頻率信號 的英文怎麼說
中文拼音 [bīnlǜxìnháo]
頻率信號
英文
frequency signal-
Mems ( micro electromechanical system ) has become one of the most rapidly development technologies. along with the rapid development of mems techniques, capacitive sensor is used widely whose capacitance changes small, which has put forward the new request to the measurement technique. the common measure for capacitance measurement is that convert capacitance to voltage, electric current or frequency. the area of polar plate of the capacitor becomes smaller and smaller, and the total capacitance of micro capacitive sensor is usually several pico farad only. as a result, its change amount is smaller
Mems （ microelectromechanicalsystem ）近年來發展最快的技術之一，隨著mems技術的快速發展，電容式加速度計的電容變化變化量越來越小，對檢測技術提出了新的要求。在電容式傳感器中，常用電容檢測電路是將其轉換為電壓、電流或者頻率信號。目前的微型電容傳感器的極板面積變得越來越小，電容總量只有幾個pf ，變化量就更小。The brief name ring, measures a device right high, inside, low and each segment scope for ability for even emersion of signal, pointing lowestly validity returning putting the frequency with tallestly validity returning put of the frequencying. request towards device rang contain both side, on is a scoping as far as possible breadth, can be namely frequency bottom that replay the is as far as possible low, and the upper limit is as far as possible high ; two is a frequency scope the inside is at all point to respond to as far as possible flat, avoided to appeared the big motion
簡稱頻響，衡量一件器材對高中低各頻段信號均勻再現的能力，指最低有效回放頻率與最高有效回放頻率之間的范圍。對器材頻響的要求有兩方面，一是范圍盡量寬，即能夠重播的頻率下限盡量低，上限盡量高二是頻率范圍內各點的響應盡量平坦，避免出現過大的波動。At89c52 receives the frequency signal from the syntony circurt and processes it, then according to design request, sends out all kinds of controlling signal. in allusion to this signal processing circurt, we have designed corresponding software for at89c52
At89c52接收來自諧振電路的頻率信號，並對其進行處理，再按照設計要求發出各種控制信號。針對此信號處理電路，為at89c52設計了相應的軟體。Venation wave spectrum analysis finds out shape - structure change of mid - frequency signal fluctuation
脈絡波譜圖分析查明了中范圍（頻率）信號波動的形態結構變化。The conventional sphere model of earth and circle model of orbit are discarded, and the ellipsoid model and the ellipse model are selected for further research, which achieves a method to determine the target position through the antenna pointing direction. and the spaceborne sar system design and simulation software is brought forth. this software accomplishes sar system coefficients design for antenna area, pulse repetition frequency, signal bandwidth, downlink data rate, radar transmitter power and satellite platform yaw steering
本文從星載雷達的星地幾何關系入手，舍棄傳統星載合成孔徑雷達研究中的球地球模型和圓軌道模型，研究了在地球橢球模型和橢圓軌道模型下由雷達天線確定目標坐標的方法，並在此基礎上研製了星載合成孔徑雷達系統設計與模擬軟體，完成雷達系統天線尺寸、脈沖重復頻率、信號帶寬、雷達信號數據率、雷達發射功率、衛星平臺的偏航牽引等幾個方面的系統參數設計以及雷達多普勒特性、雷達系統模糊、雷達定位及精度的分析，最後完成雷達回波信號的模擬。Later on we discuss the basic theory of multi - rate signal processing, and the polyphase algorithm for interplation filter, then produce the efficient algorithms for interplation : half - band filter and cic filter. we analyze their computing quantity and performance, especially the mirror elimination feature and the at - tenuation in the passband
之後討論了多速率信號處理的基本理論，比較了不同的內插演算法，分析了半帶濾波器和cic內插濾波器的計算代價、時頻性能，以及各自的抑制鏡像特性。This paper presents a method of improving on frame & horizontal synchronization in laser phototypesetter, by using singal - chip computer system to detect real - time frequency deviation and adjust film transmission speed
摘要提出了一種在激光照排機電控系統中，利用單晶片微機對轉鏡掃描光柵頻率信號的暫態波動量進行檢測、提取，並以此實時校正系統輸片速度，實現場掃描對行掃描的跟蹤、補償，從而提高行、場掃描同步精度的方案。In this method, the phase difference between two compared signals that have same nominal frequency can be converted into voltage signal by phase detector. the voltage signal varies linearly with the phase difference and can be displayed or recorded by some instruments
此方法是將兩個被比對的標稱值相同的標準頻率信號之間的相位關系，通過線性鑒相器轉換成與它成線性關系的電壓信號，並通過相應的設備進行顯示紀錄。According to development of inland and abroad, a new measurement method has been put forward that make use of the periodic characteristic of the phase difference between two arbitrary frequency signals. in the light of lissajous graph, we complete comparison of radio frequency and microwave with 105 rates relationship in technique. on the ground of common characteristic of frequency signals, this method can be developed to comparison of microwave frequency and optical frequency to accomplish optical frequency measurement
根據國內外的情況，提出一種新的測量方法：即利用任意頻率信號之間都存在著相互相位差周期性變化的現象，根據李沙育圖形的原理，在技術上完成了射頻到微波信號之間成10 ~ 5頻率關系的比對，再根據頻率信號的共性，將此方法推廣到微波到光頻信號之間的比對，以完成對光頻的測量。Transmiting beamforming of stepped frequency signals for the uniform circular array
基於均勻圓陣的步進頻率信號發射波束形成1. stepped - frequency signals are used in echo simulation. it could generate synthetic high resolution image
1 、用步進頻率信號完成回波模擬，研究了這種信號的特點。These requirements are too hard to reached by using normal analog circuit. frequency synthesizer is the key technology to produce a great deal of frequency signal
這些技術要求用普通的模擬電路技術是達不到的，頻率合成技術是產生大量高精度頻率信號的主要技術。Often, this is used to make appliances appear to " talk " or wall outlets appear to be " sending radio frequency signals ", or strong radio interference will be found to emanate from a point in mid air
這常常使設備好像是在「談話」 ，或墻縫處好像在「傳送無線電頻率信號」 ，或強大的無線電干擾會被發現彷彿是來自於空中任何一處。The experiment result indicates that the circuit system has achieved the expected design goals. furthermore the circuit system is valuable for designing the data acquisition and control system for any frequency modulation sensor
經實驗驗證，所設計的電路系統不僅能達到預期的設計目標，此外其設計思想對任何只要輸出是頻率信號的傳感器的使用都具有積極的參考價值。It is very difficult to design a high - quality underwater acoustic data transmission system. in our study, we use frequency diversity and frequency - hopped technology. this method is an effective solution for the isi and signal fading
該方法起到保證mfsk傳輸系統使用頻率中文摘要統使雨頻率分集技術能得以有效的實現；並可用於提高mfsk信號檢測精度，因此在頻率信號檢測中它有廣泛應用意義，它是本文重要創新之處。The displayer based on pic16f877 mcu, expanded the can communication circuit, the keyboard and the led. in the part of the software design, the intensity signal processing algorithm, the frequency signal processing algorithm and the keyboard program are conducted
在二次儀表硬體電路設計中，詳細介紹了輸入電流電壓轉換電路、強度信號處理電路、頻率信號處理電路以及電源電路，數字電路部分以pic16f877為核心，擴展了can通訊介面，鍵盤及顯示部分。Firstly, the multiple modes and dispersion nature of ultrasonic lamb wave are investigated in theory. furthermore, optimization of excitation signal is performed experimentally with the four parameters : the transport mode, the center frequency, the amplitude and the number of the wave ’ s peak value
本文首先從理論上分析lamb波的多模式和頻散現象，在理論基礎上結合實驗在傳播模式、中心頻率、信號幅值、波峰數等幾個方面對lamb波進行優化。The main results of this paper are as fellows f 1 ) illtroducing the ultrasonic technology to the rigid measurement, successful1y exploits the practical small intellectualized ultrasonic device of measuring rigidity by applying mechanical technology, electronic technology and computer science 2 ) reading clearcf displaying more various, applying more information, being easiest to accept by user because of adopting liquid crystal display ( lcd ) 3 ) theorizing the mathematical model between the signal of frequency and the rigid value on the device, possessing very importan practical significance 4 ) optimizing the every parts of the device, achieving the goals of lower wastage of energy, smaller, lighter and inexpensive 5 ) taking the measure to reduce the wastage of energy and adopting reasonable management in power supply for the device, making the device skimp more energy, prolonging the life - span of battery 6 ) utilizing the interface of rs - 232, discussing the communication between the ultrasonic device of measuring rigidity and computef, and also forecasting the foreground of advanced exploitation by user
本文工作的主要成果是： 1 ）將超聲波技術引入零件表面硬度的檢測當中。應用機、電、計算機技術，研製成功較為實用的小型智能超聲波硬度檢測儀2 ）採用lcd （ liquidcrystaldisplay ）液晶顯示，使讀數更清晰、顯示多樣化、信息量多、易於為用戶接受3 ）在理論上建立了該系統的頻率信號與硬度值的數學模型，具有非常重要的實踐意義4 ）對各元器件進行優選，達到低能耗、體積小、重量輕、價格便宜等目的5 ）採取措施降低整個系統的能耗並對系統的供電進行了合理的管理，使其進一步達到低能耗，延長了電池的使用壽命。 6 ）利用rs - 232標準介面，討論了該超聲波智能硬度測量儀與系統機進行通訊以及用戶進行二次開發的前景It involves not only the detection of signal frequency, signal phase and power factor but also calculation and control of phase. the method of calculating phase is based on fast fourier transform algorithm ( fft ). it is used to calculate signal frequency, signal phase, power factor and the phase on / off time according to sampling instantaneous value of voltage and current
本文主要提出了採用信號處理技術（快速傅里葉變換fft ） ，根據電壓、電流采樣的瞬時值，計算信號頻率、信號相位、功率因數、分合閘相角的選相控制方法，並介紹了最終控制分合閘的原理與實現方法A field information acquisition platform was designed using network distribution structure and module design method. the signals were divided into analogue signals, digital signals and frequency signals ; the same signals were acquired through the same module, so the platform has good universality and extensibility
設計了農田信息數據採集平臺，採用網路分散式結構及模塊化設計思想，將採集的信號分為模擬信號、數字信號和頻率信號，並設計統一的模塊加以採集，平臺具有很好的通用性和可擴展性。分享友人