本文選題：風(fēng)能回收 + 諧振腔��； 參考：《合肥工業(yè)大學(xué)》2017年碩士論文

【摘要】：微電子、傳感器以及無線通訊等領(lǐng)域的快速發(fā)展與融合,促使了無線傳感網(wǎng)絡(luò)技術(shù)的誕生,并在生態(tài)環(huán)境監(jiān)測(cè)、建筑安全保障、軍事偵察預(yù)警等領(lǐng)域發(fā)揮了重要的應(yīng)用價(jià)值。然而,現(xiàn)有無線傳感網(wǎng)絡(luò)節(jié)點(diǎn)大多依賴電池供電,存在環(huán)境污染、壽命有限、充電和更換困難等問題,成為阻礙無線傳感網(wǎng)絡(luò)技術(shù)發(fā)展的主要因素。隨著超低功耗電子技術(shù)的發(fā)展,無線傳感網(wǎng)絡(luò)節(jié)點(diǎn)的功耗可降低到毫瓦以下級(jí)別,使得回收周圍環(huán)境中的微弱能量為傳感節(jié)點(diǎn)供電成為可能。風(fēng)能作為一種自然界廣泛存在的可再生能源,開發(fā)微型化的風(fēng)能回收裝置并為偏遠(yuǎn)地區(qū)的無線傳感網(wǎng)絡(luò)節(jié)點(diǎn)供電,將會(huì)有廣闊的應(yīng)用前景。為了提高風(fēng)能回收的效率,提升裝置工作的穩(wěn)定性,本文提出了一種音叉簧片式壓電諧振腔風(fēng)能回收裝置,并完成了以下研究工作:(1)總結(jié)風(fēng)致振動(dòng)風(fēng)能回收的基本結(jié)構(gòu)原理和壓電懸臂梁振動(dòng)能量回收的基本理論,建立音叉簧片式壓電諧振腔風(fēng)能回收的理論基礎(chǔ)。(2)對(duì)單簧片和雙簧片諧振腔風(fēng)能回收結(jié)構(gòu)進(jìn)行模態(tài)和流固耦合仿真分析,對(duì)比分析兩個(gè)裝置的振動(dòng)形態(tài)、固有頻率以及腔體氣流作用規(guī)律。(3)制作單簧片和雙簧片諧振腔風(fēng)能回收裝置樣機(jī),搭建實(shí)驗(yàn)測(cè)試平臺(tái),實(shí)驗(yàn)測(cè)試了關(guān)鍵結(jié)構(gòu)、電學(xué)參量對(duì)回收能量的影響,并對(duì)比分析了兩個(gè)原理樣機(jī)的風(fēng)能回收性能。實(shí)驗(yàn)結(jié)果表明:適宜的腔體、簧片尺寸匹配可獲得較低的起振風(fēng)速和較寬的風(fēng)速范圍;簧片安裝方向?qū)︼L(fēng)能回收影響較小,簧片安裝角度對(duì)起振風(fēng)速、輸出電壓有較大的影響;音叉雙簧片結(jié)構(gòu)比單簧片結(jié)構(gòu)具有更好的風(fēng)能回收性能。腔體尺寸40×40×140mm~3的音叉簧片風(fēng)能回收裝置,在6m/s風(fēng)速、0.15MΩ最優(yōu)負(fù)載情況下,輸出功率達(dá)到0.83m W,能量轉(zhuǎn)換效率達(dá)到0.37%。綜上所述,本文設(shè)計(jì)的音叉簧片式壓電諧振腔風(fēng)能回收裝置具有良好的風(fēng)能轉(zhuǎn)化性能,可用于風(fēng)能豐富的偏遠(yuǎn)地區(qū)無線傳感網(wǎng)絡(luò)節(jié)點(diǎn)供電。
[Abstract]:The rapid development and integration of microelectronics, sensors and wireless communication has promoted the birth of wireless sensor network technology, and has played an important role in ecological environment monitoring, building safety protection, military reconnaissance and early warning. However, most of the existing wireless sensor network nodes rely on battery power supply, environmental pollution, limited life, charging and replacement difficulties, become the main factors that hinder the development of wireless sensor network technology. With the development of ultra-low power electronic technology, the power consumption of wireless sensor network nodes can be reduced to less than milliwatt, which makes it possible to recover the weak energy in the surrounding environment to power the sensor nodes. Wind energy is a kind of renewable energy widely existing in nature. Developing miniature wind energy recovery device and supplying power to wireless sensor network nodes in remote areas will have a broad application prospect. In order to improve the efficiency of wind energy recovery and enhance the stability of the device, a tuning fork and Reed type piezoelectric resonator wind energy recovery device is proposed in this paper. The main works are as follows: (1) the basic structure principle of wind-induced wind energy recovery and the basic theory of vibration energy recovery of piezoelectric cantilever beam are summarized. The theoretical basis of wind energy recovery of tuning fork Reed piezoelectric resonator is established. (2) the modal and fluid-solid coupling simulation analysis of wind energy recovery structure of single Reed and double spring resonator is carried out, and the vibration patterns of the two devices are compared and analyzed. (3) the prototype of wind energy recovery device with single Reed and double spring resonator is made, and the experimental test platform is set up. The key structure and the effect of electrical parameters on the recovery energy are tested experimentally. The wind energy recovery performance of two principle prototypes is compared and analyzed. The experimental results show that the suitable cavity size matching can obtain lower starting wind speed and wider wind speed range, the direction of Reed installation has little effect on wind energy recovery, and the installation angle of Reed has great influence on the starting wind speed and output voltage. The tuning fork double spring structure has better wind energy recovery performance than the single Reed structure. With 40 脳 40 脳 140mm~3 tuning fork wind energy recovery device, under the optimal load of 0.15m 惟 of 6m/s wind speed, the output power reaches 0.83m Wand the energy conversion efficiency reaches 0.37m. In conclusion, the tuning fork and Reed piezoelectric resonator wind energy recovery device designed in this paper has good wind energy conversion performance and can be used to supply power to wireless sensor network nodes in remote areas with abundant wind energy.
【學(xué)位授予單位】：合肥工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TM614

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