CN108808870B - Wireless charging control system based on NFC technology and control method thereof - Google Patents
Wireless charging control system based on NFC technology and control method thereof Download PDFInfo
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- CN108808870B CN108808870B CN201810657134.9A CN201810657134A CN108808870B CN 108808870 B CN108808870 B CN 108808870B CN 201810657134 A CN201810657134 A CN 201810657134A CN 108808870 B CN108808870 B CN 108808870B
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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
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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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
- H02J50/20—Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
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- H02J7/0077—
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- H02J7/025—
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
Abstract
The invention discloses a wireless charging control system based on an NFC technology, which comprises a current input module, a charging control module and a charging control module, wherein the current input module is used for inputting electric energy; the control signal loading module is used for loading a control signal into the input current; the electromagnetic energy sending module is used for sending wireless electromagnetic energy; the electromagnetic energy receiving module is used for receiving wireless electromagnetic energy; the control signal separation module is used for separating out a control signal in the received radio electromagnetic wave; the charging current separation module is used for separating charging current from the received radio electromagnetic wave; the control signal correction module is used for correcting the separated control signals; and the charging current adjusting module is used for adjusting the charging current. The invention can improve the defects of the prior art, reduce the interference of the power frequency power supply to the control signal and optimize the performance of the single-coil NFC device.
Description
Technical Field
The invention relates to the technical field of wireless charging, in particular to a wireless charging control system based on an NFC technology and a control method thereof.
Background
The wireless charging utilizes the electromagnetic induction principle to transmit electric energy through the change of an electromagnetic field. NFC is short for short range wireless communication to realize contactless data transmission of electronic devices. However, the conventional NFC device needs to perform data communication while performing wireless charging. Because the frequency of power frequency power is 50Hz, if load control signal to power frequency power signal, because power frequency is low, can cause serious interference to control signal, in order to avoid this problem, prior art uses two sets of independent electromagnetic induction coils respectively to be used for wireless charging and data transmission, and this just leads to whole NFC charging device's structure complicacy.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a wireless charging control system based on an NFC technology and a control method thereof, which can solve the defects of the prior art, reduce the interference of a power frequency power supply to a control signal, and optimize the performance of a single-coil NFC device.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows.
A wireless charging control system based on NFC technology comprises,
the current input module is used for inputting electric energy;
the control signal loading module is used for loading a control signal into the input current;
the electromagnetic energy sending module is used for sending wireless electromagnetic energy;
the electromagnetic energy receiving module is used for receiving wireless electromagnetic energy;
the control signal separation module is used for separating out a control signal in the received radio electromagnetic wave;
the charging current separation module is used for separating charging current from the received radio electromagnetic wave;
the control signal correction module is used for correcting the separated control signals;
and the charging current adjusting module is used for adjusting the charging current.
Preferably, the input terminal of the control signal separation module is connected to the positive input terminal of the first operational amplifier through a first capacitor, the negative input terminal of the first operational amplifier is grounded through a first resistor, the negative input terminal of the first operational amplifier is connected to the output terminal of the second operational amplifier through a first resistor, the positive input terminal of the first operational amplifier is connected to the collector of the first triode through a third resistor, the input terminal of the control signal separation module is connected to the base of the first triode through a second capacitor, a fourth resistor and a fifth resistor which are connected in series, the input terminal of the control signal separation module is connected to the positive input terminal of the second operational amplifier through a sixth resistor, the positive input terminal of the second operational amplifier is grounded through a seventh resistor, the space between the second capacitor and the fourth resistor is connected to the negative input terminal of the second operational amplifier through an eighth resistor, and the output terminal of the second operational amplifier is connected between the fourth resistor and the fifth resistor, the emitting electrode of the first triode is grounded through the third capacitor, the emitting electrode of the first triode is connected to the output end of the first operational amplifier, and the output end of the first operational amplifier is used as the output end of the control signal separation module.
Preferably, the input terminal of the charging current splitting module is connected to the positive input terminal of the third operational amplifier through a ninth resistor and a fourth capacitor connected in series, the positive input terminal of the third operational amplifier is connected to the ground through a fifth capacitor, the negative input terminal of the third operational amplifier is connected to the ground through a tenth resistor, the negative input terminal of the third operational amplifier is connected to the ground through an eleventh resistor, the negative input terminal of the third operational amplifier is connected to the output terminal of the third operational amplifier through a twelfth resistor, the ninth resistor and the fourth capacitor are connected to the output terminal of the third operational amplifier through a thirteenth resistor and a sixth capacitor connected in parallel, the ninth resistor and the fourth capacitor are connected to the ground through a seventh capacitor, the output terminal of the third operational amplifier is connected to the ground through an eighth capacitor, the output terminal of the third operational amplifier is connected to the base of the second triode through a ninth capacitor, and the output terminal of the third operational amplifier is connected to the collector of the second triode through a fourteenth, the emitting electrode of the second triode is grounded through a fifteenth resistor and a tenth capacitor which are connected in parallel, the collecting electrode of the second triode is connected to the positive phase input end of the fourth operational amplifier through a sixteenth resistor, the emitting electrode of the second triode is connected to the negative phase input end of the fourth operational amplifier through an eleventh capacitor, the negative phase input end of the fourth operational amplifier is grounded through a seventeenth resistor, the negative phase input end of the fourth operational amplifier is connected to the output end of the fourth operational amplifier through an eighteenth resistor, and the output end of the fourth operational amplifier is used as the output end of the charging current separation module.
A control method of the wireless charging control system based on the NFC technology comprises the following steps:
A. the current input module is connected with an external power supply;
B. the control signal loading module loads a control signal into the current input module;
C. the current loaded with the control signal is sent out in a wireless electromagnetic wave mode through the electromagnetic energy sending module;
D. the electromagnetic energy receiving module receives the wireless electromagnetic waves and converts the wireless electromagnetic waves into current;
E. the control signal separation module and the charging current separation module separate a control signal and a charging current from the current respectively;
F. the control signal correction module corrects the control signal according to the charging current separated by the charging current separation module;
G. the charging current adjusting module rectifies the charging current and then adjusts the charging current according to the instruction of the control signal.
Preferably, the step F of modifying the control signal comprises the steps of,
f1, comparing the charging current separated by the charging current separation module with the power frequency current signal, and marking the deviation area of the charging current and the power frequency current;
f2, smoothing each deviation area;
f3, performing normal distribution fitting on the smoothed deviation area;
f4, taking the [ mu-1.15 sigma, mu +1.15 sigma ] part of the fitted normal distribution curve as an effective signal, taking the effective signal as an independent variable and the control signal as a dependent variable, performing linear regression, and then combining the effective signal and the control signal.
Preferably, the adjusting of the charging current in step G includes the steps of,
g1, when the electric quantity of the rechargeable battery is less than 75%, charging by using rated charging current;
g2, when the electric quantity of the rechargeable battery is greater than or equal to 75% and less than 95%, charging by using 80% of rated charging current;
g3, when the electric quantity of the rechargeable battery is greater than or equal to 95% and less than 100%, charging by using sine wave current, wherein the average current intensity of the sine wave current is 20% of the rated charging current;
g4, after the electric quantity of the rechargeable battery reaches 100%, an intermittent charging mode is adopted, charging is carried out for 3min by using 10% of rated current each time, then pausing for 5min, and finishing charging after repeating for 5 times.
Adopt the beneficial effect that above-mentioned technical scheme brought to lie in: the invention improves the control signal separation mode of the NFC charging device, and effectively filters the interference of the power frequency signal. The charging current separation module can separate the charging current, and more importantly, the interference area of the power frequency signal and the control signal can be reserved, so that the purpose of correcting the control signal by using the charging current signal is achieved. By modifying the control signal, the signal-to-noise ratio of the control signal can be further improved, thereby improving the signal transmission performance of the 'single coil' NFC device. Further, by adjusting the current at the last stage of charging, the battery can be activated in a periodic, intermittent charging mode, thereby extending the life of the battery.
Drawings
FIG. 1 is a schematic diagram of one embodiment of the present invention.
Fig. 2 is a circuit diagram of a control signal splitting module according to an embodiment of the present invention.
Fig. 3 is a circuit diagram of a charging current splitting module according to an embodiment of the present invention.
Detailed Description
Referring to fig. 1-3, one embodiment of the present invention includes,
the current input module 1 is used for inputting electric energy;
the control signal loading module 2 is used for loading a control signal into the input current;
the electromagnetic energy sending module 3 is used for sending wireless electromagnetic energy;
an electromagnetic energy receiving module 4 for receiving wireless electromagnetic energy;
a control signal separation module 5 for separating the control signal from the received radio-magnetic wave;
a charging current separation module 6 for separating the charging current in the received radio electromagnetic wave;
a control signal correction module 7, configured to correct the separated control signal;
and the charging current adjusting module 8 is used for adjusting the charging current.
An input end of the control signal separation module 5 is connected to a positive input end of a first operational amplifier a1 through a first capacitor C1, a negative input end of the first operational amplifier a1 is connected to the ground through a first resistor R1, a negative input end of the first operational amplifier a1 is connected to an output end of a first operational amplifier a1 through a second resistor R2, a positive input end of a first operational amplifier a1 is connected to a collector of a first triode Q1 through a third resistor R3, an input end of the control signal separation module 5 is connected to a base of a first triode Q1 through a second capacitor C2, a fourth resistor R4 and a fifth resistor R5 which are connected in series, an input end of the control signal separation module 5 is connected to a positive input end of a second operational amplifier a2 through a sixth resistor R6, a positive input end of the second operational amplifier a2 is connected to the ground through a seventh resistor R7, a space between the second capacitor C2 and the fourth resistor R4 is connected to a negative input end of a second operational amplifier a2 through an eighth resistor R8, the output end of the second operational amplifier a2 is connected between the fourth resistor R4 and the fifth resistor R5, the emitter of the first triode Q1 is grounded through the third capacitor C3, the emitter of the first triode Q1 is connected to the output end of the first operational amplifier a1, and the output end of the first operational amplifier a1 is used as the output end of the control signal separation module 5.
An input end of the charging current separation module 6 is connected to a positive-phase input end of the third operational amplifier A3 through a ninth resistor R9 and a fourth capacitor C4 which are connected in series, the ground is connected between the ninth resistor R9 and the fourth capacitor C4 through a fifth capacitor C5, the positive-phase input end of the third operational amplifier A3 is connected to the ground through a tenth resistor R10, an inverting input end of the third operational amplifier A3 is connected to the ground through an eleventh resistor R11, an inverting input end of the third operational amplifier A3 is connected to an output end of the third operational amplifier A3 through a twelfth resistor R12, the ground is connected between the ninth resistor R3 and the fourth capacitor C3 through a thirteenth resistor R3 and a sixth capacitor C3 which are connected in parallel, the ground is connected between the ninth resistor R3 and the fourth capacitor C3 through a seventh capacitor C3, an output end of the third operational amplifier A3 is connected to the ground through an eighth capacitor C3, an output end of the fourteenth transistor 3 is connected to a collector 3 of the second operational amplifier a triode 3 through a base 3, an emitter of the second triode Q2 is grounded through a fifteenth resistor R15 and a tenth capacitor C10 which are connected in parallel, a collector of the second triode Q2 is connected to a positive input terminal of the fourth operational amplifier a4 through a sixteenth resistor R16, an emitter of the second triode Q2 is connected to a negative input terminal of the fourth operational amplifier a4 through an eleventh capacitor C11, a negative input terminal of the fourth operational amplifier a4 is grounded through a seventeenth resistor R17, a negative input terminal of the fourth operational amplifier a4 is connected to an output terminal of the fourth operational amplifier a4 through an eighteenth resistor R18, and an output terminal of the fourth operational amplifier a4 serves as an output terminal of the charging current separation module 6.
The first resistor R1 is 3k Ω, the second resistor R2 is 5.5k Ω, the third resistor R3 is 5k Ω, the fourth resistor R4 is 1k Ω, the fifth resistor R5 is 2k Ω, the sixth resistor R6 is 0.5k Ω, the seventh resistor R7 is 7k Ω, the eighth resistor R8 is 10k Ω, the ninth resistor R9 is 1.5 k Ω, the tenth resistor R10 is 12k Ω, the eleventh resistor R11 is 10k Ω, the twelfth resistor R12 is 2k Ω, the thirteenth resistor R Ω 13 is 3k Ω, the fourteenth resistor R14 is 3.5k Ω, the fifteenth resistor R15 is 0.5k Ω, the sixteenth resistor R16 is 4k Ω, the seventeenth resistor R17 is 5k Ω, and the eighteenth resistor R18 is 7 k. The first capacitor C1 is 75 μ F, the second capacitor C2 is 150 μ F, the third capacitor C3 is 100 μ F, the fourth capacitor C4 is 200 μ F, the fifth capacitor C5 is 250 μ F, the sixth capacitor C6 is 80 μ F, the seventh capacitor C7 is 120 μ F, the eighth capacitor C8 is 180 μ F, the ninth capacitor C9 is 50 μ F, the tenth capacitor C10 is 25 μ F, and the eleventh capacitor C11 is 80 μ F.
A control method of the wireless charging control system based on the NFC technology comprises the following steps:
A. the current input module 1 is connected with an external power supply;
B. the control signal loading module 2 loads a control signal into the current input module 1;
C. the current loaded with the control signal is transmitted in the form of wireless electromagnetic waves through the electromagnetic energy transmitting module 3;
D. the electromagnetic energy receiving module 4 receives the wireless electromagnetic wave and converts the wireless electromagnetic wave into current;
E. the control signal separation module 5 and the charging current separation module 6 separate a control signal and a charging current from the current respectively;
F. the control signal correction module 7 corrects the control signal according to the charging current separated by the charging current separation module 6;
G. the charging current adjusting module 8 rectifies the charging current and then adjusts the charging current according to the instruction of the control signal.
In step F, the step of modifying the control signal comprises the steps of,
f1, comparing the charging current separated by the charging current separation module 6 with the power frequency current signal, and marking the deviation area of the charging current and the power frequency current;
f2, smoothing each deviation area;
f3, performing normal distribution fitting on the smoothed deviation area;
f4, taking the [ mu-1.15 sigma, mu +1.15 sigma ] part of the fitted normal distribution curve as an effective signal, taking the effective signal as an independent variable and the control signal as a dependent variable, performing linear regression, and then combining the effective signal and the control signal.
In step F2, before smoothing the deviation region, the spike pulse included in the deviation region is first deleted, the feature vector of the spike pulse is extracted, the feature vector of the spike pulse is used to compare with the feature vector of the control signal, and the spike pulse corresponding to the feature vector linearly related to the feature vector of the control signal is incorporated into the control signal. Through the processing of the spike pulse, the interference of the spike pulse can be effectively reduced, and meanwhile, the information data loss caused by the deletion of the spike pulse is reduced.
In step G, the adjusting of the charging current comprises the steps of,
g1, when the electric quantity of the rechargeable battery is less than 75%, charging by using rated charging current;
g2, when the electric quantity of the rechargeable battery is greater than or equal to 75% and less than 95%, charging by using 80% of rated charging current;
g3, when the electric quantity of the rechargeable battery is greater than or equal to 95% and less than 100%, charging by using sine wave current, wherein the average current intensity of the sine wave current is 20% of the rated charging current;
g4, after the electric quantity of the rechargeable battery reaches 100%, an intermittent charging mode is adopted, charging is carried out for 3min by using 10% of rated current each time, then pausing for 5min, and finishing charging after repeating for 5 times.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. The utility model provides a wireless charging control system based on NFC technique which characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
the current input module (1) is used for inputting electric energy;
the control signal loading module (2) is used for loading a control signal into the input current;
the electromagnetic energy sending module (3) is used for sending out wireless electromagnetic waves;
the electromagnetic energy receiving module (4) is used for receiving wireless electromagnetic waves;
a control signal separation module (5) for separating out a control signal within the received radio-electromagnetic wave;
a charging current separation module (6) for separating the charging current within the received radio-electromagnetic wave;
a control signal correction module (7) for correcting the separated control signal;
the charging current adjusting module (8) is used for adjusting the charging current;
the input end of the control signal separation module (5) is connected to the positive phase input end of a first operational amplifier (A1) through a first capacitor (C1), the inverting input end of the first operational amplifier (A1) is grounded through a first resistor (R1), the inverting input end of the first operational amplifier (A1) is connected to the output end of a first operational amplifier (A1) through a second resistor (R2), the positive phase input end of the first operational amplifier (A1) is connected to the collector of a first triode (Q1) through a third resistor (R3), the input end of the control signal separation module (5) is connected to the base of a first triode (Q1) through a second capacitor (C2), a fourth resistor (R4) and a fifth resistor (R5) which are connected in series, the input end of the control signal separation module (5) is connected to the input end of a second operational amplifier (A2) through a sixth resistor (R6), and the positive phase input end of the second operational amplifier (A2) is grounded through a seventh resistor (R7), the second capacitor (C2) and the fourth resistor (R4) are connected to the inverting input end of the second operational amplifier (A2) through an eighth resistor (R8), the output end of the second operational amplifier (A2) is connected between the fourth resistor (R4) and the fifth resistor (R5), the emitter of the first triode (Q1) is grounded through the third capacitor (C3), the emitter of the first triode (Q1) is connected to the output end of the first operational amplifier (A1), and the output end of the first operational amplifier (A1) serves as the output end of the control signal separation module (5).
2. The NFC technology-based wireless charging control system according to claim 1, wherein: the input end of the charging current separation module (6) is connected to the positive input end of a third operational amplifier (A3) through a ninth resistor (R9) and a fourth capacitor (C4) which are connected in series, the positive input end of the third operational amplifier (A3) is connected to the ground through a tenth resistor (R10), the inverting input end of the third operational amplifier (A3) is connected to the ground through an eleventh resistor (R11), the inverting input end of the third operational amplifier (A3) is connected to the output end of the third operational amplifier (A3) through a twelfth resistor (R12), the inverting input end of the ninth resistor (R9) and the fourth capacitor (C4) are connected to the output end of the third operational amplifier (A3) through a thirteenth resistor (R13) and a sixth capacitor (C465) which are connected in parallel, the input end of the ninth resistor (R9) and the fourth capacitor (C6324) is connected to the output end of the third operational amplifier (A3) through a seventh capacitor (A599) and an eighth capacitor (C595739), an output end of the third operational amplifier (A3) is connected to a base of the second triode (Q2) through a ninth capacitor (C9), an output end of the third operational amplifier (A3) is connected to a collector of the second triode (Q2) through a fourteenth resistor (R14), an emitter of the second triode (Q2) is grounded through a fifteenth resistor (R15) and a tenth capacitor (C10) which are connected in parallel, a collector of the second triode (Q2) is connected to a non-inverting input end of the fourth operational amplifier (A4) through a sixteenth resistor (R16), an emitter of the second triode (Q2) is connected to an inverting input end of the fourth operational amplifier (A4) through an eleventh capacitor (C11), an inverting input end of the fourth operational amplifier (A4) is grounded through a seventeenth resistor (R17), an inverting input end of the fourth operational amplifier (A4) is connected to an inverting input end of the fourth operational amplifier (A4) through an eighteenth resistor (R18), and a charging current is separated from an output end of the fourth operational amplifier (a 466).
3. A control method of a wireless charging control system based on NFC technology according to any of claims 1-2, characterized by comprising the steps of:
A. the current input module (1) is connected with an external power supply;
B. the control signal loading module (2) loads a control signal into the current input module (1);
C. the current loaded with the control signal is sent out in the form of wireless electromagnetic waves through the electromagnetic energy sending module (3);
D. the electromagnetic energy receiving module (4) receives the wireless electromagnetic waves and converts the wireless electromagnetic waves into current;
E. the control signal separation module (5) and the charging current separation module (6) separate a control signal and a charging current from the current respectively;
F. the control signal correction module (7) corrects the control signal according to the charging current separated by the charging current separation module (6);
G. the charging current adjusting module (8) rectifies the charging current and then adjusts the charging current according to the instruction of the control signal.
4. The control method of the NFC-technology-based wireless charging control system according to claim 3, wherein: in step F, the step of modifying the control signal comprises the steps of,
f1, comparing the charging current separated by the charging current separation module (6) with the power frequency current signal, and marking the deviation area of the charging current and the power frequency current;
f2, smoothing each deviation area;
f3, performing normal distribution fitting on the smoothed deviation area;
f4, taking the [ mu-1.15 sigma, mu +1.15 sigma ] part of the fitted normal distribution curve as an effective signal, taking the effective signal as an independent variable and the control signal as a dependent variable, performing linear regression, and then combining the effective signal and the control signal.
5. The control method of the NFC-technology-based wireless charging control system according to claim 3, wherein: in step G, the adjusting of the charging current comprises the steps of,
g1, when the electric quantity of the rechargeable battery is less than 75%, charging by using rated charging current;
g2, when the electric quantity of the rechargeable battery is greater than or equal to 75% and less than 95%, charging by using 80% of rated charging current;
g3, when the electric quantity of the rechargeable battery is greater than or equal to 95% and less than 100%, charging by using sine wave current, wherein the average current intensity of the sine wave current is 20% of the rated charging current;
g4, after the electric quantity of the rechargeable battery reaches 100%, an intermittent charging mode is adopted, charging is carried out for 3min by using 10% of rated current each time, then pausing for 5min, and finishing charging after repeating for 5 times.
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| CN106299600A (en) * | 2016-08-12 | 2017-01-04 | 珠海格力电器股份有限公司 | Multi-Function Antenna control method, device and there is the smart mobile phone of this device |
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Denomination of invention: A wireless charging control system based on NFC technology and its control method Effective date of registration: 20220705 Granted publication date: 20200728 Pledgee: Agricultural Bank of China Limited Ganzhou Development Zone sub branch Pledgor: YANCHUANG PHOTOELECTRIC TECHNOLOGY (GANZHOU) Co.,Ltd. Registration number: Y2022980009837 |
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Address after: 341000 Industrial Park, Ganzhou economic and Technological Development Zone, Ganzhou City, Jiangxi Province Patentee after: Ganzhou Yanchuang Electronic Technology Co.,Ltd. Address before: 341000 Industrial Park, Ganzhou economic and Technological Development Zone, Ganzhou City, Jiangxi Province Patentee before: YANCHUANG PHOTOELECTRIC TECHNOLOGY (GANZHOU) Co.,Ltd. |