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针对传统半导体激光器冷却系统体积大、温控精度不高的特点,采用ARM9核心的S3C2410A微处理器配合单总线数字温度传感芯片DS18B20,在嵌入式Linux操作系统中采用模糊自整定PID算法对半导体制冷器进行精确控制,实现对半导体激光器中冷却水的恒温控制,保证半导体激光器的稳定工作。采用软件延时的方法,解决了半导体制冷系统在加热和制冷切换过快时制冷器易碎裂的问题。该系统体积小、响应快、使用方便,具有较高的可靠性和稳定性。且可使用直流电源供电。适于车载或机载使用。试验结果验证:该系统可在室温为0～35℃的环境中实现控温范围10～30℃,控温精度±0.1℃。
Aiming at the characteristics of traditional semiconductor laser cooling system such as large volume and low temperature control accuracy, the S3C2410A microprocessor with ARM9 core is used with DS18B20, a single-bus digital temperature sensor chip. In the embedded Linux operating system, fuzzy self-tuning PID algorithm Cooler for precise control, to achieve the semiconductor laser cooling water temperature control, to ensure the stable operation of semiconductor lasers. Using software delay method to solve the semiconductor refrigeration system in the heating and cooling switch too fast when the refrigerator fragile problem. The system is small, fast response, easy to use, with high reliability and stability. And can use DC power supply. Suitable for car or airborne use. Test results verify: The system can be in the room temperature 0 ~ 35 ℃ environment temperature range of 10 ~ 30 ℃, temperature control accuracy of ± 0.1 ℃.