Battelle Ultrasonic Liquid Level Monitor

Battelle

BattelleUltrasonic Liquid Level Monitor

Process and Measurement Technology

Battelle Ultrasonic Liquid Level Monitor Battelle Ultrasonic Liquid Level Monitor DemonstrationDemonstration

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• This demonstration illustrates the “Corner Reflection” approach to tank level measurement via ultrasound.

• The displays that follow contain plots derived from data collected while emptying a tank of water.

• Two ultrasound sensors were used to generate the liquid level data.

• Both sensors were mounted to the lower outside of the tank, one at a 60° angle from the horizontal, the other at a 45° angle.

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The upper section of each display portrays data from the 60° sensor

The lower section of each display portrays data from the 45° sensor

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The plots on the left-hand portion of each display portray the tank with:

• The fill level shaded in blue,

• The sound zone from the 60° sensor shaded in green, and

• The sound zone from the 45° sensor shaded in red.

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The plots in the upper right-hand portion of each display show signal data from the 60° sensor.

The plots in the lower right-hand portion of each display show signal data from the 45° sensor.

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Actual ultrasound signals with the intersections of the sound zones and the wall of the tank highlighted. These zones are where strong “corner shots” will occur.

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The correspondence between the colored shaded regions and the sections of the tank wall intersected by the sound zones.

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Enlarged views of signals as they pass through sound zones (highlighted) on tank wall.

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Note the strong “corner shot” signal that occurs when the fill level passes through the second sound zone along the tank wall.

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The enlarged views of the signal emphasize the dramatic pulse from the “corner shot”.

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Sequence of displaysas tank empties from 24” to 2.5”.

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Contact:

Walter C. Weimer, Manager

Battelle, Pacific Northwest Division

walter.weimer@pnl.gov

(509) 375-6922

Technical Contacts:

Richard Pappas richard.pappas@pnl.gov

(509) 375-4546

Scott Cooley scott.cooley@pnl.gov

(509) 375-3604

Don Daly ds.daly@pnl.gov

(509) 375-4365

Battelle Ultrasonic Liquid Level Monitor

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