CN114583853B

CN114583853B - Wireless charging transmitting terminal, data demodulation method, device, equipment and storage medium

Info

Publication number: CN114583853B
Application number: CN202210483203.5A
Authority: CN
Inventors: 虞少平; 周超; 朱洪生
Original assignee: Zhejiang Geoforcechip Technology Co Ltd
Current assignee: Zhejiang Geoforcechip Technology Co Ltd
Priority date: 2022-05-06
Filing date: 2022-05-06
Publication date: 2022-08-26
Anticipated expiration: 2042-05-06
Also published as: CN114583853A

Abstract

The application provides a wireless charging transmitting terminal, a data demodulation method, a data demodulation device, equipment and a storage medium, and relates to the technical field of wireless charging. The power transmitting terminal includes: the device comprises a control module, a power supply module, a driving control circuit, a transmitting coil, a current demodulation circuit and a voltage demodulation circuit; the pulse output end of the control module is connected with the control end of the drive control circuit, the power supply end of the drive control circuit is also connected with the power supply wiring end of the power supply module, and the two output ends of the drive control circuit are also connected with the two wiring ends of the transmitting coil; the input end of the current demodulation circuit is connected with the power supply wiring terminal, the output end of the current demodulation circuit is connected with the first input and output end of the control module, the input end of the voltage demodulation circuit is connected with any wiring section of the transmitting coil, and the output end of the voltage demodulation circuit is connected with the second input and output end of the control module. The demodulation success rate is improved, the stability, reliability and safety of wireless charging communication are ensured, and the charging requirement is accurately realized.

Description

Wireless charging transmitting terminal, data demodulation method, device, equipment and storage medium

Technical Field

The invention relates to the technical field of wireless charging, in particular to a wireless charging transmitting terminal, a data demodulation method, a data demodulation device, equipment and a storage medium.

Background

Along with the continuous development of the charging technology, wireless charging is more and more popular for charging more conveniently and quickly. With the popularization of QI (Quick Charge for Wireless Power) protocol specifications in the field of Wireless charging, more and more Wireless charging devices support the QI protocol.

In the Qi protocol, RX (receiver) to TX (transmitter) use ASK (amplitude shift keying) to transmit signals, i.e. to transfer information by changing the amplitude of the carrier voltage. And RX sends information, it needs TX to demodulate the amplitude of the carrier voltage to obtain information. In the prior art, a voltage demodulation method is usually used to demodulate the amplitude of the carrier voltage, wherein the demodulation method includes hardware circuits such as peak detection, filtering, amplification and the like, and after preprocessing, regular square wave signals are output and then collected by a microprocessor, and the signals can be converted into digital logic signals.

However, the voltage amplitude of the ASK signal is often easily interfered by the outside, so that the phenomena of packet leakage, packet loss and packet error often exist; the ASK signal is demodulated by adopting a voltage demodulation method, so that communication is abnormal easily in the charging process, and the charging stability and safety are affected.

Disclosure of Invention

The present invention provides a wireless charging transmitting terminal, a data demodulation method, an apparatus, a device and a storage medium, to solve the problem in the prior art that communication is easy to be abnormal during charging.

In order to achieve the above purpose, the technical solutions adopted in the embodiments of the present application are as follows:

in a first aspect, an embodiment of the present application provides a power transmitting terminal in a wireless charging system, where the power transmitting terminal includes: the device comprises a control module, a power supply module, a driving control circuit, a transmitting coil, a current demodulation circuit and a voltage demodulation circuit;

the pulse output end of the control module is connected with the control end of the driving control circuit, the power supply end of the driving control circuit is also connected with the power supply wiring end of the power supply module, and the two output ends of the driving control circuit are also connected with the two wiring ends of the transmitting coil;

the input end of the current demodulation circuit is connected with the power supply wiring terminal, the output end of the current demodulation circuit is connected with the first input and output end of the control module, the input end of the voltage demodulation circuit is connected with any wiring section of the transmitting coil, and the output end of the voltage demodulation circuit is connected with the second input and output end of the control module.

In a second aspect, an embodiment of the present application provides a wireless charging data demodulation method, which is applied to a control module in a power source transmitting end in the first aspect, where the method includes:

acquiring a current demodulation signal output by the current demodulation circuit and a voltage demodulation signal output by the voltage demodulation circuit;

processing the current demodulation signal to obtain current demodulation data;

processing the voltage demodulation signal to obtain voltage demodulation data;

verifying the current demodulation data and the voltage demodulation data respectively;

and determining target demodulation data according to the verification result, the voltage demodulation data and the current demodulation data, wherein the target demodulation data are transmission data from a power supply receiving end in the wireless charging system.

In one possible implementation, the verifying the current demodulation data and the voltage demodulation data respectively includes:

calculating a first header information length of each of the demodulated data according to a header in each of the current demodulated data and the voltage demodulated data;

performing first check according to the first header information length of each demodulated data and the corresponding first actual information length;

calculating a first calculated checksum for each of the demodulated data based on the header and information in each of the demodulated data;

performing a second check based on the first calculated checksum of each of the demodulated data and the first actual checksum of each of the demodulated data;

if the first check and the second check both pass, determining that the demodulation data check passes;

and if the first check and/or the second check are not passed, determining that the demodulation data check is not passed.

In one possible implementation manner, the determining, according to the verification result, the voltage demodulation data, and the current demodulation data, that the target demodulation data is transmission data from a power source receiving end in the wireless charging system includes:

and if the verification result is that both the current demodulation data and the voltage demodulation data pass verification, determining any demodulation data in the current demodulation data and the voltage demodulation data as the target demodulation data.

and if the verification result is that one of the current demodulation data and the voltage demodulation data passes verification, determining the demodulation data passing verification as the target demodulation data.

if the verification result indicates that the current demodulation data and the voltage demodulation data are not verified, pairing and combining the current demodulation data and the voltage demodulation data byte by byte to obtain a plurality of recombined demodulation data, wherein the formats of each recombined demodulation data, the current demodulation data and the voltage demodulation data are all preset data packet formats;

checking the plurality of recombined demodulated data;

and determining the demodulation data passing the check in the plurality of recombined demodulation data as the target demodulation data.

In one possible implementation, the checking the plurality of reassembled demodulated data includes:

calculating a second header information length of each of the re-grouped demodulated data according to the header in each of the re-grouped demodulated data;

performing first verification according to the second header information length of each recombined and demodulated data and the corresponding second actual information length;

calculating a second calculated checksum for each of the reassembled demodulated data based on the header and information in each of the reassembled demodulated data;

performing a second check according to the second calculated checksum of each reconstructed demodulated data and the second actual checksum in each reconstructed demodulated data;

if the first check and the second check both pass, determining that the recombined demodulation data passes the check;

and if the first check and/or the second check are not passed, determining that the recombined demodulation data check is not passed.

In a third aspect, an embodiment of the present application provides a wireless charging data demodulation apparatus, where the apparatus includes:

the acquisition module is used for acquiring a current demodulation signal output by the current demodulation circuit and a voltage demodulation signal output by the voltage demodulation circuit;

the first processing module is used for processing the current demodulation signal to obtain current demodulation data;

the second processing module is used for processing the voltage demodulation signal to obtain voltage demodulation data;

the checking module is used for checking the current demodulation data and the voltage demodulation data respectively;

and the determining module is used for determining target demodulation data according to the checking result, the voltage demodulation data and the current demodulation data, wherein the target demodulation data are transmission data from a power receiving end in the wireless charging system.

In a fourth aspect, an embodiment of the present application provides a control apparatus, including: the wireless charging data demodulation method comprises a processor and a storage medium, wherein the processor and the storage medium are connected through bus communication, the storage medium stores program instructions executable by the processor, and the processor calls the program instructions stored in the storage medium to execute the steps of the wireless charging data demodulation method according to any one of the second aspects.

In a fifth aspect, the present application provides a storage medium, where a computer program is stored, and the computer program is executed by a processor to perform the steps of the wireless charging data demodulation method according to the second aspect.

In a sixth aspect, an embodiment of the present application provides a current demodulation circuit, including: the device comprises a sampling resistor, an amplifying module and a current demodulating module;

the sampling resistor is arranged on a power supply loop to collect power supply current on the power supply loop; two input ends of the amplifying module are respectively connected with two ends of the sampling resistor so as to amplify the power supply current; the output end of the amplifying module is connected with the input end of the current demodulating module; one end of the sampling resistor is the input end of the current demodulation circuit, and the output end of the current demodulation module is the output end of the current demodulation circuit.

In one possible implementation, the current demodulation circuit further includes: the output end of the amplifying module is connected with the input end of the direct current isolating and passing module, and the output end of the direct current isolating and passing module is connected with the input end of the current demodulating module.

In one possible implementation, the isolation-through cross-over module is a capacitor.

In one possible implementation, the amplifying module is: the sampling circuit comprises a first comparator, a first resistor, a second resistor, a third resistor and a filter capacitor, wherein the non-inverting input end of the first comparator is connected with one end of the sampling resistor through the first resistor, the inverting input end of the first comparator is connected with the other end of the sampling resistor through the second resistor, the non-inverting input end of the first comparator is also connected with the inverting input end through the filter capacitor, and the inverting input end of the first comparator is also connected with the output end of the first comparator through the third resistor;

the output end of the first comparator is the output end of the amplifying module.

In one possible implementation, the current demodulation module includes: the first comparator, the first filtering unit and the second filtering unit;

the output end of the amplifying module is connected with the non-inverting input end of the second comparator through the first filtering unit, the output end of the amplifying module is connected with the inverting input end of the second comparator through the second filtering unit, and the output end of the second comparator is the output end of the current demodulating module.

In a seventh aspect, an embodiment of the present application provides a power transmitting end in a wireless charging system, where the power transmitting end includes: the device comprises a control module, a power supply module, a driving control circuit, a transmitting coil and a current demodulation circuit;

the input end of the current demodulation circuit is connected to the power supply wiring terminal, and the output end of the current demodulation circuit is connected to the first input and output end of the control module, wherein the electrically tunable demodulation circuit is any one of the current demodulation circuits provided by the sixth aspect.

Compared with the prior art, the method has the following beneficial effects:

the application provides a wireless charging transmitting terminal, a data demodulation method, a data demodulation device, a power source transmitting terminal and a storage medium, wherein the power source transmitting terminal comprises: the device comprises a control module, a power supply module, a driving control circuit, a transmitting coil, a current demodulation circuit and a voltage demodulation circuit; the pulse output end of the control module is connected with the control end of the drive control circuit, the power end of the drive control circuit is also connected with the power wiring end of the power module, and the two output ends of the drive control circuit are also connected with the two wiring ends of the transmitting coil; the input end of the current demodulation circuit is connected with the power supply wiring terminal, the output end of the current demodulation circuit is connected with the first input and output end of the control module, the input end of the voltage demodulation circuit is connected with any wiring section of the transmitting coil, and the output end of the voltage demodulation circuit is connected with the second input and output end of the control module. Therefore, the current demodulation circuit and the voltage demodulation circuit are adopted, the current demodulation signal and the voltage demodulation signal are considered at the same time, even if one of the two demodulation signals is in error, the demodulation data can be successfully obtained, the demodulation success rate of the amplitude shift keying signal is improved, the stability, reliability and safety of communication signals of the power receiving end and the power transmitting end in the wireless charging system are ensured, and the charging requirement of the power receiving end is accurately realized.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a power transmitting end in a wireless charging system according to an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of a current demodulation circuit according to an embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of another current demodulation circuit provided in an embodiment of the present application;

fig. 4 is a schematic structural diagram of a current amplifying and demodulating circuit according to an embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of a voltage demodulation circuit according to an embodiment of the present disclosure;

fig. 6 is a schematic flowchart of a wireless charging data demodulation method according to an embodiment of the present disclosure;

fig. 7 is a schematic flowchart of a demodulation data verification method according to an embodiment of the present application;

fig. 8 is a flowchart illustrating a method for determining target demodulation data according to another embodiment of the present application;

fig. 9 is a schematic flowchart of another method for determining target demodulation data according to an embodiment of the present application;

fig. 10 is a schematic flowchart of a checking method for restructured demodulated data according to an embodiment of the present application;

fig. 11 is a schematic structural diagram of a power transmitting end in another wireless charging system according to an embodiment of the present disclosure;

fig. 12 is a schematic diagram of a wireless charging data demodulation apparatus according to an embodiment of the present application;

fig. 13 is a schematic diagram of a control device according to an embodiment of the present application.

Icon: 100-control module, 200-power module, 300-drive control circuit, 400-transmitting coil, 500-current demodulation circuit, 600-voltage demodulation circuit, 501-amplification module, 502-DC-isolating AC module, 503-current demodulation module, 601-peak detection circuit, 602-voltage division filtering amplification circuit, R-sampling resistor, U1-first comparator, R1-first resistor, R2-second resistor, R3-third resistor, C-filter capacitor, U2-second comparator, 5031-first filter unit, 5032-second filter unit, R4-fourth resistor, C1-first capacitor, R5-fifth resistor, C2-second capacitor, 1201-acquisition module, 1202-first processing module, 1203-second processing module, 1203-first processing module, 1203-second processing module, 1204-checking module, 1205-determining module, 1301-processor, 1302-storage medium.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all embodiments of the present application. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

Furthermore, the appearances of the terms "first," "second," and the like, if any, are only used to distinguish one description from another and are not to be construed as indicating or implying relative importance.

It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.

In the wireless charging process, the wireless charging system comprises a power transmitting end and a power receiving end, wherein the power transmitting end is set as charger equipment, and the power receiving end is equipment to be charged. When the wireless charging is carried out, the power receiving end can send transmission data to the power transmitting end through the receiving coil, the transmission data protects the charging requirement of the power receiving end, and amplitude shift keying signal transmission is adopted. The power transmitting terminal receives the amplitude shift keying signal through the transmitting coil, demodulates the amplitude shift keying signal to obtain transmission data, and charges the power receiving terminal according to the transmission data so as to meet the charging requirement of the power receiving terminal.

In order to improve the stability and the safety of charging, the application provides a power transmitting terminal, a wireless charging data demodulation method, a wireless charging data demodulation device and a wireless charging data storage medium in a wireless charging system.

As follows, a power transmitting terminal in a wireless charging system provided in an embodiment of the present application is explained by using a specific example. Fig. 1 is a schematic structural diagram of a power transmitting end in a wireless charging system according to an embodiment of the present disclosure. As shown in fig. 1, the power transmitting terminal includes: the control module 100, the power module 200, the driving control circuit 300, the transmitting coil 400, the current demodulation circuit 500 and the voltage demodulation circuit 600.

Wherein, the pulse output end of the control module 100 is connected to the control end of the driving control circuit 300, the power end of the driving control circuit 300 is further connected to the power terminal of the power module 200, and the two output ends of the driving control circuit 300 are further connected to the two terminals of the transmitting coil 400; the input end of the current demodulation circuit 500 is connected to the power supply terminal, the output end of the current demodulation circuit 500 is connected to the first input/output end of the control module 100, the input end of the voltage demodulation circuit 600 is connected to any one of the connection segments of the transmitting coil 400, and the output end of the voltage demodulation circuit 600 is connected to the second input/output end of the control module 100. For example, the first input/output terminal and the second input/output terminal may be GPIO (General-purpose input/output) terminals; the Pulse output end can be a PWM (Pulse Width Modulation) end; the control end can be a PWM (Pulse Width Modulation) end; the power supply terminal may be a VIN terminal (voltage input terminal).

The amplitude shift keying signal (which carries the charging data transmitted by the power receiving terminal) sent by the power receiving terminal to the power transmitting terminal in the wireless charging system will generate a change in the amplitude value at the transmitting coil 400 of the power transmitting terminal. And the change of the amplitude of the transmitting coil 400 causes the change of the sampling current of the current demodulation circuit 500 and causes the change of the sampling voltage of the voltage demodulation circuit 600. The current demodulation circuit 500 obtains a current demodulation signal according to the sampled current, and the voltage demodulation circuit 600 obtains a voltage demodulation signal according to the sampled voltage, that is, the current demodulation signal and the voltage demodulation signal carry charging data.

The control module 100 obtains the current demodulation signal output by the current demodulation circuit 500 through the first input/output end, obtains the voltage demodulation signal output by the voltage demodulation circuit 600 through the second input/output end, and determines the target demodulation data according to the current demodulation signal and the voltage demodulation signal. The control module 100 generates a pwm signal according to the target demodulation data, and transmits the pwm signal to the control terminal of the driving control circuit 300 through the pulse output terminal. Since the current demodulation signal and the voltage demodulation signal carry the charging data, the pulse width modulation signal further generated by the control module 100 based on the current demodulation signal and the voltage demodulation signal also carries the charging data. The current demodulation circuit 500 and the voltage demodulation circuit 600 are adopted for demodulation, and the current demodulation signal and the voltage demodulation signal are considered at the same time, so that even if one of the two demodulation signals is in error, the demodulation data can be successfully obtained, the demodulation success rate of the amplitude shift keying signal is improved, and the stability and reliability of communication signals of a power receiving end and a power transmitting end in a wireless charging system are ensured.

The connection of the driving control circuit 300, the power module 200 and the transmitting coil 400 together form a power transmitting path, and the power module 200 transmits a power signal to the transmitting coil 400 through the driving control circuit 300. The driving control circuit 300 converts the dc power outputted from the power module 200 into an alternating current required by the transmitting coil 400, and transmits the alternating current to the power receiving terminal through the transmitting coil 400, thereby completing the power transmission of the power transmitting terminal. The driving control circuit 300 is also controlled by the control module 100, receives the pwm signal transmitted by the control module 100, and controls the power module 200 to transmit the power signal to the transmitting coil 400 according to the pwm signal. Since the pwm signal carries the charging data, the driving control circuit 300 controls the power signal transmission in the power transmitting path according to the charging data in the pwm signal, and transmits the power information after being controlled according to the charging data to the transmitting coil 400. And the transmitting coil 400 transmits power information after being controlled according to the charging data to the power receiving terminal. The power source receiving end transmits the charging data to the power source transmitting end, and the power source transmitting end demodulates the charging data and charges the power source receiving end according to the charging data, so that the charging requirement of the power source receiving end is accurately met.

Illustratively, the drive control circuit 300 may be a bridge drive control circuit. The bridge driving control circuit includes: a pulse width modulation drive circuit and an H-bridge circuit. One end of the pwm driving circuit is connected to two pulse output ends of the control module 100, and the other end of the pwm driving circuit is connected to the H-bridge circuit to control four MOS transistors (MOSFET, fet) in the H-bridge circuit through two driving circuits, wherein each driving circuit controls two MOS transistors in the H-bridge circuit, so as to avoid the control module from controlling four MOS transistors through one driving circuit, and the driving capability that results is weak, and the drive control requirement cannot be satisfied. The H-bridge circuit comprises a preset capacitor, a preset coil, a preset resistor and four MOS (metal oxide semiconductor) tubes, wherein the input end of the H-bridge circuit is a power supply end of the drive control circuit, and the output end of the H-bridge circuit is an output end of the drive control circuit 300. The control module 100 generates two complementary pulse width modulation signals, directly controls the four MOS transistors after passing through the pulse width modulation driving circuit, forms a varying current on the preset coil by the alternate conduction of the upper and lower tubes, realizes the process of converting a direct current power supply into an alternating current, and transmits the alternating current to the transmitting coil 400.

The embodiment of the application also provides a current demodulation circuit. Fig. 2 is a schematic structural diagram of a current demodulation circuit according to an embodiment of the present disclosure. As shown in fig. 2, the current demodulation circuit 500 includes: a sampling resistor R, an amplifying module 501 and a current demodulating module 503.

The sampling resistor R is arranged on the power supply loop to collect power supply current on the power supply loop; two input ends of the amplifying module 501 are respectively connected to two ends of the sampling resistor R to amplify the power supply current; the output end of the amplifying module 501 is connected with the input end of the current demodulating module 503; one end of the sampling resistor R is an input end of the current demodulation circuit 500, and an output end of the current demodulation module 503 is an output end of the current demodulation circuit 500.

Illustratively, during operation of the current demodulation circuit 500, current flows through the sampling resistor in real time. When current flows through the sampling resistor, a slight current difference exists between the two ends of the sampling resistor R, and the slight current difference carries the amplitude shift keying signal. The small current difference is amplified by the amplifying module 501 and then transmitted to the current demodulating module 503. The current demodulation module 503 is configured to demodulate the amplified signal to generate a current demodulation signal. The current demodulation signal is a square wave signal similar to a sine wave. Compared with voltage, the anti-interference performance of current is strong, and the anti-interference performance of the amplitude shift keying signal is strong through sampling, amplifying and demodulating the current. Moreover, the current demodulation circuit 500 is simple in structure, convenient to implement and capable of reducing circuit cost.

On the basis of the above fig. 2, the embodiment of the present application further provides another current demodulation circuit. Fig. 3 is a schematic structural diagram of another current demodulation circuit according to an embodiment of the present disclosure. As shown in fig. 3, the current demodulation circuit 500 further includes: the bulkhead passes through the intersection module 502.

The output end of the amplifying module 501 is connected to the input end of the dc-blocking ac module 502, and the output end of the dc-blocking ac module 502 is connected to the input end of the current demodulating module 503. The block-through ac module 502 is configured to block a dc signal, pass an ac signal, and transmit the ac signal to the current demodulation module 503. The current demodulation module 503 demodulates the ac signal to generate an ac demodulated signal.

With continued reference to fig. 3, the dc blocking ac module 502 is a capacitor. In a dc circuit, the capacitance is equivalent to an open circuit; however, in an ac circuit, the direction of the current changes as a function of time, and the process of charging and discharging the capacitor has time, in which case a changing electric field is formed between the plates, which is also a function of time, and in fact the current passes between the capacitors in the form of an electric field. Namely, the capacitor can achieve the effect of isolating direct current and alternating current by blocking direct current signals and alternating current signals.

On the basis of the above fig. 2, the embodiment of the present application further provides a current amplifying and demodulating circuit. Fig. 4 is a schematic structural diagram of a current amplifying and demodulating circuit according to an embodiment of the present disclosure. As shown in fig. 4, the amplifying module 501 is: the circuit comprises a first comparator U1, a first resistor R1, a second resistor R2, a third resistor R3 and a filter capacitor C.

The non-inverting input end of the first comparator U1 is connected with one end of the sampling resistor R through a first resistor R1, the inverting input end of the first comparator U1 is connected with the other end of the sampling resistor R through a second resistor R2, the non-inverting input end of the first comparator U1 is also connected with the inverting input end through a filter capacitor C, and the inverting input end of the first comparator U1 is also connected with the output end of the first comparator U1 through a third resistor R3; the output of the first comparator U1 is the output of the amplification module 501.

The first resistor R1 plays a role of amplitude limiting, and the filter capacitor C is used for filtering. The amplification factor of the amplification module 501 can be determined by the resistances of the second resistor R2 and the third resistor R3, and is used for calculating the amplification voltage, and the specific calculation method is as shown in the following formula (1):

(1)

wherein the content of the first and second substances,

is the resistance value of the second resistor and is,

is the resistance value of the third resistor and is,

in order to amplify the voltage, the voltage is,

is the sampling voltage value at one end of the sampling resistor,

is the sampling voltage value at the other end of the sampling resistor.

With continued reference to fig. 4, the current demodulation module 503 includes: a second comparator U2, a first filtering unit 5031 and a second filtering unit 5032.

The output end of the amplifying module 501 is connected to the non-inverting input end of the second comparator U2 through the first filtering unit 5031, the output end of the amplifying module 501 is connected to the inverting input end of the second comparator U2 through the second filtering unit 5032, and the output end of the second comparator U2 is the output end of the current demodulating module 503.

The first filtering unit 5031 includes: a fourth resistor R4 and a first capacitor C1; the second filtering unit 5032 includes: a fifth resistor R5 and a second capacitor C2. For example, when the capacitance values of the first capacitor C1 and the second capacitor C2 are set to be different, a voltage difference is formed due to the difference between the capacitance values of the first capacitor C1 and the second capacitor C2; the two paths of voltage with the voltage difference can generate a current demodulation signal through the second comparator U2, wherein the current demodulation signal is a square wave signal similar to a sine wave.

The embodiment of the application further provides a voltage demodulation circuit. Fig. 5 is a schematic structural diagram of a voltage demodulation circuit according to an embodiment of the present disclosure. As shown in fig. 5, the voltage demodulation circuit 600 includes: a peak detection circuit 601 and a voltage division filter amplifier circuit 602. The input terminal of the peak detector circuit 601 is the input terminal of the voltage demodulator circuit 600, the output terminal of the peak detector circuit 601 is further connected to the input terminal of the voltage-dividing filter amplifier circuit 602, and the output terminal of the voltage-dividing filter amplifier circuit 602 is the output terminal of the voltage demodulator circuit 600.

In the working process, the voltage demodulation circuit 600 obtains a sampling voltage by sampling a signal transmitted by the transmitting coil, and the sampling voltage carries an amplitude shift keying signal. The peak detection circuit 601 performs peak detection on the sampled voltage to obtain an envelope signal, and since the peak detection circuit 601 includes a capacitor for isolating direct current from alternating current, the envelope signal is an alternating current signal. The voltage-dividing filtering amplifying circuit 602 divides, amplifies, and filters the envelope signal to obtain a voltage demodulation signal, and transmits the voltage demodulation signal to the control module 100, wherein the voltage demodulation signal is a square wave signal similar to a sine wave. It should be noted that this is merely an example of a voltage demodulation circuit, and it is within the scope of the present application to provide a current demodulation circuit that generates a voltage demodulation signal.

To sum up, the power transmitting terminal in the wireless charging system provided by the embodiment of the present application includes: the device comprises a control module, a power supply module, a driving control circuit, a transmitting coil, a current demodulation circuit and a voltage demodulation circuit; the pulse output end of the control module is connected with the control end of the drive control circuit, the power end of the drive control circuit is also connected with the power wiring end of the power module, and the two output ends of the drive control circuit are also connected with the two wiring ends of the transmitting coil; the input end of the current demodulation circuit is connected with the power supply wiring terminal, the output end of the current demodulation circuit is connected with the first input and output end of the control module, the input end of the voltage demodulation circuit is connected with any wiring section of the transmitting coil, and the output end of the voltage demodulation circuit is connected with the second input and output end of the control module. Therefore, the current demodulation circuit and the voltage demodulation circuit are adopted, the current demodulation signal and the voltage demodulation signal are considered at the same time, even if one of the two demodulation signals is in error, the demodulation data can be successfully obtained, the demodulation success rate of the amplitude shift keying signal is improved, the stability, reliability and safety of communication signals of the power receiving end and the power transmitting end in the wireless charging system are ensured, and the charging requirement of the power receiving end is accurately realized.

On the basis of the power transmitting terminal in the wireless charging system described in fig. 1, an embodiment of the present application further provides a wireless charging data demodulation method. Fig. 6 is a flowchart illustrating a wireless charging data demodulation method according to an embodiment of the present disclosure, where an execution main body of the method may be a control module in a power transmitting end, and the control module may be a control device having a calculation processing function. As shown in fig. 6, the method includes:

s101, acquiring a current demodulation signal output by the current demodulation circuit and a voltage demodulation signal output by the voltage demodulation circuit.

The current demodulation circuit acquires a current demodulation signal, and the voltage demodulation circuit acquires a voltage demodulation signal. The power supply receiving end sends an amplitude shift keying signal carrying charging data to the power supply transmitting end, and the current demodulation signal is a square wave signal similar to a sine wave and obtained by sampling and demodulating current on the power supply transmitting end circuit; the voltage demodulation signal is obtained by sampling and demodulating the voltage of the transmitting coil, is a square wave signal similar to a sine wave, and is charging data in the amplitude shift keying signal carried by both the current demodulation signal and the voltage demodulation signal.

And S102, processing the current demodulation signal to obtain current demodulation data.

The current demodulation signal is a sine-like square wave signal, namely an analog signal, the sine-like square wave signal is received, and the sine-like square wave signal is converted into a digital signal to obtain current demodulation data corresponding to the current demodulation signal. Since the current demodulation signal carries the charging data of the amplitude shift keying signal, the current demodulation data also carries the charging data of the amplitude shift keying signal.

And S103, processing the voltage demodulation signal to obtain voltage demodulation data.

The voltage demodulation signal is a sine-like square wave signal, namely an analog signal, the sine-like square wave signal is received, and the sine-like square wave signal is converted into a digital signal to obtain voltage demodulation data corresponding to the voltage demodulation signal. Since the voltage demodulation signal carries the charging data of the amplitude shift keying signal, the voltage demodulation data also carries the charging data of the amplitude shift keying signal.

And S104, respectively verifying the current demodulation data and the voltage demodulation data.

After the current demodulation data and the voltage demodulation data are obtained through conversion, the current demodulation data need to be verified according to verification information in the current demodulation data, and the voltage demodulation data need to be verified according to verification information in the voltage demodulation data. Since the current demodulation data and the voltage demodulation data both carry the charging data of the amplitude shift keying signal, the current demodulation data and the voltage demodulation data are respectively verified, that is, the charging data of the amplitude shift keying signal carried on the current demodulation data and the voltage demodulation data are verified. The method is used for checking whether the charging data of the amplitude shift keying signal has the situations of packet loss, packet leakage, packet error and the like in the current demodulation and voltage demodulation processes.

And S105, determining target demodulation data according to the verification result, the voltage demodulation data and the current demodulation data.

If the verification result meets the verification requirement, target demodulation data can be determined according to the voltage demodulation data and the current demodulation data, the charging data carried by the target demodulation data meets the verification requirement, the charging data carried by the target demodulation data is the charging data in the transmission data of the power receiving end in the wireless charging system, namely the target demodulation data is the transmission data from the power receiving end in the wireless charging system, the demodulation process is completed, and the demodulation is correct. The target demodulation data is obtained through two demodulation modes of voltage demodulation and current demodulation, so that the probability of packet loss, packet leakage, packet error and the like of the data is greatly reduced, the accuracy of data demodulation is improved, the stability and reliability of communication signals of a power receiving end and a power transmitting end in a wireless charging system are ensured, and the charging requirement of the power receiving end is accurately met.

In summary, the wireless charging data demodulation method provided in the embodiment of the present application includes: acquiring a current demodulation signal output by a current demodulation circuit and a voltage demodulation signal output by a voltage demodulation circuit; processing the current demodulation signal to obtain current demodulation data; processing the voltage demodulation signal to obtain voltage demodulation data; respectively checking the current demodulation data and the voltage demodulation data; and determining target demodulation data according to the verification result, the voltage demodulation data and the current demodulation data, wherein the target demodulation data are transmission data from a power receiving end in the wireless charging system. Therefore, target demodulation data are obtained through two demodulation modes of voltage demodulation and current demodulation, the possibility that the data are lost, missed, mistaken and the like is greatly reduced, the accuracy of data demodulation is improved, the stability, reliability and safety of communication signals of a power receiving end and a power transmitting end in a wireless charging system are guaranteed, and the charging requirement of the power receiving end is accurately met.

On the basis of the wireless charging data demodulation method described in fig. 6, an embodiment of the present application further provides a demodulation data verification method. Fig. 7 is a schematic flowchart of a demodulation data verification method according to an embodiment of the present application. As shown in fig. 7, S104 respectively verifies the current demodulation data and the voltage demodulation data, including:

s201, calculating a first header information length of each demodulation data according to the header of each demodulation data in the current demodulation data and the voltage demodulation data.

In the QI protocol, a packet consists of preamble, header, information, checksum.

Where the preamble is composed of a minimum of 11 bits and a maximum of 25 bits, all set to "ONE" and encoded as defined in section 5.2.2 "physical and data link layer" of the Qi protocol, the preamble enables the power transmitting end to synchronize with the incoming data and accurately detect the start bit of the header. The header is composed of a single byte and is used for displaying the type of the data packet, and the header implicitly provides the size (information length) of the information contained in the data packet, i.e., the number of bytes in the information can be calculated according to the value contained in the header of the data packet. The information is the actual data content sent to the power transmitting end by the power receiving end, and when the power receiving end sends data, the information contained in the data packet is ensured to be consistent with the type of the data packet displayed by the header. The checksum consists of a single byte that enables the power transmitting end to check for data transmission errors.

Since the header implicitly provides the length of information contained in the data packet, the first header information length of each demodulated data can be calculated from the header in each of the current demodulated data and the voltage demodulated data.

Illustratively, if the data is: 20000323, wherein the header is: 20, information is 0003, checksum is: 23. the first header information length calculated from the header of the data is calculated as follows:

2 + (0x20 - 32 ) / 16

= 2 + (0) / 16

= 2

that is, the first header information length of the data calculated by the header is 2, and if the information is 0003, and the information length is 2, it can be determined that the first header information length calculated by the header is the correct information length.

S202, performing first check according to the first header information length of each demodulated data and the corresponding first actual information length.

A first actual information length of information in each demodulated data is obtained. And comparing the first header information length of each demodulated data with the corresponding first actual information length. Through comparison, if the first header information length is equal to the corresponding first actual information length, it indicates that the information lengths are consistent in the data transmission process, and the first check is passed. If the first header information length is not equal to the corresponding first actual information length, it indicates that the information length has changed during the data transmission, and the situations of packet loss, packet missing, and the like may occur, and the first check is not passed.

And S203, calculating a first calculated checksum of each demodulated data according to the header and the information in each demodulated data.

The checksum is calculated as shown in the following equation (2):

（2）

where C represents the calculated checksum, H represents the header byte, B0, B1

Representing a number of bytes in the information. If the calculated checksum calculated from the header and information in the data packet is equal to the checksum byte contained in the data packet, the data can be determined to be accurate.

Since the checksum can verify the accuracy of the data, a first calculated checksum for each demodulated data can be calculated from the header and information in each demodulated data in the current demodulated data and the voltage demodulated data for comparison with the actual checksum.

Illustratively, if the data is: 20000323, wherein the header is: 20, information is 0003, checksum is: 23. the first calculated checksum of the data calculated by the checksum calculation formula is as follows:

and the checksum in the data is: and 23, if the checksum is the same as the first calculation checksum, it indicates that the received data is accurate data, and no data packet loss, packet missing, packet error, or the like occurs.

S204, carrying out second check according to the first calculated check sum of each demodulated data and the first actual check sum in each demodulated data.

A first actual checksum of the information in each demodulated data is obtained. And comparing the first calculated checksum from each demodulated data with the corresponding first actual checksum. By comparison, if the first calculated checksum and the corresponding first actual checksum are equal, it indicates that the header and the data in the information are not changed in the data transmission process, and the second checksum passes the second checksum. If the first calculated checksum is not equal to the corresponding first actual checksum, it indicates that the header and the data in the information are changed during the data transmission process, and the situations of packet loss, packet missing, packet error and the like may occur, and the second checksum is not passed.

S205, if the first check and the second check both pass, determining that the demodulation data passes the check.

If the demodulated data passes the first check and the second check, determining that the actual data content and the information length of the demodulated data are not changed, and indicating that the demodulated data does not have the situations of packet loss, packet leakage, packet error and the like, namely determining that the demodulated data passes the check.

S206, if the first check and/or the second check are/is not passed, determining that the demodulation data check is not passed.

If the first check and the second check of the demodulated data do not pass or do not pass one of the first check and the second check, determining that the actual data content and/or the information length of the demodulated data change, which indicates that the demodulated data may have the situations of packet loss, packet leakage, packet error and the like, that is, determining that the demodulated data check does not pass.

It should be noted that the steps in this embodiment are only an example, the order of performing the first verification and the second verification is not limited, the first verification may be performed first and then the second verification may be performed, the second verification may be performed first and then the first verification may be performed, and the first verification and the second verification may be performed simultaneously.

To sum up, a demodulation data verification method provided in the embodiment of the present application includes: calculating a first header information length of each demodulated data according to the header in each demodulated data in the current demodulated data and the voltage demodulated data; performing first check according to the first header information length of each demodulated data and the corresponding first actual information length; calculating a first calculated checksum for each demodulated data based on the header and information in each demodulated data; performing a second check based on the first calculated checksum in each demodulated data and the first actual checksum in each demodulated data; if the first check and the second check both pass, determining that the demodulation data check passes; and if the first check and/or the second check are not passed, determining that the demodulation data check is not passed. Therefore, by verifying the information length of the demodulated data and the actual data content, the demodulated data can pass the verification only if the information length and the actual data content are accurate and correct, so that the accuracy of the demodulated data verification is ensured.

On the basis of the wireless charging data demodulation method described in fig. 6, an embodiment of the present application further provides a method for determining target demodulation data. Fig. 8 is a flowchart illustrating a method for determining target demodulation data according to another embodiment of the present application. As shown in fig. 8, the step S105 of determining, according to the verification result, the voltage demodulation data and the current demodulation data, that the target demodulation data is transmission data from the power receiving end in the wireless charging system includes:

and S301, if the verification result is that both the current demodulation data and the voltage demodulation data pass verification, determining any demodulation data in the current demodulation data and the voltage demodulation data as target demodulation data.

If the verification result is that both the current demodulation data and the voltage demodulation data pass verification, the charging data carried by the current demodulation data meet the verification requirement and are consistent with the transmission data; the charging data carried by the current demodulation data accords with the verification requirement and is consistent with the transmission data. The transmission data can be determined based on any one of the current demodulation data and the voltage demodulation data. It is determined that either one of the current demodulation data and the voltage demodulation data can be used as the target demodulation data.

With continued reference to fig. 8, S105 determines, according to the verification result, the voltage demodulation data, and the current demodulation data, that the target demodulation data is transmission data from a power receiving end in the wireless charging system, and further includes:

and S302, if the verification result is that one of the current demodulation data and the voltage demodulation data passes the verification, determining the demodulation data passing the verification as target demodulation data.

And if the verification result is that one of the current demodulation data and the voltage demodulation data passes the verification, the demodulation data passing the verification meets the verification requirement and keeps consistent with the transmission data. The transmission data can be determined from the demodulated data that passes the verification. The demodulated data that passes the verification is determined as the target demodulated data.

And obtaining target demodulation data by two demodulation modes of voltage demodulation and current demodulation, wherein the current demodulation data and the voltage demodulation data pass the inspection, or the target demodulation data can be obtained as long as one verification passes. The probability of packet loss, packet missing, packet error and the like of the data is greatly reduced, and the accuracy of data demodulation is improved.

In summary, according to the method for determining target demodulation data provided in the embodiment of the present application, if the verification result indicates that both the current demodulation data and the voltage demodulation data pass the verification, it is determined that any one of the current demodulation data and the voltage demodulation data is used as the target demodulation data; and if the verification result is that one verification is passed in the current demodulation data and the voltage demodulation data, determining the demodulation data passed by the verification as target demodulation data. Therefore, the target demodulation data is obtained through two demodulation modes of voltage demodulation and current demodulation, the probability of the data that the packet is lost, missed, mistaken and the like is greatly reduced, and the accuracy of data demodulation is improved.

On the basis of the wireless charging data demodulation method described in fig. 6, another method for determining target demodulation data is provided in the embodiments of the present application. Fig. 9 is a flowchart illustrating another method for determining target demodulation data according to an embodiment of the present application. As shown in fig. 9, S105 determines, according to the verification result, the voltage demodulation data, and the current demodulation data, that the target demodulation data is transmission data from a power receiving end in the wireless charging system, and further includes:

s401, if the verification result is that both the current demodulation data and the voltage demodulation data are not verified, pairing and combining the current demodulation data and the voltage demodulation data byte by byte to obtain a plurality of recombined demodulation data.

If the verification result indicates that both the current demodulation data and the voltage demodulation data are not verified, it indicates that both the current demodulation data and the voltage demodulation data may have the situations of packet loss, packet leakage, packet error and the like. At the moment, the current demodulation data and the voltage demodulation data are recombined by taking bytes as units, and the recombined demodulation data is obtained by replacing the bytes at different positions in the two kinds of demodulation data, so that the situations of packet loss, packet leakage, packet error and the like can be overcome.

When packet loss and packet leakage occur in the data, the byte positions of the packet loss and the packet leakage still exist, when a packet error occurs in the data, the byte position of the packet error is an error byte, and if the byte at the position is replaced by a correct byte to obtain recombined demodulation data, the recombined demodulation data can be checked. If the data packet of the 3 rd byte in the current demodulation data is lost, other bytes are correct; the 5 th byte of the voltage demodulation data is error-packaged, and other bytes are correct. Replacing the data of the 3 rd byte in the current demodulation data with the data of the 3 rd byte in the voltage demodulation data to obtain recombined demodulation data; the data of the 5 th byte in the voltage demodulation data can be replaced by the data of the 5 th byte in the current demodulation data to obtain the recombined demodulation data, and the recombined demodulation data overcomes the situations of packet loss, packet leakage, packet error and the like by the replacement mode.

Specific pairing combining methods are shown below. Assuming that the actual length of the demodulated data is N, randomly selecting M bytes of data from the current demodulated data, selecting (N-M) bytes of data from the voltage demodulated data, the M bytes of data having a different position from the M bytes of data, and recombining the M bytes of data in the current demodulated data and the (N-M) bytes of data in the voltage demodulated data into recombined demodulated data. It should be noted that, during replacement and reassembly, only the byte data at the same position is replaced, that is, the actual content of the byte data is replaced, but the position of the byte data is not changed, so that the byte position in the reassembled demodulated data is consistent with the position of the byte in the original data. When the data is selected, the (N-M) byte data is different from the M byte data in position, and when the M byte data in the current demodulation data is selected, the M byte data in the voltage demodulation data is uniquely determined. It should be noted that, it is not limited herein that the selection mode that can achieve the recombination effect is within the protection scope of the present application, if the selection data in the voltage demodulation data is selected first and then determined, or the selection data in the current demodulation data is selected first and then determined.

The number of the plurality of recombined demodulated data may be calculated from the actual length N of the demodulated data by combining the pair combining method as described above, and a specific calculation method is shown in the following formula (3):

（3）

that is, after the pairing combination, there are

The reconstructed demodulated data is then transmitted.

As an example, assume that the current demodulation data is: and A, B, C, voltage demodulation data are as follows: a b c, the length of data is 3, and

then, there are 8 following combinations for the reconstructed demodulated data:

the first method comprises the following steps: a, B and C;

and the second method comprises the following steps: a, B, c;

and the third is that: a, b and C;

and fourthly: a b c;

and a fifth mode: a B C;

and a sixth mode: a B c;

seventh, the method comprises: a b C;

an eighth method: a b c;

it should be noted that the byte position in the reconstructed demodulated data is consistent with the position of the byte in the original data. The location of the preamble, header, information, checksum in the plurality of reassembled demodulated data along with the voltage demodulated data and the current demodulated data meets the QI protocol specifications. The format of each recombined demodulation data, the current demodulation data and the voltage demodulation data is a preset data packet format.

S402, checking the multiple recombined and demodulated data.

There may be reconstructed demodulated data that completely coincides with the charging data of the amplitude shift keying signal among the plurality of reconstructed demodulated data. Therefore, after obtaining the plurality of recombined demodulated data, each recombined demodulated data needs to be verified according to the verification information in the recombined demodulated data. And stopping checking until the demodulation data passing the checking in the plurality of recombined demodulation data is obtained. It should be noted here that if a verified recombined demodulated data is obtained, the verified recombined demodulated data can be processed in the next step, and the rest of the unverified recombined demodulated data does not need to be verified, so as to save effort. If one recombined demodulation data is not passed, the rest recombined demodulation data which is not verified is continuously verified, and when all recombined demodulation data are not verified, all recombined demodulation data can not be processed in the next step.

And S403, determining the demodulation data passing the check in the plurality of recombined demodulation data as target demodulation data.

And if the demodulated data passing the verification in the recombined demodulated data meets the verification requirement, keeping the demodulated data consistent with the transmitted data. The transmission data can be determined from the demodulated data that passes the verification. The demodulated data that passed the verification is determined as the target demodulated data.

When the current demodulation data and the voltage demodulation data are not verified, a plurality of recombined demodulation data can be obtained by pairing and combining the current demodulation data and the voltage demodulation data byte by byte, and the target demodulation data obtained by verifying the recombined demodulation data can be obtained from the recombined demodulation data. Only when all the recombined demodulated data are not verified, the target demodulated data cannot be obtained, and the situation that all the recombined demodulated data are not verified is very few, so that compared with the situation that the target demodulated data is determined solely according to the voltage demodulated data, the demodulation accuracy of the target demodulated data determined according to the current demodulated data, the voltage demodulated data and the recombined demodulated data is greatly improved.

To sum up, according to another method for determining target demodulation data provided by the embodiment of the present application, if the verification result indicates that both the current demodulation data and the voltage demodulation data do not pass the verification, the current demodulation data and the voltage demodulation data are paired and combined byte by byte to obtain a plurality of recombined demodulation data, where the formats of each of the recombined demodulation data, the current demodulation data, and the voltage demodulation data are all preset data packet formats; checking the plurality of recombined demodulated data; and determining the demodulation data passing the check in the plurality of recombined demodulation data as target demodulation data. Therefore, when the current demodulation data and the voltage demodulation data are not verified, a plurality of recombined demodulation data can be obtained through pairing and combination, and then the target demodulation data is determined, and the accuracy of data demodulation is greatly improved.

On the basis of another method for determining target demodulation data described in fig. 9, an embodiment of the present application further provides a verification method for reconstructing demodulation data. Fig. 10 is a flowchart illustrating a verification method for restructured demodulated data according to an embodiment of the present application. As shown in fig. 10, S402 checks the plurality of reassembled demodulated data, including:

s501, calculating the second header information length of each recombined demodulation data according to the header in each recombined demodulation data.

Since the header implicitly provides the length of information contained in the data packet, the second header information length for each reassembled demodulated data can be calculated from the header in each reassembled demodulated data. The specific calculation manner of the second header information length is similar to the example in step S201, and is not described herein again.

S502, performing first check according to the second header information length of each recombined and demodulated data and the corresponding second actual information length.

And acquiring a second actual information length of the information in each recombined and demodulated data. And comparing the second header information length of each recombined demodulated data with the corresponding second actual information length. Through comparison, if the second header information length is equal to the corresponding second actual information length, the information length of the recombined demodulation data is consistent with that of the transmission data, and the first check is passed. If the first header information length is not equal to the corresponding first actual information length, it indicates that the information length of the recombined and demodulated data is changed compared with the transmission data, and the situations of packet loss, packet leakage and the like may occur, and the recombined and demodulated data does not pass the first check.

And S503, calculating a second calculated checksum of each recombined and demodulated data according to the header and the information in each recombined and demodulated data.

Since the checksum may verify the accuracy of the data, a second calculated checksum for each reassembled demodulated data may be calculated from the header and information in each reassembled demodulated data for comparison to the actual checksum. The calculation manner of the second calculation checksum is similar to that of formula (1) in step S203, and is not described herein again.

S504, second check is conducted according to the second calculation check sum of each recombined demodulation data and the second actual check sum of each recombined demodulation data.

A second actual checksum of the information in each demodulated data is obtained. And comparing the second calculated checksum from each demodulated data with the corresponding second actual checksum. By comparison, if the second calculated checksum is equal to the corresponding second actual checksum, it indicates that the re-composed demodulated data is consistent with the header of the transmitted data and the data in the information, and the second checksum passes the second check. If the second calculated checksum is not equal to the corresponding second actual checksum, it indicates that the reconstructed demodulated data is not subjected to the second checksum when the packet loss, the packet leakage, the packet error, and the like may occur due to the change of the data in the header and the information compared with the transmitted data.

And S505, if the first check and the second check both pass, determining that the recombined demodulated data passes the check.

And if the recombined demodulation data passes the first check and the second check, determining that the actual data content and the information length of the recombined demodulation data are consistent with the transmission data. And comparing the recombined demodulation data with the transmission data, and determining that the recombined demodulation data passes the check if packet loss, packet leakage, packet error and the like do not occur.

S506, if the first check and/or the second check are not passed, it is determined that the recombined demodulated data check is not passed.

And if the first check and the second check of the demodulated data do not pass or do not pass one of the first check and the second check, determining that the actual data content and/or the information length of the demodulated data are changed compared with the transmitted data. The situation that packet loss, packet leakage, packet error and the like may occur in the demodulated data compared with the transmission data is explained, that is, it is determined that the demodulated data check fails.

In summary, according to the verification method for the restructured demodulated data provided by the embodiment of the present application, the second header information length of each restructured demodulated data is calculated according to the header in each restructured demodulated data; performing first verification according to the second header information length of each recombined and demodulated data and the corresponding second actual information length; calculating a second calculated checksum for each reconstructed demodulated data based on the header and information in each reconstructed demodulated data; performing a second check according to the second calculated checksum of each reconstructed demodulated data and the second actual checksum in each reconstructed demodulated data; if the first check and the second check both pass, determining that the recombined demodulation data passes the check; and if the first check and/or the second check are/is not passed, determining that the recombined demodulated data check is not passed. Therefore, by verifying the information length and the actual data content of the re-demodulation data, the verification can be passed only if the information length and the actual data content are accurate, so as to ensure the verification accuracy of the re-demodulation data.

In addition, the embodiment of the application also provides a current demodulation circuit. A current demodulation circuit provided herein is similar to any of the current demodulation circuits provided in the embodiments shown in fig. 2 to 4, and the detailed circuit structure is not repeated. By sampling, amplifying and demodulating the current, the anti-interference performance of the amplitude shift keying signal is enhanced, the structure is simple, the implementation is convenient, and the circuit cost is reduced.

On the basis of any one of the current demodulation circuits provided in the embodiments shown in fig. 2 to fig. 4, the embodiment of the present application further provides another power source transmitting terminal in a wireless charging system. Fig. 11 is a schematic structural diagram of a power transmitting end in another wireless charging system according to an embodiment of the present application. As shown in fig. 11, the power transmitting terminal includes: control module, power module, drive control circuit, transmitting coil, current demodulation circuit.

Wherein, the pulse output end of the control module 100 is connected to the control end of the driving control circuit 300, the power end of the driving control circuit 300 is further connected to the power terminal of the power module 200, and the two output ends of the driving control circuit 300 are further connected to the two terminals of the transmitting coil 400; an input end of the current demodulation circuit 500 is connected to the power supply terminal, and an output end of the current demodulation circuit 500 is connected to a first input and output end of the control module 100, where the electrically tunable demodulation circuit is any one of the current demodulation circuits provided in the embodiments shown in fig. 2 to fig. 4.

For example, the first input/output terminal may be a GPIO (General-purpose input/output) terminal; the Pulse output end can be a PWM (Pulse Width Modulation) end; the control end can be a PWM (Pulse Width Modulation) end; the power supply terminal may be a VIN terminal (voltage input terminal).

An amplitude shift keying signal (the amplitude shift keying signal carries charging data transmitted by the power source receiving terminal) sent from the power source receiving terminal to the power source transmitting terminal in the wireless charging system can generate amplitude value change in a transmitting coil 400 of the power source transmitting terminal. And a change in the amplitude of the transmitting coil 400 causes a change in the sampling current of the current demodulating circuit 500. The current demodulation circuit 500 obtains a current demodulation signal according to the sampled current, that is, the current demodulation signal carries charging data. For example, the current demodulation circuit 500 may be the circuit described in any of fig. 8-9.

The control module 100 obtains the current demodulation signal output by the current demodulation circuit 500 through the first input/output end, and determines the target demodulation data according to the current demodulation signal. The control module 100 generates a pwm signal according to the target demodulation data, and transmits the pwm signal to the control terminal of the driving control circuit 300 through the pulse output terminal. Since the charging data is carried in the current demodulation signal, the pulse width modulation signal further generated by the control module 100 based on the current demodulation signal also carries the charging data. The current demodulation circuit 500 is adopted for demodulation, so that the anti-interference performance of the amplitude shift keying signal is enhanced, and the demodulation success rate of the amplitude shift keying signal is improved.

The connection of the driving control circuit 300, the power module 200 and the transmitting coil 400 together form a power transmitting path, and the power module 200 transmits a power signal to the transmitting coil 400 through the driving control circuit 300. And the driving control circuit 300 changes the dc power outputted from the power module 200 into the alternating current required by the input of the transmitting coil 400. And transmits the alternating current to the transmitting coil 400 and transmits to the power receiving terminal through the transmitting coil 400, completing power transmission of the power transmitting terminal. The driving control circuit 300 is also controlled by the control module 100, receives the pwm signal transmitted by the control module 100, and controls the power module 200 to transmit the power signal to the transmitting coil 400 according to the pwm signal. Since the pwm signal carries the charging data, the driving control circuit 300 controls the power signal transmission in the power transmitting path according to the charging data in the pwm signal, and transmits the power information after being controlled according to the charging data to the transmitting coil 400. And the transmitting coil 400 transmits power information after being controlled according to the charging data to the power receiving terminal. The power source receiving end transmits the charging data to the power source transmitting end, and the power source transmitting end demodulates the charging data and charges the power source receiving end according to the charging data, so that the charging requirement of the power source receiving end is accurately met.

Illustratively, the drive control circuit 300 may be a bridge drive control circuit. The bridge driving control circuit includes: a pulse width modulation drive circuit and an H-bridge circuit. One end of the pwm driving circuit is connected to two pulse output terminals of the control module 100, and the other end of the pwm driving circuit is connected to the H-bridge circuit, so as to control four MOS transistors (MOSFET, field effect transistor) in the H-bridge circuit through two driving circuits. Wherein, every way drive circuit respectively controls two MOS pipes in the H bridge circuit to avoid control module to pass through four MOS pipes of drive circuit control of the same kind, and the drive capacity that leads to is relatively weak, can't satisfy the drive control demand. The H-bridge circuit comprises a preset capacitor, a preset coil, a preset resistor and four MOS (metal oxide semiconductor) tubes, wherein the input end of the H-bridge circuit is a power supply end of the drive control circuit, and the output end of the H-bridge circuit is an output end of the drive control circuit 300. The control module 100 generates two complementary pulse width modulation signals, directly controls the four MOS transistors after passing through the pulse width modulation driving circuit, forms a varying current on the preset coil by the alternate conduction of the upper and lower tubes, realizes the process of converting a direct current power supply into an alternating current, and transmits the alternating current to the transmitting coil 400.

To sum up, the power transmitting terminal in another wireless charging system provided in the embodiment of the present application includes: the device comprises a control module, a power supply module, a driving control circuit, a transmitting coil and a current demodulation circuit; the pulse output end of the control module is connected with the control end of the drive control circuit, the power supply end of the drive control circuit is also connected with the power supply wiring end of the power supply module, and the two output ends of the drive control circuit are also connected with the two wiring ends of the transmitting coil; the input end of the current demodulation circuit is connected with the power supply wiring terminal, and the output end of the current demodulation circuit is connected with the first input and output end of the control module. The amplitude shift keying signal is obtained through the current demodulation signal, so that the anti-interference performance of the amplitude shift keying signal is enhanced, the demodulation success rate of the amplitude shift keying signal is improved, and the charging requirement of a power supply receiving end is accurately met.

For the following description, specific implementation processes and technical effects of the wireless charging data demodulation apparatus, the control device, and the storage medium provided by the present application for implementation are described above, and will not be described again below.

Fig. 12 is a schematic diagram of a wireless charging data demodulation apparatus according to an embodiment of the present application, and as shown in fig. 12, the demodulation apparatus may include:

an obtaining module 1201, configured to obtain a current demodulation signal output by the current demodulation circuit and a voltage demodulation signal output by the voltage demodulation circuit;

a first processing module 1202, configured to process the current demodulation signal to obtain current demodulation data;

a second processing module 1203, configured to process the voltage demodulation signal to obtain voltage demodulation data;

a verification module 1204, configured to verify the current demodulation data and the voltage demodulation data respectively;

the determining module 1205 determines target demodulation data according to the verification result, the voltage demodulation data, and the current demodulation data, where the target demodulation data is transmission data from a power receiving end in the wireless charging system.

Further, the verifying module 1204 is specifically configured to calculate a first header information length of each demodulated data according to a header in each demodulated data in the current demodulated data and the voltage demodulated data; performing first verification according to the first header information length of each demodulation data and the corresponding first actual information length; calculating a first calculated checksum for each demodulated data based on the header and information in each demodulated data; performing a second check based on the first calculated checksum in each demodulated data and the first actual checksum in each demodulated data; if the first check and the second check both pass, determining that the demodulation data check passes; and if the first check and/or the second check are/is not passed, determining that the demodulation data check is not passed.

Further, the determining module 1205 is specifically configured to determine, if the verification result indicates that both the current demodulation data and the voltage demodulation data pass the verification, any demodulation data of the current demodulation data and the voltage demodulation data as the target demodulation data.

Further, the determining module 1205 is further specifically configured to determine, if the verification result is that one of the current demodulation data and the voltage demodulation data passes the verification, that the demodulation data that passes the verification is used as the target demodulation data.

Further, the determining module 1205 is further configured to, if the check result indicates that both the current demodulation data and the voltage demodulation data do not pass the check, pair and combine the current demodulation data and the voltage demodulation data byte by byte to obtain a plurality of recombined demodulation data, where formats of each of the recombined demodulation data, the current demodulation data, and the voltage demodulation data are all preset data packet formats; checking the plurality of recombined demodulated data; and determining the demodulation data passing the check in the plurality of recombined demodulation data as target demodulation data.

Further, the determining module 1205 is specifically configured to calculate a second header information length of each re-composed demodulated data according to the header in each re-composed demodulated data; performing first verification according to the second header information length of each recombined and demodulated data and the corresponding second actual information length; calculating a second calculated checksum for each reconstructed demodulated data based on the header and information in each reconstructed demodulated data; performing a second check according to the second calculated checksum of each reconstructed demodulated data and the second actual checksum in each reconstructed demodulated data; if the first check and the second check both pass, determining that the recombined demodulation data passes the check; and if the first check and/or the second check are not passed, determining that the recombined demodulation data check is not passed.

The above modules may be one or more integrated circuits configured to implement the above methods, such as: one or more Application Specific Integrated Circuits (ASICs), or one or more microprocessors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs), among others. For another example, when one of the above modules is implemented in the form of a Processing element scheduler code, the Processing element may be a general-purpose processor, such as a Central Processing Unit (CPU) or other processor capable of calling program code. For another example, these modules may be integrated together and implemented in the form of a system-on-a-chip (SOC).

Fig. 13 is a schematic diagram of a control device according to an embodiment of the present application, where the control device may be a device with a calculation processing function.

The control apparatus includes: a processor 1301, a storage medium 1302. The processor 1301 and the storage medium 1302 are connected via a bus. The storage medium 1302 is used for storing a program, and the processor 1301 calls the program stored in the storage medium 1302 to execute the above-mentioned method embodiments. The specific implementation and technical effects are similar, and are not described herein again.

Optionally, the invention also provides a program product, for example a computer-readable storage medium, comprising a program which, when being executed by a processor, is adapted to carry out the above-mentioned method embodiments.

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

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment. In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.

The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions to enable a computer device (which may be a personal computer, a server, or a network device) or a processor (in english: processor) to execute some steps of the methods according to the embodiments of the present invention. And the aforementioned storage medium includes: a U disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

Claims

1. A power transmitting terminal in a wireless charging system, the power transmitting terminal comprising: the device comprises a control module, a power supply module, a driving control circuit, a transmitting coil, a current demodulation circuit and a voltage demodulation circuit;

the input end of the current demodulation circuit is connected with the power supply wiring terminal, the output end of the current demodulation circuit is connected with the first input and output end of the control module, the input end of the voltage demodulation circuit is connected with any wiring section of the transmitting coil, and the output end of the voltage demodulation circuit is connected with the second input and output end of the control module;

the control module is used for processing the current demodulation signal output by the current demodulation circuit to obtain current demodulation data and processing the voltage demodulation signal output by the voltage demodulation circuit to obtain voltage demodulation data; respectively verifying the current demodulation data and the voltage demodulation data; if the verification result is that both the current demodulation data and the voltage demodulation data are not verified, pairing and combining the current demodulation data and the voltage demodulation data byte by byte to obtain a plurality of recombined demodulation data; checking the plurality of recombined demodulated data; determining demodulation data passing the check in the plurality of recombined demodulation data as target demodulation data; and the format of each recombined demodulation data, the current demodulation data and the voltage demodulation data is a preset data packet format.

2. A wireless charging data demodulation method applied to the power transmitting terminal of claim 1, wherein the method comprises:

processing the current demodulation signal to obtain current demodulation data;

processing the voltage demodulation signal to obtain voltage demodulation data;

determining target demodulation data according to a verification result, the voltage demodulation data and the current demodulation data, wherein the target demodulation data are transmission data from a power supply receiving end in a wireless charging system;

wherein the determining target demodulation data according to the verification result, the voltage demodulation data and the current demodulation data comprises:

if the verification result is that both the current demodulation data and the voltage demodulation data are not verified, pairing and combining the current demodulation data and the voltage demodulation data byte by byte to obtain a plurality of recombined demodulation data, wherein the formats of each recombined demodulation data, the current demodulation data and the voltage demodulation data are preset data packet formats;

checking the plurality of recombined demodulated data;

3. The method of claim 2, wherein the separately verifying the current demodulation data and the voltage demodulation data comprises:

and if the first check and/or the second check are/is not passed, determining that the demodulation data check is not passed.

4. The method of claim 2, wherein the determining, according to the verification result, the voltage demodulation data and the current demodulation data, target demodulation data as transmission data from a power source receiving end in a wireless charging system comprises:

5. The method of claim 2, wherein the determining, according to the verification result, the voltage demodulation data and the current demodulation data, target demodulation data as transmission data from a power source receiving end in a wireless charging system comprises:

6. The method of claim 2, wherein said checking the plurality of reassembled demodulated data comprises:

performing first check according to the second header information length of each recombined demodulation data and the corresponding second actual information length;

7. A wireless charging data demodulation apparatus applied to the power transmitting terminal of claim 1, wherein the apparatus comprises:

the determining module is used for determining target demodulation data according to the checking result, the voltage demodulation data and the current demodulation data, wherein the target demodulation data are transmission data from a power supply receiving end in the wireless charging system;

the determining module is specifically configured to, if the verification result indicates that both the current demodulation data and the voltage demodulation data do not pass the verification, pair and combine the current demodulation data and the voltage demodulation data byte by byte to obtain a plurality of recombined demodulation data, where formats of each of the recombined demodulation data, the current demodulation data, and the voltage demodulation data are all preset data packet formats; checking the plurality of recombined demodulated data; and determining the demodulation data passing the check in the plurality of recombined demodulation data as the target demodulation data.

8. A control apparatus, characterized by comprising: a processor, a storage medium, the processor and the storage medium being connected by a bus communication, the storage medium storing program instructions executable by the processor, the processor calling the program instructions stored in the storage medium to execute the steps of the wireless charging data demodulation method according to any one of claims 2 to 6.

9. A storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the wireless charging data demodulation method according to any one of claims 2 to 6.