空中磁測 的英文怎麼說
中文拼音 [kōngzhōngcícè]
空中磁測
英文
air borne magnetometer-
The nuclear-magnetic-resonance magnetometer first went into service in airborne prospecting during the middle 1950s.
核磁共振磁力儀第一次進入航空勘測是在五十年代中期。In order to utilize the magnetic anomaly information obtained by high - precision aeromagnetic survey more effectively, this paper, based on the reliable proof of the existence of weak magnetic anomalies in middle and high mountain areas and combined with characteristics of middle and high mountain areas, has advanced an improved nonlinear filtering method and described its effect in practical application
為了更有效地利用高精度航空磁法測量得到的磁異常信息,在充分論證中高山區弱磁異常存在的可靠性基礎上,結合中高山地區特點,提出了改進的非線性濾波方法,並給出其實際應用效果。Smoke and other environmental contaminants in the sample do not affect detection, because the microbeads are pulled into the clean stream before the fluorescence - detection step
空氣樣本中的煙塵與其他無害有機體,不會影響到偵測,因為微磁珠是在螢光偵測步驟前,就已經被吸入乾凈的溶液之中了。Magswitch is suitable for many liquid and gaseous media, and is used in vacuum technology pump actuation, refrigeration technology compressor control, gas technology supply monitoring, leak detection, filter monitoring soiling detection, filling level measurement overfilling protection, dry running protection and for many different measuring tasks in hydraulic and pneumatic systems, in mechanical engineering and in building service engineering
磁控開關適應多種液體和氣體,並應用於真空技術泵啟動,冷藏技術壓縮機控制,瓦斯技術供給控制,密閉性檢查,過濾控制污染探測,填充狀態測量防過滿,防干運行,以及許多水壓,氣壓系統的測量任務,還有機械工程,屋宇設備工程中。The magswitch is suitable for many liquid and gaseous mediums and is used in vacuum technology pump control, refrigeration technology compressor control, gas technology stock monitoring, leak detection, filter monitoring dirt detection, level measurement overfill protection, dry - running protection, and is also used for a whole variety of measurement tasks in hydraulics and pneumatics, in machine construction and in building technology
磁控開關適用於液體和氣體介質,可以用於真空技術氣泵控制製冷技術壓縮機控制氣體技術貯存量監測泄露探測過濾監測灰塵探測,液位測量過量保護空運行保護,也用於所有機械構造和建造技術中的液壓和氣壓測量任務。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。More recently, david hathaway, a solar physicist at the marshall space flight center nasa and his colleagues predict the peak of solar activity will take place around the middle of the year 2000. their prediction is based on the recent sunspot number and geomagnetic activity
最近,美國太空總署馬歇爾飛行中心的太陽物理學家大偉哈法威及其同事根據太陽黑子的數目和地磁活動,預測太陽活動在2000年中會到達高峰期。According to the characteristic transformation of the eme in the process of its deformation, the stress concentration belt engendered by the coal wedge of the protective coat can be ascertained and the electromagnetic radiation measured result is consistence with the calculation result of the site survey materials
根據煤體變形破裂過程中產生的電磁輻射信號特徵變化,確定了保護層采空區煤柱產生的應力集中帶,電磁輻射測定結果與現場勘測資料計算結果相吻合。According to more effect, when the hore component is placed in a gradient field, at the same time the direction of the current is perpendicular to the direction of the voltage, then between the two parallel side face come out the hore voltage. when hore component is set in this kind of uni - gradient magnetic field and the electric current is unchanged, the voltage output of hore component will be proportional to the position of the hore component in the magnetic field. so we can use the hore component to measure the movement of hore component against magnetic field
根據霍爾效應可知,置於磁場中的霍爾元件若電流方向與磁場方向垂直,則在霍爾元件垂直於磁場和電流方向的兩個側面將產生電勢,將霍爾元件置於強度隨空間位置線性變化的磁場中,且控制電流恆定,輸出就正比于霍爾元件處于磁場中的位置,因此可以用霍爾元件來測量磁場與霍爾元件間的相對位移量。Experimental techniques for simulating cavity decoupling explosion in laboratory wear developed, which include a center initiating explosive charge designed in shape of mini - spherical with yield equivalent to 0. 125 ~ 8. 00gtnt, circular electromagnetic particle velocity gages and aluminum bar strain gages measurement techniques, spherical divergent stress waves generator. large amount of tamped and cavity explosion experiments had been made in granite, soil, cement mortar and water media environment, respectively
本文建立起了包括中心起爆的0 . 125 8 . 00gtnt微型球形炸藥裝置的研製、圓環形電磁粒子速度計及鋁桿應變計測試技術和球形發散應力波實驗裝置等在內的實驗室微型藥量空腔解耦化爆模擬技術,並在花崗巖、土、水泥砂漿和水等介質中進行了大量的填實和空腔爆炸實驗研究。With this technique, one can get rid of the difficulties in geological interpretation caused by considerable variation in the measuring work and remarkable difference in response characteristics of different airborne electromagnetic systems
它擺脫了測量工作中高度的變化以及不同航空電磁系統響應性狀差異很大給地質解釋工作造成的困難。The x - ray diffraction, scanning electronic microscope and the squid were used to characterize the properties of the mgb2 core in mgb2 / fe tapes and wires. the effect of the proportion of mg, b and sic as well as the sintering parameters on the phase formation, microstructure and the critical current densities of mgb2 / fe tapes and wires was discussed in details. the results showed that the high purity of mgb2 core could be synthesized by both the traditional vacuum sintering and the sparking plasma sintering and the vacuum sintering environment restrained the oxidation of mg effectively
相對于傳統真空燒結, sps燒結方式成相速度快、樣品晶粒細小均勻、 mgb2超導芯緻密性好、晶間連接優良,因而sps燒結樣品的臨界電流密度明顯高於傳統真空燒結樣品,其中未摻雜的帶材樣品經過sps800 , 15分鐘燒結后,自場下的臨界電流密度jc值在10k時達到8 . 64 105a / cm2 ,而且隨著測量溫度和外加磁場的增加, sps燒結樣品的臨界電流密度下降率比傳統真空燒結樣品緩慢,在20k ,自場時為5 . 97 105a / cm2 , 20k , 3t時,臨界電流密度值仍大於104a / cm2 。By the test of three - dimensional distribution, form character, rotating frequency and magnetic field intensity of rotating magnetic field, it showed that the magnetic field produced is a highly rotating magnetic field and mainly distribute on welding arc region, rotating frequency and magnetic intensity can be regulated through excitation power source
通過對產生磁場的空間分佈,形態特徵,以及旋轉頻率和場強大小的測試證明該磁場是一個高速旋轉的磁場空間,而且磁場主要集中分佈在焊接電弧區域內,磁場的旋轉頻率和場強大小都可以通過勵磁電源進行良好調節。General model c38 dc meters are portable taut - band suspended moving coil instruments with light - spot indication. the meters have the feature of extremely high in sensitity and small in consumpition being particularly suitable to be used for measuring weak electric quantity on dc circututs, also for testing the static paramenters of transistors as well for measuring the output of millivolt values of zhermocouple in the vacuun furnaces ( or hydrogen furnaces )
C38型直流電表是磁電系張絲支承光點指示可攜式電表儀表具有極高的靈敏度,功耗小,特別適合弱電量直流電路測量及晶體管靜態參數測試用以及用做真空爐(或氧氣爐)中測量熱電偶的輸出毫伏值A miniature electromagnetic yoke was developed for the inspection and maintenance of the complex components of planes
摘要針對航空維修中飛機復雜構件檢測維護的特點,研製了適用於外場作業的微型電磁軛。The research and development for the bump orbit injection system with four kicker magnets centralized in nsrl phase project, and research of some key techniques were summarized, including micro - second pulse ferrite kicker magnet, coated ceramic chamber, measurement device for loss impedance, bpm calibration system, etc
摘要介紹了國家同步輻射實驗室二期工程改造中四沖擊磁鐵集中布局凸軌注入系統研發過程,以及對若干關鍵技術的攻關,包括微秒脈沖鐵氧體沖擊磁鐵研製,鍍膜陶瓷真空盒研製,縱向阻抗測量裝置研製, bpm標定裝置研製等。Further measurements for the deposited films indicate that the appearance and the deposition rate of the films also vary. after we simulate the magnetic field in such case with c program, these variations are owed to distributed change of magnetic field near the target surface and in the discharging space, which can influence the motion of charged particles in the plasma obviously
進一步對沉積薄膜的測量表明,薄膜的沉積速率等發生了變化,通過對空間磁場進行模擬計算發現,由於空間外加的縱向磁場引起了放電空間中以及靶面附近磁場分佈的改變,影響了等離子體中帶電粒子的運動並最終導致了上述變化。Firstly, this paper introduces the asynchronous motor model, and compares it with the dc motor ’ s. then the paper studies the principle of vector control, and proposes an improved current model of rotor flux observer. this paper also studies the three - level inverter ’ s topology, working principle, the neutral - potential unbalance mechanism and its controlling strategy. the paper especially studies the svpwm in details. the interface between the vector control and the three - level inverter is studied in details, including the generation of reference voltage vector, its judging of the sector and triangular regions, and the working mechanism after it sent into three - level inverter. when synthesizing the reference voltage vector, select the vector which only includes p and o states as the starting vector, thus eliminate the vector shift problem when sector changes. this paper fully takes advantages of the powerful functions of matlab / simulink to set up the simulation model. this construction is very explicit. the simulation results verify the inverter voltage output is correct, the rotor flux is steady, the asynchronous motor ’ s dynamic and steady state performances and speed modulation are excellent
本文首先介紹了異步電機的數學模型,在此基礎上將異步電機的數學模型與直流電機的數學模型進行了比較;然後介紹了矢量控制的基本原理,採用了一種改進的轉子磁鏈電流型觀測模型;對三電平逆變器的電路拓撲、工作原理、中點電位不平衡的機理及控制方法進行了介紹,詳細分析了空間矢量脈寬調制策略。本文對異步電機的矢量控制與三電平逆變器之間的介面進行了詳細的研究,包括:參考電壓矢量的形成、所落扇區與具體小三角形區域的判斷、送入逆變器之後的工作機理。在參考電壓矢量的合成時,選擇只包含p 、 o狀態的空間電壓矢量作為起始矢量,解決了扇區切換時的矢量突變問題。The result indicates there is a correspondent relation between the eme and distribution of the stress state in the stress concentration belt, it is an innovation to ascertain the solid coal smear zone with electromagnetic radiation monitor technology to get the stress concentration belt engendered by the coal wedge of the protective coat
結果表明:電磁輻射信號與應力集中帶應力狀態分佈有較好的對應關系,可以電磁輻射監測技術確定保護層采空區煤柱產生的應力集中帶,是確定煤柱影響帶的一種新方法。Virtual - loop ' s function is similar with the inductive loop sensor. each lane can have one or two virtual - loops to detect its traffic parameters. this method avoids the complicated vehicle identification, extraction and tracking
虛擬線圈的作用類似於電磁感應線圈,每個車道可以設置一到兩個虛擬線圈來檢測交通流參數,該方法的特點是避開了在二維圖像空間中進行復雜的車輛特徵提取與跟蹤。分享友人