晶體接收機 的英文怎麼說

中文拼音 [jīngtǐjiēshōujī]
晶體接收機 英文
crystal radio
  • 晶 : Ⅰ形容詞（光亮） brilliant; glittering Ⅱ名詞1. （水晶） quartz; （rock） crystal 2. （晶體） any crystalline substance
  • 體 : 體構詞成分。
  • 接 : Ⅰ動詞1 （靠近;接觸） come into contact with; come close to 2 （連接; 使連接） connect; join; put ...
  • 收 : Ⅰ動詞1 （把攤開的或分散的事物聚集、合攏） put away; take in 2 （收取） collect 3 （收割） harvest...
  • 機 : machineengine
  • 晶體 : [晶體學] crystal; vitrella; crystal body; crystalloid; x-tal
  • 接收機 : receiver; radio set; receiving set; receiving machine接收機保護設備 reprod; 接收機保護裝置 receiver protector
  • 接收 : 1 （收受） receive; reception; accept; [電學] receipt; receiving 2 （接管） take over; expropriat...
  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. This paper mainly focuses on the noise limiting by means of the direct sequence spread spectrum ( dsss ) and the analysis of the transmission performance of the plc and some digital modulation technology. the contents of the paper is as follows : 1 ) the technical feasibility is proved after simulating noise limiting principle of dsss by means of systemview, the simulation software ; 2 ) a kind of band pass filter ( bpf ) is realized according to the requirement of filter and the principle of butterworth approximation, which satisfies the index of performance of dsss. 3 ) the low voltage plc system includes the sc1128, the specific modulation / demodulation ic, the bpf filter and other circuit components, furthermore, the control function of system is realized by means of the personal computer and the microcontroller

    本課題在對低壓電力線的傳輸特性和數字調制技術進行分析的基礎上，將通信理論中的直接序列擴頻技術（ dsss ）用於解決低壓電力線通信的干擾問題，主要研究內容如下： （ 1 ）用通信模擬軟體systemview對dsss技術的通信和抗干擾原理進行模擬分析，分別對時域和頻域下採用dsss技術前後接收信號的頻譜進行分析，驗證dsss技術在本系統中的可行性； （ 2 ）由dsss技術對濾波系統的要求，根據濾波理論分析了巴特沃思型濾波器的逼近原理並設計了合適的濾波電路； （ 3 ）用調制解調晶元sc1128和自行設計的濾波器加之輔助外圍電路，構造出低壓電力線載波通信系統，並採用atmel公司的單片機設計了接收和發射電路的微控制器； （ 4 ）分別對採取抗干擾措施前後輸入和輸出信號進行對比實驗，並對結果進行分析，驗證了dsss技術對干擾信號的抑制作用。
  3. Gps is a planet wireless conductance system which is global and all - weather, gps can offer high precision time orientation information to infinite user, clock precision reachs 10 ? 6 magnitude 。 not only changes traditional time method of quartz crystal clock, but also replaces wireless shortwave and even more lowfrequency signal and tv signal whose overlay range is limited and low precision, offers advantage to geology field task, achieve automatization and high precision of seismic flow observation

    利用gps授時信號全方位、全天候、連續性、實時性和高精度的特點，以gps信號為基準來校準本地時鐘（晶體振蕩時鐘或原子鐘） ，將gps接收機輸出信號的長期穩定度和恆溫晶振的短期穩定度相結合，應用大規模可編程邏輯器件，設計和實現了由pc104控制的實時在線授時系統。
  4. The precise clock source is crystal oscillator made of 74hc04 ; the mute circuit can conceal the error and solve the problem of noise ; the antenna switching circuit in the receiver is to select one antenna from two which receives signal better. it can improve the quality of the receiving audio signal, restrain the noise effectively and promote the system performance

    高精度的時鐘源是由74hc04構成的晶體振蕩器;靜音電路將出錯的音頻信號進行差錯掩蓋，很好地解決了噪聲問題;接收機採用兩副天線切換工作，提高了音頻信號接收質量，有效地抑制干擾，提升了系統的性能。
  5. The asic chip embedded with bluetooth is usually employed as keyboard mouse equipment controller at present, so that is complicated and expensive to realize. noteworthily a new style of design is developed in the article : a 51 mcu is employed as keyboard mouse equipment controller while controlling bluetooth module as host, which give full play to 51 mcu and make the product at low cost, the design has sure practicability and innovative ; the software of pc end is designed as operating in the backstage, which receives data from usb interface to simulate the function of the keyboard and mouse. the design is easy, the thought is ingenious

    由於目前常見的藍牙鍵盤鼠標設備控制器都是用嵌入藍牙核的asic晶元實現，所以實現復雜而且價格昂貴，而文中設計獨辟蹊徑：用一片51單片機作鍵盤和鼠標的微控制器，兼作控制藍牙模塊的主機，充分發揮了51單片機的性能，實現了低成本設計，具有一定實用性和創新性； pc機端軟體則設計為運行在後臺的應用程序，接收usb介面數據並進行處理，以模擬鍵盤鼠標功能，這一設計簡單易行，思路巧妙。
  6. This paper gives a time - synchronization technique bases on gps time service signal which is used in broad band seismic recorder 。 by world coordination time offered by gps - - utc ( usno ), adjust local clock base on gps signal, gain high nicety clock signal, clock precision reachs 10 - 6 。 this clock is the time source of broad band seismic recorder, bring the whole seismic recorder works in same time base. 1pps time base with high stability can be used as in - phase, spring, time and start - stop of every collection mode, while the scale under second make a precise time mark to receive data of broad band seismic recorder

    針對接收機中gps信號的噪聲進行kalman濾波軟體處理， kalman濾波可以對gps信號與本地晶振時鐘的時差數據在大噪聲中進行平滑，在較短時間內估計出高精度的時差數據。系統消除了gps秒脈沖信號的ms級隨機誤差，把晶振秒脈沖的長期穩定度鎖定到gps信號的穩定度上;在gps信號失效時給出了可行措施，能夠保證在任何情況下產生一個穩定、高精度秒脈沖信號，誤差在1 s內。
  7. The focus is about the char device driver design used in the dvb receiving card and the drive development process in user space ; analyzing the dvb receiving system working principle and process under linux and providing a method to load the linux dvb receive card device drive into the linux kernel ; analyzing and implementing the firmware design of saa7146 chipset working with linux kernel and working characteristic in vrious working mode ; analyzing and implementing the frontend drive programing of the digital tv receive system ; realized the qam demodulation and the mpeg stream filter, so that the output stream can be used to playing on pc better. and this article designs an event management mechanism based on the mhp, which improve the linux dvb software system

    重點研究了數字電視接收卡的字元設備驅動問題，闡述了用戶空間開發驅動程序的過程;分析了linux下數字電視接收系統的工作原理和驅動程序開發過程，給出了linuxdvbapi接收卡設備驅動程序加載到linux內核中的方法;研究實現了saa7146晶元配合linux內核共同工作的固件設計和不同工作模式下的工作特性;研究實現了dvb接收系統中前端驅動程序的編寫;設計實現了qam解調和mpeg流解復用，使輸出傳輸流較好地用於pc播放;同時，本文所設計的一種符合mhp規范的中間件事件管理機制，優化了linuxdvb軟體系統。
  8. The author designs the commonly used hardware platform of if digital receiver in software radio, and companying with the schematic circuit plot analyses the working principle of hardware system, moreover, explains the properties and usages of some important digital processors

    作者設計了軟體無線電中頻數字化接收機通用硬體平臺，結合原理圖對硬體工作的機理進行了全面的分析，並對一些重要的數字晶元的特性和使用作了說明。
  9. In the design of hardware, frequency sweep signal is based on dds + pll. by the control the singlechip c8051f060, ad9852, the dds chip, can achieve stepped frequency signal. with amplifying and detector circuits, the instrument can achieve the measurement and receiving of amplitude frequency characteristic result. by means of pdiusbd12 finish the usb1. 1 protocol conversion, communicate with usb interface of pc, the instrument give the measurement resul of amplitude - frequency characteristic in lcd of pc

    硬體方面，掃頻信號源基於dds + pll的技術，由c8051f060單片機控制dds晶元ad9852實現頻率步進。再加上外圍放大、檢波等電路，測量和接收幅頻特性。並藉助于pdiusbd12完成測量數據usb1 . 1協議轉換，實現與pc機的usb介面通信，將幅頻特性測量結果在pc機的液晶顯示屏上表達出來。
  10. Implemented in the present deep sub - micron ms / rf ( mixed signal, radio frequency ) cmos, this monolithically oeic takes advantage of several new features to improve the performance of the photo - diode and eventually the whole oeic

    這種單片集成接收機採用了先進的深亞微米ms / rf （混合信號射頻） cmos工藝，利用這種新型工藝提供的新技術對原有光電二極體進行了改進，使其部分性能顯著改善，並對整個光電集成晶元性能的提高有所幫助。
  11. The radar medium frequency receiver employ digital signal process algorithm, makes use of flexible digital chips, such as cpld, fpga & special dsp. it take on the advantage of small cubage, low weight, cheapness, simple configuration, modularization. and it takes on the all advantage of digitalization

    雷達中頻數字接收機採用數字信號處理演算法，使用易於實現演算法的fpga 、 cpld或專用的dsp晶元，體積小，重量輕，造價低，結構簡單，易模塊化，系統配置更新快，維護升級方便，具有數字化的優點。
  12. Finally, the paper analyses and discusses the collectivity design, the optics system design ( dispersion system, imaging system and the recording system ) and the typical mechanism design. then, it presents the total assemble graph of the spectrometer and the projects for aiming and alignment of tcecs. especially, twin channels are utilized

    最後，論文從雙通道橢圓彎晶譜儀的總體設計、光學系統（包括色散系統、成像系統、接收記錄系統）的設計和典型機械結構的設計等方面對整個譜儀的結構設計都加以了分析和討論，並給出了整個譜儀的總體裝配圖和瞄準對中方案。
  13. By the late 1950s, for instance, the holdover designs of vacuum - tube tv sets forced new transistor - based models to receive only vhf signals until engineers could revamp the sets some years afterward

    舉例來說，由於1950年代末，真空管電視機的設計過于老舊，新的電晶體機種被迫只能接收vhf信號，過了好多年，工程師才得以大幅修改電視機。
  14. Specifically, the development of high speed a / d converter, dds technology, as well as the prevalence high speed dsp, fpga have provided a solid hardware function for the radar receiver

    特別是高速多位（ 100mhz ， 12bit以上） a / d轉換器和dds技術的發展以及高速數字信號處理晶元（ dsp ）和fpga的普遍使用，為雷達接收機提供了良好的硬體基礎。
  15. Featured with small - scale, light - weight, easy - implemented, stably - performed, the digital receiver designed with fpga and dsp has gradually replaced the traditional analogue one

    由於使用fpga 、 dsp晶元設計的數字接收機具有體積小，重量輕，易於實現演算法，性能穩定等優點，傳統的模擬接收機已經逐漸被數字接收機代替。
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