Abstract
A temperature control system based on thermoelectric coolers is designed in this paper for infrared CCD camera used to monitor burden surface of blast-furnace. The thermoelectric cooling system consists of a microcontroller module, a temperature sensor, a CCD camera, a thermoelectric cooler, a power amplifier and isolation module. The CCD camera with a temperature sensor is tightly mounted on the TEC cold surface. The microcontroller changes duty ratio of PWM signals with changes of the camera temperature to make working temperature of the CCD camera constant. The experiments show that the cooling system works well in temperature controlling
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