檢波變頻器 的英文怎麼說

中文拼音 [jiǎnbiànbīn]
檢波變頻器 英文
detector converter
  • : Ⅰ動詞1 (查) check up; inspect; examine 2 (約束; 檢點) restrain oneself; be careful in one s c...
  • : Ⅰ名詞1 (波浪) wave 2 [物理學] (振動傳播的過程) wave 3 (意外變化) an unexpected turn of even...
  • : Ⅰ形容詞(次數多) frequent Ⅱ副詞(屢次) frequently; repeatedly Ⅲ名詞1 [物理學] (物體每秒鐘振動...
  • : 名詞1. (器具) implement; utensil; ware 2. (器官) organ 3. (度量; 才能) capacity; talent 4. (姓氏) a surname
  1. Chapter 3 discusses the modules used in the fh - mpsk and fh - / 4dqpsk systems. these modules include : duc / ddc ( digital up converter / digital down converter ), nyquist flitter, burst start detection, interpolation module, pll ( phase locked loop ), pll error extraction, initial phase correction and the coding and decoding for tcm

    第三章主要討論了跳模式下fh - mpsk和fh - 4dqpsk系統中各個模塊的設計,這些模塊包括:上下、奈奎斯特濾、信號到達測、插值模塊、通用環路、各環路誤差提取方法、初始相位校正和tcm編譯碼。
  2. The specific research methods are listed : 1. matched filter taking the max ouput snr as the best rule correlates nonstop divided signal and divided echo to detect low snr target signal. then all one dimension divided correlation outs and done fft in portrait to leach interferential signal such as static or low rate mussy meaves, many pathway echo and so on and to take target ' s time difference and doppler frequency that combine parameters that target ' s direction taken from antenna and so on to implement target ' s orientation and tracking

    具體研究方法如下: 1 、採用以輸出信噪比最大為準則的最佳匹配濾來對分段的參考和目標信號作相關處理來測低信噪比目標信號,然後對一維分段相關輸出組作縱向傅立葉換來濾除靜態或低速的雜、多徑回等干擾信號,並提取目標的時差和多普勒率,再結合由天線獲得的目標方向等參數,就可以實現目標的定位和跟蹤。
  3. At present, the typic harmful current detection methods are the fast fourier transform algorithm in frequency domain and methods based on the instantaneous reactive power theory, these methods all require some transform and quick, real - time calculating, so high precision analog multipliers or high speed dsp chip with fast a / d are needed, this results in complex circuit and high cost , which have restricted the development of apf

    目前畸電流測常用的方法有域法的fft和基於瞬時無功理論的畸電流測法。這些方法均有一定的換,需要快速、實時運算,因此必須使用高速的數字微處理和高性能a / d轉換,這必將大大提高系統成本,使得電路結構復雜,在一定程度上限制了有源濾的發展。
  4. Eddy - current sensor conversion circuit consist amplification circuit, band - pass filter circuit, demodulation circuit, differentiation phase and data sampling circuit. these circuits are used to convert the test signal of eddy - current sensor to discrete signal tend to process. the microprocessor system that formed of dsp chip is used to data fitting of test system, data displaying and data communicating with personal computer, etc. the interference questions of hardware design and the measure of eliminating interference signal in the subject are introduced in the last of this chapter

    硬體電路的設計主要分三大部分來實現:激勵源電路部分,由分電路和率合成電路組成,產生率穩定的激勵信號以確保測任務的正常進行;傳感換電路部分,由放大電路、濾電路、電路、鑒相電路和數據採集電路組成,主要將電渦流傳感測線圈測到的信號換成只含有被測信息的離散信號,易於后續電路處理;由dsp晶元構成的微處理系統,主要完成測系統的數據擬合、顯示及與主機通信等功能。
  5. The signal is fed into a filter-amplifier which is transformer-coupled to the video-detector.

    這個信號送到濾-放大,它是由耦合到視的。
  6. A cyclic radial shearing interferometer was used to diagnose the wavefront distortion of a laser system and an lcslm ( liquid crysnd spatial ligh modulator ) was used to control it. some results have been summarized as follows : l. according to the theory of scalar quanity diffeaction and the model of the random gaussian phase screen of low frequency wavefront, the effect of the low frequency wavefront with different rms gradient on the focal spot of a laser beam was studied

    本論文在激光光束前畸測和控制上進行了新的探索,主要就空間相位調制環路徑向剪切干涉儀以及它對前畸測和液晶空間光調制及其對中前畸的控制進行了研究,其研究的內容和取得的成果如下:一、根據標量衍射理論,結合低前畸的高斯隨機位相分佈模型,研究了不同均方根梯度低前對激光光束焦斑聚焦性的影響,並採用描述中前畸的功率譜密度概念,模擬計算了它對激光焦斑旁瓣的貢獻。
  7. This paper describes mainly system functions, measuring methods, circuit design, software program and errors analysis of a new type of measuring instrument. this instrument can measure and monitor electric parameters in single - phase circuits, three - phase ( three - wire or four - wire ) circuits. this system can be applied to electric devices and power plants, transformer substations with harmonic pollution. it can measure current, voltage, power, energy, frequence, power factor etc. it also can detect load quality, phase sequence, alarm, display and print results, as well as detect and dispose negative power

    該儀適用於含有諧污染情況下的機電設備現場、發電廠、供電局、企業電所現場,可用來測量電流、電壓、有功功率、無功功率、視在功率、有功電能、無功電能、視在電能以及率和功率因數等電參數,並具有負載性質(感性、容性)判別,正、逆相序判別指示功能;超限報警功能;列印記錄功能和負功測及處理功能。
  8. There are five parts are as follows : in part one, the concept of switching function is introduced first to establish the nonlinear mathematical model of the induction motor variable frequency speed adjustment system which is fed by a sine pulse width modulated ( spwm ) inverter and takes the effect of the main magnetic circuit saturation into consideration, then the low frequency oscillation of the system is simulated according to the model. next, from the view point of energy conversion of the inverter - induction system, a criterion for the low frequency oscillation is proposed to determine whether the system is in low frequency oscillation which is judged by whether the interval of the negative current component of the inverter input current is more than 1 / fc ( fc is the carrier wave frequency of the inverter ) or not

    首先引入開關函數概念,建立了正弦脈寬調制( spwm )逆供電異步電動機,考慮主磁路飽和時的調速系統整體數學模型,模擬系統的低振蕩;其次從逆-異步電動機系統能量轉換角度出發,提出通過測逆輸入電流中負電流的間隔時間是否大於1 / f _ c ( f _ c為逆率)來判定系統是否出現低振蕩;最後的實驗結果驗證了系統低振蕩建模和判據的實用性和正確性。
  9. The research results are controlled source which has linear or nonlinear variabe frequency scan function and the seismic instruments which match with it, and the method of small group intervals, small offset, much more channels, short array length, high - frequency receivers are applied during the link of data acquisition, and that the techniques of the refraction static correction, the noise suppressing, the high - resolution velocity analysis, the wavelet length compression, the wavelet zero - phase, and the prestack migration should be applied emphasizedly during the link of data processing and interpretation

    研究表明,對于城市活斷層的抗干擾高解析度淺層地震勘探,在數據採集環節應採用具有線性或非線性掃描功能的可控震源和與其相匹配的地震儀,以及小道間距、小偏移距、多接收道、短排列和高接收的工作方法;在數據處理與解釋環節,要重視折射靜校正技術、噪聲壓制技術、高精度速度分析技術、子壓縮技術、子零相位化技術和疊前偏移技術等的應用。
  10. The active power filter can compensate the harmonic of variety in magnitude and frequency. so we adopt active power filter to restrain harmonic of electric arc furnace, and a new method of detection adaptive electric arc furnace is presented, the result of simulation indicate that the method is proper

    而有源濾能對大小和率都化的諧進行實時補償,所以本文研究了將有源濾用於電弧爐系統諧抑制的方法,並提山了一種針對電弧爐系統的諧測方法。
  11. Thus, it is difficult to find the voltage reference for the harmonic analysis. since acem are always operated near to the synchronous speed, the frequency of the excited voltage is very low, even to zero. therefore, this is the power harmonic suppression study of a complicated power supply system, in which the about harmonic general theories and methods are all inapplicable

    現代交流勵磁電機( acem )採用電力電子作為勵磁裝置,其勵磁電壓諧含量豐富,難于獲得諧分析所需的電壓基準,同時交流勵磁電機經常工作在同步轉速附近,致使勵磁電壓率極低甚至為直流,通常的諧測方法和理論都無法適用,因而這是一種目前尚未深入探討過的復雜供用電系統電力諧抑制問題的研究。
  12. Fast segmentation of video objects based on change detection and spatial - temporal filters

    基於測與時空濾的視對象分割方法
  13. Jinque co. has developed neo - generation reliable frame - structure ups, which is high frequency and on - line intelligent and whose height is 19 inchs. the product adopts cpu process, so it has excellent ability to calculating and accurately test every control point to guarantee reliability of quality. at the same time, due to the design of double - change power, the voltage and frequency are stable ; the product deletes all kinds of interrupted frequency and becomes power of sine wave to provide vital equipment with better power environment

    金雀公司根據網路系統的電源要求,開發出新一代高可靠的19英寸機架式高在線智能型gr系列ups ,採用cpu處理,極強的運算能力,精確迅速地測ups各控制點,由於採用雙換電源設計,供負載使用的電源電壓率穩定,濾除雜讀的純凈正弦電源,為重要的設備提供更佳的電源環境。
  14. The receiver unit mainly consisted of the digital down converter, matched filter, integration and dump module, power detector, symbol tracking processor, differential demodulator, parallel - to - serial conversion module, output processor and afc module

    接收部分主要有數字下、數字匹配濾、積分清洗、功率測、符號跟蹤處理、差分解調、並串處理、自動率跟蹤處理等模塊。
  15. The simulation about the harmonic detection of a three - phase cycloconverter - fed a. c. excited generator verified the effectiveness of the method

    針對三相交-交交流勵磁發電系統的諧測進行的模擬研究,驗證了本文方法的有效性。
  16. The control of the spatial mid frequency wavefront distortion was achieved based on our cri wavefront sensing and lctv wavefront correcting system. the results of our research show that crs interferometer can be used to diagnosing the mid and low frequency wavefront distortion of a laser beam and lcslm can be used to availably controlled it

    通過以上研究,說明我們建立的環路徑向剪切干涉儀可以用於icf激光驅動的中低段前畸測,並且液晶空間光調制可用於它的前級中存在的中前畸的校正。
  17. Presents the simple but highly reliable on - line detection of ultrasonic transducer clamping capacitance based on the impedance circuit model constructed through the impedance characteristics of the ultrasonic transducer under triple harmonics, and concludes from experimental results that this method can be used to effectively detect the variation of clamping capacitance while the transducer is operating, and the matching inductance can be dynamically regulated according to the results of detection, and dynamic matching can therefore be achieved in the real sense at the end of the transducer to improve the overall performance of the whole system

    為了解決大功率超聲應用的換能電端匹配問題,分析了超聲換能在諧振率三次諧下的阻抗特性,給出了超聲換能三次諧下的阻抗電路模型.並根據阻抗電路模型建立了對超聲換能的夾持電容實現在線測簡單、可靠性高的方法,實驗證明該方法有效的.該方法可以在換能工作過程中隨時測夾持電容的化,根據測結果對匹配電感進行動態調整,實現真正意義上的換能電端的動態匹配,從而大大改善匹配質量,提高系統的工作性能
  18. Magnetizing inrush current has obvious singularity, and wavelet transform has multi - scale and good time - frequency local characteristic, that it is particularly well adapted to extract the characteristic of signal ' s edge and peak value, and can check up the singularity well

    勵磁涌流具有明顯的奇異性,小換具有多尺度分析和良好時域局部化特性,適合提取信號邊緣和峰值突的特徵,能夠很好的測信號奇異性。
  19. The design of software is composed of the development of virtual panel interface and the research of algorithm of measuring electric variable. the most popular vc + + 6. 0 is used here to complete the development of the former which concludes the dynamic display of input wave - form, real - time displaying rms, power and power factor, harmonic analysis and measuring the voltage fluctuation and flicker

    其中,虛擬儀面板界面的開發在目前最流行的可視化編輯工具visualc + + 6 . 0 ( mfc )下實現,完成了輸入電壓、電流形的動態顯示,率、有效值、功率以及功率因數的實時顯示,諧分析以及電壓動和閃測。
  20. The apfs using according detection method are investigated and developed by simulating and experimenting to demonstrate the performance of the proposed detection method and apf. secondly, a nonlinear, large signal control theory - one cycle control, which was presented in the 90 ' s and suitable especially for switch power converter , was investigated. the integration reset control and extension applications , which was < wp = 7 > developed based on one cycle control theory, was emphatically studied

    本文深入分析了90年代初發展起來的一種適合開關的大信號非線性控制理論? ?單周控制( onecyclecontrol )理論,以及在此理論基礎上發展起來的常積分復位控制技術和它的最新應用,首次成功地將單周控制理論應用於apf的測和控制中,提出並實現了一種通用常積分復位控制有源電力濾,從而簡化了apf的工作原理和結構。
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