本文選題：交變電磁場(chǎng)測(cè)量技術(shù) + U形線圈激勵(lì)��； 參考：《沈陽(yáng)工業(yè)大學(xué)》2015年碩士論文

【摘要】：目前，我國(guó)的石油開(kāi)發(fā)的范圍已經(jīng)邁向海底資源，我國(guó)在沿海的海上石油勘探平臺(tái)數(shù)量不斷增加。這些平臺(tái)每年都要進(jìn)行例行的安全隱患檢測(cè)，一般情況下，需要檢測(cè)的均為海下鋼架、管道等。普通的檢測(cè)方法已經(jīng)不能滿足檢測(cè)需要，隨著交變電磁場(chǎng)檢測(cè)技術(shù)的出現(xiàn)，這種技術(shù)已經(jīng)被大面積應(yīng)用在海底檢測(cè)，但是國(guó)外檢測(cè)經(jīng)費(fèi)昂貴，不利于這種技術(shù)的大力發(fā)展，因此研究交變電磁場(chǎng)檢測(cè)技術(shù)的理論，推動(dòng)國(guó)內(nèi)交變電磁場(chǎng)技術(shù)的發(fā)展非常有必要。 本文研究了不同的電磁類無(wú)損檢測(cè)技術(shù)以及交變磁場(chǎng)檢測(cè)技術(shù)的國(guó)內(nèi)外現(xiàn)狀，推導(dǎo)了各種檢測(cè)技術(shù)的基本概念與原理。在分析了交變磁場(chǎng)測(cè)量技術(shù)特點(diǎn)的基礎(chǔ)上，對(duì)交變電磁場(chǎng)檢測(cè)原理進(jìn)行了根本性的探討，提出了基于U型線圈激勵(lì)的交變電磁場(chǎng)檢測(cè)平臺(tái)的總體方案，設(shè)計(jì)了矩形線圈探頭激勵(lì)。在此基礎(chǔ)上,使用comsol軟件進(jìn)行激勵(lì)部分與檢測(cè)部分的仿真分析，對(duì)于其不同的檢測(cè)條件進(jìn)行對(duì)比分析。設(shè)計(jì)了激勵(lì)信號(hào)發(fā)生電路，磁芯，傳感器，后信號(hào)處理電路。用Altium Desinger軟件設(shè)計(jì)了信號(hào)調(diào)理電路，采用Labview界面編程技術(shù)完成了測(cè)試軟件的編制，用復(fù)合的二階濾波電路實(shí)現(xiàn)有效的消除噪聲，得出多組不同數(shù)據(jù)對(duì)檢測(cè)結(jié)果進(jìn)行對(duì)比分析。結(jié)合交變磁場(chǎng)技術(shù)理論模型，，通過(guò)獨(dú)特的檢測(cè)方式，結(jié)合傳感器，信號(hào)處理電路，數(shù)據(jù)采集軟件，構(gòu)建了交變電磁場(chǎng)檢測(cè)平臺(tái)，對(duì)鋼板裂紋進(jìn)行了試驗(yàn)，得出電壓峰值變化規(guī)律，經(jīng)過(guò)多組測(cè)試數(shù)據(jù)的對(duì)比分析，得出鋼板裂紋的長(zhǎng)度與深度的特性關(guān)系。 本文用設(shè)計(jì)完成的平臺(tái)進(jìn)行了多組實(shí)驗(yàn)，測(cè)量的數(shù)據(jù)與理論分析基本相符，證明了交變磁場(chǎng)測(cè)量方法測(cè)量鋼板表面裂紋的可行性與有效性。
[Abstract]:At present, the scope of petroleum exploitation in China has moved towards seabed resources, and the number of offshore oil exploration platforms in China has been increasing. These platforms carry out routine hidden safety detection every year. Generally, all the platforms need to be tested, such as steel frames, pipelines and so on. With the emergence of alternating electromagnetic field detection technology, this technology has been widely used in seabed detection, but the cost of detection abroad is expensive, which is not conducive to the development of this technology. Therefore, it is necessary to study the theory of alternating electromagnetic field detection technology and promote the development of alternating electromagnetic field technology in China. In this paper, the current situation of different electromagnetic nondestructive testing techniques and alternating magnetic field testing techniques at home and abroad has been studied, and the basic concepts and principles of various detection techniques have been deduced. On the basis of analyzing the technical characteristics of alternating magnetic field measurement, the principle of alternating electromagnetic field detection is discussed, and the overall scheme of alternating electromagnetic field detection platform based on U-coil excitation is put forward. The rectangular coil probe excitation is designed. On this basis, comsol software is used to simulate the excitation part and the detection part, and the different detection conditions are compared and analyzed. The exciting signal generating circuit, magnetic core, sensor and post signal processing circuit are designed. The signal conditioning circuit is designed with Altium Desinger software, the test software is programmed by Labview interface programming technology, the noise is effectively eliminated by using compound second-order filter circuit, and the detection results are compared and analyzed with many different groups of data. Combined with the theory model of alternating magnetic field technology, through the unique detection method, the sensor, the signal processing circuit and the data acquisition software, an alternating electromagnetic field detection platform was constructed, and the crack of steel plate was tested. The law of peak voltage variation is obtained and the characteristic relationship between length and depth of crack in steel plate is obtained by comparison and analysis of multiple test data. In this paper, many experiments have been carried out on the platform designed and completed, and the measured data are in good agreement with the theoretical analysis, which proves the feasibility and validity of the alternating magnetic field measurement method for measuring the surface cracks of steel plate.
【學(xué)位授予單位】：沈陽(yáng)工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TG115.28

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