陷阱探测器温控装置的设计

陷阱探测器是太阳光谱辐照度仪中的核心部件，其响应率会随温度变化，为了保证在野外大温度范围内太阳光谱辐照度的长期高精度观测，需要对其进行自动的温度控制。提出了使用半导体制冷器(TEC)来进行温控的方法，分别设计了基于DSP和基于ADN8830两种温控电路来实现TEC的驱动控制，基于DSP的方法使用数字温度传感器DS18B20作为温度传感器，通过开关-PID算法产生控制信号来驱动TEC，基于ADN8830的方法使用热敏电阻作为温度传感器，采用内部的集成算法来进行温度控制。通过实验对两种温控电路的效果进行了比较测试，结果表明，相较于基于DSP的方法，基于ADN8830的温控方法简单且效率高，能够在-10℃～40℃的范围内，快速、有效地控制陷阱探测器的温度，使其稳定工作在25±0.12℃的范围内。

Design of Temperature Control of Trap Detector

The trap detector is the core component of solar spectral irradiance instrument, but its response rate changes with temperature. In order to ensure the long-term high-precision observations of solar spectral irradiance in the large temperature range field, the temperature of trap detector should be controlled automatically. The method using semiconductor thermoelectric cooler(TEC) to control temperature was presented, and two temperature control circuit based on DSP and the ADN8830 were designed to drive TEC. In the method based on DSP, the digital temperature sensor DS18B20 was used to obtain the temperature, and switch-PID algorithm was used to generate control signals to drive the TEC. The thermistor was used as the sensor, and the temperature was controlled by internal integrated algorithm in the method based on ADN8830. The experiments on the effect of the two circuits show that, the method based on ADN8830 was simple and efficient compared with the method based on DSP, which can control the temperature of the trap detector fast and effectively in the range from －10 ℃ to 40 ℃, and the temperature was stabilized within the range of 25 ± 0.12℃.