Battelle

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Battelle Ultrasonic Liquid Level Monitor
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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 displays as tank empties from 24 to
2.5.
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Contact Walter C. Weimer, Manager Process
and Measurement Technology Battelle, Pacific
Northwest Division walter.weimer_at_pnl.gov (509)
375-6922 Technical Contacts Richard
Pappas richard.pappas_at_pnl.gov (509)
375-4546 Scott Cooley scott.cooley_at_pnl.gov (
509) 375-3604 Don Daly ds.daly_at_pnl.gov (509
) 375-4365