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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