新型工业化
新型工業化
신형공업화
New Industrialization Straregy
2011年
5期
85-89
,共5页
激光雷达%噪声%最小可探测功率%尾流轮廓
激光雷達%譟聲%最小可探測功率%尾流輪廓
격광뢰체%조성%최소가탐측공솔%미류륜곽
simple lidar%noise%minimum detectable signal power%wake profile
首先介绍了基于气泡180°后向散射探测尾流轮廓的简易激光雷达，并给出了获得尾流轮廓的数据处理方法。该方法采用功率谱密度估计来处理气泡激光散射信号，利用三次样条函数进行插值，进而绘出尾流轮廓的等值线图。然后，重点分析了该简易激光雷达的噪声，主要有外部背景光、50Hz 工频及其谐波、射频噪声以及电子系统内部的固有噪声，讨论了最小可探测功率与回波信号光功率的关系。结果表明尾流轮廓的数据处理方法满足噪声水平的要求，所给出的等值线图是合理的。
首先介紹瞭基于氣泡180°後嚮散射探測尾流輪廓的簡易激光雷達，併給齣瞭穫得尾流輪廓的數據處理方法。該方法採用功率譜密度估計來處理氣泡激光散射信號，利用三次樣條函數進行插值，進而繪齣尾流輪廓的等值線圖。然後，重點分析瞭該簡易激光雷達的譟聲，主要有外部揹景光、50Hz 工頻及其諧波、射頻譟聲以及電子繫統內部的固有譟聲，討論瞭最小可探測功率與迴波信號光功率的關繫。結果錶明尾流輪廓的數據處理方法滿足譟聲水平的要求，所給齣的等值線圖是閤理的。
수선개소료기우기포180°후향산사탐측미류륜곽적간역격광뢰체，병급출료획득미류륜곽적수거처리방법。해방법채용공솔보밀도고계래처리기포격광산사신호，이용삼차양조함수진행삽치，진이회출미류륜곽적등치선도。연후，중점분석료해간역격광뢰체적조성，주요유외부배경광、50Hz 공빈급기해파、사빈조성이급전자계통내부적고유조성，토론료최소가탐측공솔여회파신호광공솔적관계。결과표명미류륜곽적수거처리방법만족조성수평적요구，소급출적등치선도시합리적。
Simple lidar detecting wake profile based on laser backscattering by wake bubbles at 180° is firstly introduced, and the data processing method of wake profile is given. For this method, the power spectral density estimation is used to process the bubble laser scattering signal, and cubic spline interpolation is used to obtain contour map of wake profile. Then the various noises of this simple lidar, including the background light, power frequency of 50Hz and its harmonics, radio frequency noise and inherent noise within the electronic system, are analyzed in detailed, and the relationship of minimum detectable signal power and the echo signal power are discussed. The results show that the data processing method of wake profile meets the demand of the noise level and the obtained contour map is reasonable.
