基于磁耦合谐振的无线能量与信息同步传输系统设计与实现

发布时间：2018-07-04 21:12

本文选题：能量与信息同步传输 + Royer振荡　；参考：《重庆大学》2016年硕士论文

【摘要】：无线电能传输技术(Wireless Power Transfer,WPT)不需任何物理接触即可实现能量传输,具有灵活方便的特点,在一些移动设备供电中有着广泛应用前景。在智能弹药、人体植入式设备、传感器网络、RFID(Radio Frequency Identification)等领域,传输能量的同时还需要传输控制命令及接收反馈信息,能量与信息的同步传输会面临能量信号对通信信号的干扰、无线能量传输功率下降以及不能够全双工通信等问题。本文结合重庆市科委应用开发重点项目“复杂金属环境下RFID系统关键技术与设计”,对无线能量传输技术以及能量与信息的同步传输技术进行研究,针对某特殊动态变化环境中的应用,设计并实现了一套符合该项目要求的无线能量与信息同步传输系统。针对动态环境下系统最佳谐振频率出现偏离系统固有频率的现象,本文利用Royer振荡器具有自适应跟踪系统谐振频率的能力,设计并实现了基于磁耦合谐振的无线能量发射电路。对传统Royer电路的驱动电路进行了改进,提高了无线能量传输功率、效率,具有体积小、损耗低的特点。此外,通过采用逆变电源与驱动电源分离的方案,发射机还可以较方便的增大无线能量传输功率,在大功率无线传能应用中优势更为明显。为了实现能量与信息的同步传输,本文将能量信号作为通信载波进行2FSK(Binary Frequency Shift Keying)调制,同时接收端设计了一种非常简单的2FSK解调方案进行解调,成功的实现了下行通信的传输。针对2FSK调制引起无线能量传输功率下降的问题,设计了两种双谐振体方案来使谐振体在能量信号的两个频点均能保持谐振,从而有效的解决了此问题。在不增加额外通信信号传输通道的条件下,通过控制接收机的负载阻抗实现了上行通信的调制,并在发射机端通过检测无线能量发射电路电流变化进行解调。由于采用双谐振体方案解决了2FSK调制导致无线能量传输功率下降的问题,使得下行通信并不干扰上行通信解调,所以系统可以实现全双工通信。最后对本文所设计的磁耦合谐振无线能量与信息同步传输系统进行了实验验证与分析,实验结果表明该系统可以很好的完成预定指标。
[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.
【学位授予单位】：重庆大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TM724

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