采用数字调谐激光器的光纤光学相干测距仪的研究
发布时间：2019-07-08 19:00
【摘要】：非接触、高精度、无导轨的绝对距离测量技术在计量科学领域与工业应用领域有着重要的理论价值和实用意义，因此基于激光频率扫描干涉的绝对距离测量技术受到广泛研究。由于现有的基于该原理的测距系统大多采用连续来回扫描的调谐激光器作为光源，应用透镜系统搭建干涉光路，并且实现高精度测量时需要附加波长定位器，因此这种测量系统存在着体积大、光路对准要求高、被测目标需要安装反射镜等缺点。 本论文针对这些问题，在分析了基于频率扫描干涉绝对距离测量技术的原理和数据处理方法的基础上，设计了采用数字调谐激光器的光纤光学相干测距仪。论文研究的测距仪由数字调谐激光器、光纤干涉光路、信号采集电路以及PC机组成。采用数字调谐激光器作为扫描光源，所输出激光的频率可以设定且定位十分精准，因此无需另设波长定位器就可以实现高精度测量。选用单模光纤及相关光纤器件搭建干涉光路，并设计了带有参考反射面的集成光纤相干传感器作为测量探头，根据光纤纤芯的空间滤波特性和光的漫反射特性实现了对非光学表面的直接测量，并降低了测量光路的对准要求。信号采集电路包括ARM控制板和八路采集板，，其中八路采集板实现8通道干涉信号的光电转换和AD采集；ARM控制板以STM32为主控芯片，实现对数字调谐激光器的控制，并将AD采集的干涉信号数据通过以太网转发给PC机。PC机上通过LabVIEW编程实现干涉信号的分析与距离值的计算。 对所制作的光纤光学相干测距仪样机进行了测试。实验表明该测距仪的量程达到30mm，测量的重复偏差值小于0.002%，可以对金属、塑料等非光学表面进行直接测量，且允许测量光路存在一定的角度偏差。同时测距仪拥有体积小、集成度高、可多通道远距离测量等优点，在工业自动生产中有着很好的应用前景。
文内图片：
图片说明：图1.1双波长干涉测距原理图
[Abstract]:The absolute distance measurement of non-contact, high-precision and non-guide rail has important theoretical and practical significance in the field of measurement science and the field of industrial application, so the absolute distance measurement technology based on laser frequency scanning interference is widely studied. Because the existing ranging system based on the principle is used as a light source for most of the ranging systems which are continuously and back-and-forth, an interference light path is built by using a lens system, and an additional wavelength positioner is required to realize high-precision measurement, so that the measurement system has a large volume, The light path alignment requirement is high, and the target to be tested needs to be provided with a reflector and the like. In this paper, based on the analysis of the principle of the absolute distance measurement based on the frequency sweep and the data processing method, the optical coherence distance measurement of the optical fiber with the digital tuning laser is designed based on the analysis of the principle of the absolute distance measurement based on the frequency scanning and the data processing method. The range finder is composed of a digital tuning laser, an optical fiber interference light path, a signal acquisition circuit and a PC unit. by adopting a digital tuning laser as a scanning light source, the frequency of the output laser can be set and the positioning is very precise, In this paper, a single-mode optical fiber and a related optical fiber device are used to set up the interference light path, and an integrated optical fiber coherence sensor with a reference reflection surface is designed as the measuring probe, and the direct measurement of the non-optical surface is realized according to the spatial filtering characteristic of the optical fiber core and the diffuse reflection characteristic of the light. the amount and the alignment of the measurement light path are reduced to The signal acquisition circuit comprises an ARM control board and an eight-way acquisition board, wherein the eight-way acquisition board is used for realizing the photoelectric conversion and the AD acquisition of the 8-channel interference signal; and the ARM control board takes the STM32 as the main control chip to realize the control of the digital tuning laser And the interference signal data acquired by the AD is forwarded to the PC through the Ethernet. Machine. The analysis of the interference signal and the meter of the distance value are realized by the LabVIEW programming on the PC. calculating the produced optical fiber optical coherence range finder The test shows that the range of the range finder is 30 mm and the measured repeat deviation is less than 0.002%. The non-optical surface such as metal, plastic and other non-optical surfaces can be measured directly, and a certain angle is allowed to be measured in the optical path. The range finder has the advantages of small volume, high integration level, multi-channel long-distance measurement and the like,
【学位授予单位】：浙江理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN247
本文编号：2511802
文内图片：
图片说明：图1.1双波长干涉测距原理图
[Abstract]:The absolute distance measurement of non-contact, high-precision and non-guide rail has important theoretical and practical significance in the field of measurement science and the field of industrial application, so the absolute distance measurement technology based on laser frequency scanning interference is widely studied. Because the existing ranging system based on the principle is used as a light source for most of the ranging systems which are continuously and back-and-forth, an interference light path is built by using a lens system, and an additional wavelength positioner is required to realize high-precision measurement, so that the measurement system has a large volume, The light path alignment requirement is high, and the target to be tested needs to be provided with a reflector and the like. In this paper, based on the analysis of the principle of the absolute distance measurement based on the frequency sweep and the data processing method, the optical coherence distance measurement of the optical fiber with the digital tuning laser is designed based on the analysis of the principle of the absolute distance measurement based on the frequency scanning and the data processing method. The range finder is composed of a digital tuning laser, an optical fiber interference light path, a signal acquisition circuit and a PC unit. by adopting a digital tuning laser as a scanning light source, the frequency of the output laser can be set and the positioning is very precise, In this paper, a single-mode optical fiber and a related optical fiber device are used to set up the interference light path, and an integrated optical fiber coherence sensor with a reference reflection surface is designed as the measuring probe, and the direct measurement of the non-optical surface is realized according to the spatial filtering characteristic of the optical fiber core and the diffuse reflection characteristic of the light. the amount and the alignment of the measurement light path are reduced to The signal acquisition circuit comprises an ARM control board and an eight-way acquisition board, wherein the eight-way acquisition board is used for realizing the photoelectric conversion and the AD acquisition of the 8-channel interference signal; and the ARM control board takes the STM32 as the main control chip to realize the control of the digital tuning laser And the interference signal data acquired by the AD is forwarded to the PC through the Ethernet. Machine. The analysis of the interference signal and the meter of the distance value are realized by the LabVIEW programming on the PC. calculating the produced optical fiber optical coherence range finder The test shows that the range of the range finder is 30 mm and the measured repeat deviation is less than 0.002%. The non-optical surface such as metal, plastic and other non-optical surfaces can be measured directly, and a certain angle is allowed to be measured in the optical path. The range finder has the advantages of small volume, high integration level, multi-channel long-distance measurement and the like,
【学位授予单位】：浙江理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN247
【参考文献】
中国期刊全文数据库 前10条
1 张存满,赵洋,李达成;采用法布里-珀罗腔的绝对距离干涉系统的方案分析[J];光电工程;2000年06期
2 张森;刘孟华;王臻;周琦;;光纤传感器的研究及应用[J];光通信研究;2007年03期
3 梁晶;龙兴武;张斌;金世龙;;用117μm合成波长实现绝对距离干涉测量[J];光学学报;2010年10期
4 李志栋;江月松;桑峰;王林春;邓士光;辛遥;郭泾平;;频率扫描干涉法绝对测距中运动误差的补偿研究[J];光学学报;2011年03期
5 金龙,张伟刚,涂勤昌,董孝义;干涉技术在光纤传感器设计中的应用[J];激光与光电子学进展;2004年07期
6 所睿,范志军,李岩,张书练;双频激光干涉仪技术现状与发展[J];激光与红外;2004年04期
7 王勇,廖延彪,田芊;波长扫描干涉仪信号处理技术[J];中国激光;1999年03期
8 晁志霞,殷纯永,徐毅,许婕;可调合成波长链绝对距离干涉测量[J];计量学报;2002年03期
9 张舞杰;南亦民;;基于STM32F103VB的应用编程技术的实现[J];计算机应用;2009年10期
10 岳世为;尹为民;;uIP协议栈在基于DSP以太网通信系统中的应用[J];计算机与数字工程;2010年01期
中国博士学位论文全文数据库 前3条
1 马龙;白光扫描干涉测量方法与系统的研究[D];天津大学;2011年
2 梁晶;用于绝对距离测量的He-Ne激光多波长干涉仪的研究[D];国防科学技术大学;2010年
3 许艳;基于飞秒光频梳的绝对距离测量技术研究[D];华中科技大学;2012年
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