【作者】 雷轶鸣；

【导师】 邹建；

【作者基本信息】 重庆大学 ， 仪器科学与技术， 2007， 硕士

【摘要】 由于近几年光电产业的快速发展,使得半导体发光二极管(LED)有了广泛的应用,对LED的质量要求也不断的提高,人们对LED光、电、色参数的检测也提出了更高的要求。单凭工人们的工作经验或简单测量工具来判断LED质量的好坏、区分颜色已经不能满足市场的需求了。国内外不少研究机构和企业都研制出了不少具有较高水平的检测设备和仪器。本课题在分析已有的测试方法的基础上,提出了一套新的测试方案。该方案在提高仪器的测试精度、重复性、可靠性和测试效率的基础上,能有效的降低成本,满足不同用户和应用的需求。本文主要研究基于虚拟仪器的发光二极管LED(Light Emitted Diode)关键测试技术和方法,包括LED的电参数、LED的光谱参数及光功率的测试原理、方法、步骤及系统实现,重点介绍系统软件功能的实现。首先,介绍了LED参数测试原理及测试方案。特别详细的论述了有关LED光谱参数测试的原理,提高测试精度的方法和改进途径,包括发散角的测试方法、发光强度测试的原理、注意事项和提高测试准确度的方法。在针对LED主要的光谱参数和电参数进行理论分析的基础上,提出LED特性参数的测量方法、步骤及测量的关键。以定光栅摄谱仪和线阵CCD作为光谱探测器,以采集卡AC6010和USB2004为控制数据采集的核心,使用LabVIEW做系统的软件平台,完成了LED光谱测试仪硬件和软件的设计与开发。实现了信号采集、数据处理及软件编程。完成了对数据采集卡的驱动、CCD信号的采集及采集结果的初步处理;实现了数字滤波、光谱波长、半波宽度、光功率、电参数的计算。该套仪器系统可完成LED多种特性参数的同时测量,适用于LED的生产测试和研究试验。最后利用所开发的试验装置和仪器对样品进行了测试,给出了电参数和光谱参数等测试结果数据,并分析了可能影响测量结果的因素,提出了系统的改进意见和方法。更多还原

【Abstract】 With the development of application of optoelectronic device, LED (light emitted diode) is used widely. Requirement of LED’s quality was great improved; parameters of LED’s are tested strictly. The way that LED’s quality is decided by experience or simple tools can’t be satisfied with market requirement. Many enterprises and institutes have developed some kinds of high level testing devices. This paper puts forward a new test method based on the analyses of the other testing schemes. The new scheme can satisfy with different users and application’s requirement, and the same time which can improve the test precise, reliability and efficiency.This paper will focus on research and application key test technology and method about LED base on LabVIEW, including the principal, the method, the steps and the implement of test system of parameter testing, such as thermal performance parameters of spectrum and photometric parameters of LED, focus on realization of system software.Firstly, we introduced the LED parameter test principle and the test plan. Specially detailed elaboration LED spectrum parameter test principle, the method of increasing the test precision and the improvement way. Including divergence angle test method; Luminous intensity test principle, matters needing attention and enhancement test accuracy method.Proposed parameters measurements, the measurement steps and key based on theoretical analysis LED mainly spectral parameters and electrical parameters. Used spectrograph and linear-CCD to survey light signal, and used gathering card AC6010 and USB2004 to control, get signal data. Software is LabVIEW .Has completed the logarithm according to the gathering card driving, CCD signal gathering and gathering result preliminary processing. This instruments system may complete the LED spectrum and the luminosity parameter rapid survey, is suitable to the LED production test and the research test.Finally used the test equipment and the instrument done some test, giving produced test result data and so on the electrical parameter and spectrum parameter, analysis of measurement results might affect the factors and proposed the instrument improvement comment.更多还原