Infrared thermography

Question 1

What is the principle of infrared radiation?

Answer 1

Each body emits IR radiations, whose intensity and spectrum depends on the temperature of the observed object and on the intrinsic characteristics and surface of the object itself

Question 2

How does infrared thermography work?

Answer 2

A digital thermocamera is used that can process the IR signals received from an emitting body and convert them into thermal maps

Question 3

How is infrared thermography NDT carried out?

Answer 3

The test consists in measuring the surface temperature distribution of a material in response to a pulse of thermal origin. Any anomalies found in this distribution are indicative of a possible defects.

Question 4

What are the advantages of IR thermography?

Answer 4

• Contactless
• The measuring range is very wide

Question 5

What are the limitations of IR thermography?

Answer 5

• requires qualified operators.
• Cannot inspect materials with low emissivity
• high cost