基于nRF51822的新型集成化激光雾霾检测系统的研制
发布时间：2018-10-25 14:02
【摘要】：雾霾天气出现频率的日趋增加,社会生活、生态环境、人体健康等各个方面造成很大的危害,而大气中各种悬浮颗粒物含量的超标是造成雾霾天气的首要原因。光散射法相对于其他大气颗粒物检测方法具有测量速度快、测量精度高,可在线非接触测量等优点,已经成为大气颗粒物检测的主要方法。详细介绍了光散射法的理论基础,对米氏散射理论及基于米氏散射原理的测量颗粒物浓度的原理进行了深入分析,在理论上论证了基于米氏散射原理的激光雾霾检测系统的研制方案的可行性。在米氏散射理论的基础上,结合光学系统和电子学系统的设计完成了集成化激光雾霾检测系统的整体设计,包括五点协同激光模组的设计、环形光电探测器阵列的设计、数据采集系统电路的设计以及基于nRF51822上层低功耗蓝牙模块的数据传输的设计。利用nRF51822的优越的低功耗蓝牙特性,实现了单台仪器的无线传输设计。分析了现有的各种粒度分布反演算法,在现有典型算法的基础上提出一种全新的更适合于本文雾霾检测系统的独立模式反演算法“五点互相关交叠算法”,进一步提高计算的精度及稳定性。通过实验对系统进行了整体测试,在测试数据的基础上分析了系统的检测性能,并对检测误差进行了分析,提出了改进的方法。
[Abstract]:The increasing frequency of haze weather, social life, ecological environment, human health and other aspects caused great harm, and the content of various suspended particulates in the atmosphere is the primary cause of haze weather. Compared with other atmospheric particle detection methods, the light scattering method has the advantages of high measurement speed, high accuracy and on-line non-contact measurement. It has become the main method of atmospheric particle detection. The theoretical basis of light scattering method is introduced in detail, and the theory of Michlet scattering and the principle of measuring the concentration of particulate matter based on the theory of Mihertz scattering are analyzed in depth. The feasibility of developing a laser haze detection system based on Michelson scattering principle is demonstrated theoretically. On the basis of Michelson scattering theory, the whole design of integrated laser haze detection system is completed by combining the design of optical system and electronic system, including the design of five-point cooperative laser module and the design of ring photodetector array. The design of the circuit of data acquisition system and the design of data transmission based on nRF51822 upper layer low power Bluetooth module. The wireless transmission design of a single instrument is realized by using the superior low power Bluetooth characteristic of nRF51822. Based on the analysis of various existing algorithms of grain-size distribution inversion, a new independent pattern inversion algorithm, "five-point cross-correlation overlapping algorithm", which is more suitable for haze detection system in this paper, is proposed. Further improve the accuracy and stability of the calculation. The whole system is tested by experiments, and the performance of the system is analyzed on the basis of the test data, and the detection error is analyzed, and the improved method is put forward.
【学位授予单位】：中国科学院研究生院(长春光学精密机械与物理研究所)
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TP274;TN249
[Abstract]:The increasing frequency of haze weather, social life, ecological environment, human health and other aspects caused great harm, and the content of various suspended particulates in the atmosphere is the primary cause of haze weather. Compared with other atmospheric particle detection methods, the light scattering method has the advantages of high measurement speed, high accuracy and on-line non-contact measurement. It has become the main method of atmospheric particle detection. The theoretical basis of light scattering method is introduced in detail, and the theory of Michlet scattering and the principle of measuring the concentration of particulate matter based on the theory of Mihertz scattering are analyzed in depth. The feasibility of developing a laser haze detection system based on Michelson scattering principle is demonstrated theoretically. On the basis of Michelson scattering theory, the whole design of integrated laser haze detection system is completed by combining the design of optical system and electronic system, including the design of five-point cooperative laser module and the design of ring photodetector array. The design of the circuit of data acquisition system and the design of data transmission based on nRF51822 upper layer low power Bluetooth module. The wireless transmission design of a single instrument is realized by using the superior low power Bluetooth characteristic of nRF51822. Based on the analysis of various existing algorithms of grain-size distribution inversion, a new independent pattern inversion algorithm, "five-point cross-correlation overlapping algorithm", which is more suitable for haze detection system in this paper, is proposed. Further improve the accuracy and stability of the calculation. The whole system is tested by experiments, and the performance of the system is analyzed on the basis of the test data, and the detection error is analyzed, and the improved method is put forward.
【学位授予单位】：中国科学院研究生院(长春光学精密机械与物理研究所)
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TP274;TN249
【相似文献】
相关期刊论文 前10条
1 王蕾;高尚玉;刘连友;哈斯;;北京市11种园林植物滞留大气颗粒物能力研究[J];应用生态学报;2006年04期
2 罗莹华;戴塔根;梁凯;;大气颗粒物源解释研究综述[J];地质与资源;2006年02期
3 刘吉;范绍佳;张镭;陈长和;陈训来;孟智平;;兰州市冬季大气颗粒物的污染特征分析[J];兰州大学学报;2006年06期
4 钟宇红;房春生;邱立民;吕莉莎;张子宜;董德明;于连贵;刘辉;刘春阳;苏红石;赵静;;扫描电镜分析在大气颗粒物源解析中的应用[J];吉林大学学报(地球科学版);2008年03期
5 余涛;程新彬;杨忠芳;段鸿飞;张兵兵;杨晓波;;辽宁省典型地区大气颗粒物重金属元素分布特征及对土地质量影响研究[J];地学前缘;2008年05期
6 吴晓伟;高运川;郭亚琦;吴R，
本文编号：2293906
本文链接：https://www.wllwen.com/kejilunwen/dianzigongchenglunwen/2293906.html
