CN112886723B - Wireless charger capable of automatically positioning charging and implementation method - Google Patents
Wireless charger capable of automatically positioning charging and implementation method Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/90—Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
Abstract
The invention discloses a wireless charger capable of automatically positioning charging and an implementation method thereof in the technical field of wireless charging, wherein a control module, a position detection module communicated with the control module, a driving module and a charging module are arranged in a shell. The invention saves the consumption of energy to the greatest extent, ensures the service lives of the wireless charger and the electronic equipment, ensures the reliability of charging, and has strong equipment interactivity.
Description
Technical Field
The invention relates to the technical field of wireless charging, in particular to a wireless charger capable of automatically positioning charging and an implementation method.
Background
Wireless charging technology (English: wireless charging technology; wireless charge technology) is widely used in various industries, and wireless chargers are common charging devices in daily life. The wireless charger utilizes the principle of electromagnetic induction to generate current through electromagnetic induction between the primary coil and the secondary coil, so that energy is transferred in a space range, and the charger and the power utilization device transfer energy through a magnetic field, so that non-contact propagation is realized.
When electronic equipment such as a mobile phone and the like is charged by using a wireless charger, the positions of receiving coils of different types of electronic equipment are different due to uncertainty of the placement positions of the electronic equipment, so that the positions of the receiving coils and the transmitting coils in the wireless charger are inevitably deviated, and the positions of the receiving coils and the transmitting coils are not corresponding. However, such a non-correspondence relationship may sometimes cause a phenomenon that charging is impossible, or transmission efficiency is reduced in the charging process, which not only brings about energy loss, but also affects the service life of the wireless charger or the electronic device due to temperature rise of the wireless charger or the electronic device. Therefore, how to ensure the correspondence between the wireless charger and the electronic device position becomes one of the important points of the wireless charger.
In order to solve the above-mentioned problems, some wireless chargers have a structure of automatic coil alignment, for example, chinese patent publication No. CN 107370244A discloses a magnetic coil position detection device and a position detection method for electromagnetic induction type wireless charging. The method comprises the steps of respectively measuring induced electromotive forces through three coils, and determining the moving position of the coils through the proportional relation of the induced electromotive forces among the three coils. However, this detection method has a large error, and if the electronic device is inclined or is disturbed by other devices, the detection result of this detection method has a large error. The detection mode can only determine the relative balanced position of the three coils, and if the charging efficiency of the position does not meet the basic requirement, the phenomena of reduced charging efficiency and increased heat generation can also occur. In addition, the three coils at the periphery also affect the range of motion of the middle transmit coil, which has spatial limitations.
The defects are worth solving.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a wireless charger capable of automatically positioning charging and an implementation method.
The technical scheme of the invention is as follows:
the wireless charger capable of automatically positioning during charging comprises a shell, and is characterized in that a control module, a position detection module communicated with the control module, a driving module and a charging module are arranged in the shell,
the position detection module is used for detecting charging efficiency values of different positions;
the control module sends a driving signal to the driving module according to the optimal charging position coordinate determined by the detection information of the position detection module;
after receiving the driving signal, the driving module drives the charging module to move to an optimal charging position and sends a feedback signal;
the charging module is used for receiving the charging signal sent by the control module and charging the equipment to be charged.
The invention according to the scheme is characterized in that the control module is internally provided with an MCU, a first detection unit, a space calculation unit, a drive control unit and a charging unit, wherein the first detection unit, the space calculation unit, the drive control unit and the charging unit are connected with the MCU:
the first detection unit is used for communicating with the position detection module, driving the position detection module to perform optimal charging position detection, and receiving a detection result of the position detection module;
the space calculating unit calculates and obtains the space coordinate of the optimal charging position according to the received detection result;
the driving unit sends a driving signal to the driving module according to the coordinates of the optimal charging position;
and the charging unit sends a charging instruction to the charging module after receiving the signal that the charging module moves in place.
The invention according to the above scheme is characterized in that the position detection module comprises a first direction wire frame and a second direction wire frame, the charging efficiency of each unit charging area in the first direction is respectively obtained by moving the first direction wire frame, and the charging efficiency of each unit charging area in the second direction is respectively obtained by moving the second direction wire frame.
According to the scheme, the charging module is characterized by comprising a magnetic isolation plate and a charging coil positioned on one side of the magnetic isolation plate, wherein the height of an outer layer winding in the charging coil is higher than that of an adjacent inner layer winding, so that the charging coil surrounds and forms an inverted truncated cone shape.
The invention according to the scheme is characterized in that the shell is also internally provided with a to-be-charged detection module connected with the control module, and the to-be-charged detection module is used for sensing whether to-be-charged equipment exists on the shell and sending the sensing result to the control module.
The invention according to the scheme is characterized in that the shell is also internally provided with a temperature detection module connected with the control module, and the temperature detection module is used for detecting the temperature of equipment to be charged and/or the charging module and feeding back the temperature value to the control module.
The wireless charger is characterized in that the shell is also internally provided with an indication module connected with the control module, and the indication module is used for receiving the instruction of the control module and displaying the running condition of the wireless charger.
On the other hand, the implementation method of the wireless charger for automatic positioning of charging is characterized by comprising the following steps:
s1, detecting and judging whether charging equipment exists in a detection area;
s2, if charging equipment is arranged, periodically scanning the detection area, and determining the coordinates of the optimal charging position;
s3, the control module drives the charging module to move to an optimal charging position through the driving module;
and S4, after the charging module moves in place, starting charging operation.
The present invention according to the above-mentioned aspect is characterized in that in step S2, after determining the optimal charging position, it is determined whether the optimal charging position is located in the movable area of the charging module, if so, the next step is performed, if the optimal charging position is located outside the movable area of the charging module, an alarm message is sent, and the charging process is ended.
The present invention according to the above scheme is characterized in that in step S2, the detection area is periodically scanned by the position detection module, and the coordinates of the optimal charging position are obtained by calculation by the control module, which comprises the following specific steps:
in the position detection module, the first direction wire frame and the second direction wire frame respectively move to the starting end;
the first direction wire frame and the second direction wire frame move towards the terminal end at the same time, and the charging efficiency of each unit charging area is obtained in the moving process;
the control module obtains the coordinates of the optimal unit charging area in the first direction and the coordinates of the optimal charging area in the second direction, and the coordinates of the optimal charging position in the whole detection area are obtained by superposition of the first coordinates and the second coordinates.
The invention according to the above scheme has the beneficial effects that the invention divides the detection area into n 2 Detecting the charging efficiency of the whole detection area in the same first direction and the second direction respectively to obtain an accurate and optimal charging position, and moving the charging module to the position through the determination of the optimal charging position coordinate to ensure that the charging efficiency of the charging module is highest; the detection mode can make the detection result more accurateIn addition, when the charging operation is carried out, the wire frames in two directions cannot influence the charging operation, so that the charging efficiency is fully ensured.
The invention has the advantages that the internal detection component and the charging mobile component are additionally arranged, the occupation of the internal space is furthest saved, meanwhile, the energy consumed by detection and movement is less compared with the loss caused by unresponsiveness of charging, the consumption of energy sources is furthest saved, the service lives of the wireless charger and the electronic equipment are ensured, the reliability of charging is ensured, and the interactivity of the equipment is strong.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic diagram of a position detecting module according to the present invention;
FIG. 3 is a schematic diagram of an implementation of a starting position of the position detection module according to the present invention;
FIG. 4 is a schematic diagram of an embodiment of a position detection module according to the present invention;
FIG. 5 is a schematic diagram of a driving module according to the present invention;
FIG. 6 is a schematic diagram of a charging module according to the present invention;
FIG. 7 is a side cross-sectional view of a charging module of the present invention;
FIG. 8 is a system block diagram of the present invention;
FIG. 9 is a block diagram of a control module;
FIG. 10 is a flow chart of an implementation of an embodiment of the present invention;
FIG. 11 is a flow chart of another embodiment of the present invention;
FIG. 12 is a flowchart illustrating an implementation of determining optimal charging position coordinates according to an embodiment of the present invention;
fig. 13 is a flowchart of an implementation of determining optimal charging position coordinates according to another embodiment of the present invention.
In the figure, 11-upper shell; 12-a lower shell; 121-a buckling part;
a 20-position detection module; 21-a detection driving part; 22-a carrying frame; 23-a swiveling wheel; 24-turning the belt; 25-a first directional wire frame; 26-screw; 27-wire frame fixtures; 28-a second directional wire frame;
30-a charging module; 31-a magnetic shield; 32-a charging coil;
40-a circuit board;
50-a display part;
611-a first drive member; 612—a first transmission rod; 613-driving a slider; 614-supporting the shaft; 621-a second driving member; 622-second transfer bar.
Detailed Description
The invention is further described below with reference to the drawings and embodiments:
as shown in fig. 1 to 13, a wireless charger capable of automatically positioning during charging is used for charging wireless charging equipment, wherein the wireless charging equipment is electronic equipment with a receiving coil and comprises a mobile phone, a tablet personal computer, an intelligent bracelet, an electric hair drier, an intelligent water cup, an electric kettle and the like. According to the wireless charging device, the receiving coil in the wireless charging device is positioned, and the internal charging module 30 is moved to correspond to the position of the receiving coil, so that the charging efficiency of the wireless charging device by the charging module 30 is increased, the temperature rise of the wireless charger and the wireless charging device is reduced, the reliability of the charging process is ensured, and the interactivity of wireless charging is increased.
Example 1
A wireless charger for automatic positioning of charging includes a housing for supporting all internal mechanisms and providing a charging platform for a wireless charging device.
Fig. 1 is a specific structural view of an embodiment of the present invention, in the embodiment shown in fig. 1, the housing includes an upper shell 11 and a lower shell 12, and the upper shell 11 and the lower shell 12 are fastened together. In the present embodiment, the lower case 12 is provided with a locking portion 121 for mating with the upper case 11, and the upper case 11 is locked in the locking portion 121. The specific shape and dimensions of the housing may be customized as desired and are not limited in detail herein.
Fig. 8 and 9 are schematic diagrams of the system structure in the present invention, in which a control module, a position detection module 20 in communication with the control module, a driving module, and a charging module 30 are disposed in a housing.
Wherein: the position detection module 20 is used for detecting charging efficiency of different positions; the control module sends a driving signal to the driving module according to the optimal charging position coordinates determined by the detection information of the position detection module 20; after receiving the driving signal, the driving module drives the charging module 30 to move to an optimal charging position and sends a feedback signal; the charging module 30 is configured to receive the charging signal sent by the control module and charge the device to be charged.
The control module is internally provided with an MCU, a first detection unit, a space calculation unit, a drive control unit and a charging unit which are connected with the MCU, and the MCU, the first detection unit, the space calculation unit, the drive control unit and the charging unit are integrated on the circuit board 40. Wherein: the first detecting unit is configured to communicate with the position detecting module 20, drive the position detecting module 20 to perform optimal charging position detection, and receive a detection result of the position detecting module 20; the space calculating unit calculates and obtains the space coordinate of the optimal charging position according to the received detection result; the driving unit sends a driving signal to the driving module according to the coordinates of the optimal charging position; the charging unit sends a charging instruction to the charging module 30 after receiving a signal that the charging module 30 is moved into place.
As shown in fig. 3 and 4, the position detection module 20 detects charging efficiencies at different positions in the first direction and the second direction, respectively. Specifically, the detection area (i.e. the dotted line box S) is divided into a plurality of unit charging areas (S11, S12 … … S1 n) in the first direction (transverse direction in the figure), and the charging efficiency of each unit charging area (S1 x, x is 1, 2 … … n) is detected respectively; to the detection area (i.e. the dotted line box S) at the second sideThe charging efficiency of each unit charging area (S2 x, x is 1, 2 … … n) is detected by dividing the charging area (S21, S22, … … S2 n) into a plurality of unit charging areas (vertical in the figure). Based on this, the space calculating unit obtains the unit charging area (e.g., S1 a) of the optimal charge in the first direction and the unit charging area (e.g., S2b, a and b may be equal or unequal) of the optimal charge in the second direction, respectively, and finally n can be obtained 2 And combining the charging efficiencies of the space coordinates to obtain coordinates (S1 a, S2 b) of the optimal charging position in the whole monitoring area.
Because the position difference between the transmitting coil and the receiving coil can influence the charging efficiency in the magnetic induction process, the charging frequency and parasitic loss of the charging end can reflect the charging efficiency, and therefore the charging frequency and/or parasitic loss of each charging area in the first direction and the second direction are respectively detected to reflect the charging efficiency of different positions. Since the calculation method of the charging frequency and the parasitic loss is the prior art, the specific collection and calculation methods of the charging frequency and the parasitic loss are not described in detail herein.
As shown in fig. 2, in the present invention, the position detection module 20 includes a first direction wire frame 25 and a second direction wire frame 28, and the charging efficiency of each unit charging area in the first direction is obtained by moving the first direction wire frame 25, and the charging efficiency of each unit charging area in the second direction is obtained by moving the second direction wire frame 28. The first direction wire frame 25 is connected with the control module through a first switch, and the closing of the first direction wire frame 25 is controlled through the first switch; the second directional wire frame 28 is connected to the control module via a second switch, by which the closing of the second directional wire frame 28 is controlled.
In the process of detecting by the position detecting module 20, it is necessary to determine whether the charging efficiency of the position meets the basic requirement, and if the charging efficiency does not meet the basic requirement, the position is regarded as "disqualified".
The position detection module 20 comprises a detection driving component 21, a first direction wire frame 25 is connected with the detection driving component 21 through a rotary belt 24, and the detection driving component 21 drives the first direction wire frame 25 to move in a first direction through the rotary belt 24; the second direction wire frame 28 is connected to the detection driving part 21 through a screw 26, and the detection driving part 21 drives the second direction wire frame 28 to move in the second direction through the screw 26. The first direction is a lateral direction in the figure, the second direction is a longitudinal direction in the figure, and the definition of the first direction and the second direction is not strictly limited, and it is possible to set two detection directions intersecting each other.
In the present embodiment, the detection driving part 21 is a driving motor. Preferably, the drive motor is a stepping motor, and the first direction wire frame 25 and the second direction wire frame 28 can be moved stepwise from a start position to an end position. In cooperation with this, the detection signals connected to the first direction wire frame 25 and the second direction wire frame 28 are also step-by-step pulse signals, that is, detection is stopped when the step motor drives the first direction wire frame 25 and the second direction wire frame 28 to move. Preferably, the detecting driving part 21 is further connected with a forward and reverse limiting device, which is used for limiting the forward operation and the reverse operation of the detecting driving part 21, so as to ensure the normal operation of the detecting driving part 21, the first direction wire frame 25 and the second direction wire frame 28.
The output shaft of the driving motor is connected with the driving gear, the driving gear is connected with the rotary wheel 23 through the rotary belt 24, and when the driving motor rotates, the driving gear drives the rotary wheel 23 to rotate through the rotary belt 24. Specifically, the axis of the turning wheel 23 is parallel to the axis of the driving gear, and the connection line between the turning wheel 23 and the driving gear extends along the first direction. The first direction wire frame 25 is fixed to the revolving belt 24 and translates as the revolving belt 24 rotates. When the driving motor is in the original state, the first direction wire frame 25 is located at the start position of the detection area, and when the driving motor is operated to the final state, the first direction wire frame 25 is located at the end position of the detection area.
In this embodiment, the output shaft of the driving motor is further connected to the screw 26, the screw 26 extends along the second direction, and the wire frame fixing member 27 is sleeved on the screw 26, and the wire frame fixing member 27 is in screwed connection with the screw 26, so that the wire frame fixing member 27 translates when the screw 26 rotates. The second directional wire 28 is fixed to the wire mount 27 and translates as the wire mount 27 translates. The second direction wire frame 28 is located at the start position of the detection area when the driving motor is located at the original state, and the second direction wire frame 28 is located at the end position of the detection area when the driving motor is operated to the final state.
In the second direction, in order to ensure that the wire frame fixing member 27 translates with the rotation of the screw rod 26 without rotation in the axial direction of the screw rod 26, a limiting device for the wire frame fixing member 27 is provided inside the housing. The wire frame fixing member 27 may be a hollow cylinder or a hollow prism, which is not limited herein.
In order to ensure that the detection signals of the first direction wire frame 25 and the second direction wire frame 28 do not interfere with each other when the detection signals of the first direction wire frame 25 and the second direction wire frame 28 are respectively detected, a certain time delay can be arranged between the detection signals of the first direction wire frame 25 and the second direction wire frame 28; the first direction wire frame 25 may collect charging efficiency information when the detection driving part 21 drives the first direction wire frame 25 and the second direction wire frame 28 to move from the initial position to the final position, the second direction wire frame 28 does not collect signals, and after the first direction wire frame 25 is collected, the detection driving part 21 simultaneously drives the first direction wire frame 25 and the second direction wire frame 28 to move from the final position to the initial position, and in the process, the first direction wire frame 25 does not collect signals, and only the second direction wire frame 28 collects charging efficiency information.
In order to ensure that the first direction wire frame 25 and the second direction wire frame 28 can synchronously move from the start position to the end position, the width ratio of the first direction wire frame 25 to the width ratio of the second direction wire frame 28 can be selectively set to be consistent with the width ratio of the first direction to the width ratio of the second direction of the detection area; the pitch of the screw 26 and the stepping distance of the rotary belt 24 can be adjusted so that the ratio of the two is proper.
In order to ensure that the first direction wire frame 25 and the second direction wire frame 28 can move smoothly, a bearing frame 22 is arranged at the frame position of the detection area, the first direction wire frame 25 is arranged on the upper side of the bearing frame 22, the second direction wire frame 28 is arranged on the lower side of the bearing frame 22, and a supporting platform (the specific structure is not limited) of the second direction wire frame 28 is arranged; the second direction wire frame 28 may be disposed on the upper side of the carrying frame 22, the first direction wire frame 25 may be disposed on the lower side of the carrying frame 22, and a supporting platform (same as above) for the first direction wire frame 25 may be provided.
As shown in fig. 5, the driving module includes a first driving part 611 and a second driving part 621. Wherein the second driving part 621 is slidably connected to the driven end of the first driving part 611, and the first driving part 611 drives the first driving part 611 to slide in the second direction; the second driving part 621 is connected to the lower side of the charging module 30 in a limiting manner, and the charging module 30 is connected to the driving end of the second driving part 621 in a sliding manner, and the second driving part 621 drives the charging module 30 to slide in the first direction.
In a preferred embodiment, the drive module may also effect movement of the charging module 30 in a third direction. For example, the driving module may not only realize movement of the charging module 30 in the lateral direction (X direction) but also realize movement of the charging module in the longitudinal direction (Y direction), and further realize movement of the charging module in the vertical direction (Z direction), so as to adapt to different charging modes.
In this embodiment, the first driving member 611 is a first motor, an output shaft of the first motor is connected to the first transmission rod 612 (threaded rod), and the second driving member 621 is sleeved on the first transmission rod 612 and is in threaded connection with the first transmission rod. The first motor rotates to drive the first transmission rod 612 to rotate, and then drives the second driving part 621 to slide along the first transmission rod 612, that is, drives the second driving part 621 to move in the second direction. Preferably, the second driving part 621 is sleeved on the first transmission rod 612 through the driving sliding part 613, and a limiting structure (not described in detail herein) for limiting the rotation of the driving sliding part 613 is arranged inside the housing. In addition, in order to secure stable support of the first transmission rod 612, a support shaft 614 for supporting the first transmission rod 612 is provided at an end portion of the first transmission rod 612. Preferably, the first driving member 611 and the first transmission rod 612 are located at intermediate positions throughout the detection area.
In this embodiment, the second driving part 621 is a second motor, an output shaft of the second motor is connected to the second transmission rod 622 (threaded rod), and the second motor drives the charging module 30 to move in the first direction through the second transmission rod 622. Specifically, a transmission gear (not shown in the figure, the same applies to the following description) is disposed on the second transmission rod 622, a transmission rack (not shown in the figure, the same applies to the following description) matched with the transmission gear is disposed at the bottom of the charging module 30, and the transmission rack extends along the first direction, so that when the second motor rotates, the second transmission rod 622 drives the charging module 30 to move in the first direction sequentially through the transmission gear and the transmission rack.
Preferably, the first driving member 611 and the second driving member 621 are connected with bidirectional stoppers, which respectively limit bidirectional operations of the first driving member 611 and the second driving member 621.
The first direction corresponds to the movement direction of the first direction wire frame 25, and the second direction corresponds to the movement direction of the second direction wire frame 28; it is also possible to set the first direction and the first direction wire frame 25 not to coincide in the moving direction and the second direction wire frame 28 not to coincide in the moving direction, ensuring that the product can be realized mainly.
The movable range of the control charging module 30 in this embodiment covers the entire detection area. The length of the first transmission lever 612 and the length of the transmission rack can be set to satisfy the above-described requirements, and the specific setting method is not limited here, and this function may be achieved.
Example two
As shown in fig. 1, 8 and 9, unlike the first embodiment, a to-be-charged detection module connected to the control module is further disposed in the housing in this embodiment, and the to-be-charged detection module is configured to sense whether a to-be-charged device exists on the housing, and send the sensing result to the control module. The to-be-charged detection module detects whether to-be-charged equipment is positioned on the shell before charging operation, and avoids useless processes of subsequent detection and charging processes.
Correspondingly, a second detection unit connected with the MCU is arranged in the control module, and the second detection unit is used for communicating with the charging detection module, sending a detection instruction to be charged of the MCU to the detection module to be charged, and sending a detection result of the detection module to be charged to the MCU.
The to-be-charged detection module can be a gravity sensor, an infrared sensor, an electromagnetic sensor, a distance sensor, a touch sensor, a mechanical switch and the like which are positioned on the inner surface of the shell. Wherein:
the gravity sensor is used for sensing the gravity born by the surface of the shell, and if the equipment to be charged is placed on the shell, the gravity sensor detects the increase of the gravity, so that the equipment to be charged is judged. The infrared sensor is used for sensing infrared signals of the equipment to be charged, and if the infrared sensor detects that the corresponding infrared signals are the infrared signals, the equipment to be charged is judged. The electromagnetic sensor is used for detecting whether an electromagnetic signal exists outside the shell, and judging the equipment to be charged if the electromagnetic signal sent by the electromagnetic sensor obtains corresponding electromagnetic feedback. The distance sensor is used for detecting whether an object is located in a preset distance range on the surface of the shell, and if so, the device to be charged is judged to exist. The touch sensor and the mechanical switch are used for receiving an instruction of starting the charging of the human body and directly judging that the equipment to be charged exists.
Other sensing devices may be used in the to-be-charged detection module in this embodiment, which will not be described in detail herein.
Example III
As shown in fig. 1, 8 and 9, unlike the first embodiment, a temperature detection module connected to the control module is further provided in the housing in this embodiment, and the temperature detection module is configured to detect the temperature of the device to be charged and/or the charging module 30, and feed back the temperature value to the control module. The temperature detection module is used for detecting the temperature of the equipment to be charged and/or the charging module 30 at regular or irregular time, and early warning is carried out when the temperature of the equipment to be charged and/or the charging module 30 is higher than a corresponding preset value, and the operation process of the wireless charger is controlled through the control module.
Correspondingly, a third detection unit connected with the MCU is arranged in the control module and is used for communicating with the temperature detection module, sending a temperature detection instruction of the MCU to the temperature detection module and sending a detection result of the temperature detection module to the MCU.
The temperature detection module is a temperature measuring sheet attached to the surface of the shell and a temperature measuring sheet positioned beside the charging module 30. The temperature measuring sheet can be a thermocouple, a thermal resistor, a thermistor and the like; the temperature sensor may be a contact type temperature sensor or a non-contact type temperature sensor.
Example IV
As shown in fig. 1, 8 and 9, unlike the first embodiment, an indication module connected to the control module is further provided in the housing in this embodiment, where the indication module is configured to receive an instruction from the control module and display an operation status of the wireless charger.
Correspondingly, an indication unit connected with the MCU is arranged in the control module and is used for communicating with the indication module, sending a display instruction of the MCU to the indication module and displaying corresponding information on the indication module.
The indication module can be a display part 50 positioned on the outer surface of the shell, and the display part 50 is connected with the control module; the indication module may also be a display part 50 located inside the housing, where the display part 50 is connected to the control module, and the housing is made of transparent or semitransparent material (such as PP material, acryl material, etc.). When the contents such as the early warning information, the charging indication information, the power switch information and the like need to be displayed, the corresponding indication contents are displayed through the display part 50, so that the purpose of prompting a user is achieved.
The display part 50 in this embodiment is a display light bar located inside the housing, and the display light bar surrounds the side surface of the housing for a circle, and is provided with a notch for connection. The display light bar can display contents such as characters, arrows, gradual change lights and the like.
Example five
The charging module 30 may be a conventional charging module (including the magnetic shielding plate 31 and the charging coil 32), or an optimized charging module may be selected.
As shown in fig. 1, 6 and 7, unlike the conventional charging module, the charging module 30 in this embodiment includes a magnetic shielding plate 31 and a charging coil 32 located at one side of the magnetic shielding plate 31, and the height of the outer winding of the charging coil 32 is higher than the height of the adjacent inner winding, so that the charging coil 32 is formed in an inverted truncated cone shape around.
Preferably, the charging coils 32 on each side are surrounded by a central axis of the charging coils 32 to form an inclined bevel, which is at an angle of 3-6 ° to the magnetic shield 31. The inclination angle is set to 5 ° in this embodiment.
In the wireless charging process, the magnetic field distribution of the peripheral coil of the transmitting end is more dispersed than that of the inner peripheral coil, so that the magnetic field loss generated by the current of the peripheral coil is larger, and the charging efficiency of the whole transmitting coil is lowered. Therefore, the embodiment can effectively reduce the loss of the transmitting coil and increase the charging efficiency of the transmitting coil by changing the shape of the charging coil.
The invention is realized by dividing the detection area into n 2 Detecting the charging efficiency of the whole detection area in the same first direction and the second direction respectively to obtain an accurate and optimal charging position, and moving the charging module to the position through the determination of the optimal charging position coordinate to ensure that the charging efficiency of the charging module is highest; the detection mode can enable the detection result to be more accurate, is not easy to be influenced by the arrangement inclination of the electronic equipment, other structures and the like, and in addition, when the charging operation is carried out, the wire frames in two directions cannot influence the electronic equipment, so that the charging efficiency is fully ensured.
As shown in fig. 10 to 13, based on the above embodiments, the present invention further provides a method for implementing a wireless charger for automatic positioning of charging, which implements positioning of a receiving coil in a device to be charged by using the wireless charger for automatic positioning of charging, and moves a charging module to a suitable position, thereby reducing loss in a wireless charging process, increasing charging efficiency, reducing temperature rise of the device to be charged and the wireless charger, increasing interactivity, and guaranteeing reliability of the charging process.
As shown in fig. 10, the implementation method in one embodiment of the present invention includes the following steps:
s1, detecting and judging whether charging equipment exists in a detection area through mutual matching of a to-be-charged detection module and a control module, and starting a subsequent charging detection and charging process only when the charging equipment exists in the detection area. The detection area here is an area range in which the first direction wire frame and the second direction wire frame are movable and detected.
S2, if the detection area is judged to have the charging equipment, the detection area is periodically scanned through the position detection module, and the coordinates of the optimal charging position are determined through the space calculation unit in the control module, so that the optimal charging efficiency is obtained.
S3, the control module drives the charging module to move to an optimal charging position through the driving module. Specifically, the first driving component drives the charging module and the second driving component to move in the second direction, and the second driving component drives the charging module to move in the first direction. The movement of the charging module in the first direction and the movement in the second direction may be performed sequentially or simultaneously.
And S4, judging whether the charging module moves to an optimal charging position or not, and sending a feedback signal to the control module after the charging module moves in place. The charging module can also send position information to the control module at fixed time in the moving process, so that the control module can conveniently acquire the position of the charging module.
And S5, if the charging module is judged to move in place (or the control module receives a feedback signal that the charging module moves in place), the charging unit in the control module is communicated with the charging module, so that the charging module starts to charge the equipment to be charged, and otherwise, the charging module is continuously driven to shift. In the charging process, the wire frames in all directions are disconnected, so that the corresponding induced current is avoided, and the influence of the wire frames on the charging efficiency is reduced.
As shown in fig. 11, the implementation method in another embodiment of the present invention is similar to the above embodiment, and differs only in that a specific identification procedure of the optimal charging position is included. The method specifically comprises the following steps:
s1, detecting and judging whether charging equipment exists in the detection area.
The detection and determination may be performed periodically based on a fixed value that is set, or may be performed by itself when the wireless charger is started. In this embodiment, an on-off key is provided on the housing, and the on-off key is connected to an on-off button on the circuit board for turning on and off the wireless charger.
And S2, if the charging equipment is arranged, periodically scanning the detection area, and determining the coordinates of the optimal charging position.
The identification process of the optimal charging position comprises the following steps:
S2A, after determining the optimal charging position, judging whether the optimal charging position is positioned in a movable area of the charging module;
S2B, if the optimal charging position is located in a movable area of the charging module, performing step S3; and if the optimal charging position is located outside the movable area of the charging module, sending out alarm information and ending the charging process.
S3, the control module drives the charging module to move to an optimal charging position through the driving module.
And S4, after the charging module moves in place, starting charging operation.
As shown in fig. 12 and 13, in the above two embodiments, the detection area is periodically scanned by the position detection module, and the coordinates of the optimal charging position are obtained by calculation by the control module. In the process, the first direction coil scans the charging efficiency of the detection area in the first direction, the second direction coil scans the charging efficiency of the detection area in the second direction, and the unit charging areas with optimal charging in the two directions are obtained respectively and then overlapped to obtain the specific coordinate position of the optimal charging area.
In the specific implementation shown in fig. 12:
s201, in the position detection module, the driving device drives the first direction wire frame and the second direction wire frame to move to the starting end respectively. In this embodiment, the detection driving component drives the first direction wire frame to move to the leftmost end, and the second direction wire frame to move to the uppermost end.
And S202, electrifying the first direction wire frame and the second direction wire frame, simultaneously moving the first direction wire frame and the second direction wire frame towards the terminal end, and acquiring the charging efficiency (magnetic induction efficiency, such as detection of charging frequency and parasitic loss) of each unit charging area in the moving process. The first direction wire frame and the second direction wire frame can be electrified and powered off in a crossing way; one direction wire frame is electrified in the process that the detection driving part drives the first direction wire frame and the second direction wire frame to move forward (the first direction wire frame moves rightwards and the second direction wire frame moves downwards) at the same time, and the other direction wire frame is electrified in the process that the detection driving part drives the first direction wire frame and the second direction wire frame to move reversely (the first direction wire frame moves leftwards and the second direction wire frame moves upwards) at the same time.
And S203, after the position detection module circularly detects a complete stroke, the control module obtains the coordinates of the optimal unit charging area in the first direction and the coordinates of the optimal charging area in the second direction, and the coordinates of the optimal charging position in the whole detection area are obtained by superposition of the first coordinates and the second coordinates.
In the specific implementation process shown in fig. 13, in order to avoid the influence of the charging coil in the charging module on the detection structure in the detection process of the first direction wire frame and the second direction wire frame, the charging module needs to be detected in stages, and is shifted in different stages, so that the charging module cannot generate more interference on the detection result.
The specific implementation process is as follows:
s201, setting the whole detection area to comprise four detection areas of upper right, upper left, lower left and lower right, wherein the four detection areas respectively correspond to a first quadrant, a second quadrant, a third quadrant and a fourth quadrant. Initially, the driving module drives the charging module to move to a lower right position (i.e., a fourth quadrant), preferably a lower right corner position.
In the position detection module, the driving device drives the first direction wire frame and the second direction wire frame to move to the starting end respectively. In this embodiment, the detection driving component drives the first direction wire frame to move to the leftmost end, and the second direction wire frame to move to the uppermost end.
S202, energizing the first direction wire frame and the second direction wire frame, and moving the first direction wire frame and the second direction wire frame toward the end point (the midpoint position of the detection area in this embodiment) at the same time, and acquiring the charging efficiency (magnetic induction efficiency, such as detecting the charging frequency and parasitic loss) of each unit charging area during the movement.
S203, judging whether the first direction wire frame and the second direction wire frame move to a half stroke or not, or identifying whether the first direction wire frame and the second direction wire frame are received or not, sending an in-place signal to the control module when the first direction wire frame and the second direction wire frame move to the half stroke, and continuing to move and detect if the first direction wire frame and the second direction wire frame do not reach the half stroke.
S204, if the first direction wire frame and the second direction wire frame reach a half stroke, respectively powering off the first direction wire frame and the second direction wire frame, and stopping the detection driving part to drive the first direction wire frame and the second direction wire frame to move.
S205, the driving module drives the charging module to move to the upper left position (namely the second quadrant), preferably the upper left position.
S206, judging whether the charging module moves to the second quadrant or not, or recognizing whether a feedback signal is received after the charging module moves to the second quadrant to be in place, and if the charging module does not move to be in place, continuing to move.
S207, if the charging module moves in place, the first direction wire frame and the second direction wire frame continue the moving and detecting processes, as shown in step S202.
S208, judging whether the detection of the whole stroke is finished, if not, continuing to step S207.
S208, after the position detection module circularly detects a complete stroke, the control module obtains the coordinates of the optimal unit charging area in the first direction and the coordinates of the optimal charging area in the second direction, and the coordinates of the optimal charging position in the whole detection area are obtained by superposition of the first coordinates and the second coordinates.
In the whole process, the first direction wire frame and the second direction wire frame can be electrified and powered off in a crossing way; one direction wire frame is electrified in the process that the detection driving part drives the first direction wire frame and the second direction wire frame to move forward (the first direction wire frame moves rightwards and the second direction wire frame moves downwards) at the same time, and the other direction wire frame is electrified in the process that the detection driving part drives the first direction wire frame and the second direction wire frame to move reversely (the first direction wire frame moves leftwards and the second direction wire frame moves upwards) at the same time. Or, the detection driving part can drive the first direction wire frame and the second direction wire frame to move forward (the first direction wire frame moves rightwards and the second direction wire frame moves downwards) to electrify one wire frame in the front half stroke process, electrify the other wire frame in the back half stroke process, and drive the first direction wire frame and the second direction wire frame to move reversely (the first direction wire frame moves leftwards and the second direction wire frame moves upwards) to electrify one wire frame in the front half stroke process and electrify the other wire frame in the back half stroke process.
It will be understood that modifications and variations will be apparent to those skilled in the art from the foregoing description, and it is intended that all such modifications and variations be included within the scope of the following claims.
While the invention has been described above with reference to the accompanying drawings, it will be apparent that the implementation of the invention is not limited by the above manner, and it is within the scope of the invention to apply the inventive concept and technical solution to other situations as long as various improvements made by the inventive concept and technical solution are adopted, or without any improvement.
Claims (8)
1. The wireless charger capable of automatically positioning during charging comprises a shell, and is characterized in that a control module, a position detection module communicated with the control module, a driving module and a charging module are arranged in the shell,
the position detection module is used for detecting charging efficiency values of different positions, the position detection module comprises a detection driving part, a first direction wire frame and a second direction wire frame, the first direction wire frame is connected with the detection driving part through a rotary belt, the detection driving part drives the first direction wire frame to move in the first direction through the rotary belt, the second direction wire frame is connected with the detection driving part through a screw rod, the detection driving part drives the second direction wire frame to move in the second direction through the screw rod, the charging efficiency of each unit charging area in the first direction is respectively obtained through moving the first direction wire frame, and the charging efficiency of each unit charging area in the second direction is respectively obtained through moving the second direction wire frame;
the control module determines the optimal charging position coordinate according to the detection information of the position detection module and sends a driving signal to the driving module;
after receiving the driving signal, the driving module drives the charging module to move to an optimal charging position and sends a feedback signal;
the charging module is used for receiving the charging signal sent by the control module and charging equipment to be charged, the charging module comprises a magnetic isolation plate and a charging coil arranged on one side of the magnetic isolation plate, the height of an outer winding of the charging coil is higher than that of an adjacent inner winding of the charging coil, the charging coil surrounds an inverted round table, a central axis of the charging coil is taken as a boundary, the charging coil on each side surrounds an inclined bevel edge, and the included angle between the bevel edge and the magnetic isolation plate is 3-6 degrees.
2. The automatic charging positioning wireless charger according to claim 1, wherein the control module is internally provided with an MCU, a first detection unit connected with the MCU, a space calculation unit, a driving control unit and a charging unit:
the first detection unit is used for communicating with the position detection module, driving the position detection module to perform optimal charging position detection, and receiving a detection result of the position detection module;
the space calculating unit calculates and obtains the space coordinate of the optimal charging position according to the received detection result;
the driving control unit sends a driving signal to the driving module according to the coordinates of the optimal charging position;
and the charging unit sends a charging instruction to the charging module after receiving the signal that the charging module moves in place.
3. The automatic charging positioning wireless charger according to claim 1, wherein a to-be-charged detection module connected with the control module is further arranged in the shell, and the to-be-charged detection module is used for sensing whether to-be-charged equipment exists on the shell and sending a sensing result to the control module.
4. The automatic charging positioning wireless charger according to claim 1, wherein a temperature detection module connected with a control module is further arranged in the housing, and the temperature detection module is used for detecting the temperature of equipment to be charged and/or the charging module and feeding back a temperature value to the control module.
5. The automatic charging positioning wireless charger according to claim 1, wherein an indication module connected with the control module is further arranged in the shell, and the indication module is used for receiving the instruction of the control module and displaying the running condition of the wireless charger.
6. A method of implementing a charging auto-positioning wireless charger as defined in any one of claims 1-5, comprising the steps of:
s1, detecting and judging whether charging equipment exists in a detection area;
s2, if charging equipment is arranged, periodically scanning the detection area, and determining the coordinates of the optimal charging position;
s3, the control module drives the charging module to move to an optimal charging position through the driving module;
and S4, after the charging module moves in place, starting charging operation.
7. The method according to claim 6, wherein in step S2, after determining the optimal charging position, it is determined whether the optimal charging position is located in a movable area of the charging module, if so, the next step is performed, if the optimal charging position is located outside the movable area of the charging module, an alarm message is sent, and the charging process is terminated.
8. The method for implementing the automatic charging positioning wireless charger according to claim 6 or 7, wherein in step S2, the detection area is periodically scanned by the position detection module, and the coordinates of the optimal charging position are obtained by calculation by the control module, which comprises the following steps:
in the position detection module, the first direction wire frame and the second direction wire frame respectively move to the starting end;
the first direction wire frame and the second direction wire frame move towards the terminal end at the same time, and the charging efficiency of each unit charging area is obtained in the moving process;
the control module obtains the coordinates of the optimal unit charging area in the first direction and the coordinates of the optimal charging area in the second direction, and the coordinates of the optimal charging position in the whole detection area are obtained by superposition of the first coordinates and the second coordinates.
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| CN107689661A (en) * | 2017-10-27 | 2018-02-13 | 珠海市魅族科技有限公司 | Wireless charging device and wireless charging method |
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| CN109462286A (en) * | 2018-09-30 | 2019-03-12 | 漳州蒙发利创新科技有限公司 | A kind of wireless charger automatically correcting charge position |
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