level control circuit 中文意思是什麼
level control circuit
解釋
電平控制電路-
In designing analogic circuit, we adopt programmable filter max262 to meet the system ' s command. after the step, we can make the signal ' s frequency width is wider and noise level is lower. to make the signal ' s amplitude to meet the analogic to digital device ' s command, we adopt the max551 to finish the gain control
在模擬電路部分，採用可編程濾波器max262 ，這樣就滿足了該數據採集裝置所採集的信號的頻率范圍較寬以及具有較低的噪聲水平的要求，為了使采樣到的信號的幅度滿足後面a d轉換器的要求，採用max551對采樣到的信號進行調理（增益控制） 。 -
This paper mainly aims at the characteristics of the hardware and software structure of the parallel computer on satellite, and has fulfilled researches of fault tolerant technique in three aspects of control theories and engineering : the first research of the system level fault - tolerant module is based on the system structure of the parallel computer on satellite, a kind of cold backup module and a kind of hot backup module for multiprocessor computer have been put forward. then the research of software fault tolerant technique which is based on the operate system named rtems has been carried, the mission level fault - tolerate arithmetic and the system level fault - tolerate mechanism and strategies based on the check point technique have been put forward, at the same time the self - repair technique of software which has used the technique of system re - inject has been studied. finally the technique of components level fault - tolerant based on fpga has been studied, a kind of two level fault - tolerant project which aims at the fault - tolerant module of the parallel computer on satellite has been put forward, and the augmentative of circuit that project design realization need is little, this project can avoid any breakdown of any part logic circuit of the fpga
本課題主要針對星載并行計算機體系結構及軟體結構的特點，從如下三個方面進行了容錯控制理論研究和實踐工作:首先進行了基於星載多cpu并行計算機體系結構的系統級容錯模型研究，提出了一種多cpu冷備份容錯模型和一種多cpu熱備份容錯模型;然後進行了基於rtems操作系統的軟體容錯技術研究，提出了任務級容錯調度演算法以及基於檢查點技術的系統級容錯恢復機制和策略，同時研究了利用系統重注入進行軟體在線自修復的容錯技術;最後研究了基於fpga的部件級容錯技術，提出了對容錯模塊這一星載并行計算機關鍵部件的兩級容錯方案，實現該方案所需增加的電路少，可避免板級晶元以及fpga晶元內部任何邏輯發生單點故障。 -
This paper presents a method that chopping wave is done by switch devices which consist of three - level resistance regulating module and intelligence power module ipm, and which realizes constant - current discharge of storage battery. to achieve the intelligence control of the drive protection and the discharge process of ipm, the paper designs circuit formed by igbt threshold drive pulse pwm signals. ipm fault - blocking protection circuit and microcomputer 80c196. the devices can accurately control the 0 ~ 150a discharge current and the discharge time of the storage battery and calculate the releasing power
實現蓄電池恆流放電過程智能控制是蓄電池放電裝置發展的必然趨，本文提出了一種通過三極電阻調節模塊和由智能功率模塊ipm為開關器件進行斬波從而實現蓄電池恆流放電的方法。為達到對ipm的驅動保護和放電過程的智能控制，文中設計了igbt門極驅動脈沖pwm信號形成電路和ipm故障封鎖保護電路及由單片機80c196為核心的微機控制器。本裝置能夠對蓄電池進行0 150a放電電流及放電時間的精確控制及釋放容量的計算。 -
By simulate running, this greenhouse has these advantages : the circuit is simple ; the degree of intelligent of the greenhouse is in a high level, and the control ability is reliable, which can control the environmental factor in the greenhouse within a certain range. ability of anti - interference of corresponding system is high, and hot plug can be realized, which made systematic expansion easy
經過模擬運行，該溫室具有這樣的優點：電路結構簡單；溫室的智能化程度高，控制能力可靠，它可以將溫室中的環境因子控制在一定的范圍之內；整個溫室的通信系統抗干擾能力強，而且可以實現各個通信模塊的熱拔插，非常便於系統的擴展。 -
The system is based on chopper constant current drive technique, according to the top level design idea, adopting advanced specical subdivision control integrate circuit and powerful function 80c196kc to organize the system frame, desiging the minimum system of single - chip microcomputer, multifunction i / o interface circuit, relay switch circuit, keyboard and display circuit, multifunction digital setting interface circuit and so on, utilizing the hso and hsi interface circuit which are owned by this single - chip microcomputer exclusively and its powerful command system to realize dual - degree switch control, automation orientation, automatically searching zero position, locking machine when stopping, frequency to set digitally, automatically adjusting speed through changing frequency, swithing subdivision or squarewave control, on the basis of above, the system also have the function of running according to the setting steps and the frequency, voltage and current to display through the led, etc
系統基於斬波恆流驅動技術，按照頂層設計思想，採用先進的專用細分控制電路和功能強大的80c196kc單片機來組建系統構架，設計了單片機最小系統、多功能i o介面電路、繼電器切換電路、鍵盤顯示電路和多功能數字設定介面電路等，利用該單片機獨有的hso和hsi介面及其強大的指令系統，實現了雙余度混合式步進電動機的余度切換控制、自動定位、零位自動搜索、停機鎖定、數字化頻率設定、自動調頻變速控制、細分方波切換控制，在此基礎上，該系統還設有按預置步運行、 led頻率電壓相電流顯示等功能。 -
The gain stage operates at a constant level regardless of the setting of the master level control, and so the sound of this circuit will not alter at various level settings
無論主音量控制的位置如何，放大級都可以工作於一個穩定的電平，並且不同的音量設定不會引致該電路的音色變化。 -
4. the hardware of electronic control system is developed. it includes display module whose tasks are man - machine interaction, displaying humidity and temperature, setting humidity, time, date and week, communicating with computer ; power device module which provides power of all modules and drives control equipments to accomplish intention of main control module and can provide zero crossing protection circuit, excess voltage and under voltage protection circuit and excess current protection circuit ; water sensor group, the responsibilities of which are testing the states of water and send the states to scm, then the scm control the water level after judging the states
開發並實現了電控系統的硬體部分，包括顯示模塊：主要負責人機交互，顯示濕度、溫度，修改濕度、時間、日期、星期，和主控模塊通訊；電源驅動模塊：主要提供各個模塊的電源，驅動被控設備，實現主控模塊的意圖，並能實現繼電器的過零保護，過流、過壓、欠壓保護；水位傳感器組：負責測知水位的狀態，並把此狀態送入單片機，單片機經過判斷、處理反過來控制水位，實現水位的閉環控制。 -
Firstly, the contributing factors leading to reignition and over - voltage are briefly discussed. then, with the aid the systematic simplified model and circuit equation, the thesis analyzes in detail the types and range of over - voltage of the capacitor banks under different circuit and switching conditions. the damage and the expected control level are identified
論文首先簡要論述了重燃現象及過電壓的成因;然後藉助系統簡化模型和電路方程，具體分析計算了不同電路和操作條件下投切電容器組過電壓發生的類型和幅值，明確了危害的程度和需要控制的目標水平。 -
Edri has successively take on about 1900 project of design, consultation, supervision and lump - sum project, has accumulated professional technological superiority in large area, high level classifying air - condition system, ultra pure industry gas system, ultra pure water system, automatic control system, data communication system and static prevent, vibration prevent, electromagnetic pollution control which required by large - scale integrate circuit, optical fiber cable, pharmaceutical project and electronic project, etc
Edri先後承擔了設計咨詢監理總承包工程近1900多項，對大規模集成電路光纖光纜生物製品電子工程等高新技術產品生產環境所需要的大面積高級別凈化空調系統高純工業氣體系統超純水系統自動控制系統數據通信系統以及防靜電防微振電磁環境污染控制等方面的設計具有獨特的專長。 -
The constitution, interface and control principle of main circuit, rectifier control module, inverter control module, generator ' s rotor speed and rotor position measuring module, information exchange module are discussed. specially, the methods of implementing signals level match in multi - voltage system, synchronizing with pc in parameters measurement and measuring rotor speed and rotor position with high precision are explained in detail
文中討論了主電路、整流器控制模塊、逆變器控制模塊、電機轉速和轉子位置測量模塊以及信息交換模塊的組成、介面方法和控制原理，詳細說明了系統中實現不同電壓等級間信號電平匹配的方法、系統與上位機進行同步參數測量的方法以及實現高精度電機轉速和轉子位置測量的方法。 -
Chaotic switching modulation signals generated from different chaos sequences have been used to control smps. the effect of reducing the level of emi be compared. simulation results demonstrate : in the cpwm and cppm, chaos sequences generated from henon map is superior to the one generated from chua ' s circuit at lower multiples of switching frequency on reducing the level of emi ; in the ccfmfd, it has contrary results ; in the ccfmvd, chaos sequences generated from chua ' s circuit is superior to the one generated from henon map
模擬結果表明： cpwm和cppm模式下， henon映射混沌序列在較低次諧波處降低emi水平的效果要好於蔡氏電路混沌序列的效果。 ccfmfd模式則有相反的結果。對ccfmvd模式，蔡氏電路混沌序列比henon映射混沌序列降低emi水平的效果明顯要好。 -
Zero - voltage - switching three - level dc / dc converter in the thesis is developed and manufactured, and the basic operation principle and its control strategies of three - level zero - soft - switch pwm dc converter are discussed. hardware design of main system and control system is accomplished by circuit design software protel99se. the difference of leading switches and lagging switches to realize the zero - voltage switching and the reason of duty - cycle loss is emphatically argued
本課題通過三電平零電壓開關直流變換器（ zero - voltage - switchingthree - leveldc / dcconverter ）的研製，探討了三電平軟開關pwm直流變換器的基本工作原理及其控制策略，利用電路設計軟體protel99se完成了控制系統及主系統的硬體設計。 -
Chaotic switching signal obtained from chua ' s circuit was used to control buck dc / dc converter. by compared the power spectrum of input current between chaotic modulations and classical pwm, it demonstrate that chaotic switching modulations have good effect on spreading power spectrum, which can be used to reduce the level of emi and to improve emc of smps
通過對四種混沌調制模式下變換器輸入電流與周期pwm模式下輸入電流頻譜的分析比較表明，混沌調制技術在擴展頻譜方面有良好的效果，可以用於降低開關模式電源的電磁干擾（ emi ）水平，改善電磁兼容性（ emc ） 。 -
In the description of circuit design, the emphasis is paid the following hardware modules : ad / da inverter, dsp module, external program / data memory, cpld control logic, serial communication module, power module, and so on. problems and the corresponding solutions found in the design and debug stage are discussed, too. finally, the low - level software driver design is presented in detail, including system booting, initialization of dsp registers, cpld logic and timing control, drivers for asynchronous communication fifo, and drivers for ad converter
在電路模塊分析中，重點介紹了語音的輸入放大和輸出緩沖部分、 ad da轉換、 dsp語音壓縮解壓、外部程序數據存儲器、 cpld邏輯控制、串列收發組件、電源供電以及dsp的jtag介面等等，並且給出了在硬體電路設計和調試過程中的問題與解決辦法。 -
Automatic gain control ( agc ) circuit is a kind of automatic control circuit. it can regulate the output - signal to some specified power level or limit it to a small range while the input - signal ’ s power level is changing sharply. it is very important in communication equipments, especially in the receiving part
自動增益控制（ agc : automaticgaincontrol ）電路是一種在輸入信號幅度變化很大的情況下，使輸出信號幅度保持恆定或僅在較小范圍內變化的自動控制電路;在通信設備，特別是通信接收設備中起著非常重要的作用。 -
In this paper, the digital image real - time processing system was a very important part of fed driving circuit system. altera fpga chip was used to complete operation on reading and writing and timing control of fed image data. the image process algorithms mainly used gray - level transformation in the theory of image enhancement, and the algorithm realized luminance non - uniformity control, gray - level non - linear correction and automatic power control for fed
本文設計的基於fpga技術的數字圖像實時處理系統是fed驅動系統中的重要組成部分，其核心部分採用了altera公司的fpga晶元，實現對fed圖像數據讀、寫操作和時序控制等，而圖像處理的演算法部分主要是利用圖像增強技術理論中的灰度變換方法，實現對fed的亮度非均勻性控制、灰度非線性校正以及fed的自動功率控制。
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