一种基线长度改变的能见度测量和评价方法
发布时间：2018-08-18 12:20
【摘要】：针对能见度真值难以确定和能见度仪测量结果难以评价的问题,提出了一种基线长度改变的能见度测量和评价的方法,并采用整体最小二乘拟合方法来降低基线长度的定位误差和透射率测量误差对消光系数的影响,提高了消光系数的测量精度。为验证方法的有效性和评价该方法在不同能见度条件下的测量性能,设计了移动测试平台,在大气模拟舱模拟了一次能见度由高到低持续变化的过程,采用多点多次测量的方式测量了环境的消光系数及能见度。实验结果表明该方法在不同能见度条件下,均有较高的测量稳定性和一致性。确定系数随能见度的降低而增大,能见度大于3000 m时,确定系数也达到0.9以上,低能见度时可以达到0.99。各种能见度条件下,单位权方差在10-4~10-2之间,表明该方法测量的离散性很小,测量精度高,可作为能见度仪校正和标定的参考。
[Abstract]:In view of the difficulty of determining the true value of visibility and the difficulty of evaluating the measured results of visibility meter, a method of measuring and evaluating visibility with varying baseline length is proposed. The global least square fitting method is used to reduce the influence of baseline length positioning error and transmissivity measurement error on extinction coefficient, and the measurement accuracy of extinction coefficient is improved. In order to verify the effectiveness of the method and evaluate the measurement performance of the method under different visibility conditions, a mobile test platform was designed to simulate a continuous change of visibility from high to low in an atmospheric simulation chamber. The extinction coefficient and visibility of the environment were measured by multi-point multiple measurements. The experimental results show that the method has high measurement stability and consistency under different visibility conditions. The deterministic coefficient increases with the decrease of visibility. When the visibility is more than 3000 m, the determinate coefficient is more than 0. 9, and when the visibility is low, it can reach 0. 99. Under various visibility conditions, the unit weight variance is between 10 ~ (-4) ~ (10 ~ (-2), which indicates that this method is of low discreteness and high accuracy, and can be used as a reference for calibration and calibration of visibility meter.
【作者单位】： 中国民航大学飞行技术学院;中国民航大学民航气象研究所;中国民航大学空中交通管理学院;
【基金】：国家自然科学基金民航联合重点项目(U1433202) 民航安全能力建设资金(TMSA1458)
【分类号】：V321.223
本文编号：2189451
[Abstract]:In view of the difficulty of determining the true value of visibility and the difficulty of evaluating the measured results of visibility meter, a method of measuring and evaluating visibility with varying baseline length is proposed. The global least square fitting method is used to reduce the influence of baseline length positioning error and transmissivity measurement error on extinction coefficient, and the measurement accuracy of extinction coefficient is improved. In order to verify the effectiveness of the method and evaluate the measurement performance of the method under different visibility conditions, a mobile test platform was designed to simulate a continuous change of visibility from high to low in an atmospheric simulation chamber. The extinction coefficient and visibility of the environment were measured by multi-point multiple measurements. The experimental results show that the method has high measurement stability and consistency under different visibility conditions. The deterministic coefficient increases with the decrease of visibility. When the visibility is more than 3000 m, the determinate coefficient is more than 0. 9, and when the visibility is low, it can reach 0. 99. Under various visibility conditions, the unit weight variance is between 10 ~ (-4) ~ (10 ~ (-2), which indicates that this method is of low discreteness and high accuracy, and can be used as a reference for calibration and calibration of visibility meter.
【作者单位】： 中国民航大学飞行技术学院;中国民航大学民航气象研究所;中国民航大学空中交通管理学院;
【基金】：国家自然科学基金民航联合重点项目(U1433202) 民航安全能力建设资金(TMSA1458)
【分类号】：V321.223
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