CN112886723A - 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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- 230000005389 magnetism Effects 0.000 claims description 4
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- 230000005674 electromagnetic induction Effects 0.000 description 3
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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, which belong to the technical field of wireless charging. The invention saves the energy consumption to the maximum extent, ensures the service life of the wireless charger and the electronic equipment, ensures the charging reliability 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 charging technology) is widely used in various industries, and a Wireless charger is a common charging device in daily life. The wireless charger utilizes the principle of electromagnetic induction, and the electromagnetic induction between primary and secondary coil produces electric current to realize the transmission of energy in space range, make between charger and the power consumption device with magnetic field transfer energy, and then realize contactless propagation.
When electronic equipment such as a mobile phone is charged by using a wireless charger, because the placement positions of the electronic equipment are uncertain, and the positions of receiving coils of different types of electronic equipment are different, the receiving coils and a transmitting coil in the wireless charger inevitably have position offset, so that the positions of the receiving coils and the transmitting coil are not corresponding. However, such an inconsistency may cause a phenomenon that charging is impossible or transmission efficiency is reduced during charging, which not only causes energy loss, but also affects 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 wireless charger to correspond to the position of the electronic device becomes one of the important research points of the wireless charger.
In order to solve the above problems, some wireless chargers have a structure in which coils are automatically aligned, for example, chinese patent publication No. CN 107370244 a discloses a magnetic coil position detection apparatus and a position detection method for electromagnetic induction type wireless charging. The three coils are used for respectively measuring induced electromotive force, and then the moving positions of the coils are determined according to the proportional relation of the induced electromotive force among the three coils. However, such a detection method has a large error, and if the electronic device is tilted or is interfered by another device, a detection result of such a detection method has a large error. This detection method can only determine the position where the three coils are relatively balanced, and if the charging efficiency at this position does not meet the basic requirement, the charging efficiency is reduced and the heat generation is increased. In addition, the three coils at the periphery also affect the moving range of the middle transmitting coil, which has space limitation.
The above-mentioned drawbacks 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:
a wireless charger capable of automatically positioning during charging comprises a shell, and is characterized in that a control module, a position detection module, a driving module and a charging module which are communicated with the control 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 the 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 device to be charged.
The invention according to the above 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 which are connected with the MCU:
the first detection unit is used for communicating with the position detection module, driving the position detection module to carry out optimal charging position detection and receiving a detection result of the position detection module;
the space calculation unit calculates 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 coordinate 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 present invention according to the above aspect is characterized in that the position detection module includes 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.
The invention according to the above scheme is characterized in that the charging module comprises a magnetism isolating plate and a charging coil positioned on one side of the magnetism isolating plate, wherein the height of an outer layer winding of the charging coil is higher than that of an adjacent inner layer winding, so that the charging coil forms an inverted circular truncated cone shape in a surrounding manner.
The invention according to the scheme is characterized in that a detection module to be charged, which is connected with the control module, is further arranged in the shell, and the detection module to be charged is used for sensing whether the equipment to be charged exists on the shell or not and sending a sensing result to the control module.
The invention according to the scheme is characterized in that a temperature detection module connected with the control module is further arranged in the shell, and the temperature detection module is used for detecting the temperature of the equipment to be charged and/or the charging module and feeding back the temperature value to the control module.
The invention according to the scheme is characterized in that an indicating module connected with the control module is further arranged in the shell, and the indicating module is used for receiving instructions of the control module and displaying the running condition of the wireless charger.
On the other hand, the implementation method of the wireless charger capable of automatically positioning charging is characterized by comprising the following steps of:
s1, detecting and judging whether charging equipment exists in the detection area;
s2, if the charging equipment exists, periodically scanning the detection area, and determining the coordinate of the optimal charging position;
s3, the control module drives the charging module to move to the optimal charging position through the driving module;
and S4, after the charging module moves to the right position, starting to perform charging operation.
The present invention according to the above aspect is characterized in that, in step S2, after the optimal charging position is determined, 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, and if the optimal charging position is located outside the movable area of the charging module, an alarm message is sent out, and the charging process is ended.
The present invention according to the above aspect is characterized in that, in step S2, the position detection module periodically scans the detection area, and the control module calculates and obtains the coordinates of the optimal charging position, and the specific process includes:
in the position detection module, a first direction wire frame and a second direction wire frame are respectively moved 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 coordinate of the optimal unit charging area in the first direction and the coordinate of the optimal charging area in the second direction, and the coordinate of the optimal charging position in the whole detection area is obtained by superposing the first coordinate and the second coordinate.
The present invention according to the above-described aspects has an advantageous effect in that the present invention divides the detection region into n2The charging efficiency of the whole detection area is detected in the small area and in the first direction and the second direction respectively, so that an accurate and optimal charging position is obtained, and the charging module is moved to the position through the determination of the optimal charging position coordinate, so that the charging efficiency of the charging module is highest; this kind of detection mode can make the testing result more accurate, and is difficult for receiving electronic equipment to put the influence etc. of slope, other structures, in addition, when the operation of charging, the wire frame of two directions can not cause the influence to it, fully guarantees charge efficiency.
Although the internal detection assembly and the charging moving assembly are additionally arranged, the internal space occupation is saved to the greatest extent, the energy consumed for detection and moving is smaller than the energy consumed for nonresponse of charging, the energy consumption is saved to the greatest extent, the service lives of the wireless charger and the electronic equipment are ensured, the charging reliability is ensured, and the equipment interactivity is strong.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural diagram of a position detection module according to the present invention;
FIG. 3 is a schematic diagram of an implementation of the home position of the position detection module according to the present invention;
FIG. 4 is a schematic diagram of an implementation of the intermediate position of the position detection module of the present invention;
FIG. 5 is a schematic structural diagram of a driving module according to the present invention;
FIG. 6 is a schematic structural diagram of a charging module according to the present invention;
fig. 7 is a side 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 an implementation of another embodiment of the present invention;
FIG. 12 is a flow chart illustrating an implementation of determining optimal charging location coordinates in accordance with an embodiment of the present invention;
fig. 13 is a flow chart illustrating an implementation of determining the optimal charging position coordinates according to another embodiment of the present invention.
In the figure, 11-upper shell; 12-a lower shell; 121-a fastening part;
20-a position detection module; 21-detecting the drive member; 22-a carrier frame; 23-a turret wheel; 24-a rotary belt; 25-first directional wireframe; 26-screw rod; 27-a wire frame fixture; 28-second directional wireframe;
30-a charging module; 31-a magnetic shield; 32-a charging coil;
40-a circuit board;
50-a display member;
611 — a first drive member; 612-a first transfer lever; 613-driving the slide; 614-support shaft; 621-a second drive member; 622-second transmission rod.
Detailed Description
The invention is further described with reference to the following figures and embodiments:
as shown in fig. 1 to 13, a wireless charger capable of automatically positioning during charging is used for charging a wireless charging device, wherein the wireless charging device is an electronic device with a receiving coil, and comprises a mobile phone, a tablet computer, an intelligent bracelet, an electric hair drier, an intelligent water cup, an electric kettle and the like. According to the invention, the receiving coil in the wireless charging equipment 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 charging module 30 on the wireless charging equipment is increased, the temperature rise of the wireless charger and the wireless charging equipment is reduced, the reliability of the charging process is ensured, and the interactivity of wireless charging is increased.
Example one
The utility model provides a wireless charger of automatic positioning charges includes the casing, and the casing is used for supporting all mechanisms inside to provide wireless charging equipment's charging platform.
Fig. 1 is a detailed structural view of an embodiment of the present invention, and in the embodiment shown in fig. 1, the housing includes an upper housing 11 and a lower housing 12, and the upper housing 11 and the lower housing 12 are snap-fit connected. In this embodiment, a fastening portion 121 for matching with the upper case 11 is provided in the lower case 12, and the upper case 11 is fastened in the fastening portion 121. The specific shape and size of the housing may be customized as desired and is not limited in detail herein.
Fig. 8 and 9 are schematic diagrams of a system structure according to the present invention, in which a control module, a position detection module 20 communicating with the control module, a driving module, and a charging module 30 are disposed in a housing of the present invention.
Wherein: the position detection module 20 is used for detecting the charging efficiency 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 20; after receiving the driving signal, the driving module drives the charging module 30 to move to the 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.
In cooperation with the MCU, the first detection unit, the space calculation unit, the driving control unit and the charging unit are arranged in the control module, and the MCU, the first detection unit, the space calculation unit, the driving control unit and the charging unit are all integrated on the circuit board 40. Wherein: the first detection unit is used for communicating with the position detection module 20, driving the position detection module 20 to perform optimal charging position detection, and receiving a detection result of the position detection module 20; the space calculation unit calculates 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 coordinate of the optimal charging position; after receiving the signal that the charging module 30 moves in place, the charging unit sends a charging instruction to the charging module 30.
As shown in fig. 3 and 4, the position detection module 20 detects charging efficiencies of different positions in a first direction and a second direction, respectively. Specifically, the detection area (i.e., the dashed box S) is divided into a plurality of unit charging areas (S11, S12 … … S1 n) in the first direction (in the lateral direction in the figure), and the charging efficiency of each unit charging area (S1 x, x is 1, 2 … … n) is detected respectively; the detection area (i.e., the dotted line frame S) is divided into a plurality of unit charging areas (S21, S22 … … S2 n) in the second direction (vertical direction in the figure), and the charging efficiency of each unit charging area (S2 x, x is 1, 2 … … n) is respectively detected. Based on this, the space calculating unit obtains the unit charging area (e.g., S1 a) for the optimal charging in the first direction and the unit charging area (e.g., S2b, a and b may be equal or unequal) for the optimal charging in the second direction, respectively, and finally n may be obtained2The charging efficiencies of the respective spatial coordinates are combined, and the coordinates of the optimum charging position within the entire monitoring area are obtained (S1 a, S2 b).
In the process of magnetic induction between the transmitting coil and the receiving coil, the position difference between the transmitting coil and the receiving coil can influence the charging efficiency, and the charging frequency and the parasitic loss of the charging end can reflect the charging efficiency, so that the charging frequency and/or the 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 charging frequency and the parasitic loss are calculated by the prior art, the two specific acquisition and calculation methods are not described in detail here.
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 respectively acquired by moving the first direction wire frame 25, and the charging efficiency of each unit charging area in the second direction is respectively acquired 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 first switch is used for controlling the closing of the first direction wire frame 25; the second direction wire frame 28 is connected to the control module through a second switch, and the second switch controls the closing of the second direction wire frame 28.
In the process of detection by the position detection module 20, it is necessary to determine whether the charging efficiency of the position meets the basic requirement, and if not, the position is considered to be "unqualified".
The position detection module 20 comprises a detection driving part 21, a first direction wire frame 25 is connected with the detection driving part 21 through a rotary belt 24, and the detection driving part 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 member 21 through the screw 26, and the detection driving member 21 drives the second direction wire frame 28 to move in the second direction through the screw 26. Here, the first direction is a lateral direction in the drawing, the second direction is a longitudinal direction in the drawing, and the definition of the first direction and the second direction is not strictly limited, and it is possible to set both mutually intersecting detection directions.
In the present embodiment, the detection drive part 21 is a drive 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 in steps from the start position to the end position. In conjunction with this, the detection signal connected to the first direction wire frame 25 and the second direction wire frame 28 is also a step pulse signal, that is, when the stepping motor drives the first direction wire frame 25 and the second direction wire frame 28 to move, the detection is stopped. Preferably, the detection driving member 21 is further connected with a forward and reverse limiting device for limiting the forward operation and the reverse operation of the detection driving member 21 and ensuring the normal operation of the detection driving member 21, the first direction wire frame 25 and the second direction wire frame 28.
The output shaft of driving motor connects with the driving gear, and the driving gear connects with the rotary wheel 23 through the rotary belt 24, 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 rotary wheel 23 is parallel to the axis of the driving gear, and a connection line between the rotary wheel 23 and the driving gear extends along the first direction. The first directional wire frame 25 is fixed to the rotary belt 24 and translates as the rotary belt 24 rotates. The first-direction wire frame 25 is located at the start position of the detection region when the driving motor is in the original state, and the first-direction wire frame 25 is located at the end position of the detection region when the driving motor is operated to the final state.
In this embodiment, the output shaft of the driving motor is further connected to a screw rod 26, the screw rod 26 extends along the second direction, a wire frame fixing member 27 is sleeved on the screw rod 26, and the wire frame fixing member 27 is spirally connected to the screw rod 26, so that the wire frame fixing member 27 translates when the screw rod 26 rotates. The second directional wire frame 28 is fixed to the wire frame fixture 27 and translates as the wire frame fixture 27 translates. The second direction wire frame 28 is located at the start position of the detection region when the drive motor is in the initial state, and the second direction wire frame 28 is located at the end position of the detection region when the drive motor is operated to the final state.
In the second direction, in order to ensure that the wire frame fixing member 27 can translate along with the rotation of the screw 26 and the rotation of the screw 26 in the axial direction cannot occur, a limiting device for the wire frame fixing member 27 is arranged inside the casing. 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 first direction wire frame 25 and the second direction wire frame 28 are detected respectively, a certain delay may exist between the detection signals of the first direction wire frame 25 and the second direction wire frame 28; alternatively, when the detection driving part 21 drives the first direction wire frame 25 and the second direction wire frame 28 to move from the start position to the end position, the first direction wire frame 25 collects the charging efficiency information, the second direction wire frame 28 does not collect the signal, after the collection of the first direction wire frame 25 is completed, the detection driving part 21 simultaneously drives the first direction wire frame 25 and the second direction wire frame 28 to move from the end position to the start position, and in this process, the first direction wire frame 25 does not collect the signal, and only the second direction wire frame 28 collects the charging efficiency information.
In order to ensure that the first direction wire frame 25 and the second direction wire frame 28 can be synchronously moved 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 may be selectively set to be equal to the width ratio of the detection region in the first direction to the width ratio in the second direction; the pitch of the screw 26 and the stepping distance of the rotary belt 24 can be adjusted to make the ratio of the two suitable.
In order to ensure that the first direction wire frame 25 and the second direction wire frame 28 can both move smoothly, the 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 support platform of the second direction wire frame 28 is arranged (the specific structure is not limited); it is also possible to dispose the second directional wire frame 28 on the upper side of the carrier frame 22, dispose the first directional wire frame 25 on the lower side of the carrier frame 22, and dispose the support platform of the first directional wire frame 25 (the same as above).
As shown in fig. 5, the driving module includes a first driving part 611 and a second driving part 621. 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, the charging module 30 is slidably connected to the driving end of the second driving part 621, and the second driving part 621 drives the charging module 30 to slide in the first direction.
In a preferred embodiment, the driving module may also realize the movement of the charging module 30 in the third direction. For example, the driving module can realize the movement of the charging module 30 not only in the lateral direction (X direction), but also in the longitudinal direction (Y direction), and more in the vertical direction (Z direction), so as to adapt to different charging manners.
In this embodiment, the first driving member 611 is a first motor, an output shaft of the first motor is connected to the first driving rod 612 (threaded rod), and the second driving member 621 is sleeved on the first driving rod 612 and is in threaded connection therewith. The first motor rotates to drive the first driving rod 612 to rotate, and further drives the second driving part 621 to slide along the first driving rod 612, that is, the second driving part 621 is driven to move in the second direction. Preferably, the second driving part 621 is sleeved on the first driving 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 provided inside the housing. In addition, in order to ensure stable support of the first driving lever 612, a support shaft 614 for supporting the first driving lever 612 is provided at an end portion of the first driving lever 612. Preferably, the first driving part 611 and the first driving lever 612 are both located at the middle position of the entire sensing area.
In this embodiment, the second driving part 621 is a second motor, an output shaft of the second motor is connected to a second transmission rod 622 (a 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 drawings, the same below) is disposed on the second transmission rod 622, a transmission rack (not shown in the drawings, the same below) 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 sequentially passes through the transmission gear and the transmission rack to drive the charging module 30 to move in the first direction.
Preferably, a bidirectional limiting member is connected to each of the first driving member 611 and the second driving member 621, and limits bidirectional operation of the first driving member 611 and the second driving member 621, respectively.
Here, the first direction coincides with the moving direction of the first direction wire frame 25, and the second direction coincides with the moving direction of the second direction wire frame 28; the first direction may not be the same as the moving direction of the first direction wire frame 25, and the second direction may not be the same as the moving direction of the second direction wire frame 28, so as to ensure that the product can be realized mainly.
The movable range of the charging module 30 is controlled to cover the entire detection area in this embodiment. The length of the first driving rod 612 and the length of the driving rack may be set to satisfy the above requirements, and the function may be implemented without specific setting.
Example two
As shown in fig. 1, 8, and 9, a difference from the first embodiment is that a to-be-charged detection module connected to a control module is further disposed in the housing of the first embodiment, and the to-be-charged detection module is configured to sense whether a device to be charged is present on the housing, and send a sensing result to the control module. The detection module that waits to charge detects whether the equipment that waits to charge is located on the casing before carrying out the operation of charging, avoids follow-up detection and the useless process of charging process.
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 substitute 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 detection module to be charged 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 gravity borne by the surface of the shell, and if the device to be charged is placed on the shell, the gravity sensor detects that the gravity is increased, and then the device to be charged is judged. The infrared sensor is used for sensing an infrared signal of the equipment to be charged, and if the infrared sensor detects that the corresponding infrared signal is positive, the equipment to be charged is judged. The electromagnetic sensor is used for detecting whether an electromagnetic signal exists outside the shell or not, and if the electromagnetic signal sent by the electromagnetic sensor obtains corresponding electromagnetic feedback, the device to be charged is judged. 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 yes, the existence of the equipment to be charged is judged. The touch sensor and the mechanical switch are used for receiving a command of starting charging of a human body and directly judging that the device to be charged exists.
The detection module to be charged in this embodiment may also be another sensing device, which is not described in detail herein.
EXAMPLE III
As shown in fig. 1, 8, and 9, different from the first embodiment, a temperature detection module connected to the control module is further disposed in the housing of the first embodiment, and the temperature detection module is configured to detect a temperature of the device to be charged and/or the charging module 30, and feed back a 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 time or irregular time, giving an early warning when the temperature of the equipment to be charged and/or the charging module 30 is higher than a corresponding preset value, and controlling the operation process of the wireless charger through the control module.
Correspondingly, a third detection unit connected with the MCU is arranged in the control module and 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 measurement piece attached to the surface of the shell and a temperature measurement piece located beside the charging module 30. The temperature measuring sheet can be selected from 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 four
As shown in fig. 1, 8, and 9, different from the first embodiment, an indication module connected to the control module is further disposed in the housing of the first embodiment, and the indication module is configured to receive an instruction from the control module and display an operation status of the wireless charger.
Correspondingly, an indicating unit connected with the MCU is arranged in the control module and used for communicating with the indicating module, sending a display instruction of the MCU to the indicating module and displaying corresponding information on the indicating 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, the display part 50 is connected to the control module, and the housing is made of transparent or translucent material (such as PP material, acrylic 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 the user is achieved.
The display component 50 in this embodiment is a display light bar located inside the housing, which surrounds the side of the housing for a circle and is provided with a notch for connecting wires. The display light bar can display contents such as characters, arrows, gradient light and the like.
EXAMPLE five
The charging module 30 may be a conventional charging module (including a magnetic isolation plate 31 and a charging coil 32), or an optimized charging module.
As shown in fig. 1, 6 and 7, unlike the conventional charging module, the charging module 30 in this embodiment includes a magnetic shield 31 and a charging coil 32 located on one side of the magnetic shield 31, and the height of the outer winding in the charging coil 32 is higher than that of the adjacent inner winding, so that the charging coil 32 forms an inverted circular truncated cone shape around the inner winding.
Preferably, the charging coil 32 on each side is surrounded by a beveled edge forming an angle of 3-6 ° with the magnetic shield 31, around the central axis of the charging coil 32. The inclination angle is set to 5 ° in the present embodiment.
In the wireless charging process, the magnetic field distribution of the peripheral coil at the transmitting end is dispersed compared with the magnetic field distribution of the inner peripheral coil, so that the magnetic field loss generated by the current of the peripheral coil is large, and the charging efficiency of the whole transmitting coil is reduced. Therefore, the present 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 divides the detection area into n2The charging efficiency of the whole detection area is detected in the small area and in the first direction and the second direction respectively, so that an accurate and optimal charging position is obtained, and the charging module is moved to the position through the determination of the optimal charging position coordinate, so that the charging efficiency of the charging module is highest; this kind of detection mode can make the testing result more accurate, and is difficult for receiving electronic equipment to put the influence etc. of slope, other structures, in addition, when the operation of charging, the wire frame of two directions can not cause the influence to it, fully guarantees charge efficiency.
As shown in fig. 10 to 13, based on the above embodiments, the present invention further provides a method for implementing a wireless charger with automatic charging positioning, which uses the above wireless charger with automatic charging positioning to implement positioning of a receiving coil in a device to be charged, 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 ensuring 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, through the mutual cooperation of the detection module to be charged and the control module, whether charging equipment exists in the detection area is detected and judged, and the subsequent charging detection and charging process is started only when the charging equipment exists in the detection area. The detection region here is a region range in which the first direction wire frame and the second direction wire frame are movable and detected.
And S2, if the charging equipment exists in the detection area, periodically scanning the detection area through the position detection module, and determining the coordinate of the optimal charging position through the space calculation unit in the control module so as to obtain the optimal charging efficiency.
And S3, the control module drives the charging module to move to the optimal charging position through the driving module. Specifically, the first driving part drives the charging module and the second driving part to move in the second direction, and the second driving part drives the charging module to move in the first direction. The movement of the charging module in the first direction and the movement of the charging module in the second direction may be performed sequentially or simultaneously.
And S4, judging whether the charging module moves to the optimal charging position or not, or sending a feedback signal to the control module after the charging module moves to the proper position. The charging module can also send position information to the control module at regular 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), controlling the charging unit in the control module to communicate with the charging module, so that the charging module starts to charge the equipment to be charged, otherwise, the charging module is continuously driven to shift. In the charging process, the wire frames in all directions are disconnected, so that the generation of corresponding induced currents is avoided, and the influence of the wire frames on the charging efficiency is further reduced.
As shown in fig. 11, the implementation method in another embodiment of the present invention is similar to the above embodiment, and only differs in that a specific identification process of the optimal charging position is included. The method specifically comprises the following steps:
and S1, detecting and judging whether a charging device exists in the detection area.
The detection and judgment can be carried out regularly according to a set fixed value, and the wireless charger can also run automatically when being started. In this embodiment, a switch key is arranged on the housing, and the switch key is connected with a switch button on the circuit board and used for turning on and off the wireless charger.
And S2, if the charging equipment exists, periodically scanning the detection area and determining the coordinate of the optimal charging position.
The identification process of the optimal charging position includes:
S2A, after the optimal charging position is determined, judging whether the optimal charging position is located in a movable area of the charging module;
S2B, if the optimal charging position is located in the movable area of the charging module, the step S3 is carried out; and if the optimal charging position is located outside the movable area of the charging module, sending alarm information and finishing the charging process.
And S3, the control module drives the charging module to move to the optimal charging position through the driving module.
And S4, after the charging module moves to the right position, starting to perform charging operation.
As shown in fig. 12 and 13, in the two embodiments, the detection area is periodically scanned by the position detection module, and the control module calculates and obtains the coordinates of the optimal charging position. 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, unit charging areas with optimal charging in the two directions are obtained respectively and then are superposed, and the specific coordinate position of the optimal charging area is obtained.
In the specific implementation shown in fig. 12:
s201, in the position detection module, a driving device drives a first direction wire frame and a second direction wire frame to move to the starting end respectively. In this embodiment, the detection driving part drives the first direction wire frame to move to the leftmost end, and the second direction wire frame moves to the uppermost end.
S202, the first direction wire frame and the second direction wire frame are powered on, the first direction wire frame and the second direction wire frame move to the terminal end at the same time, and the charging efficiency (magnetic induction efficiency, such as detection of charging frequency and parasitic loss) of each unit charging region is obtained during the movement. The first direction wire frame and the second direction wire frame can be powered on and powered off in a crossed mode; the detection driving part can drive the first direction wire frame and the second direction wire frame to be electrified in the process of forward movement (the first direction wire frame moves rightwards, the second direction wire frame moves downwards) at the same time, and the detection driving part can drive the first direction wire frame and the second direction wire frame to be electrified in the process of reverse movement (the first direction wire frame moves leftwards, the second direction wire frame moves upwards) at the same time.
S203, after the position detection module circularly detects a complete stroke, the control module obtains the coordinate of the optimal unit charging area in the first direction and the coordinate of the optimal charging area in the second direction, and the coordinate of the optimal charging position in the whole detection area is obtained by overlapping the first coordinate and the second coordinate.
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 process of detecting the first direction wire frame and the second direction wire frame, it is necessary to perform detection in stages and shift the charging module in different stages so that it does not generate much interference on the detection result.
The specific implementation process comprises the following steps:
s201, setting the whole detection area to comprise four detection areas, namely, an upper right detection area, an upper left detection area, a lower left detection area and a lower right detection area, wherein the four detection areas respectively correspond to a first quadrant, a second quadrant, a third quadrant and a fourth quadrant, and the four quadrants are total. At the beginning, the driving module drives the charging module to move to a lower right position (i.e. the fourth quadrant), preferably to a lower right corner.
In the position detection module, a 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 part drives the first direction wire frame to move to the leftmost end, and the second direction wire frame moves to the uppermost end.
S202, the first direction wire frame and the second direction wire frame are powered on, the first direction wire frame and the second direction wire frame move to the end point (the embodiment refers to the midpoint position of the detection region) at the same time, and the charging efficiency (magnetic induction efficiency, such as the detection charging frequency and parasitic loss) of each unit charging region is obtained 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 a position signal is sent to the control module when the first direction wire frame and the second direction wire frame are received and move to the half stroke, and if the first direction wire frame and the second direction wire frame do not reach the half stroke, continuing moving and detecting.
S204, if the first direction wire frame and the second direction wire frame reach a half stroke, the first direction wire frame and the second direction wire frame are respectively powered off, and the detection driving part stops driving the first direction wire frame and the second direction wire frame to move.
S205, the driving module drives the charging module to move to an upper left position (i.e. a second quadrant), preferably to an upper left corner.
And S206, judging whether the charging module moves to the second quadrant or not, or identifying whether a feedback signal generated after the charging module moves to the second quadrant in place is received or not, and if the charging module does not move in place, continuing to move.
S207, if the charging module is moved to the right position, the first direction wire frame and the second direction wire frame continue the moving and detecting process, in step S202.
And S208, judging whether the detection of the whole stroke is finished or not, and if not, continuing to the step S207.
And S208, after the position detection module circularly detects a complete stroke, the control module obtains the coordinate of the optimal unit charging area in the first direction and the coordinate of the optimal charging area in the second direction, and the coordinate of the optimal charging position in the whole detection area is obtained by superposing the first coordinate and the second coordinate.
In the complete process, the first direction wire frame and the second direction wire frame can be powered on and powered off in a crossed mode; the detection driving part can drive the first direction wire frame and the second direction wire frame to be electrified in the process of forward movement (the first direction wire frame moves rightwards, the second direction wire frame moves downwards) at the same time, and the detection driving part can drive the first direction wire frame and the second direction wire frame to be electrified in the process of reverse movement (the first direction wire frame moves leftwards, the second direction wire frame moves upwards) at the same time. Alternatively, one of the first and second direction wire frames may be energized during a first half stroke by the detection driving unit, and the other of the first and second direction wire frames may be energized during a second half stroke by the detection driving unit, while the other of the first and second direction wire frames may be energized during a first half stroke by the detection driving unit, and the other of the first and second direction wire frames may be energized during a second half stroke by the detection driving unit.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
The invention is described above with reference to the accompanying drawings, which are illustrative, and it is obvious that the implementation of the invention is not limited in the above manner, and it is within the scope of the invention to adopt various modifications of the inventive method concept and technical solution, or to apply the inventive concept and technical solution to other fields without modification.
Claims (10)
1. A wireless charger capable of automatically positioning during charging comprises a shell, and is characterized in that a control module, a position detection module, a driving module and a charging module which are communicated with the control module are arranged in the shell,
the position detection module is used for detecting charging efficiency values of different positions;
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 the 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 device to be charged.
2. The wireless charger according to claim 1, wherein the control module comprises an MCU, a first detection unit connected to 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 carry out optimal charging position detection and receiving a detection result of the position detection module;
the space calculation unit calculates 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 coordinate 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 wireless charger according to claim 1, wherein 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 obtained by moving the first direction wire frame, and the charging efficiency of each unit charging area in the second direction is obtained by moving the second direction wire frame.
4. The charging automatic positioning wireless charger according to claim 1, wherein the charging module comprises a magnetism isolating plate and a charging coil positioned at one side of the magnetism isolating plate, and the height of the outer layer winding of the charging coil is higher than that of the adjacent inner layer winding, so that the charging coil forms an inverted circular truncated cone shape around the charging coil.
5. The wireless charger according to claim 1, wherein a to-be-charged detection module connected to the control module is further disposed in the housing, and the to-be-charged detection module is configured to sense whether a device to be charged is present on the housing and send a sensing result to the control module.
6. The charging automatic positioning wireless charger according to claim 1, wherein a temperature detection module connected to the control module is further disposed in the housing, and the temperature detection module is configured to detect a temperature of the device to be charged and/or the charging module and feed back a temperature value to the control module.
7. The wireless charger according to claim 1, wherein an indication module connected to the control module is further disposed in the housing, and the indication module is configured to receive an instruction from the control module and display an operation status of the wireless charger.
8. An implementation method of the wireless charger with automatic charging positioning function according to any one of claims 1 to 7, comprising the following steps:
s1, detecting and judging whether charging equipment exists in the detection area;
s2, if the charging equipment exists, periodically scanning the detection area, and determining the coordinate of the optimal charging position;
s3, the control module drives the charging module to move to the optimal charging position through the driving module;
and S4, after the charging module moves to the right position, starting to perform charging operation.
9. The method of claim 8, wherein in step S2, after determining the optimal charging position, determining whether the optimal charging position is located in the movable area of the charging module, if so, proceeding to the next step, and if the optimal charging position is located outside the movable area of the charging module, sending an alarm message and ending the charging process.
10. The method for implementing the wireless charger according to claim 8 or 9, wherein in step S2, the detection area is periodically scanned by the position detection module, and the control module calculates the coordinates of the optimal charging position, which includes:
in the position detection module, a first direction wire frame and a second direction wire frame are respectively moved 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 coordinate of the optimal unit charging area in the first direction and the coordinate of the optimal charging area in the second direction, and the coordinate of the optimal charging position in the whole detection area is obtained by superposing the first coordinate and the second coordinate.
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