Wireless charging coil guiding and aligning device and wireless charging coil guiding and aligning method for electric automobile

Abstract

The invention discloses a wireless charging coil guiding and aligning device and a wireless charging coil guiding and aligning method for an electric automobile. The wireless charging coil guiding andaligning device comprises a ground launching device, a vehicle-mounted receiving device, an image positioning system, a magnetic field excitation system and a magnetoresistive sensor group. The technical problem that it is easy to fail in an aligning operation of the electric automobile as guiding data can be acquired only by drawing the electric automobile close to a magnetic field excitation source in the related technology is solved by acquiring a precise position relationship between a launching coil and a receiving coil by way of image processing of a look-around camera when the electricautomobile is close to a parking spot or just enters into the parking spot and planning a travelling path to guide a driver or a parking system to align the coils. On the other hand, the magnetoresistive sensors are very high in sensitivity and detection precision, can provide high precision coordinate analysis within the acting distances of the magnetoresistive sensors, and finally align, examine and verify the coils, so that the coil aligning correctness and reliability of the coils are also improved.

Description

technical field [0001] The invention relates to the technical field of electric vehicle wireless charging, in particular to an electric vehicle wireless charging coil guiding and aligning device and an alignment method. Background technique [0002] When electric vehicles are wirelessly charged, it is necessary to align the receiving coil with the transmitting coil to ensure that the offset of the two coils is within the allowable range of the design value in order to achieve the best charging effect; for the convenience of the driver or the parking system, the vehicle can When parked within the allowable charging range, it is necessary to detect the relative position of the receiving coil and the transmitting coil when the electric vehicle carrying the receiving coil is at a certain distance from the transmitting coil, and guide the driver or the parking system to complete the receiving coil and the transmitting coil. the alignment; [0003] The existing wireless charging ...

AI Technical Summary

Problems solved by technology

[0007] In order to solve the above technical problems, the present invention provides a wireless charging coil guide alignment device and alignment method for electric vehicles. When the electric vehicle is approaching the parking space or just entering the parking space, the surrounding camera can capture the surrounding information of the electric vehicle. Panoramic overlooking the picture, the parking space is reconstructed by the image positioning system to establish a coordinate system based on image pixels, and the image pixel coordinates are converted into coordinates of the actual space according to the size of the marking line of the parking space, and then the relative relationship between the transmitting coil and the receiving coil is analyzed Position, plan the parking path, guide the driver or the parking system to align the coil, and then through the high-precision magnetoresistive sensor group, induce the magnetic field emitted by the transmitting coil, obtain the coil position coordinates based on the magnetic field model, and guide and confirm the position of the coil The final alignment process, with the alignment verification function, the intelligent alignment design greatly reduces the accuracy difference caused by manual operation, and greatly enhances the coil alignment effect

Images