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| 差分吸收光谱测量中LED光源恒温控制的实现 | |
| 引用本文： | 凌六一,谢品华,秦敏,胡仁志,郑尼娜.差分吸收光谱测量中LED光源恒温控制的实现[J].大气与环境光学学报,2013,8(1):60-65. |
| 作者姓名： | 凌六一 谢品华 秦敏 胡仁志 郑尼娜 |
| 作者单位： | 凌六一:中国科学院安徽光学精密机械研究所 中国科学院环境光学与技术重点实验室, 安徽 合肥 230031安徽理工大学电气与信息工程学院, 安徽 淮南 232001 谢品华:中国科学院安徽光学精密机械研究所 中国科学院环境光学与技术重点实验室, 安徽 合肥 230031 秦敏:中国科学院安徽光学精密机械研究所 中国科学院环境光学与技术重点实验室, 安徽 合肥 230031 胡仁志:中国科学院安徽光学精密机械研究所 中国科学院环境光学与技术重点实验室, 安徽 合肥 230031 郑尼娜:中国科学院安徽光学精密机械研究所 中国科学院环境光学与技术重点实验室, 安徽 合肥 230031 |
| 基金项目： | 国家自然科学基金项目(61275151)、 国家863计划(2009AA063006)资助 |
| 摘 要： | 提出了一种差分光学吸收光谱(DOAS)测量中LED光源的恒温控制方法。采用半导体制冷片作为控温元件来控制LED温度,应用PID算法动态调节半导体制冷片的工作电流,实现了DOAS测量过程中LED光源的温度恒定。介绍了恒温控制系统的硬件设计和软件流程,并对控温效果和LED谱的稳定性进行了测试。测试结果表明,提出的恒温控制方法能有效克服环境温度变化对LED光源温度的影响,温度控制精度达到了士0.1℃。在相同的测试条件下与无恒温相比,具有恒温功能的LED光源剩余噪声明显偏低,进一步验证了设计方案的可行性。 |
| 关 键 词： | LED DOAS 恒温控制 PID算法 |
| 收稿时间： | 2012/9/24 |
Realization of Thermostatic Control of LED as Light Source for Differential Optical Absorption Spectroscopy Measurements |
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| LING Liu-yi,XIE Pin-hua,QIN Min,HU Ren-zhi,ZHENG Ni-na.Realization of Thermostatic Control of LED as Light Source for Differential Optical Absorption Spectroscopy Measurements[J].Journal of Atmospheric and Environmental Optics,2013,8(1):60-65. | |
| Authors: | LING Liu-yi XIE Pin-hua QIN Min HU Ren-zhi ZHENG Ni-na |
| Affiliation: | 1 (1 Key Laboratory of Environment Optics and Technology,Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences,Hefei 230031,China; 2 Institute of Electric and Information Technology,Anhui University of Science and Technology, Huainan 232001,China) |
| Abstract: | A method of thermostatic control of LED as light source for differential optical absorption spectroscopy (DOAS) measurements is presented. A Peltier is used to control LED’s temperature and its working current is regulated through PID algorithm in order to keep LED’s temperature constant. Hardware design and software flow of thermostatic control system is demonstrated, and the thermostatic control effect and stability of LED’s spectrum are tested. The results show that the impacts of ambient temperature on LED temperature are effectively restrained and ±0.1℃ of control accuracy is obtained. Compared with the LED without thermostatic control under the same condition, the residual noise of the LED with thermostatic control is markedly lower, which also proves the availability of this method. |
| Keywords: | LED DOAS thermostatic control PID algorithm |
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