Wireless charging positioning auxiliary detection system

Abstract

The invention provides a wireless charging positioning auxiliary detection system. The wireless charging positioning auxiliary detection system comprises a transverse correcting unit, wherein the transverse correcting unit comprises a left detection coil, a right detection coil, a first voltage sensor, a second voltage sensor, a threshold voltage source, a first voltage comparator, a second voltage comparator and a DSP microprocessor, the voltage signal of the right detection coil is collected through the first voltage sensor, then is transmitted to one input end of the first voltage comparator through a filter unit, the other input end of the first voltage comparator is connected with a threshold voltage source, and the output end of the first voltage comparator is connected with the DSPmicroprocessor through a signal conversion unit. According to the wireless charging positioning auxiliary detection system, the voltage values of the left detection coil and the right detection coil which are installed at the bottom of a vehicle are collected and compared with the threshold voltage to obtain a difference value, and then the difference value is converted into position information to realize transverse position correction.

Description

technical field [0001] The invention belongs to the technical field of dynamic wireless charging, and in particular relates to a positioning auxiliary detection system for wireless charging. Background technique [0002] The advantages of clean energy and no pollution of electric vehicles have been widely valued by governments of various countries. However, problems such as short battery life, poor battery life and long charging time limit the development of the electric vehicle industry. Therefore, some researchers have begun to explore other charging methods for electric vehicles. Since then, wireless power transfer technology has been applied to electric vehicle charging. [0003] Although the static wireless charging technology developed earlier can reduce the power battery capacity of electric vehicles to a certain extent, it still uses battery energy storage. Therefore, static charging technology cannot give full play to its advantages in electric vehicle charging due...

AI Technical Summary

Problems solved by technology

However, this solution currently has two main disadvantages. First, when the load coil of the vehicle and the source coil buried under the road are laterally misaligned, the received power and efficiency will also be reduced; the second is that the switching of the transmitter will cause Transmission power fluctuations affect the stability of the receiver

[0004] The traditional positioning method of electric vehicles includes using traditional general sensors such as infrared, laser, ultrasonic, RFID, etc., and detecting the position of the vehicle by sending signals from the signal transmitting device installed on the vehicle to the signal receiving device installed above each guide rail on the road surface. It is easier to say, but this type of sensor is more suitable for closed systems, such as rail transit, and it is very unsuitable for cars running on open roads, because the use of this type of sensor has many restrictions, such as signals usually cannot It is blocked and cannot work in a strong alternating electromagnetic field. The detection range is too close or too far, and the work is affected by the weather. In addition, it is necessary to modify the road surface and install many detection devices, which is neither reliable nor expensive.

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