Thermography
Thermography uses a camera containing large numbers of infrared sensors, which can detect and measure small temperature differences. The image showing these differences can be downloaded to and displayed on a PC, normally as a colour or grey-scale map.
There are two basic types of thermography – passive and active. In passive thermography, the camera is simply pointed at the test piece and from the thermal image a temperature map is constructed. Active thermography involves heating the surface of the object rapidly using an external heat source and observing how the temperature decays with time. Flaws in the material show up by variations in the temperature decay rate.
For more information www.twi.co.uk/technologies/ndt/conventional-ndt/thermogra...
If you wish to use this image each use should be accompanied by the credit line and notice, "Courtesy of TWI Ltd".
Thermography
Thermography uses a camera containing large numbers of infrared sensors, which can detect and measure small temperature differences. The image showing these differences can be downloaded to and displayed on a PC, normally as a colour or grey-scale map.
There are two basic types of thermography – passive and active. In passive thermography, the camera is simply pointed at the test piece and from the thermal image a temperature map is constructed. Active thermography involves heating the surface of the object rapidly using an external heat source and observing how the temperature decays with time. Flaws in the material show up by variations in the temperature decay rate.
For more information www.twi.co.uk/technologies/ndt/conventional-ndt/thermogra...
If you wish to use this image each use should be accompanied by the credit line and notice, "Courtesy of TWI Ltd".