a received target marker indicating the level; calculating an adaptive set of masking threshold phase shift values corresponding to at least a portion of the spectral data phase shift values; comparing the adaptive set of masking threshold phase shift values with the corresponding spectral data chase shift values to identify at least one spectral data phase shift value associated with the level; calculating the level of the tank from said at least one spectral data phase shift value; and reporting the level of the tank. - View Dependent Claims (2, 3, 4, 6)
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5. A FMCW radar tank level gauge that measures a level in a tank by obtaining a set of phase shift data points of mixed transmitted waves and received waves, the gauge comprising:
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means for generating and storing a set of spectral data chase shift values including a received phase shift target marker indicating the level; means for calculating an adaptive set of masking threshold phase shift values corresponding to at least a portion of the spectral data values; means for comparing the adaptive set of masking threshold phase shift values with the corresponding spectral data phase shift values to identify at least one spectral phase shift data value associated with the level; means for calculating the level of the tank from said at least one spectral phase shift data value; and means for reporting the level of the tank.
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Specification