線交換集中器 的英文怎麼說

中文拼音 [xiànjiāohuànjízhōngqì]
線交換集中器 英文
line switching concentrator
  • 線 : 名詞1 （用絲、棉、金屬等製成的細長的東西） thread; string; wire 2 [數學] （一個點任意移動所構成的...
  • 交 : Ⅰ動詞1 （把事物轉移給有關方面） hand over; give up; deliver 2 （到某一時辰或季節） reach （a cert...
  • 換 : 動詞1. （給人東西同時從他那裡取得別的東西） exchange; barter; trade 2. （變換; 更換） change 3. （兌換） exchange; cash
  • 集 : gatherassemblecollect
  • 器 : 名詞1. （器具） implement; utensil; ware 2. （器官） organ 3. （度量; 才能） capacity; talent 4. （姓氏） a surname
  • 集中 : concentratecentralizefocusamassgroupmassingput togather
  1. Through analysising the characteristics of the power system with floating neutral point deeply, the paper puts forward a new plan of single - phase to ground fault line selection on the base of s ' s signal injecton method and gives the hardware and software design. in this design, the high speed sampling and data processing is carried out through using dsp processor ; the large electrice current is drived through the application of a high - performance audio power amplifier and transformer ; the communication between host computer and detectors is realized through rs485 bus technology ; the difference multilevel frequency - selected amplifier is designed and the feeble signal of space is sampled on the base of the theory of magnetic induction ; the interface between dsp and exterior chip and rs485 interface logical is designed through using fpga ; the using of lcd module and keyboard interfacing chip makes the interface between human and machine ; the programme of host computer and detectors is designed through using blocking design method

    在本設計中，採用高速的dsp處理器，實現了對故障特徵信息的高速採集與處理;採用大功率的功放晶元與變壓器配合的方法，實現了大電流信號的驅動輸出;採用485總線技術，組建了裝置主機與多探測器之間的主從式通訊網路，實現了多干擾條件下裝置主機與多探測器的可靠通訊;設計了差分式多級選頻放大電路，採用磁感應的方法實現了對空間微弱信號的接收;利用fpga技術，實現了控制器與多外設的介面及數字信號的串並轉換;採用了先進的lcd液晶顯示模塊及鍵盤介面晶元，設計了人機信息交互的介面;採用了模塊化的軟體設計方法，開發了裝置主機及探測器的軟體程序。
  2. Although there have been many application instances in the field of input / output device technology, we need an specific project and technology route aimed at an given application. in this thesis, we combine the introduction and analysis of relative technology to describe the accomplishment of a coordinate collecting device which is based on incremental rotary encoder. this device is an specific device applied to collect the corrdinate displacement of ground image ’ s three - dimensional model created by full digital photogrammetric station. cpld chip and vhdl are applied in this device to carry out the following work : phase control of the electrical pulse created by incremental rotary encoder, counting the number of electrical pulse, controling the state of signal processing circuit, exchanging data between this circuit and pci control

    本文結合相關技術的介紹和分析，描述了一個基於增量式旋轉編碼器的坐標參量採集介面卡的實現，此介面卡是一種用於採集全數字攝影測量系統地面影像模型坐標位移量的專用設備，該設備採用cpld器件和vhdl語言實現增量式旋轉編碼器的脈沖信號鑒相和計數、信號處理部分的狀態控制以及和pci總線晶元ch365之間的數據交換和通信功能，同時該設備的驅動程序基於wdm模式，並且配置有結構良好的動態鏈接庫程序作為系統軟體和驅動程序之間的數據和控制交互中間介面，能夠方便地運行在windows98 / 2000 / xp操作系統平臺上，具有實時性強、工作穩定、通用性較好和性價比高等特點。
  3. Motion control is a comprehensive subject. modern ac drive is a important embranchment in the field of motion control. however, it is difficult to rea1ize high - performance ac drive systems because induction motors are a kind of strongly - coupled nonlinear system with many variables and the torque is not easy to control. with vector control technology decoupling and torque control of ac motor are solved. the basic idea of vector control is that three - phase system is equiva1ent to two - phase system by coordinate transformation and it realizes the decoupling between field current and torque current of the stator in order to control the flux and current respectively, thus induction motor can be considered dc motor and high performance is achieved easily. with the progress of electric and electronic technology and the development of computer, high - integrated special modules and high - precision digital signal processor ( dsp ) are applied to ac drive so that vector control has been developed rapidly

    但是高性能的交流調速系統實現很困難，這是因為交流電機是多變量、強耦合的非線性系統，不易實現高性能轉矩控制。矢量控制技術則解決了交流電機解耦與轉矩控制問題，其基本思路? ?應用坐標變換將三相等效為二相，實現定子勵磁電流分量與轉矩電流分量之間的解耦，達到對交流電機磁鏈與電流分別控制的目的，交流電機等效為直流電機實現高性能調速。隨著電力電子技術的進步，計算機技術飛躍發展，高度集成的專用模塊和高精度的數字信號處理器應用於交流傳動系統中，促進矢量控制迅猛發展，日趨成熟。
  4. Measure and control unit adopted 16 - bit, high - speed a / d converter, it can guarantee the speed and precision of alternating sample. the part of communication adopted can bus to transmit the data, it was suitable for real - time control and can guarantee dependability. it adopted the can bus adapter of yan - hua company whose type was pcl - 841 to communicate with processor unit the processor unit adopted industrial pc, which can guarantee the system work well for a long time

    其中下位裝置採用西門子公司的高性能十六位處理器c167cr - lm ，其內嵌can總線控制器便於通過can總線與上位機進行通訊，數據採集部分採用十六位高速a d轉換器從而保證了交流采樣的速度與精度，通訊部分採用可靠性高，適于現場實時控制的can總線來傳輸數據，與上位機介面採用研華公司的型號為pcl - 841的can總線適配器，為保證系統長時間可靠運行上位機採用工控機。
  5. It has been playing an important role in equipping all kinds of arms and services for campaigns, tactical exercises and emergent actions etc. based on the detailed analysis of the exchange ' s architecture and implementing, this thesis points out some disadvantages of the device, such as too many absolute components, not very high enough reliability and security, very large size and weight, operating and maintaining difficultly. considering low power requirement and man - machine interface optimizing design at the same time, the thesis come up with an integrated design scheme to the previous device based on " mcu + cpld / fpga architecture " : ( 1 ) signal frequency dividing, timing frequency producing, 20 customers " led states controlling are implemented in cpld ; ( 2 ) decoding, latching data and controlling signals are implemented in cpld by bus interface between mcu and cpld ; ( 3 ) chip selecting principles and mcu idle mode design are completed under the consideration of low power requirement ; ( 4 ) operation by chinese lcd menus is adopted in the man - machine interface

    本項目以該交換機為研究對象，在詳細分析原設備的系統結構和功能實現方式的基礎上，指出該機型在使用過程中存在技術相對陳舊、分立元件過多、可靠性和保密性不夠、體積大、重量大、維修困難等問題，同時結合系統的低功耗需求和優化人機介面設計，本文提出基於「單片機+ cpld fpga體系結構」的集成化設計方案：在cpld中實現信號音分頻和計時頻率生成電路、 20路用戶led狀態控制電路； cpld與單片機以總線介面方式實現譯碼、數據和控制信號鎖存功能的vhdl設計；基於低功耗設計的器件選型方案和單片機待機模式設計；人機介面的lcd菜單操作方式。
  6. It is avoiding to be engrossed bandwidth by useless fi 11ing data that is transformed in network. in order to assure the rea1 tiine of network transport, network is maintained a 1 ight - - 1oad status. it 1s the ways that fie1dbus is powered providing work - - power for fie1d device by spare wires among 1 inking - - wires

    我們用全雙工交換式以太網技術解決傳輸中通信的實時性和確定性問題，便用交換式集線器擴大網路帶寬，使用udp通信協議保證報文傳輸的有效載荷、避免不必要的填充域數據在網路上傳輸所佔用的帶寬，使網路保持在輕負荷工作條件下，進一步保證網路傳輸的實時性。
  7. This work mainly studies the influence of cross phase modulation ( xpm ) on dwdm systems and schemes to suppress the influence. in addition, all - optical wavelength converter based on xpm in optical fiber is studied

    本文主要研究密集波分復用系統中的一種重要的非線性效應? ?交叉相位調制對系統性能的影響及減小其影響的方法，並研究基於光纖中交叉相位調制的波長轉換器。
分享友人
分享到 Line

分享到臉書