Research On Wireless Charging Technology Of Micro/Nano Sensing System

After MIT proposed the magnetic coupling resonant wireless power transfer(Wireless Power Transfer)technology in 2007,the wireless energy transfer technology has received widespread attention in recent years.It gets the advantages of being more flexible,safer and more reliable than wired power transmission.However,this magnetically coupled resonant wireless energy transfer technique relies on the strict alignment between the transceiver coils.Therefore,in order to bring it into practical application,an omnidirectional wireless energy transmission technology that can achieve stable and high efficiency is needed.This article will be hazardous industrial environment wireless monitoring system for the application of background.In view of the situation that traditional sensor nodes cannot be informed and charged safely when the battery is exhausted.Thus,a charging system based on Zig Bee and omnidirectional wireless power transmission is proposed.The system monitors the battery level of each wireless sensor node through Zig Bee wireless network and it sends the data to the embedded data processing center device,which implements intelligent warning according to the power information.Lastly,staff members accurately find the node according to the early warning information and it can be charged by the omnidirectional wireless charging equipment which provides power for the safety monitoring of the industrial environment.This article will focus on modeling and error analysis of omnidirectional wireless power transmission and complete the overall system design,wireless sensor node and network implementation,embedded data processing and performance analysis of the system wireless charging.In the laboratory environment,the paper tests the various modules of the wireless charging system for monitoring dangerous industrial environments.The experimental results show that the omnidirectional wireless power transmission module can achieve a maximum output power of 12 W.And the transmission efficiency of the system is 67%.When the sensor node's battery residual is lower than the set threshold,it realizes the warning of charging warning.When the charging module starts to work and the battery power does not change,it achieves the module failure alarm.When the battery power reaches 100 m Ah,the sensor node charging spent about 8 minutes.Therefore,this experiment proves that the wireless charging system carried by the UVA realizes timely and stable charging of low-power sensor nodes.Of course,this system needs further improvements to meet the needs of practical applications.