Simulation of thermal fields of sensors supported by an image processing technology
Pavel Nevřiva, Zdeněk Macháček, Jan Krňávek · 2008
The accuracy and the reliability of sensors are often influenced by both external and internal thermal sources. In this paper, the analysis of thermal load of sensors is discussed. Physical models incorporating both the analyzed sensors and the ambient conditions similar to the real ones are built. Mathematical models are constructed and calculated to solve tasks described by physical models. Here, temperature fields in sensor are described by the Fourier partial differential equation. Differences between analytical and experimental results are used for adaptive correction of parameters of the mathematical model. At the physical model, sensor's surface temperature is measured by an infrared camera. At the mathematical model, sensor's surface temperature is generated by the ANSYS Workbench graphical generator. To compare the experimental and analytical results, images from both the IR camera and the ANSYS Workbench gg are transformed by a set of image processing functions. Both the general method and the case study results obtained on the tricky problem of the analysis of the heat transfer dynamics of the motor oil level gauge are presented.