STUDY
Core technical concepts and physical theories of ultrasonic testing (UT) and Non-Destructive Testing (NDT).
Advanced Phased Array Ultrasonic Testing (PAUT)
Basic Concepts of PAUT
Summarizes the principles, components, scan modes, and advantages over conventional UT of PAUT, which implements beam steering and focusing through electronic control of multiple piezoelectric elements.
PAUT Wedge and Couplant Roles
This article summarizes the physical roles and selection criteria of wedges and couplants for properly transmitting and receiving ultrasonic energy from PAUT probes to the test object.
UT vs PAUT Comparison
This article outlines the technical differences, including beam generation, inspection speed, and imaging capabilities, between Conventional Ultrasonic Testing (UT) and Phased Array Ultrasonic Testing (PAUT), along with selection criteria in the field.
PAUT Focal Law Principles and Design
This article explains the principles and practical design methods of Focal Laws, which are sets of time-delay parameters that determine the beam steering and focusing performance of PAUT equipment.
PAUT Defect Sizing Techniques
This article summarizes the representative sizing techniques (6dB Drop, TOFD, Tip Diffraction, etc.) used to evaluate the length, height, and depth of defects in NDT and PAUT environments.
TOFD Principles
Examines the physical principles of Time of Flight Diffraction (TOFD), analyzing tip diffraction mechanics, dual-probe geometry, and mathematical depth calculations.
FMC and TFM Principles
Examines the mathematical and digital signal principles of Full Matrix Capture (FMC) data acquisition and Total Focusing Method (TFM) pixel reconstruction algorithms.
Technical Advantages of PAUT over Conventional UT
Examines the acoustic, physical, and operational advantages of Phased Array Ultrasonic Testing (PAUT) compared to conventional single-element UT.
Weld Inspection and Geometry Weld Overlay Mapping
Examines the geometric physics of ultrasonic weld inspection, analyzing beam skip distance equations and computerized Weld Overlay positioning methods.
DSVision Practical & Quick Guides
Key Terminology & Application Guide
A comprehensive reference and glossary explaining the NDT abbreviations and parameters displayed in the DSVision software for practical field application.
Velocity (Sound Velocity) Calibration Guide
Provides step-by-step procedures and UI guides for precisely calibrating material sound velocity using DSVision's 2-Point Calibration.
Wedge Delay Calibration Guide
Provides step-by-step procedures and UI guides for precisely and automatically calibrating angular wedge delay using DSVision's Auto Wedge Delay.
Sensitivity Calibration Guide
Provides step-by-step procedures and UI guides for uniformly normalizing receiver sensitivity deviation across dozens of channels using DSVision's Auto Gain Normalization.
TCG Calibration Guide
Provides step-by-step procedures and UI guides for precisely compensating for depth-dependent ultrasonic attenuation using DSVision's Auto TCG.
Encoder Calibration Guide
Provides step-by-step procedures and UI guides for aligning scanner physical movement with software position data within 0.01mm error using DSVision's Encoder Calibration.
Weld Profile Setup Guide
Provides step-by-step procedures and UI guides for projecting various weld geometries and Heat-Affected Zones (HAZ) onto S-scans using DSVision's Weld Profile.
Data Visualization & Scan Interpretation
UT Data Representation (A/B/C-Scan)
Summarizes the principles, structures, and applications of the three scan visualization methods for data collected by Ultrasonic Testing (UT) equipment from an engineer's perspective.
A-scan Principles and Graph Interpretation
Based on global NDT technical standards, this article explains in detail how to interpret A-scan graphs—the foundation of ultrasonic technology—and the principles of real-time signal analysis.
Corrosion Mapping Principles
Examines the physical principles of ultrasonic corrosion mapping, analyzing grid coordinate acquisition, color map rendering, and Peak vs Edge gating methods.
B-scan Principles and Interpretation
Based on global NDT technical standards, this article explains the physical definition of B-scan and provides detailed methods for interpreting 2D cross-sectional graphs displayed on screens.
C-scan Principles and Interpretation
Based on global NDT technical standards, this article explains the physical definition of C-scan and provides detailed methods for interpreting planar projection (top-down view) graphs displayed on screens.
Ultrasonic Testing (UT) Basics
Basic Principles of UT
Summarizes the principles, characteristics, and industrial applications of Ultrasonic Testing (UT), a core non-destructive testing method, from an engineer's perspective.
Frequency Principles and Selection Criteria
Explains the physical definition of frequency, which is the first specification checked when performing Ultrasonic Testing (UT), and how the frequency selection impacts inspection results.
Calibration Principles and Reference Blocks
Explains the calibration process required to measure accurate defect locations and sizes via Ultrasonic Testing (UT), and the physical necessity of reference blocks.
Ultrasonic Sound Field and Advanced Physics
Examines the mathematical and physical principles of ultrasonic sound fields, analyzing near field limits, far field beam spread, and transducer frequency relations.
UT Advantages and Methods Comparison
Evaluates the physical and operational advantages of Ultrasonic Testing (UT) in comparison to Radiographic (RT), Magnetic Particle (MT), and Penetrant (PT) testing.