CN111786474B - Foreign matter detection method, foreign matter detection device and wireless charging base - Google Patents

Foreign matter detection method, foreign matter detection device and wireless charging base Download PDF

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CN111786474B
CN111786474B CN202010586138.XA CN202010586138A CN111786474B CN 111786474 B CN111786474 B CN 111786474B CN 202010586138 A CN202010586138 A CN 202010586138A CN 111786474 B CN111786474 B CN 111786474B
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current value
preset
wireless
working current
charging base
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CN111786474A (en
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黄拔梓
黄道臣
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Shenzhen Libode Technology Co ltd
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Shenzhen Libode Technology Co ltd
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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
    • H02J50/60—Circuit arrangements or systems for wireless supply or distribution of electric power responsive to the presence of foreign objects, e.g. detection of living beings
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
    • 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
    • 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
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • 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
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geology (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The application is suitable for the technical field of wireless charging, and provides a foreign matter detection method, a foreign matter detection device, a wireless charging base and a calculation storage medium, through obtaining the working current value of a wireless transmitting module, and judging whether the working current value of the wireless transmitting module is within a preset current value range, if the working current value of the wireless transmitting module is within the preset current value range, the working current value of the wireless transmitting module under a plurality of preset wireless transmitting frequencies is obtained, and a working current value sequence is generated, the working current value sequence is matched with the preset current value sequence, and a foreign matter detection result of the wireless charging base is generated according to a matching structure, so that the foreign matter on the wireless charging base is detected, and the problems of potential safety hazard or power consumption increase when the charging base works abnormally are avoided.

Description

Foreign matter detection method, foreign matter detection device and wireless charging base
Technical Field
The application belongs to the technical field of wireless charging, and particularly relates to a foreign matter detection method, a foreign matter detection device, a wireless charging base and a computer storage medium.
Background
With the improvement of life quality of people, the electric toothbrush is praised as a revolution in the field of oral health care with excellent cleaning effect and massaging effect on gum, and becomes a necessary living article in developed countries such as Europe and America. In China, along with the improvement of the living standard of people and the promotion of the oral health care consciousness, the electric toothbrush is more and more popular to use, and the increasing demand promotes the technical upgrade and the product perfection of various manufacturers.
However, the charging circuit of the current electric toothbrush cannot detect whether foreign matters exist on the charging base, so that the charging base has potential safety hazard or power consumption increase when working abnormally.
Disclosure of Invention
In view of this, embodiments of the present application provide a foreign object detection method, a foreign object detection apparatus, a wireless charging base, and a computer storage medium, which can solve the problem that the existing charging base cannot detect a foreign object and has a potential safety hazard or increased power consumption.
A first aspect of an embodiment of the present application provides a foreign object detection method, which is applied to a wireless charging base, where the wireless charging base includes a wireless transmitting module for transmitting a wireless charging signal, and the foreign object detection method includes:
acquiring a working current value of the wireless transmitting module, and judging whether the working current value of the wireless transmitting module is within a preset current value range;
if the working current value of the wireless transmitting module is within a preset current value range, obtaining the working current value of the wireless transmitting module under a plurality of preset wireless transmitting frequencies, and generating a working current value sequence;
and matching the working current value sequence with a preset current value sequence, and generating a foreign matter detection result of the wireless charging base according to a matching result.
A second aspect of the embodiments of the present application provides a foreign object detection device, which is configured on a wireless charging base, wherein the wireless charging base includes a wireless transmitting module for transmitting a wireless charging signal, and the foreign object detection device includes:
the judging module is used for acquiring the working current value of the wireless transmitting module and judging whether the working current value of the wireless transmitting module is within a preset current value range or not;
the generating module is used for acquiring the working current values of the wireless transmitting module under a plurality of preset wireless transmitting frequencies and generating a working current value sequence if the working current value of the wireless transmitting module is within a preset current value range;
and the matching module is used for matching the working current value array with a preset current value array and generating a foreign matter detection result of the wireless charging base according to a matching result.
A third aspect of embodiments of the present application provides a wireless charging base, including: the foreign object detection device comprises a wireless transmission module, a memory, a processor and a computer program which is stored in the memory and can run on the processor, wherein the wireless transmission module is used for transmitting a wireless charging signal, and the processor executes the computer program to realize the steps of the foreign object detection method.
A fourth aspect of embodiments of the present application provides a computer storage medium storing a computer program that, when executed by a processor, implements the steps of the method described above.
The embodiment of the application provides a foreign matter detection method, a foreign matter detection device, a wireless charging base and a calculation storage medium, by obtaining a working current value of a wireless transmitting module and judging whether the working current value of the wireless transmitting module is within a preset current value range, if the working current value of the wireless transmitting module is within the preset current value range, the working current value of the wireless transmitting module under a plurality of preset wireless transmitting frequencies is obtained, a working current value sequence is generated, the working current value sequence is matched with the preset current value sequence, and a foreign matter detection result of the wireless charging base is generated according to a matching structure, so that the foreign matter on the wireless charging base is detected, and the problems of potential safety hazards or power consumption increase when the charging base works abnormally are solved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic flow chart illustrating an implementation of a foreign object detection method according to an embodiment of the present disclosure;
fig. 2 is a schematic flow chart of an implementation of step 30 in the foreign object detection method provided in the embodiment of the present application;
fig. 3 is a schematic diagram illustrating a matching between a working current value sequence and a preset current value sequence according to an embodiment of the present disclosure;
FIG. 4 is a schematic flow chart of an implementation of the foreign object processing determination step provided in the embodiment of the present application;
FIG. 5 is a schematic flow chart of an implementation of the fast charge adjustment step provided in the embodiment of the present application;
FIG. 6 is a schematic flow chart of an implementation of a fullness detecting step provided by an embodiment of the present application;
fig. 7 is a schematic view of a foreign object detection apparatus according to an embodiment of the present disclosure;
fig. 8 is a schematic structural diagram of a wireless charging base according to an embodiment of the present application.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.
The technical solutions in the embodiments of the present application will be described clearly 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. 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.
Fig. 1 is a schematic view of an implementation process of a foreign object detection method according to an embodiment of the present application, where the foreign object detection method is applied to a wireless charging base, and the wireless charging base includes a wireless transmitting module for transmitting a wireless charging signal. Referring to fig. 1, the foreign object detection method may include: step 10 to step 30.
And step 10, acquiring a working current value of the wireless transmitting module, and judging whether the working current value of the wireless transmitting module is within a preset current value range.
In this embodiment, the wireless transmitting module is used for transmitting a wireless charging signal, and determines whether the acquired working current value is within a preset current value range by acquiring the working current value of the wireless transmitting module, so as to determine whether a foreign object exists on the wireless charging base. Because the wireless transmitting module mainly comprises inductance coils, the wireless receiving module in the preset charging equipment also comprises inductance coils, when the two inductance coils are close to each other, the magnetic field change of one inductance coil influences the magnetic field of the other inductance coil, namely, the mutual inductance phenomenon occurs in the working process of the two inductance coils, and the mutual inductance depends on the coupling degree of the self inductance of the inductance coils and the two inductance coils, so that different charging equipment has unique inductance coils. In this embodiment, because the wireless transmitting module and the preset charging device both have their unique inductance coils, after the wireless charging base is started, it is also possible to determine whether there is a foreign object on the wireless charging base based on the working current value of the wireless transmitting module at the preset starting detection frequency by obtaining the working current value of the wireless transmitting module at the preset starting detection frequency.
The preset current value range in this embodiment may be a current value range determined by a user in advance according to a foreign object detection condition, for example, a lower limit value of the preset current value range is used to determine whether a metal object exists on the wireless charging base, if the working current value is smaller than the lower limit value, it is determined that no metal object exists, if the working current value is greater than or equal to the lower limit value, it is determined that a metal object exists, an upper limit value of the preset current value range is used to determine whether the charging device is a preset charging device, if the working current value is greater than the upper limit value, it is determined that an object on the wireless charging base is not a preset charging device, and if the working current value is smaller than or equal to the upper limit value, it is determined that the object on the wireless charging base is a preset charging device or a metal object similar to the preset charging device.
And 20, if the working current value of the wireless transmitting module is within a preset current value range, obtaining the working current value of the wireless transmitting module under a plurality of preset wireless transmitting frequencies, and generating a working current value sequence.
In this embodiment, if the working current value of the wireless transmitting module is within the preset current value range, it indicates that the object on the wireless charging base is the preset charging device or a metal object similar to the preset charging device, and therefore, in order to determine whether the object is the preset charging device, the working current value series is generated by collecting the working current values of the wireless transmitting module at a plurality of wireless transmitting frequencies and based on the plurality of working current values, so as to further determine whether the object on the wireless charging base is the preset charging device.
Specifically, because wireless transmitting module mainly comprises inductance coils, predetermine wireless receiving module in the battery charging outfit and also comprises inductance coils, two sets of inductance coils make being close to each other, and another inductance coil will be influenced in the magnetic field change of an inductance coil, and two sets of inductance coils take place mutual induction phenomenon in the course of the work promptly, and mutual inductance's size depends on inductance coil's self-inductance and two inductance coil coupling's degree, consequently, different battery charging outfit have its unique inductance coil. In this embodiment, since the wireless transmitting module and the preset chargeable device both have their unique inductance coils, the working current value of the wireless transmitting module at a plurality of wireless transmitting frequencies is collected to generate a working current value sequence, and based on the working current value sequence, it can be identified whether the object on the wireless charging base is the preset chargeable device.
And step 30, matching the working current value sequence with a preset current value sequence, and generating a foreign matter detection result of the wireless charging base according to a matching result.
In the embodiment of the application, since the metal objects have their specific inductance characteristics, for example, the mutual inductance coefficients of the resistor, the capacitor and the inductor are different and greatly different when approaching the inductance coil in the wireless transmitting module, further, the metal structure and the circuit structure in the preset charging device have a large influence on the inductance characteristics, and therefore, for the preset charging device, the charging devices of different models have their specific current value sequences. In the present embodiment, the foreign matter detection result is generated based on the matching result by matching the operation current value sequence with the preset current value sequence.
In one embodiment, referring to fig. 2, in step 30, a foreign object detection result of the wireless charging base is generated according to the matching result, which includes steps 31 and 32.
And step 31, if the working current value array is consistent with a preset current value array, determining that no foreign matter exists on the wireless charging base.
In this embodiment, the operating current value sequence is matched with a preset current value sequence, for example, the plurality of preset wireless transmission frequencies include f1, f2 and f3, the operating current values collected at the plurality of preset wireless transmission frequencies are I1, I2 and I3, the preset current values are I1, I2 and I3, and if the operating current value sequence (I1, I2 and I3) is consistent with the preset current value sequence (I1, I2 and I3), it is determined that no foreign object exists on the wireless charging base.
In one embodiment, the matching between the working current value sequence and the preset current value sequence may be a current value curve, for example, if the preset current value sequence is an ascending trend and the working current value sequence is an ascending trend, it is determined that the working current value sequence is matched with the preset current value sequence, the preset current value sequence is wavy, and the working current value sequence is wavy, it is determined that the working current value sequence is matched with the preset current value sequence.
In an embodiment, the matching of the working current value sequence and the preset current value sequence may be that the detected working current value sequence is the same as the preset current value sequence, or the similarity reaches a preset percentage, for example, the similarity reaches 80%, and then the matching is determined to be consistent.
In one embodiment, each charging device has a unique inductance characteristic, and therefore, by acquiring operating current values of the wireless transmission module at a plurality of wireless transmission frequencies, the plurality of wireless transmission frequencies correspond to an operating current value sequence consisting of a plurality of operating current values, and the corresponding charging device is determined according to the operating current value sequence, for example, the operating current value sequence matches with a preset current value sequence, if the matching is consistent, it is determined that the charging device on the charging base is a preset charging device, that is, no foreign object exists, and if the matching is inconsistent, it is determined that the charging device on the charging base is a non-preset charging device, that is, a foreign object exists.
And 32, if the working current value array is not consistent with a preset current value array, judging that foreign matters exist on the wireless charging base.
In this embodiment, if the operating current sequence is not matched with the preset current value sequence, it indicates that the object on the wireless charging base is not the preset charging device, so as to determine that the object on the wireless charging base is a foreign object.
In one embodiment, in step 31, if the operating current value sequence matches the preset current value sequence, the method includes: and judging whether the wireless transmitting frequency corresponding to the maximum current value in the working current value array is positioned in a preset frequency threshold interval, if so, judging that the working current value array is matched with the preset current value array consistently.
In this embodiment, a plurality of working current values in the working current value sequence are in one-to-one correspondence with a plurality of preset wireless transmission frequencies, for example, the preset wireless transmission frequency is used as an abscissa, the working current value is a ordinate, the plurality of working current values in the working current value sequence are sequentially connected to form a waveform curve, if the wireless transmission frequency corresponding to the maximum current value in the working current value sequence is located in a preset frequency threshold interval, it is determined that the working current value sequence is consistent with the preset current value sequence in a matching manner, and at this time, the wireless transmission module can be controlled to enter a fast charging state, that is, the wireless transmission module is driven to alternately operate under at least two working voltages.
In one embodiment, referring to fig. 3, the plurality of preset wireless transmission frequencies include f1, f2, f3, f4 and f5, as shown in fig. 2, the operating current values collected under the preset wireless transmission frequencies F1, F2, F3, F4 and F5 are i1, i2, i3, i4 and i5 respectively, the operating current values i1, i2, i3, i4 and i5 are sequentially connected to form a waveform curve W1, W2 is a waveform curve formed by a preset current value sequence, the operating current value i3 is the maximum current value in the working current value sequence, the wireless transmission frequency corresponding to the operating current value i3 is F3, the preset frequency threshold interval is [ F1, F2], if F3 is located in the preset frequency threshold interval [ F1, F2], and judging that the working current value sequence is matched with the preset current value sequence uniformly, and if F3 is positioned outside a preset frequency threshold interval [ F1, F2], judging that the working current value sequence is not matched with the preset current value sequence uniformly.
In one embodiment, in step 31, if the operating current value sequence matches the preset current value sequence, the method includes: judging whether the working current value i0 corresponding to the preset transmitting frequency F0 is the maximum current value in the working current sequence, if so, judging that the working current value sequence is matched with the preset current value sequence; wherein the plurality of preset wireless transmission frequencies includes the preset transmission frequency F0.
In this embodiment, a working current value of the wireless transmission frequency under a plurality of preset transmission frequencies is obtained, and a working current value sequence is generated, where the plurality of preset transmission frequencies include F0, a plurality of working current values in the working current value sequence correspond to the plurality of preset wireless transmission frequencies one to one, whether the working current value i0 corresponding to the preset transmission frequency F0 is a maximum current value in the working current value sequence is determined, if yes, it is determined that the working current value sequence matches the preset current value sequence consistently, and if not, it is determined that the working current value sequence matches the preset current value sequence inconsistently.
Specifically, in the preset current value sequence, the preset working current value corresponding to the wireless transmission frequency F0 is the maximum current value, and therefore, if the working current value sequence generated by the wireless transmission module under a plurality of preset wireless transmission frequencies matches with the preset current value sequence, the working current value i0 of the wireless transmission module under the wireless transmission frequency F0 reaches the maximum value, that is, when the wireless transmission frequency is less than F0, the corresponding working current value is less than i0, and when the wireless transmission frequency is greater than F0, the corresponding working current value is less than i 0.
In one embodiment, the upper frequency threshold F2 in the preset frequency threshold interval [ F1, F2] may be the same as the lower frequency threshold F1, and F2 ═ F1 ═ F0, at this time, it is determined whether the wireless transmission frequency corresponding to the maximum current value in the operating current number series is F0, and if so, it is determined that the operating current number series matches the preset current number series.
In one embodiment, in step 20, the preset current value range includes a first current threshold, and the first current threshold is a lower limit of the preset current value range, and if the working current value is smaller than the first current threshold, it is determined that the wireless charging base is in an idle state.
In this embodiment, if the working current value of the wireless transmitting module is smaller than a preset first current threshold, and the first current threshold is a lower limit value of a preset current value range, it indicates that there is no metal object on the wireless charging base, that is, it can be determined that there is no object on the wireless charging base, and the wireless charging base is in an idle state.
Further, in an embodiment, if the working current of the wireless transmitting module is still smaller than the preset first current threshold after the preset time period, the wireless transmitting module may be controlled to stop working, so as to avoid energy consumption increase and electric energy waste caused by the wireless transmitting module always transmitting the wireless charging signal.
In one embodiment, in step 20, the preset current value range includes a second current threshold, and the second current threshold is an upper limit value of the preset current value range, and if the working current value is greater than the second current threshold, it is determined that the wireless charging base is in a foreign object state.
In this embodiment, if the working current value of the wireless transmitting module is greater than the preset second current threshold, and the second current threshold is the upper limit of the preset current value range, it may be determined that a foreign object exists on the wireless charging base, and the foreign object is neither the preset charging device nor a metal object similar to the preset charging device, and it may be directly determined that the object on the wireless charging base belongs to the foreign object.
In one embodiment, if the working current value sequence is not consistent with the preset current value sequence in a matching manner, it is determined that the wireless charging base is in a foreign matter state.
In the embodiment of the application, since the metal objects have specific inductance characteristics, for example, mutual inductance coefficients of a resistor, a capacitor and an inductor when the metal objects are close to an inductance coil in a wireless transmission module are not only different, but also have larger difference, further, a metal structure and a circuit structure in the preset charging device have larger influence on the inductance characteristics, and therefore, for the preset charging device, charging devices of different models have specific current value sequences. In this embodiment, the working current value sequence is matched with the preset current value sequence, and if the working current value sequence is not matched with the preset current value sequence, it is determined that the wireless charging base is in a foreign matter state.
In one embodiment, in step 30, the working current value sequence is matched with the preset current value sequence, if the working current value sequence is matched with the preset current value sequence, it is determined that there is no foreign object on the wireless charging base, and at this time, the wireless transmitting module is driven to alternately operate under at least two working voltages, so as to drive the wireless charging base to enter a fast charging state.
Specifically, in this embodiment, if the characteristics of the operating current value sequence are consistent with those of the preset current value sequence or the variation trends in the sequence are consistent with each other, it is determined that there is no foreign object on the wireless charging base, and the wireless charging base enters a fast charging state.
In this embodiment, the operating current value sequence is matched with a preset current value sequence, for example, the plurality of preset wireless transmission frequencies include f1, f2 and f3, the operating current values collected at the plurality of preset wireless transmission frequencies are I1, I2 and I3, the preset current values are I1, I2 and I3, and if the operating current value sequence (I1, I2 and I3) is consistent with the preset current value sequence (I1, I2 and I3), it is determined that no foreign object exists on the wireless charging base.
In one embodiment, the working current value sequence and the preset current value sequence are matched and consistent, which may be that the current value curves in the working current value sequence have consistent variation trends, for example, the working current value sequence generated by the wireless transmitting module under a plurality of preset wireless transmitting frequencies has the same variation trend as the preset current value sequence, that is, the maximum working current value is reached under the same wireless transmitting frequency, and it is determined that the working current value sequence and the preset current value sequence are matched and consistent; if the preset current value array is a waveform curve and the working current value array is the same waveform curve, judging that the working current value array is matched with the preset current value array consistently; and if the preset current value sequence is a parabolic curve with a downward opening, and the working current value sequence is also in the same parabolic shape with the downward opening, judging that the working current value sequence is matched with the preset current value sequence.
In an embodiment, the matching of the working current value sequence and the preset current value sequence may be that the detected working current value sequence is the same as the preset current value sequence, or the matching is determined to be consistent when the similarity reaches a preset percentage, for example, the similarity reaches 80% or more.
In one embodiment, each charging device has a unique inductance characteristic, and therefore, by acquiring operating current values of the wireless transmitting module at a plurality of wireless transmitting frequencies, the plurality of wireless transmitting frequencies correspond to an operating current value sequence consisting of a plurality of operating current values, and the corresponding charging device is determined according to the operating current value sequence, for example, the operating current value sequence matches with a preset current value sequence, if the operating current value sequence matches with the preset current value sequence, it is determined that the charging device on the charging base is the preset charging device, and if the operating current value sequence does not match with the preset current value sequence, it is determined that the charging device on the charging base is a non-preset charging device, that is, a foreign object exists, and at this time, the wireless charging base is in a foreign object state.
In an embodiment, when the operating current value of the wireless transmitting module is detected to be within a preset operating current value range, it is indicated that an object is placed on the wireless charging base at this time, and the object may be a foreign object of the pre-charging device or a non-preset charging device, and at this time, it may be further determined whether the operating current value sequence matches the preset current value sequence by using the following foreign object detection method, that is, whether the object on the wireless charging base is the pre-charging device or another foreign object, where the foreign object detection method includes the following steps:
collecting working current values of a wireless transmitting module under a plurality of preset wireless transmitting frequencies, and generating a working current value sequence; and if the obtained result shows that the negative number appears first and then the positive number appears, the object on the wireless charging base is pre-charging equipment, namely the working current value sequence is matched with the preset current value sequence.
Specifically, for example, in a preferred embodiment, the plurality of preset wireless transmission frequencies include f1, f2, f3 and f4, and f1, f2, f3 and f4 are sequentially increased, and the number of the working current values collected at the plurality of preset wireless transmission frequencies is i1, i2, i3 and i 4; subtracting the latter term from the former term of the operating current value series i1, i2, i3, i4 to obtain three current difference values: i1-i2, i2-i3, i3-i 4; if all the three current difference values are positive numbers, the object on the wireless charging base is a foreign object, if the three obtained current difference values first show a negative number and then show a positive number, the object on the wireless charging base is a pre-charging device.
In another preferred embodiment, the plurality of preset wireless transmission frequencies include f1, f2, f3 and f4, wherein f1, f2, f3 and f4 are sequentially decreased, and the number of the working current values collected at the plurality of preset wireless transmission frequencies is i1, i2, i3 and i 4; subtracting the latter item from the former item of the working current value series i1, i2, i3 and i4 to obtain three current difference values, i1-i2, i2-i3 and i3-i 4; if all the obtained three current difference values are negative numbers, the object on the wireless charging base is a foreign matter, if the three obtained results show that the negative numbers appear first and then positive numbers appear, the object on the wireless charging base is the pre-charging equipment.
In one embodiment, the former item in the working current value sequence is subtracted from the latter item to obtain a plurality of current difference values, and if each of the obtained plurality of current difference values is a positive number or a negative number, it is determined that a foreign object exists on the wireless charging base, and the wireless charging base is in a foreign object state.
In one embodiment, if the wireless charging base is judged to have foreign matters, the power supply to the wireless transmitting module is turned off.
In this embodiment, after judging that there is the foreign matter on the wireless base that charges, can reach energy-conserving purpose through closing supplying power to wireless transmitting module, not only can avoid the power consumption of wireless transmitting module in abnormal working process, can also avoid wireless transmitting module to take place incident such as short circuit in abnormal working process.
Further, in an embodiment, if it is determined that there is a foreign object on the wireless charging base, the wireless transmission frequency of the wireless transmission module may be reduced, or the operating voltage of the wireless transmission module may be reduced.
In this embodiment, if it is determined that there is a foreign object on the wireless charging base, the wireless transmission frequency of the wireless transmission module may be reduced, or the operating voltage of the wireless transmission module may be reduced, so as to reduce the energy consumption of the wireless charging base in a non-charging phase, for example, the operating voltage of the wireless transmission module is reduced from a high voltage to a low voltage, or the operating voltage of the wireless transmission module is set to a preset voltage set to detect a foreign object state.
In one embodiment, after determining that the wireless charging base is in the foreign object state, a foreign object processing determining step is further included, specifically, referring to fig. 4, the foreign object processing determining step includes steps 41 to 43.
And step 41, acquiring a working current value of the wireless transmitting module.
And 42, comparing the working current value with a preset foreign matter treatment current value.
In this embodiment, the wireless charging base is in a foreign matter state, the power supply of the wireless transmitting module is turned off, and after the turning-off duration reaches the preset duration T1, the power supply of the wireless transmitting module is turned on, and the working current value of the wireless transmitting module is collected again.
In one embodiment, the steps of detecting the foreign object in steps 10, 20 and 30 may be performed again directly after the power supply to the wireless transmission module is turned off for a preset time period T1.
And 43, if the working current value is smaller than the foreign matter treatment current value, determining that the wireless charging base is in an idle state, and if the working current value is not smaller than the foreign matter treatment current value, determining that the wireless charging base is still in a foreign matter state.
In this embodiment, if the collected operating current value is greater than the foreign object treatment current value, it can be determined that there is a foreign object on the wireless charging base, and the wireless charging base is still in a foreign object state.
In one embodiment, when the wireless charging base is in the foreign object state, the foreign object processing determination is performed at preset time intervals T1.
In this embodiment, by comparing the operating current value collected at preset time interval T1 with the foreign matter treatment current value, it can be determined whether there is any foreign matter on the wireless charging base, and if the operating current value of the wireless transmitting module is smaller than the foreign matter treatment current value, it is determined that the foreign matter on the wireless charging base has been removed.
In this embodiment, if the collected working current value is smaller than the foreign object treatment current value, step 10, step 20, and step 30 are executed again after the preset time interval T3, to determine whether the charging device on the wireless charging base is the preset charging device, and if so, the wireless transmitting module is controlled to enter the fast charging mode to charge the preset charging device.
In one embodiment, in step 42, if the working current value is not less than the foreign object treatment current value, it is determined that the wireless charging base is still in the foreign object state, and the power supply to the wireless transmitting module is turned off again.
In one embodiment, in step 10, obtaining the operating current value of the wireless transmitting module specifically includes: and collecting the working current value of the wireless transmitting module at preset time intervals T4.
In this embodiment, the working current value of the wireless transmitting module is collected at preset time intervals T4, the working state of the wireless charging base can be detected in real time, for example, if the charging device is located on the wireless charging base and is in a normal power supply state, if other metal objects appear on the wireless charging base or magnetic impurities are doped, the charging device is abnormal in charging, at the moment, the working current value of the wireless transmitting module is collected at preset time intervals T4, whether the charging device is abnormal in the charging process can be detected, and the potential safety hazard is avoided.
In one embodiment, in step 30, the working current value sequence is matched with a preset current value sequence, and a foreign object detection result of the wireless charging base is generated according to the matching result, where the foreign object detection result may be a flashing warning light signal or a voice playing signal, for example, when the matching result shows that a foreign object exists, a voice signal "foreign object exists in the wireless charging base" is played.
In one embodiment, if the working current value array is matched with the preset current value array, and the object on the wireless charging base is determined to be the preset device to be charged according to the matching result, the wireless transmitting module is driven to alternately work under at least two working voltages.
Specifically, in one embodiment, the driving the wireless transmitting module to alternately operate at least two operating voltages includes: driving the wireless transmission module to alternately work at a first working voltage and a second working voltage in each working period T; the duration of the first working voltage in the working period T is TA, the ratio of TA to T is a first ratio, and the value range of the first ratio is [0.1, 0.9 ].
In this embodiment, the wireless transmission module is driven to alternately operate at the first operating voltage and the second operating voltage in each operating period T, so that the temperature of the wireless charging base can be controlled within a preset temperature range, specifically, the duration of the first operating voltage in each operating period T is TA, the duration of the second operating voltage in each operating period T is TB, TA + TB is T, the ratio of TA to T is a first ratio, and the value range of the first ratio may be [0.1, 0.9 ].
In one embodiment, when the first ratio is 0.1, that is, the duration of the first operating voltage is one tenth of the entire operating period T, at this time, the charging current of the wireless transmitter module is 250mA, the charging temperature of the wireless transmitter module is about 40 °, that is, the temperature of the charging coil is about 40 °; when the first ratio is 0.9, that is, the duration of the first working voltage accounts for nine tenth of the whole working period T, at this time, the charging current of the wireless transmission module is 400mA, the charging temperature of the wireless transmission module is about 65 °, that is, the temperature of the charging coil is about 65 °.
In one embodiment, the operating voltage of the wireless transmitting module may be adjusted by controlling the operating state of the voltage adjusting module, for example, when the voltage adjusting module is in the first operating state, the wireless transmitting module operates at the first operating voltage, and when the voltage adjusting module is in the second operating state, the wireless transmitting module operates at the second operating voltage.
In one embodiment, the first operating state of the voltage regulation module may be an on state and the second operating state of the voltage regulation module may be an off state. That is, when the voltage regulation module is in the on state, the wireless transmitting module works in the fast charging mode, and when the voltage regulation module is in the off state, the wireless transmitting module works in the ordinary charging mode or the wireless transmitting module stops transmitting the wireless charging signal.
In one embodiment, after driving the wireless transmitting module to alternately operate at least two operating voltages, a fast charge adjusting step may be further included, as shown in fig. 5, where the fast charge adjusting step includes step 51 and step 52.
And step 51, comparing the working current value with the quick charge regulation range value.
Step 52, when the working current value is smaller than the lower limit value of the quick charge regulation range value, increasing a first ratio; and when the working current value is larger than the upper limit value of the quick charge adjusting range value, reducing the first ratio.
In this embodiment, the working current value of the wireless transmitting module is monitored in real time, for example, the working current value of the wireless transmitting module is detected at preset time intervals, and the temperature of the wireless charging base is monitored in real time according to the working current value, for example, if the working current value of the wireless transmitting module is smaller than the lower limit value of the fast charging adjustment range value, the temperature of the wireless charging base is determined to be lower, at this time, the charging speed of the wireless charging base can be increased by increasing the first ratio, that is, by increasing the holding time of the first working voltage in each working period T, so as to achieve the purpose of fast success, if the working current value of the wireless transmitting module is greater than the upper limit value of the fast charging adjustment range value, the temperature of the wireless charging base is determined to be higher, at this time, by decreasing the first ratio, that is, that by decreasing the holding time of the first working voltage in each working period T, therefore, the working current value of the wireless transmitting module is reduced by reducing the working time of the wireless transmitting module under the first working voltage, the heat productivity of the wireless charging base is further reduced, and the purpose of reducing the temperature of the wireless charging base is achieved. The quick charging adjustment is realized by controlling the working current value within the quick charging adjustment range value, so that the quick charging working current value is dynamically controlled, the high-efficiency quick charging of the wireless charging base is ensured, and the charging temperature of the wireless charging base is dynamically regulated and controlled to be not more than an ideal range.
In one embodiment, the fast charge adjusting step in this embodiment further includes: the first ratio is adjusted based on the electric quantity signal output by the device to be charged, for example, the electric quantity signal and the first ratio are in a preset inverse proportional relationship, the inverse proportional relationship may be a preset linear relationship or a preset curve relationship, and the lower the electric quantity of the device to be charged represented by the electric quantity signal is, the higher the first ratio is, so that when the electric quantity of the device to be charged is lower, the duration time of the first working voltage in each working period T is increased to increase the charging speed.
In one embodiment, the fast charge adjusting step in this embodiment further includes: and determining a quick charging parameter according to the working current value sequence generated by the wireless transmitting module under a plurality of preset wireless transmitting frequencies so as to control the wireless transmitting module to generate a corresponding wireless charging signal and charge the equipment to be charged.
Specifically, in this embodiment, a corresponding working current value sequence may be generated by obtaining working current values of the wireless transmitting module at a plurality of wireless transmitting frequencies, so as to determine a model of a device to be charged on the wireless charging base, and thus determine corresponding fast charging parameters.
In one embodiment, the type of the device to be charged is matched through the working current value array to determine the corresponding fast charging parameters, that is, each device to be charged has the corresponding fast charging parameter, and the device to be charged is charged by setting the corresponding fast charging parameters, so that the problem that the device to be charged is damaged due to the fact that the working voltage or the working current is not matched can be avoided.
In one embodiment, the working current value sequence and the type or specific model of the device to be charged have a preset mapping relationship, each type or specific model of the device to be charged corresponds to one working current value sequence, the type or model of the device to be charged can be determined based on the working current value sequence, and then the corresponding fast charging parameter is determined based on the type or model of the device to be charged.
Specifically, for example, the operating current value series of the wireless transmission module at a plurality of wireless transmission frequencies are detected as i1, i2, i3, i4 and i5, based on the operating current value series i1, i2, i3, i4 and i5, the type or model of the device to be charged can be obtained from a mapping relation database between the preset operating current value series and the type (or model) of the device to be charged, and then the corresponding fast charging parameter is determined based on the type or model of the device to be charged.
In one embodiment, the model of the device to be charged is matched through the working current value number series to determine the corresponding fast charging parameter, for example, the device to be charged is an electric toothbrush, and the working current value of each electric toothbrush under a plurality of preset working voltages has the working current value number series corresponding to the electric toothbrush, so that the model of the electric toothbrush to be charged is determined by matching the working current value number series, and the corresponding fast charging parameter is determined, thereby not only achieving the purpose of fast charging, but also avoiding charging faults caused by different product models of the device to be charged.
In one embodiment, the fast charge parameter may be at least one of a first ratio, a duty cycle T, a wireless transmission frequency, a first operating voltage, and a second operating voltage.
Specifically, the ratio of the duration TA of the first working voltage in each working period T to the working period T may be determined according to the working current value sequence; the working period of the wireless transmission module working alternately at the first working voltage and the second working voltage can be determined according to the working current value sequence; the wireless transmitting frequency of the wireless transmitting module can be determined according to the working current value sequence; the voltage value of the first operating voltage may also be determined from the sequence of operating current values and the voltage value of the second operating voltage may be determined from the sequence of operating current values.
In one embodiment, determining the wireless transmission frequency of the wireless transmission module according to the operating current value sequence specifically includes: and acquiring the wireless transmitting frequency corresponding to the working current value sequence from a preset current value sequence database according to the working current value sequence.
Specifically, the preset current value array database in this embodiment may be a mapping relation table between working current value arrays and wireless transmission frequencies, where each working current value array corresponds to one wireless transmission frequency, and the wireless transmission frequency is a frequency for charging the device to be charged by the wireless transmission module. For example, the current value sequence database includes N operating current value sequences and N wireless transmission frequencies, where N is a positive integer, the N operating current value sequences respectively correspond to the N wireless transmission frequencies one by one, and the operating current value sequences in the non-operating current value sequence database all correspond to the standby wireless transmission frequency, where the standby wireless transmission frequency is used to control the wireless transmission module to be in a standby state. In a specific application, if the working current value sequence of the wireless transmitting module at the preset wireless transmitting frequency does not belong to the preset N working current value sequences, it is indicated that the device to be charged is an illegal charging device, and at this time, the wireless transmitting module is in a standby state, and charging of the device on the wireless charging base is rejected.
In an embodiment, the temperature of the wireless charging base can be detected at preset temperature detection time intervals, the temperature of the wireless charging base can be monitored in real time, and damage to devices due to overhigh temperature of the wireless charging base is avoided.
In one embodiment, referring to fig. 6, after the fast charge adjusting step, a full charge detecting step is further included, and the full charge detecting step includes steps 61 to 63.
And 61, switching the wireless transmission frequency of the wireless transmission module to be full of detection frequency.
And step 62, acquiring a full detection current value of the wireless transmitting module at the full detection frequency.
And step 63, comparing the full-filling detection current value with a preset full-filling reference value, and judging that the current is full when the full-filling detection current value is smaller than the full-filling reference value.
Specifically, in one embodiment, the charging is determined to be full by switching the wireless transmission frequency of the wireless transmission module to the full-charge detection frequency and determining whether the device to be charged is full based on the full-charge detection current value of the wireless transmission module at the full-charge detection frequency, for example, when the full-charge detection current value is smaller than the full-charge reference value.
In one embodiment, after a preset time interval T2, the device to be charged is full-detected, and it is determined whether the device to be charged is full based on the full-detection current value of the wireless transmission module at the full-detection frequency, if so, a preset adjustment operation is performed, and the wireless transmission module is controlled to be in a standby state, and if not, the adjustment operation is not performed.
In this embodiment, the preset full detection frequency may be determined based on the type or specific model of the device to be charged. The wireless transmitting frequency of the wireless transmitting module is adjusted to the preset full detection frequency by adjusting the wireless transmitting frequency of the wireless transmitting module after the preset time interval T2, and the working current value of the wireless transmitting module at the full detection frequency is acquired.
In an embodiment, the preset time interval T2 for the full charge detection may be determined by a type or a specific model of the device to be charged, specifically, the type or the specific model of the device to be charged may be determined based on the operating current value sequence, the type or the specific model of the device to be charged and the preset time interval T2 have a preset mapping relationship, and each type or the specific model of the device to be charged corresponds to one preset time interval T2. In a specific application scenario, the device to be charged is full or nearly full after the preset time interval T2, and therefore, whether the device to be charged is full is determined by detecting the operating current value of the wireless transmission module at the full detection frequency.
It should be noted that, for simplicity of description, the foregoing method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present application is not limited by the order of acts, as some steps may, in accordance with the present application, occur in other orders.
In an embodiment, referring to fig. 7, the present embodiment further provides a foreign object detection apparatus 80, and in the present embodiment, the foreign object detection apparatus includes a determining module 810, a generating module 820, and a matching module 830.
The determining module 810 is configured to obtain a working current value of the wireless transmitting module, and determine whether the working current value of the wireless transmitting module is within a preset current value range.
A generating module 820, configured to obtain a working current value of the wireless transmitting module at a plurality of preset wireless transmitting frequencies and generate a working current value sequence if the working current value of the wireless transmitting module is within a preset current value range.
And the matching module 830 is configured to match the working current value sequence with a preset current value sequence, and generate a foreign object detection result of the wireless charging base according to a matching result.
In this embodiment, the wireless transmitting module is configured to transmit a wireless charging signal, and determine whether a foreign object exists on the wireless charging base by acquiring an operating current value of the wireless transmitting module and determining whether the acquired operating current value is within a preset current value range by the determining module 810, where the preset current value range in this embodiment may be a current value range that is determined by a user in advance according to a foreign object detection condition, for example, a lower limit of the preset current value range is used to determine whether a metal object exists on the wireless charging base, if the operating current value is smaller than the lower limit, it is determined that no metal object exists, if the operating current value is greater than or equal to the lower limit, it is determined that a metal object exists, an upper limit of the preset current value range is used to determine whether the charging device is a preset charging device, and if the operating current value is greater than the upper limit, it is determined that the object on the wireless charging base is not a preset charging device, if the working current value is smaller than or equal to the upper limit value, the object on the wireless charging base is judged to be a preset charging device or a metal object similar to the preset charging device.
In this embodiment, if the acquired working current value of the wireless transmitting module is within the preset current value range, it indicates that the object on the wireless charging base is the preset charging device or a metal object similar to the preset charging device, and therefore, in order to determine whether the object is the preset charging device, the generating module 820 obtains the working current values of the wireless transmitting module under a plurality of wireless transmitting frequencies, and generates a working current value sequence based on the plurality of working current values, so as to further determine whether the object on the wireless charging base is the preset charging device.
Specifically, because wireless transmitting module mainly comprises inductance coils, predetermine wireless receiving module in the battery charging outfit and also comprises inductance coils, two sets of inductance coils make being close to each other, and another inductance coil will be influenced in the magnetic field change of an inductance coil, and two sets of inductance coils take place mutual induction phenomenon in the course of the work promptly, and mutual inductance's size depends on inductance coil's self-inductance and two inductance coil coupling's degree, consequently, different battery charging outfit have its unique inductance coil. In this embodiment, since the wireless transmitting module and the preset chargeable device both have their unique inductance coils, the generating module 820 obtains the operating current value of the wireless transmitting module at multiple wireless transmitting frequencies to generate an operating current value sequence, and the matching module 830 can identify whether the object on the wireless charging base is the preset chargeable device based on the operating current value sequence.
In the embodiment of the application, since the metal objects have their specific inductance characteristics, for example, the mutual inductance coefficients of the resistor, the capacitor and the inductor are different and greatly different when approaching the inductance coil in the wireless transmitting module, further, the metal structure and the circuit structure in the preset charging device have a large influence on the inductance characteristics, and therefore, for the preset charging device, the charging devices of different models have their specific current value sequences. In the present embodiment, the operating current value sequence is matched with the preset current value sequence by the current value matching module 830, so that the foreign object detection result is generated based on the matching result.
It should be noted that, for convenience and brevity of description, the specific working process of the foreign object detection apparatus 80 described above may refer to the corresponding process of the method described in fig. 1 to fig. 6, and is not described herein again.
The embodiment of the present application further provides a wireless charging base 9, and as shown in fig. 8, the wireless charging base 9 includes: a wireless transmitting module 93, a processor 90, a memory 91 and a computer program 92 stored in the memory 91 and operable on the processor 90, wherein the wireless transmitting module 93 is used for transmitting a wireless charging signal, and the processor executes the computer program to implement the steps of the foreign object detection method according to any one of the above embodiments.
The processor 90, when executing the computer program 92, implements the steps in the above-described foreign object detection method embodiments, such as the steps 10 to 30 shown in fig. 1. Alternatively, the processor 90, when executing the computer program 92, implements the functionality of the various modules/units in the various device embodiments described above, e.g., the functionality in modules 810, 820, and 830 shown in fig. 8.
Illustratively, the computer program 92 may be partitioned into one or more modules/units, which are stored in the memory 91 and executed by the processor 90 to accomplish the present application. One or more of the modules/units may be a series of computer program instruction segments capable of performing specific functions that describe the execution of the computer program 92 in the wireless charging base 9.
The wireless charging base 9 may include, but is not limited to, a processor 90, a memory 91. Those skilled in the art will appreciate that fig. 8 is merely an example of the wireless charging base 9 and does not constitute a limitation of the wireless charging base 9 and may include more or less components than those shown, or combine certain components, or different components, for example, the terminal device may also include input-output devices, network access devices, buses, etc.
The Processor 90 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory 91 may be an internal storage unit of the wireless charging base 9, such as a hard disk or a memory of the wireless charging base 9. The memory 91 may also be an external storage device of the wireless charging base 9, such as a plug-in hard disk provided on the wireless charging base 9, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like. Further, the memory 91 may also include both an internal storage unit of the wireless charging base 9 and an external storage device. The memory 91 is used for storing computer programs and other programs and data required by the terminal device. The memory 91 may also be used to temporarily store data that has been output or is to be output.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules, so as to perform all or part of the functions described above. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus/terminal device and method may be implemented in other ways. For example, the above-described embodiments of the apparatus/terminal device are merely illustrative, and for example, a module or a unit may be divided into only one logical function, and may be implemented in other ways, 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.
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 application 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, and can also be realized in a form of a software functional unit.
The integrated modules/units, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, all or part of the flow in the method of the embodiments described above can be realized by a computer program, which can be stored in a computer readable storage medium and can realize the steps of the embodiments of the methods described above when the computer program is executed by a processor. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer readable medium may include: any entity or device capable of carrying computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like. It should be noted that the computer readable medium may contain other components which may be suitably increased or decreased as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, in accordance with legislation and patent practice, the computer readable medium does not include electrical carrier signals and telecommunications signals.
The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.

Claims (9)

1. A foreign matter detection method is applied to a wireless charging base, the wireless charging base comprises a wireless transmitting module used for transmitting a wireless charging signal, and the foreign matter detection method is characterized by comprising the following steps:
acquiring a working current value of the wireless transmitting module, and judging whether the working current value of the wireless transmitting module is within a preset current value range;
if the working current value of the wireless transmitting module is within a preset current value range, obtaining the working current value of the wireless transmitting module under a plurality of preset wireless transmitting frequencies, and generating a working current value sequence;
matching the working current value array with a preset current value array, and generating a foreign matter detection result of the wireless charging base according to a matching result;
the foreign matter detection result that generates the wireless base that charges according to the matching result includes:
if the working current value array is consistent with a preset current value array, judging that no foreign matter exists on the wireless charging base;
the working current value array is consistent with the preset current value array and comprises the following steps: and the current value curve in the working current value sequence is consistent with the waveform curve of the preset current value sequence.
2. The method for detecting the foreign matter according to claim 1, wherein the step of, if the operation current value sequence matches the preset current value sequence, comprises:
judging whether the wireless transmitting frequency corresponding to the maximum current value in the working current value array is located in a preset frequency threshold interval, if so, judging that the working current value array is matched with the preset current value array consistently;
and/or judging whether the working current value i0 corresponding to the preset transmitting frequency F0 is the maximum current value in the working current sequence, if so, judging that the working current value sequence is matched with the preset current value sequence; wherein the plurality of preset wireless transmission frequencies includes the preset transmission frequency F0.
3. The foreign object detection method according to claim 1, wherein the predetermined current value range includes a first current threshold, and the first current threshold is a lower limit value of the predetermined current value range, and if the operating current value is smaller than the first current threshold, it is determined that the wireless charging base is in an unloaded state.
4. The foreign object detection method according to claim 1, wherein the predetermined current value range includes a second current threshold, and the second current threshold is an upper limit value of the predetermined current value range, and if the operating current value is greater than the second current threshold, it is determined that the wireless charging base is in the foreign object state.
5. The foreign object detection method according to claim 1, wherein if the operating current value sequence is not matched with the preset current value sequence, it is determined that the wireless charging base is in a foreign object state.
6. The foreign object detection method according to claim 4 or 5, further comprising a foreign object processing determination step, the foreign object processing determination step comprising:
acquiring a working current value of the wireless transmitting module;
comparing the working current value with a preset foreign matter treatment current value;
if the working current value is smaller than the foreign matter treatment current value, judging that the wireless charging base is in an idle state;
if the working current value is not less than the foreign matter treatment current value, judging that the wireless charging base is still in a foreign matter state;
and/or when the wireless charging base is in a foreign matter state, the foreign matter processing judgment step is executed once every preset time interval T1.
7. The utility model provides a foreign matter detection device, disposes in wireless charging base, wireless charging base is including the wireless transmitting module who is used for launching wireless signal of charging, its characterized in that, foreign matter detection device includes:
the judging module is used for acquiring the working current value of the wireless transmitting module and judging whether the working current value of the wireless transmitting module is within a preset current value range or not;
the generating module is used for acquiring the working current values of the wireless transmitting module under a plurality of preset wireless transmitting frequencies and generating a working current value sequence if the working current value of the wireless transmitting module is within a preset current value range;
and the matching module is used for matching the working current value sequence with a preset current value sequence, generating a foreign matter detection result of the wireless charging base according to the matching result, and judging that no foreign matter exists on the wireless charging base if a current value curve in the working current value sequence is consistent with a waveform curve of the preset current value sequence.
8. A wireless charging base, comprising: a wireless transmission module, a memory, a processor and a computer program stored in the memory and executable on the processor, the wireless transmission module being configured to transmit a wireless charging signal, wherein the processor implements the steps of the foreign object detection method according to any one of claims 1 to 6 when executing the computer program.
9. A computer storage medium storing a computer program, wherein the computer program when executed by a processor implements the steps of the foreign object detection method according to any one of claims 1 to 6.
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