13 innerspec technologies
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1 2011
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temate PowerBox H
High-Powered Portable
Ultrasonic Instrument
ATA-NDT Forum,
September 28, 2011
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2 2011
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Table of Contents
Introduction to EMAT
Design Objectives and Equipment Specifications
Existing and Future Applications Normal Beam Inspections Guided Waves Properties Measurement Non-EMAT Applications
Innerspec Technologies, Inc.
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Introduction to EMAT
Technology
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Electromagnetic Acoustic Transducer (EMAT) is a fairly recent
ultrasonic technique that is rapidly growing
History:
First recorded Ultrasonic Testing experiment conducted
by Russian scientist J.Y.
Sokolov in 1929. First patent
for UT equipment in 1931
Initial experiments with EMAT UT in the 70s
First commercial applications of EMAT in the 90s
Great recent growth thanks to advancements in technology
and equipment
temate PowerBox H Introduction to EMAT Technology
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While Piezoelectric UT uses a crystal to generate the ultrasound,
an Electro Magnetic Acoustic Transducer (EMAT) generates the
sound in the part inspected
temate PowerBox H Introduction to EMAT Technology
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EMAT enjoys all the benefits of UT plus other particular
advantages
Dry Inspection
(no couplant)
Insensitive to
Surface
Conditions
Unique Wave
Modes Self-Calibration
Easy to Automate and Integrate in
Production
No Couplant Induced Errors
High Inspection Speeds (up to 60
m/s)
Capable of High and Sub-Zero
Temperatures
Capable of Inspecting
Rough, Dirty
(Oily/Wet),
Oxidized or
Uneven Surfaces
Capable of Generating
Horizontally
Polarized Shear
Wave Energy
Guided Waves (Especially
Advantageous for
Weld Inspection)
Sample to Sample Self-Calibration of
Signals on
Guided Waves
Accurate and Repeatable
Inspections
No need for Operator
Interpretation
Ultrasound is Generated in the Part Inspected
Easier Probe
Deployment
The angle of incidence does
not affect the
direction of
propagation
No Signal Variations from
Probe to Probe
Ultrasonic Technique
Volumetric Inspection Easy One-Side Access to
Difficult to Reach Areas
Meets UT Standards Safe
temate PowerBox H Introduction to EMAT Technology
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EMAT can be used on most metals and geometries for all the
standard UT applications
Type of Inspection Material Geometries
Flaw Detection
Points Seams Surfaces Volumes Thickness &
Distances
Material Properties
Nodularity Anisotropy Stress
Electrical
Conductors
Ferrous: Carbon Steel, Stainless
Steel, Nickel, Cobalt
Non-Ferrous: Aluminum, Copper,
Brass, Uranium and
most other metals
Discrete and
Continuous
Geometries
Plates (thin and thick)
Cylinders, Rods Tubes (round,
square or others)
Structural Elements
temate PowerBox H Introduction to EMAT Technology
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EMAT can generate unique wave modes such as Shear Horizontal
and Lamb
1 Practical generation is restricted to EMAT
2 Very efficient generation with EMAT
Boundary Beam
Orientation
Wave
Mode Technique
Main
Applications
Bulk
Normal
Longitudinal Piezo
EMAT Thickness and Velocity Measurements Flaw Detection Properties Measurement Shear
Horizontal EMAT1
Angled
Shear
Vertical
Piezo
EMAT Flaw Detection
Shear
Horizontal EMAT1
Flaw Detection, including austenitic materials
Guided
Surface Rayleigh Piezo
EMAT2 Flaw Detection (surface)
Volumetric
Lamb Piezo
EMAT2
Flaw (including Corrosion) Detection Velocity and Properties Measurements
Shear
Horizontal EMAT1
Flaw (including Corrosion) Detection Velocity and Properties Measurements
temate PowerBox H Introduction to EMAT Technology
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Design Objectives and
Equipment Specifications
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The goal was to develop the first high-power ultrasonic handheld
instrument with the capabilities of a high-end flaw detector
Design Goals
Capable of running any EMAT wave mode including:
Normal Beam (SH and L) Guided Waves (Rayleigh,
SH, Lamb)
Angled Beams (SH and SV)
Capable of multiplexing up to 8 sensors, EMAT and non-
EMAT sensors
Software and hardware features available in high-end
flaw detectors
Handheld and battery operated
temate PowerBox H
1 Channel tone burst (up to 5 cycles) with 8kW of power in two power settings (600Vpp and 1200Vpp)
100kHz to 6MHz Bandwidth Pulse/Echo and Pitch/Catch operation
Built in pulse/echo signal conditioning for 1.5-3MHz Signal conditioning attachment with independent tuning
modules to adapt to any type of coil configuration
1:8 Multiplexer attachment with slot for tuning module Tuning Modules permit matching any transducer including EMAT,
PZT (PVDF), air-coupled
A, B, C and Line Scan formats Amplitude, TOF and velocity readouts 3 Gates (Calibration, Flaw, Backwall) DAC Curves PC software to display and analyze results Remote control operation through ethernet Optional software modules for Stress, Bolt Load and multi-
channel measurements
2.72 Lbs (6Kgs) 4-8 hours of battery time
temate PowerBox H Design Objectives and Specifications
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Design Objectives and Specifications
temate PowerBox H System without and with Signal Conditioning
Attachment/Multiplexer
temate PowerBox H
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Existing and Future
Applications
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Existing Applications
UT Type Wave Type Applications
EMAT
Normal Beam
Thickness Measurement High and low temperatures (-30C to 650C) Coated, painted and rough surfaces (3-4mm lift-
off)
Flaw and corrosion detection
Guided Waves
Corrosion under supports with Shear and Lamb waves
Thin weld inspection (under 6mm) Surface inspections (strip, rolls, tubes, billets, weld
overlays)
Multi-Sensor
Normal Beam
Stress/anisotropy measurement Bold load with single and double wave mode (L and
SH)
Nodularity measurements Corrosion monitoring (8 Channel BAND)
Non-EMAT All High-power PZT (e.g. PVDF) Air Coupled
temate PowerBox H Existing and Future Applications
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Summary and Future Applications
First handheld ultrasonic instrument capable of generating up to 5 cycle tone-bursts at 1200Vpp30 times more power than a 400V high-end flaw detector!
Permits running all EMAT applications including normal beam and guided wavesreclaim surface waves!
Runs PVDF (polyvinylidene fluoride) sensors and air coupled transducers
Potential applications discussed during the show: Scribe lines Surface inspections Thin welds (engine casings) Thickness and corrosion measurements
temate PowerBox H Existing and Future Applications
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Innerspec Technologies, Inc.
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Our Company
Innerspec Technologies, Inc.
US company located in Lynchburg, VA with offices in Europe and China and representatives and distributors throughout the world
First EMAT (NASA) in 1989. First commercial EMAT in 1994
56 patents for EMAT applications and equipment
World leader in commercial applications of EMAT with over 200 integrated systems installed in 27 countries and the most complete line of equipment
temate and Rollmate product lines
temate PowerBox H
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