基于激光散斑法评估金属表面状态.doc
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基于激光散斑法评估金属表面状态,16500字 34页摘 要散斑干涉法是 70 年代发展起来的一种方法，它具有非接触和无损的优点，可用于实物测量。由于测量灵敏度高、设备简单, 根据所采用的分析技术可以给出逐点和全场信息, 因而近年来得到了广泛应用，然而激光散斑技术在表面分析领域中尚未有全面深入的研究，为了追求更简单的评估金...
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基于激光散斑法评估金属表面状态
16500字 34页
摘 要
散斑干涉法是 70 年代发展起来的一种方法，它具有非接触和无损的优点，可用于实物测量。由于测量灵敏度高、设备简单, 根据所采用的分析技术可以给出逐点和全场信息, 因而近年来得到了广泛应用，然而激光散斑技术在表面分析领域中尚未有全面深入的研究，为了追求更简单的评估金属表面状态的方法，将研究目光投向了激光散斑技术，提出了基于激光散斑法评估金属表面状态的研究。
通过对激光散斑技术应用的一些比较成熟的领域和现今的一些表面分析技术详细的了解，基于前人的研究启发提出了评估表面状态的标尺猜想，给出了新标尺的详细内容和设计到的参数，并设计了对比实验，对猜想进行了实验论证。由于反射光的强度取决于表面的几何微观结构和颜色，所以表面的任何变化将导致不同的散斑图像。在此基础上，分析激光散斑图像的参数，结合表面粗糙度，综合评定金属表面状态。研究以激光清洗的涂漆金属表面为实验样品，基于激光散斑法评估样品的激光清洗部分的表面状态为核心展开。样品的制作、实验设备的搭建、实验结果的分析，合理的规划实验线路，使得实验部分有条不紊。本次研究设计到了一款图像分析软件，为了得到所需的散斑图像参数，选择matlab软件分析处理实验获得的散斑图像。
本次研究为探究性研究，样品的制作、实验设备的局限、散斑图像的获取、参数的分析都直接关系到实验的结果。研究发现不同的金属表面获得的激光散斑图像明显不同，
通过散斑图像的分析结果也能发现相应的差异。相同粗糙度表面获得的散斑图像及其散斑参数的分析也不尽相同，但只在一个小范围内波动，不排除实验误差的影响，虽不能盲目的说明实验证实了自己的理论，但总的实验可以说明，当分析获得的散斑图像之间产生了较为明显的波动时，我们可以断定与之相应的表面状态有差异，当其散斑结果只是波动在小范围内，我们可以视作其对应的金属表面状态接近或者相等。基于激光散斑法评估金属表面状态的研究为激光加工的在线检测等技术提供有力支持。
关键词：激光散斑 金属 表面状态 散斑分析
State eva luation of the metal surface based on the laser speckle method
Abstract
Speckle interferometry is a method developed in the 70 s, it has the advantages of non-contact and non-destructive, can be used in the actual measurement. Because of high sensitivity, simple equipment, according to the analysis technology can be adopted by the given point and the information, which has wide application, however, in the field of laser speckle techniques on surface analysis has not yet have comprehensive in-depth research, in order to pursue more simple method of eva luating metal surface state, will study looking at the laser speckle technique, is presented based on the laser speckle method eva luating the state of the metal surface.
By means of laser speckle technique used some of the more mature areas and present some detailed understanding surface analysis technology, the eva luation of surface state was developed based on the predecessors' research inspired the scale of conjecture, gives a new scale to the detailed content and design parameters, and designed a contrast experiment, has carried on the experiment to guess. Due to the intensity of the reflected light depends on the geometry of the surface microscopic structure and color, so any changes will lead to different on the surface of the speckle image. On this basis, the analysis of the parameters of laser speckle images, combining with the surface roughness, the comprehensive eva luation of metal surface state. Research to painted metal surface laser cleaning as experimental samples, based on laser speckle method to eva luate the sample state of laser cleaning the surface of the part as the core. Samples of the production, the construction of the experimental equipment, the results of analysis, reasonable planning experiment circuit, makes the experimental section in an orderly way. The study design to a image analysis software, in order to get the required speckle image parameters, select matlab software analysis experiment of speckle image processing.
The study for exploratory research, sample production, the limitations of experimental equipment, speckle image acquisition, the analysis of the parameters are directly related to the results of the experiment. The study found that the different metal surface laser speckle images are obviously different, through the analysis of speckle image results can also be found the corresponding difference. The same surface roughness obtained by speckle image and the speckle parameter analysis also is not the same, but only in a small scale fluctuation, don't rule out the influence of experimental error, not to blindly explanation of the experiment confirmed his theory, but the total can experiment shows that when analyzing the speckle image between the more obvious fluctuations, we can conclude that with the corresponding surface state of difference, only when the speckle fluctuations on a small scale, we can be seen as the state of the corresponding metal surface close to or equal. Metal surface is assessed based on laser speckle method of research for the on-line measurement of laser processing technology to provide strong support.
Keywords: laser speckle metal Surface sta..
16500字 34页
摘 要
散斑干涉法是 70 年代发展起来的一种方法，它具有非接触和无损的优点，可用于实物测量。由于测量灵敏度高、设备简单, 根据所采用的分析技术可以给出逐点和全场信息, 因而近年来得到了广泛应用，然而激光散斑技术在表面分析领域中尚未有全面深入的研究，为了追求更简单的评估金属表面状态的方法，将研究目光投向了激光散斑技术，提出了基于激光散斑法评估金属表面状态的研究。
通过对激光散斑技术应用的一些比较成熟的领域和现今的一些表面分析技术详细的了解，基于前人的研究启发提出了评估表面状态的标尺猜想，给出了新标尺的详细内容和设计到的参数，并设计了对比实验，对猜想进行了实验论证。由于反射光的强度取决于表面的几何微观结构和颜色，所以表面的任何变化将导致不同的散斑图像。在此基础上，分析激光散斑图像的参数，结合表面粗糙度，综合评定金属表面状态。研究以激光清洗的涂漆金属表面为实验样品，基于激光散斑法评估样品的激光清洗部分的表面状态为核心展开。样品的制作、实验设备的搭建、实验结果的分析，合理的规划实验线路，使得实验部分有条不紊。本次研究设计到了一款图像分析软件，为了得到所需的散斑图像参数，选择matlab软件分析处理实验获得的散斑图像。
本次研究为探究性研究，样品的制作、实验设备的局限、散斑图像的获取、参数的分析都直接关系到实验的结果。研究发现不同的金属表面获得的激光散斑图像明显不同，
通过散斑图像的分析结果也能发现相应的差异。相同粗糙度表面获得的散斑图像及其散斑参数的分析也不尽相同，但只在一个小范围内波动，不排除实验误差的影响，虽不能盲目的说明实验证实了自己的理论，但总的实验可以说明，当分析获得的散斑图像之间产生了较为明显的波动时，我们可以断定与之相应的表面状态有差异，当其散斑结果只是波动在小范围内，我们可以视作其对应的金属表面状态接近或者相等。基于激光散斑法评估金属表面状态的研究为激光加工的在线检测等技术提供有力支持。
关键词：激光散斑 金属 表面状态 散斑分析
State eva luation of the metal surface based on the laser speckle method
Abstract
Speckle interferometry is a method developed in the 70 s, it has the advantages of non-contact and non-destructive, can be used in the actual measurement. Because of high sensitivity, simple equipment, according to the analysis technology can be adopted by the given point and the information, which has wide application, however, in the field of laser speckle techniques on surface analysis has not yet have comprehensive in-depth research, in order to pursue more simple method of eva luating metal surface state, will study looking at the laser speckle technique, is presented based on the laser speckle method eva luating the state of the metal surface.
By means of laser speckle technique used some of the more mature areas and present some detailed understanding surface analysis technology, the eva luation of surface state was developed based on the predecessors' research inspired the scale of conjecture, gives a new scale to the detailed content and design parameters, and designed a contrast experiment, has carried on the experiment to guess. Due to the intensity of the reflected light depends on the geometry of the surface microscopic structure and color, so any changes will lead to different on the surface of the speckle image. On this basis, the analysis of the parameters of laser speckle images, combining with the surface roughness, the comprehensive eva luation of metal surface state. Research to painted metal surface laser cleaning as experimental samples, based on laser speckle method to eva luate the sample state of laser cleaning the surface of the part as the core. Samples of the production, the construction of the experimental equipment, the results of analysis, reasonable planning experiment circuit, makes the experimental section in an orderly way. The study design to a image analysis software, in order to get the required speckle image parameters, select matlab software analysis experiment of speckle image processing.
The study for exploratory research, sample production, the limitations of experimental equipment, speckle image acquisition, the analysis of the parameters are directly related to the results of the experiment. The study found that the different metal surface laser speckle images are obviously different, through the analysis of speckle image results can also be found the corresponding difference. The same surface roughness obtained by speckle image and the speckle parameter analysis also is not the same, but only in a small scale fluctuation, don't rule out the influence of experimental error, not to blindly explanation of the experiment confirmed his theory, but the total can experiment shows that when analyzing the speckle image between the more obvious fluctuations, we can conclude that with the corresponding surface state of difference, only when the speckle fluctuations on a small scale, we can be seen as the state of the corresponding metal surface close to or equal. Metal surface is assessed based on laser speckle method of research for the on-line measurement of laser processing technology to provide strong support.
Keywords: laser speckle metal Surface sta..
