工作中傳聲器 的英文怎麼說
中文拼音 [gōngzuòzhōngzhuànshēngqì]
工作中傳聲器
英文
hot mike-
Investigators at aerojet-general corporation and other organizations have applied acoustic emission with multiple transducers, and triangulation techniques to the detection and location of flaws in large structures.
通用航空噴氣公司和其他機構的研究人員用多路傳成器和三角定位技術將聲發射應用於大型結構的襲紋檢測與定位工作中。Compared with the pressure hydrophone, vector transducer can provide both the information about pressure ( scalar quantity ) and particle velocity ( vector quantity ) of the sound field, which offers more possibilities for signal processing. so vector transducer and its signal processing have attracted the attention of researchers both native and foreign. in this thesis, a method of correlation equations for pressure gradient transducer is presented, and the estimation of multi - signal parameters with single vector transducer is given
與傳統的聲壓水聽器相比,矢量水聽器既能獲得聲場中的聲壓這一標量信息,又能獲得聲場中質點振速這一矢量信息,這為其信號處理帶來更大的空間,因此矢量水聽器及其相應的聯合信息處理技術日益成為國內外科技工作者們研究的熱點。The fault that the series resistor has high value can be avoided by using the constant current amplifier, and the fault that the dividing resistor reduces the working voltage of the speaker can be avoided by using the constant voltage amplifier
使用恆流功放,可以避免傳統方法中串聯電阻取值過大的缺點;使用恆壓功放,可以消除分壓電阻降低揚聲器工作電壓的不足。The research works finished in this paper are listed below : 1. solving the problem in testing of cylinder vessels that the sensors disposition is very rigorous, carrying out study of freewill triangle network orientation and linear orientation, bringing forward the discriminance which distinguish the validity of orientation array using character string method the first time, at the same time, solving the problems that judgement of orientation array, elimination of camouflage location, avoidance of repeat location, etc. 1 '. carry ing out the study of the orientation of defects in stand lank floor with the method of freewill planar triangle orientation, advancing bran - new discriminance on the validity of orientation arrays, orientation points, and the disposing means of the acoustic sources near sensors and those near common border
本文進行的主要研究工作有: 1解決柱式容器檢測中傳感器排布要求較嚴格的問題,開展任意三角形網路排布檢測技術與線定位技術研究,首次提出了利用字元串格式判斷線定位陣列有效性的判別方法,並解決了任意三角形定位中存在的定位陣列判斷,偽定位的剔除,重復定位的避免等一系列問題; 2利用平面任意三角形定位方法開展常壓立式儲罐罐底缺陷定位技術研究,提出了全新的定位陣列有效性判斷、定位點的有效性判斷方法;以及頂點聲源和邊界聲源的處理辦法。Both advantages of rocket engine and air - breathing engine are integrated into one kind of propulsion system, called rocket - based - combined - cycle ( rbcc ), which has multiple operating woke modes, including ejecting, subsonic combustion, supersonic combustion and rocket mode, with each mode operating at varying flying stage. rbcc has prominent potential of high efficiency and low cost, and so it is recognized as an advanced propulsion system of future single - stage - to - orbit reusable spacecraft and hipper - sonic missile. it has been broadly investigated in foreign countries and has been progressed into small and full - scale flying stage
火箭基組合動力循環( rbcc , rocketbasedcombinedcycle )將傳統的火箭發動機和吸氣式發動機的優點集中組合到一個具有多種工作模態(包括引射、亞燃、超燃及火箭模態)的發動機里,在不同的飛行階段啟用不同的工作模態,因此具有大幅提高航天推進系統經濟性與高效性的潛在優勢,並可能發展成為下一代單級可重復使用航天器以及高超聲速導彈武器的動力系統。It utilizes two boltclamped langevin transducers with unanimous frequency characteristic which convert vertical vibration to flexural traveling wave. they are arranged on the place of a elastic pipe to generated traveling - wave. when the traveling - wave propagate, the particles on the elastic pipe traverse an elliptic trajectory, materiel is transported by friction or acoustic streaming
利用兩套頻率特性一致並以縱向振動方式工作的夾心式換能器,通過合理的布局在導管中激勵出行波,使輸送管管壁質點產生橢圓運動,從而利用摩擦或在液體中產生聲流來實現固體及液體的傳送。For example, the geometric effect and vignetting are simulated with the synthetic method in which they are modeled with ray tracing and then simulated with pixel - based processing. the effects of detector noise on imaging are simulated with the three - dimension model. the theory of pixel transfer function is extended and developed, and microscanned images of four patterns are simulated with good results
本文具有如下幾個突出特點:用光線追跡法分析建模,而用基於象素處理的綜合方法,模擬了光學系統中的幾何效應和漸暈現象;利用三維噪聲模型,模擬了探測器噪聲對圖像質量的影響;對象素傳遞函數理論進行了擴展和延伸,給出四種工作模式的微掃描成像系統的象素傳遞函數的具體數學表達式,並利用這些表達式模擬了探測器的空間效應和微掃描成像的圖像效果。Following, we developed an electronic nose adopting advanced technology which combined capillary column to separate vocs according their different retention time and surface acoustic wave sensor coating with polymer film to detect the qualities of those vocs. in my article, lung cancer situation, breath detection principle, feasibility of electronic nose adopting breath detection, and the principles of spme & gc have been particularly introduced. and initially certified the correlation between lung cancer and the marker vocs by detecting lung cancer patients breath, normal human breath, and lung problem patients by solid phase microextraction ( spme ) and gas chromatography ( gc ) system
本課題根據國外關于呼吸氣體中某些有機氣體成分和肺癌相關性的研究工作報告,採用固相微萃取?氣相色譜系統對肺癌病人呼吸氣體、正常人呼吸氣體、和其它類肺病患者呼吸氣體中的有機氣體成分進行對比檢測、研究,以期確定肺癌病人呼吸氣體中特徵有機氣體成分;並且期望建立首創的採用毛細管色譜柱與聲表面波傳感器聯用技術的電子鼻系統,與固相微萃取?氣相色譜系統作為對比檢測,能夠做到粗篩肺癌病人。The present research subject applies supersonic and pressure sensitive techniques of the nondestructive inspection technology in the tensile test of the samples, replacing the old manual operation, manual measurement and naked - eye inspection
本課題在無損探測技術中選擇超聲技術和壓力傳感器應用到試驗試件拉伸檢測中,取代人工操作、手工測量、肉眼觀察的落後方法。It was demonstrated that this sort of load - control apparatus has superior performance. we used a electric transmitter as the transducer to collect the sound signal, using the daq toolbox of the matlab to achieve the collection of the sound signal, and using the dsp toolbox of the matlab and the sound - launch technology to analyze the time - domain characteristic and the frequency - domain characteristic of the signal, chiefly analyze its short - time average amplitude, its short - time over - zero ratio and its estimate of the power chart and the average - period chart
實驗中使用了駐極體話筒作為球磨機聲音拾取傳感器,利用matlab中的數據採集( daq )工具箱實現對磨音的採集,利用matlab信號分析( dsp )工具箱和聲發射技術對磨音進行時域和頻域分析,主要分析磨音的短時平均幅度和能量、短時平均過零率、功率譜估計和平均周期圖。One of the key techniques is the detection of near infrared ( 1310nm and 1550nm ). because the quantum key is transmitted by one photon, and 1310nm and 1550nm infrared are the lost loss wavelength in fiber. we can detect the visible light now, but it is difficult to detect the near infrared because of its low energy
量子通信的關鍵技術之一就是紅外( 1310nm 、 1550nm )單光子探測,這是因為光量子密鑰傳輸是採用單個光子來實現的, 1 . 3微米和1 . 5微米是現在所使用的光纖通信中損耗最小的波長,現有成熟的單光子探測器工作波長都是在可見光波段,而紅外光子因為能量小,信號非常微弱,極易被噪聲淹沒,因而非常難探測到。Based on above performances the applications of multi - sensor data fusion in state estimation for maneuvering target is studied systemically. the main work includes : based on the analysis that the extreme value of acceleration presupposed causes influence in the “ current ” statistical model, a modified model is given, which utilizes the functional relationship between maneuvering status and estimation of the neighboring intersample position vector to carry out the self - adaptive of the process noise variance. then combining with the recursive characteristic of kalman filter, an improved self - adaptive filtering algorithm is presented
基於此,本文針對多傳感器數據融合技術在機動目標狀態估計中的應用進行了系統的研究,其主要工作如下: 1 、基於「當前」統計模型中加速度極限值的預先設定對于濾波效果影響的分析,利用目標機動狀況與相鄰采樣時刻間位置估計量變化之間的函數關系實現噪聲方差自適應,進而提出了一種修正的模型,並結合卡爾曼濾波遞推演算法,提出了一種改進的自適應濾波演算法。分享友人