Time of Flight Diffraction (ToFD) - Pre-course eLearning Package

Take your preparation for a classroom-based ultrasonic testing course with TES Canada to the next level with our pre-course eLearning packages. These optional add-ons offer a valuable opportunity to familiarize yourself with the key concepts that will be covered in the classroom, ensuring that you have the best possible chance of mastering the material and achieving certification.

Please note that this option is exclusively available to students enrolling in full courses. The comprehensive eLearning material will be accessible 30 days before the course start date, giving you ample time to build your confidence and knowledge before stepping into the classroom.

Maximize your learning potential and set yourself up for success by utilizing our pre-course eLearning packages for ultrasonic testing. Gain a solid foundation and approach the classroom with confidence.

This course is eligible for Continuing Professional Development (CPD) credit hours.

CPD: 40 Credit

Duration: 40 hrs

Price: CA$ 940.00

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 The eLearning part of this training course is divided in four modules:

  • Module 1:  Basics

  • Module 2:  ToFD Theory 

  • Module 3: Evaluation

  • Module 4: Review

  •  Each module covers a different topic related to the main theme of the course and has its own set of activities. The Theory section consists of articles and resources that provide an overview of the subject matter and key concepts. The Interactive Exercises allow users to practice applying their knowledge in real-life scenarios. Module 3: Data Analysis

  •  Module 4: Review

Each module contains:

  • Pages explaining the underlying theory

  • Videos explaining the theoretical and practical aspects of Time of Flight Diffraction (ToFD),
    Silverlight interactive exercises in which the student can build a set-up, practice calibration and scanning and learn to evaluate real data        

When you have booked your training, you will receive an email notification with your login details. You will then have 30 days before the course start date to go through the modules. 

SECTION 1: Basics

• NDT

• Sound versus Ultrasound

• Distance, velocity, cycle, material density

• Sine wave, frequency, wavelength

• dB system

• The shell of an ultrasound instrument, TOFD probes, TOFD wedges

• Pulser/receiver, square pulse

• Wave propagation, scattering, absorption, energy spreading

• Beam, sound field, beam diameter

• Through transmission, pulse echo, angle beam, immersion, PAUT

• A-Scan

• Structure and qualification of a procedure, training, acceptance criteria

• Calibration blocks, couplant

• Marking on part, probe positioning

• Naming files, storing data

• Section’s test

SECTION 2: ToFD Theory

• Butt welds

• Digital instrument, pulser/receiver, digitizer, filters, gain

• Probes, frequency spectrum, signal waveform

• Wedges, hard wedges

• Scanner, encoder

• Huygens’ principal, diffraction

• Snell’s law, incident vs. refracted, critical angles

• TOFD A-Scan, phase shift, phase difference, averaging

• PCS, transit time, depth calculation, height calculation, position uncertainty

• Beam spread, beam spread in-wedge, beam spread in-part, frequency spectrum

• Lateral wave, backwall, mode-converted backwall

• Dead zones, accuracy, resolution

• B-Scan, gray scale

• Whisker effect, parabolic cursors

• Non-parallel and parallel scans

• Multiple scans

• Influence of frequency on coverage, dead zones

Phasex Online Trainings 2023 Rev5

• Influence of wedge angle on time scale, coverage

• Influence of PCS on dead zones, resolution, coverage

• How to optimize the digitizing frequency, filters, averaging, time window, sensitivity,

PRF

• Calibration of the beam index point, velocity

• Scanning speed

• Wedge delay calibration, lateral wave straightening, lateral wave removal

• Interactive exercises

• Section’s test

SECTION 3: Evaluation

• B-Scan perspective

• Lateral wave, backwall and mode-converted backwall signals

• Effect of beam spread on depth and the backwall signal

• Indication classification, probe position vs. height, angle vs. height

• Geometrical indications, double-V welds, pipes misalignment, different wall thickness

• Data quality, calibration, basic analysis, detailed analysis

• Signal start, grouping, point-like indications

• Height and depth, top-surface breaking, bottom-surface breaking, embedded

• Length and position, parabolic shape, elongated and curved

• Interactive viewer, top-surface breaking, bottom-surface breaking, embedded

• Interactive exercises

• Section’s test

SECTION 4: review

• Hardware

• Scan & Views

• Basic Theory

• Setup

So that your computer can run the Phased Array eLearning modules you will need the following basic systems:

Operating System
Windows: 10 and higher

Browser
Chrome or Edge

Internet connection:

A decent internet connection (5 Mb/s) 

Taster

To get an idea of what you can expect when you begin the course, and view some helpful tutorial videos , click the link below:

View the course taster

Please use the latest version of the browser Internet Explorer with Silverlight installed to view the tasters. Videos are best seen in full screen mode, exercises must be in full screen mode to work.