Post on 14-Apr-2018
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SUPOR TOFD Module
6-ch TOFD 1-ch TOFD
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2-ch TOFD Crawler
2/ 4/ 6 TOFD Modules are Available
4-ch or 6-ch TOFD Crawler
for Multi-channel TOFD Inspection
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111 TOFD Principle
222 SUPOR Instruction
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TOFD Principle
TOFD (Time of Flight Diffraction): It is an ultrasound inspection
method based on ultrasound diffraction, instead of wave amplitude.The basic feature is working with pitch and catch probes.
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TOFD Principle
Diffraction
Diffracted Wave
Diffracted Wave
Incident Wave
Reflected Wave
Low transmit energy for each direction;
The diffracted direction has no relationship with incident wave.
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TOFD PrincipleTOFD Typical Setup
Transmitting Probe Receiving ProbeLateral Wave
Upper End
Lower End
Bottom Wave
Workpiece
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TOFD Principle
Transmit Time Difference
Receiving ProbeY Y
dS
LW BW
Td
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White+
Black-
Amplitude
Time
White Black256 steps
TOFD PrincipleTOFD Waveform and Image Display
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1.Surface breaking Flaw in TOFD waveformdisplay
Transmitting Probe Receiving Probe
Crack Wave
Bottom Wave
BW
Disconnected Lateral Wave
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2.Bottom Flaw in TOFD waveform display
Transmitting ProbeReceiving Probe
Lateral Wave
LW
Disconnected Bottom Wave
Crack
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3.Hidden Flaw in TOFD waveform display
Transmitting ProbeReceiving Probe
Lateral Wave
LW
Bottom Wave
BW
Refracted Signal
Reflected Signal
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Lateral Wave
LW
Bottom Wave
BW
Refracted Signal
Reflected Signal
4. Gas Hole Flaw in TOFD waveform display
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Gas Hole Flaw TOFD imageGas Hole Flaw
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Image without flaw Image with flaws
TOFD Image Display
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z High inspection rate for internal flaws in welds
z Have long scan length
z High accuracy in flaw depth and height measurement
z Fully recorded
z Combined with conventional UT may achieve 100%
welding line coverage.
TOFD Advantage
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SUPOR Instruction
zModular Design
z Easy Operation
z TOFD Crawler
z Powerful Data Analysis
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Modular Design
6-ch TOFD Module
SUPOR can provide 2/4/6 TOFD modules
Features of TOFD Module
zMulti-channel TOFD function with 2/4/6 channels
for selection
z0.5MHz~20MHz band width
zNegative square wave transmit pulse, adjustable
transmit voltage and pulse width
zData Analysis: Lateral Wave / Bottom Wave
Straightening, Lateral Wave/ Bottom Wave
Filtering, Contrast Correction, Gain Correction,
Flaw Height and Length Measurement
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knob
Power KeyFunction keys
Alarm output, encoder, Ethernet, USB and VGA portsAppearance
indicator
Touch Screen
RuggedAppearance
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ParametersParameters
SubSub--
menusmenusData displayData display
MenuMenu
StatusStatus Readings : Info fieldsReadings : Info fields
SUPOR Interface
User-friendly Interface
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Overview of TOFD Wizard:
This TOFD Wizard gives instructions to the operators on how to
set up TOFD imaging parameters when testing objects. It is very
convenient and user friendly.
TOFD Scan Operation Procedure
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The Imaging wizard includes 5 steps:
Step 1- Setup channel number
Step 2- Workpiece coverage simulation
Step 3- Setup wave parameter
Step 4- Setup encoder parameter
Step 5- TOFD scan parameter
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Overview of TOFD Wizard (One channel)
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Overview of TOFD WizardStep 1- Select channel number for scan
This step is for selecting channel number for
scanning, or opening existing (previously saved)
TOFD wizard setup parameter . The operators may select channel number,
subject to the thickness of the test object or
relevant codes, or make changes to the savedTOFD wizard setup parameters.
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Overview of TOFD Wizard
Step 2- Workpiece coverage simulation
It simulates the propagation path of ultrasound in
the test object basedon sound velocity in the test
object, TOFD probe and wedge parameters set up
by operators, enabling the operators to know the
ultrasound propagation in the test object visually
and to finish preparation of test technique and
inspection.
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Overview of TOFD Wizard
Step 3- Setup wave parameter
Calibration Zero
PCS (Probe Central Separation) Setup
Calibrate Material Velocity
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Overview of TOFD WizardStep 4- Setup encoder parameter
Make sure the encoder is calibrated before scanning
Encoder Setting
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Overview of TOFD WizardStep 5- TOFD scan parameter
TOFD scan direction
Scan line average number
Scan channel distance setup
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TOFD Image
After finishing the step 5 setup, the system goes to TOFD
imaging screen. Move the crawler, the screen displays a
continuous TOFD image.
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Lateral wave/ Bottom wave straightening
zTOFD Data Analysis
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Lateral wave/ Bottom wave filtering
Original Image Image after lateral wave filtering
zTOFD Data Analysis
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Contrast Correction
Image after contrast correction
zTOFD Data Analysis
Original Image
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Gain Correction
Image after increasing 6dB gain
zTOFD Data Analysis
Original Image
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Flaw marking and measurement
Flaw Marking and Measurement Parabolic Cursor Fitting
zTOFD Data Analysis
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zTOFD Data AnalysisAs a professional computer analysis software, SuporUp can perform length
measurement, straightening, filter, recovery, local zoom, SAFT, contrast
adjustment and gain post processing on the TOFD image.
SuporUp TOFD (6 Channel) File Measurement
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z6-ch TOFD Test Report
Screenshot and detailed infomay be losslessly stored to
SuporUp facilitating report
editing and data management.
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zApplication reference
Application on plate welding
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On-site Application
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Specification for 6-ch TOFD
Imaging Mode TOFD
System
Channel 6
Probe Connector
TypeLEMO 00
Probe ConnectorNumber
12 pcs
Max. Supporting
Elements
12
Pulser
Pulser Spike, square
PRF 100Hz2000Hz
Pulse Voltage 50V500V, min. step 50V
Pulse Width 10ns600ns
Damping 4 levels
Receiver
Gain 0dB110dB, step: 0.5/2/6/12
Bandwidth 0.5MHz25MHz
A/D Sampling Rate 200MHz
Rectification Positive, Negative, Full, RF
Filter 16 levels available
Reject 0%80%
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Imaging Mode TOFD
Scan
Scan Type A/TOFD
Image Wizard Available
Trigger Mode Time-based / Encoder
Scan Length Max. 2m
Calibration
Range 12 mm15000 mm
Material Velocity 1000 m/s10000 m/s
Display Delay -10 mm10000 mm
Probe Delay 0 us200s
Auto Calibration Velocity, probe delay
ManualCalibration
Velocity, probe delay
Gate
Test Point
SelectionPeak / flank / J flank
MeasurementDual gates: to measure echo amplitude, sound path, horizontal distance, vertical distance, distancebetween gates.
Gate Start Full range
Gate Width Full range
Gate Height 1090%
Specification for 6-ch TOFD
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Imaging Mode TOFD
Measurement
Curve Function DAC
Auxi liary Funct ionA-scan echo freeze, auto calibration, angle measurement, peak memory, parameter output, AWS
D1.1/D1.5, USB storage, curve surface correction.
Alarm Signal Signal and sound alarm
Display Measure
Value8 positions can be user-defined.
Data AnalysisLW/ BW straightening, LW/ BW removal, defect height and length measurement, contrast adjust,gain adjust
Testing Index
Time base
Linearity0.5%
Vertical Linearity 3%
At tenuatorPrecision
12dB1dB
Dynamic Range 36dB
Specification for 6-ch TOFD
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Thank you