Authors : Mehdi Asghari ASL and Ali Reza Erfanian
Abstract: Infrared scene generator produces thermal images using heated elements. In this study, an infrared scene generator using SMD resistor arrays has been designed and built. The size of resistor array is 50×50 pixels. The temperature resistance control is in current form. The maximum temperature and the radiated power of one pixel of the array reach 43°C and 50 mW, respectively. Different patterns and images were sent to infrared scene generator for testing. The images were displayed by infrared scene generator. Finally, electro-thermal behavior modeling of one pixel of the resistance array has been done in various fields. This modeling has been done with Software PSPICE. The results of the modeling are shown in chart. Of results of this modeling can be referred to reduced thermal time constant by increasing the voltage applied to the resistance. The minimum time constant for one pixel is 603.8 msec. Another, result of modeling is that the majority of applied power is transferred to board by conduction. In fact what was expected in the electro-thermal behavior of resistance was accomplished in this modeling.
Mehdi Asghari ASL and Ali Reza Erfanian, 2017. Designing and Modeling of an Infrared Scene Generator Using SMD Resistor Arrays for Use in the Simulator of Hardware in the Loop. Journal of Engineering and Applied Sciences, 12: 1050-1059.