發(fā)布時(shí)間：2018-08-18 12:20

【摘要】：針對(duì)能見度真值難以確定和能見度儀測(cè)量結(jié)果難以評(píng)價(jià)的問(wèn)題,提出了一種基線長(zhǎng)度改變的能見度測(cè)量和評(píng)價(jià)的方法,并采用整體最小二乘擬合方法來(lái)降低基線長(zhǎng)度的定位誤差和透射率測(cè)量誤差對(duì)消光系數(shù)的影響,提高了消光系數(shù)的測(cè)量精度。為驗(yàn)證方法的有效性和評(píng)價(jià)該方法在不同能見度條件下的測(cè)量性能,設(shè)計(jì)了移動(dòng)測(cè)試平臺(tái),在大氣模擬艙模擬了一次能見度由高到低持續(xù)變化的過(guò)程,采用多點(diǎn)多次測(cè)量的方式測(cè)量了環(huán)境的消光系數(shù)及能見度。實(shí)驗(yàn)結(jié)果表明該方法在不同能見度條件下,均有較高的測(cè)量穩(wěn)定性和一致性。確定系數(shù)隨能見度的降低而增大,能見度大于3000 m時(shí),確定系數(shù)也達(dá)到0.9以上,低能見度時(shí)可以達(dá)到0.99。各種能見度條件下,單位權(quán)方差在10-4~10-2之間,表明該方法測(cè)量的離散性很小,測(cè)量精度高,可作為能見度儀校正和標(biāo)定的參考。
[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.
【作者單位】： 中國(guó)民航大學(xué)飛行技術(shù)學(xué)院;中國(guó)民航大學(xué)民航氣象研究所;中國(guó)民航大學(xué)空中交通管理學(xué)院;
【基金】：國(guó)家自然科學(xué)基金民航聯(lián)合重點(diǎn)項(xiàng)目(U1433202) 民航安全能力建設(shè)資金(TMSA1458)
【分類號(hào)】：V321.223

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