本文選題：探空溫度傳感器 + 太陽輻射升溫量��； 參考：《南京信息工程大學》2017年碩士論文

【摘要】：研究對流層和平流層下部大氣溫度,對提高氣象預報的準確度和氣候變化規(guī)律有著重要意義。高空大氣溫度探測過程中,太陽輻射引起的探空溫度傳感器溫升是影響溫度測量精度的重要因素。目前國內(nèi)外針對太陽輻射升溫量的研究方法主要包括風洞實驗法和經(jīng)驗公式估測法,受實驗技術(shù)難度及公式適用性的限制,難以對探空溫度傳感器在高空氣流環(huán)境中的輻射升溫量進行精確的定量求解。為解決上述問題,本文提出采用計算流體力學方法對探空溫度傳感器進行數(shù)值仿真,求解輻射升溫量。本文首先研究了珠狀熱敏電阻在不同引線長度、夾角和數(shù)量條件下輻射升溫量的變化規(guī)律。仿真結(jié)果表明,隨著引線長度的增大,珠狀熱敏電阻輻射升溫量逐漸減小;180 °引線夾角的四引線傳感器結(jié)構(gòu)輻射升溫量受太陽照射角度影響較小。通過遺傳算法對仿真結(jié)果進行擬合,獲得該四引線傳感器結(jié)構(gòu)在不同太陽高度角和方位角條件下的輻射升溫量計算方程。由于探空溫度傳感器的支架也對輻射升溫量產(chǎn)生影響,對帶支架結(jié)構(gòu)的珠狀熱敏電阻進行仿真研究。仿真結(jié)果表明,輻射升溫量隨引線熱導率、海拔高度、太陽輻射強度的增大而增大,隨太陽高度角的增大而減小;帶支架條件下引線30mm的結(jié)構(gòu)輻射升溫量較小;小尺寸支架和無橫梁結(jié)構(gòu)都有利于降低輻射升溫量。為提高研究結(jié)果的普適性,通過BP神經(jīng)網(wǎng)絡算法獲得輻射升溫量關(guān)于海拔高度、太陽輻射強度、太陽高度角的計算公式。公式驗證結(jié)果表明,計算值與仿真值一致性較高,最大誤差低于0.1 K,計算公式可靠性較高。為了提高本文研究成果的實用性,基于Qt設計了探空溫度傳感器輻射升溫量查詢修正軟件。該軟件可對輻射升溫量進行實時顯示和修正,也可對歷史數(shù)據(jù)和輻射升溫量仿真結(jié)果進行查詢。
[Abstract]:It is important to study the atmospheric temperature in the troposphere and the lower stratosphere to improve the accuracy of meteorological forecast and the regularity of climate change.The temperature rise of sounding temperature sensor caused by solar radiation is an important factor to affect the precision of temperature measurement in the process of upper atmosphere temperature detection.At present, the research methods of solar radiation heating amount at home and abroad mainly include wind tunnel experimental method and empirical formula estimation method, which are limited by the difficulty of experimental technology and the applicability of the formula.It is difficult to calculate accurately the radiative temperature of the sounding temperature sensor in the upper air flow environment.In order to solve the above problems, a computational fluid dynamics method is proposed to numerically simulate the radiometric temperature sensor and to calculate the radiation temperature.In this paper, the variation of radiation heating rate of bead thermistor under different lead length, angle and quantity is studied.The simulation results show that with the increase of lead length, the radiation temperature rise of bead thermistor decreases gradually, and the radiation temperature rise of four-lead sensor structure with 180 擄lead angle is less affected by solar radiation angle.The simulation results are fitted by genetic algorithm, and the equation of radiative heating under different solar height and azimuth is obtained.Because the support of the radiosonde temperature sensor also affects the radiation heating, the bead thermistor with the support structure is simulated.The simulation results show that the radiation heating increases with the increase of lead thermal conductivity, altitude and solar radiation intensity, and decreases with the increase of solar height angle, while the structure radiative heating of lead 30mm is small under the condition of scaffold.Both the small support and the non-beam structure are beneficial to reduce the radiation heating.In order to improve the universality of the research results, the formulas for calculating the radiative warming amount related to altitude, solar radiation intensity and solar height angle are obtained by BP neural network algorithm.The results of formula verification show that the calculated value is in good agreement with the simulation value, the maximum error is less than 0.1 K, and the reliability of the formula is high.In order to improve the practicability of the research results, a software of radiosonde temperature sensor is designed based on QT.The software can display and modify the radiative warming in real time, and can also query the historical data and the simulation results of the radiative heating.
【學位授予單位】：南京信息工程大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TP212.11

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本文編號：1772929