Presentation_ Thermal Infrared Testing.pdf

THERMAL INFRARED TESTING
HANDBOOK OF NONDESTRUCTIVE EVALUATION
Escamilla Cruz Carlos Antelmo, Santiago Rodriguez Gabriel, Antonio
Corona Alan AND Bustamante Garcı́a Leonardo Josue
Instituto Tecnológico Superior del Occidente del Estado de Hidalgo
may, 2024
Carlos, Gabriel, Alan, Leonardo (ITSOEH) THERMAL INFRARED TESTING may, 2024 1 / 24

Contenido
1 INTRODUCTION
2 THEORY AND PRINCIPLES
3 EQUIPMENT AND ACCESSORIES
4 TECHNIQUES
5 APPLICATIONS

Content
1 INTRODUCTION
4 TECHNIQUES
5 APPLICATIONS

INTRODUCTION
Definition
Infrared thermography is a technique that allows temperatures to be mea-
sured remotely and without the need for physical contact with the object to
be studied, by capturing the intensity of infrared radiation emitted by the
bodies.
It is a tool used in preventive maintenance

Content
1 INTRODUCTION
4 TECHNIQUES
5 APPLICATIONS

THEORY AND PRINCIPLES
Thermal Energy
Latent Heat
Conduction
Convection
Radiation

Thermal Energy
It is the internal energy of a system that depends on its absolute tempera-
ture.

Latent Heat
Latent heat is the energy required by a substance to change its state without
changing its temperature.

Conduction
It is a form of heat transmission through body contact without transfer of
matter.
Figura: It is more present in metals.

Convection
It consists of the transmission of heat from the transfer of the heat-carrying
matter itself.
Figura: Example in the currents of covention.

Radiation
Transmission of energy through the emission of electromagnetic waves or
photons
Figura: The sun emits radiation through waves.

Content
1 INTRODUCTION
4 TECHNIQUES
5 APPLICATIONS

EQUIPMENT AND ACCESSORIES
Lens
Lenses serve to focus the incoming infrared radiation on the detector. Some
infrared lens materials are actually opaque to visible light.
Materials commonly used for lenses are germanium (Ge), silicon (Si),
and zinc selenide (ZnSe).

Detector
The radiation is focused on the detector, where it produces a measurable
response.
Materials commonly used for detectors are platinum silicide (PtSi),
mercury cadmium telluride (HgCdTe), and indium antimonide (InSb).

Processing Electronics
The response from the detector is processed electronically to produce a
thermal image, a temperature measurement, or both.

Controls
Various controls on the system allow for adjustments to control the input of
infrared radiation or the output of data. These typically include adjustments
to range and span, thermal level, polarity, emissivity, and other temperature
measurement functions.

Display
The processed data is output to a display, either an electronic viewfinder
or a liquid crystal display (LCD) screen. Most instruments can display the
thermal image in either grayscale or a color scale.

Data Storage
Data is typically stored either as a still digital image or as an analog video
image. Digital images are stored on floppy discs or PC cards. Digital voice
data can also be stored with an image on some systems as well.

Content
1 INTRODUCTION
4 TECHNIQUES
5 APPLICATIONS

TECHNIQUES
Comparative Thermography
The basic strategy used in many thermal applications is quite simply termed
“comparative thermography.” It is no more complex than comparing similar
samples or components under similar conditions.

TECHNIQUES
Thermal Maps
These thermal mapping techniques can reveal a very accurate and useful
temperature trend of past performance, it is important to remember that
trending only implies, rather than predicts, the future.
It has also been used extensively in the electronics industry to look at printed
circuit boards (PCBs).

Content
1 INTRODUCTION
4 TECHNIQUES
5 APPLICATIONS

APPLICATIONS
ELECTRONICS INDUSTRY
AEROSPACE APPLICATIONS
ELECTRICAL INSPECTIONS
MECHANICAL INSPECTIONS
REFRACTORY INSPECTIONS
STEAM TRAPS ND LINES
TANK LEVEL VERIFICATION
ROOF MOISTURE INSPECTIONS
BUILDING ENERGY SURVEYS

Thank you for your time

Presentation_ Thermal Infrared Testing.pdf

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