光纤光源温度动态特性分析及控制

根据半导体热电致冷器(TEC)工作的基本原理,分析了光纤光源模块的温度动态特性,建立了与之对应的数学模型.对光源模块进行了实际实验测试,采用多点频率的工作电流驱动TEC模块,通过光源模块内部的热敏元件采样光源管芯温度的动态数据,用最小二乘法进行数据拟合,得到了与数学模型十分接近的结果,因此可以确定数学模型中的待定参数.采用 MAX1978单片TEC控制器,根据温度动态特性数学模型设计了最优的比例积分微分(PID)补偿网络,实现了光纤光源的温度控制系统,得出了TEC温度控制系统对光源有良好的控制精度和稳定性.

Temperature dynamic characteristics analysis and control of optic-fiber light source

According to the basic theory of the thermo-electric cooler(TEC),the temperature dynamic characteristics of the optic-fiber light source module was analyzed,and mathematics model was established corresponds to its.In the actual experimental test to light source module,the TEC module was driven by multi-point frequency of working current,and dynamic data of light source core's temperature was sampled with sensing component,and the dynamic data was calculated and fit with least-squares method,then the result was close to mathematics model,so the parameters of the mathematical model were determined.MAX1978 single-chip temperature controllers for Peltier thermoelectric cooler module was used,and the best proportional-integral-differential(PID)compensating network based on temperature dynamic characteristics mathematical model was designed,then the temperature control system of the optic-fiber light source was achieved,the result shows that TEC temperature control system can control the light source precisely and steadily.