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LaserNet Fines
Particle Counter andParticle Shape Classifier
LaserNet Fines SalesBrochure (pdf File)
LaserNet Fines was developed by Lockheed Martin Tactical Defense
Systems in cooperation with the Naval Research Laboratory for the Office of
Naval Research on its Accelerated Capabilities Initiative for
Condition-Based Maintenance.
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Application
Machine condition monitoring based on oil analysis has become an
accepted practice in any well run maintenance management program. With prior
knowledge of the wear metals and contaminants present in a lubricating
system, it may be determined if that equipment is operating properly or if
preventive maintenance is required. LaserNet Fines combines the standard oil
analysis techniques of particle counting and shape classification into a
single analytical instrument. Lockheed Martin Tactical Defense Systems and
Naval Research Laboratory combined space age imaging technology and neural
net shape classification into the development of LaserNet Fines. LaserNet
Fines can be used as a stand-alone analytical instrument, or in conjunction
with a full service oil analysis program. |
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Particle Counter
LaserNet Fines processes and stores thousands of images to obtain good
counting statistics. Particles are sized directly and put into size bins of
5 - 15 µm. 15 - 25 µm. 25 - 50 µm and greater than 50 µm. The direct imaging
capability of this instrument eliminates the need for calibration with a
test dust, the exact particle size distribution of which itself may be
questionable. Air bubbles are ignored and the laser is powerful enough to
process heavily sooted (black) oils.
Sample data output screen with particle counts and number of particles
according to wear mode (cutting, sliding fatique and oxides) |
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Particle Shape Classifier
The second capability of this instrument is shape recognition of all
particles greater than 20 µm by using a neural network. An algorithm is used
to sort particles into 4 categories, "cutting, fatigue, severe sliding and
oxides". The shape recognition software also does a test for circularity so
that bubbles and droplets are eliminated.
Sample data particle map output screen. Particles can be selected by
wear mode and highlighted for additioal size and shape data. |
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Operation
A powerful laser transmits a light pulse through a thin (approximately
90 µm thick) cell in which slowly flowing sample is sandwiched between two
glass plates. Using magnifying optics, an image of the sample is captured by
a CCD video camera and stored in computer memory. Each image is processed
with a raster scan analysis to identify individual objects. The objects are
then analyzed for maximum size and several shape characteristics which are
used to classify particles into mechanical wear classes. Each laser pulse
provides a single image frame to be analyzed, and the results of thousands
of frames are combined for a complete record of the sample under study.
Sample data output screen with capability to show trends by wear mode
and/or particle size ranges. |
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Features
o Small size and user friendly interface for shipboard or field
deployment
o Algorithms to perform shape analysis, wear particle identification and
machine condition assessment.
o Particles counted are greater than 5 µm
o Particles greater than 20 µm are classed by neural network as "cutting,
fatigue, severe sliding and oxides"
o Touch screen and LCD user interface
o Provides ISO 4406 cleanliness rating
o Provides NAS 1638 cleanliness rating
o Automatic adjustment for fluid darkness
o Built-in data-base for machine condition trendingLaserNet Fines
Military (LNF-M) version with built-in computer. |
LaserNet Fines Sales Brochure (pdf File)
LNF Demo S/W
Go to Technical papers
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ProTech
Import, Export & Maintenance
28 H Mostafa, AlGaish st. Cairo, 11111, Egypt,
Phone/ Fax +202-5883096 Mob. +20101792177
Email :sales@protechanalytical.com
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