Table of Content
- How Thermography Testing Works?
- Types of Thermography Inspection
- Real-World Applications of Thermography Testing
- Challenges and Limitations of Thermography Testing
- Key Takeaways
Thermography testing in NDT leverages infrared technology to identify temperature variations on the surface of objects. What is the purpose of thermography? This approach is valuable for industries needing efficient, non-invasive methods for identifying faults, weaknesses, or potential hazards in equipment and structures. By producing thermal images, thermography testing operators visualise heat distribution and identify hidden issues such as electrical faults, leaks, or structural weaknesses. Due to its precision, cost-efficiency, and safety, this technique finds applications in diverse sectors, from aerospace to healthcare.
What is thermography testing? Thermographic images provide immediate results, allowing inspectors to analyze conditions and make quick decisions. Additionally, thermography NDT Testing helps identify potential hazards, such as electrical faults or structural weaknesses, preventing accidents and protecting personnel and assets.
How Thermography Testing Works?
Thermography Testing involves using an infrared camera to capture thermal energy, which every object emits at varying intensities based on its material properties, environmental conditions, and the presence of potential faults. This method visualizes temperature variations as thermal images, known as thermograms, with colours representing different heat intensities. These images allow for an analysis of hotspots, cold spots, and thermal anomalies, which can signify problems such as electrical faults, insulation gaps, or material defects.
The principle of thermography is based on the fact that different materials emit infrared radiation at different rates, allowing for the detection of temperature variations. By analyzing these variations, thermographers can pinpoint areas of concern and address them before they escalate into larger issues.
Types of Thermography Inspection
Thermographic inspection can be broadly categorized into the following categories based on the source of thermal excitation. Thermal inspection classifications explained as follows:
1. Passive Thermography
This NDT Method involves scanning the component during its operation or Immediately after the operation (e.g. Running motor shaft), It does not require an external heat source for heating, it uses the heat generated in the material during its operation.
2. Active Thermography
This method requires an external heat source to heat the component and monitor the flow of heat inside the material.
3. Flash Thermography
This method uses flashes of light, to identify the discontinuities that obstruct the flow of heat inside the material.