红外, 2016, 37 (6): 19, 网络出版: 2016-09-12  

高稳定度紫外LED定标的可行性分析与测试

Feasibility Analysis and Test of High Stability UV LED Calibration
金辉 1,2,*陆萌 1尹达一 1
作者单位
1 中国科学院上海技术物理研究所,上海 200083
2 中国科学院大学,北京 100049
摘要
为了满足紫外遥感器星上定标的高稳定度、小型化、低功耗 的应用需求以及紫外发光二极管(Light Emitting Diode, LED)定标在工作电流的典型值为200 mA时的稳定度不大于1‰、稳定 时间小于3 min的技术指标要求,提出了用基于FPGA的数字控制电路驱动紫外LED发 光并用增量式比例-积分-微分(Proportional-Integral-Derivative, PID)进行闭环控制的方法。对紫外LED的电流稳定度进行了测试,获得了电流大 小随时间变化的误差关系。测试结果表明,该系统可以使紫外LED上的电流在3 min内 实现稳定,其稳定度达到0.2‰,满足星上紫外定标的要求。
Abstract
To meet the application requirements of high stability, miniaturization and low power consumption of ultraviolet (UV) sensors in space calibration and the technical indexes such as the stability less than 1‰ and stable time less than 3 minutes when the UV Light Emitting Diode (LED) calibration is carried out with a typical current of 200 mA, a method for using a digital control circuit based on FPGA to drive the UV LED and using incremental Proportional-Integral-Derivative (PID) for close-loop control is proposed. The current stability of the UV LED is tested and the error of current changing with time is obtained. The test results show that this system can make the UV LED be stable in 3 minutes with the stability of 0.2‰ which can meet the requirement of space UV calibration.

金辉, 陆萌, 尹达一. 高稳定度紫外LED定标的可行性分析与测试[J]. 红外, 2016, 37(6): 19. JINHui, LU Meng, YIN Da-yi. Feasibility Analysis and Test of High Stability UV LED Calibration[J]. INFRARED, 2016, 37(6): 19.

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