Fluorescent image tracking velocimeter

Patent · Sat Jan 01 00:00:00 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: USDOE Pittsburgh Energy Technology Center (PETC), PA (United States)
• 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

Related Subjects

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