發(fā)布時(shí)間：2018-07-04 21:12

  本文選題：能量與信息同步傳輸 + Royer振蕩�。� 參考：《重慶大學(xué)》2016年碩士論文

【摘要】：無線電能傳輸技術(shù)(Wireless Power Transfer,WPT)不需任何物理接觸即可實(shí)現(xiàn)能量傳輸,具有靈活方便的特點(diǎn),在一些移動(dòng)設(shè)備供電中有著廣泛應(yīng)用前景。在智能彈藥、人體植入式設(shè)備、傳感器網(wǎng)絡(luò)、RFID(Radio Frequency Identification)等領(lǐng)域,傳輸能量的同時(shí)還需要傳輸控制命令及接收反饋信息,能量與信息的同步傳輸會(huì)面臨能量信號(hào)對(duì)通信信號(hào)的干擾、無線能量傳輸功率下降以及不能夠全雙工通信等問題。本文結(jié)合重慶市科委應(yīng)用開發(fā)重點(diǎn)項(xiàng)目“復(fù)雜金屬環(huán)境下RFID系統(tǒng)關(guān)鍵技術(shù)與設(shè)計(jì)”,對(duì)無線能量傳輸技術(shù)以及能量與信息的同步傳輸技術(shù)進(jìn)行研究,針對(duì)某特殊動(dòng)態(tài)變化環(huán)境中的應(yīng)用,設(shè)計(jì)并實(shí)現(xiàn)了一套符合該項(xiàng)目要求的無線能量與信息同步傳輸系統(tǒng)。針對(duì)動(dòng)態(tài)環(huán)境下系統(tǒng)最佳諧振頻率出現(xiàn)偏離系統(tǒng)固有頻率的現(xiàn)象,本文利用Royer振蕩器具有自適應(yīng)跟蹤系統(tǒng)諧振頻率的能力,設(shè)計(jì)并實(shí)現(xiàn)了基于磁耦合諧振的無線能量發(fā)射電路。對(duì)傳統(tǒng)Royer電路的驅(qū)動(dòng)電路進(jìn)行了改進(jìn),提高了無線能量傳輸功率、效率,具有體積小、損耗低的特點(diǎn)。此外,通過采用逆變電源與驅(qū)動(dòng)電源分離的方案,發(fā)射機(jī)還可以較方便的增大無線能量傳輸功率,在大功率無線傳能應(yīng)用中優(yōu)勢(shì)更為明顯。為了實(shí)現(xiàn)能量與信息的同步傳輸,本文將能量信號(hào)作為通信載波進(jìn)行2FSK(Binary Frequency Shift Keying)調(diào)制,同時(shí)接收端設(shè)計(jì)了一種非常簡單的2FSK解調(diào)方案進(jìn)行解調(diào),成功的實(shí)現(xiàn)了下行通信的傳輸。針對(duì)2FSK調(diào)制引起無線能量傳輸功率下降的問題,設(shè)計(jì)了兩種雙諧振體方案來使諧振體在能量信號(hào)的兩個(gè)頻點(diǎn)均能保持諧振,從而有效的解決了此問題。在不增加額外通信信號(hào)傳輸通道的條件下,通過控制接收機(jī)的負(fù)載阻抗實(shí)現(xiàn)了上行通信的調(diào)制,并在發(fā)射機(jī)端通過檢測(cè)無線能量發(fā)射電路電流變化進(jìn)行解調(diào)。由于采用雙諧振體方案解決了2FSK調(diào)制導(dǎo)致無線能量傳輸功率下降的問題,使得下行通信并不干擾上行通信解調(diào),所以系統(tǒng)可以實(shí)現(xiàn)全雙工通信。最后對(duì)本文所設(shè)計(jì)的磁耦合諧振無線能量與信息同步傳輸系統(tǒng)進(jìn)行了實(shí)驗(yàn)驗(yàn)證與分析,實(shí)驗(yàn)結(jié)果表明該系統(tǒng)可以很好的完成預(yù)定指標(biāo)。
[Abstract]:Wireless Power transfer (WPT) technology can realize energy transmission without any physical contact. It is flexible and convenient and has wide application prospect in some mobile devices. In the fields of intelligent ammunition, human implantable devices, RFID (Radio Frequency Identification) and other fields, the transmission of energy also needs to transmit control commands and receive feedback information. The synchronous transmission of energy and information will face the interference of energy signals to the communication signals. The power of wireless energy transmission is reduced and the problem of full duplex communication is not possible. In this paper, the key technology and design of RFID system in complex metal environment are studied, and the technology of wireless energy transmission and synchronous transmission of energy and information are studied. Aiming at the application of a special dynamic environment, a wireless energy and information synchronous transmission system is designed and implemented. Aiming at the phenomenon that the optimal resonant frequency of the system deviates from the natural frequency of the system in dynamic environment, a wireless energy transmitting circuit based on magnetic coupling resonance is designed and implemented by using Royer oscillator with the ability to track the resonant frequency of the system adaptively. The driving circuit of the traditional Royer circuit is improved to improve the power and efficiency of wireless energy transmission. It has the characteristics of small size and low loss. In addition, by adopting the scheme of separating inverter and driving power, the transmitter can increase the wireless energy transmission power conveniently, which is more obvious in the application of high-power wireless energy transmission. In order to realize the synchronous transmission of energy and information, this paper uses the energy signal as a communication carrier to modulate 2FSK (binary Frequency shift keying). At the same time, a very simple 2FSK demodulation scheme is designed at the receiver, and the downlink communication is successfully transmitted. Aiming at the problem that 2FSK modulation leads to the decrease of wireless energy transmission power, two kinds of dual resonator schemes are designed to make the resonator hold resonance at both frequency points of the energy signal, thus effectively solving this problem. The uplink communication modulation is realized by controlling the load impedance of the receiver without adding additional communication signal transmission channels and demodulated by detecting the current change of the wireless energy transmitting circuit at the transmitter end. Because the dual-resonance scheme solves the problem that 2FSK modulation leads to the decrease of wireless energy transmission power, the downlink communication does not interfere with the uplink demodulation, so the system can realize full-duplex communication. Finally, the experimental verification and analysis of the magnetically coupled resonance wireless energy and information synchronous transmission system are carried out, and the experimental results show that the system can achieve the predetermined targets well.
【學(xué)位授予單位】：重慶大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：TM724

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