Design and implementation of infrared scene simulation system based on resistor array
In order to test infrared imaging system more conveniently, an universal infrared scene simulation system was implemented. An indigenous 128×128 pixels MOS resistor array chip was used for scene generation component of the system, while the FPGA was used for the high-speed driving circuitry of the resistor array chip. The IR radiance characteristic was computed with object parameters on PC using OpenGL in real-time. The scene data was transferred to FPGA control circuit via Ethernet. The control circuit refreshed MOS resistor array 200 times per second. The scene data was refreshed 50 times per second. A temperature-controlled system for resistor array chip was designed to guarantee the ultimate contrast of the scene. The whole system has the characteristic of briefness, low cost and high extendibility, so it is easy to be upgraded and can integrate with various infrared detection systems.