發(fā)布時間：2018-06-17 11:37

  本文選題：Michelson干涉儀 + 鹽度傳感器��； 參考：《山東科技大學(xué)》2017年碩士論文

【摘要】：精確檢測水體鹽度,在海洋資源的開發(fā),農(nóng)業(yè)環(huán)境的監(jiān)測與治理,海洋氣候預(yù)測,礦產(chǎn)勘測以及軍事應(yīng)用等方面都有重要的意義。目前發(fā)展比較成熟的鹽度測量方法主要包括:電導(dǎo)率法、比重法、折射率法、等離子共振法、遙感微波法和光纖傳感法等。然而,隨著各個領(lǐng)域?qū)τ邴}度檢測需求的不斷發(fā)展,對高精度、小體積和大量程的鹽度傳感器的需求迫切。全光纖Michelson干涉儀是近年來發(fā)展起來的一種高精度的光纖傳感器結(jié)構(gòu),由于其傳感原理來源于光在同一根光纖中的干涉,使得該類傳感器具有集成性好、易于實現(xiàn)、體積小、量程大和靈敏度高等特點,與普通機(jī)械類和電子類傳感器相比,光纖Michelson干涉式傳感器在液體濃度和成分檢測方面體現(xiàn)了獨特的優(yōu)勢。本文以基于全光纖Michelson干涉儀的鹽度傳感器為研究目標(biāo)。該類傳感器較現(xiàn)有的光纖光柵類鹽度傳感器,具有更高的靈敏度,更低的制作成本和更易于實現(xiàn),本文中系統(tǒng)地研究了該類傳感器的結(jié)構(gòu)和傳感特性。主要工作包括:1.介紹幾種主要的鹽度檢測技術(shù),概括鹽度傳感器的國內(nèi)外現(xiàn)狀,論述鹽度檢測在光纖傳感領(lǐng)域的研究現(xiàn)狀,綜述光纖Michelson干涉儀液體濃度傳感器的發(fā)展情況。2.光纖Michelson干涉式光纖傳感器的工作原理和傳感理論研究模型,主要包括光纖Michelson干涉儀液體折射率、應(yīng)力和溫度的傳感基理研究。3.利用全光纖Mach-Zehnder干涉儀進(jìn)行高溫檢測研究,從全光纖Mach-Zehnder干涉儀溫度傳感原理出發(fā),實驗研究了其高溫傳感特性,最高溫度達(dá)900℃,傳感器靈敏度為22pm/℃。4.光纖Michelson干涉儀鹽度傳感器溫度及液體濃度進(jìn)行實驗研究,主要對其溫度和液體濃度傳感特性進(jìn)行實驗研究。5.涂覆聚酰亞胺薄膜的光纖Michelson干涉型光纖鹽度傳感器特性的實驗研究,通過對比涂覆聚酰亞胺薄膜厚度的鹽度傳感特性之間的關(guān)系實驗。隨著涂覆膜厚度的增加,傳感器的靈敏度增大,研制的傳感器靈敏度最大可達(dá) 19.268pm/%。通過對比4, 5兩章可得到敏感膜鹽度傳感器靈敏度明顯高于未涂覆的該類傳感器的結(jié)論,該傳感器除了用于海水等鹽度檢測,還可以在生物醫(yī)學(xué)和環(huán)境監(jiān)測等領(lǐng)域應(yīng)用。
[Abstract]:Accurate detection of water salinity is of great significance in the exploitation of marine resources, monitoring and management of agricultural environment, marine climate prediction, mineral exploration and military application. At present, the developed methods of salinity measurement mainly include: conductivity method, specific gravity method, refractive index method, plasmon resonance method, remote sensing microwave method and optical fiber sensing method and so on. However, with the continuous development of the demand for salinity detection in various fields, the demand for high precision, small volume and large range salinity sensors is urgent. All optical fiber Michelson interferometer is a kind of high precision optical fiber sensor structure developed in recent years. Because its sensing principle comes from the interference of light in the same optical fiber, this kind of sensor has good integration, easy to realize and small volume. Compared with conventional mechanical and electronic sensors, optical fiber Michelson interferometric sensor has a unique advantage in liquid concentration and composition detection. The aim of this thesis is to study the salinity sensor based on all optical fiber Michelson interferometer. This kind of sensor has higher sensitivity, lower fabrication cost and easier realization than the existing fiber Bragg grating type salinity sensor. In this paper, the structure and sensing characteristics of this kind of sensor are systematically studied. The main tasks include: 1. This paper introduces several main salinity detection techniques, summarizes the present situation of salinity sensor at home and abroad, discusses the research status of salinity measurement in the field of optical fiber sensor, and summarizes the development of optical fiber Michelson interferometer liquid concentration sensor. The working principle and sensing theory model of optical fiber Michelson interferometric optical fiber sensor mainly include the sensing principle of liquid refractive index stress and temperature of optical fiber Michelson interferometer. Based on the temperature sensing principle of all-fiber Mach-Zehnder interferometer, the high temperature sensing characteristics of all fiber Mach-Zehnder interferometer are studied experimentally. The maximum temperature is 900 鈩，

本文編號：2030903