【摘要】：隨著光纖傳感技術(shù)的發(fā)展，光纖傳感器廣泛應(yīng)用于壓力傳感領(lǐng)域，因此在滲流力學(xué)中的實驗探索很有意義。光纖傳感器與以往各類型傳感器相比較，具有靈敏度高、體積小、結(jié)構(gòu)簡單、電絕緣性好、抗電磁干擾、耐腐蝕、防爆等優(yōu)點。自從光纖傳感器問世以來，在滲流力學(xué)中的研究就得到了全世界科學(xué)界和科研機構(gòu)的重視。 本文利用PROFIBUS現(xiàn)場總線技術(shù)搭建了一套128路的數(shù)據(jù)采集系統(tǒng)，并利用該系統(tǒng)設(shè)計完成了兩個滲流力學(xué)實驗，充分利用了該系統(tǒng)能夠?qū)崟r、準確的實現(xiàn)多點同時測量并且具有較高分辨率和測量精度的特點。同時本文演示了一種新型的基于外腔式光纖法珀干涉儀的光纖傳感器來測量煤層氣井液面。通過模擬煤層氣井液面的測量實驗，結(jié)果證實方案有效，能夠準確測出液面位置,相對誤差為1.48%，相比較傳統(tǒng)電學(xué)測量方法，該方案更加安全有效。 本文主要研究內(nèi)容如下： 第一章綜述了光纖EFPI傳感器的基本傳感原理和應(yīng)用，簡單介紹了本課題的研究背景以及國內(nèi)外發(fā)展現(xiàn)狀，最后概括了本課題的研究內(nèi)容。 第二章提出了PROFIBUS數(shù)據(jù)采集系統(tǒng)的整體方案，，并分別從采集系統(tǒng)的體系結(jié)構(gòu)和系統(tǒng)設(shè)計部分進行詳細闡述，最后介紹了該采集系統(tǒng)的技術(shù)參數(shù)和功能。 第三章對基于PROFIBUS數(shù)據(jù)采集系統(tǒng)的滲流力學(xué)實驗進行了詳細的闡述，包括毛細管阻力測試實驗和巖心滲透率測試實驗。 第四章利用基于外腔式F-P干涉儀的滲流光纖實驗系統(tǒng)對滲流力學(xué)中煤層氣井液面位置測量實驗進行設(shè)計研究，包括原理分析，傳感器設(shè)計以及實驗驗證。 第五章總結(jié)了本課題的主要研究工作，并對本課題的后續(xù)研究方向提出了展望。
[Abstract]:With the development of optical fiber sensing technology, optical fiber sensors are widely used in the field of pressure sensing, so the experimental exploration in percolation mechanics is very meaningful. Compared with previous sensors, optical fiber sensors have the advantages of high sensitivity, small volume, simple structure, good electrical insulation, anti-electromagnetic interference, corrosion resistance, explosion-proof and so on. Since the advent of the sensor, the research on seepage mechanics has been paid much attention by the scientific circles and research institutes all over the world.
In this paper, a 128-channel data acquisition system based on PROFIBUS fieldbus technology is constructed, and two seepage mechanics experiments are designed and completed with this system. The system makes full use of the characteristics of real-time, accurate multi-point simultaneous measurement with high resolution and measurement accuracy. At the same time, a new type of data acquisition system is demonstrated. An optical fiber sensor based on external cavity Fabry-Perot interferometer is used to measure the liquid level of coalbed methane wells. The experimental results of simulating the liquid level of coalbed methane wells show that the scheme is effective and the relative error is 1.48%. Compared with the traditional electrical measurement method, the scheme is more safe and effective.
The main contents of this paper are as follows:
In the first chapter, the basic sensing principle and application of the fiber-optic EFPI sensor are summarized, and the research background and development status at home and abroad are briefly introduced.
In the second chapter, the whole scheme of PROFIBUS data acquisition system is proposed, and the system structure and system design are described in detail. Finally, the technical parameters and functions of the acquisition system are introduced.
In the third chapter, the seepage mechanics experiment based on PROFIBUS data acquisition system is described in detail, including capillary resistance test and core permeability test.
In the fourth chapter, the seepage optical fiber experiment system based on external cavity F-P interferometer is used to design and study the experiment of measuring the liquid level of coalbed methane well in seepage mechanics, including principle analysis, sensor design and experimental verification.
The fifth chapter summarizes the main research work of this topic, and puts forward the prospect of the follow-up research direction of this topic.
【學(xué)位授予單位】：北京理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TE312;TP274.2

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