Design Of Wireless Charging System For Sensor Network Based On Smart Car

Wireless sensors play an important role in information perception and transmission.However,compared with traditional wired sensor networks,wireless sensors get rid of cable constraints and lose a stable source of power supply.The emergence of wireless rechargeable sensor networks has greatly extended the life of sensor networks.It uses wireless power transmission technology to extend the life cycle of wireless networks through wireless power transmission.Currently,there are more studies about the deployment and path planning of wireless rechargeable mobile devices However,the application of wireless sensors is more and more extensive,and the demand for power sources is increasing day by day.Therefore,the research on the charging power of wireless rechargeable sensor networks is of great significance.In order to solve the charging problem of wireless sensor network,this paper designs a wireless charging system for sensor network based on smart car.The system is mainly composed of a wireless charger and a smart car.The system uses a push-pull self-excited oscillation circuit to design a wireless charger that meets variable distance power transmission.The main function of the smart car is to supply power to the wireless charging coil and complete the coil alignment with the wireless charging coil.The system uses high-precision radar to scan the industrial site,and uses the Gmapping algorithm to construct a two-dimensional flat map.The smart car uses the slam function to navigate to the vicinity of the wireless sensor according to the constructed map.In order to find the label of the wireless charger receiving end more quickly and accurately,this paper uses threshold segmentation to judge each contour in the image,and obtains a pseudo ROI containing a circular contour,and then converts the pseudo ROI into an HSV color space image.After binarization,image morphology processing is performed to obtain the position of the label in the image.Then,the position of the red label in the image is converted into the relative position relationship between the smart car and the label in the space by using the imaging principle of the camera,and the internal parameters of the camera are calibrated by the Faugeras calibration method.Taking into account the particularity of the movement of the smart car,a method to determine the foot target of the smart car using a plane mirror is proposed to obtain the external parameters of the camera.After obtaining the internal and external parameters of the camera,the relative positional relationship between the smart car and the receiving end of the wireless charging coil is obtained.Use the obtained relative position relationship to move the smart car and approach the wireless charging coil to complete the charging of the wireless sensor.In order to ensure a more stable charging power,the SPP protocol is used to establish the communication relationship between the power detection module and the PC control terminal,and the charging power is fed back in real time.Combining the charging power with visual measurement technology to draw a power map containing the output power of the wireless charging coil corresponding to the smart car at each position,find the maximum power in the power map,and move the smart car to this position to get the maximum charge power.Finally,the charging power obtained by the two control strategies is compared,and it is proved that the two alignment strategies can complete the charging task,and the charging power obtained by the control strategy based on communication feedback is higher.In summary,the sensor network wireless charging system based on smart cars proposed in this paper can complete the task of charging wireless sensors and obtain stable charging power,thereby extending the life of the sensor network,improving the stability of the network,and has certain applications value.