基于ADRC的高精度红外热成像仪温度控制系统设计

Design of Temperature Control System for High Precision Infrared Thermal Imager Based on ADRC

为了可以更加精准地控制红外热成像仪温度,设计一种基于ADRC的高精度红外热成像仪温度控制系统;由系统供电模块、探测器驱动模块、模数转换模块、视距估算模块、视频信号处理模块、外部存储模块、以太网传输模块和温度控制模块组成温度控制系统;利用自抗扰控制设计一种单轴控制器,将由时延带来的不确定性建模作为系统综合扰动的一部分,对扩张状态观测器以及总和扰动展开估计,同时在前馈通道对其展开补偿,消除时延对控制器产生的影响,将控制器应用于红外热成像仪温度控制中,获取高精度的红外热成像仪温度控制结果;通过实验分析证明,设计系统的帧频、响应波段、启动时间、供电范围和功耗测试结果分别为55 Hz、11μm、3.4 s、12 VDC和0.56 W,具有良好的红外热成像仪温度控制性能,可以满足提取高质量的红外图像的要求。

In order to control the temperature of infrared thermal imagers more accurately,a high-precision infrared thermal imager temperature control system based on active disturbance rejection control(ADRC)is designed.The temperature control system is composed of system power supply module,detector driver module,analog-to-digital conversion module,line of sight estimation module,video signal processing module,external storage module,Ethernet transmission module,and temperature control module.The ADRC is used to design a single axis controller,the uncertainty caused by time delay is taken as a part of the system comprehensive disturbance.The expanded state observer and total disturbance are estimated,and are compensated in the feedforward channel to eliminate the impact of time delay on the controller.The controller is applied to the temperature control of infrared thermal imagers and obtain high-precision temperature control results.Through experimental analysis,the results show that the frame rate,response band,startup time,power supply range,and power consumption of the designed system are 55 Hz,11μm,3.4 s,12 VDC,and 0.56 W,respectively.It has a good temperature control performance of infrared thermal imagers,and can meet the requirements of extracting high-quality infrared images.