太阳能电池板表面形貌测量装置关键技术研究

发布时间：2018-04-30 23:20

本文选题：太阳能电池板 + 表面形貌　；参考：《郑州大学》2017年硕士论文

【摘要】：太阳能电池板表面纹理是影响光电转换效率的关键因素之一,通过对太阳能电池板表面微观形貌的测量,对比不同的表面纹理参数与太阳能电池板光电转换效率之间的关系,可以确定与光电转换效率相关性较高的参数,用于指导太阳能电池的生产,有助于提高太阳能电池板光电效率。本文介绍了所设计的一套基于垂直扫描白光干涉技术的表面形貌测量仪,适用于太阳能电池板表面纹理测量。该形貌测量仪结构原理是通过压电陶瓷驱动柔性铰链机构带动Mirau干涉显微镜垂直移动,改变Mirau干涉显微镜中参考光束和被测光束的光程差,实现对被测表面纹理的白光干涉扫描,CCD相机对每次垂直进给时的白光干涉条纹进行采集,图像采集卡将采集信息传送给PC机并进行处理。垂直位移通过双衍射光栅计量装置实现计量,动光栅与Mirau干涉镜同步运动,相对静光栅位移而引起激光干涉条纹光强变化,四象限光电阵列检测激光干涉条纹光强信号转换成电信号,经调理电路调理,输入STM32单片机进行辨向、细分与计数,实现对Mirau干涉显微镜的垂直位移精确计量并将计量结果送入PC机。上位PC机将采集图样进行叠加得零级白光干涉条纹在垂直方向上的干涉位置分布,采用一定的干涉条纹提取算法对白光干涉条纹的最佳干涉位置进行提取,并对提取数据进行处理得到被测表面各被测点零光程差时的相对高度,进而获取被测表面的微观形貌,进一步进行微观形貌参数评定。最后使用该测量仪对标准样板进行了多组实验,验证了测量仪垂直进给位移计量的精度。该仪器可应用于太阳能电池的实际生产,指导光伏生产商对生产工艺和方法进行改进,提高光电转换效率,对光伏产业的发展、资源节约和环境保护有着重要的意义。
[Abstract]:The surface texture of solar panels is one of the key factors affecting the photovoltaic conversion efficiency. By measuring the surface morphology of solar panels, the relationship between different surface texture parameters and photovoltaic conversion efficiency of solar panels is compared. The parameters which have a high correlation with the photoelectric conversion efficiency can be used to guide the production of solar cells and help to improve the photovoltaic efficiency of solar panels. This paper introduces a set of surface topography measuring instrument based on vertical scanning white light interferometry, which is suitable for surface texture measurement of solar panels. The structure principle of this instrument is that the flexure hinge mechanism is used to drive the vertical movement of the Mirau interference microscope, and the optical path difference between the reference beam and the measured beam in the Mirau interferometer is changed. The white light interference scanning CCD camera with measured surface texture is realized to collect the white light interference fringes at each vertical feed. The image acquisition card transmits the collected information to the PC and processes it. The vertical displacement is measured by double diffraction grating metering device. The moving grating and the Mirau interferometer move synchronously, which causes the laser interference fringe light intensity to change relative to the static grating displacement. The four quadrant photoelectric array detects the laser interference fringe light intensity signal to convert into the electric signal, after the conditioning circuit adjusts, inputs the STM32 single chip computer to distinguish the direction, subdivides and counts, The vertical displacement of Mirau interference microscope is accurately measured and the measurement results are sent to PC. The superposition of zero order white light interference fringes in vertical direction is carried out by PC, and the optimum interference position of white light interference fringes is extracted by certain interference fringes extraction algorithm. The relative height of the measured surface with zero optical path difference was obtained by processing the extracted data, and then the micro-topography of the measured surface was obtained, and the parameters of the micro-topography were evaluated. Finally, the instrument is used to carry out many experiments on the standard template, which verifies the accuracy of measuring the vertical feed displacement of the measuring instrument. The instrument can be applied to the actual production of solar cells, and guide photovoltaic manufacturers to improve the production process and methods, improve the efficiency of photovoltaic conversion, and have an important significance for the development of photovoltaic industry, resource conservation and environmental protection.
【学位授予单位】：郑州大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM914.4

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