本文選題：潤滑油膜測量 + 激光�。� 參考：《青島理工大學(xué)》2012年碩士論文

【摘要】：在軸承或齒輪等機械結(jié)構(gòu)中，相對運動的諸元間存在極薄的油膜從而避免嚴(yán)重的磨損，這種潤滑形式稱之為彈性流體動壓潤滑（elastohydrodynamiclubrication/EHL）。光干涉方法是EHL潤滑油膜測量的主要手段，依照入射光源的不同，光干涉測量方法可分為單色光干涉、雙色光干涉及彩色光干涉。對于單色光干涉，研究人員對其技術(shù)應(yīng)用和光學(xué)原理都進行了較為詳細(xì)的研究，而對于雙色光干涉和彩色光干涉，現(xiàn)有的研究大多圍繞技術(shù)應(yīng)用進行。針對這一研究現(xiàn)狀，本文根據(jù)薄膜光學(xué)理論，對油膜測量中的雙色光干涉和彩色光干涉的測量理論進行了研究，揭示了干涉條紋的強度和色彩的形成機制。在此基礎(chǔ)上首次提出了一種基于干涉光強調(diào)制的油膜厚度測量技術(shù)，并實驗驗證了技術(shù)的可行性。完成的主要工作包括： 1使用彩色光干涉色度學(xué)模型對彩色光干涉、偽雙色光干涉及激光雙色光干涉的光學(xué)特性進行了研究，確定了各光學(xué)參數(shù)對光干涉測量的影響，為光干涉系統(tǒng)的設(shè)計和參數(shù)設(shè)定提供了參考數(shù)據(jù)。 2利用旋轉(zhuǎn)濾波法成功消除了激光散斑對油膜厚度干涉測量系統(tǒng)的干擾，成功將激光光源引入油膜測量系統(tǒng)中，增大了可測膜厚，提高了測量精度。使用激光取代普通光源加濾光片的結(jié)構(gòu)，使用雙色激光光源取代普通光源加雙色濾光片的機構(gòu)，能夠有效降低光源的半高全寬。 3首次提出雙色光干涉光強調(diào)制油膜膜厚測量技術(shù)。�；p色光干涉圖像的RG色彩強度，再將其線性疊加（相加或相減），便可得到光強調(diào)制曲線，發(fā)現(xiàn)在較大范圍內(nèi)光強調(diào)制的極值與膜厚存在唯一對應(yīng)的關(guān)系。以此發(fā)現(xiàn)為基礎(chǔ)，提出了基于光強調(diào)制的新的雙色光干涉油膜厚度測量技術(shù)，避免了原有膜厚測量方法的弊端。 4使用VisualBasic6.0編程語言編寫了光強調(diào)制膜厚測量技術(shù)的測量程序，并成功對穩(wěn)態(tài)純滾動條件下的球-盤偽雙色光干涉圖像進行了膜厚測量，充分證明了光強調(diào)制膜厚測量方法的可行性。 5對光強調(diào)制的測量原理進行了詳細(xì)的研究，使用雙光束干涉理論及多光束干涉理論對光強調(diào)制的特性進行分析，確定了波長選擇、初相位、帶寬等對光強調(diào)制的極值點、變化周期等的影響，為測量方法的實際應(yīng)用建立了理論基礎(chǔ)。 6使用設(shè)計的雙色激光干涉系統(tǒng)，采集雙色激光干涉圖像，使用光強調(diào)制膜厚測量程序，處理雙色激光干涉圖像。利用光強調(diào)制膜厚測量技術(shù)，成功測量獲得真實條件下不同載荷下靜態(tài)球-盤接觸的膜厚。 已有的雙色光或彩色光干涉測量技術(shù)多利用干涉圖像的顏色刺激值測量油膜厚度，，測量精度依賴于嚴(yán)格的標(biāo)定，微小的實驗條件變化會導(dǎo)致測量結(jié)果產(chǎn)生極大的誤差。本研究提出的雙色光干涉光強調(diào)制膜厚測量技術(shù)，能夠有效的避免測量過程中的膜厚誤判，消除單色光干涉法及彩色光干涉法弊端的同時，最大限度的保留了兩種方法的優(yōu)勢，能夠直接確定干涉圖像中某些特殊位置的膜厚。
[Abstract]:In mechanical structures such as bearings or gears, there is a thin oil film between the elements of relative motion to avoid serious wear and tear. This form of lubrication is called elastic fluid dynamic lubrication (elastohydrodynamiclubrication/EHL). The optical interference method is the main measure of the measurement of EHL lubricating oil film. According to the difference of the incident light source, the optical interferometer is measured. The method can be divided into monochromatic light interference, double color light interference and color light interference. For monochromatic light interference, the researchers have made a more detailed study of its technical application and optical principle. For the two color light interference and color light interference, most of the existing researches are carried out around the technology applications. The theory of the measurement of double color light interference and color light interference in oil film measurement is studied. The intensity of interference fringe and the formation mechanism of color are revealed. On the basis of this, an oil film thickness measurement technology based on interference intensity modulation is first proposed, and the feasibility of the technology is verified by experiments. Including:
1 the color light interference chromaticity model is used to study the color interference, the pseudo double color interference and the optical characteristics of the laser double color light interference. The influence of the optical parameters on the optical interference measurement is determined, and the reference data for the design and parameter setting of the optical interference system are provided.
2 the interference of laser speckle to the oil film thickness interferometry system is successfully eliminated by rotating filter method. The laser light source is introduced into the oil film measurement system successfully. The thickness of the measurable film is increased and the measurement precision is improved. The structure of the ordinary light source and the filter is replaced by the laser. The double color laser light source is used instead of the ordinary light source and the double color filter. The mechanism can effectively reduce the half full width of the light source.
3 for the first time, the technique of measuring the film thickness of a double color light interference light intensity modulation oil film thickness is first proposed. The RG color intensity of the normalized double color light interference image, and then the linear superposition (adding or subtracting) the intensity modulation curve can be obtained. It is found that the extreme value of the light stress system in a larger range has the only relation to the film thickness. Light intensity modulated new two-color light interference film thickness measurement technology avoids the disadvantages of the original film thickness measurement method.
4 using the VisualBasic6.0 programming language to write the measurement program of the optical emphasis film thickness measurement technology, and successfully measured the thickness of the ball disk pseudo double color interference image under the steady state rolling condition, and fully proved the feasibility of the light emphasis film thickness measurement method.
5 the principle of light intensity modulation is studied in detail. Using the theory of double beam interference and multi beam interference theory, the characteristics of light intensity modulation are analyzed. The influence of wavelength selection, initial phase, bandwidth and so on on the extremum of intensity modulation and the change period are determined, and the theoretical basis for the practical application of the measurement method is established.
6 using the designed dual color laser interference system, the two color laser interferometric images are collected, and the two color laser interferometric images are processed with light emphasis on film thickness measurement program. The film thickness of the static ball disk contact under different loads under real conditions is successfully measured by using light emphasis film thickness measurement technology.
The existing dual color light or color optical interference measurement techniques use the color stimulus value of the interferometric image to measure the thickness of the oil film, and the measurement precision depends on the strict calibration. The change of the small experimental conditions will lead to the great error of the measurement results. When the thickness of the film is misjudged in the measurement process, the disadvantages of the monochromatic light interference method and the color light interference method are eliminated, and the advantages of the two methods are retained to the maximum limit, and the film thickness of some special positions in the interfered image can be directly determined.

【學(xué)位授予單位】：青島理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2012
【分類號】：TH744.3;TH117.2

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相關(guān)期刊論文 前2條

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本文編號：1811140