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Electro
Magnetic Acoustic Transducer (EMAT) is an
innovative inspection technique that is
already benefiting many industries around
the globe. With EMAT, inspections
that were once impractical or impossible
are now a reality.
EMAT technology is an Ultrasonic (UT) Non
Destructive Testing method that differs
from the traditional piezoelectric transducers
in the way the sound is generated.
In traditional ultrasound technology a piezoelectric
crystal is used to convert electrical energy
into mechanical vibration. The vibration
makes its way into the test piece via the
couplant.
An EMAT consists of a magnet and a coil
of wire and relies on electro-magnetic acoustic
interaction for elastic wave generation.
Using Lorentz forces and magnetostriction,
the EMAT and the metal test surface interact
and generate an acoustic wave within the
material. The material being inspected
is its own transducer, eliminating the need
for liquid couplant.
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EMAT provides all of
the capabilities of ultrasonic testing plus
some distinct advantages. These advantages
make it especially well suited for automated
applications in industrial environments.
An EMAT probe becomes a simple end-of-arm
tool that combined with the proper electronics
and software can be integrated into a production
line to provide reliable inspection without
human intervention.
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Using standard Ultrasonic Testing procedures
like Pulse-Echo, Attenuation or Time-Of-Flight
Measurement, EMAT can be adapted to perform
a variety of inspections in almost any kind
of metal and geometry. EMATs can easily
generate Rayleigh, Creeping, Shear Vertical,
Shear Horizontal, Longitudinal, Torsional
and Flexural wave modes in frequency ranges
from 100KHz to 12MHz.
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Type of Inspection |
Material
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Geometries
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Flaw
Detection
- Seams (2D)
- Surfaces (2D)
- Volumes (3D)
Thickness
& Distances
Material
Properties
- Hardness
- Nodularity
- Stress
- Anisotropy
- Others
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Electrical
& Magnetic Conductors
- Ferrous : Carbon Steel,
Stainless Steel, Nickel,
Cobalt
- Non-ferrous : Aluminum,
Copper, Brass, Uranium
& most other metals
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Discrete
& Continuous Geometries
- Plates (thin & thick)
- Cylinders, Rods, Tubes
(round, square or others)
- Structural Elements
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Behind our EMAT products is our proprietary temate® platform consisting of:
- State-of-the-art Electronics,
designed for high-power EMAT applications
- Custom Sensors custom designed
for the different applications
- Line Integration modules for
seamless integration and external
communications
- Exclusive temate®
Software
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For additional information on EMAT
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Copyright 2006, Innerspec Technologies, Inc. All rights reserved. |
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