Fe method of analysing detecting electrode of capacitance proximity fuze 電容近炸引信探測電極的有限元分析
The effect in the vicinity of the exciting electrode and detecting electrode is greater than that of the center of the pipe 離散相介質(zhì)的存在對激勵電極和測量電極附近區(qū)域靈敏場的影響比較大,對管道中心區(qū)域的影響則比較小。
This paper describes a reconstructive algorithm which is based on network theory for electrical capacitance tomography technic . there are twelve electrodes in the system . the permittivity distribution of flow with two components within a pipeline is reconstructed . assume the permittivity distribution of the region to be reconstructed . then whole measured area is discretized into a network composed of capacitance . the measurement circuit which contains a pair of source electrode and detecting electrode is taken as a four - terminal network . the across admittance of the four - teminal network is proportional to the capacitance between the source electrode and the detecting electrode . modify the distribution of the permittivity according to the difference between the calculated capacitance and measured capacitance . the experimental results show that this algorithm is effective and can coverge 本文描述了一種用于兩種成份的流體成像的12電極電容層析成像新方法.該方法基于電路的網(wǎng)絡(luò)理論,首先對重建區(qū)域假定一個介電率分布,用電容網(wǎng)絡(luò)作為離散化模型,將每一個源電極和探測電極對組成的測量電路看作一個四端網(wǎng)絡(luò),該四端網(wǎng)絡(luò)的跨導(dǎo)與源電極和探測電極之間的電容值是線性關(guān)系,這個電容值和測量得到的電容值之間存在誤差,根據(jù)這個誤差對修正介電率分布.通過對不同介質(zhì)分布作的模擬實驗結(jié)果,證實了該算法是有效的,收斂的
In this thesis , we focus on dual axis capacitance vibration transducer , which was fabricated by micro - electromechanical systems ( mems ) . the operation mechanism of this kind of accelerometer was analyzed . under external acceleration , the space between sensitive quality mass and detecting electrode will change , which causes the variation of equivalent capacitance 本論文研究了采用微機械加工技術(shù)( mems )制作的雙軸電容式振動傳感器,其基本工作原理是利用慣性質(zhì)量塊在外界加速度的作用下與檢測電極間的空隙發(fā)生改變,從而引起等效電容的變化來測定振動加速度的。