可见近红外波段光谱辐射采集系统的设计与应用

针对目前卫星遥感器进行场地定标的光谱观测仪器的应用需求，设计了可见近红外波段(0.4 μm~1.0 μm)的光谱辐射采集电路系统，并结合光谱辐射采集模块进行了应用与数据分析。重点介绍了线阵探测器的选型与驱动需求，并完成了基于STM32微处理器的设计。结合辐射观测需求，在信号处理部分使用仪表放大器运放对探测器的模拟输出信号进行处理，并采用STM32内部的A/D转换器采集。分析数字信号输出的结果，该辐射测量电路系统的的采集数据达到了1 LSB的数据精度(≤0.8 mV)。探测器电路系统应用到光谱辐射采集模块中，进行了户外应用与数据分析，光谱辐照度比对结果的偏差小于5%。光谱辐照度的比对结果证明整个系统可以直接进行产品应用，满足野外辐射测量数据的可靠性获取。

Design and application of visible-near infrared band spectral radiation acquisition system

Aiming at the application requirements of spectral observers for test site calibration of satellite remote sensors, we designed a spectral radiation acquisition circuit system with visible near-infrared (0.4 μm~1.0 μm), and conducted the analysis on the application and data combining with the spectral radiation acquisition module. We mainly introduced the selection and driving requirements of the linear array detectors, the design based on STM32 microcontroller unit (MCU) was completed. According to the radiation observation requirements, we processed the analog output signal of the linear sensor by instrumentation amplifier in the signal processing section, and used the A/D converter in STM32 for collection.By analyzing the results of digital signal output, the data collection of the radiation measurement system has achieved the accuracy of 1LSB (less than 0.8 mV). Furthermore, we applied the detector circuits system to the spectral radiation acquisition module, and carried out the outdoor application and data analysis. Results show that the deviation of the comparison result of spectral irradiance is less than 5%. The comparison results of the spectral irradiance prove that the whole system can be directly applied to the product and meet the reliability acquisition of field radiation measurement.