CN106412293B - Foreign matter detection method and device and terminal equipment - Google Patents
Foreign matter detection method and device and terminal equipment Download PDFInfo
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- 238000001514 detection method Methods 0.000 title claims abstract description 43
- 230000002159 abnormal effect Effects 0.000 claims abstract description 124
- 238000001931 thermography Methods 0.000 claims abstract description 81
- 238000000034 method Methods 0.000 claims abstract description 48
- 230000008859 change Effects 0.000 claims description 10
- 230000008569 process Effects 0.000 abstract description 31
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- 238000010586 diagram Methods 0.000 description 8
- 239000002184 metal Substances 0.000 description 6
- 238000004891 communication Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
- H04M1/724—User interfaces specially adapted for cordless or mobile telephones
- H04M1/72403—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
- H04M1/724—User interfaces specially adapted for cordless or mobile telephones
- H04M1/72448—User interfaces specially adapted for cordless or mobile telephones with means for adapting the functionality of the device according to specific conditions
- H04M1/72454—User interfaces specially adapted for cordless or mobile telephones with means for adapting the functionality of the device according to specific conditions according to context-related or environment-related conditions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
- H04M1/724—User interfaces specially adapted for cordless or mobile telephones
- H04M1/72448—User interfaces specially adapted for cordless or mobile telephones with means for adapting the functionality of the device according to specific conditions
- H04M1/72463—User interfaces specially adapted for cordless or mobile telephones with means for adapting the functionality of the device according to specific conditions to restrict the functionality of the device
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
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Abstract
The embodiment of the invention discloses a foreign matter detection method, a foreign matter detection device and terminal equipment, and is applied to the technical field of electronics. The method provided by the embodiment of the invention comprises the following steps: after a wireless charging function is started, acquiring an infrared thermal imaging image between a wireless power transmitting end and a wireless power receiving end; if an abnormal object exists in the infrared thermal imaging image, judging whether the temperature value of the abnormal object meets a preset rule or not; if the temperature value of the abnormal object meets the preset rule, sending a wireless charging termination instruction to the wireless power transmitting terminal, wherein the wireless charging termination instruction is used for indicating the wireless power transmitting terminal to terminate wireless charging. By implementing the embodiment of the invention, the accuracy of foreign matter detection in the wireless charging process can be improved, and the safety in the wireless charging process is further improved.
Description
Technical Field
The invention relates to the technical field of electronics, in particular to a foreign matter detection method and device and terminal equipment.
Background
With the popularization of terminal devices such as smart phones, a short-range wireless charging technology has been developed to achieve the purpose of charging smart phones at any time and any place. The wireless charging technology transfers electric energy through the coupling of a transmitting coil and a receiving coil, and a wireless charger can be called an electric energy transmitting end, namely TX for short; the mobile phone with the wireless charging function is called an electric energy receiving end, RX for short. When the TX terminal charges the RX terminal, when metal articles such as coins and keys are also placed on the TX terminal transmitting coil, the metal articles can absorb electric energy to generate heat, and a Foreign object detection algorithm (FOD) is introduced for safety and energy saving.
At present, the TX end or the RX end is mainly used to detect the magnetic resistance to determine whether a metal substance exists, and then determine whether to continue wireless charging transmission. However, in practical use, it is found that, because the wireless charging efficiency has a large correlation with the position, a large magnetic resistance exists even when the position is not aligned, when the charging position is slightly deviated, the system is misjudged to exist a metal foreign object, so that charging is unstable, and if a small metal object exists between the TX end and the RX end before charging, the magnetic resistance does not change at all during wireless charging operation, and when a foreign object detection threshold of the system is not reached, the system also judges that no metal foreign object exists, so that the accuracy of foreign object detection is reduced, and further, the potential safety hazard is increased.
Disclosure of Invention
The embodiment of the invention provides a foreign matter detection method, a foreign matter detection device and terminal equipment, which can improve the accuracy of foreign matter detection in a wireless charging process and further improve the safety in the wireless charging process.
The first aspect of the embodiments of the present invention discloses a foreign object detection method, including:
after a wireless charging function is started, acquiring an infrared thermal imaging image between a wireless power transmitting end and a wireless power receiving end;
if an abnormal object exists in the infrared thermal imaging image, judging whether the temperature value of the abnormal object meets a preset rule or not;
if the temperature value of the abnormal object meets the preset rule, sending a wireless charging termination instruction to the wireless power transmitting terminal, wherein the wireless charging termination instruction is used for indicating the wireless power transmitting terminal to terminate wireless charging.
As an optional implementation manner, before the determining, if an abnormal object exists in the infrared thermal imaging image, whether a temperature value of the abnormal object satisfies a preset rule, the method further includes:
comparing the infrared thermal imaging image with a preset image;
and judging whether an abnormal object exists in the infrared thermal imaging image according to the comparison result.
As an optional implementation, the comparing the infrared thermal imaging image with the preset image includes:
acquiring images of a difference part between the infrared thermal imaging image and the preset image;
the judging whether the abnormal object exists in the infrared thermal imaging image according to the comparison result comprises the following steps:
and judging whether an abnormal object exists in the infrared thermal imaging image according to the image of the distinguishing part.
As an optional implementation manner, the determining whether the temperature value of the abnormal object satisfies a preset rule includes:
judging whether the temperature value of the abnormal object exceeds a first preset temperature threshold value or not;
or judging whether the temperature change value of the abnormal object exceeds a second preset threshold value within preset time.
As an optional implementation, the method further comprises:
if no abnormal object exists in the infrared thermal imaging image, or the temperature value of the abnormal object does not meet the preset rule, keeping the charging state between the wireless power transmitting end and the wireless power receiving end, and executing the acquisition of the infrared thermal imaging image between the wireless power transmitting end and the wireless power receiving end.
A second aspect of the embodiments of the present invention discloses a foreign object detection apparatus, including:
the wireless charging device comprises an acquisition unit, a wireless power transmitting terminal and a wireless power receiving terminal, wherein the acquisition unit is used for acquiring an infrared thermal imaging image between the wireless power transmitting terminal and the wireless power receiving terminal after a wireless charging function is started;
the first judgment unit is used for judging whether the temperature value of the abnormal object meets a preset rule or not when the abnormal object exists in the infrared thermal imaging image;
and the sending unit is used for sending a wireless charging termination instruction to the wireless power transmitting terminal when the temperature value of the abnormal object meets the preset rule, wherein the wireless charging termination instruction is used for indicating the wireless power transmitting terminal to terminate wireless charging.
As an optional implementation, the apparatus further comprises:
the comparison unit is used for comparing the infrared thermal imaging image with a preset image;
and the second judging unit is used for judging whether an abnormal object exists in the infrared thermal imaging image according to the comparison result.
As an alternative to the above-described embodiment,
the comparison unit is specifically configured to acquire an image of a difference portion between the infrared thermal imaging image and the preset image, and drive the second determination unit to determine whether an abnormal object exists in the infrared thermal imaging image according to the image of the difference portion.
As an alternative to the above-described embodiment,
the first judging unit is specifically configured to judge whether the temperature value of the abnormal object exceeds a first preset temperature threshold;
or,
the first judging unit is specifically configured to judge whether the temperature change value of the abnormal object exceeds a second preset threshold within a preset time.
As an optional implementation, the apparatus further comprises:
and a charging maintaining unit, configured to maintain a charging state between the wireless power transmitting terminal and the wireless power receiving terminal when no abnormal object exists in the infrared thermal imaging image or a temperature value of the abnormal object does not satisfy the preset rule, and perform the acquiring of the infrared thermal imaging image between the wireless power transmitting terminal and the wireless power receiving terminal.
A third aspect of the embodiments of the present invention discloses a terminal device, including any one of the foreign object detection apparatuses described above.
According to the technical scheme, the embodiment of the invention has the following advantages: the method comprises the steps of determining whether an abnormal object exists or not by acquiring an infrared thermal imaging image between a wireless power transmitting end and a wireless power receiving end in the wireless charging process, and judging whether the temperature value of the abnormal object meets a preset rule or not when the abnormal object exists between the wireless power transmitting end and the wireless power receiving end; and then when the temperature value of the abnormal object meets a preset rule, sending a wireless charging termination instruction to the wireless power transmitting terminal, and terminating the wireless charging process. By implementing the embodiment of the invention, the temperature values of the abnormal object and the abnormal object can be accurately judged through the infrared thermal image, the accuracy of foreign matter detection in the wireless charging process can be improved, and the safety in the wireless charging process is further improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, 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 a foreign object detection method according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart illustrating another method for detecting foreign objects according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a foreign object detection apparatus according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of another foreign object detection apparatus according to an embodiment of the present disclosure;
FIG. 5 is a schematic structural diagram of another foreign object detection apparatus according to an embodiment of the present disclosure;
fig. 6 is a schematic structural diagram of a terminal device disclosed in the embodiment of the present invention;
fig. 7 is a schematic structural diagram of a foreign object detection system according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. 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 invention.
The terms "first" and "second" in the description and claims of the present invention and the above-described drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "comprises" and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
In the embodiment of the present invention, the terminal device may include a terminal device running an Android operating system, an iOS operating system, a Windows operating system, or another operating system, such as a mobile phone, a mobile computer, a tablet computer, a desktop computer, a Personal Digital Assistant (PDA), an intelligent watch, an intelligent glasses, an intelligent bracelet, and the like.
The embodiment of the invention provides a foreign matter detection method, a foreign matter detection device and terminal equipment, which can improve the accuracy of foreign matter detection in a wireless charging process and further improve the safety in the wireless charging process. The following are detailed below.
Referring to fig. 1, fig. 1 is a schematic flow chart of a foreign object detection method according to an embodiment of the present invention. The foreign object detection method shown in fig. 1 may include the following steps:
101: after a wireless charging function is started, acquiring an infrared thermal imaging image between a wireless power transmitting end and a wireless power receiving end;
in the embodiment of the invention, as can be known from introduction of the background art, in the existing wireless charging technology, electric energy is transmitted through coupling of a sending coil and a receiving coil, and a wireless charger can be called an electric energy sending end, which is referred to as TX for short; the mobile phone with the wireless charging function is called an electric energy receiving end, RX for short. During the wireless charging, electric energy is generated between the wireless power transmitting terminal and the wireless power receiving terminal due to a magnetic field effect.
As an alternative implementation, an infrared thermal imaging image between the wireless power transmitting terminal and the wireless power receiving terminal may be acquired by an infrared thermal imaging sensor.
102: if an abnormal object exists in the infrared thermal imaging image, judging whether the temperature value of the abnormal object meets a preset rule or not;
in the embodiment of the present invention, whether an abnormal object exists in the infrared thermal imaging image may be determined by comparing the infrared thermal imaging image with a preset image, where the preset image may be an image captured when an abnormal object does not exist between the wireless power transmitting end and the wireless power receiving end.
In the embodiment of the present invention, determining whether the temperature value of the abnormal object satisfies the preset rule may include the following steps:
judging whether the temperature value of the abnormal object exceeds a first preset temperature threshold value or not;
or, judging whether the temperature change value of the abnormal object exceeds a second preset threshold value within a preset time.
If an abnormal object exists between the wireless power transmitting terminal and the wireless power receiving terminal, the abnormal object absorbs electric energy to generate heat, so that whether the temperature value of the abnormal object exceeds a first preset temperature threshold value or not can be determined through a shot infrared thermal imaging graph, or whether the temperature value of the abnormal object changes rapidly or not is judged, namely whether the temperature change value of the abnormal object exceeds a second preset threshold value within preset time is judged.
103: and if the temperature value of the abnormal object meets the preset rule, sending a wireless charging termination instruction to the wireless power transmitting terminal, wherein the wireless charging termination instruction is used for indicating the wireless power transmitting terminal to terminate wireless charging.
In the embodiment of the invention, if the temperature value of the abnormal body meets the preset rule, the abnormal body is indicated to exist between the wireless power transmitting terminal and the wireless power receiving terminal, and the existence of the abnormal body can cause potential safety hazard, so that a wireless charging termination instruction can be sent to the wireless power transmitting terminal to instruct the wireless power transmitting terminal to terminate wireless charging, and the safety in the charging process can be ensured.
In the method described in fig. 1, it is determined whether there is an abnormal object by acquiring an infrared thermal imaging image between a wireless power transmitting terminal and a wireless power receiving terminal during a wireless charging process, and when there is an abnormal object between the wireless power transmitting terminal and the wireless power receiving terminal, it is determined whether a temperature value of the abnormal object satisfies a preset rule; and then when the temperature value of the abnormal object meets a preset rule, sending a wireless charging termination instruction to the wireless power transmitting terminal, and terminating the wireless charging process. By implementing the embodiment of the invention, the temperature values of the abnormal object and the abnormal object can be accurately judged through the infrared thermal image, the accuracy of foreign matter detection in the wireless charging process can be improved, and the safety in the wireless charging process is further improved.
Further, please refer to fig. 2, fig. 2 is a schematic flow chart of another foreign object detection method according to an embodiment of the present invention. As shown in fig. 2, the method may include the steps of:
201: starting a wireless charging function;
202: acquiring an infrared thermal imaging image between a wireless power transmitting end and a wireless power receiving end;
203: comparing the infrared thermal imaging image with a preset image;
204: judging whether an abnormal object exists in the infrared thermal imaging image according to the comparison result;
as an alternative embodiment, whether an abnormal object exists in the infrared thermal imaging image may be determined by:
acquiring images of a difference part between the infrared thermal imaging image and the preset image;
and judging whether an abnormal object exists in the infrared thermal imaging image according to the image of the distinguishing part.
205: if an abnormal object exists in the infrared thermal imaging image, judging whether the temperature value of the abnormal object meets a preset rule or not;
as an optional implementation manner, the determining whether the temperature value of the abnormal object meets the preset rule may include the following steps:
judging whether the temperature value of the abnormal object exceeds a first preset temperature threshold value or not;
or, judging whether the temperature change value of the abnormal object exceeds a second preset threshold value within a preset time.
Wherein the temperature value of the abnormal object can be determined by the temperature field of the object surface reflected in the infrared thermal imaging image.
206: if the temperature value of the abnormal object meets the preset rule, sending a wireless charging termination instruction to the wireless power transmitting terminal, wherein the wireless charging termination instruction is used for indicating the wireless power transmitting terminal to terminate wireless charging;
207: if there is no abnormal object in the infrared thermography image, or the temperature value of the abnormal object does not satisfy the preset rule, the charging state between the wireless power transmitting terminal and the wireless power receiving terminal is maintained, and step 202 is executed.
In the embodiment of the present invention, if there is no abnormal object in the infrared thermal imaging image, or the temperature value of the abnormal object does not satisfy the preset rule, the normal charging state between the wireless power transmitting end and the wireless power receiving end is maintained, and the step of obtaining the infrared thermal imaging image between the wireless power transmitting end and the wireless power receiving end in step 202 is continuously performed, so as to monitor whether there is an abnormal object between the wireless power transmitting end and the wireless power receiving end in real time.
In the method described in fig. 2, it is determined whether there is an abnormal object by acquiring an infrared thermal imaging image between the wireless power transmitting terminal and the wireless power receiving terminal during the wireless charging process, and when there is an abnormal object between the wireless power transmitting terminal and the wireless power receiving terminal, it is determined whether a temperature value of the abnormal object satisfies a preset rule; and then when the temperature value of the abnormal object meets a preset rule, sending a wireless charging termination instruction to the wireless power transmitting terminal, and terminating the wireless charging process. The temperature value of the abnormal object and the abnormal object can be accurately judged through the infrared thermal image, the accuracy of foreign matter detection in the wireless charging process can be improved, and the safety in the wireless charging process is further improved. Further, when no abnormal object exists in the infrared thermal imaging image, or the temperature value of the abnormal object does not meet the preset rule, the normal charging state between the wireless power transmitting terminal and the wireless power receiving terminal is maintained, the acquisition of the infrared thermal imaging image between the wireless power transmitting terminal and the wireless power receiving terminal is continuously performed, and the wireless charging process is monitored in real time.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a foreign object detection apparatus according to an embodiment of the present invention. As shown in fig. 3, the apparatus may include:
the acquiring unit 301 is configured to acquire an infrared thermal imaging image between the wireless power transmitting end and the wireless power receiving end after the wireless charging function is started;
a first determining unit 302, configured to determine whether a temperature value of an abnormal object in the infrared thermal imaging image satisfies a preset rule when the abnormal object exists;
a sending unit 303, configured to send a wireless charging termination instruction to the wireless power transmitting terminal when the temperature value of the abnormal object meets the preset rule, where the wireless charging termination instruction is used to instruct the wireless power transmitting terminal to terminate wireless charging.
In the embodiment of the present invention, the detailed implementation of each functional unit may refer to the description in method embodiment 1, and the embodiment of the present invention will not be repeated.
In the embodiment of the present invention, an infrared thermal imaging image between a wireless power transmitting end and a wireless power receiving end is acquired by an acquiring unit 301 in a wireless charging process, and when an abnormal object exists between the wireless power transmitting end and the wireless power receiving end, a first determining unit 302 determines whether a temperature value of the abnormal object satisfies a preset rule; when the temperature value of the abnormal object meets the preset rule, the sending unit 303 sends a wireless charging termination instruction to the wireless power transmitting terminal, so as to terminate the wireless charging process. The accuracy of foreign matter detection in the wireless charging process can be improved, and the safety in the wireless charging process is further improved.
Referring to fig. 4, fig. 4 is a schematic structural diagram of another foreign object detection apparatus according to an embodiment of the present invention. Wherein, the apparatus shown in fig. 4 is optimized by the apparatus shown in fig. 3, and compared with the apparatus shown in fig. 3, the apparatus shown in fig. 4 further includes:
a comparison unit 304, configured to compare the infrared thermal imaging image with a preset image;
a second determining unit 305, configured to determine whether an abnormal object exists in the infrared thermal imaging image according to the comparison result.
As an alternative embodiment, the comparing unit 304 is specifically configured to acquire an image of a difference portion between the infrared thermographic image and the preset image, and drive the second determining unit 305 to determine whether an abnormal object exists in the infrared thermographic image according to the image of the difference portion.
As an alternative implementation manner, in the apparatus shown in fig. 4, the first determining unit 302 is specifically configured to determine whether the temperature value of the abnormal object exceeds a first preset temperature threshold;
or,
the first determining unit 302 is specifically configured to determine whether a temperature variation value of the abnormal object exceeds a second preset threshold within a preset time.
Alternatively, in the foreign object detection apparatus shown in fig. 4, the apparatus further includes:
a charging maintaining unit 306, configured to maintain a charging state between the wireless power transmitting terminal and the wireless power receiving terminal when no abnormal object exists in the infrared thermal imaging image or a temperature value of the abnormal object does not satisfy the preset rule, and drive the obtaining unit 301 to perform obtaining of the infrared thermal imaging image between the wireless power transmitting terminal and the wireless power receiving terminal.
Referring to fig. 5, another foreign object detection apparatus is provided, which has a wireless communication function, such as radio frequency, bluetooth or infrared communication function. The device comprises a processor 501, a memory 502 and an infrared camera 503.
The processor 501 executes the program code pre-stored in the memory 502 to perform the following steps:
after the wireless charging function is started, an infrared thermal imaging image between the wireless power transmitting end and the wireless power receiving end is acquired through the infrared camera 503;
if an abnormal object exists in the infrared thermal imaging image, judging whether the temperature value of the abnormal object meets a preset rule or not;
and if the temperature value of the abnormal object meets the preset rule, sending a wireless charging termination instruction to the wireless power transmitting terminal, wherein the wireless charging termination instruction is used for indicating the wireless power transmitting terminal to terminate wireless charging.
As an alternative embodiment, the processor 501 executes the program code pre-stored in the memory 502, and before determining whether the temperature value of the abnormal object satisfies a preset rule if the abnormal object exists in the infrared thermal imaging image, is further configured to:
comparing the infrared thermal imaging image with a preset image;
and judging whether an abnormal object exists in the infrared thermal imaging image according to the comparison result.
As an optional implementation manner, the processor 501 executes a program code pre-stored in the memory 502, and compares the infrared thermal imaging image with a preset image, to specifically perform the following operations:
acquiring images of a difference part between the infrared thermal imaging image and the preset image;
the determining, according to the comparison result, whether an abnormal object exists in the infrared thermal imaging image is specifically configured to perform the following operations:
and judging whether an abnormal object exists in the infrared thermal imaging image according to the image of the distinguishing part.
As an optional implementation manner, the processor 501 executes a program code pre-stored in the memory 502, and determines whether the temperature value of the abnormal object meets a preset rule, specifically to perform the following operations:
judging whether the temperature value of the abnormal object exceeds a first preset temperature threshold value or not;
or, judging whether the temperature change value of the abnormal object exceeds a second preset threshold value within a preset time.
As an alternative embodiment, the processor 501 executes the program code pre-stored in the memory 502, and is further configured to:
if no abnormal object exists in the infrared thermal imaging image, or the temperature value of the abnormal object does not meet the preset rule, the charging state between the wireless power transmitting terminal and the wireless power receiving terminal is kept, and the acquisition of the infrared thermal imaging image between the wireless power transmitting terminal and the wireless power receiving terminal is executed.
Referring to fig. 6, fig. 6 is a schematic structural diagram of a terminal device according to an embodiment of the present invention, and as shown in fig. 6, the terminal device may include: fig. 3 to 5 show a foreign object detection device 601, a processor unit 602, a storage unit 603, and the like. These components communicate over one or more buses. It will be understood by those skilled in the art that the configuration of the terminal device shown in fig. 6 is not intended to limit the present invention, and may be a bus-type configuration, a star-type configuration, a configuration including more or less components than those shown in fig. 6, a combination of certain components, or a different arrangement of components. In the embodiment of the present invention, the terminal device shown in fig. 6 includes, but is not limited to, various terminal devices such as a mobile phone, a mobile computer, a tablet computer, and a Personal Digital Assistant (PDA).
The processor unit 602 is a control center of the terminal device, connects various parts of the entire terminal device using various interfaces and lines, and executes various functions of the terminal device and/or processes data by operating or executing program codes and/or modules stored in the storage unit 603 and calling data stored in the storage unit 603. The processor unit 602 may be composed of an Integrated Circuit (IC), for example, a single packaged IC, or a plurality of packaged ICs connected with the same or different functions. For example, the processor Unit 602 may include only a Central Processing Unit (CPU), or may be a combination of a CPU, a Digital Signal Processor (DSP), a Graphics Processing Unit (GPU), and a control chip (e.g. a baseband chip) in the communication Unit. In the embodiment of the present invention, the CPU may be a single operation core, or may include multiple operation cores.
The storage unit 603 may be used to store program codes and modules, and the processor unit 602 executes various functional applications of the terminal device and implements data processing by executing the program codes and modules stored in the storage unit 603. The storage unit 603 mainly includes a program storage area and a data storage area, wherein the program storage area can store an operating system, and program codes required for at least one function; the data storage area may store data (such as audio data, a phonebook, etc.) created according to the use of the terminal device, and the like. In an embodiment of the invention, the Memory unit 603 may include a volatile Memory, such as a Nonvolatile dynamic random access Memory (NVRAM), a Phase Change random access Memory (PRAM), a Magnetoresistive Random Access Memory (MRAM), and the like, and may further include a Nonvolatile Memory, such as at least one magnetic disk Memory device, an Electrically Erasable programmable read-only Memory (EEPROM), a flash Memory device, such as a flash Memory (NOR) or a flash Memory (NAND) or a flash Memory. The non-volatile memory stores an operating system and program codes executed by the processor unit 602. The processor unit 602 loads operating programs and data from the non-volatile memory into the memory and stores the digital content in the mass storage device. The operating system includes various components and/or drivers for controlling and managing conventional system tasks, such as memory management, storage device control, power management, etc., as well as facilitating communication between various hardware and software components. In the embodiment of the present invention, the operating system may be an Android system developed by Google, an iOS system developed by Apple, a Windows operating system developed by Microsoft, or an embedded operating system such as Vxworks.
Wherein the processor unit 602 executes the program code pre-stored in the storage unit 603 for controlling the foreign object detection apparatus 601 to execute the steps in the above method embodiments, and the processor unit 602 is further configured to receive the wireless charging termination signal fed back by the foreign object detection apparatus 601 to terminate the wireless charging process.
It should be noted that, the terminal device shown in fig. 6 only indicates components required by the terminal device for executing the foreign object detection method disclosed in the embodiment of the present invention, and the embodiment of the present invention is not indicated for other components that the terminal device can have, because this does not affect the implementation of the embodiment of the present invention.
The embodiment of the present invention further provides a foreign object detection system, as shown in fig. 7, including a wireless transmitting module 701, an image processing module 702, a transmitting coil 703 and an infrared camera 704. The transmitting coil 703 is used for transmitting energy or receiving energy in a wireless charging process, the infrared camera 704 is located in a hollow position of the transmitting coil 703 and is used for acquiring an infrared thermal imaging image between the wireless power transmitting end and the wireless power receiving end, the image processing module 702 is used for processing the infrared thermal imaging image, judging whether an abnormal object exists between the wireless power transmitting end and the wireless power receiving end, and transmitting an instruction through the wireless transmitting module 701 according to a judgment result to terminate the wireless charging process or maintain the wireless charging process.
It should be noted that, in the embodiment of the foreign object detection apparatus and the terminal device, the included units are only divided according to functional logic, but are not limited to the above division as long as the corresponding functions can be realized; in addition, specific names of the functional units are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present invention.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In addition, it is understood by those skilled in the art that all or part of the steps in the above method embodiments may be implemented by related hardware, and the corresponding program may be stored in a computer readable storage medium, where the above mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the embodiment of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. A foreign object detection method, comprising:
after a wireless charging function is started, acquiring an infrared thermal imaging image between a wireless power transmitting end and a wireless power receiving end;
comparing the infrared thermal imaging image with a preset image, wherein the preset image is a picture shot when no abnormal object exists between the wireless power transmitting end and the wireless power receiving end;
judging whether an abnormal object exists in the infrared thermal imaging image according to the comparison result;
if an abnormal object exists in the infrared thermal imaging image, judging whether the temperature value of the abnormal object meets a preset rule or not;
if the temperature value of the abnormal object meets the preset rule, sending a wireless charging termination instruction to the wireless power transmitting terminal, wherein the wireless charging termination instruction is used for indicating the wireless power transmitting terminal to terminate wireless charging.
2. The method of claim 1, wherein comparing the infrared thermographic image to a predetermined image comprises:
acquiring images of a difference part between the infrared thermal imaging image and the preset image;
the judging whether the abnormal object exists in the infrared thermal imaging image according to the comparison result comprises the following steps:
and judging whether an abnormal object exists in the infrared thermal imaging image according to the image of the distinguishing part.
3. The method according to claim 1, wherein the determining whether the temperature value of the abnormal object satisfies a preset rule comprises:
judging whether the temperature value of the abnormal object exceeds a first preset temperature threshold value or not;
or judging whether the temperature change value of the abnormal object exceeds a second preset threshold value within preset time.
4. A method according to any one of claims 1 to 3, characterized in that the method further comprises:
if no abnormal object exists in the infrared thermal imaging image, or the temperature value of the abnormal object does not meet the preset rule, keeping the charging state between the wireless power transmitting end and the wireless power receiving end, and executing the acquisition of the infrared thermal imaging image between the wireless power transmitting end and the wireless power receiving end.
5. A foreign matter detection device, characterized by comprising:
the wireless charging device comprises an acquisition unit, a wireless power transmitting terminal and a wireless power receiving terminal, wherein the acquisition unit is used for acquiring an infrared thermal imaging image between the wireless power transmitting terminal and the wireless power receiving terminal after a wireless charging function is started;
a comparison unit, configured to compare the infrared thermal imaging image with a preset image, where the preset image is a picture that is taken when there is no abnormal object between the wireless power transmitting end and the wireless power receiving end;
the first judging unit is used for judging whether an abnormal object exists in the infrared thermal imaging image according to the comparison result and judging whether the temperature value of the abnormal object meets a preset rule or not when the abnormal object exists in the infrared thermal imaging image;
and the sending unit is used for sending a wireless charging termination instruction to the wireless power transmitting terminal when the temperature value of the abnormal object meets the preset rule, wherein the wireless charging termination instruction is used for indicating the wireless power transmitting terminal to terminate wireless charging.
6. The apparatus of claim 5,
the comparison unit is specifically configured to acquire an image of a difference portion between the infrared thermal imaging image and the preset image, and drive the second determination unit to determine whether an abnormal object exists in the infrared thermal imaging image according to the image of the difference portion.
7. The apparatus of claim 5,
the first judging unit is specifically configured to judge whether the temperature value of the abnormal object exceeds a first preset temperature threshold;
or,
the first judging unit is specifically configured to judge whether the temperature change value of the abnormal object exceeds a second preset threshold within a preset time.
8. The apparatus of any one of claims 5 to 7, further comprising:
and a charging maintaining unit, configured to maintain a charging state between the wireless power transmitting terminal and the wireless power receiving terminal when no abnormal object exists in the infrared thermal imaging image or a temperature value of the abnormal object does not satisfy the preset rule, and perform the acquiring of the infrared thermal imaging image between the wireless power transmitting terminal and the wireless power receiving terminal.
9. A terminal device, characterized in that the terminal device comprises the foreign matter detection apparatus according to any one of claims 5 to 8.
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| CN107036241A (en) * | 2017-04-21 | 2017-08-11 | 珠海格力电器股份有限公司 | Detection method and device for harmful animals and kitchen air conditioner |
| CN107994687B (en) * | 2017-11-27 | 2021-05-25 | 江苏傲能科技有限公司 | Foreign object detection system and method |
| CN107947381A (en) * | 2017-12-05 | 2018-04-20 | 无锡市瀚为科技有限公司 | A kind of wireless charging detection device for foreign matter and foreign matter detecting method |
| CN113858981A (en) * | 2020-06-30 | 2021-12-31 | 北京新能源汽车股份有限公司 | Wireless charging control method, vehicle-mounted remote information processing system and intelligent terminal |
| CN113260882B (en) * | 2020-07-20 | 2024-03-12 | 深圳大学 | Metal foreign matter detection method and device and terminal equipment |
| CN112255494A (en) * | 2020-09-08 | 2021-01-22 | 深圳供电局有限公司 | Obstacle clearing method and device for power equipment and thermal image monitoring device |
| CN113013998A (en) * | 2021-02-20 | 2021-06-22 | 京东数科海益信息科技有限公司 | Wireless charging control method and device, wireless charging pile, equipment and storage medium |
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| KR20120102446A (en) * | 2011-03-08 | 2012-09-18 | 삼성전자주식회사 | Mobile terminal, method for controlling wireless charge thereof, and wireless charging system thereof |
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