CN112236921A

CN112236921A - Wireless charging device and method for adjusting position of transmitting coil

Info

Publication number: CN112236921A
Application number: CN201880094302.6A
Authority: CN
Inventors: 万世铭
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2018-04-12
Filing date: 2018-04-12
Publication date: 2021-01-15
Also published as: WO2019196070A1

Abstract

A wireless charging apparatus and a method of adjusting a position of a transmitting coil are provided. This wireless charging device includes: a transmitting coil for transmitting an electromagnetic signal; the processor is used for determining a movement parameter by means of picture recognition and controlling the position adjusting mechanism to adjust the position of the transmitting coil based on the movement parameter. In the embodiment of the application, the processor in the wireless charging device can determine the mobile parameters through a picture recognition mode, and further when the equipment to be charged utilizes the transmitting coil to perform wireless charging, the position adjusting structure arranged in the wireless charging device is controlled through the mobile parameters, the position of the transmitting coil is adjusted, the transmitting coil can be aligned to the receiving coil, the charging efficiency is improved, and further the user experience is improved.

Description

Wireless charging device and method for adjusting position of transmitting coil

Technical Field

The present application relates to the field of wireless charging, and more particularly, to a wireless charging device and a method of adjusting a position of a transmitting coil.

Background

Currently, in the technical field of charging, a device to be charged mainly adopts a wired charging mode for charging.

Taking a mobile phone as an example, when the mobile phone needs to be charged, the mobile phone may be connected to a power supply device through a charging cable (e.g., a Universal Serial Bus (USB) cable), and the output power of the power supply device is transmitted to the mobile phone through the charging cable to charge a battery in the mobile phone.

However, with the popularization of wireless charging, more and more electronic devices support functions such as wireless charging or wireless transmission, and wireless charging methods are becoming more and more popular. A transmitting coil for transmitting electromagnetic waves on the existing wireless charging base is basically fixed on the base, so that the position of the equipment to be charged needs to be accurately found when the equipment to be charged is placed on the base, and once the position is deviated, the charging efficiency is reduced, and the user experience is seriously influenced.

Disclosure of Invention

The wireless charging device and the method for adjusting the position of the transmitting coil are provided, so that the charging efficiency of wireless charging can be effectively improved, and further the user experience is improved.

In a first aspect, a wireless charging device is provided, including:

a transmitting coil for transmitting an electromagnetic signal;

the processor is used for determining a movement parameter by means of picture recognition and controlling the position adjusting mechanism to adjust the position of the transmitting coil based on the movement parameter.

In the embodiment of the application, the processor in the wireless charging device can determine the mobile parameter (namely the position of the receiving coil relative to the transmitting coil) through the picture recognition mode, and then when the device to be charged utilizes the transmitting coil to perform wireless charging, the position of the transmitting coil is adjusted by controlling the position adjusting structure arranged in the wireless charging device through the mobile parameter, so that the transmitting coil can be aligned to the receiving coil, the charging efficiency is improved, and the user experience is further improved.

In a second aspect, a method for adjusting a position of a transmitting coil is provided, and is applied to a wireless charging device, and the method includes:

transmitting an electromagnetic signal with a transmit coil in the wireless charging apparatus;

when the equipment to be charged wirelessly charges by using the electromagnetic signal, the mobile parameters are determined by using a picture recognition mode, and the position of the transmitting coil is adjusted based on the mobile parameters.

In a third aspect, a wireless charging system is provided, which includes a device to be charged and a wireless charging apparatus;

the device to be charged includes:

the receiving coil is used for receiving electromagnetic signals so as to wirelessly charge the equipment to be charged;

the wireless charging device includes:

a transmitting coil for transmitting the electromagnetic signal;

In this application, the processor among this wireless charging device passes through the mode of picture discernment, can the relative transmitting coil's of intelligent recognition receiving coil position, and then when treating that the battery charging outfit utilizes this transmitting coil to carry out wireless charging, through the position control structure that controls setting among this wireless charging device, adjusts this transmitting coil's position for this receiving coil is aimed at to this transmitting coil, in order to improve charge efficiency, and then promotes user experience.

Drawings

Fig. 1 is a diagram illustrating a configuration of a wireless charging system according to an embodiment of the present application.

Fig. 2 is a schematic block diagram of a device to be charged according to an embodiment of the present application.

Fig. 3 is another schematic block diagram of a device to be charged according to an embodiment of the present application.

Fig. 4 is a schematic block diagram of a wireless charging device according to an embodiment of the present application.

Fig. 5 is a diagram illustrating a configuration example of a charging system according to an embodiment of the present application.

Fig. 6 is a schematic diagram of a wireless charging device acquiring a first image according to an embodiment of the present application.

Fig. 7 is a schematic diagram of a structure of a wireless charging device according to an embodiment of the present application.

Fig. 8 is a schematic diagram of another structure of a wireless charging device according to an embodiment of the present application.

Fig. 9 is a schematic diagram of another structure of a wireless charging device according to an embodiment of the present application.

Fig. 10 is a schematic flow chart of a method of adjusting the position of a transmit coil according to an embodiment of the present application.

Detailed Description

The charging method and the charging device have the advantages that the charging device to be charged is charged based on the wireless charging technology, the wireless charging technology can complete power transmission without a cable, and operation in a charging preparation stage can be simplified.

The wireless charging technology needs to connect a power supply device (such as an adapter) with a wireless charging device (such as a wireless charging base), and transmit output power of the power supply device to a device to be charged in a wireless manner (such as electromagnetic signals or electromagnetic waves) through the wireless charging device, so as to wirelessly charge the device to be charged. According to different wireless charging principles, wireless charging methods can be classified into magnetic coupling (or electromagnetic induction), magnetic resonance, and radio wave. The wireless charging standards employed may include: QI standard, power physical alliance (PMA) standard, wireless power alliance (A4 WP). The QI standard and the PMA standard both adopt a magnetic coupling mode for wireless charging. The A4WP standard uses magnetic resonance for wireless charging.

The wireless charging method of the present application is described below with reference to fig. 1.

As shown in fig. 1, the wireless charging system includes a power supply device 110, a wireless charging apparatus 120, and a device to be charged 130, wherein the wireless charging apparatus 120 may be a wireless charging base, for example, and the device to be charged 130 may be a terminal, for example. The power supply device 110 includes, but is not limited to: adapter, alternating current power supply, portable power source or computer.

After the power supply device 110 is connected to the wireless charging apparatus 120, the output current of the power supply device 110 is transmitted to the wireless charging apparatus 120. The wireless charging apparatus 120 may convert the output current of the power supply device 110 into an electromagnetic signal (or electromagnetic wave) through the internal wireless transmitting circuit 121 and transmit the electromagnetic signal (or electromagnetic wave). For example, the wireless transmission circuit 121 may convert the output current of the power supply apparatus 110 into an alternating current, and convert the alternating current into an electromagnetic signal through the transmission coil 122 (or the transmission antenna).

In the embodiment of the present application, before the wireless charging, the wireless charging apparatus 120 and the device to be charged 130 negotiate the transmission power of the wireless transmission circuit 121 in advance. Assuming that the power negotiated between the wireless charging apparatus 120 and the device to be charged 130 is 5W, the output voltage and the output current of the wireless receiving circuit 131 are typically 5V and 1A. Assuming that the power negotiated between the wireless charging apparatus 120 and the device to be charged 130 is 10.8W, the output voltage and the output current of the wireless receiving circuit 131 are typically 9V and 1.2A.

In actual operation, the device to be charged 130 may receive the electromagnetic signal transmitted by the wireless transmitting circuit 121 through the wireless receiving circuit 131 and convert the electromagnetic signal into an output current of the wireless receiving circuit 131. For example, the wireless receiving circuit 131 may convert the electromagnetic signal transmitted by the wireless transmitting circuit 121 into an alternating current through the receiving coil 134 (or receiving antenna), and rectify and/or filter the alternating current to convert the alternating current into an output voltage and an output current of the wireless receiving circuit 131.

However, the output voltage of the wireless receiving circuit 131 is not suitable for being directly applied to the battery 133, but needs to be converted by the voltage management circuit 132 in the device to be charged 130 to obtain the charging voltage and/or charging current expected by the battery 133 in the device to be charged 130.

The voltage management circuit 132 may be used to transform (e.g., constant voltage and/or constant current control) the output voltage of the wireless receiving circuit 131 to meet the expected charging voltage and/or charging current requirement of the battery 133.

As an example, the voltage management circuit 132 may refer to a charging management module, such as an Integrated Circuit (IC). During charging of the battery 133, the voltage management circuit 132 may be used to manage a charging voltage and/or a charging current of the battery 133. The voltage management circuit 132 may include a voltage feedback function and/or a current feedback function, and further, the voltage management circuit 132 may include a voltage detection function and/or a current detection function. To enable management of the charging voltage and/or charging current of the battery 133.

For example, the charging process of the battery may include one or more of a trickle charge phase, a constant current charge phase, and a constant voltage charge phase. During the trickle charge phase, the voltage management circuit 132 may utilize a current feedback function such that the current entering the battery 133 during the trickle charge phase satisfies a charge current level (e.g., a first charge current) expected by the battery 133. During the constant current charging phase, the voltage management circuit 132 may utilize a current feedback function to make the current entering the battery 133 during the constant current charging phase satisfy the expected charging current level of the battery 133 (e.g., a second charging current, which may be greater than the first charging current). During the constant voltage charging phase, the voltage management circuit 132 may utilize the voltage feedback function to enable the magnitude of the voltage applied across the battery 133 during the constant voltage charging phase to satisfy the expected charging voltage magnitude of the battery 133.

As an example, when the output voltage of the wireless receiving circuit 131 is greater than the expected charging voltage of the battery 133, the voltage management circuit 132 may be configured to perform a voltage reduction process on the output voltage of the wireless receiving circuit 131, so that the charging voltage obtained after the voltage reduction conversion meets the expected charging voltage requirement of the battery 133.

As yet another example, when the output voltage of the wireless receiving circuit 131 is smaller than the expected charging voltage of the battery 133, the voltage management circuit 132 may be configured to perform a voltage boosting process on the output voltage of the wireless receiving circuit 131, so that the charging voltage obtained after the voltage boosting conversion meets the expected charging voltage requirement of the battery 133.

For example, taking the case that the wireless receiving circuit 131 outputs a 5V constant voltage as an example, when the battery 133 includes one battery cell (taking a lithium battery cell as an example, the charge cut-off voltage of one battery cell is generally 4.2V), the voltage management circuit 132 (e.g., a Buck voltage reduction circuit) may perform voltage reduction processing on the output voltage of the wireless receiving circuit 131, so that the charging voltage obtained after voltage reduction meets the charging voltage requirement expected by the battery 133.

For example, taking the case that the wireless receiving circuit 131 outputs a constant voltage of 5V as an example, when the battery 133 includes two or more cells connected in series with each other (taking a lithium battery cell as an example, the charge cut-off voltage of one cell is generally 4.2V), the voltage management circuit 132 (for example, a Boost circuit) may perform a boosting process on the output voltage of the wireless receiving circuit 131, so that the boosted charging voltage meets the charge voltage requirement expected by the battery 133.

It should be understood that the wireless charging system shown in fig. 1 is only an example, and some or all of the specific technical features involved in the drawing may be combined or separated in any suitable manner, even some of the specific technical features may be directly deleted to simplify the system, or specific technical features not shown in the drawing may be added to improve the system performance, and the present application is not limited in particular. For example, the voltage management circuit in fig. 1 may be divided into a voltage reduction circuit, a voltage boosting circuit, and a detection circuit. For another example, the voltage management circuit shown in fig. 1 is an optional circuit. For another example, the wireless charging system shown in fig. 1 may also be provided with a communication function.

Fig. 2 is a schematic block diagram of a wireless charging device according to an embodiment of the present application. Fig. 3 and 4 are schematic block diagrams of a device to be charged according to an embodiment of the present application. For convenience of understanding, the wireless charging apparatus and the device to be charged according to the embodiment of the present application are exemplarily described below with reference to fig. 2 to 4.

As shown in fig. 2, the wireless charging device 140 may include: a rectifying and filtering circuit (not shown), a voltage converting circuit 143 (e.g., a DC/DC converting circuit), a wireless transmitting circuit 141 including a transmitting coil 142, a first control circuit 142, and a first communication circuit 144. In the following, the voltage conversion circuit 143 is exemplified as a DC/DC conversion circuit.

The 214V ac power can be converted into a stable DC power by the rectifying and filtering circuit, and then the voltage is regulated to a fixed value by the conversion of the DC/DC conversion circuit to be supplied to the wireless transmission circuit 141.

It should be understood that the rectifying filter circuit and the DC/DC conversion circuit are optional, and as described above, when the power supply apparatus 100 is an alternating current power supply, the wireless charging device 140 may be provided with the rectifying filter circuit and the DC/DC conversion circuit. When the power supply apparatus 100 can supply a stable direct current, the rectifying filter circuit and/or the DC/DC conversion circuit can be eliminated.

And a wireless transmitting circuit 141 for converting the direct current supplied from the DC/DC conversion circuit or the direct current supplied from the power supply device into an alternating current that can be coupled to the transmitting coil, and converting the alternating current into an electromagnetic signal by the transmitting coil for transmission.

Optionally, in this embodiment of the present application, the wireless transmitting circuit 141 may include: an inverter circuit and a resonant circuit. The inverter circuit may include a plurality of switching tubes, and the magnitude of the output power may be adjusted by controlling the on-time (duty ratio) of the switching tubes. A resonant circuit for transferring electrical energy away, for example, may include a capacitor and a transmitting coil. By adjusting the resonant frequency of the resonant circuit, the magnitude of the output power of the wireless transmission circuit 141 can be adjusted.

Optionally, in the embodiment of the present application, the wireless charging apparatus 140 may be a wireless charging base or a device with an energy storage function. When the wireless charging apparatus 140 is a device having an energy storage function, it further includes an energy storage module (e.g., a lithium battery) that can obtain and store electric energy from an external power supply device. Thus, the energy storage module may provide power to the wireless transmission circuit 141. It should be understood that the wireless charging device 140 may obtain power from an external power supply apparatus by wire or wirelessly. The wired connection, for example, connects with an external power supply device through a charging interface (e.g., Type-C interface) to obtain power. For example, the wireless charging apparatus 140 includes a wireless receiving circuit, which can wirelessly receive power from a device having a wireless charging function.

The first control circuit 142 is configured to control the wireless charging process. For example, the first control circuit 142 may control the communication of the first communication circuit 144 with the power supply device to determine the output voltage and/or the output current of the power supply device. Alternatively, the first control circuit 142 may also control the communication of the first communication circuit 144 with the device to be charged, enable interaction of charging information (e.g., voltage information of a battery of the device to be charged, temperature information of the battery, charging mode information, etc.), determination of charging parameters (e.g., charging voltage and/or charging current) for wireless charging, and the like.

It should be understood that the wireless charging apparatus 140 may also include other related hardware, logic devices, circuits and/or code to achieve the corresponding functions. For example, the wireless charging device 140 may further include a display module (e.g., a light emitting diode or an LED display screen) for displaying the charging status in real time (e.g., charging is in progress or terminated, etc.) during the wireless charging process.

As shown in fig. 2, in an embodiment of the present application, the wireless charging device 140 may further include: a voltage conversion circuit 143. The voltage conversion circuit 143 is configured to perform voltage conversion on the current supplied to the wireless transmission circuit 141 when the voltage of the current supplied to the wireless transmission circuit 141 does not satisfy a preset condition. As previously mentioned, in one embodiment, the current provided to the wireless transmitting circuit 141 may be provided by a DC/DC conversion circuit, a power supply device, or the energy storage module described above.

Of course, alternatively, if the voltage supplied to the wireless transmission circuit 141 can reach the voltage requirement of the wireless transmission circuit 141 for the input voltage, the voltage conversion circuit 143 can be omitted to simplify the implementation of the wireless charging apparatus. The voltage requirement of the wireless transmission circuit 141 for the input voltage may be set according to actual requirements, for example, to 10V.

Alternatively, in the embodiment of the present application, the fact that the voltage of the current supplied to the wireless transmission circuit 141 cannot satisfy the preset condition means that the voltage is lower than the required voltage of the wireless transmission circuit 141 or the voltage is higher than the required voltage of the wireless transmission circuit 141. For example, if the wireless charging is performed in a charging mode with high voltage and low current (e.g., 14V/1A), the input voltage of the wireless transmitting circuit 141 is required to be higher (e.g., the voltage requirement is 10V or 14V). If the voltage supplied to wireless transmitting circuit 141 cannot meet the voltage requirement of wireless transmitting circuit 141, voltage converting circuit 143 may boost the input voltage to meet the voltage requirement of wireless transmitting circuit 141. If the output voltage of the power supply device exceeds the voltage requirement of the wireless transmission circuit 141, the voltage conversion circuit 143 may step down the input voltage to meet the voltage requirement of the wireless transmission circuit 141.

As shown in fig. 3 and 4, the device to be charged 150 may include: a wireless receiving circuit 151 including a receiving coil, a second control circuit 152, a voltage step-down circuit 153, a detection circuit 154, a battery 155, and a first charging path 156 and a second communication circuit 159.

Alternatively, in the embodiment of the present application, the wireless receiving circuit 151 is configured to convert the electromagnetic signal transmitted by the wireless transmitting circuit 141 of the wireless charging device 140 into an alternating current through the receiving coil 311, and perform rectification and/or filtering operations on the alternating current to convert the alternating current into a stable direct current to charge the battery 155.

Optionally, in this embodiment of the present application, the wireless receiving circuit 151 may include: a receiving coil and an AC/DC conversion circuit. And the AC/DC conversion circuit is used for converting the alternating current received by the receiving coil into direct current.

Alternatively, in the embodiment of the present application, the battery 155 may include a single battery cell or a plurality of battery cells. When the battery 155 comprises a plurality of cells, the plurality of cells are in a series relationship. Therefore, the charging voltage which can be borne by the battery 155 is the sum of the charging voltages which can be borne by the multiple battery cells, the charging speed can be increased, and the charging heat emission can be reduced.

Taking the device to be charged as a mobile phone as an example, when the battery 155 of the device to be charged includes a single battery cell, the voltage of the internal single battery cell is generally between 3.0V and 4.35V. And when the battery 155 of the device to be charged comprises two cells connected in series, the total voltage of the two cells connected in series is 6.0V-8.7V. Therefore, compared with a single battery cell, when multiple battery cells are connected in series, the output voltage of the wireless receiving circuit 151 can be increased. Compared with a single battery cell, the charging speed is equal, the charging current required by the multiple battery cells is about 1/N of the charging current required by the single battery cell, wherein N is the number of the battery cells which are connected in series in the equipment to be charged. In other words, on the premise of ensuring the same charging speed (the same charging power), the scheme of multiple battery cells is adopted, so that the magnitude of the charging current can be reduced, and the heat productivity of the equipment to be charged in the charging process is reduced. On the other hand, compared with the scheme of a single battery cell, under the condition that the charging current is kept the same, the scheme of serially connecting a plurality of battery cells is adopted, so that the charging voltage can be increased, and the charging speed is increased.

Optionally, in the present embodiment, the first charging channel 156 may be a wire. A voltage step-down circuit 153 may be provided on the first charging channel 156.

The voltage reducing circuit 153 is configured to reduce the dc power output by the wireless receiving circuit 151 to obtain an output voltage and an output current of the first charging channel 156. In an alternative embodiment, the voltage and current values of the dc power output by the first charging channel 156, which meet the charging requirements of the battery 155, can be directly applied to the battery 155. It should be understood that the provision of the voltage-decreasing circuit 153 on the first charging path is merely an example. For example, in other alternative embodiments, the voltage reducing circuit 153 may be replaced by a voltage increasing circuit, so that when the output voltage of the wireless receiving circuit 151 is smaller than the expected charging voltage of the battery 155, the voltage increasing circuit may be used to perform voltage increasing processing on the output voltage of the wireless receiving circuit 131, so that the charging voltage obtained after voltage increasing conversion meets the expected charging voltage requirement of the battery 155. The voltage boosting circuit and the voltage dropping circuit 153 may be integrated, for example, as the voltage management circuit 132 shown in fig. 1.

The detection circuit 154 is used for detecting the voltage value and/or the current value of the first charging channel 156. The voltage value and/or the current value of the first charging channel 156 may refer to a voltage value and/or a current value between the wireless receiving circuit 151 and the voltage dropping circuit 153, that is, an output voltage value and/or a current value of the wireless receiving circuit 151. Alternatively, the voltage value and/or the current value on the first charging channel 156 may also refer to the voltage value and/or the current value between the voltage-reducing circuit 153 and the battery 155, i.e., the output voltage and/or the output current of the voltage-reducing circuit 153.

Optionally, in this embodiment of the present application, the detection circuit 154 may include: a voltage detection circuit and a current detection circuit. The voltage detection circuit may be configured to sample the voltage on the first charging channel 156 and send the sampled voltage value to the second control circuit 152. In an alternative embodiment, the voltage detection circuit may sample the voltage on the first charging channel 156 by serial voltage division. The current detection circuit 154 may be configured to sample the current on the first charging channel 156 and send the sampled current value to the second control circuit 152. In some embodiments, the current sense circuit 154 may sample the current on the first charging channel 156 via a galvanometer or a current sense resistor.

Alternatively, in the embodiment of the present application, the second control circuit 152 may control the second communication circuit 159 to communicate with the wireless charging device, and feed back the voltage value and/or the current value detected by the detection circuit 154 to the wireless charging device. Thus, the first control circuit 142 of the wireless charging device can adjust the transmission power of the wireless transmission circuit 141 according to the feedback voltage value and/or current value, so that the voltage value and/or current value of the direct current output by the first charging channel 156 matches with the charging voltage value and/or current value required by the battery 155.

It should be understood that in the embodiment of the present application, "matching with the required charging voltage value and/or current value of the battery 155" includes: the voltage value and/or the current value of the dc power output by the first charging channel 156 is equal to or within a predetermined range (e.g., 100 mv to 140 mv above and below) of the charging voltage value and/or the charging current value required by the battery 155.

In the embodiments of the present application, the voltage dropping circuit 153 may be implemented in various forms. As one example, the voltage-reducing circuit 153 may be a Buck circuit. As another example, the voltage-reducing circuit 153 may be a charge pump (charge pump). The charge pump is composed of a plurality of switching devices, and the heat generated when the current flows through the switching devices is very small and almost equal to the heat generated when the current directly passes through a wire, so that the charge pump is adopted as the voltage reduction circuit 153, which not only can play a role in reducing the voltage, but also has low heat generation. The voltage step-down circuit 153 may also be a half-voltage circuit, as one example.

Optionally, in this embodiment of the present application, the setting of the voltage-boosting multiple of the voltage converting circuit 143 of the wireless charging apparatus 140 and the voltage-reducing multiple of the voltage-reducing circuit 153 of the device to be charged 150 is related to parameters such as an output voltage that can be provided by the power supply device and a charging voltage that is required by the battery 155, and the two may be equal or unequal, which is not specifically limited in this embodiment of the present application.

Alternatively, in the embodiment of the present application, the voltage boosting multiple of the voltage conversion circuit 143 and the voltage reducing multiple of the voltage reducing circuit 153 may be set to be equal. For example, the voltage conversion circuit 143 may be a booster circuit for boosting the output voltage of the power supply device by 2 times; the voltage-decreasing circuit 153 may be a half-voltage circuit for decreasing the output voltage of the wireless receiving circuit 151 by half.

Optionally, in this embodiment of the application, the voltage boosting multiple of the voltage converting circuit 143 and the voltage reducing multiple of the voltage reducing circuit 153 are set to be 1:1, and this setting manner may enable the output voltage and the output current of the voltage reducing circuit 153 to be respectively consistent with the output voltage and the output current of the power supply device, which is beneficial to simplifying the implementation of the control circuit. Taking the requirement of the battery 155 for the charging current as 5A as an example, when the second control circuit 152 knows that the output current of the voltage-reducing circuit 153 is 4.5A through the detection circuit 154, the output power of the power supply device needs to be adjusted so that the output current of the voltage-reducing circuit 153 reaches 5A. If the ratio of the voltage-boosting multiple of the voltage converting circuit 143 to the voltage-reducing multiple of the voltage-reducing circuit 153 is not equal to 1:1, the first control circuit 142 or the second control circuit 152 needs to recalculate the adjustment value of the output power of the power supply apparatus based on the difference between the current output current of the voltage-reducing circuit 153 and the desired value when adjusting the output power of the power supply apparatus. In the embodiment of the present application, the voltage-boosting multiple of the voltage converting circuit 143 and the voltage-reducing multiple of the voltage-reducing circuit 153 are set to 1:1, and the second control circuit 152 notifies the first control circuit 142 to boost the output current to 5A, thereby simplifying the feedback adjustment manner of the wireless charging path.

As shown in fig. 4, in the embodiment of the present application, the device to be charged 150 may further include: a second charging channel 158. The second charging channel 158 may be a wire. The second charging channel 158 may be provided with a conversion circuit 157 for performing voltage control on the dc power output by the wireless receiving circuit 151 to obtain an output voltage and an output current of the second charging channel 158, so as to charge the battery 155.

Optionally, in this embodiment of the present application, the conversion circuit 157 may include: the circuit is used for realizing voltage stabilization and the circuit is used for realizing constant current and constant voltage. Among them, a circuit for stabilizing voltage is connected to the wireless receiving circuit 151, and a circuit for implementing constant current and constant voltage is connected to the battery 155.

When the second charging channel 158 is used to charge the battery 155, the wireless transmitting circuit 141 may use a constant transmitting power, and after the wireless receiving circuit 151 receives the electromagnetic signal, the electromagnetic signal is processed by the converting circuit 157 into a voltage and a current meeting the charging requirement of the battery 155, and then the voltage and the current are input to the battery 155 to charge the battery 155. It should be understood that in some embodiments, a constant transmit power need not be a transmit power that remains completely constant, and may vary within a range, for example, a transmit power of 7.5W floating up or down by 0.5W.

Optionally, in the embodiment of the present application, when the battery 155 is charged through the second charging channel 158, the wireless charging device and the device to be charged may be wirelessly charged according to the Qi standard.

Optionally, in the embodiment of the present application, the voltage conversion circuit 143 is provided in the wireless charging device 140. A first charging channel 156 (e.g., a wire) connected to the battery 155 is provided at the device to be charged. The first charging channel 156 is provided with a voltage reduction circuit 153 for reducing the output voltage of the wireless receiving circuit 151, so that the output voltage and the output current of the first charging channel 156 meet the charging requirement of the battery 155.

Alternatively, in the embodiment of the present application, if the wireless charging apparatus 140 charges the single battery cell 155 in the device to be charged with the output power of 20W, and charges the single battery cell 155 with the second charging channel 158, the input voltage of the wireless transmitting circuit 141 needs to be 5V, the input current needs to be 4A, and the use of the current of 4A inevitably causes the coil to generate heat, thereby reducing the charging efficiency.

When the single-cell battery 155 is charged by using the first charging path 156, since the voltage-reducing circuit 153 is disposed on the first charging path 156, the input voltage of the wireless transmitting circuit 141 can be increased without changing the transmitting power of the wireless transmitting circuit 141 (14W described above), and thus the input current of the wireless transmitting circuit 141 can be reduced.

Alternatively, in the embodiment of the present application, the voltage dropping circuit 153 may adopt a half-voltage circuit, that is, the ratio of the input voltage and the output voltage of the voltage dropping circuit 153 is fixed to be 2:1, so as to further reduce the heat generation of the voltage dropping circuit 153.

It is understood that the wireless receiving circuit 151 may intermittently charge the battery 155, and the period of the output current of the wireless receiving circuit 151 may vary with the frequency of the ac power input to the wireless charging system, such as the ac power grid, for example, the period of the output current of the wireless receiving circuit 151 corresponds to a frequency that is a multiple of the grid frequency. Also, when the output current of the wireless receiving circuit 151 may intermittently charge the battery 155, the current waveform corresponding to the output current of the wireless receiving circuit 151 may be one or a set of pulses synchronized with the power grid. Compared with constant direct current, the pulse voltage/current periodic transformation can reduce the lithium precipitation phenomenon of the lithium battery, prolong the service life of the battery, and is beneficial to reducing the polarization effect of the battery, improving the charging speed and reducing the heat generation of the battery, thereby ensuring the safety and reliability of the equipment to be charged during charging.

Alternatively, in the present embodiment, the wireless charging device 140 may be provided in various shapes, for example, a circle, a square, and the like.

Optionally, in the embodiment of the present application, many other communication information may also be exchanged between the first communication circuit 144 and the second communication circuit 159. In some embodiments, information for safety protection, abnormality detection, or fault handling, such as temperature information of the battery 155, information indicating an overvoltage protection or overcurrent protection, and power transfer efficiency information (which may be used to indicate power transfer efficiency between the wireless transmitting circuit 141 and the wireless receiving circuit 151) may be exchanged between the first communication circuit 144 and the second communication circuit 159.

For example, when the temperature of the battery 155 is too high, the first control circuit 142 and/or the second control circuit 152 may control the charging loop to enter a protection state, such as controlling the charging loop to stop wireless charging. For another example, after the first control circuit 142 receives the indication information of the over-voltage protection or the over-current protection sent by the second control circuit 152 through the second communication circuit 159, the first control circuit 142 may reduce the transmission power or control the wireless transmission circuit 141 to stop operating. As another example, after the first control circuit 142 receives the power transmission efficiency information sent by the second control circuit 152 through the second communication circuit 159, if the power transmission efficiency is lower than the preset threshold, the wireless transmission circuit 141 may be controlled to stop working, and the user may be notified of the event, for example, the power transmission efficiency is too low through the display screen, or the power transmission efficiency may be indicated by the indicator lamp, so that the user can adjust the environment of the wireless charging.

Optionally, in the embodiment of the present application, other information that can be used to adjust the transmission power adjustment of the wireless transmission circuit 141, such as temperature information of the battery 155, information indicating a peak value or an average value of the voltage and/or current on the first charging channel 156, power transfer efficiency information (which can be used to indicate the power transfer efficiency between the wireless transmission circuit 141 and the wireless reception circuit 151), and the like, may be interacted between the first communication circuit 144 and the second communication circuit 159.

For example, the second communication circuit 159 may transmit power transfer efficiency information to the first communication circuit 144, and the first control circuit 142 may determine the adjustment magnitude of the transmission power of the wireless transmission circuit 141 based on the power transfer efficiency information received by the first communication circuit 144. Specifically, if the power transfer efficiency information indicates that the power transfer efficiency between wireless transmission circuit 141 and wireless reception circuit 151 is low, first control circuit 142 may increase the adjustment amplitude of the transmission power of wireless transmission circuit 141 so that the transmission power of wireless transmission circuit 141 quickly reaches the target power.

As another example, if the wireless receiving circuit 151 outputs a voltage and/or a current with a pulsating waveform, the second control circuit 152 may send information indicating a peak value or an average value of the output voltage and/or the output current of the first charging channel 156 to the first control circuit 142, the first control circuit 142 may determine whether the peak value or the average value of the output voltage and/or the output current of the first charging channel 156 matches a charging voltage and/or a charging current currently required by the battery 155, and if the peak value or the average value of the output current does not match the charging voltage and/or the charging current currently required by the battery 155, the transmitting power of the wireless transmitting circuit 141 may be adjusted.

As another example, the second communication circuit 159 may send temperature information of the battery 155 to the first communication circuit 144, and if the temperature of the battery 155 is too high, the first control circuit 142 may decrease the transmission power of the wireless transmission circuit 141 to decrease the output current of the wireless reception circuit 151, thereby decreasing the temperature of the battery 155.

However, in the wireless charging system framework shown in fig. 1, the transmitting coil 122 for transmitting electromagnetic waves on the wireless charging device 120 is substantially fixed on the base, which results in that the position of the device to be charged 130 needs to be accurately found when being placed on the wireless charging device 120, and once the position deviates, the charging efficiency is reduced, thereby seriously affecting the user experience.

In order to solve the above problem, an embodiment of the present application provides a wireless charging system. The position of the transmitting coil in the wireless charging device in the wireless charging system has adjustability, so that when equipment to be charged in the wireless charging system is placed on the wireless charging device, the position of the transmitting coil in the wireless charging device can be adjusted, and the receiving coil in the equipment to be charged is aligned, so that the charging efficiency is improved, and the user experience is further improved.

The wireless charging system 200 provided in the embodiment of the present application is described below with reference to fig. 5.

As shown in fig. 5, a wireless charging system 200 provided in this application may include a wireless charging apparatus 220 and a device to be charged 210.

The wireless charging apparatus 220 may include:

a transmitting coil 221 for transmitting an electromagnetic signal.

A processor 223 and a position adjusting mechanism 222, wherein the processor 223 is configured to determine a movement parameter by means of picture recognition, and control the position adjusting mechanism 222 to adjust the position of the transmitting coil 221 based on the movement parameter, so that the transmitting coil 221 can be aligned with the receiving coil 212 of the device to be charged 210. Here, the position adjustment mechanism 222 may be understood as a mechanical structure for adjusting the position of the transmitting coil 221 in the wireless charging device 220. The transmitting coil 221 may be the transmitting coil 122 shown in fig. 1, or the wireless transmitting circuit 121 shown in fig. 1, and the receiving coil 212 may be the receiving coil 134 or the wireless receiving circuit 131 shown in fig. 1. The wireless charging apparatus 220 may further include a power supply device (not shown), and the device to be charged 210 may further include a transforming circuit (not shown) of the battery 1 for connecting the receiving coil 212 to the battery 211.

In this embodiment, the processor 223 in the wireless charging device 220 can intelligently identify the relative position of the transmitting coil 221 with respect to the receiving coil 212, and then when the device to be charged 210 is wirelessly charged by using the transmitting coil 221, based on the relative position of the transmitting coil 221 with respect to the receiving coil 212, the processor 223 controls the position adjusting structure provided in the wireless charging device 220 to adjust the position of the transmitting coil 221, so that the transmitting coil 221 is aligned with the receiving coil 212, and the charging efficiency is improved. In addition, in the embodiment of the present application, data transmission may also be performed between the wireless charging apparatus 220 and the device to be charged 210. In some embodiments, the wireless communication between the wireless charging apparatus 220 and the device to be charged 210 may be unidirectional wireless communication. For example, in the wireless charging process, the device to be charged 210 may be defined as an initiator of communication, and the wireless charging apparatus 220 may be defined as a receiver of communication. In other alternative embodiments, the wireless communication between the wireless charging apparatus 220 and the device to be charged 210 may be bidirectional wireless communication. Two-way wireless communication generally requires a receiving party to send response information to an initiator after receiving a communication request initiated by the initiator, and a two-way communication mechanism can make a communication process safer. That is, wireless charging system 200 of this application embodiment not only can intelligent recognition device position, and rethread mechanical system aligns wireless coil and equipment coil, can improve charge efficiency, and then promotes user experience.

As used in the embodiments of the present application, the device to be charged 210 may refer to a terminal, which may include, but are not limited to, devices configured to receive/transmit communication signals via a wireline connection (e.g., via a Public Switched Telephone Network (PSTN), a Digital Subscriber Line (DSL), a digital cable, a direct cable connection, and/or another data connection/network) and/or via a wireless interface (e.g., for a cellular network, a Wireless Local Area Network (WLAN), a digital television network such as a digital video broadcasting-handheld (DVB-H) network, a satellite network, an AM-FM (amplitude modulation-frequency modulation) broadcast transmitter, and/or another communication terminal). Terminals that are arranged to communicate over a wireless interface may be referred to as "wireless communication terminals", "wireless terminals", and/or "mobile terminals". Examples of mobile terminals include, but are not limited to, satellite or cellular telephones; personal Communication System (PCS) terminals that may combine a cellular radiotelephone with data processing, facsimile and data communication capabilities; personal Digital Assistants (PDAs) that may include radiotelephones, pagers, internet/intranet access, Web browsers, notepads, calendars, and/or Global Positioning System (GPS) receivers; and conventional laptop and/or palmtop receivers or other electronic devices that include a radiotelephone transceiver. In addition, the device to be charged or the terminal used in the embodiment of the present application may further include a mobile power supply (power bank), which is capable of receiving the charge of the wireless charging device, so as to store energy for providing energy for other electronic devices.

In addition, the wireless charging device is a wireless charging base. Further, the wireless charging apparatus is connected to a power supply device. The power supply device is an adapter, an alternating current power supply, a mobile power supply or a computer.

In one embodiment, the wireless charging apparatus may further include:

the base contact surface, one side of this base contact surface is used for placing the equipment of waiting to charge. Optionally, the base contact surface is circular or square. The processor determines a movement parameter by means of picture recognition, and controls the position adjusting mechanism to adjust the position of the transmitting coil based on the movement parameter. Specifically, in a possible implementation manner, the processor first acquires a first image, where the first image is an image acquired through the base contact surface, the first image may include an image of a device to be charged, and the image of the device to be charged may include an identification pattern, and a position of the identification pattern is used to indicate a position of the receiving coil; then, the processor generates a coordinate system based on the first image, forms a second image, and determines a first coordinate of the receiving coil in the second image based on the coordinate of the identification pattern in the second image; finally, the processor determines the movement parameter based on the first coordinate, and controls the position adjustment mechanism to adjust the position of the transmitting coil based on the movement parameter, so that a second coordinate of the transmitting coil in the second image coincides with the first coordinate. In some embodiments, the identification pattern may include at least one of: a corner identification pattern of the device to be charged and a trademark identification pattern of the device to be charged. It should be understood that the above-mentioned identification pattern is merely an exemplary illustration, and in other alternative embodiments, an identification pattern dedicated to indicating the position of the receiving coil may be engraved on the device to be charged.

Further, the wireless charging device may further include an image capture device, whereby the processor may acquire the first image with the image capture device. One side of the base contact surface is used for placing equipment to be charged, the image acquisition device is positioned on the other side of the base contact surface, and the base contact surface is made of transparent materials. The image acquisition device has an interval from the other side of the base contact surface, so that the image acquisition device can acquire the complete base contact surface. In the embodiment of the present application, an image capturing device is taken as an example. For example, as shown in fig. 6, the camera 230 in the wireless charging apparatus captures a base contact surface 240 to acquire a first image, the base contact surface 240 is placed with the device 250 to be charged, and any one 251 of the four corners of the device 250 to be charged may be used as the above-mentioned identification pattern, and/or the trademark identification 252 on the charging device 250 may also be used as the above-mentioned identification pattern, and the position of the transmitting coil 253 in the first image (i.e., the coordinate position of the transmitting coil 253 on the second image) is determined by the positional relationship between at least one of the any one 251 of the four corners of the device 250 to be charged and the trademark identification 252 and the transmitting coil 253.

In adjusting the position of the transmitting coil, the processor may perform image analysis on the first image after acquiring the first image before forming a second image based on the first image generation coordinate system, generate a second image after determining the position of the marker pattern in the first image, and determine the coordinates of the marker pattern in the second image. The processor may also perform image analysis on a second image after forming the second image based on the first image generation coordinate system, and determine the coordinates of the identification pattern in the second image.

The following provides an exemplary description of an analysis method for a first image in the embodiments of the present application.

As an example, the processor may perform an Image Binarization (Image Binarization) process on the first Image.

In digital image processing, many systems are configured by binary image processing. Therefore, the image is processed by the binarization method, so that the applicability is strong, and the method is favorable for the collection property of the image only related to the positions of the points with the pixel points of which the values are 0 or 255 when the image is further processed, and does not relate to the multi-level values of the pixels, so that the processing is simple, and the processing and compression amount of data is small. In this embodiment, the processor may perform Image Binarization (Image Binarization) processing on the first Image, acquire a binary Image of the first Image, calculate a horizontal gradient response value and a vertical gradient response value of the binary Image, and determine the position of the identification pattern. Specifically, all pixels with a gray level greater than or equal to the threshold may be determined as belonging to a specific object (i.e., the above identification pattern), and the gray level thereof is represented by 255, otherwise, these pixels are excluded from the object region, and the gray level is 0, which represents the background or the exceptional object region. It has been found that if a particular object has a uniform gray level value inside it (e.g. the trademark logo pattern above) and is in a uniform background with gray levels of other levels (e.g. the trademark logo is in the back cover background of a mobile phone), a better segmentation result can be obtained by using the threshold method.

As yet another example, the processor may also perform a Hough Transform (Hough Transform) process on the first image.

The Hough transform is a feature extraction technique in image processing, which detects an object having a specific shape by a voting algorithm. In the embodiment of the application, a line in the first image may be detected by using classical hough transform, that is, a peripheral line of the device to be charged in the first image may be detected, and then the corner identification pattern in the second image is determined according to the intersection position of the lines. In addition, the hough transform can be further extended to the recognition of objects with arbitrary shapes, such as trademark identification patterns. In implementation, the Hough transformation process involves a transformation between two coordinate spaces. Specifically, a curve or a straight line having the same shape in one coordinate space is mapped to a point in another coordinate space to form a peak, thereby converting the problem of detecting an arbitrary shape into a statistical peak problem. In the embodiment of the present application, the position of the identification pattern in the first image may be determined by using a hough transform pair.

As yet another example, the processor may also analyze the first image by a Sobel operator.

The Sobel operator is one of operators in image processing, and in the embodiment of the application, edge detection can be performed on the first image through the Sobel operator. Technically, it is a discrete difference operator used to approximate the gradient of the first image intensity function. Using this operator at any point in the first image will produce the corresponding gradient vector or its normal vector.

The Sobel operator refers to terms including:

edge: the first image can be segmented by using the characteristics of the abrupt change of information such as gray scale or structure.

It will be appreciated by those skilled in the art that the edges of objects appear as discontinuities in the local characteristics of the image. For example, abrupt changes in gray value, abrupt changes in color, abrupt changes in texture, etc. Essentially, an edge means the end of one region and the beginning of another region. The edge information of the image is very important in image analysis and human vision, and is an important attribute for extracting image features in image recognition.

In addition, the edge of the image has two characteristics of direction and amplitude, the pixel change along the edge is gentle, and the pixel change perpendicular to the edge is severe. This variation may be present as a jump type, a roof type and a flange type. These changes correspond to different physical states in the scene, respectively. For example, a jump-type change often corresponds to the depth of an image or a reflective boundary, while the latter two often reflect discontinuities in the surface normal direction of the image. It is noted that the image to be analyzed is often complex and needs to be analyzed according to the actual situation.

Edge points: a point in the image having coordinates x, y and at a location of significant intensity variation.

Edge section: the orientation of the edge may be a gradient angle, corresponding to the edge point coordinates x, y and its orientation.

In the implementation process, after the Sobel operator calculates the gradient values G (x, y) at all pixel points in the first image, a threshold value T is selected, and if G (x, y) > T at (x, y), the point is considered to be an edge point or an edge segment. In addition, the Sobel operator only needs to adopt the brightness value projection in 2 directions, namely horizontal gradient response and vertical gradient response, so that the edge detection is simple in calculation and high in speed. In the embodiment of the application, the identification pattern of the embodiment of the application can be analyzed by performing Sobel contour extraction and threshold segmentation on the first image, so as to establish a coordinate system to form the second image and determine the coordinate of the identification pattern in the second image. It should be understood that the Sobel operator is only an exemplary illustration of the embodiment of the present application, and the embodiment of the present application is not limited thereto, and for example, a Robert (Robert) operator, a pruitt (Prewitt) operator, a Laplacian of Gaussian (LOG) operator, and the like may also be used.

In other embodiments, in order to further improve the accuracy of image processing, the original image may be subjected to "binarization" processing by means of threshold segmentation before the image is detected. Namely, the gray level image is binarized to obtain a binary image, and image detection is performed on the basis of the binary image.

In addition, in the embodiment of the present application, the size of the device to be charged in the second image does not strictly correspond to the actual size of the device to be charged. That is, the size of the captured image and the actual size of the device to be charged may be in a scaling relationship. Thus, in order to accurately determine the coordinates of the identification pattern in the second image. In an optional embodiment, the processor determines the first coordinates of the receiving coil in the second image based on the coordinates of the identification pattern in the second image, including: the processor determines the first coordinate according to the coordinate of the identification pattern in the second image, the position relation between the identification pattern and the receiving coil in the device to be charged and a first scaling ratio, wherein the first scaling ratio is the scaling ratio of the device to be charged in the second image.

Further, in this embodiment, the second image may further include an image of the transmitting coil, so that the processor may determine the second coordinate of the image of the transmitting coil in the second image and determine the movement parameter according to the first coordinate and the second coordinate.

In addition, since in the embodiment of the present application, the distance between the transmitting coil and the receiving coil calculated by the processor on the coordinate system of the second image is not necessarily the actual distance, in order to further improve the accuracy of the movement parameter, optionally, the processor may determine the first parameter according to the first coordinate and the second coordinate, and then determine the movement parameter according to the first parameter and a second scaling ratio, where the second scaling ratio is a scaling ratio of the base contact surface of the wireless charging device in the second image.

In this embodiment, after the processor determines the movement parameter, the processor may control the position adjustment mechanism in the wireless charging device to adjust the position of the transmitting coil in the wireless charging device based on the movement parameter.

The following is an exemplary description of the structure of the wireless charging device and the operating principle of adjusting the transmitting coil according to the embodiment of the present application:

in some embodiments, the position adjustment mechanism may include:

a stepping motor (stepping motor) connected to the position adjusting mechanism for providing power to the position adjusting mechanism. The stepper motor may be an open loop control assembly that converts electrical pulse signals into angular or linear displacements. In the case of a non-overload, the rotational speed of the stepper motor, the position of the stop, depends only on the frequency and the number of pulses of the pulse signal, and is not influenced by the load change, i.e. a pulse signal is applied to the stepper motor, which in turn rotates through a step angle. The existence of the linear relation and the characteristic that the stepping motor only has periodic error and no accumulated error and the like are added. The stepping motor is very simple to control in the control fields of speed, position and the like.

The stepping motor in the embodiment of the application can be a single-phase stepping motor or a multi-phase stepping motor.

The single-phase stepping motor can be provided with single-path electric pulse drive, and the output power meets the mechanical structure capable of driving the position adjusting device. A multi-phase stepper motor may be configured with a multi-phase square wave pulse drive. When a multi-phase stepping motor is used, a single-path electric pulse signal can be converted into a multi-phase pulse signal through a pulse distributor, and the multi-phase pulse signal is respectively sent to each winding of the stepping motor after being amplified by power. Each time a pulse is input to the pulse distributor, the energization state of each phase of the stepping motor changes, and the rotor rotates through a certain angle (called a step angle). Ideally, the rotation angle of the stepping motor is in direct proportion to the input pulse number, and when the pulse with a certain frequency is continuously input, the rotation speed of the motor keeps a strict corresponding relation with the frequency of the input pulse, and is not influenced by voltage fluctuation and load change.

In addition, the stepping motor drives the position adjusting mechanism to adjust the position of the transmitting coil, which is only an example, and in other alternative embodiments, other types of motors or driving components may be used to drive the position adjusting mechanism to adjust the position of the transmitting coil. Such as an electric motor.

In some embodiments, the wireless charging apparatus may further include:

and a first adjusting mechanism for adjusting the position of the transmitting coil in a first direction, the stepping motor being connected to the transmitting coil through the first adjusting mechanism. Therefore, the processor can determine a first distance based on picture recognition, generate a pulse signal based on the first distance, send the pulse signal to the stepping motor, and control the first adjusting mechanism to adjust the position of the transmitting coil by driving the stepping motor, so that the transmitting coil moves the first distance in the first direction. It should be understood that the first direction referred to herein may be any direction. The embodiments of the present application are not particularly limited. As an alternative embodiment, the first direction may be a direction in which a straight line is located, for example, the first direction may be a transverse direction or a longitudinal direction of the device to be charged, for example, a transverse direction or a longitudinal direction of the wireless charging apparatus, and the like. In other alternative embodiments, the first direction may be a circle with a point as the center or a direction along an arc length.

Further, the wireless charging apparatus may further include:

a second adjustment mechanism;

the stepping motor is connected to the first adjusting mechanism through the second adjusting mechanism and is used for adjusting the position of the transmitting coil in the second direction, and further, the position of the transmitting coil is adjusted through adjusting the position of the first adjusting mechanism. Therefore, the processor can determine a second distance based on picture recognition, generate a pulse signal based on the second distance, send the pulse signal to the stepping motor, and control the second adjusting mechanism to adjust the position of the transmitting coil by driving the stepping motor, so that the transmitting coil moves the second distance in the second direction. Wherein the first direction and the second direction are different. As an alternative embodiment, there is an angle between the first direction and said second direction, e.g. the first direction and the second direction are perpendicular.

Therefore, the processor drives the stepping motor, the stepping motor drives the first adjusting mechanism and/or the second adjusting mechanism, the position of the transmitting coil in the wireless charging device is adjusted in the first direction and/or the second direction, and then the receiving coil in the equipment to be charged is aligned, so that the charging efficiency is improved, and the user experience is improved.

In some embodiments, the first adjustment mechanism is used to adjust the position of the transmit coil in a linear direction.

In an implementation manner, on a plane where a base contact surface of the wireless charging device is located, when a projection of a center point of a gear of the stepping motor is taken as a circle center, and a projection of the center point of the transmitting coil and a projection of the center point of the receiving coil are not on the same circle, the processor is configured to determine the first distance. In addition, in the plane where the base contact surface is located, the first direction is a direction in which the projection of the center point of the gear of the stepping motor is taken as a center of a circle, and the projection of the transmitting coil moves in a direction close to the projection direction of the center point of the receiving coil on a radius of the projection passing through the center point of the transmitting coil. In addition, in the plane where the base contact surface is located, the first distance is a vertical distance between a circumference where the projection of the center point of the transmission coil is located and a circumference where the projection of the center point of the reception coil is located, with the projection of the center point of the gear of the stepping motor as a center of a circle.

The triggering condition for determining the first distance by the processor, the first distance, and the first direction in this embodiment are merely exemplary illustrations, and this embodiment is not limited in this application. For example, when a connection line between the projection of the center point of the transmitting coil and the projection of the center point of the receiving coil on the plane of the base contact surface is not parallel to a predetermined straight line, the processor may be configured to determine the first distance. Wherein, the direction of the preset straight line is the longitudinal direction or the transverse direction of the base contact surface. Further, in a plane where the base contact surface is located, the first direction is a direction parallel to the preset straight line, in which a projection direction of the projection of the transmitting coil is close to a center point of the receiving coil. Furthermore, in a plane where the base contact surface is located, the first distance is a distance between a projection of a center point of the transmitting coil and a projection of a center point of the receiving coil in a direction parallel to the preset straight line. Likewise, the use of the first adjustment mechanism for adjusting the position of the transmit coil in a certain linear direction is merely exemplary, and in other alternative embodiments, the first adjustment mechanism may also be used for adjusting the position of the transmit coil in a certain curvilinear direction.

In some embodiments, the second adjustment mechanism is configured to adjust the position of the transmit coil in a second direction different from the first direction, and likewise, the second direction may be a linear direction, and the second direction may also be a curvilinear direction.

Taking the second direction as a curved direction as an example, in an achievable manner, the processor is configured to determine the second distance when a projection of a center point of the gear of the stepping motor, a projection of a center point of the transmitting coil, and a projection of a center point of the receiving coil are not on the same straight line on a plane on which the base contact surface is located. In addition, in the plane where the contact surface of the base is located, the second direction is a direction in which the projection of the center point of the stepping motor is taken as a center of a circle, and on the circumference of the transmitting coil, the transmitting coil moves in a direction close to the projection of the center point of the receiving coil. In addition, in the plane where the contact surface of the base is located, the second distance is an arc length corresponding to a central angle, the central angle is an included angle formed by taking the projection of the central point of the gear of the stepping motor as a circle center and the radius of the projection passing through the central point of the transmitting coil and the radius of the projection passing through the central point of the receiving coil.

Taking the second direction as a straight line direction as an example, in an implementation manner, on a plane where the base contact surface is located, when a connection line between the projection of the center point of the transmitting coil and the projection of the center point of the receiving coil is not perpendicular to the preset straight line, the second distance is determined. In addition, in the plane where the base contact surface is located, the second direction is a direction perpendicular to the preset straight line, in which the projection direction of the projection of the transmitting coil is close to the center point of the receiving coil. In addition, in the plane where the base contact surface is located, the second distance is a distance between a projection of the center point of the transmitting coil and a projection of the center point of the receiving coil in a direction perpendicular to the preset straight line.

It should be appreciated that the above-described triggering condition involving the processor determining the second distance, and the second direction are merely examples. In other alternative embodiments, the processor may determine that the position of the transmit coil needs to be adjusted in other ways, and then trigger the first adjustment mechanism and/or the second adjustment mechanism to adjust the position of the transmit coil. Furthermore, it is noted that the first and second directions referred to above are based on mechanical structures in the position adjustment mechanism by the processor, in other words, if the first adjustment mechanism is used to move the transmitter coil in a straight line, a mechanical structure for moving the transmitter coil in a straight line is provided in the first adjustment mechanism, and similarly, if the second adjustment mechanism is used to move the transmitter coil in a curved line, a mechanical structure for moving the transmitter coil in a curved line needs to be provided in the second adjustment mechanism.

In the embodiment of the application, the processor determines the movement parameter by using a picture recognition mode, drives the stepping motor based on the movement parameter, and controls the position adjusting mechanism to adjust the position of the transmitting coil by the stepping motor.

The stepping motor is specifically used for driving the first adjusting mechanism and/or the second adjusting mechanism to adjust the position of the transmitting coil. In one embodiment, the wireless charging device may include two wireless motors, i.e., the first and second adjustment mechanisms are each configured with one stepping motor. In other embodiments, the wireless charging device may also include only one step motor, and the processor drives and controls the step motor to drive the first adjusting mechanism or the second adjusting mechanism to adjust the position of the transmitting coil. For example, the processor may drive the one stepping motor to drive the one gear to rotate, so as to drive the first adjusting mechanism to adjust the position of the transmitting coil, and the processor may drive the one stepping motor to drive the other gear to rotate, so as to drive the second adjusting mechanism to adjust the position of the transmitting coil.

Further, in the case where the position adjustment mechanism includes the first adjustment mechanism and the second adjustment mechanism, since the movement parameter includes the first direction, the first distance, the second direction, and the second distance. Thus, in one implementation, the processor also needs to determine whether to adjust the position of the transmit coil first via the first adjustment mechanism or first via the second adjustment mechanism before driving the stepper motor. In one implementation, the processor determines the first distance and controls the transmit coil to move linearly in the first direction the first distance using the first adjustment mechanism; the processor then determines the second distance and controls the transmit coil to move the second distance in the second direction using the second adjustment mechanism. In another implementable manner, the processor determines the second distance and controls the transmit coil to move the second distance in the second direction using the second adjustment mechanism; the processor then determines the first distance and controls the transmit coil to move linearly in the first direction the first distance using the first adjustment mechanism.

The first adjustment mechanism and the second adjustment mechanism of the embodiment of the present application will be described in detail below with reference to fig. 7 to 9:

fig. 7 is a schematic configuration diagram of a first adjustment mechanism for linearly adjusting the position of the transmitting coil and a second adjustment mechanism for circumferentially adjusting the position of the transmitting coil.

As shown in fig. 7, the first adjustment mechanism may include:

a first guiding rail 323, wherein one end of the first guiding rail 323 is close to the stepping motor 310, and the other end of the first guiding rail 323 is close to a certain peripheral position of the wireless charging device, and the first guiding rail 323 is used for supporting the transmitting coil 330 and guiding the transmitting coil 330 to move along the first direction. Further, the transmitting coil 330 may be disposed on the first guide rail 323 by a first slider 331.

Optionally, in a plane of the base contact surface, a radius of an inscribed circle of the base contact surface is equal to a length of the first guide rail 323, and a center of the inscribed circle coincides with a projection of a center point of the stepping motor 310. Accordingly, one end of the first guide rail 323 can be fixed to the center point of the stepping motor 310, and the other end of the first guide rail 323 can be moved, so that the transmitting coil 330 positioned on the first guide rail can be moved circumferentially. In the embodiment of the present application, the first guiding rail 323 is only used as an example, and in other embodiments, the first guiding rail 323 may also be fixedly disposed relative to the wireless charging device.

As shown in fig. 7, the first adjustment mechanism may further include:

a first gear shaft 321 and a first pull wire 322, wherein when the processor controls the first adjusting mechanism to adjust the position of the transmitting coil 330, the gear of the stepping motor 310 is engaged with the gear of the first gear shaft 321, and the shaft of the first gear shaft 321 is connected to one end of the transmitting coil 330 through the first pull wire 322. That is, when the processor controls the first adjusting mechanism to adjust the position of the transmitting coil 330, the stepping motor 310 drives the first gear shaft 321 to rotate, and the first gear shaft 321 drives the transmitting coil 330 via the first pulling wire 322 to move on the first guiding rail 323.

As shown in fig. 7, the first adjustment mechanism may further include:

a first spring 324 and a first fixed end 314, wherein the first fixed end 314 is disposed at the other end of the first guide rail 323, and the first fixed end 314 is connected to the transmitting coil 330 through the first spring 324. It should be understood that the first spring 324 is taken as an example, and in other embodiments, the first spring 324 can be replaced by any connecting member with elasticity. Such as rubber bands, etc.

As shown in fig. 7, the second adjustment mechanism may include:

a second gear shaft 311, a second pulling wire 312 and a first pulley 313, wherein when the processor controls the second adjusting mechanism to adjust the position of the transmitting coil 330, the gear of the stepping motor 310 is engaged with the gear of the second gear shaft 311, the shaft of the second gear shaft 311 is connected to one end of the second pulling wire 312, the other end of the second pulling wire 312 is connected to the first fixing end 314 through the first pulley 313, and further, the first fixing end 314 is located at one end of the first guide rail 323 close to the periphery of the wireless charging device. Similarly, when the second adjusting mechanism adjusts the position of the transmitting coil 330, the stepping motor 310 drives the second gear shaft 311 to rotate, and the second gear shaft 311 drives the first guide rail 323 through the second pull wire 312, so as to drive the transmitting coil 330 on the first guide rail 323 to move circumferentially.

As shown in fig. 7, the second adjustment mechanism may further include:

a second spring 315 and a second fixed end 316, wherein the first pulley 313 and the second fixed end 316 are respectively located at both sides of the first fixed end 314, and the first fixed end 314 is connected to the second fixed end 316 through the second spring 315. Similarly, in other embodiments, the second spring 315 may be replaced by any type of elastic connection. Such as rubber bands, etc.

As shown in fig. 7, the second adjustment mechanism may include:

a first channel 317, wherein the first channel 317 is configured to receive the second pull wire 312 and/or the second spring 315. Further, the first channel 317 may also be in the form of a rail. Or the first channel may be a plurality of pulleys defining the path of the second pull wire 312 and/or the second spring 315.

The position adjustment mechanism shown in fig. 7 is exemplified by one end of the first guide rail 323 moving circumferentially with the other end of the first guide rail 323 as a circular point, but the embodiment of the present application is not limited thereto, and in other embodiments, the first adjustment mechanism and the second adjustment mechanism may have other mechanical structures as long as the transmitter coils can be moved in two directions that are not parallel to each other. For example, the first and second adjustment mechanisms may each be provided with a guide rail. For another example, the first adjustment mechanism is used for linearly adjusting the position of the transmitting coil in a first direction, and the second adjustment mechanism is used for linearly adjusting the position of the transmitting coil in a second direction perpendicular to the first direction.

Fig. 8 is a schematic configuration diagram of a first adjustment mechanism for linearly adjusting the position of the transmitting coil in a first direction, and a second adjustment mechanism for linearly adjusting the position of the transmitting coil in a second direction perpendicular to the first direction.

As shown in fig. 8, the first adjustment mechanism may include:

a third rail 423, wherein the third rail 423 is disposed transversely or longitudinally through the wireless charging device, one end of the third rail 423 is connected to the stepping motor 410, and the third rail 423 is used for supporting the transmitting coil 430 and guiding the transmitting coil 430 to move along the first direction. Further, the transmitting coil 430 may be disposed on the third rail 423 through the second slider 426. Optionally, the length of the base contact surface in the longitudinal direction or the transverse direction is equal to the length of the third rail 423. As shown in fig. 8, the first adjustment mechanism may further include: a third gear shaft 421 and a third pull wire 422, wherein when the processor controls the first adjusting mechanism to adjust the position of the transmitting coil 430, the gear of the stepping motor 410 is engaged with the gear of the third gear shaft 421, and the shaft of the third gear shaft 421 is connected to one end of the transmitting coil 430 through the third pull wire 422. As shown in fig. 8, the first adjustment mechanism may further include: a third spring 424 and a third fixed end 425, wherein the third fixed end 425 is disposed at the other end of the third rail 423, and the third fixed end 425 is connected to the transmitting coil 430 through the third spring 424.

As shown in fig. 8, the second adjustment mechanism may include:

a fourth gear shaft 411, a fourth pulling wire 412, a second pulley 413 and a fourth guiding rail 414, wherein when the processor controls the second adjusting mechanism to adjust the position of the transmitting coil 430, the gear of the stepping motor 410 is meshed with the gear of the fourth gear shaft 411, the shaft of the fourth gear shaft 411 is connected with one end of the fourth pulling wire 412, the other end of the fourth pulling wire 412 is vertically connected to the third guiding rail 423 through the second pulley 413, so that the third guiding rail 423 moves on the fourth guiding rail 414, and the transmitting coil 430 on the third guiding rail 423 is indirectly moved. As shown in fig. 8, the second adjustment mechanism may further include: a fourth spring 415 and a fourth fixed end 416, wherein the second pulley 413 and the fourth fixed end 416 are respectively located at both sides of the third rail 423, and the third rail 423 is connected to the fourth fixed end 416 by the fourth spring 415.

Fig. 7 and 8 illustrate an example in which the transmitter coil moves on the guide rail of the first adjusting structure when moving in the first direction, and the transmitter coil indirectly moves the transmitter coil by moving the guide rail of the first adjusting structure when moving in the second direction, but the embodiment of the present invention is not limited thereto. For example, in other alternative embodiments, the transmitter coil may be disposed on multiple rails in multiple directions, and when the transmitter coil needs to be moved, only the corresponding rail needs to be moved. For example, as shown in fig. 9, the third rail 423 and the fourth rail 414 are nested by a connector 427 such that the third rail 423 can move on the fourth rail 414 and the fourth rail 414 can move on the third rail 423, and the transmitting coil 423 is disposed on the connector 427.

The device embodiment of the present application is described in detail above, and the method embodiment of the present application is described in detail below with reference to fig. 8, and the method embodiment and the device-side embodiment may correspond to each other, so that the parts that are not described in detail may be referred to the previous device embodiments.

Fig. 10 is a schematic flow chart of a wireless charging method provided in one embodiment of the present application. The method may be applied to a wireless charging device, such as may be described above. The method of fig. 10 includes steps S510-S530.

In step S510, the processor transmits an electromagnetic signal using a transmitting coil in the wireless charging apparatus.

In step S520, the processor determines the movement parameter by using a picture recognition method when the device to be charged performs wireless charging by using the electromagnetic signal.

In step S520, the processor adjusts the position of the transmitting coil based on the movement parameter so that the transmitting coil is aligned with the receiving coil of the device to be charged.

Alternatively, steps S520 and S530 may include: placing the equipment to be charged on a base contact surface of the wireless charging device, and wirelessly charging the equipment to be charged by utilizing the electromagnetic signal; acquiring a first image, wherein the first image is an image acquired through the base contact surface, the first image comprises an image of the device to be charged, the image of the device to be charged comprises a mark pattern, and the position of the mark pattern is used for indicating the position of the receiving coil; generating a coordinate system based on the first image to form a second image; determining first coordinates of the receiving coil in the second image based on coordinates of the identification pattern in the second image; determining the movement parameter based on the first coordinate; and controlling the position adjusting mechanism to adjust the position of the transmitting coil based on the movement parameter so that a second coordinate of the transmitting coil in the second image is coincident with the first coordinate.

Optionally, the identification pattern comprises at least one of: the corner identification pattern of the device to be charged and the trademark identification pattern of the device to be charged.

Alternatively, step S520 may include: and determining the first coordinate according to the coordinate of the identification pattern in the second image, the position relation between the identification pattern and the receiving coil in the equipment to be charged and a first scaling ratio, wherein the first scaling ratio is the scaling ratio of the equipment to be charged in the second image.

Optionally, the second image further includes an image of the transmitting coil, and step S520 may include: determining the second coordinates of the image of the transmit coil in the second image; and determining the movement parameter according to the first coordinate and the second coordinate.

Alternatively, step S520 may include: determining a first parameter according to the first coordinate and the second coordinate; the movement parameter is determined according to the first parameter and a second scaling ratio, wherein the second scaling ratio is the scaling ratio of the base contact surface of the wireless charging device in the second image.

Alternatively, step S520 may include: the first image is acquired by an image acquisition device.

Optionally, one side of the base contact surface is used for placing the device to be charged, the image acquisition device is located on the other side of the base contact surface, and the base contact surface is made of a transparent material.

Optionally, the image capturing device is spaced apart from the other side of the base contact surface such that the image capturing device captures the entire base contact surface.

Optionally, the base contact surface of the wireless charging device is circular or square.

Optionally, the method of fig. 10 may further include: the position of the transmitting coil is adjusted by the power provided by the stepping motor.

Alternatively, steps S520 and S530 may include: determining a first distance; adjusting a position of the transmit coil such that the transmit coil moves the first distance in the first direction.

Alternatively, step S520 may include: and determining the first distance when the projection of the central point of the transmitting coil and the projection of the central point of the receiving coil are not in the same circle by taking the projection of the central point of the gear of the stepping motor as the center of a circle on the plane where the contact surface of the base is located.

Optionally, in a plane where the base contact surface is located, the first direction is a direction in which a projection of a center point of the gear of the stepping motor is taken as a center of a circle and passes through a radius of a projection of a center point of the transmitting coil, and the transmitting coil moves in a circumferential direction where the projection of the center point of the transmitting coil is close to the receiving coil.

Optionally, in a plane where the base contact surface is located, the first distance is a vertical distance between a circumference where a projection of a center point of the gear of the stepping motor is located and a circumference where a projection of a center point of the transmitting coil is located, where the projection of a center point of the transmitting coil is located, and a circumference where a projection of a center point of the receiving coil is located.

Alternatively, step S520 may include: and determining the first distance when a connection line of the projection of the central point of the transmitting coil and the projection of the central point of the receiving coil is not parallel to a preset straight line on a plane where the base contact surface is located.

Optionally, the direction of the predetermined straight line is a longitudinal direction or a transverse direction of the base contact surface.

Optionally, in a plane where the base contact surface is located, the first direction is a direction parallel to the preset straight line, where a projection direction of the projection of the transmitting coil is close to a center point of the receiving coil.

Optionally, in a plane where the base contact surface is located, the first distance is a distance between a projection of a center point of the transmitting coil and a projection of a center point of the receiving coil in a direction parallel to the preset straight line.

Alternatively, step S530 may include: and controlling the transmitting coil to linearly move the first distance in the first direction by using a first guide rail, wherein one end of the first guide rail is close to the stepping motor, the other end of the first guide rail is close to a certain peripheral position of the wireless charging device, and the first guide rail is used for placing the transmitting coil.

Optionally, the length of the base contact surface in the longitudinal direction or the transverse direction is equal to the length of the first rail.

Optionally, in a plane where the base contact surface is located, a radius of an inscribed circle of the base contact surface is equal to the length of the first guide rail, and a center of the inscribed circle is a projection of a center point of the stepping motor.

Alternatively, step S530 may include: and controlling the transmitting coil to linearly move the first distance in the first direction by using a gear of the stepping motor, a first gear shaft and a first traction wire, wherein the gear of the stepping motor is meshed with the gear of the first gear shaft, and a shaft part of the first gear shaft is connected to one end of the transmitting coil through the first traction wire.

Optionally, the method of fig. 10 may further include: and resetting the transmitting coil by using a first spring and a first fixed end part, wherein the first fixed end part is arranged at the other end of the first guide rail, and the first fixed end part is connected to the transmitting coil through the first spring.

Alternatively, steps S520 and S530 may include: determining a second distance; adjusting a position of the transmit coil such that the transmit coil moves the second distance in the second direction, the first direction and the second direction being different.

Optionally, the first direction and the second direction are perpendicular.

Alternatively, step S520 may include: and when the projection of the central point of the gear of the stepping motor, the projection of the central point of the transmitting coil and the projection of the central point of the receiving coil are not on the same straight line on the plane where the contact surface of the base is located, the processor is used for determining the second distance.

Optionally, in a plane where the base contact surface is located, the second direction is a direction in which a projection of a center point of the stepping motor is taken as a center of a circle, and on a circumference of the transmitting coil, the transmitting coil moves in a direction of the projection of the center point of the receiving coil.

Optionally, in a plane where the base contact surface is located, the second distance is an arc length to which a central angle is opposite, and the central angle is an included angle formed by taking a projection of a central point of the gear of the stepping motor as a center of a circle and a radius of a projection passing through the central point of the transmitting coil and a radius of a projection passing through the central point of the receiving coil.

Alternatively, step S520 may include: and determining the second distance when a connection line of the projection of the central point of the transmitting coil and the projection of the central point of the receiving coil is not perpendicular to the preset straight line on the plane where the base contact surface is located.

Optionally, in a plane where the base contact surface is located, the second direction is a direction perpendicular to the preset straight line, where a projection direction of the projection of the transmitting coil is close to a center point of the receiving coil.

Optionally, in a plane where the base contact surface is located, the second distance is a distance between a projection of a center point of the transmitting coil and a projection of a center point of the receiving coil in a direction perpendicular to the preset straight line.

Alternatively, step S530 may include: and adjusting the position of the transmitting coil by using a second gear shaft, a second traction wire and a first pulley to enable the transmitting coil to move the second distance in the second direction, wherein the gear of the stepping motor is meshed with the gear of the second gear shaft, the shaft part of the second gear shaft is connected with one end of the second traction wire, and the other end of the second traction wire is connected to the first fixed end part through the first pulley.

Optionally, the method of fig. 10 may further include: and restoring the first guide rail by using a second spring and a second fixed end part, wherein the first pulley and the second fixed end part are respectively positioned at two sides of the first fixed end part, and the first fixed end part is connected to the second fixed end part through the second spring.

Optionally, the second pull wire and/or the second spring is received within a first channel in the wireless charging device.

Alternatively, steps S520 and S530 may include: determining the first distance and controlling the transmitting coil to move linearly in the first direction by the first distance; the second distance is determined and the transmitting coil is controlled to move the second distance in the second direction.

Alternatively, steps S520 and S530 may include: determining the second distance and controlling the transmitting coil to move the second distance in the second direction; the first distance is determined and the transmitting coil is controlled to move linearly in the first direction by the first distance.

Optionally, the wireless charging device is a wireless charging base.

Optionally, the wireless charging apparatus is connected to a power supply device.

Optionally, the power supply device is an adapter, an ac power supply, a mobile power supply or a computer.

In the above embodiments, all or part of the implementation may be realized by software, hardware, firmware or any other combination. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website, computer, server, or data center to another website, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device including one or more available media integrated servers, data centers, and the like. The usable medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a Digital Video Disk (DVD)), or a semiconductor medium (e.g., a Solid State Disk (SSD)), among others.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions when actually implementing, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not implemented. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The device and the equipment mentioned in the present application can be a chip system, and can also be a device or equipment with a shell.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the scheme in the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

A wireless charging device, comprising:

a transmitting coil for transmitting an electromagnetic signal;

the processor is used for determining a movement parameter by means of picture recognition and controlling the position adjusting mechanism to adjust the position of the transmitting coil based on the movement parameter.
The wireless charging apparatus of claim 1, further comprising:

a base contact surface;

one side of the base contact surface is used for placing the equipment to be charged;

the processor is used for determining a movement parameter by means of picture recognition and controlling the position adjusting mechanism to adjust the position of the transmitting coil based on the movement parameter, and the method comprises the following steps:

the processor is configured to:

acquiring a first image, wherein the first image is an image acquired through the base contact surface, the first image comprises an image of the device to be charged, the image of the device to be charged comprises an identification pattern, and the position of the identification pattern is used for indicating the position of a receiving coil in the device to be charged;

generating a coordinate system based on the first image, and forming a second image;

determining first coordinates of the receiving coil in the second image based on coordinates of the identification pattern in the second image;

determining the movement parameter based on the first coordinates;

controlling the position adjustment mechanism to adjust the position of the transmitting coil based on the movement parameter so that a second coordinate of the transmitting coil in the second image coincides with the first coordinate.
The wireless charging apparatus of claim 2, wherein the identification pattern comprises at least one of: the corner identification pattern of the device to be charged and the trademark identification pattern of the device to be charged.
The wireless charging apparatus of claim 2 or 3, wherein the processor is configured to determine the first coordinates of the receiving coil in the second image based on the coordinates of the identification pattern in the second image, comprising:

the processor is configured to determine the first coordinate according to the coordinate of the identification pattern in the second image, the position relationship between the identification pattern and the receiving coil in the device to be charged, and a first scaling ratio, where the first scaling ratio is a scaling ratio of the device to be charged in the second image.
The wireless charging apparatus of any of claims 2 to 4, wherein the second image further comprises an image of the transmit coil, the processor to determine the movement parameter based on the first coordinate comprising:

the processor is configured to determine the second coordinates of the image of the transmit coil in the second image and determine the movement parameter based on the first coordinates and the second coordinates.
The wireless charging apparatus of claim 5, wherein the processor is configured to determine the movement parameter according to the first coordinate and the second coordinate, comprising:

the processor is configured to determine a first parameter according to the first coordinate and the second coordinate, and determine the movement parameter according to the first parameter and a second scaling ratio, where the second scaling ratio is a scaling ratio of a base contact surface of the wireless charging device in the second image.
The wireless charging device of any one of claims 2 to 6, further comprising an image capture device, the processor configured to acquire a first image, comprising:

the processor is configured to: and acquiring the first image by using an image acquisition device.
The wireless charging device of claim 7, wherein one side of the base contact surface is used for placing the device to be charged, the image capturing device is located on the other side of the base contact surface, and the base contact surface is made of a transparent material.
The wireless charging device of claim 7 or 8, wherein the image capture device is spaced from the other side of the base contact surface such that the image capture device can capture the entire base contact surface.
The wireless charging device of any one of claims 1 to 9, wherein the base contact surface of the wireless charging device is circular or square.
The wireless charging device of any one of claims 1 to 10, further comprising:

a stepping motor;

the stepping motor is connected with the position adjusting mechanism and used for providing power for the position adjusting mechanism.
The wireless charging device of claim 11, wherein the position adjustment mechanism comprises:

a first adjustment mechanism for adjusting the position of the transmitting coil in a first direction;

the stepping motor is connected to the transmitting coil through the first adjusting mechanism;

the processor determines a movement parameter by means of picture recognition, and controls the position adjusting mechanism to adjust the position of the transmitting coil based on the movement parameter, including:

the processor is configured to determine a first distance and control the first adjustment mechanism to adjust the position of the transmit coil such that the transmit coil moves the first distance in the first direction.
The wireless charging apparatus of claim 12, wherein the processor is configured to determine the first distance, comprising:

and when the projection of the central point of the transmitting coil and the projection of the central point of the receiving coil are not in the same circle, the processor is used for determining the first distance.
The wireless charging device of claim 13, wherein the first direction is a direction in which a projection of a center point of the gear of the stepping motor is taken as a center of a circle and a projection of the center point of the transmitting coil is moved in a direction close to a projection direction of a center point of the receiving coil on a radius of the projection passing through the center point of the transmitting coil in a plane where the base contact surface is located.
The wireless charging device according to claim 13 or 14, wherein the first distance is a vertical distance between a circumference on which a projection of a center point of the gear of the stepping motor is located and a circumference on which a projection of a center point of the transmitting coil is located, and a circumference on which a projection of a center point of the receiving coil is located, in a plane on which the base contact surface is located.
The wireless charging apparatus of claim 12, wherein the processor is configured to determine the first distance, comprising:

and when a connection line of the projection of the central point of the transmitting coil and the projection of the central point of the receiving coil on the plane where the base contact surface is located is not parallel to a preset straight line, the processor is used for determining the first distance.
The wireless charging device of claim 16, wherein the predetermined one straight line is oriented in a longitudinal direction or a transverse direction of the base contact surface.
The wireless charging device according to claim 16 or 17, wherein the first direction is a direction parallel to the predetermined straight line, in which a projection direction of the projection of the transmitting coil is close to a center point of the receiving coil, moves in a plane where the base contact surface is located.
The wireless charging device according to any one of claims 16 to 18, wherein the first distance is a distance between a projection of a center point of the transmitting coil and a projection of a center point of the receiving coil in a direction parallel to the predetermined straight line in a plane where the base contact surface is located.
The wireless charging apparatus of any of claims 12 to 19, wherein the first adjustment mechanism comprises:

a first guide rail;

one end of the first guide rail is close to the stepping motor, the other end of the first guide rail is close to a certain peripheral position of the wireless charging device, and the first guide rail is used for supporting the transmitting coil and guiding the transmitting coil to move along the first direction.
The wireless charging device of claim 20, wherein a length of the base contact surface in a longitudinal direction or a transverse direction is equal to a length of the first rail.
The wireless charging device of claim 20, wherein, in a plane of the base contact surface, a radius of an inscribed circle of the base contact surface is equal to a length of the first guide rail, and a center of the inscribed circle coincides with a projection of a center point of the stepping motor.
The wireless charging device of any of claims 12 to 22, wherein the first adjustment mechanism further comprises:

a first gear shaft and a first traction wire;

when the processor controls the first adjusting mechanism to adjust the position of the transmitting coil, the gear of the stepping motor is meshed with the gear of the first gear shaft, and the shaft part of the first gear shaft is connected to one end of the transmitting coil through the first traction wire.
The wireless charging device of any of claims 20-23, wherein the first adjustment mechanism further comprises:

a first spring and a first fixed end;

wherein the first fixed end portion is provided at the other end of the first guide rail, and the first fixed end portion is connected to the transmitting coil through the first spring.
The wireless charging device of any of claims 12 to 24, wherein the position adjustment mechanism further comprises:

a second adjustment mechanism for adjusting a position of the transmitting coil in a second direction, the first direction and the second direction being different;

the stepping motor is connected to the first adjusting mechanism through the second adjusting mechanism;

the processor determines a movement parameter by means of picture recognition, and controls the position adjusting mechanism to adjust the position of the transmitting coil based on the movement parameter, including:

the processor is configured to determine a second distance and control the second adjustment mechanism to adjust the position of the transmitter coil via the stepper motor such that the transmitter coil moves the second distance in the second direction.
The wireless charging apparatus of claim 25, wherein the first direction and the second direction are perpendicular.
The wireless charging apparatus of claim 25 or 26, wherein the processor is configured to determine the second distance, comprising:

and when the projection of the central point of the gear of the stepping motor, the projection of the central point of the transmitting coil and the projection of the central point of the receiving coil are not on the same straight line on the plane where the base contact surface is located, the processor is used for determining the second distance.
The wireless charging device of claim 27, wherein the second direction is a direction in which a projection of a center point of the stepping motor is taken as a center of a circle and a projection direction of a center point of the transmitting coil on a circumference of the transmitting coil is moved in a plane where the base contact surface is located.
The wireless charging device of claim 27 or 28, wherein in a plane where the base contact surface is located, the second distance is an arc length subtended by a central angle, and the central angle is an included angle formed by taking a projection of a central point of a gear of the stepping motor as a center, and a radius of a projection of a central point of the transmitting coil and a radius of a projection of a central point of the receiving coil.
The wireless charging apparatus of claim 25 or 26, wherein the processor is configured to determine the second distance, comprising:

and determining the second distance when a connection line of the projection of the central point of the transmitting coil and the projection of the central point of the receiving coil is not perpendicular to the preset straight line on the plane where the base contact surface is located.
The wireless charging device of claim 30, wherein the second direction is a direction perpendicular to the predetermined straight line, in which a projection direction of the projection of the transmitting coil is close to a center point of the receiving coil, moves in a plane of the contact surface of the base.
The wireless charging device of claim 30 or 31, wherein the second distance is a distance between a projection of a center point of the transmitting coil and a projection of a center point of the receiving coil in a direction perpendicular to the predetermined straight line in a plane where the base contact surface is located.
The wireless charging apparatus of any of claims 25-32, wherein the second adjustment mechanism comprises:

the second gear shaft, the second traction wire and the first pulley;

when the processor controls the second adjusting mechanism to adjust the position of the transmitting coil, a gear of the stepping motor is meshed with a gear of the second gear shaft, a shaft part of the second gear shaft is connected with one end of the second traction wire, and the other end of the second traction wire is connected to the first fixed end part through the first pulley.
The wireless charging device of claim 33, wherein the second adjustment mechanism further comprises:

a second spring and a second fixed end;

wherein the first pulley and the second fixed end are respectively located at both sides of the first fixed end, and the first fixed end is connected to the second fixed end through the second spring.
The wireless charging device of claim 34, wherein the second adjustment mechanism comprises:

a first channel;

wherein the first channel is for receiving the second pull wire and/or the second spring.
The wireless charging device of any one of claims 25 to 35, wherein the processor determines a movement parameter by means of picture recognition, and controls the position adjustment mechanism to adjust the position of the transmitting coil based on the movement parameter, and the processor is configured to:

determining the first distance, and controlling the transmitting coil to move linearly in the first direction by the first distance by using the first adjusting mechanism;

determining the second distance and controlling the transmitting coil to move the second distance in the second direction using the second adjustment mechanism.
The wireless charging device of any one of claims 25 to 35, wherein the processor determines a movement parameter by means of picture recognition, and controls the position adjustment mechanism to adjust the position of the transmitting coil based on the movement parameter, and the processor is configured to:

determining the second distance and controlling the transmitting coil to move the second distance in the second direction using the second adjustment mechanism;

and determining the first distance, and controlling the transmitting coil to move linearly in the first direction by the first distance by using the first adjusting mechanism.
The wireless charging device of any one of claims 1 to 37, wherein the wireless charging device is a wireless charging cradle.
The wireless charging apparatus of any one of claims 1 to 38, wherein the wireless charging apparatus is connected to a power supply device.
The wireless charging apparatus of claim 39, wherein the power supply device is an adapter, an AC power source, a mobile power source or a computer.
A method for adjusting the position of a transmitting coil, which is applied to a wireless charging device, the method comprising:

transmitting an electromagnetic signal with a transmit coil in the wireless charging apparatus;

when the equipment to be charged wirelessly charges by using the electromagnetic signal, the mobile parameters are determined by using a picture recognition mode, and the position of the transmitting coil is adjusted based on the mobile parameters.
The method of claim 41, wherein the determining a movement parameter by picture recognition and adjusting the position of the transmitting coil based on the movement parameter when the device to be charged is wirelessly charged by the electromagnetic signal comprises:

placing the equipment to be charged on a base contact surface of the wireless charging device, and wirelessly charging the equipment to be charged by utilizing the electromagnetic signal;

acquiring a first image, wherein the first image is an image acquired through the base contact surface, the first image comprises an image of the device to be charged, the image of the device to be charged comprises an identification pattern, and the position of the identification pattern is used for indicating the position of the receiving coil;

generating a coordinate system based on the first image, and forming a second image;

determining first coordinates of the receiving coil in the second image based on coordinates of the identification pattern in the second image;

determining the movement parameter based on the first coordinates;

controlling the position adjustment mechanism to adjust the position of the transmitting coil based on the movement parameter so that a second coordinate of the transmitting coil in the second image coincides with the first coordinate.
The method of claim 42, wherein the identification pattern comprises at least one of: the corner identification pattern of the device to be charged and the trademark identification pattern of the device to be charged.
The method of claim 42 or 43, wherein determining the first coordinates of the receive coil in the second image based on the coordinates of the identification pattern in the second image comprises:

and determining the first coordinate according to the coordinate of the identification pattern in the second image, the position relation between the identification pattern and the receiving coil in the equipment to be charged and a first scaling ratio, wherein the first scaling ratio is the scaling ratio of the equipment to be charged in the second image.
The method of any one of claims 42 to 44, wherein the second image further comprises an image of the transmit coil, the determining the movement parameter based on the first coordinate comprising:

determining the second coordinates of the image of the transmit coil in the second image;

and determining the movement parameter according to the first coordinate and the second coordinate.
The method of claim 45, wherein determining the movement parameter from the first and second coordinates comprises:

determining a first parameter according to the first coordinate and the second coordinate;

determining the movement parameter according to the first parameter and a second scaling ratio, wherein the second scaling ratio is the scaling ratio of the base contact surface of the wireless charging device in the second image.
The method of any one of claims 41 to 46, wherein said acquiring a first image comprises:

and acquiring the first image by using an image acquisition device.
The method as claimed in claim 47, wherein one side of the base contact surface is used for placing the device to be charged, the image capturing device is located on the other side of the base contact surface, and the base contact surface is made of a transparent material.
The method of claim 47 or 48, wherein the image capture device is spaced from the other side of the base contact surface such that the image capture device can capture the entire base contact surface.
The method of any one of claims 41 to 49, wherein the base contact surface of the wireless charging device is circular or square.
The method of any one of claims 41 to 50, further comprising:

and adjusting the position of the transmitting coil by using the power provided by the stepping motor.
The method according to any one of claims 41 to 51, wherein the determining a movement parameter by means of picture recognition and adjusting the position of the transmitting coil based on the movement parameter comprises:

determining a first distance;

adjusting a position of the transmit coil such that the transmit coil moves the first distance in a first direction.
The method of claim 52, wherein determining the first distance comprises:

and determining the first distance when the projection of the central point of the transmitting coil and the projection of the central point of the receiving coil are not in the same circle by taking the projection of the central point of the gear of the stepping motor as the center of a circle on the plane where the base contact surface is located.
The method of claim 53, wherein the first direction is a direction in which a projection of a center point of the gear of the stepping motor is taken as a center of a circle and a projection of a center point of the transmitting coil passes on a radius of the projection of the center point of the transmitting coil, and the transmitting coil moves in a circumferential direction in which the projection of the center point of the transmitting coil is close to the receiving coil, in a plane in which the base contact surface is located.
The method of claim 53 or 54, wherein the first distance is a vertical distance between a circumference on which a projection of the center point of the transmitting coil is located and a circumference on which a projection of the center point of the receiving coil is located, around a projection of the center point of the gear of the stepping motor, in a plane on which the base contact surface is located.
The method of claim 55, wherein said determining a first distance comprises:

and determining the first distance when a connection line of the projection of the central point of the transmitting coil and the projection of the central point of the receiving coil is not parallel to a preset straight line on the plane where the base contact surface is located.
The method of claim 56, wherein the predetermined one straight direction is a longitudinal direction or a transverse direction of the base contact surface.
The method of claim 56 or 57, wherein the first direction is a direction parallel to the predetermined one of the straight lines, in which a projection direction of the projection of the transmitting coil is shifted to a direction of a projection of the center point of the receiving coil, in a plane of the base contact surface.
The method according to any one of claims 56 to 58, wherein the first distance is a distance between a projection of a center point of the transmitting coil and a projection of a center point of the receiving coil in a direction parallel to the predetermined one of the straight lines in a plane of the base contact surface.
The method of any one of claims 52 to 59, wherein said adjusting the position of the transmit coil comprises:

and controlling the transmitting coil to linearly move in the first direction by the first distance by utilizing a first guide rail, wherein one end of the first guide rail is close to the stepping motor, the other end of the first guide rail is close to a certain peripheral position of the wireless charging device, and the first guide rail is used for placing the transmitting coil.
The method of claim 60, wherein a length of the base contact surface in a longitudinal direction or a transverse direction is equal to a length of the first rail.
The method of claim 60, wherein the radius of an inscribed circle of the base contact surface in a plane in which the base contact surface lies is equal to the length of the first guide rail, and the center point of the inscribed circle is a projection of the center point of the stepping motor.
The method of any one of claims 52 to 62, wherein said adjusting the position of the transmit coil comprises:

and controlling the transmitting coil to linearly move in the first direction by the first distance by using the gear of the stepping motor, a first gear shaft and a first traction wire, wherein the gear of the stepping motor is meshed with the gear of the first gear shaft, and the shaft part of the first gear shaft is connected to one end of the transmitting coil through the first traction wire.
The method of any one of claims 60 to 63, further comprising:

and resetting the transmitting coil by using a first spring and a first fixed end part, wherein the first fixed end part is arranged at the other end of the first guide rail, and the first fixed end part is connected to the transmitting coil through the first spring.
The method according to any one of claims 52 to 64, wherein the determining a movement parameter by means of picture recognition and adjusting the position of the transmitting coil based on the movement parameter comprises:

determining a second distance;

adjusting a position of the transmit coil such that the transmit coil moves the second distance in a second direction, the first direction and the second direction being different.
The method of claim 65, wherein the first direction and the second direction are perpendicular.
The method of claim 65 or 66, wherein said determining a second distance comprises:

and when the projection of the central point of the gear of the stepping motor, the projection of the central point of the transmitting coil and the projection of the central point of the receiving coil are not on the same straight line on the plane where the base contact surface is located, the processor is used for determining the second distance.
The method of claim 57, wherein the second direction is a direction in which a projection of a center point of the stepping motor is taken as a center of a circle and a projection of a center point of the transmitting coil on a circumference of the transmitting coil is moved in a direction close to the center point of the receiving coil in a plane of the base contact surface.
The method of claim 57 or 58, wherein the second distance is an arc length subtended by a central angle from a projection of a central point of a gear of the stepper motor, a radius of the projection of the central point of the transmitter coil, and a radius of the projection of the central point of the receiver coil, in a plane of the base contact surface.
The method of claim 65 or 66, wherein said determining a second distance comprises:

and determining the second distance when a connection line of the projection of the central point of the transmitting coil and the projection of the central point of the receiving coil is not perpendicular to the preset straight line on the plane where the base contact surface is located.
The method according to claim 70, wherein the second direction is a direction perpendicular to the predetermined one of the straight lines, in which a projection direction of the projection of the transmitting coil is shifted to be close to a center point of the receiving coil, in a plane of the base contact surface.
The method of claim 70 or 71, wherein the second distance is a distance between a projection of a center point of the transmitting coil and a projection of a center point of the receiving coil in a direction perpendicular to the predetermined one of the straight lines in a plane of the base contact surface.
The method of any one of claims 65 to 72, wherein said adjusting the position of the transmit coil comprises:

and adjusting the position of the transmitting coil by using a second gear shaft, a second traction wire and a first pulley so that the transmitting coil moves the second distance in the second direction, wherein a gear of the stepping motor is meshed with a gear of the second gear shaft, a shaft part of the second gear shaft is connected with one end of the second traction wire, and the other end of the second traction wire is connected to the first fixed end part through the first pulley.
The method of claim 73, further comprising:

and restoring the first guide rail by using a second spring and a second fixed end portion, wherein the first pulley and the second fixed end portion are respectively positioned at both sides of the first fixed end portion, and the first fixed end portion is connected to the second fixed end portion through the second spring.
The method of claim 74, wherein the second pull wire and/or the second spring is received within a first channel in the wireless charging device.
The method according to any one of claims 65 to 75, wherein the determining a movement parameter by means of picture recognition and adjusting the position of the transmitting coil based on the movement parameter comprises:

determining the first distance and controlling the transmitting coil to move linearly in the first direction by the first distance;

determining the second distance and controlling the transmitting coil to move the second distance in the second direction.
The method according to any one of claims 65 to 75, wherein the determining a movement parameter by means of picture recognition and adjusting the position of the transmitting coil based on the movement parameter comprises:

determining the second distance and controlling the transmitting coil to move the second distance in the second direction;

and determining the first distance, and controlling the transmitting coil to move linearly in the first direction by the first distance.
The method of any one of claims 41 to 77, wherein the wireless charging device is a wireless charging dock.
The method of any one of claims 41 to 78, wherein the wireless charging apparatus is connected to a power supply device.
The method of claim 79, wherein the power supply device is an adapter, an AC power source, a mobile power source, or a computer.