CN111371141B - Wireless charging method and system based on automatic identification technology - Google Patents
Wireless charging method and system based on automatic identification technology Download PDFInfo
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- CN111371141B CN111371141B CN202010196596.2A CN202010196596A CN111371141B CN 111371141 B CN111371141 B CN 111371141B CN 202010196596 A CN202010196596 A CN 202010196596A CN 111371141 B CN111371141 B CN 111371141B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/70—Circuit arrangements or systems for wireless supply or distribution of electric power involving the reduction of electric, magnetic or electromagnetic leakage fields
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/80—Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/90—Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention provides a wireless charging method and a wireless charging system based on an automatic identification technology, wherein the method comprises the following steps: automatically identifying and monitoring the battery state of a target battery, automatically identifying and monitoring the electromagnetic intensity of a charging coil of wireless charging equipment, and determining a chargeable area corresponding to the electromagnetic intensity; receiving feedback information of a target battery and wireless charging equipment in a charging process and a non-charging process; when the target battery needs to be charged wirelessly, the target battery is placed in a chargeable area, and the charging power of the wireless charging equipment is controlled to be switched in real time according to the battery state, the feedback information, the preset charging time and the energy standard, so that the target battery is charged intelligently. Based on the automatic identification technology, multi-dimensional intelligent calculation is carried out on the target battery, effective switching of charging power is achieved, and then loss of the target battery is reduced.
Description
Technical Field
The invention relates to the technical field of wireless charging, in particular to a wireless charging method and system based on an automatic identification technology.
Background
Along with the continuous improvement of consumer to power supply quality, security, reliability, convenience, instantaneity, special occasion, special geographical environment's etc. requirement for contact electric energy transmission mode more and more can not satisfy the actual need, wireless charger is the equipment that charges with the electromagnetic induction principle, and its principle is similar with the transformer, through respectively settling a coil at sending and receiving terminal, sending end coil sends electromagnetic signal to the external world under the effect of electric power, and receiving terminal coil receives electromagnetic signal and changes electromagnetic signal into electric current, thereby reaches the purpose of wireless charging.
The wireless charging technology is a special power supply mode, does not need a power line, depends on electromagnetic wave propagation, converts electromagnetic wave energy into electric energy, and finally realizes wireless charging. However, in the process of performing wireless charging, charging is generally performed according to a set power, but since a rechargeable battery has a plurality of factors affecting wireless charging during charging, and if the rechargeable battery is only subjected to one power, damage may be caused, the charging power is switched by comprehensively considering the plurality of factors of the rechargeable battery, so that damage to the rechargeable battery is reduced.
Disclosure of Invention
The invention provides a wireless charging method based on an automatic identification technology, which is used for carrying out multi-dimensional intelligent calculation on a target battery based on the automatic identification technology, realizing effective switching of charging power and further reducing the loss of the target battery.
The embodiment of the invention provides a wireless charging method based on an automatic identification technology, which comprises the following steps:
automatically identifying and monitoring a battery state of a target battery, the battery state comprising: the current residual capacity, the current battery temperature, the current charging state, the charging speed of the target battery and the distance from a charging source point in a chargeable area;
automatically identifying and monitoring the electromagnetic intensity of a charging coil of the wireless charging equipment, and determining a chargeable area corresponding to the electromagnetic intensity;
receiving feedback information of the target battery and the wireless charging equipment in the charging process and the non-charging process;
when the target battery needs to be charged wirelessly, the target battery is placed in the chargeable area, and the charging power of the wireless charging equipment is controlled to be switched in real time according to the battery state, the feedback information, the preset charging time and the energy standard, so that the target battery is charged intelligently.
In one possible implementation manner, before the target battery is wirelessly charged, the method further includes:
determining whether the charging rights of the target battery and the wireless charging device are matched;
if the target battery is matched with the target battery, verifying whether the registration certificate of the target battery is safe, and if so, charging the target battery;
otherwise, the target battery is not charged.
In a possible implementation manner, in the determining the chargeable area corresponding to the electromagnetic intensity, the method further includes:
carrying out simulation design on electromagnetic ranges with different electromagnetic strengths;
judging the coil characteristics of the target coil corresponding to the electromagnetic intensity, and correcting the electromagnetic range to obtain a final electromagnetic range;
preprocessing the final electromagnetic ranges of all target coils in the wireless charging equipment to obtain chargeable areas corresponding to different combined coils;
and meanwhile, updating the electromagnetic range in real time according to the electromagnetic change of the electromagnetic intensity.
In one possible implementation manner, the wireless charging device further includes, during charging of the target battery, a step of:
determining first positions of all target coils in the wireless charging equipment and first directions corresponding to the first positions to form a first charging set;
obtaining a second charging set based on the first charging set and according to a second position and a second direction of the target battery in the chargeable area;
checking whether each target coil in the second charging set can work normally or not, eliminating the target coils which cannot work normally, reserving the remaining target coils, and forming a third charging set;
and determining the relevance of the target battery and each target coil in the third charging set, and respectively controlling the corresponding target coil to transmit corresponding charging power according to the relevance from high to low.
In a possible implementation manner, during the wireless charging, the wireless charging device further includes:
monitoring the jumping information of a first current and a first voltage flowing through the target coil in real time;
monitoring control data of a second current and a second voltage flowing through a control circuit connected with the target coil in real time;
determining a matching value of the jitter information and the control data, and if the matching value is smaller than a first preset value, acquiring a noise parameter in the control data according to the jitter information;
and based on a preset noise elimination standard, carrying out noise elimination processing on the control circuit corresponding to the noise parameter, and verifying the control circuit after the noise elimination processing until the obtained matching value of the corresponding jitter information and the control data is greater than or equal to a first preset value.
In one possible implementation manner, the receiving feedback information of the target battery and the wireless charging device during the charging process and the non-charging process includes:
when the target battery is in communication connection with the wireless charging equipment, judging whether the temperature value of the current battery of the target battery which is automatically identified and monitored is larger than a second preset value or not, and if so, adjusting the charging power of the target battery;
meanwhile, determining a heat generating part of the target battery based on a temperature database;
carrying out laser inspection on the target battery to obtain a temperature energy diagram;
calling a corresponding cooling mode from a pre-stored cooling rule database according to the determined heat-generating part and the obtained temperature energy diagram to realize the cooling of the target battery;
when the temperature value is larger than a second preset value, collecting corresponding temperature energy, storing the temperature energy, and performing feedback processing on the target battery according to the stored temperature energy;
when the target battery is in communication connection with the wireless charging equipment, automatically identifying and monitoring whether the transmitting power of the wireless charging equipment is consistent with the charging power received by the target battery;
if the target state of the target battery is inconsistent with the electromagnetic leakage of the wireless charging equipment, judging whether the electromagnetic leakage exists in the wireless charging equipment or not by determining the target state of the target battery, and if the electromagnetic leakage exists, sending a first alarm instruction to a monitoring end;
otherwise, judging whether the target battery has an abnormal condition or not by determining the equipment state of the wireless charging equipment, and if so, sending a second alarm instruction to the user side corresponding to the target battery.
In a possible implementation manner, in a process of controlling the charging power of the wireless charging device to switch in real time, in order to ensure accuracy of obtaining the charging power and further ensure high efficiency of implementing the switching, the method further includes: a safety protection circuit;
the safety protection circuit includes: a transformer M, a first switch K1, a second switch K2, a third switch K3, a fourth switch K4, a fifth switch K4, a sixth switch K4, a seventh switch K4, an eighth switch K4, a first capacitor C4, a second capacitor C4, a third capacitor C4, a fourth capacitor C4, a fifth capacitor C4, a sixth capacitor C4, a seventh capacitor C4, an eighth capacitor C4, a first resistor R4, a second resistor R4, a third resistor R4, a fourth resistor R4, a fifth resistor R4, a sixth resistor R4, a seventh resistor R4, an eighth resistor R4, a ninth resistor R4, a microcontroller U4, an operational amplifier U4, a first diode L4, a second diode L4, a third diode L4, a first VCC N4, a second NPN transistor 4, and a power supply transistor GND;
the wireless transmitting unit in the wireless charging device is connected with the input end of the control unit, and the output end of the controller is respectively connected with one end of the first switch K1, the anode of the first diode L1, one end of the third resistor R3, one end of the eighth capacitor C8, one end of the fourth resistor R4 and one end of the fifth switch K5;
the other end of the first switch K1 is connected with one end of a first resistor R1, and the other end of the first resistor R1 is connected with the other end of a second resistor R2 and one end of a fourth switch K4;
the cathode of the first diode L1 is connected with one end of a second resistor R2;
the other end of the fourth switch K4 and the other end of the fifth switch K5 are connected with the positive input end of an operational amplifier U1;
the inverting input end of the operational amplifier U1 is connected with one end of a sixth switch K6;
the other end of the sixth switch K6 is connected with one end of a first capacitor C1 and one end of a fifth resistor R5;
the other end of the fifth resistor R5 is connected with one end of a second capacitor C2;
the other end of the first capacitor C1, the other end of the second capacitor C2, the other end of the third resistor R3, the other end of the eighth capacitor C8 and the other end of the fourth resistor R4 are connected with the ground GND;
the output end of the operational amplifier U1 is connected with one end of a third capacitor C3, one end of a third switch K3, one end of a fourth capacitor C4, one end of a seventh switch K7 and one end of a microcontroller U2;
the other end of the third capacitor C3 is connected with one end of a second switch K2;
the other end of the second switch K2 is connected with the other end of the third switch K3;
the other end of the fourth capacitor C4 is connected with one end of an eighth switch K8;
the other end of the eighth switch K8 is connected with the other end of the seventh switch K7;
a first output end of the microcontroller U2 is connected with a base electrode of a first NPN transistor, and a second output end of the microcontroller U2 is connected with a base electrode of a second NPN transistor;
the collector of the first NPN transistor is connected with a power supply VCC and the anode of a second diode L2;
the emitter of the first NPN transistor is connected with the input end of the primary coil of the transformer M, and the output end of the primary coil is connected with the collector of a second NPN transistor N2;
the cathode of the second diode L2 is connected with one end of a fifth capacitor C5;
the other end of the fifth capacitor C5 is connected with the cathode of the third diode L3 and the first input end of the communication unit;
the input end of the secondary coil of the transformer M is connected with the anode of a third diode L3;
the output end of the secondary coil is connected with one end of a seventh resistor R7 and one end of a sixth capacitor C6, the other end of the sixth capacitor C6 is connected with one end of a sixth resistor R6, and the other end of the sixth resistor R6 is connected with the second input end of the communication unit;
an emitter of the second NPN transistor N2 is connected to one end of the seventh capacitor C7 and one end of the eighth resistor R8, and the other end of the seventh resistor R7 is connected to one end of the ninth resistor R9;
the other end of the seventh capacitor C7, the other end of the eighth resistor R8, and the other end of the ninth resistor R9 are connected to ground GND.
In a possible implementation manner, in the process of controlling the charging power of the wireless charging device to switch in real time according to the battery state, the feedback information, the preset charging time, and the energy standard, the method further includes:
step A1: determining an electromagnetic emission efficiency η of the wireless charging device1And a charging efficiency η of the target battery2；
Step A2: performing priority ranking on the n indexes in the battery state, and performing combined calculation with the feedback information m one by one according to a ranking result from high to low;
wherein S isiThe combination calculation value of the ith index and the feedback information m in the sequencing result n from high to low is represented; p represents an average feedback factor based on n indices; p is a radical ofiA feedback factor representing an i-th index; f (Delta)i) An adjustment parameter representing an adjustment factor Δ of the i-th index; k is a radical ofiA normalized index value representing an ith index; k is a radical ofi maxA maximum index value representing an ith index; k is a radical ofiminA minimum index value representing an ith index; e represents a natural constant;
based on electromagnetic emission efficiency eta1And charging efficiency η2Comprehensively calculating all combined calculation results, and obtaining the maximum charging power P of the target battery according to the comprehensive calculation result W101According toIntegrating the calculation result W2 to obtain the minimum charging power P of the target battery02；
Si-1The combined calculation value of the i-1 index and the feedback information m in the sequencing result n from high to low is represented;
the average combination calculation value of n indexes and the feedback information m according to the sequencing result from high to low is represented; s1The combination of the first index in the sequencing result n and the feedback information m is calculated according to the representation; snThe combined calculation value of the last index in the sequencing result n and the feedback information m is represented from high to low;
step A3: determining a loss grade Z of the target battery according to the battery state and the maximum and minimum charging power of the target battery monitored in real time, and determining the current optimal charging power of the target battery according to the loss grade Z;
wherein, s'iThe battery state value of the target battery corresponding to the ith index in the n indexes is represented;
step A4: and C, switching the charging power of the wireless charging equipment in real time according to the optimal charging power obtained in the step A3 and based on preset charging time and energy standards.
The embodiment of the invention provides a wireless charging system based on an automatic identification technology, which comprises:
the first monitoring module is used for automatically identifying and monitoring the battery state of a target battery, and the battery state comprises: the current residual capacity, the current battery temperature, the current charging state, the charging speed of the target battery and the distance from a charging source point in a chargeable area;
the second monitoring module is used for automatically identifying and monitoring the electromagnetic intensity of a charging coil of the wireless charging equipment and determining a chargeable area corresponding to the electromagnetic intensity;
the receiving module is used for receiving feedback information of the target battery and the wireless charging equipment in the charging process and the non-charging process;
the control module is used for placing the target battery in the chargeable area when the target battery needs to be charged wirelessly, and controlling the charging power of the wireless charging equipment to be switched in real time according to the battery state automatically identified and monitored by the first monitoring module, the feedback information received by the receiving module, the preset charging time and the energy standard, so that the target battery is charged intelligently.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a flowchart of a wireless charging method based on an automatic identification technology according to an embodiment of the present invention;
FIG. 2 is a circuit diagram of a safety protection circuit according to an embodiment of the present invention;
fig. 3 is a block diagram of a wireless charging system based on automatic identification technology according to an embodiment of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
The embodiment of the invention provides a wireless charging method based on an automatic identification technology, as shown in fig. 1, comprising the following steps:
step 1: automatically identifying and monitoring a battery state of a target battery, the battery state comprising: the current residual capacity, the current battery temperature, the current charging state, the charging speed of the target battery and the distance from a charging source point in a chargeable area;
step 2: automatically identifying and monitoring the electromagnetic intensity of a charging coil of the wireless charging equipment, and determining a chargeable area corresponding to the electromagnetic intensity;
and step 3: receiving feedback information of the target battery and the wireless charging equipment in the charging process and the non-charging process;
and 4, step 4: when the target battery needs to be charged wirelessly, the target battery is placed in the chargeable area, and the charging power of the wireless charging equipment is controlled to be switched in real time according to the battery state, the feedback information, the preset charging time and the energy standard, so that the target battery is charged intelligently.
The charging source point refers to an electromagnetic coil in the wireless charging device;
the electromagnetic intensity is different, the corresponding chargeable areas are different, and because the electromagnetic intensity has slight electromagnetic floating, the chargeable areas can be regarded as the chargeable areas corresponding to the minimum electromagnetic intensity under the same voltage and current;
receiving feedback information of the target battery and the wireless charging device in the charging process and the non-charging process, for example, the feedback information in the non-charging process, wherein the target battery is not currently charged; the wireless charging equipment stops working; feedback information in the charging process, consumption efficiency of the target battery on the wireless electromagnetic waves during current wireless charging; the transmission efficiency of the wireless charging device to transmit wireless electromagnetic waves, and the like;
the preset charging time and energy standard are established according to the rated charging time of the wireless charging device, the rated transmission energy in the rated charging time and the like.
The above technical solution mainly refers to a charging situation of the same wireless charging device for one or more target batteries, for example: when the charging condition of a target battery corresponding to the same wireless charging device is determined according to the battery state, feedback information, preset charging time and energy standards of the target battery, when the target battery is in different temperatures, different residual electricity states and different electric quantities, the charging power of the target battery is determined according to different charging speeds corresponding to the different electric quantities, different distances from charging source points in a chargeable area and other multidimensional factors, and the charging power is controlled to be switched at any time along with the change of the multidimensional factors, so that the charging battery is protected, and the service life of the charging battery is prolonged.
The beneficial effects of the above technical scheme are: based on the automatic identification technology, multi-dimensional intelligent calculation is carried out on the target battery, effective switching of charging power is achieved, and then loss of the target battery is reduced.
The embodiment of the invention provides a wireless charging method based on an automatic identification technology, which comprises the following steps before the target battery is wirelessly charged:
determining whether the charging rights of the target battery and the wireless charging device are matched;
if the target battery is matched with the target battery, verifying whether the registration certificate of the target battery is safe, and if so, charging the target battery;
otherwise, the target battery is not charged.
The beneficial effects of the above technical scheme are: the communication connection between the target battery and the wireless charging equipment is facilitated by matching the charging permission, and the verification of the security of the registration certificate is to ensure that the target battery can be normally and wirelessly charged and provide guarantee premise for subsequent multidimensional analysis.
The embodiment of the invention provides a wireless charging method based on an automatic identification technology, and in the process of determining a chargeable area corresponding to the electromagnetic intensity, the method further comprises the following steps:
carrying out simulation design on electromagnetic ranges with different electromagnetic strengths;
judging the coil characteristics of the target coil corresponding to the electromagnetic intensity, and correcting the electromagnetic range to obtain a final electromagnetic range;
preprocessing the final electromagnetic ranges of all target coils in the wireless charging equipment to obtain chargeable areas corresponding to different combined coils;
and meanwhile, updating the electromagnetic range in real time according to the electromagnetic change of the electromagnetic intensity.
The coil characteristics described above include, for example: magnetic sheet size, coil loss, etc.;
the correction processing is carried out to avoid electromagnetic attenuation caused by the service life process of the coil, but certain errors are caused in the simulation electromagnetic range because the factor is not considered;
at least one target coil exists in a wireless charging device, and different combinations of coils have different electromagnetic ranges, and the preprocessing is generally performed to combine different coils.
The beneficial effects of the above technical scheme are: the accuracy of the simulation electromagnetic range is improved by correction processing, the possibility of different chargeable areas provided by different coil combinations is increased by preprocessing, and reference values are provided for multidimensional calculation by real-time updating.
The embodiment of the invention provides a wireless charging method based on an automatic identification technology, wherein in the process of charging a target battery, the wireless charging equipment further comprises the following steps:
determining first positions of all target coils in the wireless charging equipment and first directions corresponding to the first positions to form a first charging set;
obtaining a second charging set based on the first charging set and according to a second position and a second direction of the target battery in the chargeable area;
checking whether each target coil in the second charging set can work normally or not, eliminating the target coils which cannot work normally, reserving the remaining target coils, and forming a third charging set;
and determining the relevance of the target battery and each target coil in the third charging set, and respectively controlling the corresponding target coil to transmit corresponding charging power according to the relevance from high to low.
The first position and the first direction may be based on all positions and all directions in the wireless charging device; the target coils at each position have the corresponding directions;
for example, when the target battery is in a south orientation based on the wireless charging device, and the target coil located in the south orientation constitutes a second charging set;
whether the target coils in the south direction can normally work is checked, the target coils which cannot normally work in the south direction are removed, and the remaining target coils can form a third charging set;
the association between the target battery and the target coil in the third charging set may be determined, for example, according to the distance between the target battery and each target coil in the third charging set and/or the operating efficiency of each target coil in the third charging set, and if the association is determined with the distance, the target coil near the target battery is regarded as having a large association, the target coil far from the target battery is regarded as having a small association, and the transmission power of the target coil near the target battery may be controlled to be large and the transmission power of the target coil far from the target battery may be controlled to be small.
The beneficial effects of the above technical scheme are: the first charging set is reconstructed twice, the target coils which cannot normally work are effectively removed, the reserved target coils are qualified, and through the determination of the relevance, the transmitting power of the target coils is effectively controlled, so that the working efficiency of the target coils is improved.
The embodiment of the invention provides a wireless charging method based on an automatic identification technology, wherein the wireless charging equipment further comprises the following steps in the process of wireless charging:
monitoring the jumping information of a first current and a first voltage flowing through the target coil in real time;
monitoring control data of a second current and a second voltage flowing through a control circuit connected with the target coil in real time;
determining a matching value of the jitter information and the control data, and if the matching value is smaller than a first preset value, acquiring a noise parameter in the control data according to the jitter information;
and based on a preset noise elimination standard, carrying out noise elimination processing on the control circuit corresponding to the noise parameter, and verifying the control circuit after the noise elimination processing until the obtained matching value of the corresponding jitter information and the control data is greater than or equal to a first preset value.
The jitter data may be the variation of current and voltage flowing through the target coil in a certain time period, and the control data is based on the variation of current and voltage flowing through the control circuit in a time period corresponding to the time period of obtaining the jitter data after a certain delay, wherein the certain delay is generally between 1us and 100us, and is a matching value matching the corresponding current and voltage, and the first preset value is 90% or more;
the noise parameter may be noise caused by current or voltage.
The beneficial effects of the above technical scheme are: through matching the judgement to voltage, electric current in target coil and the control circuit respectively, be convenient for acquire the noise parameter, and then through the noise elimination standard, be convenient for cause the elimination processing to its control circuit that causes that produces, effectual reduction causes the interference to charging power, provides effective basis for charging power's accurate switching, through verifying, is in order to guarantee that it causes the elimination to succeed.
The embodiment of the invention provides a wireless charging method based on an automatic identification technology, which comprises the following steps of receiving feedback information of a target battery and wireless charging equipment in the charging process and the non-charging process:
when the target battery is in communication connection with the wireless charging equipment, judging whether the temperature value of the current battery of the target battery which is automatically identified and monitored is larger than a second preset value or not, and if so, adjusting the charging power of the target battery;
meanwhile, determining a heat generating part of the target battery based on a temperature database;
carrying out laser inspection on the target battery to obtain a temperature energy diagram;
calling a corresponding cooling mode from a pre-stored cooling rule database according to the determined heat-generating part and the obtained temperature energy diagram to realize the cooling of the target battery;
when the temperature value is larger than a second preset value, collecting corresponding temperature energy, storing the temperature energy, and performing feedback processing on the target battery according to the stored temperature energy;
when the target battery is in communication connection with the wireless charging equipment, automatically identifying and monitoring whether the transmitting power of the wireless charging equipment is consistent with the charging power received by the target battery;
if the target state of the target battery is inconsistent with the electromagnetic leakage of the wireless charging equipment, judging whether the electromagnetic leakage exists in the wireless charging equipment or not by determining the target state of the target battery, and if the electromagnetic leakage exists, sending a first alarm instruction to a monitoring end;
otherwise, judging whether the target battery has an abnormal condition or not by determining the equipment state of the wireless charging equipment, and if so, sending a second alarm instruction to the user side corresponding to the target battery.
The charging power of the battery is adjusted by determining the temperature value of the battery, for example, when the temperature value is too high, the charging power is adjusted to be low, and the like;
through the combined analysis of the heat-generating part and the energy diagram, the specific heat-generating part and the heat-generating energy of the rechargeable battery can be determined conveniently, and a reasonable cooling mode can be selected conveniently to cool the rechargeable battery, for example, the intensity of cold air blown by a fan is controlled to cool the heat-generating part;
the corresponding temperature energy is collected and stored, so that the temperature energy is fed back and used as a factor for switching the charging power, and the use efficiency of the charging power is improved and the heat waste is avoided for recycling the charging power.
The first alarm instruction may be: electromagnetic leakage exists in the wireless charging equipment;
the second alarm instruction may be: the target battery has abnormal conditions, such as incapability of charging and charging efficiency lower than 5% and below;
the user terminal may be a smart phone or a tablet having a target battery.
The beneficial effects of the above technical scheme are: through the combined analysis of the heat-generating part and the energy diagram, the specific heat-generating part and the heat-generating energy of the rechargeable battery can be determined conveniently, and a reasonable cooling mode can be selected conveniently to cool the rechargeable battery; by sending the alarm instruction, the system is convenient for respective reminding with pertinence.
The embodiment of the invention provides a wireless charging method based on an automatic identification technology, which is used for controlling the charging power of wireless charging equipment to be switched in real time, and further comprises the following steps in order to ensure the accuracy of charging power acquisition and the high efficiency of switching implementation: a safety protection circuit;
as shown in fig. 2, the safety protection circuit includes: a transformer M, a first switch K1, a second switch K2, a third switch K3, a fourth switch K4, a fifth switch K4, a sixth switch K4, a seventh switch K4, an eighth switch K4, a first capacitor C4, a second capacitor C4, a third capacitor C4, a fourth capacitor C4, a fifth capacitor C4, a sixth capacitor C4, a seventh capacitor C4, an eighth capacitor C4, a first resistor R4, a second resistor R4, a third resistor R4, a fourth resistor R4, a fifth resistor R4, a sixth resistor R4, a seventh resistor R4, an eighth resistor R4, a ninth resistor R4, a microcontroller U4, an operational amplifier U4, a first diode L4, a second diode L4, a third diode L4, a first VCC N4, a second NPN transistor 4, and a power supply transistor GND;
the wireless transmitting unit in the wireless charging device is connected with the input end of the control unit, and the output end of the controller is respectively connected with one end of the first switch K1, the anode of the first diode L1, one end of the third resistor R3, one end of the eighth capacitor C8, one end of the fourth resistor R4 and one end of the fifth switch K5;
the other end of the first switch K1 is connected with one end of a first resistor R1, and the other end of the first resistor R1 is connected with the other end of a second resistor R2 and one end of a fourth switch K4;
the cathode of the first diode L1 is connected with one end of a second resistor R2;
the other end of the fourth switch K4 and the other end of the fifth switch K5 are connected with the positive input end of an operational amplifier U1;
the inverting input end of the operational amplifier U1 is connected with one end of a sixth switch K6;
the other end of the sixth switch K6 is connected with one end of a first capacitor C1 and one end of a fifth resistor R5;
the other end of the fifth resistor R5 is connected with one end of a second capacitor C2;
the other end of the first capacitor C1, the other end of the second capacitor C2, the other end of the third resistor R3, the other end of the eighth capacitor C8 and the other end of the fourth resistor R4 are connected with the ground GND;
the output end of the operational amplifier U1 is connected with one end of a third capacitor C3, one end of a third switch K3, one end of a fourth capacitor C4, one end of a seventh switch K7 and one end of a microcontroller U2;
the other end of the third capacitor C3 is connected with one end of a second switch K2;
the other end of the second switch K2 is connected with the other end of the third switch K3;
the other end of the fourth capacitor C4 is connected with one end of an eighth switch K8;
the other end of the eighth switch K8 is connected with the other end of the seventh switch K7;
a first output end of the microcontroller U2 is connected with a base electrode of a first NPN transistor, and a second output end of the microcontroller U2 is connected with a base electrode of a second NPN transistor;
the collector of the first NPN transistor is connected with a power supply VCC and the anode of a second diode L2;
the emitter of the first NPN transistor is connected with the input end of the primary coil of the transformer M, and the output end of the primary coil is connected with the collector of a second NPN transistor N2;
the cathode of the second diode L2 is connected with one end of a fifth capacitor C5;
the other end of the fifth capacitor C5 is connected with the cathode of the third diode L3 and the first input end of the communication unit;
the input end of the secondary coil of the transformer M is connected with the anode of a third diode L3;
the output end of the secondary coil is connected with one end of a seventh resistor R7 and one end of a sixth capacitor C6, the other end of the sixth capacitor C6 is connected with one end of a sixth resistor R6, and the other end of the sixth resistor R6 is connected with the second input end of the communication unit;
an emitter of the second NPN transistor N2 is connected to one end of the seventh capacitor C7 and one end of the eighth resistor R8, and the other end of the seventh resistor R7 is connected to one end of the ninth resistor R9;
the other end of the seventh capacitor C7, the other end of the eighth resistor R8, and the other end of the ninth resistor R9 are connected to ground GND.
The beneficial effects of the above technical scheme are: through setting up the switch of a plurality of difference, can select effectual branch road in order to carry out the in-process of protecting to wireless battery charging outfit and protect, improve its high-efficient usability, be in order to guarantee the accuracy that charging power acquireed through setting up the safety protection circuit, and then guarantee to implement the high efficiency of switching, through setting up different electric capacity and resistance, be for the in-process of working at the safety protection circuit in order to make things convenient for, shunt or the partial pressure is carried out to electric current or voltage, further improve its guard action, provide the safety foundation for carrying out charging power's switching.
The embodiment of the invention provides a wireless charging method based on an automatic identification technology, which is used for controlling the charging power of wireless charging equipment to switch in real time according to the battery state, the feedback information, the preset charging time and the energy standard, and further comprises the following steps:
step A1: determining an electromagnetic emission efficiency η of the wireless charging device1And a charging efficiency η of the target battery2；
Step A2: performing priority ranking on the n indexes in the battery state, and performing combined calculation with the feedback information m one by one according to a ranking result from high to low;
wherein S isiThe combination calculation value of the ith index and the feedback information m in the sequencing result n from high to low is represented; p represents an average feedback factor based on n indices; p is a radical ofiA feedback factor representing an i-th index; f (Delta)i) An adjustment parameter representing an adjustment factor Δ of the i-th index; k is a radical ofiA normalized index value representing an ith index; k is a radical ofi maxA maximum index value representing an ith index; k is a radical ofiminA minimum index value representing an ith index; e represents a natural constant;
based on electromagnetic emission efficiency eta1And charging efficiency η2Comprehensively calculating all combined calculation results, and obtaining the maximum charging power P of the target battery according to the comprehensive calculation result W101Obtaining the minimum charging power P of the target battery according to the comprehensive calculation result W202；
Si-1The combined calculation value of the i-1 index and the feedback information m in the sequencing result n from high to low is represented;
the average combination calculation value of n indexes and the feedback information m according to the sequencing result from high to low is represented; s1The combination of the first index in the sequencing result n and the feedback information m is calculated according to the representation; snThe combined calculation value of the last index in the sequencing result n and the feedback information m is represented from high to low;
step A3: determining a loss grade Z of the target battery according to the battery state and the maximum and minimum charging power of the target battery monitored in real time, and determining the current optimal charging power of the target battery according to the loss grade Z;
wherein, s'iThe battery state value of the target battery corresponding to the ith index in the n indexes is represented;
step A4: and C, switching the charging power of the wireless charging equipment in real time according to the optimal charging power obtained in the step A3 and based on preset charging time and energy standards.
The n indexes may be 5 indexes of a current remaining power amount, a current battery temperature, a current charging state, a charging speed of the target battery, and a distance from a charging source point in a chargeable area;
the sorting result of the 5 indexes may be a distance between a current battery temperature > a current charging state > a current remaining capacity > a charging speed of the target battery > and a charging source point in the chargeable area.
Thus, the corresponding combination calculation may be 5 combination calculations.
The technical proposal is thatHas the advantages that: different combination results are determined by respectively carrying out combination calculation with the feedback information m one by one, and then the electromagnetic emission efficiency eta is based on1And charging efficiency η2The method comprises the steps of calculating all combined calculation results comprehensively, determining the maximum charging power and the minimum charging power conveniently, further effectively determining the power range of a target battery, determining the loss grade effectively according to the battery state and the maximum and minimum power, further determining the optimal charging power conveniently, and finally achieving intelligent switching of the charging power of the target battery.
An embodiment of the present invention provides a wireless charging system based on an automatic identification technology, as shown in fig. 3, including:
the first monitoring module is used for automatically identifying and monitoring the battery state of a target battery, and the battery state comprises: the current residual capacity, the current battery temperature, the current charging state, the charging speed of the target battery and the distance from a charging source point in a chargeable area;
the second monitoring module is used for automatically identifying and monitoring the electromagnetic intensity of a charging coil of the wireless charging equipment and determining a chargeable area corresponding to the electromagnetic intensity;
the receiving module is used for receiving feedback information of the target battery and the wireless charging equipment in the charging process and the non-charging process;
the control module is used for placing the target battery in the chargeable area when the target battery needs to be charged wirelessly, and controlling the charging power of the wireless charging equipment to be switched in real time according to the battery state automatically identified and monitored by the first monitoring module, the feedback information received by the receiving module, the preset charging time and the energy standard, so that the target battery is charged intelligently.
The beneficial effects of the above technical scheme are: based on the automatic identification technology, multi-dimensional intelligent calculation is carried out on the target battery, effective switching of charging power is achieved, and then loss of the target battery is reduced.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (8)
1. A wireless charging method based on automatic identification technology is characterized by comprising the following steps:
automatically identifying and monitoring a battery state of a target battery, the battery state comprising: the current residual capacity, the current battery temperature, the current charging state, the charging speed of the target battery and the distance from a charging source point in a chargeable area;
automatically identifying and monitoring the electromagnetic intensity of a charging coil of wireless charging equipment, and determining a chargeable area corresponding to the electromagnetic intensity;
receiving feedback information of the target battery and the wireless charging equipment in the charging process and the non-charging process;
when the target battery needs to be charged wirelessly, the target battery is placed in the chargeable area, and the charging power of the wireless charging equipment is controlled to be switched in real time according to the battery state, the feedback information, the preset charging time and the energy standard, so that the target battery is charged intelligently;
control the in-process that wireless charging equipment's charging power switched in real time, in order to guarantee the accuracy that charging power obtained, and then the in-process of the high efficiency of guaranteeing to implement the switching still includes: a safety protection circuit;
the safety protection circuit includes: a transformer M, a first switch K1, a second switch K2, a third switch K3, a fourth switch K4, a fifth switch K4, a sixth switch K4, a seventh switch K4, an eighth switch K4, a first capacitor C4, a second capacitor C4, a third capacitor C4, a fourth capacitor C4, a fifth capacitor C4, a sixth capacitor C4, a seventh capacitor C4, an eighth capacitor C4, a first resistor R4, a second resistor R4, a third resistor R4, a fourth resistor R4, a fifth resistor R4, a sixth resistor R4, a seventh resistor R4, an eighth resistor R4, a ninth resistor R4, a microcontroller U4, an operational amplifier U4, a first diode L4, a second diode L4, a third diode L4, a first VCC N4, a second NPN transistor 4, and a power supply transistor GND;
the wireless transmitting unit in the wireless charging device is connected with the input end of the control unit, and the output end of the controller is respectively connected with one end of the first switch K1, the anode of the first diode L1, one end of the third resistor R3, one end of the eighth capacitor C8, one end of the fourth resistor R4 and one end of the fifth switch K5;
the other end of the first switch K1 is connected with one end of a first resistor R1, and the other end of the first resistor R1 is connected with the other end of a second resistor R2 and one end of a fourth switch K4;
the cathode of the first diode L1 is connected with one end of a second resistor R2;
the other end of the fourth switch K4 and the other end of the fifth switch K5 are connected with the positive input end of an operational amplifier U1;
the inverting input end of the operational amplifier U1 is connected with one end of a sixth switch K6;
the other end of the sixth switch K6 is connected with one end of a first capacitor C1 and one end of a fifth resistor R5;
the other end of the fifth resistor R5 is connected with one end of a second capacitor C2;
the other end of the first capacitor C1, the other end of the second capacitor C2, the other end of the third resistor R3, the other end of the eighth capacitor C8 and the other end of the fourth resistor R4 are connected with the ground GND;
the output end of the operational amplifier U1 is connected with one end of a third capacitor C3, one end of a third switch K3, one end of a fourth capacitor C4, one end of a seventh switch K7 and one end of a microcontroller U2;
the other end of the third capacitor C3 is connected with one end of a second switch K2;
the other end of the second switch K2 is connected with the other end of the third switch K3;
the other end of the fourth capacitor C4 is connected with one end of an eighth switch K8;
the other end of the eighth switch K8 is connected with the other end of the seventh switch K7;
a first output end of the microcontroller U2 is connected with a base electrode of a first NPN transistor, and a second output end of the microcontroller U2 is connected with a base electrode of a second NPN transistor;
the collector of the first NPN transistor is connected with a power supply VCC and the anode of a second diode L2;
the emitter of the first NPN transistor is connected with the input end of the primary coil of the transformer M, and the output end of the primary coil is connected with the collector of a second NPN transistor N2;
the cathode of the second diode L2 is connected with one end of a fifth capacitor C5;
the other end of the fifth capacitor C5 is connected with the cathode of the third diode L3 and the first input end of the communication unit;
the input end of the secondary coil of the transformer M is connected with the anode of a third diode L3;
the output end of the secondary coil is connected with one end of a seventh resistor R7 and one end of a sixth capacitor C6, the other end of the sixth capacitor C6 is connected with one end of a sixth resistor R6, and the other end of the sixth resistor R6 is connected with the second input end of the communication unit;
an emitter of the second NPN transistor N2 is connected to one end of the seventh capacitor C7 and one end of the eighth resistor R8, and the other end of the seventh resistor R7 is connected to one end of the ninth resistor R9;
the other end of the seventh capacitor C7, the other end of the eighth resistor R8, and the other end of the ninth resistor R9 are connected to ground GND.
2. The wireless charging method of claim 1, further comprising, prior to wirelessly charging the target battery:
determining whether the charging rights of the target battery and the wireless charging device are matched;
if the target battery is matched with the target battery, verifying whether the registration certificate of the target battery is safe, and if so, charging the target battery;
otherwise, the target battery is not charged.
3. The wireless charging method according to claim 1, wherein the determining of the chargeable area corresponding to the electromagnetic intensity further comprises:
carrying out simulation design on electromagnetic ranges with different electromagnetic strengths;
judging the coil characteristics of the target coil corresponding to the electromagnetic intensity, and correcting the electromagnetic range to obtain a final electromagnetic range;
preprocessing the final electromagnetic ranges of all target coils in the wireless charging equipment to obtain chargeable areas corresponding to different combined coils;
and meanwhile, updating the electromagnetic range in real time according to the electromagnetic change of the electromagnetic intensity.
4. The wireless charging method of claim 3, wherein the wireless charging device, in charging the target battery, further comprises:
determining first positions of all target coils in the wireless charging equipment and first directions corresponding to the first positions to form a first charging set;
obtaining a second charging set based on the first charging set and according to a second position and a second direction of the target battery in the chargeable area;
checking whether each target coil in the second charging set can work normally or not, eliminating the target coils which cannot work normally, reserving the remaining target coils, and forming a third charging set;
and determining the relevance of the target battery and each target coil in the third charging set, and respectively controlling the corresponding target coil to transmit corresponding charging power according to the relevance from high to low.
5. The wireless charging method of claim 3, wherein the wireless charging device, in performing the wireless charging process, further comprises:
monitoring the jumping information of a first current and a first voltage flowing through the target coil in real time;
monitoring control data of a second current and a second voltage flowing through a control circuit connected with the target coil in real time;
determining a matching value of the jitter information and the control data, and if the matching value is smaller than a first preset value, acquiring a noise parameter in the control data according to the jitter information;
and based on a preset noise elimination standard, carrying out noise elimination processing on the control circuit corresponding to the noise parameter, and verifying the control circuit after the noise elimination processing until the obtained matching value of the corresponding jitter information and the control data is greater than or equal to a first preset value.
6. The wireless charging method of claim 1, wherein receiving feedback information of the target battery and the wireless charging device during charging and during non-charging comprises:
when the target battery is in communication connection with the wireless charging equipment, judging whether the temperature value of the current battery of the target battery which is automatically identified and monitored is larger than a second preset value or not, and if so, adjusting the charging power of the target battery;
meanwhile, determining a heat generating part of the target battery based on a temperature database;
carrying out laser inspection on the target battery to obtain a temperature energy diagram;
calling a corresponding cooling mode from a pre-stored cooling rule database according to the determined heat-generating part and the obtained temperature energy diagram to realize the cooling of the target battery;
when the temperature value is larger than a second preset value, collecting corresponding temperature energy, storing the temperature energy, and performing feedback processing on the target battery according to the stored temperature energy;
when the target battery is in communication connection with the wireless charging equipment, automatically identifying and monitoring whether the transmitting power of the wireless charging equipment is consistent with the charging power received by the target battery;
if the target state of the target battery is inconsistent with the electromagnetic leakage of the wireless charging equipment, judging whether the electromagnetic leakage exists in the wireless charging equipment or not by determining the target state of the target battery, and if the electromagnetic leakage exists, sending a first alarm instruction to a monitoring end;
otherwise, judging whether the target battery has an abnormal condition or not by determining the equipment state of the wireless charging equipment, and if so, sending a second alarm instruction to the user side corresponding to the target battery.
7. The wireless charging method of claim 1, wherein in the process of controlling the charging power of the wireless charging device to switch in real time according to the battery status, the feedback information, the preset charging time and the energy standard, the method further comprises:
step A1: determining an electromagnetic emission efficiency η of the wireless charging device1And a charging efficiency η of the target battery2；
Step A2: performing priority ranking on the n indexes in the battery state, and performing combined calculation with the feedback information m one by one according to a ranking result from high to low;
wherein S isiThe combination calculation value of the ith index and the feedback information m in the sequencing result n from high to low is represented; p represents an average feedback factor based on n indices; p is a radical ofiA feedback factor representing an i-th index; f (Delta)i) An adjustment parameter representing an adjustment factor Δ of the i-th index; k is a radical ofiA normalized index value representing an ith index; k is a radical ofimaxA maximum index value representing an ith index; k is a radical ofiminA minimum index value representing an ith index; e represents a natural constant;
based on electromagnetic emission efficiency eta1And charging efficiency η2To what is calledPerforming comprehensive calculation according to the combined calculation result, and obtaining the maximum charging power P of the target battery according to the comprehensive calculation result W101Obtaining the minimum charging power P of the target battery according to the comprehensive calculation result W202；
Si-1The combined calculation value of the i-1 index and the feedback information m in the sequencing result n from high to low is represented;
the average combination calculation value of n indexes and the feedback information m according to the sequencing result from high to low is represented; s1The combination of the first index in the sequencing result n and the feedback information m is calculated according to the representation; snThe combined calculation value of the last index in the sequencing result n and the feedback information m is represented from high to low;
step A3: determining a loss grade Z of the target battery according to the battery state and the maximum and minimum charging power of the target battery monitored in real time, and determining the current optimal charging power of the target battery according to the loss grade Z;
wherein, s'iThe battery state value of the target battery corresponding to the ith index in the n indexes is represented;
P01represents a maximum charging power of the target battery; p02Represents a minimum charging power of the target battery;
step A4: and C, switching the charging power of the wireless charging equipment in real time according to the optimal charging power obtained in the step A3 and based on preset charging time and energy standards.
8. A wireless charging system based on automatic identification technology, comprising:
the first monitoring module is used for automatically identifying and monitoring the battery state of a target battery, and the battery state comprises: the current residual capacity, the current battery temperature, the current charging state, the charging speed of the target battery and the distance from a charging source point in a chargeable area;
the second monitoring module is used for automatically identifying and monitoring the electromagnetic intensity of a charging coil of the wireless charging equipment and determining a chargeable area corresponding to the electromagnetic intensity;
the receiving module is used for receiving feedback information of the target battery and the charging equipment in the charging process and the non-charging process;
the control module is used for placing the target battery in the chargeable area when the target battery needs to be charged wirelessly, and controlling the charging power of the wireless charging equipment to be switched in real time according to the battery state automatically identified and monitored by the first monitoring module, the feedback information received by the receiving module, the preset charging time and the energy standard so as to realize intelligent charging of the target battery;
control the in-process that wireless charging equipment's charging power switched in real time, in order to guarantee the accuracy that charging power obtained, and then the in-process of the high efficiency of guaranteeing to implement the switching still includes: a safety protection circuit;
the safety protection circuit includes: a transformer M, a first switch K1, a second switch K2, a third switch K3, a fourth switch K4, a fifth switch K4, a sixth switch K4, a seventh switch K4, an eighth switch K4, a first capacitor C4, a second capacitor C4, a third capacitor C4, a fourth capacitor C4, a fifth capacitor C4, a sixth capacitor C4, a seventh capacitor C4, an eighth capacitor C4, a first resistor R4, a second resistor R4, a third resistor R4, a fourth resistor R4, a fifth resistor R4, a sixth resistor R4, a seventh resistor R4, an eighth resistor R4, a ninth resistor R4, a microcontroller U4, an operational amplifier U4, a first diode L4, a second diode L4, a third diode L4, a first VCC N4, a second NPN transistor 4, and a power supply transistor GND;
the wireless transmitting unit in the wireless charging device is connected with the input end of the control unit, and the output end of the controller is respectively connected with one end of the first switch K1, the anode of the first diode L1, one end of the third resistor R3, one end of the eighth capacitor C8, one end of the fourth resistor R4 and one end of the fifth switch K5;
the other end of the first switch K1 is connected with one end of a first resistor R1, and the other end of the first resistor R1 is connected with the other end of a second resistor R2 and one end of a fourth switch K4;
the cathode of the first diode L1 is connected with one end of a second resistor R2;
the other end of the fourth switch K4 and the other end of the fifth switch K5 are connected with the positive input end of an operational amplifier U1;
the inverting input end of the operational amplifier U1 is connected with one end of a sixth switch K6;
the other end of the sixth switch K6 is connected with one end of a first capacitor C1 and one end of a fifth resistor R5;
the other end of the fifth resistor R5 is connected with one end of a second capacitor C2;
the other end of the first capacitor C1, the other end of the second capacitor C2, the other end of the third resistor R3, the other end of the eighth capacitor C8 and the other end of the fourth resistor R4 are connected with the ground GND;
the output end of the operational amplifier U1 is connected with one end of a third capacitor C3, one end of a third switch K3, one end of a fourth capacitor C4, one end of a seventh switch K7 and one end of a microcontroller U2;
the other end of the third capacitor C3 is connected with one end of a second switch K2;
the other end of the second switch K2 is connected with the other end of the third switch K3;
the other end of the fourth capacitor C4 is connected with one end of an eighth switch K8;
the other end of the eighth switch K8 is connected with the other end of the seventh switch K7;
a first output end of the microcontroller U2 is connected with a base electrode of a first NPN transistor, and a second output end of the microcontroller U2 is connected with a base electrode of a second NPN transistor;
the collector of the first NPN transistor is connected with a power supply VCC and the anode of a second diode L2;
the emitter of the first NPN transistor is connected with the input end of the primary coil of the transformer M, and the output end of the primary coil is connected with the collector of a second NPN transistor N2;
the cathode of the second diode L2 is connected with one end of a fifth capacitor C5;
the other end of the fifth capacitor C5 is connected with the cathode of the third diode L3 and the first input end of the communication unit;
the input end of the secondary coil of the transformer M is connected with the anode of a third diode L3;
the output end of the secondary coil is connected with one end of a seventh resistor R7 and one end of a sixth capacitor C6, the other end of the sixth capacitor C6 is connected with one end of a sixth resistor R6, and the other end of the sixth resistor R6 is connected with the second input end of the communication unit;
an emitter of the second NPN transistor N2 is connected to one end of the seventh capacitor C7 and one end of the eighth resistor R8, and the other end of the seventh resistor R7 is connected to one end of the ninth resistor R9;
the other end of the seventh capacitor C7, the other end of the eighth resistor R8, and the other end of the ninth resistor R9 are connected to ground GND.
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