signal coder 中文意思是什麼

It can directly control and drive the stepmotor and dc servomotor, and it can control the ac servomotor by controlling the ac transducer, and it also has the function of detecting the feedback position signal of photoelectric coder and induction phase shifter

它能直接控制和驅動步進電機和直流伺服電機，並可通過控制交流變頻器對交流伺服電機進行控制，而且具有光電編碼器和感應移相器位置反饋信號檢測功能。

At the aspect of hardware design, it adopts pulse distributor and the technology of single polar voltage drive to accomplish the function of controlling and driving stepmotor ; it adopts the technology of pulse width modulation and cmos h - bridge drive to accomplish the function of controlling and driving dc servomotor ; it adopts d / a convertor to accomplish the function of controlling ac transducer ; it adopts the technology of digital phase detection to accomplish the function of detecting the feedback position signal of induction phase shifter ; it adopts dsp ’ s capture cell to accomplish the function of detecting the feedback position signal of photoelectric coder

硬體方面，採用脈沖分配器和單極性電壓驅動技術實現了步進電機的控制和驅動功能;採用脈寬調制技術和cmos互補h橋驅動技術實現了直流伺服電機的控制和驅動功能;採用d / a轉換器實現了交流變頻器的控制功能;採用數字化相位檢測技術實現了感應移相器位置反饋信號的檢測功能;採用dsp的捕獲單元實現了光電編碼器位置反饋信號的檢測功能。

In this system, the closed loop is composed of velocity measurement machine used as velocity feedback and coder used as position feedback, the feed - forward signal of ship swaying is measured by rate gyro

該系統用測速機構成閉環，作速度反饋，編碼器作位置反饋，速率陀螺測量並前饋艦船搖速度信號。

According to the request of this subject, we have developed the system hardware and software for the slave device and the inspection software running on the pc. in this paper all of the followings is illustrated detailedly, such as the research on the principles of measurement and its realization, three means of water - level measurement that are separately based on photo electricity coder, pressure sensor and potentiometer ; selection of the microchip, we choose an advanced integrated soc ( system on chip ) microchip c8051f021 as the main controller ; realization of signal sampling, processing and its conversion in the mcu ; application of high precision 16 bits adc cmos chip - - ad7705 in our system, designing its interface with the microchip and relevant program ; using a trickle charge timekeeping chip ds1302 in the system which can provide time norm and designing of its i / o interface and program ; additionally, a 4 ~ 20ma current output channel to provide system check - up using ad421. in the system, ad421, ad7705 and the microchip compose spi bus ; to communicate with the master pc, here we use two ways which are separately rs232 and rs485 ; moreover, there are alarm unit, keyboard unit, power supply inspection unit and voltage norm providing unit in the system

針對研製任務的要求，課題期間研製了下位機系統硬體和軟體，開發了上位機監控軟體，其中所作的具體工作包括：測量原理的研究和在系統中的實現，在本次設計中用三種方法來進行水位測量，分別是旋轉編碼器法、液位壓力傳感器法和可變電阻器法；主控晶元的選擇，我們選用了高集成度的混合信號系統級晶元c8051f021 ；實現了信號的採集和處理，包括信號的轉換和在單片機內的運算；高集成度16位模數轉換晶元ad7705在系統中的應用，我們完成了它與單片機的介面設計及程序編制任務；精確時鐘晶元ds1302在系統中的應用，在此，我們實現了用單片機的i o口與ds1302的連接和在軟體中對時序的模擬，該晶元的應用給整臺儀器提供了時間基準，方便了儀器的使用；另外，針對研製任務的要求，還給系統加上了一路4 20ma模擬信號電流環的輸出電路來提供系統監測，該部分的實現是通過採用ad421晶元來完成的，本設計中完成了ad421與單片機的spi介面任務，協調了它與ad7705晶元和單片機共同構成的spi總線系統的關系，並完成了程序設計；與上位機的通信介面設計，該部分通過兩種方法實現： rs232通信方式和rs485通信方式；系統設計方面還包括報警電路設計、操作鍵盤設計、電源監控電路設計、電壓基準電路的設計。

The main task including : when the raster ruler and axis - angle coder move forward or backward, they will bring pulse signals which are length signals and angle signals. these signals will be sent to signal processing circuits to be pretreated. then the signals will be sent to direction differentiation circuits to differentiate the directions

主要完成以下任務：把光柵尺和軸角編碼器前進或後退產生的長度信號和角度信號，送信號處理電路進行處理，再送鑒相倍頻電路進行鑒相處理，送單片機計數，由另一片單片機把計數的結果數據經過串列通訊電路送至pc主機去進行處理。

In the designation of software, the author adopts the modular designing method, and makes full use of the functions what the mcu offers, such as a / d function, interrupt function, pwm function, and software timer function. as a result, the following subroutines are programmed : a / d sample, read optic - electron coder signal, disposition of orientation interruption, z interruption, and software timer

在控制軟體的設計上，採用模塊化程序設計方法，充分利用單片機內部提供的a d功能、中斷功能、 pwm功能、軟體定時器等功能，設計出了a d采樣子程序、讀編碼器信號子程序、定位中斷服務子程序、 z中斷服務子程序、軟體定時器中斷服務子程序等模塊化程序。

The third part in this paper gives g. 729 compressing algorithm. the kernel of this paper occurs in the fourth chapter, namely the realization of g. 729 speech signal coder. the last part of this paper draws the conclusion and conceives this task ' s betterments

第三章介紹g . 729的壓縮原理及演算法結構，第四章是本論文的核心， g . 729壓縮演算法在ti的dsp晶元上的實時實現，包括語音壓縮演算法實現流程及在實際工作中的一些心得體會。

The methods of determination bipolar inputting control signal, optic - electron coder feedback signal connecting with mcu, dimension ' s unity of inputting signal between feedback signal, zero position orientation, and logical drive are proposed and realized

提出並實現了系統雙極性輸入控制信號采樣、編碼器反饋信號與單片機介面、輸入信號與反饋信號的量綱統一化、零位定位、以及邏輯驅動等處理方法。

With the outer coder ( reed - solomen coding ), the hdtv receiver chip can attain 14. 9db in signal - to - noise

最後在整個晶元系統達到了14 . 9的噪聲門限。

In the wi coder, the speech signal is represented by an evolving characteristic waveform ( cw ). the cw is decomposed into a slowly evolving waveform ( sew ) and a rapidly evolving waveform ( rew ), representing the quasi - periodic and non - periodic components of speech, respectively

Wi編碼器將語音信號表示為漸變的特徵波形（ cw ? characteristicwaveform ） ，然後將其分解為慢漸變波形（ sew ? slowlyevolvingwaveform ）和快漸變波形（ rew ? rapidlyevolvingwaveform ） ，分別表示語音的準周期成分和類噪聲成分。

This system uses the evm of dual - core tms320vc5471. for the different core configuration, the dsp has a / d and d / a modules to implement speech signal i / o channel, real time implementation of speech coder. meanwhile embedded operation system uclinux is transplanted into it

結合cpu兩個內核不同的體系結構，在dsp內核上連接a / d 、 d / a模塊實現語音信號i / o通道以及實時實現語音編解碼演算法，在arm內核上移植了clinux嵌入式操作系統。

Additionally, the underway researches on producing coder and decoder in a ternary optical computer as well as group - signal converter for realization system of ternary optical fiber communication were introduced in this thesis. some experiments done by others were quoted to prove the ternary optical computer theory

論文還介紹了正在進行三值光計算機編碼器、解碼器的製作研究，和正在進行的三值光纖通信實現系統的信號成組變換器的製作研究，以及可以佐證三值光計算機理論的他人的實驗工作。