基于傅里叶级数拟合的光强近场检测方法  

Near-Field Detection Method for Light Intensity Based on Fourier Series Fitting

作　　者：侯启真 王浩 段惠英 Hou Qizhen;Wang Hao;Duan Huiying(College of Electronic Information and Automation,Civil Aviation University of China,Tianjin 300300,China)

机构地区：[1]中国民航大学电子信息与自动化学院,天津300300

出　　处：《激光与光电子学进展》2023年第17期196-204,共9页Laser & Optoelectronics Progress

基　　金：国家重点研发计划项目(2021YFF0603902)。

摘　　要：因机场目视助航灯具出射光强高、出光口尺寸较大,常采用多个发光二极管(LED)排列成阵列的光源形式,这类助航灯光学故障在线检测难度高,目前尚无较便捷的有效检测方法。本文提出一种基于傅里叶级数拟合的照度逼近算法,在适宜的检测距离内获取灯光照度分布,并采用迭代计算的方式获得逼近真实值的单体LED光源光强分布;针对传统傅里叶级数拟合峰值区域误差较高的问题,引入单点方差阈值指标,较好地抑制了拟合峰值区域误差,使单体LED光源匹配度提升了1%;对5种典型阵列的不同故障进行了仿真验证,结果显示,该方法具有较高的通用性,常见故障中匹配度均在94%以上。Multiple light-emitting diode(LED)arrays are often used as light sources because of the high lamp-emitting port intensity and large light outlet size of navigation lights in airports.Online fault detection of such navigational lights is challenging,and no convenient and effective detection method has been developed.In this study,an illumination approximation algorithm based on Fourier series fitting is proposed.The illumination distribution of a single LED light source is obtained within a suitable detection distance,and the intensity distribution approximating to real value of the single LED light source is obtained via iterative calculations.Aiming at the problem of high peak-region error of traditional Fourier series fitting,a single-point variance threshold index is introduced to suppress the peak-region error of fitting and improve the matched degree of the single LED light source by 1%.The simulation results of the five typical array faults show that the proposed method exhibits high versatility,and the matched degree of common faults exceeds 94%.

关 键 词：光学检测 阵列型照明器 傅里叶级数拟合 助航灯 

分 类 号：TB96[机械工程—光学工程]