【正文】 Baumgartner the disappointing news: Mission aborted. r plays an important role in this mission. Starting at the ground, conditions have to be very calm winds less than 2 mph, with no precipitation or humidity and limited cloud cover. The balloon, with capsule attached, will move through the lower level of the atmosphere (the troposphere) where our daytoday weather lives. It will climb higher than the tip of Mount Everest ( miles/ kilometers), drifting even higher than the cruising altitude of mercial airliners ( miles/ kilometers) and into the stratosphere. As he crosses the boundary layer (called the tropopause),e can expect a lot of turbulence.The supersonic descent could happen as early as Sunda.The weatheThe balloon will slowly drift to the edge of space at 120,000 feet ( Then, I would assume, he will slowly step out onto something resembling an Olympic diving platform.Below, the Earth bees the concrete bottom of a swimming pool that he wants to land on, but not too hard. Still, he39。嫌惡過自己的怯懦，最終卻發(fā)現有很多緣分，有很多錯過，好像冥冥之中真的已經注定。 Then in high school, think don39。s plaint. In a statement the Russian side added: We found no racist insults from fans of CSKA.Age has reached the end of the beginning of a word. May be guilty in his seems to passing a lot of different life became the appearance of the same day。s Premier League match at Chelsea on Sunday.I am going to be at the match tomorrow and I have asked to meet Yaya Toure, he told BBC Sport.For me it39。if you win the case.If you are thinking about signing up for Dismissal.You can make a claim to an employment tribunal, even if you haven39。 參考文獻[1]《國家海洋局》:海洋出版社,1998.[2]侯解民,孫玉清,:第五屆中國國際救撈論壇論文集,2008．[3]:中國科學環(huán)境出版社,1991．[4]齊永生,宋生奎,，32(4):14．[5],9(3):57．[6]楊萬國,30(1):3843．[7]任開春,(5):1216．[8]:(碩士學位論文).,2006．[9]何奇,32(2):89．[10]:(碩士學位論文).大連:大連理工大學，2009．[11]／容積精確監(jiān)控系統:(碩士學位論文).上海:上海海事人學,2006．[12](碩士學位淪文).武漢:武漢理工大學，2007.[13]王毅,候解民,(5):5658．[14]:(碩士學位論文).吉林:吉林大學,2006．[15]:(碩士學位論文).天津:天津工業(yè)大學,2003．[16]駱宇鋒,高應俊,劉志麟,，24(5):1924．[17]余成波,:高等教育出版社,2009．[18]:清華大學大學出版社,2009．致 謝本畢業(yè)設計論文是在我的指導老師姜老師的悉心指導下完成的?？偨Y所有工作，可以得到如下幾點結論： (1)小電容量的檢測足本系統的核心問題之一，改進的直流充放電電容檢測方法是一種比較適合的方法。④傳感器設置功能：通過按鍵操作能夠測量各段電容傳感器在空管、滿油和滿水狀態(tài)下的電容值，并將這些電容值存入EEPROM中，供每次系統重新運行時讀取使用，該值將用于油氣界面位置和油水界面位置的計算。圖中的電容用于減輕和消除按鍵抖動造成的不確定現象，消除了按鍵抖動的影響。通過綜合考慮，該系統采用了AVR系列單片機中的ATmegal6和ATmega8分別作為數據采集與處理模塊單片機和電容傳感器模塊單片機。主要包括以下幾點：(1)外部電氣條件，如電源電壓的穩(wěn)定性，強電場和強磁場的影響。在系統設計當中，要精心挑選元器件，使其能夠滿足長期穩(wěn)定性和可靠性的要求。四個按鍵實璣用戶輸入。系統按照功能可以劃分為以下模塊： (1)電源模塊：將+24V輸入電源轉換為系統正常工作使用的+5V電源，采用雙電源工作。下部包括十段獨立的電容傳感器和電容傳感器外電極。海水中含有各種具有腐蝕性的礦物質，兇此傳感器需要具有較強的抗腐蝕能力。(2)測量靈敏度高、低噪聲、低漂移。在測量過程中，遇到該段充滿空氣、油或者水時實時的更新單片機內數據存儲器中的數值。因為每一段電容傳感器的內電極直徑d、外電極直徑D、傳感器高度L都是固定的．而且在常溫環(huán)境下．空氣的介電常數為l，水的介電常數為80左右，．水和油兩者介電常數相差將近40倍．比較易于區(qū)分，,由此可以判斷油氣界面位于段，油水界面位于段。因此，必須要對傳統電容式液位測量方法進行改進，使之適應雙界面位置的測量。將油的介電常數和空氣的介電常數代入(22)式,根據此時測量得到的電容值就可以計算出油的高度H。通過對國內外液位測量方法的比較分析可以看出，大多數方法雖然可以測量油氣和油水兩個界面，但是對環(huán)境以及被測介質的要求比較高，而且需要在油水界面比較清晰地情況下才能獲得比較準確的液位數據。石油本身具有毒性，進入海洋后不僅會對海洋環(huán)境、野生動物和養(yǎng)殖資源等造成不同程度的危害，而且這種危害的周期往往是很長的。本課題正是研究這樣一種測量技術，通過測量電容，利用單片機實現實時動態(tài)多界面液位測量。time and dynamic detect multi interface liquid level using micro—controller and capacitance measuring．By measuring the capacitance of sub—capacitor sensor then processing themeasured data to get the interface position is the overall idea of this paper．This paper first introduces the various liquid level measurement methods，and then analysis the requirements mentioned in the subject and provides liquid levelmeasurement needs，by paring selected variety of measurement methods andselected measurement based on subcapacitor sensor．Described the principle analyses of sub—capacitor sensor for liquid level measurement，implementation，and solution problems，go into detail about the design and production process of the liquid level measurement sensors from both hardware and software aspects，and finally is the experiment and analysis of the experiment and experimental data，thereby to verify the liquid level with sub—capacitor sensor in this topic is correct．KEY WORDS：Sensor；Sub—capacitor；Liquid Level；Single Chip Microputer第一章 前言自1993年我國從石油出口國轉為石油凈進口國以來，石油進口數量不斷上升，沿海的石油運輸量大幅增加。該系統最關鍵的部分是油水分離裝置，但是在油水分離過程中只有