驗頻器 的英文怎麼說

中文拼音 [yànbīn]
驗頻器 英文
frequency monitor
  • : 動詞1. (察看; 查考) examine; check; test 2. (產生預期的效果) prove effective; produce the expected result
  • : 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. The author explains the selection of frequency converter, motor and their ancillaries, as well as related verifying formulae in the scheme

    對方案中如變、電動機極其輔件的選用以及有關算公式做了說明。
  2. Abstract : to obtain the high frequency ( hf ) array signals, an applied circuit called hf array signals generator is designed using dsp and duc ( digital up converter ). the generator simulates the generation of output signals of 9 - element arrays with different array format, different direction of arrival ( doa ) and existing cochannel signals respectively

    為了在實室中獲得短波天線陣列信號,應用dsp晶元和duc晶元(數字上變)設計了一個實用電路短波陣列信號發生,模擬實現了短波九元天線陣的多種陣型、不同來波方向及存在同多信號時的陣列輸出信號。
  3. 0. 203mm using 0. 008 - in. 0. 203 - mm aperture reflectometers as test instruments for measuring visual image quality of business copy images

    作為測量商業拷貝影像視成像質量檢使用的0 . 008 - in ,
  4. The design process consisted of computer design by circuit simulation software integrate with electromagnetic simulation software, fabrication of microstrip bpf 、 lpf 、 the match circuits, cavity and test. when rf frequency is 91 ~ 97ghz, lo frequency is 47ghz, power is 10 dbm. the best conversion loss of the 2 and 4 sub - harmonic mixer is 13. 5 db and 23. 5db which is shown in the test

    實測表明,在本振為47ghz ,功率10dbm ,測試射帶寬為91ghz 97ghz時,二次與四次分諧波混損耗最優處分別為12 . 7db和23db 。最後對實結果進行分析並提出改進措施。
  5. Secondly, the mmic 20 - 40ghz hmmc - 5040 amplifier is used to realize the phemt frequency converter. the feasibility of up / down converter using phemt sub - harmonic mixing is validated by the experimental results. at last, on the base of phemt multiplying, amplifying and gate mixing, the

    之後研究了採用hp公司的20 - 40ghz放大晶元( hmmc - 5040 )設計製作phemt ( pseudomorphichighmobiletransistor )變,通過測試,給出了實結果,並通過實證了採用phemt二次諧波混模式,實現上下混的可行性。
  6. This paper studies the variable - voltage energy saving theory and its implementation for asynchronous motor with light load, compares several kinds of scheme of improving efficiency in detail and confirms the variable - voltage energy saving method, that is adjusting the input voltage by detecting the iron loss and copper loss of motor directly. in addition, the directness *, simpleness and availability of the method are verified by the emulational experimental results with simulink of the matlab. the circuit of the general inverter based on the tms320f240 dsp was used in this paper, and the practicable program was compiled

    本文分析了異步電動機輕載時降壓節能運行的原理,對幾種提高效率的方案進行了比較,確定了通過直接檢測電動機鐵損和銅損來實時調節輸入電壓以達到高效節能目的的控制方法,應用matlab軟體對系統進行模擬,在基於tms320f240dsp的通用型變上編制了實用化的程序,形成了完整的樣機,對其進行了測試,並給出了試結果。
  7. Application of frequency - converter on water flow standard facility

    在水流量標準試裝置的應用
  8. Bearings roller bearings and other components. bearing ring precision rolling production line ; a high - precision, super efficient grinding automatic production line ; bearing assembly line ; signal processing equipment ; blank processing equipment ; crowning roller grinder ; end - grinder ; coordinate precision grinder ;, cylindrical grinder ; surface grinder ; spherical roller processing equipment ; raceway grinder ; heat treatment ; needle processing equipment ; polishing processing equipment ; roller - seiki ; rolling auto - sorting machine parts bearing hardness sorting machine bearing cleaning equipment ; contact angle measuring instrument ; contour meter ; bearing life experimental device ; bearing packaging equipment ; roundness instrument ; dynamic vibration noise analyzer ; noise vibration test equipment ; printing machine measuring instrument ; roughness tester ; scanning electron microscope ; finish detector ; inverter ; spindle, wheel, whetstone and other grinding materials

    軸承套圈精密輾擴生產線高精高效磨超自動生產線軸承自動裝配線球加工設備毛坯加工設備凸度滾子磨床雙端面磨床高精度坐標磨床內外圓磨床平面磨床球面滾子加工設備溝道磨床熱處理生產滾針加工設備光飾加工設備滾道超精機滾動體自動分選機軸承零件硬度選別機軸承清洗設備角接觸測量儀輪廓測量儀軸承壽命實裝置軸承包裝設備圓度儀振動噪音動態分析儀振動噪音測試裝置印字機加工測量儀粗糙度測試儀掃描電子顯微鏡光潔度檢測儀變電主軸砂輪油石和其他研磨材料
  9. One is situated in the place with frequent earthquakes occurrence, the other is in the place with no earthquakes

    地震發地區的試場,用於證觀測項目效果;無震地區試場,用於試的抗干擾性能和確定背景場。
  10. Whole scheme of frame design of test - bed is proposed as : the host fanner supply the firebox the once and twice air required by diesel oil ' s burning and the cooling air ; the export parameter of the test - bed is varied by the adjust of the flux of air and diesel oil. and the air flux is varied by adjusting the rev of the fanner adjusted by transducer and the corner of the fan inlet adjusted by step motor. the quantity of oil is varied by adjusting the oil valve adjusted by step motor ; the measurement of the air flux in the test - bed adopts the method of fanner dynamics performance test in the nation criterion

    確立了實臺結構設計方案:主風機為燃燒提供燃燒所需的一次、二次進風量及冷卻風量;利用變調節主風機轉速、用步進電機調節風門開度來調節風量,用步進電機調節回油閥開度來調節供油量,從而實現對模擬實臺出口煙氣熱流量的調節;實臺的流量測量採用風機動力性能測試標準中測流量方法等。
  11. The background of this dissertation is based on a project of researching and developing a high voltage series h - bridge multilevel converter, which drives an induction motor of 6300v, 2240kw for driving a water flooding pump in taigang. the research work on high voltage high power series h - bridge multilevel converter has been carried out by theory analysis, computer simulation and experiments

    本文以太鋼某廠額定功率2240kw ,額定電壓6300v注水泵電機變調速科研工程為背景,從理論分析、計算機模擬和裝置實幾方面入手,對高電壓大容量串聯h橋多電平變的理論和工程應用技術進行較深入研究。
  12. Secondly, to achieve the independent regulation of active and reactive power output from the generator side which is designed for the purpose of tracing the maximum wind - energy capturing. the paper has analyzed the mathematic model of the ac excited doubly - fed machine and the stator field orientation control strategy of the motor as vscf wind power generator. thirdly, it has put forward and designed the dual pwm converter with the capacity of energy flowing bidirectional aimed at the demand of rotor energy bidirectional flow. the author constructed reliable and integrated experimental system and did a series of experimental study including no - load, cutting - in network and power generation at, below and above the synchronous speed

    論文首先分析了風機運行特性及其最佳風能利用原理,通過模擬及實證了採用直流電機的輸出特性模擬風力機的最大輸出功率曲線的可行性,並給出了模擬系統的硬體結構;然後為了實現交流勵磁發電機有功、無功功率獨立調節機理,分析了交流勵磁雙饋發電機的數學模型和在追蹤最大風能捕獲變速恆風力發電時必需的定子磁鏈定向矢量控制策略;針對雙饋發電機轉子能量雙向流動的要求,提出並設計了具有能量雙向流動能力的雙pwm交流勵磁用變;最後為實現從理論到實踐的全面研究,研製出了一套小功率完整的雙pwm變交流勵磁的雙饋風力發電機實系統,進行了空載、並網、同步速及上、下的發電運行等一系列的運行實;所完成的模擬和實研究均證了理論、模型和控制策略的正確性、可行性。
  13. Finally, the above - mentioned two soft - switching inverter prototypes are made and tested, and the experimental results show the feasibility of circuit topologies, the correctness of theoretical analysis, and the rationality of parameter design. and that, these two circuits can realize the aim of soft - switching, reduce the circuit losses and increase the system efficiency

    最後形成了上述兩個軟開關變樣機並對其進行了實,實結果證明了電路拓撲的可行性、理論分析的正確性以及參數設計的合理性,且這兩個電路均能較好地實現軟開關,減少了電路損耗,提高了系統的效率。
  14. The basic characteristics, framework, principles of dominant parts and application of those are studied and illustrated. at the last chapter, by devising a short - wave radio station aforementioned fundamental theories are put into practice especially digital modulation, demodulation, ddc and dug etc. the implement framework and design method of sdr are discussed by data transmission of voice including dug modulation in transmit module and ddc demodulation in receive module. moreover, satisfied results are obtained by validation on the sb3410 platform in bluewave system

    針對論文設計中用到的兩個比較重要的件hsp50214b下變和hsp50215上變,作了較為深入的研究並給出了詳細的描述,包括基本特徵、框架結構、各主要部分原理及在設計中的應用;在最後一章,通過設計一個短波無線電臺,將前面的基礎理論尤其是數字調制、解調及數字上、下變等應用於實踐中,通過實例討論話音數據傳輸的軟體無線電實現結構及設計方法,包括發射模塊中的上變調制和接收模塊中下變解調等,並在bluewave系統的sb3410平臺上運行證,取得了較為滿意的結果。
  15. It also gives the motive of the ka - band vco and mixer, associated with the subject ' s requirement and the realistic conditions, according to which a proposal is confirmed that the gunn diode and the varactor are mounted in the same cavity to fulfill the vco and an antiparallel diode pair is used to fulfill the harmonic mixer. in chapter 2, based on the basic theory of negative resistance oscillating, we analyses the gunn oscillator and it ’ s tuning character. chapter 3 introduces the theory of millimeter - wave harmonic mixer

    以此為根據結合課題需要和實室的實際條件,確定vco採用耿氏管腔體振蕩形式,變容管與耿氏管安裝在同一個腔內以進一步減小體積,採用反向並聯二極體實現諧波混;第二章介紹負阻振蕩理論及其調諧原理;第三章介紹毫米波諧波混基本原理;第四章給出了振蕩及諧波混的設計過程,整個組件聯調的結果;最後是結束語,分析了電路中存在的問題,指出了改進方向。
  16. Ltd founded in 1999, is a new high technology enterprise, specialized in researching, developing, manufacturing and selling of elevator weight - load system, elvator ic intelligent management system and the like of elevator dynamic static state data record management system and the like of elevator fittings. there are more than 100 experienced staff members including r d perpons, engineers and adminstrators who do their utmost to offer prompt, efficientand overall services for customers. our company manufactures six kinds of productions that hold autonomous. our company manufactures six kinds of production that hold autonomous intellectual property rights and has established long - term friendly cooperation with over one hundred ecactly elevator manufacturtures in china and abroad

    秦皇島開發區前景光電技術有限公司成立於一九九九年,是一家專業從事研製開發銷售電梯重量載荷控制系統電梯ic卡智能管理系統電梯遠程自動報警安防管理系統和永磁同步電梯專用變等電梯配件產品的高新技術企業。我公司擁有經豐富的科研工程技術管理人員一百余名,竭力為客戶提供迅速優質全面的服務。公司生產擁有自主知識產權的九項專利產品,並與百余家整梯生產企業建立了長期的友好合作關系。
  17. System is coordinated controlled based on serial communication between the computer and plc. the followed variables are controlled : the rotational speed of the seeding device driven draft, the operation of the converter, stability and speed of the convey belt, and inclination of the test platform, which is done to simulate actual working condition of seeder

    設計了基於串列通訊的微機與plc集成控制方案,控制內容包括:排種驅動軸轉速控制、變的控制、傳送帶的穩定性及速度控制、工況模擬過程中的試平臺傾斜位置的自動控制等。
  18. In the end, the experiment on a single - phase motor with symmetrical windings is made by the inverter. experimental results verify the feasibility of the voltage - vector pwm method of variable frequency control for single - phase motor

    最後,利用製作的單相變對繞組對稱的單相電機進行了變調速實,實結果證了單相電動機電壓矢量式pwm變調速控制方法的可行性。
  19. 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-交變交流勵磁發電系統的諧波檢測進行的模擬研究,證了本文方法的有效性。
  20. In this chapter, the suitable devices and circuit structure have been choosed to design a second order multiplier, a fifth order multiplier, a sixth order harmonics mixer and a dro operating in 9. 4ghz. the forth chapter is a section of system realization and test, in this chapter, the system of low phase noise frequency source has been constructed and tested. the results show that the targets of the system have been achieved

    第三章的系統分件與實數據部分,主要是以上述第二章的分析為基礎,以所推導的理論公式為指導選取必要的件和合適的電路拓撲結構,分別設計實現了一個二次倍,五次倍, 6次諧波混和一個9 . 4ghz的介質振蕩,為後述整個系統的實現在硬體上做了必要的準備。
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