離心機畢業(yè)設(shè)計

baikai789 2013-07-03 12:22:04 644 瀏覽

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胡巴發(fā)哦* 2013-07-04 00:00:00

不好意思我是學(xué)電子的.

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離心機畢業(yè)設(shè)計:

畢業(yè)設(shè)計數(shù)字頻率計設(shè)計:

機械類畢業(yè)設(shè)計題目: 求偏向于機械設(shè)計方面的畢業(yè)設(shè)計題目~

函數(shù)信號發(fā)生器畢業(yè)設(shè)計:

音頻信號發(fā)生器畢業(yè)設(shè)計: 1．頻率范圍（帶寬）：200HZ~20KHZ2．輸出電壓（連續(xù)可調(diào)）3．非線性失真（在頻率范圍內(nèi)）4．負載電阻為30我不知道從何下手.................. 1．頻率范圍（帶寬）：200HZ~20KHZ 2．輸出電壓（連續(xù)可調(diào)） 3．非線性失真（在頻率范圍內(nèi)） 4．負載電阻為30 我不知道從何下手............... 展開

半導(dǎo)體激光器可以做什么畢業(yè)設(shè)計:

數(shù)字式頻率計的畢業(yè)設(shè)計: 我要做的是數(shù)字式頻率計的畢業(yè)設(shè)計（用CPLD），誰有相關(guān)論文，給我介紹介紹啊，要是有以前的論文，給我點啊，我都不明白CPLD，還需要VHDL語言編程，我更是不會了

Dcs與組態(tài)軟件畢業(yè)設(shè)計: 求畢業(yè)論文，利用組態(tài)軟件和集散系統(tǒng)實現(xiàn)工廠電能使用量的監(jiān)測，報警顯示，趨勢曲線。具體怎么設(shè)計的那種可以發(fā)我郵箱axy1211@126.com... 求畢業(yè)論文，利用組態(tài)軟件和集散系統(tǒng)實現(xiàn)工廠電能使用量的監(jiān)測，報警顯示，趨勢曲線。具體怎么設(shè)計的那種可以發(fā)我郵箱axy1211@126.com 展開

求函數(shù)信號發(fā)生器畢業(yè)設(shè)計: 設(shè)計要求：1.正弦波、三角波、方波輸出頻率范圍：1kHz～10MHz；2.具有頻率設(shè)置功能，頻率步進：100Hz；3.輸出信號頻率穩(wěn)定度：優(yōu)于10-4；4.輸出電壓幅度：在負載電阻上的電壓峰-峰值V... 設(shè)計要求：1.正弦波、三角波、方波輸出頻率范圍：1kHz～10MHz； 2.具有頻率設(shè)置功能，頻率步進：100Hz； 3.輸出信號頻率穩(wěn)定度：優(yōu)于10-4； 4.輸出電壓幅度：在負載電阻上的電壓峰-峰值Vopp≥1V； 5.失真度：用示波器觀察時無明顯失真。展開

畢業(yè)設(shè)計：車流量監(jiān)測紅外技術(shù): 這個要做實物，不用很復(fù)雜，簡單點就行希望可以有個電路圖和程序

發(fā)酵罐的PLC控制（畢業(yè)設(shè)計）: 畢業(yè)設(shè)計，題目為“發(fā)酵罐的PLC控制系統(tǒng)設(shè)計”。急求相關(guān)方面的資料。及綜述論文的寫法，Z好推薦一篇范文。謝資料資料！

超聲波傳感器可以用作哪些畢業(yè)設(shè)計:

ZEMAX，小白求助做畢業(yè)設(shè)計。: 這張2Dlayout的圖，我想知道藍色綠色紅色各表示是什么意義，然后第12光闌面實際作用是什么？

電氣畢業(yè)設(shè)計選什么好:

手機射頻方面的畢業(yè)設(shè)計: 求一個手機射頻方面的畢業(yè)設(shè)計的題目

有沒有能做plc畢業(yè)設(shè)計仿真的:

倒車測距儀畢業(yè)設(shè)計參考什么書籍:

哪有計算機嵌入式 linux畢業(yè)設(shè)計論文范文?:

基于AT89C51單片機的數(shù)字頻率計畢業(yè)設(shè)計: AT89C51單片機測頻范圍10HZ-10MHZ 多種波形 ZD是需要添加其他功能比如測幅值之類的（添加功能任意保證畢業(yè)設(shè)計的工作量不會太簡單）不支持私下交易，求淘寶鏈接之類的

畢業(yè)設(shè)計外文翻譯，高手請進，感激不盡！: ResearchonIntegrationofCoalMineMonitoringandControlSystemwithFieldBusControlSystemAbstract:AccordingtotheconstructionofcurrentcoalminemonitoringandcontrolsystemsinChina，t... Research on Integration of Coal Mine Monitoring and Control System with Field Bus Control System Abstract:According to the construction of current coal mine monitoring and control systems in China，the paper proposes three kinds of applicable schemes of integrating PLC and DCS systems with field bus technology to digitize the system and to improve the flexibility and extent of the system.Essentially，the paper introduces the integration of FCS on I/O layers.Based on a real coal mine safety-monitoring and control system applied with a CAN field bus，the major technology of system relays and extensions is discussed.We believe that one of the most applicable methods is currently replacing the connection between function-stations and field-sensors with a CAN bus on I/O layers for system integration. Key words:monitor and control;field bus control system;CAN;integration 1 Coal Mine Monitoring and Control System and Field Bus Technology As one of the most important methods to improve modern management and production efficiency in coal mines，monitoring and control technology have been widely adopted to maintain safety in coal production.Taking advantage of foreign technologies from the 1980’s，coal mine monitoring and control systems have expanded rapidly in China.At present， automatic control has come into use in most large-scale coal mines，which greatly improved production efficiency and safety and lowered costs. In China，most sub-systems of coal mine systems work independently.They follow a DCS system structure of three layers(center layer，sub-station layer and sensor layer)which consists of a tree to-pology.They are composed of sensors，sub-stations on or under the ground，center stations，multiple controllers and display terminals(Fig.1).They work with analogue signals of 4–20 mA or 200–1000 Hz. Each coupled cable can only act as one line for transmission[1]. Currently control networks have been developed for digitalization and networking.Because traditional analogue signals of 4–20 mA or 200–1000 Hz can only carry simple measurement information and con-trol signals，the communication rate is restricted. Therefore，it is necessary to digitalize and network the entire monitoring and control system. Fig.1 Traditional Structure of Coal Mine Monitoring and Control System 展開

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