CN-121984248-A - Control method, device, equipment and storage medium of wireless charging equipment

CN121984248ACN 121984248 ACN121984248 ACN 121984248ACN-121984248-A

Abstract

The application discloses a control method, a device, equipment and a storage medium of wireless charging equipment, and relates to the technical field of wireless charging. And when the wireless charging device is in a standby state, sending an excitation signal to the wireless charging coil, enabling the wireless charging coil to enter an oscillation state based on the excitation signal, then sampling the wireless charging coil, performing data processing on the sampled initial signal amplitude sequence to obtain current parameter values of a plurality of energy characteristic parameters, inputting the current parameter values of the plurality of energy characteristic parameters into a preset classifier to obtain a classification result, and judging whether a preset charging area of the wireless charging coil is provided with the device to be charged. The method and the device for judging whether the equipment to be charged exists or not can reduce the probability of misidentifying the metal as the equipment to be charged by the current parameter values of the energy characteristic parameters so as to avoid the wireless charging equipment from frequently entering the charging state due to metal foreign matters, and therefore, the method and the device for judging the equipment to be charged can reduce the resource loss.

Inventors

WU JINGXIU
LI YONGBO
JIANG ZHAOYAO
LIU HAO

Assignees

东莞市奥海科技股份有限公司

Dates

Publication Date: 20260505
Application Date: 20260109

Claims (10)

1. A control method of a wireless charging device, characterized in that the wireless charging device comprises a controller and a wireless charging coil; The method comprises the following steps: Periodically controlling the controller to send an excitation signal to the wireless charging coil to enable the wireless charging coil to oscillate under the condition that the wireless charging device is detected to be in a standby state; the controller is controlled to sample signals of the wireless charging coil, and an initial signal amplitude sequence is obtained; performing data processing on the initial signal amplitude sequence to obtain current parameter values of a plurality of energy characteristic parameters; inputting current parameter values of a plurality of energy characteristic parameters into a preset classifier to obtain a classification result; and controlling the wireless charging equipment to keep a standby state under the condition that the classification result is detected to indicate that the equipment to be charged is not detected.
2. The method of controlling a wireless charging device according to claim 1, wherein the plurality of energy characteristic parameters includes a logarithmic decay rate, a waveform energy sum, a frequency offset parameter, an amplitude ratio, and a root mean square parameter; The data processing is performed on the initial signal amplitude sequence to obtain current parameter values of a plurality of energy characteristic parameters, including: performing direct current offset removal processing on the initial signal amplitude sequence to obtain a target amplitude sequence; Calculating a current parameter value of the root mean square parameter and a current parameter value of the waveform energy sum based on the initial signal amplitude sequence; Calculating to obtain a zero-crossing average interval based on the target amplitude sequence, and calculating to obtain a current parameter value of the frequency offset parameter based on the zero-crossing average interval and a preset basic frequency; performing envelope extraction processing on the target amplitude sequence to obtain an envelope sequence; And calculating the current parameter value of the logarithmic decrement and the current parameter value of the amplitude ratio based on the envelope sequence.
3. The control method of the wireless charging device according to claim 2, wherein the wireless charging device comprises a first switching tube, a second switching tube and an excitation module, the first switching tube and the second switching tube are respectively connected with the controller, the first switching tube and the second switching tube are respectively connected with the excitation module, the first switching tube enables the excitation module to be connected with a first power supply voltage when being conducted, the second switching tube enables the excitation module to be connected with a second power supply voltage when being conducted, and the second power supply voltage is smaller than the first power supply voltage, and the first power supply voltage is used for supplying power to the wireless charging device in a charging state; the controlling the controller to send an excitation signal to the wireless charging coil to cause the wireless charging coil to oscillate, comprising: And controlling the second switching tube to be conducted in a preset time period through the controller, so that the excitation module is connected to the second power supply voltage, and sending the excitation signal which lasts for the preset time period to the wireless charging coil.
4. The control method of a wireless charging device according to claim 3, wherein after the current parameter values of the plurality of energy characteristic parameters are inputted to a preset classifier, the method comprises: and under the condition that the classification results of the continuous first preset number of periods all represent that the equipment to be charged is detected, controlling the wireless charging equipment to enter a charging state, and controlling the first switching tube to be conducted through the controller so that the excitation module is connected to the first power supply voltage to enable the wireless charging coil to be charged.
5. The method for controlling a wireless charging device according to claim 1, wherein the inputting the plurality of energy characteristic parameters into a preset classifier to obtain the classification result comprises: Acquiring a reference idle load average value and a reference idle load variance value corresponding to each energy characteristic parameter; based on the reference idle load average value and the reference idle load variance value, carrying out normalization processing on the current parameter values of the energy characteristic parameters to obtain normalized parameter values of each energy characteristic parameter; Under the condition that each normalized parameter value is detected to be in a corresponding preset threshold range, judging that the classification result represents that the equipment to be charged is detected, wherein the energy characteristic parameters are in one-to-one correspondence with the preset threshold ranges; And under the condition that any one of the normalized parameter values is detected to exceed the corresponding preset threshold range, judging that the classification result represents that the equipment to be charged is not detected.
6. The control method of the wireless charging apparatus according to claim 5, wherein the reference no-load average value and the reference no-load variance value are obtained by: under the condition that the wireless charging equipment is in an idle state, the controller is controlled to send excitation signals to the wireless charging coil for a plurality of times, and first idle parameter values of each energy characteristic parameter after each excitation signal is sent are collected to obtain a first idle data set, wherein each energy characteristic parameter corresponds to one first idle data set; Performing average value calculation based on the first idle data set to obtain the reference idle average value of the energy characteristic parameter; And carrying out variance calculation based on the first idle data set to obtain the reference idle variance value of the energy characteristic parameter.
7. The method according to claim 4, wherein after the current parameter values of the plurality of energy characteristic parameters are inputted to a preset classifier to obtain a classification result, comprising: Under the condition that the classification results of the continuous second preset number of periods all represent that the equipment to be charged is not detected, acquiring a second no-load parameter value of each energy characteristic parameter acquired in the second preset number of periods to acquire a second no-load data set, wherein each energy characteristic parameter corresponds to one second no-load data set; carrying out average value calculation based on the second idle data set to obtain a current idle average value of the energy characteristic parameters, and taking the current idle average value as the reference idle average value of the corresponding energy characteristic parameters; and carrying out variance calculation based on the second idle data set to obtain a current idle variance value of the energy characteristic parameter, and taking the current idle variance value as the reference idle variance value of the corresponding energy characteristic parameter.
8. A control device of a wireless charging device, characterized in that the wireless charging device comprises a controller and a wireless charging coil; The device comprises: an excitation control unit for periodically controlling the controller to send an excitation signal to the wireless charging coil to cause the wireless charging coil to oscillate when the wireless charging device is detected to be in a standby state; the sampling unit is used for controlling the controller to sample signals of the wireless charging coil to obtain an initial signal amplitude sequence; the data processing unit is used for carrying out data processing on the initial signal amplitude sequence to obtain current parameter values of a plurality of energy characteristic parameters; the classification detection unit is used for inputting the current parameter values of the energy characteristic parameters into a preset classifier to obtain a classification result; And the holding unit is used for controlling the wireless charging equipment to be in a standby state under the condition that the classification result is detected to indicate that the equipment to be charged is not detected.
9. A wireless charging device, characterized in that the wireless charging device comprises a memory storing a computer program and a processor implementing the control method of the wireless charging device according to any one of claims 1 to 7 when the computer program is executed by the processor.
10. A computer-readable storage medium storing a computer program, characterized in that the computer program, when executed by a processor, implements the control method of the wireless charging device according to any one of claims 1 to 7.

Description

Control method, device, equipment and storage medium of wireless charging equipment Technical Field The present application relates to the field of wireless charging technologies, and in particular, to a method, an apparatus, a device, and a storage medium for controlling a wireless charging device. Background The wireless charging equipment utilizes the principles of electromagnetic induction, magnetic resonance or radio waves and the like, converts electric energy into an energy field (such as an alternating magnetic field) in a specific form through a transmitting end, and converts the energy into electric energy after a receiving end coil senses energy change, so that the charging of equipment such as a mobile phone, an earphone, a smart watch and the like without a physical connecting wire is realized. With the development of technology, standby requirements for wireless charging devices are becoming lower and lower. The existing wireless charging equipment can automatically detect equipment to be charged, and after the equipment to be charged is detected, the equipment to be charged enters a charging state to charge the equipment to be charged. However, the existing wireless charging equipment is easy to identify the metal foreign matters as equipment to be charged and then enter a charging state, so that electric energy waste is caused. Disclosure of Invention The present application aims to solve at least one of the technical problems existing in the prior art. Therefore, the application provides a control method, a device, equipment and a storage medium of wireless charging equipment, which can accurately identify the equipment to be charged, avoid the wireless charging equipment from frequently entering a charging state due to metal foreign matters and reduce the resource loss. According to a control method of a wireless charging device of an embodiment of a first aspect of the present application, the wireless charging device includes a controller and a wireless charging coil; The method comprises the following steps: Periodically controlling the controller to send an excitation signal to the wireless charging coil to enable the wireless charging coil to oscillate under the condition that the wireless charging device is detected to be in a standby state; the controller is controlled to sample signals of the wireless charging coil, and an initial signal amplitude sequence is obtained; performing data processing on the initial signal amplitude sequence to obtain current parameter values of a plurality of energy characteristic parameters; inputting current parameter values of a plurality of energy characteristic parameters into a preset classifier to obtain a classification result; and controlling the wireless charging equipment to keep a standby state under the condition that the classification result is detected to indicate that the equipment to be charged is not detected. The control method of the wireless charging device has the advantages that when the wireless charging device is in a standby state, an excitation signal is periodically sent to the wireless charging coil through the controller, the wireless charging coil enters an oscillation state based on the excitation signal, then the wireless charging coil is sampled to obtain an initial signal amplitude sequence, the initial signal amplitude sequence is subjected to data processing to obtain current parameter values of a plurality of energy characteristic parameters, the current parameter values of the plurality of energy characteristic parameters are input into a preset classifier to obtain a classification result, and therefore whether the preset charging area of the wireless charging coil is provided with the device to be charged is judged. According to the application, whether the equipment to be charged exists or not is judged through the current parameter values of the energy characteristic parameters, the judgment is more accurate, the probability of mistakenly identifying the metal as the equipment to be charged can be reduced, and the wireless charging equipment is prevented from frequently entering a charging state due to metal foreign matters, so that the resource loss can be reduced. According to some embodiments of the first aspect of the application, the plurality of energy characteristic parameters includes a logarithmic decay rate, a waveform energy sum, a frequency offset parameter, an amplitude ratio, and a root mean square parameter; The data processing is performed on the initial signal amplitude sequence to obtain current parameter values of a plurality of energy characteristic parameters, including: performing direct current offset removal processing on the initial signal amplitude sequence to obtain a target amplitude sequence; Calculating a current parameter value of the root mean square parameter and a current parameter value of the waveform energy sum based on the initial signal amplitude sequence; Calculating to