Thermal model generalization of infrared radiation sensors

Abstract

In many theories and applications, generalized models can give a good head start for further researches where the implementation of new elements and/or boundary conditions could become quite complex. In this paper the development of a compact thermal model of an infrared sensor will be presented. This thermal model includes not just the thermal resistances and capacitances of the sensor but the radiative and convective thermal resistances to the ambient (acts as thermal ground) and between the sensor plate and the heat source (thermal transfer impedance). The article deals with the limitation of the linearization and applicability of this model. Further aim is to present the generalization and creation of a well applicable compact model which can be used in modelling of different thermal radiation sensors (e.g.: MEMS based sensor).