水下无线供电数据传输系统设计

Design of Data Communication System for Underwater wireless Energy Transmission

摘要:

为了减轻水下自主航行器 (AUV) 在无线充电过程中不断变化的电池等效阻抗及海流冲击造成的互感变化对无线电能传输系统的传输功率及效率造成的影响，提出了一种基于无线供电的数据传输系统设计方案，实现初、次级侧通讯功能，形成无线电能传输过程的闭环控制，保证充电过程平稳、高效。系统使用dsPIC30f4012芯片产生变化频率的互补方波信号，驱动逆变器产生调制后的能量信号。此外综合考虑了能量传输和数据传输性能指标，对系统参数进行优化。在数据编码中加入了纠错和同步机制，提高传输准确率。完成了硬件实验平台的搭建，验证了系统可行性，并测试了不同条件下系统的性能指标。实验结果表明：系统在0dB信噪比时，可实现稳定0误码率数据传输，满足实际工作环境下的应用需求。

Abstract:

During the wireless charging process of autonomous underwater vehicle(AUV), the equivalent impedance of the battery changes continuously and the mutual inductance changes caused by the water impact, which seriously affects the transmission power and efficiency of the wireless energy transmission system. Therefore, a design scheme of data transmission system based on wireless power supply was proposed. The system achieves the communication function of the primary and secondary sides, forms a closed-loop control of the wireless energy transmission process to ensure a smooth and efficient charging process. System use the dsPIC30f4012 chip to generate a complementary square wave signal of varying frequency, driving the inverter to generate a modulated energy signal. In addition, the reliability of energy transmission and data transmission is considered comprehensively, and the system parameters are optimized. Error correction and synchronization mechanisms have been added to the data encoding to improve transmission accuracy. Completed the hardware experimental platform, verified the feasibility of the system, and tested the performance indicators of the system under different conditions. Experiment results indicate that the system symbol error rate maintains at stable 0% under the SNR of 0dB, which meets the practical application requirements.