As the kiln rotates the thermal scanner records temperatures at each point of the kiln body. After each complete revolution, the data is analyzed and a temperature map of the entire kiln surface (thermal image) is generated. Knowing the temperature inside and on the surface of the kiln and using the thermal conductivity formula it is possible to estimate the thickness of the bricks as well as the thickness of the stuck clinker material ("coating").

Often one scanner is not enough to cover the whole surface of the kiln. In this case additional scanners are used. Also, depending on the kiln design and the room where the kiln is located (supporting rings, pillars etc.), parts of the kiln can be inaccessible to the scanners. Such areas are called "shadow zones". Pyrometers are used to monitor the temperatures of these areas. Data from all scanners and pyrometers are gathered together to form one composite map of the kiln surface condition.

To find out when the kiln made a complete revolution and the temperature map can be build IRT KilnMonitor needs a signal from the outside. A sensor that sends a signal after each complete revolution must be connected to the system. The signal is called "kiln-trigger". A complete revolution of the kiln is called a "lap".

Laps

After each full revolution (lap) IRT KilnMonitor system executes the following operations:

1.Kiln shell temperature map is constructed from temperature data received from scanners and pyrometers.

2.Envelope profile is constructed from the kiln shell temperature map.

3.Alarm zones are checked for alarm conditions, hardware outputs assigned to alarm zones are updated.

4.Envelope profile is checked for alarms, corresponding hardware outputs are updated.

5.Kiln shell image with information about alarms and measurements is saved to the history storage.

6.New kiln state data is sent to clients connected remotely.