What types of industries and applications
use LVDTs?
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Prepared by Harold Schaevitz
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Click application title below for more information.
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- Post process measuring device for automatic cylindrical grinding
- Measuring leak down in brake calipers
- Final length check of tubing in automated air conditioning condenser
coil machine
- In-process measurements for automated grinding operations
- Thickness measuring in multiple locations of flywheel to insure
balance.
- Final height measurement of brass insert after insertion into plastic
intake manifolds for truck gasoline engines.
- Confirming installation of contacts in automated assembly of connectors.
- Thickness measurement of steel in assembly operation using two
LVDTs differentially.
- Automated cutoff operation of long 6” diameter tubing measuring
overall length
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- Displacement measurement of imbedded concrete anchors tested for
tensile, compression, bending strength and crack growth in concrete.
- Deformation and creep of concrete wall used for retaining wall
in large gas pipe installation.
- Dynamic measurement of fatigue in large structural components used
in suspension bridges.
- Down-hole application: measuring displacement (creep) of bedrock
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- OEM type LVDTs and VRTs for large and medium steam inlet valve to
measure position of stem for pre heating turbine and operation.
- Conditioning valves for large and medium steam turbines.
- Reheat and stop valves for large and medium steam turbines.
- Throttle valve positioning for large and medium steam turbines.
- Feed water boiler pump valve positioning.
- Natural gas fuel valve position for gas turbines for throttle control.
- Gas turbine guide vane actuator position feedback for throttle control.
- Turbine shell expansion.
- Monitoring hydraulic fluid level in reservoir of feed water pumps
in nuclear reactor core
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- Measuring final height placement for automotive wheel trim
- Measuring injector height for diesel engines
- Measure movement of specific features of foam core used in lost
foam casting process during sand compaction operation.
- Height measurement of screws after insertion into automotive door
assembly.
- Thickness measuring in multiple locations of fly-wheel to insure
balance.
- Expansion measurement of solid fuel rocket motor casing during temperature
testing.
- Providing indication and feedback position of rocket engine nozzle
actuators during testing.
- Controlling depth of hole during machining operations in a rotary
transfer machine.
- Hand operated gaging stations for measuring height of air conditioning
compressor part.
- final grinding dimensions of brake pads utilizing an air extended
LVDT.
- Dancer roll application for keeping controlled tension on material
used in tire manufacturing.
- Compressing operation of large bearings for railroad truck axle
bearings.
- Replacement of dial indicators monitoring the final thickness dimension
of disc brake pads.
- Verifying holes too small for detection with a proximity probe in
backing plate of disc brake pad
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- Monitoring and adjustment verification of die shut height vertically
mounted to die or die shoe externally.
- Monitoring of forming operations performed in die for quality of
part or automated servo adjustments
- Monitor final strip feed out position to maintain proper length
of parts and part position in progressive die.
- Servo motor position feed back in automated servo dies
- Material thickness in post and pre-forming operations
- Differential in-process measurement of 4’ wide coil on large
blanked fender panels.
- Measuring height of sealing radius in metal gasket.
- Measuring compaction of friction material in molding operation used
in the manufacture of brake pads
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- Measure displacement of thermostat valve stem for diesel truck engine
monitoring system.
- Displacement of diaphragm in automated whole blood processing equipment.
(LVDT base pressure transducer)
- Linear actuator feedback position used in boiler systems.
- LVDT incorporated into proportional valve assembly providing position
feed back.
- Blood-testing device measuring the displacement of blood cells as
they contract. Clinical usage, diagnosis of blood disorders.
- Brake pedal position for brake by wire system.
- Steer by wire system attached to rudder assembly.
- Measuring very small displacements for high performance automotive
drive and crankshaft shaft balancing machine.
- Measuring displacement of diamond tip to determine material hardness.
- Use of special LVDT with SAE fitting welded to one end rated at
1500 PSI for measuring displacement of piston stoke in variable rate
pump assembly.
- Providing position feed back of seat movement for damping device
in agricultural equipment. (reducing operator fatigue)
- Position feed back in high speed injection molding machine (die
closure)
- Measurement of die wear, high speed injection molding equipment.
- Position feed back for automated spot welding control system.
- Special unit used in linear actuator position feed back aircraft
ailerons.
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- Slice lip final positioning, maintaining thickness of slurry.
- Pulp refiner plate actuator position feedback to maintain plate
gap with variable loads of material.
- Pinch gap of rollers to control thickness of adhesive glue applied
to corrugation material used for shipping boxes.
- Angular displacement of dancer arm for position feedback to maintain
tension in roll.
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- Replacement of string pot in severe duty linear displacement valves
for water treatment plant.
- Monitor displacement of pneumatic valve in process of chemical
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- High vacuum environment measuring mirror alignment angle.
- High pressure, 5000 psi using specially designed spring loaded LVDT
+/- 1.00” used for feed back position of cylinder.
- Hermetically sealed spring loaded LVDT utilized for it's internal
hermetically sealed attributes holding pressure (350 psi) while making
expansion measurements.
- Spring loaded LVDT used on tensile testing machine to measure material
as it is compressed.
- Passenger automotive fuel tank, to measure expansion and contraction
displacements during fatigue testing.
- Position of fuel valve in testing gas turbines (hazardous location).
- Radial / axial expansion and contraction of soil samples.
- Testing dry cell batteries for maximum radial and axial crush displacement
before failure
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- R&D of suspension performance and profiling (linear travel)
- Shock absorber performance and profiling of characteristics
- Throttle position
- Steering position
- Active suspension systems
- Transmission gear indication
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