Skip to content
  • ACCOUNT LOGIN
  • Cart
ABJ Drone Academy Logo
  • HOME
  • DRONE TRAINING
    • Drone Simulator Training
    • Primary Courses
      • Part 107 Prep – US
      • Drone Pilot – India
    • Specialist Courses
      • Surveying & 3D Modeling
      • Thermography Level 1
      • Thermography Level 2
      • Multispectral Imaging
      • Cell Tower Inspection
      • Photography
      • Videography
    • NDT Courses
      • NDT Techniques Level 1 Certification
      • NDT Techniques Level 2 Certification
    • Instructor Course
    • Online Shop
  • ABJ MEMBERSHIP
  • WEBINARS
  • WHY US
    • Why ABJ Academy
    • What You’ll Receive
    • Exclusive Bonuses
    • Our Guarantees
  • GLOBAL HQS
    • North America
    • Europe
  • NEWS
  • CONTACT
    • Career
  • ABJ Drone Techniques
    • Ultrasonic Techniques
    • NDT Synopsis Thermography
    • NDT Synopsis (UT)
    • Pulse Echo Inspection Technology
    • Power Line Inspection Technology
    • Phased Array Inspection Technology
    • Microscopy & Spectroscopy Inspection Technology
    • Air Coupled Inspection
    • Acoustic Emission
  • HOME
  • DRONE TRAINING
    • Drone Simulator Training
    • Primary Courses
      • Part 107 Prep – US
      • Drone Pilot – India
    • Specialist Courses
      • Surveying & 3D Modeling
      • Thermography Level 1
      • Thermography Level 2
      • Multispectral Imaging
      • Cell Tower Inspection
      • Photography
      • Videography
    • NDT Courses
      • NDT Techniques Level 1 Certification
      • NDT Techniques Level 2 Certification
    • Instructor Course
    • Online Shop
  • ABJ MEMBERSHIP
  • WEBINARS
  • WHY US
    • Why ABJ Academy
    • What You’ll Receive
    • Exclusive Bonuses
    • Our Guarantees
  • GLOBAL HQS
    • North America
    • Europe
  • NEWS
  • CONTACT
    • Career
  • ABJ Drone Techniques
    • Ultrasonic Techniques
    • NDT Synopsis Thermography
    • NDT Synopsis (UT)
    • Pulse Echo Inspection Technology
    • Power Line Inspection Technology
    • Phased Array Inspection Technology
    • Microscopy & Spectroscopy Inspection Technology
    • Air Coupled Inspection
    • Acoustic Emission

NDT Synopsis Thermography

Home » ABJ Drone Techniques » NDT Synopsis Thermography
NDT Synopsis ThermographyABJ Drone Academy2022-03-21T03:33:19+00:00

NDT Synopsis - Thermography

Thermography has been used for more than 30 years but is still a developing diagnostic modality. The technology has improved recently, and thermography units are now affordable.

The human eye responds to visible light in the range of 0.4 to 0.75 microns, but the majority of infrared temperature measurements range from 0.2 to 20 microns.                          A thermal imager is able to focus this energy on to a detector much like a regular camera, except it responds to the infrared radiation rather than visible light.  Thermo graphic cameras usually detect radiation in the long-infrared range of the electromagnetic spectrum (roughly 9,000–14,000 nanometres or 9–14 μm) and produce images of that radiation, called thermograms.

Infrared energy is emitted, transmitted and reflected by an object; infrared cameras use algorithms to interpret the data to create an accurate interpretation of the operating temperature.This is explained in the formula            

Incident Radiant Power = Emitted Radiant Power + Transmitted Radiant Power + Reflected Radiant Power

There are two mutually exclusive approaches in thermography inspection     

Passive: – In which the features of interest are naturally at a higher or lower temperature than the background and no energy is introduced to the system being inspected. 

Active: – In which Technique external stimulus source (i.e., optical flash lamps, heat lamps, hot or cold air guns, etc.) is required to produce a thermal contrast between the feature of interest and the background. 

Infrared thermography techniques: –

There are mainly two classical active thermographic techniques based on optical excitation: lock-in thermography and pulsed thermography

Pulsed Thermography: Pulsed thermography (PT) the specimen surface is submitted to a short heat pulse using a high-power source such as photographic flashes. The duration of the pulse may vary from a few milliseconds (~2-15 ms) to several seconds depending on the thermophysical properties of both, the specimen and the flaw.

Lock-in Thermography: Lock-in thermography (LT) the specimen’s surface is periodically illuminated by one or several modulated heating sources, e.g., halogen lamps, to inject thermal waves into the specimen. The periodic wave propagates by radiation through the air until it reaches the specimen surface where heat is produced and propagates through the material.

ABJ Drone Training Courses Membership

What are you looking for?

Follow Us!

Drone Training and Featured Pages

Join the ABJ Academy Membership

Commercial Drone Simulator Training

Drone Training Courses Available

Why Choose ABJ Drone Academy

Drone Affiliate Program

Instructor Zone Access

Drone Services and Jobs

ABJ Renewables – Global Inspection Solutions

Drone Wind Turbine Inspection

Drone Solar Farm Inspection

Drone Powerline Inspection

Drone Pilot Network and Jobs

COPYRIGHT 2021 BY ABJ DRONE ACADEMY | ALL RIGHTS RESERVED | Privacy Policy | Drone Affiliate Program | POWERED BY XILLIONAIRE

Professional UAS Pilot Courses Dismiss

Non-Destructive Testing Techniques Course Level 1

Check out the new course 

Visit Website

We use cookies and third party services to improve your experience on our website. By browsing this website, you agree to our use of cookies. Agree
Go to Top