本文選題：變形監(jiān)測 + 合成孔徑雷達�。� 參考：《重慶大學》2014年碩士論文

【摘要】：近年來，各種大型建筑如跨江橋梁、水庫大壩、摩天大樓等層出不窮，給我們的生產(chǎn)生活帶來很多便利。但它們在使用過程中尤其是在災害環(huán)境下會發(fā)生變形，當變形量超出所能承受的范圍時，，會引發(fā)災難性后果。對這些建筑物進行變形監(jiān)測是危險預警的主要手段，是分析建筑物形變機理的重要方法。 為此，本論文研究了一種地基合成寬帶合成孔徑變形監(jiān)測雷達系統(tǒng)與方法，通過使用合成孔徑技術(shù)提高了方位向分辨率，通過使用合成寬帶技術(shù)提高了距離向分辨率，通過使用干涉測量技術(shù)得到了位移量。雷達輻射多子帶信號照射觀測區(qū)域，并接收回波信號。接收信號的處理過程為：以合成孔徑雷達成像距離多普勒算法為基礎，對各子帶信號進行匹配濾波，通過相干合成，完成超寬帶雷達信號距離向壓縮，然后進行距離校正、方位向匹配濾波、壓縮成像。論文以子帶為線性調(diào)頻信號，帶間為步進頻率信號為例，分析了合成寬帶信號處理的基本工作原理。論文還討論了地基環(huán)境及軌道長度受限條件下，雷達信號處理的各個過程以及非全孔徑成像的各項參數(shù)之間的關系。理論分析和仿真結(jié)果表明，本文方法可以在距離監(jiān)測對象50m處，實現(xiàn)0.1m的距離向分辨率和0.4m的方位向分辨率，以及毫米級的位移測量精度。 與傳統(tǒng)的地基合成孔徑雷達相比，本論文通過引入合成寬帶信號處理技術(shù)，進一步提高了變形監(jiān)測雷達距離向分辨率。
[Abstract]:In recent years, various large buildings, such as cross river bridges, reservoir dams and skyscrapers, have brought many conveniences to our production and life, but they will deform in the process of use, especially in a disaster environment. When the amount of deformation exceeds the range that it can bear, it will cause catastrophic consequences. Measurement is the main means of hazard warning and an important method to analyze the deformation mechanism of buildings.
In this paper, a wide-band synthetic aperture deformation monitoring radar system and method are studied in this paper. By using synthetic aperture technology, the azimuth resolution is improved. The range resolution is improved by using synthetic broadband technology. The displacement is obtained by using interferometry. The radar radiation multiband signal is illuminated. The processing process of the received signal is as follows: Based on the Doppler algorithm of SAR imaging distance, the signal of each subband is matched and filtered, and the signal range of UWB radar is compressed by coherent synthesis, then the distance correction, azimuth matching filtering and compression imaging are carried out. The basic working principle of the synthetic wideband signal processing is analyzed with the linear frequency modulation signal and the step frequency signal as an example. The paper also discusses the process of radar signal processing and the relation between the parameters of the non full aperture imaging under the condition of the foundation environment and the orbit length limited. The theoretical analysis and simulation results show that this paper is the paper. The distance resolution and 0.4m azimuth resolution of 0.1M and millimeter level displacement measurement accuracy can be achieved at the distance monitoring object 50m.
Compared with the traditional ground-based synthetic aperture radar, the synthetic broadband signal processing technology is introduced in this paper to further improve the range resolution of the deformation monitoring radar.
【學位授予單位】：重慶大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TN957.51

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