本文選題：微機(jī)電系統(tǒng) + 振動能量收集��； 參考：《南京郵電大學(xué)》2017年碩士論文

【摘要】：隨著微機(jī)電系統(tǒng)技術(shù)和集成電路技術(shù)日趨發(fā)展,小尺寸、低功耗的微傳感器和微執(zhí)行器的研發(fā)取得了巨大的進(jìn)步,在人體健康檢測系統(tǒng)[1]、結(jié)構(gòu)安全檢測系統(tǒng)[2]、嵌入式系統(tǒng)等等方面都取得了廣泛的應(yīng)用。但是這些系統(tǒng)設(shè)備通常需要微型電池作為供電材料,雖然這些電池能起到很好的供能作用,但是也存在著明顯的缺陷,比如電池壽命有限需要不斷更換、尺寸較大、受環(huán)境影響、化學(xué)毒性比較嚴(yán)重。這些都制約著微型器件的發(fā)展,國內(nèi)外研究者提出從環(huán)境周圍中收集能量,并將其轉(zhuǎn)換成電能供給設(shè)備使用。但是目前在研究中存在許多問題,比如由于能量收集裝置的尺寸導(dǎo)致輸出功率太小,并且大多數(shù)裝置只有一個共振頻率,頻率范圍太小,導(dǎo)致可以應(yīng)用的場合單一和能量收集的效率低下。本論文針對目前能量收集裝置存在的輸出功率過低,工作頻率范圍太窄等問題,提出了一種圓盤形壓電式能量采集結(jié)構(gòu)。本文首先對壓電能量收集器的工作原理做了詳細(xì)的分析,包括材料的選擇、材料將振動能轉(zhuǎn)化為電能的過程、壓電懸臂梁模型的分析、壓電懸臂梁機(jī)電耦合理論分析,為器件的設(shè)計提供了理論依據(jù)。然后利用ANSYS有限元模型對器件的性能進(jìn)行仿真分析,研究器件各類參數(shù)對性能的影響。最后通過研究的器件各類參數(shù)對性能的影響,優(yōu)化器件結(jié)構(gòu)設(shè)計,并設(shè)計了一種新的結(jié)構(gòu),用來提高器件的輸出特性,并拓寬器件工作頻率范圍。
[Abstract]:With the development of MEMS and IC technology, the research and development of micro sensors and microactuators with small size and low power consumption have made great progress. It has been widely used in human health detection system, structural safety detection system, embedded system and so on. But these systems often require miniature batteries as the power supply materials. Although these batteries can provide good energy, they also have obvious drawbacks, such as the limited life of the batteries, which need to be constantly replaced, and the size of the batteries is large. Under the influence of environment, the chemical toxicity is more serious. All these restrict the development of micro devices. Researchers at home and abroad proposed to collect energy from the environment and convert it into power supply equipment. But at present there are many problems in the research, for example, the output power is too small because of the size of the energy collection device, and most devices have only one resonance frequency, and the frequency range is too small. Results in the application of single and inefficient energy collection. In order to solve the problems of low output power and narrow frequency range, a disk piezoelectric energy acquisition structure is proposed in this paper. In this paper, the working principle of piezoelectric energy collector is analyzed in detail, including the selection of material, the process of material converting vibration energy into electric energy, the analysis of piezoelectric cantilever model, and the analysis of electromechanical coupling theory of piezoelectric cantilever beam. It provides a theoretical basis for the design of the device. Then the ANSYS finite element model is used to simulate and analyze the performance of the device, and the influence of various parameters on the performance is studied. Finally, by studying the influence of various parameters on the performance of the device, the structure design of the device is optimized, and a new structure is designed to improve the output characteristics of the device and broaden the operating frequency range of the device.
【學(xué)位授予單位】：南京郵電大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TM619

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