摘要
论述了非制冷红外焦平面阵列温度控制的重要性,并且简要提出温度控制原理,在此基础上提出使用MAX1978对TEC进行闭环自动控制的方案,并使用DAC芯片AD5665R作为温度参考电压输入芯片,使用I2C协议完成精确定点温度控制,实现了将非制冷红外焦平面阵列在不同的环境下稳定工作的要求。经测试验证系统温度的波动范围能够有效控制在±0.005℃,从而为提高焦平面阵列温度稳定性使非制冷性红外探测器适应不同的温度环境提供了一种实用方法。
This article discusses the importance of the temperature controlled by the uncooled infrared focal plane arrays, and briefly puts forward the theory of temperature control, on the basis of which, the article proposed that the MAX1978 can be used to carry on a closed loop control to TEC, and a DAC chip AD5665R should be used as a temperature reference voltage input chip. Besides, I^2C protocol should be used to accomplish the precise fixed-point temperature control. This system can keep the temperature fluctuate range at ± 0.005℃. It improves the temperature stability of focal plane arrays, and provides a practicality method which makes the uncooled infrared focal plane adapt to different environments.
出处
《红外技术》
CSCD
北大核心
2010年第6期353-355,370,共4页
Infrared Technology
基金
国家自然科学基金资助项目
