電聲換能器 的英文怎麼說
中文拼音 [diànshēnghuànnéngqì]
電聲換能器
英文
electrical acoustical transducer-
Electro - acoustic transducers, general specifecation for
可逆電聲換能器組總規范Relaxor ferroelectric single crystals, such as pb ( mg1 / 3nb2 / 3 ) - pbtio3 ( abbreviated as pmnt ) or pb ( zn1 / 3nb2 / 3 ) - pbtio3 ( abbreviated as pznt ), have been reported to exhibit an extremely large piezoelectric constant and excellent electrostrictive properties. such excellent performance makes it fully substitute the traditional piezoelectric ceramics and points to a revolution in ultrasonic transducers, actuators and micro - positioners, making relaxor - based piezocrystals the most promising materials for a broad range of advanced applications. however, it is difficult to grow the high quality single crystals because of the lack of valid thermodynamic data
新型弛豫鐵電單晶鈮鎂酸鉛（簡稱pmnt ）或鈮鋅酸鉛（簡稱pznt ）是一類新興的功能材料，其在準同型相界附近具有優于傳統壓電陶瓷的較高的壓電常數和電致伸縮系數，可完全代替傳統的壓電陶瓷作為超聲換能器、致動器、微位移器等，使其成為鐵電領域的研究熱點，但如何生長出滿足應用要求的單晶材料卻一直是一個困擾的問題。We calculated the electro - acoustical characteristics of designed transducer using the postprocess functions of ansys. according to the above work, we manufactured and measured the real outboard - driven flextensional transducer, then comparing with calculating result
基於以上工作，我們製作了外部驅動彎張換能器的實驗樣機，對實驗樣機的電聲特性進行了測量，並與計算結果進行了對比。To utilize property of saws propagating, it can be made including delay lines, passband filters, oscillators and pitch filters. surface transverse wave ( stw ) was used the configurature of reflective metal - strip grating between the two interdigital transducers, and made the shear horizotal ( sh ) wave on the surface of the piezoelectric substrate, but not to deep in
聲表面橫波（ surfacetransversewave ，簡稱stw ）是採用在兩個金屬叉指換能器之間加入短路柵的隔離板結構使剪切水平波（ shearhorizontalwave ，簡稱sh波）被嵌制在壓電基片表面上，而不是沿壓電基片內傳播的聲表面橫波形式。The input impedance of the interdigital saw transducer is measured by the equivalent circuit method. the experimental results show that the synchronized frequency of 9. 586 mhz, the acoustic radiation resistance of 44. 6 and the static electrode capacity of 194pf all agree with those design values
用自行設計的等效電路測量方案，測量了表面彈性波馬達換能器的輸入阻抗，實驗結果顯示表面彈性波換能器的共振頻率為9 . 586mhz ，輻射聲電阻為44 . 6 ，叉指電極靜電容為194pf 。The emphases of our research works are as follows : under ultra - low temperature ( about 0. 236k ) conditions, how the frequency and power of the saw and the source drain voltage influence the acoustic current ; and the relationship between the source drain current and the split - gate voltage ; and how to find the cut off voltage of the quasi - 1d electron channel ; and also the frequency character of the idt in the saw parts
研究的重點為，在甚低溫（ 0 . 236k ）下，通過實驗研究表面聲波的頻率和功率，源漏偏壓等因素對聲電電流的影響;研究準一維電子通道中不同源漏電流與分裂門負偏壓的關系，以找到分裂門的鉗斷點電壓;以及研究聲表面器件叉指換能器的頻率特性等。Surface acoustic wave ( saw ) motor is a novel micro actuator, which generates saw with the electroacoustic transducer and transfers it to the power of saw motor by the frictional force between the slider and the stator
表面彈性波馬達是一種以電聲換能器產生表面彈性波，並通過馬達動子和定子的接觸摩擦將表面彈性波振動轉換為馬達動力的新型執行器。But to circular plate with large surface area, the vibrate modes generated is often so high that there is reverse phases existing, which result in a decrease in radiation impedance, electric - acoustic efficiency and the electric power, as well as poor directivity
然而對于輻射面積較大的彎曲振動圓盤，一般激勵的振動階數比較高，因此存在彎曲振動的反相區，導致換能器的輻射阻抗下降，電聲效率和聲功率降低以及指向性變差等問題。Standard test method for ultrasonic surface examinations using electromagnetic acoustic transducer techniques
用電磁聲換能器技術進行超聲表面檢驗的標準試驗方法Load characteristics of high power sandwich piezoelectric ultrasonic transducers
夾心式功率超聲壓電換能器負載特性研究Acoustics - characteristics and measurements of ultrasonic piezoelectric transducers up to 100khz
聲學100khz以下超聲壓電換能器的特性和測量Therefore, the piezoelectric ceramic with desired structure and properties can be obtained by introducing pms materials and pzn materials into pzt materials, which has great potential of being widely applied in many fields, especially in advanced sound - electricity transducer
將二者共同引入pzt結構，可獲得較為理想的綜合性能。這種材料在諸多應用領域都有著較好的應用前景，在聲電換能器方面的應用前景尤為受到人們的普遍關注。Wavelet transformation technology is applied to the small - current sensor, and the constructed pulse - respone function of the surface - acoustic - wave transducer is comsidered as a wavelet function, thus the surface - acoustic - wave type of element for wavelet - transformation and reconstruction is manufactured to filter the jamming signal of the small - current sensor effectively
把小波變換技術應用到小電流感測器中，構造的聲表面波換能器脈沖回應函數等於小波函數，從而製造出了聲表面波式小波變換及重構器件，該器件可有效濾除小電流感測器的干擾信號。Acousto - ultrasonic ( au ) measurements were performed on impact - damaged carbon - carbon composites by using plain piezoelectric transducers putting on thin strips symmetrically, instead of commercial acoustic emission ones
根據聲-超聲基本原理，以普通壓電陶瓷傳感器替代商用聲發射超聲換能器，採用傳感器對稱布置方式，對具有預沖擊脫層損傷的碳-碳復合材料薄板做了聲-超聲測試。Standing wave ultrasonic motors have many outstanding features for simple drive and control circuit, stationary speed of rotation, smaller undulation, etc. on the basis of referring and analyzing a large quantity of literatures, the following work has been carried out. one exponential form transducer with rectangle cross - section are designed, which are presented in the dissertation, this kind of transducer fit output great power and make ultrasonic motor gain large amplitude effectively
本文在閱讀和分析了大量國內外有關參考文獻的基礎上，做了以下研究工作:設計了一種矩形截面指數形壓電超聲換能器，這種換能器適合高強大功率超聲波的應用，能有效的為電機提供大振幅振動。Study on the radial vibration of a new type of radial composite piezoelectric ceramic ultrasonic transducers
一種新型徑向復合壓電陶瓷超聲換能器徑向振動特性研究Because of a large number of data processing to carry out, tms320c5402 dsp, electromagnetic ultrasonic transducer, oscillatory source circuit, receive signal disposal circuit, a / d, sram, flash memory and display circuit are selected to design the prototype of a machine of the real - time measurement system
由於要進行大量的數據處理，硬體電路採用了ti公司的tms320c5402dsp作為核心處理器件，輔以電磁超聲換能器、激勵源電路、接收信號調理電路、 a d 、 sram 、 flashmemory及顯示電路，設計出實時檢測系統的樣機。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器電端匹配問題，分析了超聲波換能器在諧振頻率三次諧波下的阻抗特性，給出了超聲換能器三次諧波下的阻抗電路模型.並根據阻抗電路模型建立了對超聲換能器的夾持電容實現在線檢測簡單、可靠性高的方法，實驗證明該方法有效的.該方法可以在換能器工作過程中隨時檢測夾持電容的變化，根據檢測結果對匹配電感進行動態調整，實現真正意義上的換能器電端的動態匹配，從而大大改善匹配質量，提高系統的工作性能The factors include ultrasonic wave frequence, condition temperature, ultrasonic converter instrinisic system error, hareware extended time, electricity noise and sonic noise in the spot, city power defmcient pressure and exceeded pressure, city power peak and pour. we adopt the following compensation schemes of error in the system. about ultrasonic wave frequence ' s effect to measurement precision, we can choose appropriate frequence according to the measured distance
在空氣和液壓缸中影響測距精度的主要因素包括：超聲波的頻率、環境溫度、超聲換能器本身的系統誤差（即探頭固定誤差） 、硬體時間延遲、工作現場的電噪聲和聲噪聲、市電的過壓、介壓噪聲以及市電的尖峰和浪涌噪聲，在本系統中採取了以下幾種誤差的補償方案： ?對于超聲波的頻率對測量精度的影響，只能根據測距的距離選擇合適的超聲頻率。In the past, piezoelectricity transducer was adopted usually in the ultrasonic flowmeter development, so in higher temperature, for example, exceeds 150 " c, the measurement was not carried out
以往的超聲流量計均採用壓電超聲換能器進行測量，這樣在被測流體溫度較高，超過150的情況下，就無法進行測量了。分享友人