基于激光系统的测量与监控的实际应用综合探究

发布时间：2018-03-29 07:33

本文选题：半导体激光器　切入点：组合透镜　出处：《辽宁大学》2015年硕士论文

【摘要】：激光因其独有的特点在许多领域得到了广泛应用,特别在激光测量领域中具有举足轻重的地位。激光测量技术突出的优点是：自然基准光波直接与激光相联系,可以实现高精度的测量,很容易做到光电转换与单片机的互联应用,并能够将得到的测量数据进行分析和处理。本文激光系统的研究正是借助激光独有的测量特性,结合内置电子系统,对每个零件遮断光线时产生的明暗变化做出反应,可对静止零件或旋转零件进行实时测量与破损监控。本文从激光系统采用的三脚半导体激光器展开讨论,分析并阐述了三脚半导体激光器的内部结构及工作方式,然后对三脚半导体激光器的光斑模态做出综合探究,从纵模和横模的分析角度出发,分析得出TEMoo模为系统的理想工作模态。通过对R11所取不同阻值进行数据对比分析,最后得出,在R11为5K时,可使三脚半导体激光器始终工作在恒流状态,保证了发射端激光光束有稳定的波长(650nm)输出,从而证明了APC驱动电路的可靠性,可以达到激光系统要求,能够实现实时的功率闭环。然后主要探讨激光系统的核心部分,分析了高斯光束圆形镜共焦腔的行波场和高斯光束的基本性质,并提出激光系统对激光光束的要求。通过对激光光学系统透镜的综合探究,并从高斯光束经过薄透镜变换与复杂透镜变换的探究分析出发,完成本套激光系统的镜组选型。最后对形成的激光高斯光束进行聚焦和准直探究,完成了对光束聚焦和准直的计算讨论,经实验论证,得出理论值l=3.5mm时,符合实际应用的结论。最后对完成激光信号实时采集的光电二极管BPW24R进行简单介绍,阐述了光电二极管的工作方式。然后对围绕光电二极管BPW24R设计的采集电路做出展示,采集系统以主控芯片STM32F101T6V6A为控制核心,以电荷运算放大器OP213FP为激光信号采集核心。最后经实验论证,基于光电二极管BPW24R特性设计的采集电路,在当R16=1K,可编程电位器U5的输入值为140时,可以较好的满足激光系统采集实现,符合本激光系统的实际要求。
[Abstract]:Because of its unique characteristics, laser has been widely used in many fields, especially in the field of laser measurement. The outstanding advantage of laser measurement technology is that the natural reference light wave is directly related to the laser. High precision measurement can be realized, it is easy to interconnect photoelectric conversion with single chip microcomputer, and the measured data can be analyzed and processed. In this paper, the research of laser system is based on the unique measurement characteristics of laser. Combined with the built-in electronic system, the light and dark changes caused by the shading of each part can be responded to, and the real-time measurement and damage monitoring of the static part or the rotating part can be carried out. This paper discusses the tripod semiconductor laser used in the laser system. In this paper, the internal structure and working mode of tripod semiconductor laser are analyzed and expounded, and then the mode of light spot of tripod semiconductor laser is studied synthetically, which is based on the analysis of longitudinal mode and transverse mode. It is concluded that the TEMoo mode is the ideal working mode of the system. By comparing and analyzing the different resistance values of R11, it is concluded that the tripod semiconductor laser can always work in the constant current state when R11 is 5K. The laser beam at the transmitter has a stable wavelength of 650 nm) output, which proves the reliability of the APC drive circuit, which can meet the requirements of the laser system and realize the real-time power closed-loop. Then the core part of the laser system is discussed. This paper analyzes the traveling wave field of Gao Si beam circular mirror confocal cavity and the basic properties of Gao Si beam, and puts forward the requirements of laser system for laser beam. Based on the inquiry and analysis of Gao Si beam through thin lens transformation and complex lens transformation, the mirror selection of this set of laser system is completed. Finally, focusing and collimation of the formed laser Gao Si beam is carried out. The calculation and discussion of beam focusing and collimation have been completed. The theoretical value of l=3.5mm is in line with the practical application conclusion. Finally, the photodiode BPW24R, which completes the real-time acquisition of laser signals, is briefly introduced. The working mode of photodiode is expounded. Then the acquisition circuit designed around photodiode BPW24R is demonstrated. The main control chip STM32F101T6V6A is used as the control core in the acquisition system. The laser signal acquisition core is the charge operational amplifier (OP213FP). Finally, the acquisition circuit based on the BPW24R characteristics of the photodiode is designed. When the input value of the programmable potentiometer U5 is 140, the input value of the programmable potentiometer U5 is 140, when the input value of the programmable potentiometer U5 is 140K. It can meet the practical requirements of the laser system.
【学位授予单位】：辽宁大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN249

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