本文關(guān)鍵詞： 中間固定支撐 壓電振子 振型 位移 骨傳導(dǎo)聽(tīng)覺(jué)裝置　出處：《吉林大學(xué)》2012年碩士論文　論文類型：學(xué)位論文

【摘要】：基于壓電振子的逆壓電效應(yīng)和骨傳導(dǎo)傳聲原理，以壓電振子為聽(tīng)覺(jué)裝置聲發(fā)生元件，本文研制了一種可應(yīng)用于外部佩戴的壓電振子中間固定支撐式骨傳導(dǎo)聽(tīng)覺(jué)裝置，并對(duì)其關(guān)鍵技術(shù)進(jìn)行了研究。具體研究?jī)?nèi)容如下： 1.骨傳導(dǎo)聽(tīng)覺(jué)裝置發(fā)展背景及其國(guó)內(nèi)外發(fā)展現(xiàn)狀 骨傳導(dǎo)聽(tīng)覺(jué)裝置工作時(shí)通過(guò)振子振動(dòng)顱骨直接將聲波傳遞至內(nèi)耳使人感知音訊信號(hào)。它不僅適用于具有化膿性中耳炎、外耳道狹窄等疾病的聽(tīng)障人士；也適用于正常人，解放其雙耳、保護(hù)其聽(tīng)力；更適用于在高噪音環(huán)境工作的人士。國(guó)內(nèi)外的現(xiàn)狀表明：電磁式骨傳導(dǎo)聽(tīng)覺(jué)裝置是目前市場(chǎng)的主流，但壓電式骨傳導(dǎo)聽(tīng)覺(jué)裝置以其功耗低、無(wú)電磁輻射、結(jié)構(gòu)緊湊、質(zhì)量小等優(yōu)點(diǎn)成為目前研究的熱點(diǎn)，目前以植入式為主，可用于外部佩戴的骨傳導(dǎo)聽(tīng)覺(jué)裝置仍處于起步階段。 2.壓電式骨傳導(dǎo)聽(tīng)覺(jué)裝置的相關(guān)基礎(chǔ)理論 對(duì)聲音的物理性質(zhì)、人耳的基本構(gòu)造、人耳感知聲音的方式、人耳的聽(tīng)閾等聽(tīng)力學(xué)知識(shí)以及壓電陶瓷的性能參數(shù)，壓電振子的等效電路、諧振特性、遲滯特性、幅頻特性等壓電學(xué)知識(shí)進(jìn)行了分析，為研究壓電式骨傳導(dǎo)聽(tīng)覺(jué)裝置奠定理論基礎(chǔ)。 3.中間固定支撐式不同形狀壓電振子的有限元仿真分析 對(duì)圓形壓電振子中間點(diǎn)支撐方式，，方形、橢圓形、矩形壓電振子中間點(diǎn)支撐和線支撐方式分別做靜力學(xué)、模態(tài)及諧波響應(yīng)特性的仿真分析。分析不同形狀壓電振子中間點(diǎn)支撐和線支撐方式下的最大靜力學(xué)變形量及振型，確定中間線支撐方式下的矩形壓電振子與中間線支撐方式下的方形壓電振子作為試驗(yàn)研究的對(duì)象。 4.中間線支撐式矩形壓電振子與方形壓電振子關(guān)鍵性能的試驗(yàn)研究 對(duì)中間線支撐方式下的方形和矩形壓電振子的徑向變形特性、幅頻特性進(jìn)行測(cè)試，將試驗(yàn)結(jié)果與仿真結(jié)果進(jìn)行對(duì)比，驗(yàn)證仿真結(jié)果的正確性。對(duì)兩種壓電振子的波形響應(yīng)特性、滯后特性進(jìn)行測(cè)試，分析兩種壓電振子的試驗(yàn)結(jié)果，驗(yàn)證中間線支撐方式下的矩形與方形壓電振子作為骨傳導(dǎo)聽(tīng)覺(jué)裝置用聲發(fā)生元件的可行性。測(cè)試中間線支撐方式下的方形和矩形壓電振子的支撐柱尺寸參數(shù)的變化對(duì)壓電振子位移、響度的影響。 5.聽(tīng)覺(jué)裝置的結(jié)構(gòu)設(shè)計(jì)及相關(guān)性能的測(cè)試研究 對(duì)電聲學(xué)分頻工作原理進(jìn)行研究。通過(guò)仿真的方式確定中間固定支撐式雙壓電振子骨傳導(dǎo)聽(tīng)覺(jué)裝置用高、低頻壓電振子及其支撐柱的尺寸、聽(tīng)覺(jué)裝置的分頻點(diǎn)。對(duì)聽(tīng)覺(jué)裝置的整體結(jié)構(gòu)、上蓋、下蓋等進(jìn)行設(shè)計(jì)并制作了樣機(jī)。對(duì)聽(tīng)覺(jué)裝置的電壓位移特性、電壓響度特性、階躍響應(yīng)特性等進(jìn)行測(cè)試以研究聽(tīng)覺(jué)裝置的動(dòng)態(tài)響應(yīng)性能。對(duì)聽(tīng)覺(jué)裝置在不同頻率激勵(lì)信號(hào)激勵(lì)下的產(chǎn)生的聲壓值進(jìn)行測(cè)試，對(duì)測(cè)試結(jié)果進(jìn)行分析，激勵(lì)信號(hào)在中、低頻范圍時(shí)，高頻壓電振子與低頻壓電振子的聲壓值響應(yīng)性能相差不大，低頻壓電振子的性能略好于高頻壓電振子；激勵(lì)信號(hào)在高頻范圍時(shí)，高頻壓電振子的聲壓值響應(yīng)性能要明顯優(yōu)于低頻壓電振子。
[Abstract]:The inverse piezoelectric effect and bone conduction transmission principle of piezoelectric vibrator based on piezoelectric vibrator for hearing device sound generating element, this paper developed a can be applied to external wear piezoelectric vibrator intermediate fixed support type bone conduction hearing device, and the key technologies are studied. The specific research contents the following:
The development background of 1. bone conduction auditory device and its development status at home and abroad
Bone conduction hearing device work through the vibrator directly to the skull to the inner ear to sound perception. It is not only suitable for the audio signal with suppurative otitis media, hearing impaired external auditory canal stenosis and other diseases; also suitable for normal people, the liberation of the ears, protect their hearing; more suitable for people working in high noise the environment. That situation at home and abroad: electromagnetic bone conduction hearing device is the mainstream market, but the piezoelectric bone conduction hearing device with its low power consumption, no electromagnetic radiation, has the advantages of compact structure, small quality has become a research hotspot at present, can be used for implantable, bone conduction hearing device external wear is still in its infancy.
The basic theory of 2. piezoelectric bone conduction auditory device
The physical properties of sound, the basic structure of the human ear, ear perception sound, ear hearing and audiology knowledge and piezoelectric ceramic performance parameters, the equivalent circuit of the piezoelectric vibrator resonant characteristics, hysteresis characteristics, amplitude frequency characteristics of isobaric electrical knowledge is analyzed for the study of piezoelectric bone conduction hearing device and laid a theoretical basis.
Finite element simulation analysis of 3. different shape piezoelectric vibrators with intermediate fixed support
The piezodisc intermediate point support type, square, oval, rectangular piezoelectric vibrator middle point support and line support are static simulation of response characteristic of modal and harmonic analysis. The statics of different shapes of piezoelectric vibrator intermediate point support and line support under the mode of deformation and vibration sure, the object as an experimental study of square middle line support mode of the rectangular piezoelectric vibrator and the middle line support mode of the piezoelectric vibrator.
Experimental study on the key performance of rectangular piezoelectric vibrator and square piezoelectric vibrator with 4. intermediate line
The deformation characteristics of radial modes of square and rectangular piezoelectric vibrator of the middle line support, the amplitude frequency characteristic test, the test results and the simulation results were compared to verify the correctness of the simulation results. Two kinds of piezoelectric vibrator test waveform response characteristics, hysteretic characteristics, analysis of the test results of two kinds of pressure the electric vibrator, verify the feasibility of the middle line support mode of the rectangular and square piezoelectric oscillator as the bone conduction hearing device with sound generating element. Displacement test middle line support support column under the size parameters of square and rectangular piezoelectric vibrator of the piezoelectric vibrator, the influence of loudness.
The structural design of 5. auditory devices and the test and study of related performance
Research on the working principle of acoustics with high frequency. Through the way of simulation to determine the intermediate fixed support type double piezoelectric bone conduction hearing device, low frequency piezoelectric vibrator and the size of a supporting column, a hearing device frequency. The overall structure, the hearing device cover, a lower cover design and production the prototype. The voltage displacement characteristic of hearing device, voltage loudness characteristics, step response test to study the dynamic response performance of hearing device. Hearing device in different frequency excitation signal excitation produced the pressure test, the test results are analyzed, the excitation signal in low frequency range. High frequency piezoelectric oscillator with low frequency piezoelectric oscillator pressure response performance difference, low frequency properties of the piezoelectric vibrator is slightly better than high frequency piezoelectric oscillator; excitation signal in high frequency range, high frequency piezoelectric vibrator sound The performance of the pressure value response is obviously superior to the low frequency piezoelectric vibrator.

【學(xué)位授予單位】：吉林大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2012
【分類號(hào)】：TH785.1

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 姜德義,鄭拯宇,李林,任松;壓電陶瓷片耦合振動(dòng)模態(tài)的ANSYS模擬分析[J];傳感技術(shù)學(xué)報(bào);2003年04期

2 蔡鶴皋，孫立寧，安輝;壓電／電致伸縮微位移器件與應(yīng)用（下）[J];高技術(shù)通訊;1994年06期

3 馬海峰,周桃生;壓電陶瓷機(jī)械品質(zhì)因數(shù)Q_m及其溫度穩(wěn)定性[J];湖北大學(xué)學(xué)報(bào)(自然科學(xué)版);2003年01期

4 蔡藝;;骨導(dǎo)耳機(jī)在公安部門(mén)的應(yīng)用[J];警察技術(shù);2007年04期

5 成天龍;LC二分頻器與電子分頻器的性能比較[J];科技情報(bào)開(kāi)發(fā)與經(jīng)濟(jì);2002年02期

6 徐錫林;壓電型微驅(qū)動(dòng)器[J];上海交通大學(xué)學(xué)報(bào);1997年01期

7 鮑善惠;王艷東;;壓電換能器在并聯(lián)諧振頻率附近特性的研究[J];聲學(xué)技術(shù);2006年02期

8 羅怡珊;汪源源;徐峰;俞承芳;他得安;王威琪;;時(shí)域有限差分法研究骨傳導(dǎo)超聲特性[J];聲學(xué)技術(shù);2007年05期

9 張凱;黨選舉;曹鳳金;;基于小波變換的壓電陶瓷動(dòng)態(tài)遲滯特性建模[J];微電子學(xué)與計(jì)算機(jī);2009年06期

10 張春生;常青;;特殊分頻電路設(shè)計(jì)[J];現(xiàn)代電子技術(shù);2006年06期

相關(guān)博士學(xué)位論文 前1條

1 孫景陽(yáng);壓電式骨傳導(dǎo)聽(tīng)覺(jué)裝置振動(dòng)器結(jié)構(gòu)設(shè)計(jì)與試驗(yàn)研究[D];吉林大學(xué);2010年

相關(guān)碩士學(xué)位論文 前1條

1 徐震宇;矩形雙晶片壓電式骨傳導(dǎo)聽(tīng)覺(jué)裝置的研究[D];吉林大學(xué);2008年

本文編號(hào)：1541164