摘要
基于光学中的朗伯定律,推导了紫外成像仪在电晕检测中示数与检测距离之间的函数关系,即示数与检测距离之间的函数关系满足阿拉德定律的表达式。对方程左右两边取自然对数,将超越方程的参数估计问题转化成线性方程的参数估计问题,降低了参数估计的计算量;在估计参数时,应用RANSAC鲁棒估计算法估计参数,消除了严重偏离真实值的外点对估计结果的影响,提高了参数估计的精度。通过实验验证了紫外成像仪示数与检测距离之间的函数关系。
Based on the Lambert＇s law,the relationaship between readings and observed distances was formulated in executing corona detection with ultraviolet imager.The formula shows that the relationship between the two meets the Allard＇s law expression.Through logarithmic operation for both sides of the equation,parameters estimation of a transcendental equation is transformed into parameters estimation of a linear one,and the computational complexity is reduced.RANSAC algorithm is employed in order to improve the accuracy of estimated parameters and elliminate the impact of outlier.Besides,the formula is verified by the experiment.
出处
《华北电力大学学报（自然科学版）》
CAS
北大核心
2010年第4期78-83,共6页
Journal of North China Electric Power University：Natural Science Edition
