本文關(guān)鍵詞： 埋地管道 脈沖激勵 瞬變電磁法 腐蝕檢測　出處：《南昌航空大學》2015年碩士論文　論文類型：學位論文

【摘要】：管道運輸在國民生產(chǎn)、生活中占有重要地位,保障管道運輸安全意義重大。然而,隨著服役時間的增加,大量管線尤其是埋地管線逐漸進入事故頻發(fā)的“中老齡”時期,定期、有針對性地進行管道修補與替換顯得十分必要。腐蝕是導(dǎo)致埋地管道失效的主要原因之一,針對這一問題,本文提出了基于瞬變電磁法(TEM)的脈沖激勵連續(xù)電磁檢測方法,可對埋地管道進行非開挖腐蝕評價,檢測效率高且準確性較好。本文首先介紹了埋地管道失效的原因及現(xiàn)有的非開挖檢測方法,并論述了脈沖激勵連續(xù)檢測的相關(guān)理論,包括TEM用于埋地管道檢測的原理、檢測過程中產(chǎn)生的各信號特征、連續(xù)檢測的可行性與后期數(shù)據(jù)處理中的剩余壁厚反演方法等。其次,討論了傳感器裝置中的發(fā)射線圈與接收線圈參數(shù)對檢測結(jié)果的影響,并結(jié)合理論計算與試驗對傳感器進行了優(yōu)化設(shè)計,對加補償線圈與磁芯這兩種優(yōu)化后的傳感器性能進行了分析。然后,結(jié)合室內(nèi)試驗環(huán)境,對連續(xù)檢測方法與傳統(tǒng)定點檢測方法的檢測效果進行了對比,驗證了連續(xù)檢測方法的可行性、準確性及其高效性,此外,還通過相應(yīng)試驗及討論,對影響連續(xù)檢測結(jié)果的因素與加磁芯的傳感器性能分別進行了分析與驗證。最后,介紹了本文所述方法在實際應(yīng)用中的檢測流程,通過實際工程應(yīng)用進一步驗證了脈沖激勵連續(xù)檢測方法的可行性。本課題的研究豐富了埋地管道非開挖腐蝕檢測方法,對指導(dǎo)在役埋地管道安全運營有一定現(xiàn)實意義。
[Abstract]:Pipeline transportation plays an important role in national production and daily life. It is of great significance to ensure the safety of pipeline transportation. However, with the increase of service time. A large number of pipelines, especially buried pipelines, have gradually entered the "middle and old age" period of frequent accidents. It is necessary to repair and replace pipelines. Corrosion is one of the main causes of pipeline failure. In this paper, a pulse excited continuous electromagnetic detection method based on transient electromagnetic method (TEM) is proposed, which can be used to evaluate the corrosion of buried pipelines without excavation. The detection efficiency is high and the accuracy is good. Firstly, this paper introduces the reasons of buried pipeline failure and the existing non-excavation detection methods, and discusses the theory of pulse excitation continuous detection. It includes the principle of TEM used in buried pipeline detection, the characteristics of signals generated in the detection process, the feasibility of continuous detection and the inversion method of residual wall thickness in later data processing. Secondly. The influence of the parameters of the transmitting coil and the receiving coil in the sensor device on the detection results is discussed, and the optimal design of the sensor is carried out in combination with the theoretical calculation and the experiment. The performance of the two optimized sensors with compensation coil and magnetic core is analyzed. Then, combined with the indoor test environment, the detection effect of the continuous detection method and the traditional fixed-point detection method is compared. The feasibility, accuracy and efficiency of the continuous detection method are verified. In addition, the corresponding experiments and discussions are carried out. The factors affecting the continuous detection results and the performance of the sensor with magnetic core are analyzed and verified respectively. Finally, the detection flow of the method described in this paper in practical application is introduced. Through the practical engineering application, the feasibility of the pulse excitation continuous detection method is further verified. The research of this topic enriches the non-excavation corrosion detection method of buried pipeline. It is of practical significance to guide the safe operation of buried pipeline in service.
【學位授予單位】：南昌航空大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：U178

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本文編號：1467017