SENSORS FOR THE DETECTION OF THERMAL EVENTS
Our sensors are made of metal parts that are identical in nature to the mould material in which they are installed. They open to the inner wall of the mould for an almost instantaneous detection of the thermal phenomena occurring there.
The measuring principle of these sensors is based on the modelling of the transient heat transfer within the sensor (resolution of the heat conduction equation) and the formulation of its associated inverse problem. The reverse problem is to reconstruct the density of heat flux received by the wall, the surface temperature of the wall, based on measurements of temperatures distant from it.
The heat exchange coefficient between the mould and the material is measured by a device comprising a sensor for measuring the heat flux density and the surface temperature of the mould, a pyrometric probe measuring the temperature of the material being processed and a post-processing software.
Thermal event detection sensor: application to blow molds