Understanding Infrared Thermography Reading 3

It is not unusual to find line scanners at multiple locations in a process with all
of them linked to the host computer. In the 1990s, infrared line scanners
based on a linear focal plane array came into use. This type of instrument
frequently uses an un-cooled array of thermal detectors radiation thermopiles.
This scanner has no moving parts. The linear array is oriented perpendicular
to a process or a target moving at a uniform rate. The scanner output may be
used to develop a thermograms or the data for each pixel can be fed directly
to a host computer and used to monitor and control the process. Instruments
of this type have been used to monitor moving railroad cars for overheated
wheels and brake assemblies.
Charlie Chong/ Fion Zhang