A wireless charging system capable of automatic positioning and tracking and its method

Abstract

The present invention discloses a wireless charging system capable of automatic positioning and tracking and a method thereof, including a transmitting end, a receiving end, and a communication module for communication between the transmitting end and the receiving end; the transmitting end includes a transmitting main control MCU, a plurality of positioning receiving modules, a resonant power amplifier driving module, and an electromagnetic wave transmitting module; the transmitting main control MCU is respectively connected to the positioning receiving module and the resonant power amplifier driving module, and the resonant power amplifier driving module is also connected to the electromagnetic wave transmitting module. The transmitting end of the present invention is provided with a plurality of electromagnetic wave transmitting coils, and adopts a multi-transmitting and single-receiving method to realize long-distance power supply to the load, which can ensure the efficiency and stability of power transmission. At the same time, it can increase the power transmission distance and has strong practicability.

Description

Technical Field

[0001] The present invention relates to the technical field of wireless charging, and particularly to a wireless charging system capable of automatically positioning and tracking and a method thereof. Background Art

[0002] Existing wireless charging systems basically adopt the method of single-module transmission and single-module reception. This method has low charging efficiency and a short wireless charging distance. In order to increase the power transmission efficiency, some use high-frequency bands such as high-power millimeter waves to work, and their high-frequency thermal effects will seriously affect human safety and people's physical and mental health. At the same time, the charging terminal can only achieve wireless charging at a specific position and cannot track and locate the charging terminal, making it extremely inconvenient to use. Summary of the Invention

[0003] The purpose of the present invention is to provide a wireless charging system capable of automatically positioning and tracking and a method thereof to solve the above problems.

[0004] To achieve the above purpose, the following technical solutions are adopted:

[0005] A wireless charging system capable of automatically positioning and tracking includes a transmitting end, a receiving end, and a communication module for communicating between the transmitting end and the receiving end; the transmitting end includes a transmitting main control MCU, a plurality of positioning receiving modules, a resonant power amplifier driving module, and an electromagnetic wave transmitting module; the transmitting main control MCU is respectively connected to the positioning receiving module and the resonant power amplifier driving module, and the resonant power amplifier driving module is also connected to the electromagnetic wave transmitting module; the positioning receiving module is used to receive the position information transmitted from the receiving end to the transmitting end, and the transmitting main control MCU is used to control the electromagnetic wave transmitting module to transmit electromagnetic waves to the receiving end through the resonant power amplifier driving module according to the position information of the receiving end; the receiving end is used to receive electromagnetic waves and convert them into electric energy to supply power to a load.

[0006] Further, the electromagnetic wave transmitting module has a regular triangular prism structure, includes three transmitting plates, and each transmitting plate is located on one side surface of the regular triangular prism; a plurality of electromagnetic wave transmitting coils are further installed on the outer wall of each transmitting plate, and the plurality of electromagnetic wave transmitting coils are distributed in a rectangular array.

[0007] Further, the electromagnetic wave transmitting coil has a rod-shaped structure.

[0008] Further, the transmitting end further includes a transmitting power sampling module connected between the transmitting main control MCU and the electromagnetic wave transmitting module.

[0009] Further, the transmitting end further includes a display module connected to the transmitting main control MCU.

[0010] Furthermore, the receiving end includes a receiving main control MCU, and an electromagnetic wave receiving module, a rectifier and filter module, and a buck and voltage stabilization module which are connected to the receiving main control MCU in sequence; the receiving main control MCU is also connected to a positioning transmission module, which is used to send the location information of the receiving end to the transmitting end.

[0011] Furthermore, the receiving end also includes a receiving power sampling module connected between the receiving main control MCU and the electromagnetic wave receiving module.

[0012] A wireless charging method capable of automatic positioning and tracking is also provided, comprising the following steps:

[0013] S1: Divide a number of electromagnetic wave transmitting coils located on each side of the regular triangular prism into a number of groups in advance;

[0014] S2: The receiving end sends a positioning signal and a power demand signal for load charging to the transmitting end. The transmitting end obtains the position information of the receiving end based on the positioning signal, and matches with one set of electromagnetic wave transmitting coils based on the position information of the receiving end;

[0015] S3: The transmitting main control MCU adjusts the electromagnetic wave transmission direction and power according to the positioning signal sent by the receiving end and the power demand signal of the load charging, and transmits electromagnetic waves to the receiving end through a group of electromagnetic wave transmitting coils matched with the receiving end;

[0016] S4: The receiving end converts the received electromagnetic waves into electrical energy to charge the load;

[0017] S5: The receiving power sampling module at the receiving end collects the power of the electromagnetic wave received by the electromagnetic wave receiving module in real time, and feeds it back to the transmitting end so that the transmitting end can make adaptive adjustments.

[0018] Furthermore, the basis for grouping the electromagnetic wave transmitting coils in S1 is: based on the electromagnetic wave radiation angle, each side of the regular triangular prism is divided into a number of angle range thresholds, and the electromagnetic wave transmitting coils in the same angle range threshold are grouped together.

[0019] By adopting the above scheme, the beneficial effects of the present invention are:

[0020] 1) The transmitting end is equipped with multiple electromagnetic wave transmitting coils, and adopts a multi-transmitting and single-receiving method to realize long-distance power supply to the load, which can ensure the efficiency and stability of power transmission and increase the power transmission distance;

[0021] 2) The electromagnetic wave emission module has a regular triangular prism structure, and a number of electromagnetic wave emission coils arranged in a rectangular array are disposed on each side of the regular triangular prism. Each side can achieve electromagnetic wave radiation within a range of 120°, and the three sides can cover a 360° space range, expanding the wireless charging area and ensuring that the receiving end can wirelessly receive electric energy in every orientation, which is convenient to use;

[0022] 3) Using an electromagnetic wave emission module with a regular triangular prism structure, the electromagnetic waves it emits can cover a 360° space range. Therefore, there is no need to add mechanical rotating components, nor focusing or collimating devices. It is convenient to use, has a small volume and high integration. In addition, since there are no mechanical rotating components, the angular resolution in the horizontal direction does not depend on the rotation speed of the rotating structure. Therefore, the angular resolution in two directions can be freely controlled with high precision. At the same time, the electromagnetic wave emission module can be freely arranged according to the specific usage scenario without being restricted by space, and has strong versatility;

[0023] 4) By pre-grouping the electromagnetic wave emission coils, multiple loads can be wirelessly charged without interference, which has strong practicality;

[0024] 5) The transmitting end can adjust the phase, intensity, frequency, polarity, waveform, etc. of the electromagnetic wave emission module in real time according to the electromagnetic wave reception power and position information fed back by the receiving end, which can ensure that the receiving end is always at the optimal reception power and improve the charging efficiency. Brief Description of the Drawings

[0025] Figure 1 is a perspective view of the electromagnetic wave emission module of the present invention;

[0026] Figure 2 is Figure 1 the top view of;

[0027] Figure 3 is a principle block diagram of the present invention;

[0028] Among them, the description of the drawing reference numerals:

[0029] 1 - Transmitting end; 2 - Receiving end;

[0030] 3 - Communication module; 11 - Transmitting main control MCU;

[0031] 12 - Positioning receiving module; 13 - Resonant power amplifier driving module;

[0032] 14 - Electromagnetic wave emission module; 15 - Transmitting power sampling module;

[0033] 16 - Display module; 21 - Receiving main control MCU;

[0034] 22 - Electromagnetic wave receiving module; 23 - Rectification and filtering module;

[0035] 24 - Step-down and voltage regulation module; 25 - Positioning and transmitting module;

[0036] 26 - Received power sampling module; 141 - Transmitting board;

[0037] 142 - Electromagnetic wave transmitting coil. Specific implementation mode

[0038] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0039] Refer to Figures 1 to 3 As shown, the present invention provides a wireless charging system capable of automatic positioning and tracking, including a transmitting end 1, a receiving end 2, and a communication module 3 for communicating between the transmitting end 1 and the receiving end 2; the transmitting end 1 includes a transmitting main control MCU 11, a plurality of positioning receiving modules 12, a resonant power amplifier driving module 13, and an electromagnetic wave transmitting module 14; the transmitting main control MCU 11 is respectively connected to the positioning receiving module 12 and the resonant power amplifier driving module 13, and the resonant power amplifier driving module 13 is also connected to the electromagnetic wave transmitting module 14; the positioning receiving module 12 is used to receive the position information transmitted from the receiving end 2 to the transmitting end 1, and the transmitting main control MCU 11 is used to control the electromagnetic wave transmitting module 14 to transmit electromagnetic waves to the receiving end 2 through the resonant power amplifier driving module 13 according to the position information of the receiving end 2; the receiving end 2 is used to receive electromagnetic waves and convert them into electric energy to supply power to the load.

[0040] Among them, the electromagnetic wave transmitting module 14 has a regular triangular prism structure, including three transmitting boards 141, and each transmitting board 141 is located on one side of the regular triangular prism; a plurality of electromagnetic wave transmitting coils 142 are further installed on the outer wall of each transmitting board 141, and the plurality of electromagnetic wave transmitting coils 142 are distributed in a rectangular array; the electromagnetic wave transmitting coil 142 has a rod-shaped structure; the transmitting end 1 further includes a transmitting power sampling module 15 connected between the transmitting main control MCU 11 and the electromagnetic wave transmitting module 14; the transmitting end 1 further includes a display module 16 connected to the transmitting main control MCU 11; the receiving end 2 includes a receiving main control MCU 21, and an electromagnetic wave receiving module 22, a rectification and filtering module 23, and a step-down and voltage regulation module 24 connected to the receiving main control MCU 21 in sequence; the receiving main control MCU 21 is further connected to a positioning transmitting module 25, and the positioning transmitting module 25 is used to send the position information of the receiving end 2 to the transmitting end 1; the receiving end 2 further includes a receiving power sampling module 26 connected between the receiving main control MCU 21 and the electromagnetic wave receiving module 22.

[0041] A wireless charging method capable of automatic positioning and tracking is also provided, including the following steps:

[0042] S1: Divide a plurality of electromagnetic wave transmitting coils 142 located on each side of the regular triangular prism into a plurality of groups in advance;

[0043] S2: The receiving end 2 sends a positioning signal and a power demand signal for load charging to the transmitting end 1. The transmitting end 1 obtains the position information of the receiving end 2 according to the positioning signal, and matches with one set of electromagnetic wave transmitting coils 142 according to the position information of the receiving end 2;

[0044] S3: The transmitting main control MCU 11 adjusts the electromagnetic wave transmitting direction and power according to the positioning signal sent by the receiving end 2 and the power demand signal of the load charging, and transmits electromagnetic waves to the receiving end 2 through a group of electromagnetic wave transmitting coils 142 matched with the receiving end 2;

[0045] S4: The receiving end 2 converts the received electromagnetic waves into electrical energy to charge the load;

[0046] S5: The receiving power sampling module 26 of the receiving end 2 collects the power of the electromagnetic wave received by the electromagnetic wave receiving module 22 in real time, and feeds it back to the transmitting end 1 so that the transmitting end 1 can make adaptive adjustments.

[0047] The basis for grouping the electromagnetic wave transmitting coils 142 in S1 is: based on the electromagnetic wave radiation angle, each side of the regular triangular prism is divided into a number of angle range thresholds, and the electromagnetic wave transmitting coils 142 in the same angle range threshold are grouped together.

[0048] Working principle of the present invention:

[0049] Continue to refer to Figures 1 to 3 As shown, in this embodiment, the electromagnetic wave transmitting module 14 is in the form of a regular triangular prism or other geometric shape, and a plurality of electromagnetic wave transmitting coils 142 in a rectangular array distribution (or other forms of array distribution) are arranged on each side of the regular triangular prism or other geometric shape, and each side can realize electromagnetic wave radiation within a range of 120°, and the three sides can cover a spatial range of 360°, thereby expanding the wireless charging area and ensuring that the receiving end 2 can wirelessly receive electric energy in every orientation, which is convenient to use; at the same time, the electromagnetic wave transmitting coil 142 is in a rod-shaped structure, including a rod body, and a coil wound around the outside of the rod body in the length direction of the rod body. Compared with the general method of using a large coil with a circular structure, the volume of the transmitting end 1 can be greatly reduced, and thus a large installation space will not be occupied.

[0050] In this embodiment, the transmitting master MCU 11 can generate PWM signals with a duty cycle of 50% and multiple different phases. After being amplified by the resonant power amplifier driving module 13, the PWM signals are used to drive the electromagnetic wave transmitting module 14 to transmit high-frequency half-sine power electromagnetic waves to the receiving end 2, thereby realizing remote power supply. The phase, amplitude, frequency, polarity, and waveform of the multi-phase PWM signals can be precisely controlled by the transmitting master MCU 11 to generate a power beam that can be quickly scanned and focused in a specific direction. When the receiving end 2 needs to start power supply, it first transmits its position information and the charging power information required by the load (the power demand signal for load charging) to the transmitting end 1 through the positioning and transmitting module 25 and the communication module 3 respectively. The transmitting master MCU 11 adjusts the beam direction of the transmitting end 1 to point to the receiving end 2 according to the received charging power information and position information, achieving directional focusing and enhancing the receiving effect to achieve the purpose of efficient transmission. According to the power consumption requirements of the load, after receiving the power signal, the receiving end 2 adjusts the voltage and current through the rectification and filtering module 23 and the buck and voltage regulation module 24 in sequence to charge the load.

[0051] The electromagnetic wave transmitting module 14 is in the shape of a regular triangular prism. A number of electromagnetic wave transmitting coils 142 located on each side of the regular triangular prism can be pre-grouped. Since each side can achieve 120° electromagnetic wave radiation, each 120° can be divided into several groups according to the angular range threshold. The electromagnetic wave transmitting coils 142 within the same angular range threshold are one group. At the same time, It can also be divided into several groups according to the situation , that is, the number of groups is determined according to the number of receiving ends 2. One receiving end 2 corresponds to one group. For example, Figure 2As shown, in one embodiment, one side can be divided into three groups. The three columns of electromagnetic wave transmitting coils 142 on the left side of this side are divided into the first group, the three columns of electromagnetic wave transmitting coils 142 on the right side are divided into the second group, and the middle ones are the third group. When the receiving end 2 is within the angular range threshold area divided on the left, it is powered by the three columns of electromagnetic wave transmitting coils 142 on the left. When there are multiple receiving ends 2, the corresponding group of electromagnetic wave transmitting coils 142 can be controlled to transmit electric energy according to the positions of the receiving ends 2 without interference. Similarly, each column of electromagnetic wave transmitting coils 142 can be grouped vertically so that receiving ends 2 at different heights are powered by different groups of electromagnetic wave transmitting coils 142; The electromagnetic wave transmitting module 14 with a regular triangular prism structure is adopted, and the electromagnetic waves it emits can cover a 360° space range. When the receiving end 2 is in any position, the transmitting end 1 can automatically track it without adding mechanical rotating components, nor focusing or collimating equipment, which is convenient to use, has a small volume and high integration. In addition, due to the absence of mechanical rotating components, the angular resolution in the horizontal direction does not depend on the rotation speed of the rotating structure. Therefore, the angular resolution in two directions can be freely controlled with high precision. At the same time, the electromagnetic wave transmitting module 14 can be freely arranged according to the specific use scenario without being restricted by space, and has strong versatility.

[0052] In this embodiment, the positioning transmitting module 25 and the positioning receiving module 12 adopt ultrasonic positioning units with a positioning accuracy at the centimeter level and high positioning accuracy: The positioning transmitting module 25 (installed at the receiving end 2) can send the receiving end 2 ID and positioning information to the positioning receiving module 12 (there are multiple positioning receiving modules 12 installed at the transmitting end 1. Through the time difference of signal reception, the distance, three-dimensional coordinates, etc. of the receiving end 2 can be calculated). The transmitting end 1 can determine the position of the receiving end 2 based on this information, and then control the corresponding group of electromagnetic wave transmitting coils 142 to emit a directional power beam to implement long-distance power supply; The communication module 3 adopts a low-cost Bluetooth module, and the transmitting end 1 and the receiving end 2 can communicate in real time, which is convenient for the transmitting end 1 to adaptively adjust its transmission power (the transmitting end 1 can adjust the phase, intensity, frequency, polarity, waveform, etc. of the electromagnetic wave transmitting module 14 in real time according to the electromagnetic wave reception power and position information fed back by the receiving end 2, which can ensure that the receiving end 2 is always in the best reception power and improve the charging efficiency); In addition, the transmitting end 1 is also provided with a display module 16, which can display various information such as the working status of each module, system parameters, and online charging equipment in real time, facilitating viewing.

[0053] In addition, a wireless charging method with automatic positioning and tracking is provided. First, a number of electromagnetic wave transmitting coils 142 on each side of the regular triangular prism need to be divided into several groups in advance. The basis for the grouping method is as follows: Based on the electromagnetic wave radiation angle, each side of the regular triangular prism is divided into several angle range thresholds. The electromagnetic wave transmitting coils 142 within the same angle range threshold are regarded as a group (refer to Figure 2 as shown). Subsequently, the receiving end 2 sends a positioning signal and a power demand signal for load charging (the charging power required by the load) to the transmitting end 1. After the multiple positioning receiving modules 12 of the transmitting end 1 receive the positioning signal, the actual distance of the receiving end 2 is calculated by calculating the time difference of reception. Then, based on the distance differences of the multiple positioning receiving modules 12, the three-dimensional coordinates or spherical coordinates of the receiving end 2 are calculated using geometric principles. Various parameters such as the phase, intensity, frequency, polarity, and waveform of the transmitting end 1 are calculated according to the coordinate values, the electromagnetic wave emission direction and power are adjusted, and electromagnetic waves are emitted to the receiving end 2 through a group of electromagnetic wave transmitting coils 142 that are matched with the receiving end 2. The receiving end 2 converts the received electromagnetic waves into electrical energy to charge the load, and the receiving power sampling module 26 of the receiving end 2 can collect the power of the electromagnetic waves received by the electromagnetic wave receiving module 22 in real time and feedback it to the transmitting end 1 so that the transmitting end 1 can adaptively adjust to ensure the charging efficiency.

[0054] In addition, in another embodiment, the electromagnetic wave transmitting module 14 and the electromagnetic wave receiving module 22 can be replaced with ultrasonic modules that emit ultrasonic waves. At this time, the receiving end 2 further includes an ultrasonic conversion circuit module for converting ultrasonic waves into electrical energy to supply power to the load.

[0055] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. A wireless charging system capable of automatic positioning and tracking, characterized in that, It includes a transmitting end, a receiving end, and a communication module for communicating between the transmitting end and the receiving end; the transmitting end includes a transmitting main control MCU, several positioning receiving modules, a resonant power amplifier driving module and an electromagnetic wave transmitting module; The transmitting main control MCU is connected to the positioning receiving module and the resonant power amplifier driving module respectively, and the resonant power amplifier driving module is also connected to the electromagnetic wave transmitting module; the positioning receiving module is used to receive the position information transmitted by the receiving end to the transmitting end, and the transmitting main control MCU is used to control the electromagnetic wave transmitting module to transmit electromagnetic waves to the receiving end through the resonant power amplifier driving module according to the position information of the receiving end; the receiving end is used to receive the electromagnetic waves and convert them into electrical energy to power the load; The electromagnetic wave transmitting module is in the form of a regular triangular prism structure, including three transmitting plates, and each transmitting plate is located on one of the side surfaces of the regular triangular prism; a plurality of electromagnetic wave transmitting coils are also installed on the outer wall of each transmitting plate, and the plurality of electromagnetic wave transmitting coils are distributed in a rectangular array; The electromagnetic wave transmitting coil is in a rod-shaped structure; The transmitting end also includes a transmitting power sampling module connected between the transmitting main control MCU and the electromagnetic wave transmitting module; the receiving end includes a receiving main control MCU, and an electromagnetic wave receiving module, a rectifying and filtering module, and a buck stabilizing module connected to the receiving main control MCU in sequence; the receiving main control MCU is also connected to a positioning transmitting module, and the positioning transmitting module is used to send the location information of the receiving end to the transmitting end; The receiving end also includes a receiving power sampling module connected between the receiving main control MCU and the electromagnetic wave receiving module.

2. The wireless charging system capable of automatic positioning and tracking according to claim 1, characterized in that, The transmitting end also includes a display module connected to the transmitting main control MCU.

3. A wireless charging method capable of automatic positioning and tracking, characterized in that, The following steps are involved: S1: Divide a number of electromagnetic wave transmitting coils located on each side of the regular triangular prism into a number of groups in advance; S2: The receiving end sends a positioning signal and a power demand signal for load charging to the transmitting end. The transmitting end obtains the position information of the receiving end based on the positioning signal, and matches with one set of electromagnetic wave transmitting coils based on the position information of the receiving end; S3: The transmitting main control MCU adjusts the electromagnetic wave transmission direction and power according to the positioning signal sent by the receiving end and the power demand signal of the load charging, and transmits electromagnetic waves to the receiving end through a group of electromagnetic wave transmitting coils matched with the receiving end; S4: The receiving end converts the received electromagnetic waves into electrical energy to charge the load; S5: The receiving power sampling module at the receiving end collects the power of the electromagnetic wave received by the electromagnetic wave receiving module in real time, and feeds it back to the transmitting end so that the transmitting end can make adaptive adjustments.

4. The wireless charging method capable of automatic positioning and tracking according to claim 3, characterized in that, The basis for grouping the electromagnetic wave transmitting coils in S1 is: based on the electromagnetic wave radiation angle, each side of the regular triangular prism is divided into a number of angle range thresholds, and the electromagnetic wave transmitting coils in the same angle range threshold are grouped together.

Images