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piezoelectric crystal 壓電晶體。

piezoelectricity

In this paper , two kinds of grain - flow - measurement - systems for combine harvesters are developed in laboratory , radiometric sensor using the principle of the absorption of y - rays by grains and piezoelectric crystal sensor using the principle of impact 關于谷物流量在線測量的研究方法,有光電、沖量法、核輻射及電容傳感器等。這些測量方法雖各具特色,但至今在應用上仍還有各自的缺陷需要解決。

This paper firstly makes experience study of grain flow dynamic measurement for combines in china . piezoelectric crystal sensor used in impulse measurement method is a try and has not been presented in any reports 本文在國內率先進行了谷物流量動態在線測量方法的試驗研究,并嘗試性地將壓電晶體傳感器用于沖量式谷物流量測量方法中,這在國內外均未見報道。

The test results show that the measurement errors of y - ray measurement system are within 2 % , and the errors of piezoelectric crystal measurement system are about 5 % . it indicates that the sy stems are feasible 試驗結果顯示,射線測量系統精度可達到2以內,壓電晶體傳感器測量精度約為5 ,表明系統是有效可行的。

Because this transducer not only has a firm structure and uses the longitudinal mechanic - electricity coupling coefficient of piezoelectric crystals , but also can be easily made , it has very good electricity - sound ability 由于制作工藝簡單,結構堅固,且又利用壓電陶瓷的縱向機電耦合系數,因此具有良好的電聲性能。

Explain the characteristics of piezoelectric crystals and the factors relating to the resonant frequencies of a piezoelectric crystal , and the procedure of the pulse - echo method 說明壓電晶體的特性和與壓電晶體的共振頻率有關的因數,以及脈波回波法的過程。

Precise thickness - shear resonance frequency of electroded piezoelectric crystal plates and its applications in resonator design 帶電極壓電晶體板厚剪共振頻率的精確確定及其在諧振器設計中的應用

The surface acoustic waves stress sensitive properties of piezoelectric crystal la3ga5sio14 base on stress sensitive coefficients 基于應力敏感系數的硅酸鎵鑭晶體聲表面波應力敏感特性

Letter symbols for physical quantities - part 9 : symbols for equivalent circuits of piezoelectric crystals 物理量的字母符號.第9部分:壓電晶體等效電路符號

Method of determining the cutting orientation with maximum coefficients of piezoelectric crystals 壓電晶體最大特征系數切向判定方法