Electronic multi-purpose material level sensor
- Livermore, CA
The present electronic multi-purpose material level sensor is based on time domain reflectometry (TDR) of very short electrical pulses. Pulses are propagated along a transmission line that is partially immersed in a liquid, powder, or other substance such as grain in a silo. The time difference of the reflections at the start of the transmission line and the air/liquid interface are used to determine levels to better than 0.01 inch. The sensor is essentially independent of circuit element and temperature variations, and can be mass produced at an extremely low price. The transmission line may be a Goubau line, microstrip, coaxial cable, twin lead, CPS or CPW, and may typically be a strip placed along the inside wall of a tank. The reflected pulses also contain information about strata within the liquid such as sludge-build-up at the bottom of an oil tank.
- Research Organization:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- DOE Contract Number:
- W-7405-ENG-48
- Assignee:
- Regents of University of California (Oakland, CA)
- Patent Number(s):
- US 5609059
- OSTI ID:
- 870854
- Country of Publication:
- United States
- Language:
- English
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High accuracy electronic material level sensor
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Related Subjects
multi-purpose
material
level
sensor
based
time
domain
reflectometry
tdr
electrical
pulses
propagated
transmission
line
partially
immersed
liquid
powder
substance
grain
silo
difference
reflections
start
air
interface
determine
levels
01
inch
essentially
independent
circuit
element
temperature
variations
mass
produced
extremely
price
goubau
microstrip
coaxial
cable
twin
lead
cps
cpw
typically
strip
placed
inside
wall
tank
reflected
contain
information
strata
sludge-build-up
bottom
oil
reflected pulses
material level
domain reflectometry
temperature variations
level sensor
transmission line
coaxial cable
electrical pulses
inside wall
time domain
circuit element
temperature variation
partially immersed
time difference
electrical pulse
reflected pulse
multi-purpose material
liquid interface
mass produced
electronic multi-purpose
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