Fluorescent image tracking velocimeter

Patent · Sat Jan 01 04:00:00 EST 1994

OSTI ID:869413

Shaffer, Franklin D ^[1]

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1. Library, PA

A multiple-exposure fluorescent image tracking velocimeter (FITV) detects and measures the motion (trajectory, direction and velocity) of small particles close to light scattering surfaces. The small particles may follow the motion of a carrier medium such as a liquid, gas or multi-phase mixture, allowing the motion of the carrier medium to be observed, measured and recorded. The main components of the FITV include: (1) fluorescent particles; (2) a pulsed fluorescent excitation laser source; (3) an imaging camera; and (4) an image analyzer. FITV uses fluorescing particles excited by visible laser light to enhance particle image detectability near light scattering surfaces. The excitation laser light is filtered out before reaching the imaging camera allowing the fluoresced wavelengths emitted by the particles to be detected and recorded by the camera. FITV employs multiple exposures of a single camera image by pulsing the excitation laser light for producing a series of images of each particle along its trajectory. The time-lapsed image may be used to determine trajectory and velocity and the exposures may be coded to derive directional information.

• Research Organization: Pittsburgh Energy Technology Center
• Assignee: United States of America as represented by Department of Energy (Washington, DC)
• Patent Number(s): US 5333044
• OSTI ID: 869413
• Country of Publication: United States
• Language: English

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allowing
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carrier
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coded
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detectability
detected
detects
determine
direction
directional
emitted
employs
enhance
excitation
excitation laser
excited
exposures
filtered
fitv
fluoresced
fluorescent
fluorescent image
fluorescent particles
fluorescing
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gas
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image tracking
images
imaging
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laser
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laser source
light
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liquid
main
measured
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medium
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motion
multi-phase
multi-phase mixture
multiple
multiple-exposure
near
near light
observed
particle
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particles
phase mixture
producing
pulsed
pulsing
reaching
recorded
scattering
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series
single
source
surfaces
time-lapsed
tracking
tracking velocimeter
trajectory
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velocity
visible
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