A wireless charging foreign object temperature detection system and detection method

Abstract

The present invention provides a wireless charging foreign object temperature detection system and method, comprising: a wireless transmitter, a foreign object sample equipped with a temperature sensor, a control device, a scanning device, and a driving device. The wireless transmitter includes a first coil; the control device is configured to: obtain coil area information detected by the scanning device, the coil area information being the position distribution information of the coil area; set a detection point within the coil area based on the coil area information; control the wireless transmitter to activate maximum transmission power, and control the driving device to move the foreign object sample to the detection point; obtain temperature data detected by the temperature sensor on the foreign object sample at the detection point, and save the mapping relationship between the type of the foreign object sample, the location information of the detection point, and the temperature data. The present invention can improve the detection accuracy and efficiency of wireless charging foreign object temperature.

Description

Technical Field

[0001] The present application relates to the field of wireless charging, and in particular to a wireless charging foreign object temperature detection system and detection method. Background Art

[0002] Wireless charging technology uses a first coil in a wireless transmitter to generate alternating current, which, through electromagnetic induction, generates a current in a second coil in a wireless receiver, thereby transferring electrical energy from the transmitter to the receiver. If a metallic foreign object is present between the transmitter and receiver while the transmitter is transmitting power, eddy currents will be generated within the object. The Joule effect of these eddy currents within the magnetic field will heat the object, potentially posing a safety hazard. For example, the hot metal object could burn the object, the transmitter, or the receiver, or even cause the receiver to explode due to battery overheating.

[0003] To ensure the safety of wireless charging technology, wireless transmitters must be pre-tested for foreign object temperature. Relevant safety standards require the use of foreign object samples made of different metal materials. The temperature of the foreign object samples at different locations on the wireless transmitter must be measured in various test scenarios, including the absence of a receiver, direct contact between the receiver and the foreign object sample, and a preset distance between the receiver and the foreign object sample. If the highest temperature of the foreign object sample does not exceed the temperature rise limit, the safety standard is met.

[0004] Testers manually construct and switch test scenarios, randomly moving the foreign object sample across the wireless transmitter in each scenario to find the point of maximum temperature rise. This method relies on the tester's experience and technique, is cumbersome, and results in low efficiency and accuracy in wireless charging foreign object temperature detection, and makes accurate retesting impossible. Summary of the Invention

[0005] The embodiments of the present application provide a wireless charging foreign object temperature detection system and detection method, which realize automatic control of the foreign object temperature detection process, improve detection efficiency and detection accuracy, and can achieve accurate retesting.

[0006] In a first aspect, an embodiment of the present application provides a wireless charging foreign object temperature detection system, comprising: a wireless transmitter, a foreign object sample equipped with a temperature sensor, a control device, a scanning device, and a driving device; wherein the wireless transmitter includes a first coil; the control device is configured to: obtain coil area information detected by the scanning device, the coil area information being position distribution information of the coil area, the coil area being the projection area of ​​the first coil on a first surface, the first surface being the contact surface of the wireless transmitter with the foreign object sample; set a detection point within the coil area based on the coil area information; control the wireless transmitter to activate maximum transmission power, and control the driving device to move the foreign object sample to the detection point; obtain temperature data detected by the temperature sensor on the foreign object sample at the detection point, and store a mapping relationship between the type of the foreign object sample, the location information of the detection point, and the temperature data. In this way, the control device uses the coil area information as a reference to set the detection points, so that all the detection points are located within the coil area, and filter out invalid points outside the coil area, thereby improving the efficiency of foreign object temperature detection. In addition, the control device controls the driving device to move the foreign body sample to the designated point to be detected based on the position information of the point to be detected, thereby realizing automatic and precise positioning of the foreign body sample, making the mapping relationship between the type of stored foreign body sample, the position information of the point to be detected and the temperature data accurate and reliable, thereby improving the detection accuracy and efficiency of the wireless charging foreign body temperature detection system.

[0007] In some implementations, the system further includes: a wireless receiver; the control device is further configured to: before controlling the driving device to move the foreign object sample to the point to be detected, control the driving device to move the wireless receiver to a target detection position; wherein the target detection position is located in the projection area of ​​the first surface, and after the foreign object sample is moved to the point to be detected, a target distance exists between the wireless receiver and the foreign object sample; and save a mapping relationship between the type of foreign object sample, the target distance, the position information of the point to be detected, and the temperature data. In this way, it is possible to determine whether the wireless receiver participates in the test according to different detection scenario requirements, and the control device controls the driving device to adjust the distance between the wireless receiver and the foreign object sample, thereby achieving automatic and precise positioning of the wireless receiver, making the saved mapping relationship between the type of foreign object sample, the target distance, the position information of the detection point, and the temperature data accurate and reliable, thereby improving the detection accuracy and detection efficiency of the wireless charging foreign object temperature detection system.

[0008] In some implementations, the driving device includes a first motor, a lifting rod, a first sliding component and a first bracket; the first bracket includes a first support rod and a support frame; the lifting rod is parallel to the Z-axis direction, and the Z-axis is a coordinate axis perpendicular to the first surface; the first motor is connected to the fixed end of the lifting rod, the movable end of the lifting rod is vertically connected to the first support rod through the first sliding component, and the support frame is connected to the end of the first support rod away from the first sliding component; the control device is also used to: before obtaining the coil area information, control the driving device to place the scanning device on the support frame and align the support frame with the first surface; by controlling the operating state of the first motor, adjust the length of the lifting rod to drive the first sliding component and the first bracket to move along the Z-axis direction, so that the scanning device moves to a preset scanning height in the Z-axis direction; when the scanning device moves to the preset scanning height, turn on the scanning device; after receiving the coil area information sent by the scanning device, turn off the scanning device, and control the driving device to remove the scanning device from the support frame. In this way, the control device can control the driving device to move the scanning device to the target scanning height in the Z-axis direction, so that the scanning device can accurately detect the coil area information of the wireless transmitter, thereby providing an accurate reference for the control device to set the point to be detected, and the control device can control the start and stop of the scanning device, as well as control the positioning and removal of the scanning device on the support frame, thereby improving the detection accuracy and detection efficiency of the wireless charging foreign object temperature detection system.

[0009] In some implementations, the driving device also includes a second motor, a second connecting rod, a second sliding component and a second support rod; the second connecting rod is parallel to the X-axis direction, and the second support rod is parallel to the Y-axis direction. The X-axis and Y-axis are mutually perpendicular coordinate axes set in the detection plane, and the detection plane is the plane where the wireless transmitter is placed; the second motor is connected to the fixed end of the second connecting rod, and the movable end of the second connecting rod is connected to the second support rod through the second sliding component; the end of the second support rod away from the second sliding component is detachably connected to the foreign matter sample; the control device is used to control the driving device to move the foreign matter sample to the point to be detected, specifically including: controlling the driving device to place the foreign matter sample on the first surface; by controlling the operating state of the second motor, adjusting the telescopic state of the second connecting rod, so as to drive the second sliding component and the second support rod to move along the X-axis direction, so that the foreign matter sample moves to the position corresponding to the X-axis coordinate of the current point to be detected. In this way, the control device can control the driving device to adjust the X-axis coordinate of the foreign matter sample on the first surface, so that the foreign matter sample moves to the position corresponding to the X-axis coordinate of the current point to be detected, thereby realizing automatic and precise positioning of the foreign matter sample in the X-axis direction, thereby improving the detection accuracy and detection efficiency of the wireless charging foreign matter temperature detection system.

[0010] In some implementations, the drive device further includes a third motor, a third connecting rod, a third sliding member, and a third support rod; the third connecting rod is parallel to the Y-axis direction, and the third support rod is parallel to the X-axis direction; the third motor is connected to the fixed end of the third connecting rod, the movable end of the third connecting rod is connected to the third support rod via the third sliding member, and the end of the third support rod away from the third sliding member is detachably connected to the foreign object sample; the control device is used to control the drive device to move the foreign object sample to the point to be detected, and further includes: by controlling the operating state of the third motor, adjusting the telescopic state of the third connecting rod, so as to drive the third sliding member and the third support rod to move along the Y-axis direction, so that the foreign object sample moves to the position corresponding to the Y-axis coordinate of the current point to be detected. In this way, the control device can control the drive device to adjust the Y-axis coordinate of the foreign object sample on the first surface, so that the foreign object sample moves to the position corresponding to the Y-axis coordinate of the current point to be detected, thereby achieving automatic and precise positioning of the foreign object sample in the Y-axis direction, thereby improving the detection accuracy and detection efficiency of the wireless charging foreign object temperature detection system.

[0011] In some implementations, the control device is further configured to obtain temperature data corresponding to the current point to be detected, as detected by the temperature sensor, when the foreign object sample moves to a position corresponding to the X-axis and Y-axis coordinates of the current point to be detected. In this way, the control device obtains temperature data detected by the temperature sensor after the foreign object sample moves to the position corresponding to the current point to be detected, making the mapping relationship between the temperature data and the position coordinates of the current point to be detected more accurate, thereby improving the detection accuracy of the wireless charging foreign object temperature detection system.

[0012] In some implementations, the control device is used to control the drive device to move the wireless receiver to a target detection position, specifically including: controlling the drive device to place the wireless receiver on the support frame and aligning the support frame with the first surface; adjusting the length of the lifting rod by controlling the operating state of the first motor to drive the first sliding component and the first bracket to move along the Z-axis direction, so that the support frame moves to the target detection height in the Z-axis direction; wherein the target detection height is calculated based on the thickness of the wireless transmitter, the thickness of the foreign object sample, the thickness of the support frame, and the target spacing; when the support frame moves to the target detection height, controlling the drive device to move the foreign object sample to the point to be detected. In this way, the control device can control the drive device to move the support frame to the target detection height so that there is a target spacing between the wireless receiver and the foreign object sample, meeting the requirements of different detection scenarios, and realizing automatic and precise positioning of the wireless receiver, so that the mapping relationship between the stored foreign object sample type, target spacing, detection point location information and temperature data is accurate and reliable, thereby improving the detection accuracy and detection efficiency of the wireless charging foreign object temperature detection system.

[0013] In some implementations, the first sliding member includes a first positioning device for detecting the Z-axis coordinate of the first sliding member. The control device is further configured to: after the first sliding member begins to move along the Z-axis, obtain the Z-axis coordinate of the first sliding member detected by the first positioning device when the first sliding member stops moving; and perform height correction on the support frame based on the deviation between the target detection height and the Z-axis coordinate of the first sliding member. Thus, the support frame height is verified by comparing the Z-axis coordinate of the first sliding member detected by the first positioning device with the target detection height. If there is no deviation between the two, it indicates that the support frame is accurately positioned. If there is a deviation between the Z-axis coordinate of the first sliding member and the target detection height, it indicates that the support frame has not reached the target detection height. The control device can correct the height of the support frame based on the deviation between the two, thereby ensuring that the distance between the wireless receiver and the foreign object sample is equal to the target distance. This ensures that the mapping relationship between the type of foreign object sample, the target distance, the location information of the detection point, and the temperature data is accurate and reliable, thereby improving the detection accuracy and detection efficiency of the wireless charging foreign object temperature detection system.

[0014] In some implementations, the second sliding member includes a second positioning device for detecting an X-axis coordinate of the second sliding member, and the third sliding member includes a third positioning device for detecting a Y-axis coordinate of the third sliding member. The control device is further configured to: after the second sliding member begins to move along the X-axis direction, obtain the X-axis coordinate of the second sliding member detected by the second positioning device when the second sliding member stops moving; after the third sliding member begins to move along the Y-axis direction, obtain the Y-axis coordinate of the third sliding member detected by the third positioning device when the third sliding member stops moving; and perform position correction on the foreign matter sample based on a deviation between the X-axis coordinate of the current point to be detected and the X-axis coordinate of the second sliding member, and / or a deviation between the Y-axis coordinate of the current point to be detected and the Y-axis coordinate of the third sliding member. In this way, the current position of the foreign matter sample on the first surface can be determined based on the X-axis coordinate of the second sliding member and the Y-axis coordinate of the third sliding member. By comparing the current position coordinate of the foreign matter sample with the coordinate of the current point to be detected, it can be detected whether the foreign matter sample has moved to the current point to be detected. If at least one of the current X-axis coordinates and Y-axis coordinates of the foreign object sample does not match the current point to be detected, the position of the foreign object sample is corrected to make the mapping relationship between the type of stored foreign object sample (including or excluding the target distance), the position coordinates of the detection point and the temperature data accurate and reliable, thereby improving the detection accuracy and efficiency of the wireless charging foreign object temperature detection system.

[0015] In some implementations, the driving device may further include a fourth motor, a rotating component, a fifth motor and a fourth connecting rod; the central axis of the rotating component is parallel to the Z-axis direction and is arranged at the fixed end of the lifting rod; the fourth motor is connected to the rotating component; the fourth connecting rod is perpendicular to the central axis of the rotating component, the fixed end of the fourth connecting rod is connected to the rotating component, and the movable end of the fourth connecting rod is detachably connected to the foreign matter sample; the fifth motor is connected to the fourth connecting rod; the control device is used to control the driving device to move the foreign matter sample to the point to be detected, specifically including: controlling the driving device to place the foreign matter sample on the first surface; calculating the target length and target angle of the fourth connecting rod relative to the X-axis direction based on the X-axis coordinate and Y-axis coordinate of the current point to be detected; by controlling the operating state of the fourth motor, driving the rotating component to rotate around the Z-axis direction so that the angle between the fourth connecting rod and the X-axis is equal to the target angle; by controlling the operating state of the fifth motor, adjusting the length of the fourth connecting rod to the target length; when the angle between the fourth connecting rod and the X-axis is equal to the target angle and the length of the fourth connecting rod is adjusted to the target length, obtaining temperature data corresponding to the current point to be detected detected by the temperature sensor. In this way, the control device can match the target length of the fourth link and the target angle relative to the X-axis direction according to the current coordinates to be detected, and by rotating and extending the fourth link, the foreign body sample connected to the fourth link can be accurately moved to the current point to be detected, thereby achieving precise movement and positioning of the foreign body sample, and making the mapping relationship between the type of stored foreign body samples (including or excluding the target spacing), the position coordinates of the detection point and the temperature data accurate and reliable, thereby improving the detection accuracy and detection efficiency of the wireless charging foreign body temperature detection system.

[0016] In some implementations, the control device is also used to: detect whether the temperature of the foreign body sample remains unchanged within a preset time period based on the temperature data of the current point to be detected; if the temperature of the foreign body sample does not remain unchanged within the preset time period, continue to obtain the temperature data detected by the temperature sensor at the current point to be detected; if the temperature of the foreign body sample remains unchanged within the preset time period, control the drive device to move the foreign body sample to the next point to be detected of the current point to be detected. In this way, the control device monitors the change pattern of the temperature data of the foreign body sample to detect whether the temperature of the foreign body sample remains unchanged within the preset time period. If the temperature of the foreign body sample remains unchanged within the preset time period, it means that the temperature of the foreign body sample at the current point to be detected has stabilized, and the foreign body temperature detection at the current detection point is completed. The drive device can be controlled to move the foreign body sample to the next point to be detected, thereby avoiding the foreign body sample from staying at the point to be detected for too long, thereby improving the detection efficiency of the wireless charging foreign body temperature detection system.

[0017] In some implementations, the control device is further configured to: before controlling the driving device to move the foreign object sample to the next detection point after the current detection point, if the temperature of the foreign object sample remains unchanged for a preset time period, control the wireless transmitter to reduce the transmission power or turn off the wireless transmitter, and control a timer to start timing; and when the timer detects that the timer reaches a preset time threshold, control the driving device to move the foreign object sample to the next detection point and control the wireless transmitter to transmit at maximum transmission power. Because the temperature rise characteristics of foreign objects at different detection points vary, to ensure detection accuracy, the foreign object sample can be cooled before moving the foreign object sample to the next detection point. When the control device detects that the temperature of the foreign object sample remains unchanged for a preset time period, it controls the wireless transmitter to reduce the transmission power or turn off the wireless transmitter, and uses a timing method to rapidly cool the foreign object sample within the preset time threshold. The foreign object sample is then moved to the next detection point and the temperature data at the next detection point is measured. This ensures the accuracy of the temperature data when the foreign object sample switches to the detection point, thereby improving the detection accuracy of the wireless charging foreign object temperature detection system.

[0018] In some implementations, the control device is further configured to: before controlling the driving device to move the foreign body sample to the next point to be detected after the current point to be detected, if it is detected that the temperature of the foreign body sample remains unchanged for a preset time period, control the wireless transmitter to reduce the transmission power or turn off the wireless transmitter; when it is detected that the temperature of the foreign body sample drops to a preset temperature, or when it is detected that the temperature drop of the foreign body sample reaches a preset ratio, control the driving device to move the foreign body sample to the next point to be detected, and control the wireless transmitter to transmit at maximum transmission power. In this way, before moving the foreign body sample to the next point to be detected, the foreign body sample can be lowered to a preset temperature (e.g., room temperature), or the temperature drop of the foreign body sample reaches a preset ratio, thereby ensuring the accuracy of the temperature data when the foreign body sample switches to the point to be detected, thereby improving the detection accuracy of the wireless charging foreign body temperature detection system.

[0019] In some implementations, the wireless transmitter also includes a protective device located within the coverage area of ​​the first coil and configured to reduce the transmission power of the wireless transmitter upon detecting the presence of a metal foreign object within the protection area, the protection area being the projection of the protective device onto the first surface. The control device is further configured to, after the scanning device is turned on, receive coil area information and protection area information transmitted by the scanning device, the protection area information being information about the location distribution of the protection area on the first surface. Thus, the provision of a protective device within the wireless transmitter can prevent high-temperature burns to the wireless transmitter, foreign object sample, and wireless receiver. The scanning device can also detect the protection area information, thereby providing a reference for classifying the points to be inspected.

[0020] In some implementations, the control device is further configured to: after setting a point to be detected within the coil area, obtain a first point to be detected located outside the protection area and a second point to be detected located inside the protection area according to the protection area information; set a first path for the movement of the foreign matter sample according to the first point to be detected, and set a second path for the movement of the foreign matter sample according to the second point to be detected; control the driving device to cool the foreign matter sample before switching the first point to be detected where the foreign matter sample is located within the first path; and control the driving device not to cool the foreign matter sample before switching the second point to be detected where the foreign matter sample is located within the second path. In the same detection scenario, the control device can control the switching of the point to be detected where the foreign matter sample is located according to the first path and the second path, respectively, and only implement a cooling strategy on the foreign matter sample before switching the first point to be detected under the first path. There is no need to implement a cooling strategy on the foreign matter sample throughout the second path, thereby reducing the cooling time consumed by traversing all points to be detected and improving the efficiency of foreign matter temperature detection.

[0021] In a second aspect, embodiments of the present application provide a wireless charging foreign object temperature detection system, applicable to the wireless charging foreign object temperature detection system of the above-mentioned aspects and various implementations thereof, the method comprising: obtaining coil area information detected by a scanning device, the coil area information being position distribution information of the coil area, the coil area being the projection area of ​​a first coil on a first surface, the first surface being the contact surface of a wireless transmitter with a foreign object sample; setting a detection point within the coil area based on the coil area information; controlling the wireless transmitter to activate maximum transmission power and controlling a driving device to move the foreign object sample to the detection point; obtaining temperature data detected by a temperature sensor on the foreign object sample at the detection point, and storing a mapping relationship between the type of the foreign object sample, the location information of the detection point, and the temperature data. In this way, the control device uses the coil area information as a reference to set the detection points, so that all the detection points are located within the coil area, and invalid points outside the coil area are filtered out, thereby improving the efficiency of foreign object temperature detection. In addition, the control device controls the driving device to move the foreign body sample to the designated point to be detected based on the position information of the point to be detected, thereby realizing automatic and precise positioning of the foreign body sample, making the mapping relationship between the type of stored foreign body sample, the position information of the point to be detected and the temperature data accurate and reliable, thereby improving the detection accuracy and efficiency of the wireless charging foreign body temperature detection system.

[0022] In a third aspect, an embodiment of the present application provides a control device comprising: a processor and a memory; the memory stores program instructions, and when the program instructions are executed by the processor, the control device implements the functions of the control device in the above-mentioned aspects and their various implementation methods.

[0023] Fourthly, embodiments of the present application further provide a chip system comprising a processor and a memory, wherein the memory stores program instructions. When the program instructions are executed by the processor, the chip system performs the functions of the control device in the above-mentioned aspects and their respective implementations. For example, it generates or processes the information involved in the above-mentioned system.

[0024] In a fifth aspect, an embodiment of the present application further provides a computer-readable storage medium, in which program instructions are stored. When the program instructions are run on a computer, the computer executes the functions of the control device in the above aspects and their various implementation methods.

[0025] In a sixth aspect, an embodiment of the present application further provides a computer program product, which, when executed on a computer, enables the computer to execute the functions of the control device in the above aspects and their respective implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a diagram of a wireless charging scenario shown in an embodiment of the present application;

[0027] Figure 2 This is a schematic diagram of a foreign object appearing during a wireless charging process shown in an embodiment of the present application;

[0028] Figure 3 This is a schematic diagram of a detection scenario for wireless charging foreign object temperature detection shown in an embodiment of the present application;

[0029] Figure 4a This is a schematic diagram of the structure of a wireless charging foreign object temperature detection system provided in an embodiment of the present application. Figure 1 ;

[0030] Figure 4b This is a schematic diagram of the structure of a wireless charging foreign object temperature detection system provided in an embodiment of the present application. Figure 2 ;

[0031] Figure 5 This is a controlled schematic diagram of a scanning device provided in an embodiment of the present application;

[0032] Figure 6 This is a controlled schematic diagram of a foreign body sample provided in an embodiment of the present application;

[0033] Figure 7 This is a controlled schematic diagram of a wireless receiver provided in an embodiment of the present application;

[0034] Figure 8 This is a schematic structural diagram of the first driving mechanism provided in an embodiment of the present application;

[0035] Figure 9is a structural diagram of the second driving mechanism provided in an embodiment of the present application;

[0036] Figure 10 This is a schematic structural diagram of a driving device provided in an embodiment of the present application;

[0037] Figure 11a This is the embodiment of the present application based on Figure 10 Control diagram of foreign body temperature detection of the drive device shown Figure 1 ;

[0038] Figure 11b The embodiment of this application provides Figure 10 Control diagram of foreign body temperature detection of the drive device shown Figure 2 ;

[0039] Figure 11c The embodiment of this application provides Figure 10 Control diagram of foreign body temperature detection of the drive device shown Figure 3 ;

[0040] Figure 12 The detection height H provided in the embodiment of the present application j Calculation principle diagram of ;

[0041] Figure 13a This is the embodiment of the present application based on Figure 10 A control schematic diagram of the foreign body sample position correction of the driving device shown;

[0042] Figure 13b This is the embodiment of the present application based on Figure 10 A control schematic diagram of the wireless receiver position correction of the driving device shown;

[0043] Figure 14 is a structural schematic diagram of another driving device provided in an embodiment of the present application;

[0044] Figure 15 The embodiment of this application provides Figure 14 A control schematic diagram of foreign body temperature detection of the driving device shown;

[0045] Figure 16 This is a schematic diagram of a control device storing and displaying detection data provided by an embodiment of the present application;

[0046] Figure 17 is a schematic diagram of a wireless transmitter provided in an embodiment of the present application;

[0047] Figure 18 This is a schematic diagram of the hardware structure of the control device provided in the embodiment of the present application;

[0048] Figure 19This is a flow chart of a first wireless charging foreign object temperature detection method provided by an embodiment of the present application;

[0049] Figure 20 This is a flow chart of a second method for detecting temperature of a foreign object in wireless charging provided by an embodiment of the present application;

[0050] Figure 21 This is a structural diagram of a wireless charging foreign object temperature detection device provided in an embodiment of the present application;

[0051] Figure 22 This is a structural diagram of another wireless charging foreign object temperature detection device provided in an embodiment of the present application;

[0052] Figure 23 It is a structural diagram of the chip system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0053] Figure 1 This is a wireless charging scene diagram provided by an embodiment of the present application. Figure 1 As shown, the wireless charging scenario involves a wireless transmitter 100 and a wireless receiver 200. Among them, the wireless transmitter 100 includes a support base and a first coil 102 (i.e., a power transmitting coil) provided inside the support base 101. The support base 101 is used to support the wireless receiver 200. The wireless receiver 200 has a second coil (i.e., a power receiving coil, not shown in the figure) that is mutually inductive with the first coil 102. After the wireless transmitter 100 is powered on, it enters a power transmission state, and the first coil 102 begins to generate alternating current. Through the near-field electromagnetic induction between the coils, current is generated in the second coil, thereby realizing the transfer of electrical energy from the wireless transmitter 100 to the wireless receiver 200. Therefore, the wireless transmitter 100 can also be called a wireless charger, which is used to provide electrical energy to the wireless receiver 200.

[0054] The wireless receiver 200 is an electronic device that supports wireless charging function, and the electronic devices include but are not limited to mobile phones (including foldable screen mobile phones), tablets, personal computers, workstation equipment, large-screen devices (for example: smart screens, smart TVs, etc.), wearable devices (for example: smart bracelets, smart watches), handheld game consoles, home game consoles, virtual reality devices, augmented reality devices, mixed reality devices, etc., in-vehicle smart terminals, etc.

[0055] Figure 2 This is a schematic diagram of a foreign object appearing during wireless charging, as shown in an embodiment of the present application. Figure 2As shown, there may be metal foreign objects, such as coins, keys, or metal buttons, between the wireless transmitter 100 and the wireless receiver 200. Under the influence of the electromagnetic field, the metal foreign objects generate eddy currents. The Joule effect of the eddy currents causes the metal foreign objects to heat up and heat up rapidly, potentially causing usage problems and safety hazards. For example, the hot metal foreign objects may burn the wireless transmitter 100 and the wireless receiver 200, cause certain components in the wireless receiver 200 to fail, or cause the wireless receiver 200 to explode due to battery overheating.

[0056] To ensure the safety of wireless charging technology, relevant safety standards require that the wireless transmitter be pre-tested for foreign object temperature rise, and specify the detection scenario, which includes the material and specifications of the foreign object sample, the distance between the wireless receiver 200 and the foreign object sample, and other detection conditions.

[0057] Figure 3 This is a schematic diagram of a wireless charging foreign body temperature detection scenario shown in an embodiment of the present application. Figure 3 As shown, detection scenarios may include:

[0058] Detection scenario 1: Figure 3 As shown in view (a), when the wireless transmitter 100 is in close contact with the foreign matter sample 300 and there is no wireless receiver 200 involved, the first temperature of each foreign matter sample at different positions on the wireless transmitter 100 is detected respectively.

[0059] Detection scenario 2: Figure 3 As shown in view (b), when the wireless receiver 200, the foreign matter sample 300 and the wireless transmitter 100 are in close contact, the first temperature of each foreign matter sample at different positions on the wireless transmitter 100 is detected respectively.

[0060] Detection scenario three: Figure 3 As shown in view (c), when the foreign matter sample 300 is in close contact with the wireless transmitter 100 and the distance between the wireless receiver 200 and the foreign matter sample is 2 mm, the first temperature of each foreign matter sample at different positions on the wireless transmitter 100 is detected respectively.

[0061] Detection scenario four: Figure 3 As shown in view (d), when the foreign matter sample 300 is in close contact with the wireless transmitter 100 and the distance between the wireless receiver 200 and the foreign matter sample is 5 mm, the first temperature of each foreign matter sample at different positions on the wireless transmitter 100 is detected respectively.

[0062] For any of the above detection scenarios, the wireless transmitter 100 can be placed in a room temperature environment and turned on at maximum transmission power. When detecting the temperature of the foreign body sample 300, a foreign body sample 300 of preset specifications can be used. For example, the foreign body sample 300 can include a steel sheet, an aluminum ring, and an aluminum foil of a specified size. Each foreign body sample 300 is provided with a temperature sensor 301, such as a thermocouple, an electronic thermometer, etc.

[0063] The maximum transmit power is the maximum power value that the wireless transmitter 100 can transmit and is one of the parameters for which the wireless transmitter 100 is calibrated. The wireless transmitter 100 can be connected to a power meter. After the wireless transmitter 100 is turned on, the tester can read the power value measured by the power meter. If the power value measured by the power meter reaches the maximum transmit power of the wireless transmitter 100, it indicates that the wireless transmitter 100 has activated the maximum transmit power.

[0064] The first temperature is the highest temperature of the foreign material sample detected at any location on the wireless transmitter 100. When the foreign material sample is moved to any location A on the wireless transmitter 100, the temperature sensor 301 can obtain the temperature value at location A. The temperature rise pattern of the foreign material sample 300 at location A is: the temperature gradually increases until it reaches the maximum temperature and eventually stabilizes at the maximum temperature. Therefore, if the temperature at location A remains constant for a predetermined period of time, this temperature is considered the first temperature of location A.

[0065] In detection scenario one, the tester can randomly place a foreign object sample 300 at position A on the surface of the support base 101 of the wireless transmitter 100. After measuring the first temperature corresponding to position A, the tester can manually randomly move the foreign object sample 300 to position B and measure the first temperature corresponding to position B. This process is repeated until the surface of the support base 101 of the wireless transmitter 100 is traversed, and the highest temperature rise point of the current type of foreign object sample 300 in detection scenario one is obtained.

[0066] The first temperature is the highest temperature corresponding to any position point on the surface of the support base 101 of the wireless transmitter 100, and is the highest temperature at a local position. After the tester traverses multiple position points on the surface of the support base 101 of the wireless transmitter 100, the second temperature can be obtained based on the first temperatures corresponding to the n position points previously detected. The second temperature = max{first temperature 1, second temperature 2, ..., first temperature n}, where n is the total number of position points traversed by the tester, that is, the second temperature is the global highest temperature under a certain type of foreign body sample 300 and a certain detection scenario. The position point corresponding to the global highest temperature is the highest temperature rise point.

[0067] After completing the foreign object temperature detection process in Scenario 1, the tester can switch to another detection scenario. For Scenario 4, for example, the tester can place a non-metallic support of a specified thickness between the wireless receiver 200 and the foreign object sample 300, ensuring a 5mm gap between them. The tester then randomly moves the foreign object sample 300 across the surface of the wireless transmitter 100. The temperature sensor 301 detects the temperature and temperature rise at each location on the foreign object sample 300.

[0068] Problems with traditional wireless charging foreign object temperature rise detection methods include:

[0069] First, the foreign object temperature rise detection task requires measuring the first temperature of the foreign object sample within the heating area of ​​the wireless transmitter 100, where the heating area is generally the coverage area of ​​the first coil 102. Because the first coil 102 is located inside the wireless transmitter 100, the tester cannot intuitively perceive the specific coverage area of ​​the first coil 102. Therefore, when the tester randomly moves the foreign object sample 300, the foreign object sample 300 may be moved outside the coverage area of ​​the first coil 102, resulting in low detection efficiency and the inability to quickly and accurately locate the highest temperature rise point.

[0070] Second, the construction and switching of the detection scenes are all completed manually by the testers. In each detection scene, the testers manually and randomly move the foreign body sample 300, groping for the highest temperature rise point of the foreign body sample. This detection method relies on the experience and techniques of the testers, is cumbersome to operate, and has low detection efficiency and accuracy.

[0071] Third, since the location points of the foreign body sample 300 are basically randomly selected by the testers, there is no accurate record of the mapping relationship between the location point coordinates and the foreign body temperature, which makes it difficult to use the previous detection data for accurate retesting later.

[0072] In order to improve the efficiency and accuracy of wireless charging foreign object temperature detection and achieve accurate re-testing, the embodiment of the present application provides a wireless charging foreign object temperature detection system.

[0073] Figure 4a This is a first structural diagram of a wireless charging foreign body temperature detection system provided in an embodiment of the present application. Figure 4a As shown, the wireless charging foreign object temperature detection system includes a wireless transmitter 100 , a wireless receiver 200 , a foreign object sample 300 , a control device 400 , a scanning device 500 and a driving device 600 .

[0074] Figure 4b This is a second structural diagram of a wireless charging foreign object temperature detection system provided in an embodiment of the present application. Figure 4bAs shown, when performing wireless charging foreign body temperature detection, the wireless transmitter 100 is fixedly placed on a preset detection plane 10, and the foreign body sample 300 is placed on the surface of the wireless transmitter 100 facing the wireless receiver 200 (hereinafter referred to as: first surface 103). In order to facilitate the positioning of each device during foreign body temperature detection, a coordinate origin can be set in the detection plane 10, and a three-dimensional coordinate system can be established with the directions parallel to the detection plane 10 as the X-axis and Y-axis, and the direction perpendicular to the detection plane 10 as the Z-axis. Among them, the Z-axis coordinate value of the detection plane 10 is set to 0, so that the Z-axis coordinate value of the side of the wireless transmitter 100 that is not in contact with the foreign body sample 300 is 0.

[0075] like Figure 4b As shown, the control device 400 is connected to the foreign body sample 300 via a driving device 600, and the control device 400 is also connected to the wireless receiver 200 via the driving device 600. The driving device 600 is used to drive the target to move according to the control instructions of the control device 400. For example, the driving device 600 is used to drive the foreign body sample 300 to move on the wireless transmitter 100, and can also be used to drive the wireless receiver 200 to rise or fall along the Z-axis to adjust the distance between the wireless receiver 200 and the foreign body sample 300.

[0076] Before performing temperature detection on the foreign body sample 300, the tester can input information indicating the type of the foreign body sample 300 to be tested to the control device 400, such as inputting "aluminum ring" or inputting other forms of preset type identification. After the control device 400 obtains the type of the foreign body sample 300 to be tested, for test scenario one: the control device 400 can record the type of the foreign body sample 300, the location information of the point to be detected and the mapping relationship between the temperature data. For non-test scenario one, such as the aforementioned test scenario two, test scenario three and test scenario four: the control device 400 can record the type of the foreign body sample 300, the location information of the point to be detected, the target distance between the wireless receiver 200 and the foreign body sample 300, and the mapping relationship between the temperature data.

[0077] The tester can input the type information of the foreign matter sample 300 to be tested into the control device 400 through an input device equipped with the control device 400 (e.g., a keyboard, function keys, etc.), or through various input methods such as voice and touch. In other possible implementations, the control device 400 can detect the type of the foreign matter sample 300 through methods such as image recognition. The detection system may also include an image acquisition device (e.g., a camera, etc.). When the control device 400 detects the type of the foreign matter sample 300, it turns on the image acquisition device and obtains an image of the foreign matter sample captured by the image acquisition device. The similarity between the foreign matter sample image and a stored reference image is compared, and the target reference image with the highest similarity to the foreign matter sample image is found. The target type corresponding to the target reference image is then the type of the current foreign matter sample 300. The reference images are pre-captured images of different types of foreign matter samples. The control device 400 stores the correspondence between the reference images and the types of foreign matter samples. For example, the first reference image corresponds to a steel sheet sample, the second reference image corresponds to an aluminum ring sample, and the third reference image corresponds to an aluminum foil sample, thereby achieving automatic detection and identification of the types of foreign matter samples. The manner in which the control device 400 obtains the type of foreign matter sample 300 is not limited to the embodiments of the present application.

[0078] A temperature sensor 301 is provided in the foreign material sample 300. The temperature sensor 301 is electrically connected to the control device 400 and is used to transmit the detected temperature of the foreign material sample 300 to the control device 400. By integrating the foreign material sample 300 and the temperature sensor 301 into one body, the temperature sensor 301 moves synchronously with the foreign material sample 300. This allows for rapid detection of the foreign material sample's temperature at the designated detection location, without requiring the simultaneous movement of the temperature sensor 301.

[0079] Figure 5 Schematic diagram of the scanning device 500 provided in the embodiment of the present application. Figure 5As shown, the driving device 600 can also be connected to the scanning device 500 and can be used to drive the scanning device 500 to move along the X-axis direction, the Y-axis direction and the Z-axis direction. The control device 400 can record the projection coordinates (x0, y0) of the center point of the wireless transmitter 100 in the detection plane 10. The control device 400 can generate a first control instruction based on the coordinates (x0, y0) and the preset scanning height z0, and send the first control instruction to the driving device 600. In response to the first control instruction, the driving device 600 moves the scanning device 500 to the position (x0, y0, z0), so that the position of the scanning device 500 corresponds to that of the wireless transmitter 100 in the X-axis direction and the Y-axis direction, and the distance between the scanning device 500 and the wireless transmitter 100 in the Z-axis direction is equal to z0. The driving device 600 sends positioning information A to the control device 400. The control device 400 receives the positioning information A, determines that the scanning device 500 has reached the designated scanning position, and then controls the scanning device 500 to turn on and scan the coil area of ​​the wireless transmitter 100 .

[0080] The scanning device 500 is configured to scan the maximum boundary 102a of the first coil 102 within the wireless transmitter 100 and determine the coordinate range of the maximum boundary 102a in the X-axis and Y-axis directions. Based on the positional information of the maximum boundary 102a and its internal area, the projected area of ​​the first coil 102 on the first surface 103 (hereinafter referred to as the "coil area") is obtained. Thus, the scanning device 500 generates positional distribution information of the coil area (hereinafter referred to as the "coil area information") based on the positional distribution and coverage of the coil area. The scanning device 500 transmits the coil area information obtained through scanning to the control device 400.

[0081] The control device 400 receives and stores the coil area information and controls the scanning device 500 to shut down. Based on the coil area information, the control device 400 can set at least one point to be detected within the coil area and set the order of the points to be detected, thereby generating a movement path of the foreign body sample 300 on the surface of the wireless transmitter 100. The scanning device 500 automatically scans the coverage area of ​​the first coil 102 within the wireless transmitter 100, thereby providing a reference for setting the points to be detected and automatically controlling the movement of the foreign body sample 300. This can prevent the foreign body sample 300 from moving outside the coil area, thereby improving detection efficiency and accuracy. The scanning device 500 can use a device with ultrasonic, X-ray or other detection capabilities.

[0082] The driving device 600 can also be detachably connected to the foreign sample 300 to facilitate switching between different types of foreign samples 300. After the foreign sample 300 is placed on the surface of the wireless transmitter 300, the driving device 600 is further used to drive the foreign sample 300 to move along the X-axis and Y-axis directions, while the coordinate of the foreign sample 300 in the Z-axis direction remains unchanged.

[0083] Figure 6 Schematic diagram of the controlled foreign body sample 300 provided in the embodiment of the present application. After the foreign body sample 300 is placed on the first surface 103, as shown in FIG. Figure 6 As shown, after the control device 400 generates the moving path of the foreign body sample 300 according to the coil area information detected by the scanning device 500, it can send a second control instruction to the driving device 600. The second control instruction contains the coordinates of the point to be detected in the X-axis and Y-axis directions (x i ,y i ), where i represents the serial number of the point to be detected on the moving path of the foreign body sample 300. The driving device 600 responds to the second control instruction and drives the foreign body sample 300 to move to (x i ,y i ) corresponding to the point to be detected, the positioning information B can be sent to the control device 400, and the temperature sensor 301 sends the temperature data detected at the current point to be detected to the control device 400. The positioning information B can include the coordinates of the point to be detected currently reached by the foreign matter sample 300, so that the control device 400 can accurately record the mapping relationship between the foreign matter temperature and the coordinates of the point to be detected.

[0084] Reference Figure 6 , the control device 400 receives the in-position information B and learns that the foreign body sample 300 has reached the point to be detected indicated by the second control instruction. After receiving the temperature data sent by the temperature sensor 301, the coordinates (x i ,y i ), temperature data, and the current foreign matter sample type. The temperature rise pattern at each detection point is generally a rise until it reaches and remains constant at a first temperature. Therefore, upon detecting that the temperature value remains constant at the first temperature for a preset period of time, the control device 400 records the mapping relationship between the coordinates of the detection point, the first temperature, and the current foreign matter sample type.

[0085] Figure 7 This is a controlled schematic diagram of the wireless receiver 200 provided in the embodiment of the present application. Figure 7As shown, the drive device 600 can also be connected to the wireless receiver 200. After aligning the wireless receiver 200 and the foreign matter sample 300 in the X-axis and Y-axis directions, the control device 400 can issue a third control instruction to the drive device 600. The third control instruction can include the detection height of the wireless receiver 200, which is set according to the requirements of the detection scenario. In response to the third control instruction, the drive device 600 drives the wireless receiver 200 to rise or fall along the Z-axis direction. After the wireless receiver 200 and the foreign matter sample 300 have a target distance in the Z-axis direction, the drive device 600 can send positioning information C to the control device 400. For example, the target distance in detection scenario 2 is 0 mm, the target distance in detection scenario 3 is 2 mm, and the target distance in detection scenario 4 is 5 mm. The positioning information C can include the distance between the wireless receiver 200 and the foreign matter sample 300, so that the control device 400 can accurately record the mapping relationship between the temperature data, the coordinates of the point to be detected, the target distance between the wireless receiver 200 and the foreign matter sample 300, and the current foreign matter sample type.

[0086] The drive device 600 can drive the scanning device 500, wireless receiver 200, and foreign body sample 300 to move, thereby completing the first coil scan, automatically constructing and switching detection scenarios, and automatically switching the detection point of the foreign body sample 300 within each detection scenario. The drive device 600 may include a first drive mechanism for connecting and moving the scanning device 500, a second drive mechanism for connecting and moving the wireless receiver 200, and a third drive mechanism for connecting and driving the foreign body sample 300.

[0087] Alternatively, the drive device 600 may be configured with only two drive mechanisms: drive mechanism A for connecting and moving the scanning device 500 and the foreign body sample 300, and drive mechanism B for connecting and driving the wireless receiver 200. When scanning the first coil before detection, drive mechanism A is connected to the scanning device 500. The control device 400 controls drive mechanism A to move the scanning device 500 to the designated scanning position, then controls the scanning device 500 to start scanning the coil area of ​​the wireless transmitter 100. After receiving the coil area information sent by the scanning device 500, the control device 400 turns off the scanning device 500. For non-detection scenario one, the wireless receiver 200 is connected to drive mechanism B and aligned with the wireless transmitter 100. The control device 400 controls drive mechanism B to adjust the wireless receiver 200 to the desired detection height. After disconnecting drive mechanism A from the scanning device 500, it is connected to the foreign body sample 300. This allows drive mechanism A to drive multiple objects by changing the connection target. The control device 400 controls the drive mechanism A to move the foreign object sample 300 to the detection point, thereby obtaining the temperature data corresponding to the detection point detected and transmitted by the temperature sensor 301. The control device 400 can automatically control the drive mechanism to connect and disconnect the driven object by issuing control commands, or it can be completed manually.

[0088] Figure 8 This is a schematic diagram of the structure of the first driving mechanism provided in the embodiment of the present application. Figure 8 As shown, for the driving mechanism included in the driving device 600, structures such as a robotic arm and a robot can be used. Taking the robotic arm as an example, the robotic arm is made of non-metallic materials to avoid interference and influence of metal materials on foreign body temperature detection and ensure detection accuracy. The control device 400 controls the robotic arm to automatically clamp the driven object and controls the robotic arm to move the driven object to a specified position. The control device 400 can control the robotic arm to clamp the scanning device 500 and move the scanning device 500 to a specified scanning position (x0, y0, z0). The control device 400 can control the robotic arm to clamp the foreign body sample 300 and move the foreign body sample 300 to the point to be detected. The control device 400 can control the robotic arm to clamp the wireless receiver 200 and move the wireless receiver 200 to the required detection height, so that the distance between the wireless receiver 200 and the foreign body sample 300 in the Z-axis direction meets the requirements of the relevant detection scenario.

[0089] Figure 9 This is a schematic diagram of the structure of the second driving mechanism provided in the embodiment of the present application. Figure 9As shown, for the driving mechanism included in the driving device 600, the structure may include: a first driving motor 601, a first telescopic rod 602, a first slider 603, a second driving motor 604, a second telescopic rod 605, a second slider 606, a third driving motor 607, a third telescopic rod 608, a third slider 609 and a bracket 610.

[0090] The first telescopic rod 602 is parallel to the X-axis, the first drive motor 601 is connected to the fixed end of the first telescopic rod 602, the movable end of the first telescopic rod 602 is connected to the first slider 603, the first slider 603 is connected to the bracket 610, and the bracket 610 is detachably connected to the driven object. The driven object includes the wireless receiver 200, the foreign object sample 300, and the scanning device 500. The first drive motor 601 can drive the first telescopic rod 602 to extend and retract along the X-axis, driving the first slider 603 to move along the X-axis. By adjusting the extension and retraction of the first telescopic rod 602, the position coordinates of the driven object in the X-axis direction can be precisely controlled. The bracket 610 is made of non-metallic material to prevent interference and influence of the bracket 610 on foreign object temperature detection, thereby ensuring detection accuracy.

[0091] The second telescopic rod 605 is parallel to the Y-axis. The second drive motor 604 is connected to the fixed end of the second telescopic rod 605. The movable end of the second telescopic rod 605 is connected to the second slider 606. The second slider 606 is connected to the bracket 610. The bracket 610 is detachably connected to the driven object. The second drive motor 604 can drive the second telescopic rod 605 to extend and retract along the Y-axis, driving the second slider 606 to move along the Y-axis. By adjusting the extension and retraction of the second telescopic rod 605, the position coordinates of the driven object along the Y-axis can be precisely controlled.

[0092] The third telescopic rod 608 is parallel to the Z-axis. The third drive motor 607 is connected to the fixed end of the third telescopic rod 608. The movable end of the third telescopic rod 608 is connected to the third slider 609. The third slider 609 is connected to the fixed ends of the first telescopic rod 602 and the second telescopic rod 605. The third drive motor 607 can drive the third telescopic rod 608 to extend and retract along the Z-axis, driving the third slider 609 to move along the Z-axis, thereby driving the first telescopic rod 602 and the second telescopic rod 605 to rise and fall. By adjusting the extension and retraction of the third telescopic rod 608, the position coordinates of the driven object along the Z-axis can be precisely controlled.

[0093] By coordinating the drive motors, telescopic rods, and sliders in the X, Y, and Z directions, the driven object can be precisely controlled to move to a specified spatial position. This embodiment of the application achieves automated control of foreign object temperature detection during wireless charging, improving detection efficiency and accuracy.

[0094] Figure 10Schematic diagram of the structure of a driving device 600 provided in an embodiment of the present application. Figure 10 As shown, the driving device 600 may include a first foreign object driving mechanism and a lifting mechanism. The lifting mechanism includes a first motor 611, a lifting rod 612, a first sliding member 613, and a first bracket 614. The first foreign object driving mechanism includes a second motor 615, a second connecting rod 616, a second sliding member 617, a second support rod 618, a third motor 619, a third connecting rod 620, a third sliding member 621, and a third support rod 622.

[0095] The first motor 611 is connected to the fixed end of the lifting rod 612, and the lifting rod 612 is parallel to the Z-axis. The first bracket 614 includes a first support rod 614a and a support frame 614b. The first support rod 614a is vertically connected to the movable end of the lifting rod 612 via a first sliding component 613, and the support frame 614b is connected to the end of the first support rod 614a away from the first sliding component 613. A through hole 622c is provided in the support frame 614b, and the central axis of the through hole 622c is parallel to the Z-axis. The support frame 614b is used to support the scanning device 500 and the wireless receiver 200. The purpose of providing the through hole 622c is to enable the detection signal emitted by the scanning device 500 to pass through the through hole 622c and reach the wireless transmitter 100, and to enable the electrical energy emitted by the wireless transmitter 100 to be transmitted to the wireless receiver 200. The first support rod 614 a and the first sliding component 613 may be configured to be detachably connected. According to requirements of different detection scenarios, the first sliding component 613 may be connected to or not connected to the first bracket 614 .

[0096] The control device 400 controls the operating state of the first motor 611 (e.g., start / stop, forward / reverse rotation), driving the lifting rod 612 upward or downward, thereby moving the first sliding member 613 and the first bracket 614 along the Z-axis. By adjusting the length of the lifting rod 612, the Z-axis spacing between the scanning device 500 and the wireless transmitter 100 can be precisely controlled, as can the spacing between the wireless receiver 200 and the foreign object sample 300. The first bracket 614 is made of a non-metallic material to prevent interference with foreign object temperature detection, thereby ensuring detection accuracy.

[0097] The second connecting rod 616 is a retractable connecting rod structure. The second motor 615 is connected to the fixed end of the second connecting rod 616, and the second connecting rod 616 is parallel to the X-axis direction. The movable end of the second connecting rod 616 is connected to the second support rod 618 through the second sliding component 617, and the second support rod 618 is parallel to the Y-axis direction. The end of the second support rod 618 away from the second sliding component 617 is detachably connected to the foreign body sample 300. The control device 400 controls the operating state of the second motor 615 (such as start and stop, forward rotation, reverse rotation, etc.) to enable the second motor 615 to drive the second connecting rod 616 to retract, drive the second sliding component 617, the second support rod 618 and the foreign body sample 300 to move along the X-axis direction, and by adjusting the extension amount of the second connecting rod 616, the position coordinates of the foreign body sample 300 in the X-axis direction can be accurately controlled. The second support rod 618 is made of non-metallic material to avoid interference and influence of the second support rod 618 on foreign body temperature detection, thereby ensuring detection accuracy.

[0098] The third connecting rod 620 is a retractable connecting rod structure. The third motor 619 is connected to the fixed end of the third connecting rod 620, and the third connecting rod 620 is parallel to the Y-axis direction. The movable end of the third connecting rod 620 is connected to the third support rod 622 via the third sliding component 621, and the third support rod 622 is parallel to the X-axis direction. The end of the third support rod 622 away from the third sliding component 621 is detachably connected to the foreign body sample 300. The control device 400 can drive the third connecting rod 620 to retract and retract by controlling the operating state of the third motor 619 (such as start and stop, forward rotation, reverse rotation, etc.), driving the third sliding component 621, the third support rod 622 and the foreign body sample 300 to move along the Y-axis direction. By adjusting the extension amount of the third connecting rod 620, the position coordinates of the foreign body sample 300 in the Y-axis direction can be accurately controlled. The third support rod 622 is made of non-metallic material to avoid interference and influence of the third support rod 6228 on foreign body temperature detection, thereby ensuring detection accuracy.

[0099] The second support rod 618 and the third support rod 622 can be set as a telescopic rod structure so that the length of the second support rod 618 is equal to the length of the third connecting rod 620, and the length of the third support rod 622 is equal to the length of the second connecting rod 616, thereby moving the foreign body sample 300 to the point to be detected indicated by the control device 400.

[0100] In some implementations, corresponding slides can be set for the sliding components, for example, the first sliding component 613 moves along a first slide parallel to the Z-axis direction, the second sliding component 617 moves along a second slide parallel to the X-axis direction, and the third sliding component 621 moves along a third slide parallel to the Y-axis direction.

[0101] Before the formal test, the scanning device 500 can be fixed on the support frame 614b by machine control or manual operation by a tester, and the support frame 614b can be adjusted to align with the first surface 103 of the wireless transmitter 100.

[0102] Figure 11a This is the embodiment of the present application based on Figure 10 The first control diagram of the foreign body temperature detection of the driving device 600 is shown. Figure 11a As shown, the control device 400 starts the first motor 611 and sends a first instruction to the first motor 611. The first instruction is used to instruct the first motor 611 to move the scanning device 500 supported by the first bracket 614 to a preset scanning height. The control device 400 receives the first positioning information sent by the first motor 611 in response to the completion of the first instruction, and controls the scanning device 500 to start detecting the coil area information. The control device 400 receives the coil area information sent by the scanning device 500 via wired or wireless means, shuts down the scanning device 500, and may issue a first prompt message. The detection point and the movement path of the foreign body sample 300 are set according to the coil area information. The first prompt message is used to indicate that the scan is complete and to prompt the removal of the scanning device 500. In a specific implementation, for example, the first prompt message can be displayed on the display screen of the control device 400, and / or the first prompt message can be broadcasted through the sound device of the control device 400, and / or the first prompt message can be pushed to at least one electronic device in communication with the control device 400. After receiving the coil area information, the control device 400 may also control the driving device 600 to remove the scanning device 500 , for example, by controlling the robot arm to grasp the scanning device 500 and take the scanning device 500 away from the support frame 614 b .

[0103] During the formal testing phase, it is assumed that foreign object temperature detection is first performed in detection scenario 1. In detection scenario 1, the wireless receiver 200 is not involved in the detection. Therefore, the wireless receiver 200 is not placed on the support frame 614b, or the first support frame 614 can be removed. The tester connects the first foreign object sample 300 to the second support rod 618 and the third support rod 622. The foreign object sample can be placed on the first surface 103 by machine control or manual operation by the tester.

[0104] In some implementations, the wireless transmitter 100 may be connected to a power detection device, and the control device 400 may communicate with the power detection device via a wired or wireless method. Thus, after controlling the wireless transmitter 100 to start up, the control device 400 may obtain power data measured by the power detection device. If the power value measured by the power detection device reaches the maximum transmit power, the control device 400 determines that the wireless transmitter 100 has activated the maximum transmit power.

[0105] Figure 11bThe embodiment of this application provides Figure 10 The second control diagram of the foreign body temperature detection of the driving device 600 is shown. Figure 11b As shown, the control device 400 controls the wireless transmitter 100 to turn on the maximum transmission power, according to the coordinates (x i ,y i ), 1≤i≤N, N represents the total number of points to be detected contained in the moving path planned by the control device 400 for the foreign body sample 300, sends a second instruction to the second motor 615, and sends a third instruction to the third motor 619.

[0106] The second motor 615 responds to the second instruction and moves the foreign matter sample 300 to the coordinate value x on the X axis. i The third motor 619 responds to the third instruction and moves the foreign body sample 300 to the coordinate value y on the Y axis. i The control device receives the second and third positioning information, obtains the temperature data currently detected by the temperature sensor 301, and constructs the current foreign matter sample type and the coordinates (x i ,y i ) and the mapping relationship between the temperature data (or the first temperature). And so on, until all the points to be detected on the moving path of the foreign body sample 300 are traversed, the detection process for detection scene one is ended. Next, you can switch to detection scene two, detection scene three and detection scene four. You can fix the wireless receiver 200 on the support frame 614b by machine control or manual operation of the tester, and then control the device 400 according to the detection sequence of the detection scene, control the driving device 600 to adjust the target distance z between the wireless receiver 200 and the foreign body sample 300 in the Z-axis direction. j Wherein, j represents the sequence number of the detection scene, for example, j = 2, 3, 4, z2 = 0 mm, z3 = 2 mm, z4 = 5 mm.

[0107] Figure 11c The embodiment of this application provides Figure 10 FIG. 3 is a third control diagram of the foreign body temperature detection of the driving device 600. Figure 11c As shown, the control device 400 starts the first motor 611 and sends a fourth instruction to the first motor 611. The fourth instruction is used to instruct the first motor 611 to move the support frame 614b to the target detection height H j , so that the height difference between the wireless receiver 200 and the foreign body sample 300 in the Z-axis direction is equal to the target distance z j The first motor 611 responds to the fourth instruction and moves the support frame 614b to the target detection height H by manipulating the lifting rod 612.j After that, the fourth in-position information is sent to the control device 400. The control device 400 receives the fourth in-position information and starts the detection process under the current detection scenario. The detection process of the above-mentioned detection scenario 1 can be referred to, and all the points to be detected on the moving path of the foreign body sample 300 are traversed. The control device 400 stores the current foreign body sample type, target distance z j 、Coordinates of the point to be detected (x i ,y i ) and the foreign body temperature. When storing the mapping relationship, the mapped foreign body temperature can be the complete temperature data detected by the temperature sensor 301, or it can be the temperature data at the current detection point (x i ,y i ) maintains a constant temperature (ie, the first temperature) of the foreign matter sample 300 within a preset time period.

[0108] After completing the detection process for all detection scenarios using the first foreign matter sample 300, you can switch to other types of foreign matter samples and continue to complete the detection process for all detection scenarios according to the above implementation method until the temperature detection of all types of foreign matter samples is completed. Alternatively, in each separate detection scenario, complete the temperature rise detection process for all types of foreign matter samples, then switch to the next detection scenario, and so on, until all detection scenarios and all types of foreign matter samples are traversed.

[0109] Figure 12 The detection height H provided in the embodiment of the present application j The calculation principle diagram of Figure 12 As shown, assuming that the Z-axis coordinate of the side of the wireless transmitter 100 that is not in contact with the foreign sample 300 is 0, the thickness T1 of the wireless transmitter 100, the thickness T2 of the foreign sample 300, the thickness T3 of the support frame 614b and the target distance z j , calculate the detection height H of the wireless receiver 200 in the Z-axis direction j , such as H j =T1+T2+z j -T3. The control device 400 obtains the current height of the first bracket 614 as h, and compares h with H j If h is less than H j , the fourth instruction is used to instruct the first motor 611 to raise the first bracket 614 by an amount H j -h. If h is greater than H j , the fourth instruction is used to instruct the first motor 611 to lower the first bracket 614 by an amount of hH j .

[0110] In each detection scenario, after the control device 400 receives the temperature data of the foreign object sample 300 corresponding to the last point to be detected and stores the corresponding mapping relationship data, it can issue a second prompt message and start the foreign object temperature detection process for the next detection scenario. The second prompt message is used to indicate the end of foreign object temperature detection for the current detection scenario.

[0111] Figure 13a This is the embodiment of the present application based on Figure 10 FIG. 6 is a control diagram of the foreign body sample position correction of the driving device 600. Figure 13a As shown, Figure 10 The first sliding member 613 of the driving device 600 includes a first positioning device 613a, the second sliding member 617 includes a second positioning device 617a, and the third sliding member 621 includes a third positioning device 621a. The first positioning device 613a is used to detect the position coordinate Z of the first sliding member 613 on the Z axis. 1j The second positioning device 617a is used to detect the position coordinate X of the second sliding member 617 on the X axis. 1i The third positioning device 621a is used to detect the position coordinate Y of the third sliding member 621 on the Y axis. 1i The first positioning device 613a, the second positioning device 617a and the third positioning device 621a can send the detected slider position coordinates to the control device 400 via wired or wireless communication. The first positioning device 613a, the second positioning device 617a and the third positioning device 621a can be distance sensors or the like.

[0112] like Figure 13a As shown, the second motor 615 responds to the second instruction and moves the foreign body sample 300 to the coordinate value x on the X axis. i After the second motor 615 responds to the second instruction and drives the second sliding member 617 to start moving along the X-axis direction, the second positioning device 617a detects the current coordinate value X of the second sliding member 617 on the X-axis when the second sliding member 617 stops moving. 1i , and sends the fifth positioning information to the control device 400, the fifth positioning information includes the coordinate value X 1i .

[0113] The third motor 619 responds to the third instruction and moves the foreign matter sample 300 to the coordinate value y on the Y axis. i After the third motor 619 responds to the third instruction and drives the third sliding member 621 to start moving along the Y-axis direction, the third positioning device 621a detects the current coordinate value Y of the third sliding member 621 on the Y-axis when the third sliding member 621 stops moving. 1i, and sends the sixth positioning information to the control device 400, the sixth positioning information includes the coordinate value Y 1i .

[0114] like Figure 13a As shown, the control device 400 receives the fifth and sixth positioning information and compares (x i ,y i ) and (X 1i , Y 1i ) is consistent, that is, to verify whether the foreign body sample 300 is accurately moved to the current point to be detected. If the control device 400 detects (x i ,y i ) and (X 1i , Y 1i ) are consistent, the temperature sensor 301 is controlled to turn on and detect the temperature data of the foreign matter sample 300.

[0115] If the control device 400 detects (x i ,y i ) and (X 1i , Y 1i ) is inconsistent, which may include three situations: the first is x i With X 1i Consistent, y i With Y 1i Inconsistent; the second is y i With Y 1i Consistent, x i With X 1i Inconsistent; the third is x i With X 1i Inconsistent, y i With Y 1i The control device 400 can be based on (x i ,y i ) and (X 1i , Y 1i ) between the two positions, a first correction instruction is generated and sent to the driving device 600. The driving device 600 adjusts the coordinates of the foreign body sample 300 on the X axis and / or the Y axis according to the first correction instruction. After the position correction of the foreign body sample is performed, the second positioning device 617a sends the updated fifth positioning information to the control device, and / or the third positioning device 621a sends the updated sixth positioning information to the control device. After the control device 400 receives the updated fifth positioning information and / or the sixth positioning information, if it is detected that (x i ,y i ) and the updated (X 1i , Y 1i) are consistent, the temperature sensor 301 is controlled to turn on and detect the temperature data of the foreign body sample 300, thereby ensuring the accuracy of the mapping relationship between the point to be detected and the foreign body temperature.

[0116] Figure 13b This is the embodiment of the present application based on Figure 10 The control diagram of the wireless receiver position correction of the driving device 600 is shown. Figure 13b As shown, the first motor 611 responds to the fourth instruction and moves the first bracket 614 to the target detection height H j , so that the height difference between the wireless receiver 200 and the foreign matter sample 300 in the Z-axis direction is the target distance z j After the first motor 611 responds to the fourth instruction and drives the first sliding component 613 to start moving along the Z axis, the first positioning device 613a detects the position coordinate Z of the first sliding component 613 on the Z axis when the first sliding component 613 stops moving. 1j , and sends the seventh positioning information to the control device 400, the seventh positioning information includes the coordinate value Z 1j The control device 400 receives the seventh in-position information and compares H j With Z 1j Whether it is consistent, that is, whether the wireless receiver 200 is moved to the specified detection height H j If the control device 400 detects H j With Z 1j If they are consistent, the foreign object temperature detection process under the current detection scenario is started.

[0117] If the control device 400 detects H j With Z 1j Inconsistency can be based on H j With Z 1j The deviation between the two is generated and a second correction instruction is sent to the first motor 611. The first motor 611 adjusts the position of the support frame 614b and the wireless receiver 200 supported by it in the Z-axis direction according to the second correction instruction. The first positioning device 613a sends the updated seventh positioning information to the control device 400. The control device 400 receives the updated seventh positioning information after the position correction. If H is detected, j With the updated Z 1j When the two are consistent, the detection process for the current detection scenario is started, thereby ensuring the accuracy of the mapping relationship between the distance between the wireless receiver 200 and the foreign object sample 300 and the foreign object temperature. Through the position verification mechanism, the position of the foreign object sample 300 and the wireless transmitter 100 is automatically calibrated, thereby ensuring the accuracy of the mapping relationship data and facilitating accurate retesting.

[0118] Figure 14This is a schematic diagram of the structure of another driving device 600 provided in an embodiment of the present application. Figure 14 As shown, the driving device 600 may include a lifting mechanism and a second foreign body driving mechanism. The structure and control method of the lifting mechanism can be referred to Figure 10 The exemplary drive device implementation is not described in detail here.

[0119] The second foreign object driving mechanism includes a fourth motor 623 , a rotating component 624 , a fifth motor 625 and a fourth connecting rod 626 .

[0120] The rotating component 624 is disposed at the fixed end of the lifting rod 612 in the lifting mechanism. The central axis of the rotating component 624 is parallel to the Z-axis. The fourth motor 623 is connected to the rotating component 624 and can drive the rotating component 624 to rotate about the Z-axis. The fourth connecting rod 626 is a retractable connecting rod structure. The fixed end of the fourth connecting rod 626 is connected to the rotating component 624, and the central axis of the rotating component 624 is perpendicular to the fourth connecting rod 626. The movable end of the fourth connecting rod 626 is detachably connected to the foreign material sample 300 to facilitate changing the type of foreign material sample 300 driven. The fifth motor 625 is connected to the fourth connecting rod 626 to adjust the length of the fourth connecting rod 626. By designing the relative connection positions and dimensions of the components in the second foreign material driving mechanism in the Z-axis, after the fourth connecting rod 626 is connected to the foreign material sample 300, the surface of the wireless transmitter 100 facing the wireless receiver 100 contacts the foreign material sample 300 without affecting the operation of the lifting mechanism.

[0121] The control device 400 controls the operating state of the fourth motor 623 (such as start, stop, forward rotation, reverse rotation, etc.) to drive the rotating component 624 to rotate around the Z axis, thereby changing the angle between the fourth connecting rod 626 and the X axis and Y axis.

[0122] The control device 400 controls the operating state of the fifth motor 625 (e.g., start / stop, forward rotation, reverse rotation, etc.) to cause the fifth motor 625 to extend or shorten the fourth connecting rod 626, thereby adjusting the length of the fourth connecting rod 626. By adjusting the length of the fourth connecting rod 626 and the angle of the fourth connecting rod 626 relative to the X-axis, the foreign body sample 300 can be moved to the point to be detected.

[0123] like Figure 14 As shown, the coordinates of the current point to be detected (x i ,y i ), calculate the target length l of the fourth link 626 and the target angle θ of the fourth link 626 relative to the X-axis direction, where Through the current length and current angle of the fourth link 626 relative to the X-axis direction, as well as the target length l and the target angle θ, the extension and contraction amount of the fourth link 626 and the rotation angle of the rotating part 624 on the fourth link 626 can be determined, so as to adjust the foreign body sample 300 to the point to be detected.

[0124] Figure 10 and Figure 14 The difference between the driving device of the foreign body temperature detection control process is that in each detection scenario, the control device 400 controls the foreign body sample 300 to move to the point to be detected in a different way. Figure 14 The second foreign matter driving mechanism shown mainly illustrates how, in each detection scenario, the control device 400 controls the second foreign matter driving mechanism to move the foreign matter sample 300 along a pre-planned path.

[0125] Before the formal detection, the control device 400 controls the lifting device to move the scanning device 500 to the preset scanning height, and the control process of obtaining the coil area information corresponding to the wireless transmitter 100 detected by the scanning device 500 can refer to the aforementioned Figure 10 The relevant controlled process of the lifting mechanism in the driving device provided is realized and will not be described here.

[0126] During the formal testing stage, for example, foreign body temperature detection is first performed in detection scene one. In detection scene one, the wireless receiver 200 does not participate in the detection, so the support frame 614b in the lifting mechanism does not place the wireless receiver 200 or the first bracket 614 is removed. The first foreign body sample 300 can be connected to the movable end of the fourth connecting rod 626 by machine control or manual operation of the tester, and the foreign body sample 300 is placed on the first surface 103.

[0127] Figure 15 The embodiment of this application provides Figure 14 FIG. 6 is a control diagram of the foreign body temperature detection of the driving device 600. Figure 15 As shown, the control device 400 controls the wireless transmitter 100 to turn on the maximum transmission power, according to the coordinates (x i ,y i ), sends a fifth instruction to the fourth motor 623, and sends a sixth instruction to the fifth motor 625. In response to the fifth instruction, the fourth motor 623 drives the rotating component 624 to rotate the fourth connecting rod 626 along the Z-axis, so that the fourth connecting rod 626 is rotated to a target angle θ with the X-axis, and returns eighth positioning information to the control device 400.

[0128] In response to the sixth instruction, the fifth motor 625 drives the fourth connecting rod 626 to extend or shorten, adjusts the length of the fourth connecting rod 626 to the target length l, and returns ninth positioning information to the control device 400.

[0129] After receiving the eighth and ninth positioning information, the control device 400 obtains the foreign body temperature currently detected by the temperature sensor 301, and stores the current foreign body sample type, the coordinates of the i-th point to be detected (x i ,y i By analogy, the mapping relationship between the temperature of the foreign body and the temperature of the foreign body is obtained, until all the points to be detected on the moving path of the foreign body sample 300 are traversed, and the detection process for detection scenario 1 is terminated.

[0130] Next, if you want to switch to detection scene 2, detection scene 3 and detection scene 4, the control device 400 can control the lifting device to adjust the distance between the wireless receiver 200 and the foreign body sample 300 in the Z-axis direction. The control process can refer to the above Figure 10 The relevant controlled process of the lifting mechanism in the driving device provided is realized, which will not be described here. In the detection scene 2, detection scene 3 and detection scene 4, you can refer to Figure 14 The controlled process of the second foreign body driving mechanism in the provided driving device moves the foreign body sample to each point to be detected contained in the path, and so on, until all detection scenes and all types of foreign body samples are traversed.

[0131] It should be noted that the structure and controlled mode of the driving device, as well as the number of detection scenarios and test conditions are not limited to those shown in the embodiments of the present application.

[0132] Figure 16 FIG. 4 is a schematic diagram of a control device 400 provided in an embodiment of the present application for storing and displaying detection data. Figure 16 As shown, the control device 400 may include a memory and a display screen. The control device 400 is also used to store the current foreign matter sample type, target distance z j 、Coordinates of the point to be detected (x i ,y i The mapping relationship between the temperature of the foreign body and the temperature of the foreign body is stored in the memory. The control device 400 is also used to control the display screen to display the specified content.

[0133] The control device 400 can control the memory to store the current foreign matter sample type, target distance z j 、Coordinates of the point to be detected (x i ,y i ) and the temperature data detected in real time by the temperature sensor 301. The temperature data detected in real time by the temperature sensor 301 can be presented in the form of a temperature change curve, an array, etc. Alternatively, the control device 400 can control the memory to store the current foreign matter sample type, the target distance z j 、Coordinates of the point to be detected (x i ,y i) and the first temperature. Since the wireless receiver 200 does not participate in the test in the detection scenario 1, the memory can store the target distance z j Stored as a special character used to indicate no receiver, such as a null character, etc.

[0134] like Figure 16 As shown, the control device 400 can control the display screen to display the type of foreign matter sample 300, the coordinates (x i ,y i ), the target distance z between the wireless receiver 200 and the foreign body sample 300 j As well as the temperature data of the foreign body sample 300 detected by the temperature sensor 301, etc. Since the wireless receiver 200 does not participate in the test in the detection scenario 1, the target distance z displayed on the display screen j For example, it can be presented in the form of "none" or "no receiver".

[0135] The control device 400 can control the display screen to display the temperature data detected in real time by the temperature sensor 301, so that the tester can intuitively view the temperature variation pattern of the foreign matter sample 300 at each detection point in each detection scene through the display screen. Alternatively, the control device 400 can obtain the first temperature at the current detection point in the current detection scene based on the variation of the temperature data detected in real time by the temperature sensor 301 or the temperature variation curve, and control the display screen to display the first temperature, so that the tester can know the maximum temperature generated by the foreign matter sample 300 at each detection point in each detection scene through the display screen.

[0136] The control device 400 may also be configured with an application platform related to foreign body temperature detection, so that the tester can log in to the application platform based on the display screen in an interactive manner such as touch or input devices, and enter different operations and requests, such as entering the type information of the foreign body sample 300 currently to be tested, entering a historical data query request, entering a foreign body temperature detection appointment request, etc. In response to the historical data query request input by the user, the control device 400 can search the memory for mapping relationship data that matches the historical data query request, and control the display screen to display the mapping relationship data on the application platform page, so that the tester can query the historical detection data and provide reliable data support for accurate retesting. Among them, the historical data query request may include one or more screening information such as the detection date, the model of the wireless transmitter 100, the type of the foreign body sample 300, the distance between the wireless receiver 200 and the foreign body sample 300, the target detection point, etc. The embodiment of the present application does not limit other functional configurations of the application platform related to foreign body temperature detection.

[0137] The temperature rise rule of the foreign body sample 300 at the point to be detected is generally to heat up first, until it rises to a certain maximum temperature (i.e., the first temperature, which is unknown in advance), and finally stabilizes at the first temperature. The control device 400 detects whether the temperature of the foreign body sample 300 remains unchanged within a preset time period based on the temperature data corresponding to the current point to be detected, so as to determine whether the temperature of the foreign body sample 300 has risen to the maximum temperature that can be reached at the current point to be detected. Among them, the preset time period can be set according to the detection requirements. If the temperature of the foreign body sample 300 does not remain unchanged within the preset time period, it indicates that the temperature of the foreign body sample 300 is still changing, and the control device 400 continues to obtain the temperature data detected by the temperature sensor 301 at the current point to be detected. If the temperature of the foreign body sample 300 remains unchanged within the preset time period, it indicates that the temperature of the foreign body sample 300 has stabilized, and the foreign body temperature detection at the current detection point is completed. The control device 400 can control the drive device 600 to move the foreign body sample 300 to the next point to be detected of the current point to be detected. In this way, the control device 400 can detect the temperature detection progress of the foreign matter sample 300 at the current point to be detected by monitoring the change pattern of the temperature data of the foreign matter sample 300. Once the temperature of the foreign matter sample 300 remains unchanged within the preset time, the temperature detection of the current point to be detected is ended, and the driving device 600 is controlled to move the foreign matter sample 300 to the next point to be detected, thereby avoiding the foreign matter sample 300 staying at the current point to be detected for too long, thereby improving the detection efficiency of the wireless charging foreign matter temperature detection system.

[0138] In each detection scenario, because the points to be detected are distributed at different locations within the coverage area of ​​the first coil on the wireless transmitter 100, the temperature rise characteristics at the points to be detected may vary significantly when the wireless transmitter 100 maintains maximum transmit power. For example, in detection scenario 1, the maximum temperature that can be reached at detection point 1 is 70°C, and the maximum temperature that can be reached at detection point 2 is 65°C. If the foreign object temperature detection at detection point 1 is completed and the foreign object sample 300 is immediately moved to detection point 2, the temperature of the foreign object sample 300 may be higher than 65°C, resulting in inaccurate foreign object temperature detection at detection point 2.

[0139] To improve the detection accuracy of foreign body temperature, for each detection scenario, the foreign body sample 300 may be cooled before being moved to the next detection point. The embodiments of the present application include but are not limited to the following cooling strategies:

[0140] Cooling strategy one: The control device 400 detects that the temperature of the foreign body sample 300 at the current point to be detected remains unchanged within a preset time period, controls the wireless transmitter 100 to reduce the transmission power or turns off the wireless transmitter 100, and controls the timer to start timing. The purpose of reducing the transmission power or turning off the wireless transmitter 100 is to quickly reduce the temperature of the foreign body sample 300. When the control device 400 detects that the timing time reaches the preset time threshold, it controls the driving device 600 to move the foreign body sample 300 to the next point to be detected, and controls the wireless transmitter 100 to transmit at maximum power. Cooling strategy one is to allow the foreign body sample 300 to cool at the current point to be detected for a time period corresponding to the preset time threshold, and then controls the foreign body sample 300 to move to the next point to be detected. The preset time threshold is not limited, for example, it is set to 3 seconds to 5 seconds.

[0141] Cooling Strategy 2: When the control device 400 detects that the temperature of the foreign material sample 300 at the current detection point remains constant for a preset period of time, it controls the wireless transmitter 100 to reduce the transmission power or shut down the wireless transmitter 100. Upon detecting that the temperature of the foreign material sample 300 has dropped to a preset temperature, the control device 400 controls the driving device 600 to move the foreign material sample 300 to the next detection point and controls the wireless transmitter 100 to transmit at maximum power. The preset temperature may be, for example, the current ambient temperature.

[0142] Cooling strategy three: The control device 400 detects that the temperature of the foreign body sample 300 at the current point to be detected remains unchanged within a preset time period, and controls the wireless transmitter 100 to reduce the transmission power or turn off the wireless transmitter 100. When the control device 400 detects that the cooling amplitude of the foreign body sample 300 reaches a preset ratio, it controls the driving device 600 to move the foreign body sample 300 to the next point to be detected, and controls the wireless transmitter 100 to transmit the maximum power. Wherein, the cooling amplitude = (first temperature - current temperature of the foreign body) / first temperature. The preset ratio is less than 1, and the value of the preset ratio is not limited, for example, it is set to 20%. The first temperature is the temperature at which the foreign body sample 300 remains unchanged at the current point to be detected for a preset time period.

[0143] Figure 17 A schematic diagram of a wireless transmitter 100 is provided. Figure 17As shown, the support base 101 of the wireless transmitter 100 may further include at least one protective device 104, which is located within the coverage area of ​​the first coil 102 to implement a foreign object protection function. The foreign object protection function means that when the protective device 104 senses the presence of a metal foreign object in the protection area, it automatically reduces the transmission power of the wireless transmitter 100 so that the wireless transmitter 100 no longer transmits at maximum power, thereby preventing the high-temperature metal foreign object from burning the foreign object itself, the wireless transmitter 100, and the wireless receiver 200. The protection area is the projection area of ​​the protective device 104 on the first surface 103 of the wireless transmitter 100.

[0144] The scanning device 500 is also used to detect the protection area corresponding to the protection device 104 in the wireless transmitter 100 and transmit the coil area information and the protection area information to the control device 400. The protection area information is information about the location distribution of the protection area on the first surface 103. Based on the coil area information, the control device 400 sets the distribution of the points to be detected on the first surface 103 of the wireless transmitter 100. The coil area is represented as R1 and the protection area is represented as R2. Since R1 contains R2, the point to be detected may be located within the area corresponding to (R1-R2) or within the area corresponding to (R1∩R2) (i.e., R2).

[0145] The control device 400 can divide the points to be detected into first and second points based on the coordinates of the points to be detected and the protection zone information. The first points to be detected are those located within the coil area but not within the protection zone, i.e., within the area corresponding to (R1-R2). The second points to be detected are those located within the protection zone (i.e., R2).

[0146] The control device 400 may also combine all first points to be detected into a first point set and set the detection order of each point to be detected in the first point set, thereby forming a first path corresponding to the first point set. During the process of the control device 400 controlling the foreign body sample 300 to move along the first path, since the wireless transmitter 100 maintains the maximum transmission power, the control device 400 may adopt any one of the above-mentioned cooling strategies, cooling strategy 1, cooling strategy 2, and cooling strategy 3, to cool the foreign body sample 300 before controlling the driving device 600 to switch the first point to be detected where the foreign body sample 300 is located within the first path, so as to ensure the accuracy of foreign body temperature detection.

[0147] The control device 400 can also combine all the second points to be detected into a second point set, and set the detection order of each point to be detected in the second point set, thereby forming a second path corresponding to the second point set. During the process of the control device 400 controlling the foreign body sample 300 to move along the second path, the protection device 104 senses the presence of metal foreign matter in the protection area and reduces the transmission power of the wireless transmitter 100, so that the temperature rise characteristics between the second points to be detected are basically close. Therefore, before the control device 400 controls the driving device 600 to switch the second point to be detected where the foreign body sample is located in the second path, there is no need to execute a cooling strategy and the foreign body sample 300 is not cooled, thereby shortening the time consumed in traversing the second path.

[0148] If the scanning device 500 detects that the wireless transmitter 100 has a protective device 104, the control device 400 can set the distribution of the first and second detection points based on the coil area information and protection area information sent by the scanning device 500, and plan the first and second paths. In the same detection scenario, the control device 400 can control the foreign body sample 300 to switch the detection point according to the first and second paths respectively, and only implement a cooling strategy on the foreign body sample 300 before switching to the first detection point under the first path. Under the second path, there is no need to implement a cooling strategy on the foreign body sample 300 throughout the entire process, thereby reducing the cooling time caused by traversing all detection points and improving the efficiency of foreign body temperature detection.

[0149] Based on the aforementioned wireless charging foreign object temperature detection system, in order to improve the efficiency and accuracy of wireless charging foreign object temperature detection and achieve accurate re-testing, the embodiment of the present application provides a wireless charging foreign object temperature detection method, which can be applied to the control device 400 in the above-mentioned wireless charging foreign object temperature detection system. Among them, the control device includes but is not limited to mobile phones (including foldable screen mobile phones), tablet computers, personal computers, workstation devices, large-screen devices (such as smart screens, smart TVs, etc.), wearable devices (such as smart bracelets, smart watches), handheld game consoles, home game consoles, virtual reality devices, augmented reality devices, mixed reality devices, etc., in-vehicle smart terminals, PLC (Programmable Logic Controller) devices, etc.

[0150] Figure 18 This is a schematic diagram of the hardware structure of the control device provided in the embodiment of the present application. Figure 18 As shown, the control device 400 may include a processor 410, a memory 420, a display screen 430, a radio frequency circuit 440, an external device interface 450, a wireless communication module 460, and the like.

[0151] The processor 410 may include one or more processing units, for example: the processor 410 may include an application processor (AP), a modem processor, a graphics processing unit (GPU), an image signal processor (ISP), a video codec, a digital signal processor (DSP), a baseband processor, and / or a neural-network processing unit (NPU), etc. Among them, different processing units can be independent devices or integrated into one or more processors, for example, integrated into a system on a chip (SOC). A memory may also be provided in the processor 410 for storing instructions and data. In some implementations, the memory in the processor 410 is a high-speed cache memory. The memory can save instructions or data that the processor 410 has just used or recycled.

[0152] In some implementations, the processor 410 may include one or more interfaces. The interfaces may include an inter-integrated circuit (I2C) interface, an inter-integrated circuit sound (I2S) interface, a pulse code modulation (PCM) interface, a universal asynchronous receiver / transmitter (UART) interface, a mobile industry processor interface (MIPI), a general-purpose input / output (GPIO) interface, a subscriber identity module (SIM) interface, and / or a universal serial bus (USB) interface.

[0153] The memory 420 can be used to store computer executable program code, which includes instructions. The memory 420 may include a program storage area and a data storage area. The program storage area may store an operating system, application programs required for at least one function (such as a sound playback function, an image playback function, etc.), etc. The data storage area may store data created during the use of the control device 400 (such as mapping relationship data related to foreign object temperature detection, detection records, etc.). In addition, the memory 420 may include one or more storage units, for example, volatile memory (volatile memory), such as dynamic random access memory (DRAM), static random access memory (SRAM), etc.; it may also include non-volatile memory (NVM), such as read-only memory (ROM), flash memory, etc. The processor 410 executes various functional applications and data processing of the control device 400 by running instructions stored in the memory 420 and / or instructions stored in a memory provided in the processor.

[0154] The wireless communication function of the control device 400 can be implemented through the radio frequency circuit 440, the wireless communication module 460, the modem processor and the baseband processor.

[0155] The radio frequency circuit 440 may include at least one antenna 141 for transmitting and receiving electromagnetic wave signals. Each antenna in the control device 400 may be used to cover a single or multiple communication frequency bands. In some implementations, the antenna may be used in conjunction with a tuning switch.

[0156] The control device 400 may include one or M external device interfaces 450, where M is a positive integer greater than 1. The external device interface 450 is used to connect an external device to the control device 400 via a wired connection. The external device includes, but is not limited to, the wireless transmitter 100, the temperature sensor 301, the scanning device 500, and the controlled device in the driving device 600 (e.g., a robotic arm, a motor, etc.).

[0157] The modem processor may include a modulator and a demodulator. The modulator is used to modulate the low-frequency baseband signal to be transmitted into a medium-high frequency signal. The demodulator is used to demodulate the received electromagnetic wave signal into a low-frequency baseband signal. The demodulator then transmits the demodulated low-frequency baseband signal to the baseband processor for processing. After being processed by the baseband processor, the low-frequency baseband signal is passed to the application processor. The application processor outputs a sound signal through an audio device (including but not limited to a speaker, a receiver, etc.) or displays an image or video through the display screen 430. In some implementations, the modem processor may be an independent device. In other embodiments, the modem processor may be independent of the processor 410 and be provided in the same device as other functional modules.

[0158] The wireless communication module 460 may include a wireless fidelity (Wi-Fi) module, a Bluetooth (BT) module, a WLAN (Wireless Local Area Networks) module, a near field communication (NFC) module, an FM (Frequency Modulation) module, an infrared (IR) module, and the like. The wireless communication module 460 may be one or more devices integrating at least one of the above modules. The wireless communication module 460 receives electromagnetic waves via the antenna 141, frequency modulates and filters the electromagnetic wave signals, and sends the processed signals to the processor 410. The wireless communication module 460 may also receive signals to be transmitted from the processor 410, frequency modulate them, amplify them, and convert them into electromagnetic waves for radiation via the antenna 141.

[0159] The control device 400 can communicate and interact with other devices in the wireless charging foreign object temperature detection system in a wired or wireless manner through the external device interface 450 and the wireless communication module 460, thereby issuing instructions to other devices in the detection system and receiving information and data sent by other devices in the detection system.

[0160] The display screen 430 is used to display images, videos, etc., for example, Figure 16The temperature data corresponding to the foreign object movement path shown. The display screen 430 includes a display panel. The display panel can be a liquid crystal display (LCD), an organic light-emitting diode (OLED), an active matrix organic light-emitting diode or an active matrix organic light-emitting diode (AMOLED), a flexible light-emitting diode (FLED), a MiniLED, a MicroLED, a Micro-OLED, a quantum dot light-emitting diode (QLED), etc. In some implementations, the control device 400 may include 1 or N display screens 430, where N is a positive integer greater than 1.

[0161] It should be understood that the structure illustrated in the embodiments of the present application does not constitute a specific limitation on the control device 400. In other embodiments of the present application, the control device may include more or fewer components than shown, or may combine or separate certain components, or arrange the components differently. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

[0162] The following is an exemplary description of the various steps of the method for detecting temperature of foreign objects in wireless charging provided in an embodiment of the present application.

[0163] Figure 19 This is the first flow chart of a method for detecting temperature of foreign objects in wireless charging provided by an embodiment of the present application.

[0164] like Figure 19 As shown, the method includes:

[0165] Step S191: Acquire coil area information of the wireless transmitter detected and sent by the scanning device.

[0166] Step S192: Setting a point to be detected within the coil area according to the coil area information.

[0167] Step S193: Control the wireless transmitter to start the maximum transmission power.

[0168] Step S194: Control the driving device to move the foreign matter sample to the point to be detected.

[0169] Step S195 , obtaining temperature data of the foreign matter sample detected by the temperature sensor at the point to be detected, and storing a mapping relationship between the current foreign matter sample type, the position information of the point to be detected and the temperature data.

[0170] According to step S194 and step S195, all the points to be detected are traversed, and the mapping relationship between the position information of each point to be detected (for example, in the form of coordinates) and the temperature data of the foreign body sample detected by the temperature sensor at the point to be detected is recorded. Afterwards, the type of foreign body sample can be switched, and step S194 and step S195 can be continued until the temperature detection process of all types of foreign body samples is completed in detection scene one. Alternatively, instead of switching the type of foreign body sample, the detection scene can be switched, for example, switching to detection scene two, detection scene three or detection scene four, and the temperature detection process of the current type of foreign body sample in other detection scenes can be continued.

[0171] Figure 19 The steps included in the provided method can be implemented with reference to the configuration of the control device 400 in the aforementioned wireless charging foreign object temperature detection system, and will not be repeated here.

[0172] Figure 20 This is the second flow chart of a method for detecting temperature of foreign objects in wireless charging provided in an embodiment of the present application.

[0173] like Figure 20 As shown, the method includes:

[0174] Step S201: Acquire coil area information of a wireless transmitter detected and sent by a scanning device.

[0175] Step S202: Setting a point to be detected in the coil area according to the coil area information.

[0176] Step S203: Control the wireless transmitter to start the maximum transmission power.

[0177] Step S204 , controlling the driving device to adjust the position of the wireless receiver so that there is a target distance between the wireless receiver and the foreign body sample.

[0178] Step S205 , controlling the driving device to move the foreign matter sample to the point to be detected.

[0179] Step S206 , obtaining temperature data of the foreign matter sample detected by the temperature sensor at the point to be detected, and storing a mapping relationship between the current foreign matter sample type, target distance, position information of the point to be detected, and temperature data.

[0180] According to step S205 and step S206, all the points to be detected are traversed, and the mapping relationship between the current foreign body sample type, target spacing, position information of each point to be detected (for example, in the form of coordinates) and the temperature data of the foreign body sample detected by the temperature sensor at the point to be detected is recorded. Afterwards, the type of foreign body sample can be switched, and steps S205 and S206 can be continued until the temperature detection process of all types of foreign body samples is completed in the current detection scene. Alternatively, the type of foreign body sample can be switched, but the detection scene can be switched instead, and the temperature detection process of the current type of foreign body sample in other detection scenes can be continued.

[0181] Figure 20 The steps included in the provided method can be implemented with reference to the functions of the control device 400 in the aforementioned wireless charging foreign object temperature detection system, and will not be repeated here.

[0182] The embodiment of the present application detects the coil area information of the wireless transmitter through a scanning device, and provides an accurate reference for the control device to determine the distribution of the points to be detected and the moving path of the foreign body sample, so that the foreign body temperature detection process can be carried out within the coil coverage area of ​​the wireless transmitter, avoiding the temperature detection of invalid points to be detected, thereby improving the detection efficiency and accuracy. The control device controls the driving mechanism to move the foreign body sample and the wireless receiver, realizes the automatic switching of the points to be detected along the preset path, and automatically adjusts the distance between the foreign body sample and the wireless receiver according to the requirements of the detection scenario, realizes the automated control of the wireless charging foreign body temperature detection process, reduces the manual operation of the tester, and improves the detection efficiency. The control device can accurately store the mapping relationship between the type of foreign body sample, the coordinates of the point to be detected, the distance between the foreign body sample and the wireless receiver, and the temperature data, thereby providing accurate data support for subsequent retesting, facilitating accurate retesting.

[0183] Figure 21 This is a schematic diagram of the structure of a wireless charging foreign body temperature detection device provided by an embodiment of the present application. In some implementations, the control device can be Figure 21 The hardware devices shown in the figure implement the corresponding functions. Figure 21 As shown, the wireless charging foreign object temperature detection device may include: a display screen 211, a memory 212 and a processor 213.

[0184] In some implementations, the display screen 211 is used to display images, specifically, it can be used to display Figure 16The temperature data corresponding to the foreign object movement path shown. The processor 213 may include one or more processing units, for example: the processor 213 may include an application processor, a modem processor, a graphics processor, an image signal processor, a controller, a video codec, a digital signal processor, a baseband processor, and / or a neural network processor, etc. Among them, different processing units can be independent devices or integrated into one or more processors. The memory 212 is coupled to the processor 213 for storing various software programs and / or multiple sets of instructions. The memory 212 may include a volatile memory and / or a non-volatile memory. When the software programs and / or multiple sets of instructions in the memory 212 are executed by the processor 213, the control device realizes the functions of the control device 400 in the above wireless charging foreign object temperature detection system, which will not be repeated here.

[0185] Figure 22 This is a schematic diagram of the structure of another wireless charging foreign body temperature detection device provided by the embodiment of the present application. In some implementations, the control device 400 can Figure 22 The software devices shown in the figure realize the corresponding functions. Figure 22 As shown, the wireless charging foreign body temperature detection device may include: an information receiving module 221, a detection point setting module 222, a control module 223, a temperature data acquisition module 224, and a storage module 225. Among them, the information receiving module 221 is used to obtain coil area information detected by the scanning device, the coil area information being the position distribution information of the coil area, which is the projection area of ​​the first coil on the first surface, and the first surface being the contact surface of the wireless transmitter with the foreign body sample; the detection point setting module 222 is used to set the detection point within the coil area based on the coil area information; the control module 223 is used to control the wireless transmitter to start the maximum transmission power and control the driving device to move the foreign body sample to the detection point; the temperature data acquisition module 224 is used to obtain temperature data detected by the temperature sensor on the foreign body sample at the detection point; and the storage module 225 is used to store the mapping relationship between the type of foreign body sample, the location information of the detection point, and the temperature data. In this way, the control device uses the coil area information as a reference to set the points to be detected, ensuring that all the points to be detected are located within the coil area and filtering out invalid points outside the coil area, thereby improving the efficiency of foreign object temperature detection. In addition, the control device controls the drive device to move the foreign object sample to the designated point to be detected based on the location information of the point to be detected, achieving automatic and precise positioning of the foreign object sample. This ensures that the mapping relationship between the type of foreign object sample, the location information of the point to be detected, and the temperature data is accurate and reliable, thereby improving the detection accuracy and efficiency of the wireless charging foreign object temperature detection system.

[0186] In some implementations, the wireless charging foreign body temperature detection system further includes: a wireless receiver. Before controlling the driving device to move the foreign body sample to the point to be detected, the control module 223 is also used to control the driving device to move the wireless receiver to the target detection position; wherein, the target detection position is located in the projection area of ​​the first surface, and after the foreign body sample is moved to the point to be detected, there is a target distance between the wireless receiver and the foreign body sample. The storage module 225 is also used to save the mapping relationship between the type of foreign body sample, the target distance, the position information of the point to be detected, and the temperature data. In this way, it is possible to determine whether the wireless receiver participates in the test according to different detection scenario requirements, and the control device controls the driving device to adjust the distance between the wireless receiver and the foreign body sample, thereby realizing automatic and precise positioning of the wireless receiver, making the mapping relationship between the stored foreign body sample type, target distance, detection point position information, and temperature data accurate and reliable, thereby improving the detection accuracy and detection efficiency of the wireless charging foreign body temperature detection system.

[0187] In some implementations, the drive device includes a first motor, a lifting rod, a first sliding member, and a first bracket; the first bracket includes a first support rod and a support frame; the lifting rod is parallel to the Z-axis, which is a coordinate axis perpendicular to the first surface; the first motor is connected to the fixed end of the lifting rod, the movable end of the lifting rod is perpendicularly connected to the first support rod via the first sliding member, and the support frame is connected to the end of the first support rod distal from the first sliding member. Before the information receiving module 221 obtains the coil area information, the control module 223 is further configured to: control the drive device to place the scanning device on the support frame and align the support frame with the first surface; adjust the length of the lifting rod by controlling the operating state of the first motor to drive the first sliding member and the first bracket to move along the Z-axis, so that the scanning device moves to a preset scanning height in the Z-axis; and activate the scanning device when the scanning device reaches the preset scanning height. After the information receiving module 221 receives the coil area information sent by the scanning device, the control module 223 is further configured to deactivate the scanning device and control the drive device to remove the scanning device from the support frame. In this way, the control device can control the driving device to move the scanning device to the target scanning height in the Z-axis direction, so that the scanning device can accurately detect the coil area information of the wireless transmitter, thereby providing an accurate reference for the control device to set the point to be detected, and the control device can control the start and stop of the scanning device, as well as control the positioning and removal of the scanning device on the support frame, thereby improving the detection accuracy and detection efficiency of the wireless charging foreign object temperature detection system.

[0188] In some implementations, the drive device further includes a second motor, a second connecting rod, a second sliding member, and a second support rod; the second connecting rod is parallel to the X-axis direction, and the second support rod is parallel to the Y-axis direction, where the X-axis and Y-axis are mutually perpendicular coordinate axes set within the detection plane, and the detection plane is the plane where the wireless transmitter is placed; the second motor is connected to the fixed end of the second connecting rod, and the movable end of the second connecting rod is connected to the second support rod via the second sliding member; and the end of the second support rod away from the second sliding member is detachably connected to the foreign object sample. The control module 223 is specifically configured to: control the drive device to place the foreign object sample on the first surface; by controlling the operating state of the second motor, adjust the telescopic state of the second connecting rod to drive the second sliding member and the second support rod to move along the X-axis direction, so that the foreign object sample moves to the position corresponding to the X-axis coordinate of the current point to be detected. In this way, the control device can control the drive device to adjust the X-axis coordinate of the foreign object sample on the first surface, so that the foreign object sample moves to the position corresponding to the X-axis coordinate of the current point to be detected, thereby achieving automatic and precise positioning of the foreign object sample in the X-axis direction, thereby improving the detection accuracy and detection efficiency of the wireless charging foreign object temperature detection system.

[0189] In some implementations, the drive device further includes a third motor, a third connecting rod, a third sliding component, and a third support rod; the third connecting rod is parallel to the Y-axis direction, and the third support rod is parallel to the X-axis direction; the third motor is connected to the fixed end of the third connecting rod, the movable end of the third connecting rod is connected to the third support rod via the third sliding component, and the end of the third support rod away from the third sliding component is detachably connected to the foreign body sample. The control module 223 is specifically used to: by controlling the operating state of the third motor, adjust the telescopic state of the third connecting rod to drive the third sliding component and the third support rod to move along the Y-axis direction, so that the foreign body sample moves to the position corresponding to the Y-axis coordinate of the current point to be detected. In this way, the control device can control the drive device to adjust the Y-axis coordinate of the foreign body sample on the first surface, so that the foreign body sample moves to the position corresponding to the Y-axis coordinate of the current point to be detected, thereby realizing automatic and precise positioning of the foreign body sample in the Y-axis direction, thereby improving the detection accuracy and detection efficiency of the wireless charging foreign body temperature detection system.

[0190] In some implementations, the temperature data acquisition module 224 is further configured to acquire temperature data corresponding to the current detection point detected by the temperature sensor when the foreign object sample moves to the position corresponding to the X-axis and Y-axis coordinates of the current detection point. In this way, the control device acquires temperature data detected by the temperature sensor after the foreign object sample moves to the position corresponding to the current detection point, making the mapping relationship between the temperature data and the position coordinates of the current detection point more accurate, thereby improving the detection accuracy of the wireless charging foreign object temperature detection system.

[0191] In some implementations, the control module 223 is specifically used to: control the driving device to place the wireless receiver on the support frame and align the support frame with the first surface; by controlling the operating state of the first motor, adjust the length of the lifting rod to drive the first sliding component and the first bracket to move along the Z-axis direction, so that the support frame moves to the target detection height in the Z-axis direction; wherein the target detection height is calculated based on the thickness of the wireless transmitter, the thickness of the foreign body sample, the thickness of the support frame, and the target spacing; when the support frame moves to the target detection height, control the driving device to move the foreign body sample to the point to be detected. In this way, the control device can control the driving device support frame to move to the target detection height so that there is a target spacing between the wireless receiver and the foreign body sample, meet the requirements of different detection scenarios, and realize automatic and precise positioning of the wireless receiver, so that the mapping relationship between the stored foreign body sample type, target spacing, detection point location information and temperature data is accurate and reliable, thereby improving the detection accuracy and detection efficiency of the wireless charging foreign body temperature detection system.

[0192] In some implementations, the first sliding component includes a first positioning device for detecting the Z-axis coordinate of the first sliding component. The wireless charging foreign object temperature detection device may further include a position data acquisition module. The position data acquisition module is configured to acquire the Z-axis coordinate of the first sliding component detected by the first positioning device when the first sliding component stops moving, after the first sliding component begins moving along the Z-axis. The control module 223 is further configured to perform height correction on the support frame based on the deviation between the target detection height and the Z-axis coordinate of the first sliding component. Thus, the support frame height is verified by comparing the Z-axis coordinate of the first sliding component detected by the first positioning device with the target detection height. If there is no deviation between the two, the support frame is accurately positioned. If there is a deviation between the Z-axis coordinate of the first sliding component and the target detection height, the support frame has not reached the target detection height. The control device can correct the support frame height based on the deviation to ensure that the distance between the wireless receiver and the foreign object sample is equal to the target distance. This ensures that the stored mapping between the type of foreign object sample, the target distance, the location information of the detection point, and the temperature data is accurate and reliable, thereby improving the detection accuracy and efficiency of the wireless charging foreign object temperature detection system.

[0193] In some implementations, the second sliding component includes a second positioning device for detecting the X-axis coordinate of the second sliding component, and the third sliding component includes a third positioning device for detecting the Y-axis coordinate of the third sliding component. The position data acquisition module is further configured to: after the second sliding component begins to move in the X-axis direction, acquire the X-axis coordinate of the second sliding component detected by the second positioning device when the second sliding component stops moving; and after the third sliding component begins to move in the Y-axis direction, acquire the Y-axis coordinate of the third sliding component detected by the third positioning device when the third sliding component stops moving. The control module 223 is further configured to: perform position correction on the foreign matter sample based on the deviation between the X-axis coordinate of the current point to be detected and the X-axis coordinate of the second sliding component, and / or the deviation between the Y-axis coordinate of the current point to be detected and the Y-axis coordinate of the third sliding component. In this way, the current position of the foreign matter sample on the first surface can be determined based on the X-axis coordinate of the second sliding component and the Y-axis coordinate of the third sliding component. By comparing the current position coordinate of the foreign matter sample with the coordinates of the current point to be detected, it can be detected whether the foreign matter sample has moved to the current point to be detected. If at least one of the current X-axis coordinates and Y-axis coordinates of the foreign object sample does not match the current point to be detected, the position of the foreign object sample is corrected to make the mapping relationship between the type of stored foreign object sample (including or excluding the target distance), the position coordinates of the detection point and the temperature data accurate and reliable, thereby improving the detection accuracy and efficiency of the wireless charging foreign object temperature detection system.

[0194] In some implementations, the drive device may further include a fourth motor, a rotating component, a fifth motor, and a fourth connecting rod; the central axis of the rotating component is parallel to the Z-axis and is disposed at the fixed end of the lifting rod; the fourth motor is connected to the rotating component; the fourth connecting rod is perpendicular to the central axis of the rotating component, the fixed end of the fourth connecting rod is connected to the rotating component, and the movable end of the fourth connecting rod is detachably connected to the foreign body sample; and the fifth motor is connected to the fourth connecting rod. The control module 223 is specifically configured to: control the drive device to place the foreign body sample on the first surface; calculate the target length and target angle of the fourth connecting rod relative to the X-axis based on the X-axis coordinates and Y-axis coordinates of the current point to be detected; drive the rotating component to rotate about the Z-axis by controlling the operating state of the fourth motor so that the angle between the fourth connecting rod and the X-axis is equal to the target angle; and adjust the length of the fourth connecting rod to the target length by controlling the operating state of the fifth motor. The temperature data acquisition module 224 is further configured to acquire temperature data corresponding to the current point to be detected detected by the temperature sensor when the angle between the fourth connecting rod and the X-axis is equal to the target angle and the length of the fourth connecting rod is adjusted to the target length. In this way, the control device can match the target length of the fourth link and the target angle relative to the X-axis direction according to the current coordinates to be detected, and by rotating and extending the fourth link, the foreign body sample connected to the fourth link can be accurately moved to the current point to be detected, thereby achieving precise movement and positioning of the foreign body sample, and making the mapping relationship between the type of stored foreign body samples (including or excluding the target spacing), the position coordinates of the detection point and the temperature data accurate and reliable, thereby improving the detection accuracy and detection efficiency of the wireless charging foreign body temperature detection system.

[0195] In some implementations, the control module 223 is further configured to: detect whether the temperature of the foreign body sample remains unchanged for a preset time period based on the temperature data of the current detection point; if the temperature of the foreign body sample does not remain unchanged for the preset time period, control the temperature data acquisition module 224 to continue acquiring the temperature data detected by the temperature sensor at the current detection point; if the temperature of the foreign body sample remains unchanged for the preset time period, control the drive device to move the foreign body sample to the next detection point after the current detection point. In this way, the control device monitors the change pattern of the temperature data of the foreign body sample to detect whether the temperature of the foreign body sample remains unchanged for a preset time period. If the temperature of the foreign body sample remains unchanged for the preset time period, it indicates that the temperature of the foreign body sample at the current detection point has stabilized and the foreign body temperature detection at the current detection point is complete. The drive device can be controlled to move the foreign body sample to the next detection point to avoid the foreign body sample staying at the detection point for too long, thereby improving the detection efficiency of the wireless charging foreign body temperature detection system.

[0196] In some implementations, the wireless charging foreign body temperature detection device may further include a timing module. Before controlling the driving device to move the foreign body sample to the next point to be detected of the current point to be detected, the control module 223 is also used to: if it is detected that the temperature of the foreign body sample remains unchanged within a preset time period, control the wireless transmitter to reduce the transmission power or turn off the wireless transmitter. The timing module is used to control the timer to start timing. The control module 223 is also used to: when it is detected that the timing time reaches the preset time threshold, control the driving device to move the foreign body sample to the next point to be detected, and control the wireless transmitter to transmit the maximum transmission power. Since the temperature rise characteristics of foreign bodies at different points to be detected are different, in order to ensure the detection accuracy, the foreign body sample can be cooled before being moved to the next point to be detected. When the control device detects that the temperature of the foreign object sample remains unchanged within a preset time period, it controls the wireless transmitter to reduce the transmission power or turn off the wireless transmitter, and uses a timing method to quickly cool the foreign object sample within a preset time threshold. The foreign object sample is then moved to the next point to be detected and the temperature data at the next point to be detected is measured, thereby ensuring the accuracy of the temperature data when the foreign object sample switches to the point to be detected, thereby improving the detection accuracy of the wireless charging foreign object temperature detection system.

[0197] In some implementations, the control module 223 is further configured to: before controlling the driving device to move the foreign body sample to the next point to be detected of the current point to be detected, if it is detected that the temperature of the foreign body sample remains unchanged for a preset time period, control the wireless transmitter to reduce the transmission power or turn off the wireless transmitter; when it is detected that the temperature of the foreign body sample drops to a preset temperature, or when it is detected that the temperature drop of the foreign body sample reaches a preset ratio, control the driving device to move the foreign body sample to the next point to be detected, and control the wireless transmitter to transmit at maximum transmission power. In this way, before moving the foreign body sample to the next point to be detected, the foreign body sample can be lowered to a preset temperature (e.g., room temperature), or the temperature drop of the foreign body sample reaches a preset ratio, thereby ensuring the accuracy of the temperature data when the foreign body sample switches to the point to be detected, thereby improving the detection accuracy of the wireless charging foreign body temperature detection system.

[0198] In some implementations, the wireless transmitter also includes a protective device, which is located within the coverage area of ​​the first coil and is used to reduce the transmission power of the wireless transmitter when a metal foreign object is detected in the protection area. The protection area is the projection area of ​​the protective device on the first surface. The information receiving module 221 is also used to receive the coil area information and protection area information sent by the scanning device after the scanning device is turned on. The protection area information is the position distribution information of the protection area on the first surface. In this way, the protection device is provided in the wireless transmitter to prevent the wireless transmitter, foreign object sample and wireless receiver from being burned by high temperature. The scanning device can also detect the protection area information, thereby providing a reference for the classification of the points to be detected.

[0199] In some implementations, the wireless charging foreign body temperature detection device also includes a screening module and a path setting module. After the detection point setting module 222 sets the detection point within the coil area, the screening module is used to: screen the detection point according to the protection area information, obtain the first detection point outside the protection area, and obtain the second detection point inside the protection area. The path setting module is used to set the first path for the movement of the foreign body sample according to the first detection point, and set the second path for the movement of the foreign body sample according to the second detection point. The control module 223 is also used to: control the driving device to cool down the foreign body sample before switching the first detection point where the foreign body sample is located within the first path; and control the driving device not to cool down the foreign body sample before switching the second detection point where the foreign body sample is located within the second path. In the same detection scenario, the control device can control the switching of the foreign matter sample to the detection point according to the first path and the second path respectively, and implement the cooling strategy for the foreign matter sample only before switching the first detection point under the first path. There is no need to implement the cooling strategy for the foreign matter sample throughout the second path, thereby reducing the cooling time generated by traversing all detection points and improving the efficiency of foreign matter temperature detection.

[0200] The embodiment of the present application also provides a chip system, Figure 23 Schematic diagram of the chip system. The chip system includes a processor 231 for supporting the above-mentioned device to implement the functions of the control device involved in the above aspects, for example, generating or processing the information involved in the above-mentioned method. In one possible design, the chip system also includes a memory 232 for storing the computer instructions 233 and data necessary for the wireless charging foreign object temperature detection device. The chip system can be composed of a chip or include a chip and other discrete devices.

[0201] An embodiment of the present application further provides a computer-readable storage medium, which stores instructions. When the computer-readable storage medium is executed on a computer, the computer implements the functions of the control device involved in the above aspects.

[0202] An embodiment of the present application further provides a computer program product comprising instructions, which, when executed on a computer, enables the computer to implement the functions of the control device involved in the above aspects.

[0203] The above specific implementation methods further explain in detail the purpose, technical solutions and beneficial effects of the embodiments of the present application. It should be understood that the above are only specific implementation methods of the embodiments of the present application and are not intended to limit the scope of protection of the embodiments of the present application. Any modifications, equivalent replacements, improvements, etc. made on the basis of the technical solutions of the embodiments of the present application should be included in the scope of protection of the embodiments of the present application.

Claims

1. A wireless charging foreign object temperature detection system, characterized in that: include: A wireless transmitter, a foreign body sample equipped with a temperature sensor, a control device, a scanning device and a driving device; wherein the wireless transmitter includes a first coil; The control device is used to: Acquiring coil area information detected by the scanning device, wherein the coil area information is position distribution information of the coil area, and the coil area is a projection area of ​​the first coil on a first surface, and the first surface is a contact surface of the wireless transmitter with the foreign body sample; According to the coil area information, a point to be detected is set in the coil area; Controlling the wireless transmitter to start the maximum transmission power, and controlling the driving device to move the foreign body sample to the point to be detected; The temperature data of the foreign matter sample detected by the temperature sensor at the point to be detected is acquired, and a mapping relationship between the type of the foreign matter sample, the position information of the point to be detected, and the temperature data is saved.

2. The system according to claim 1, wherein: Also includes: Wireless receiver; The control device is also used to: Before controlling the driving device to move the foreign matter sample to the point to be detected, controlling the driving device to move the wireless receiver to a target detection position; wherein the target detection position is located in the projection area of ​​the first surface, and after the foreign matter sample is moved to the point to be detected, a target distance is formed between the wireless receiver and the foreign matter sample; The mapping relationship between the type of the foreign matter sample, the target distance, the position information of the point to be detected, and the temperature data is saved.

3. The system according to claim 2, characterized in that The driving device includes a first motor, a lifting rod, a first sliding component and a first bracket; the first bracket includes a first support rod and a support frame; the lifting rod is parallel to the Z-axis, which is a coordinate axis perpendicular to the first surface; the first motor is connected to the fixed end of the lifting rod, the movable end of the lifting rod is vertically connected to the first support rod via the first sliding component, and the support frame is connected to the end of the first support rod away from the first sliding component; The control device is also used to: Before acquiring the coil area information, controlling the driving device to place the scanning device on the support frame and aligning the support frame with the first surface; By controlling the operating state of the first motor and adjusting the length of the lifting rod, the first sliding component and the first bracket are driven to move along the Z-axis direction, so that the scanning device moves to a preset scanning height in the Z-axis direction; When the scanning device moves to the preset scanning height, turning on the scanning device; After receiving the coil area information sent by the scanning device, the scanning device is turned off, and the driving device is controlled to remove the scanning device from the support frame.

4. The system according to claim 3, characterized in that The driving device also includes a second motor, a second connecting rod, a second sliding component and a second support rod; the second connecting rod is parallel to the X-axis direction, and the second support rod is parallel to the Y-axis direction, and the X-axis and the Y-axis are mutually perpendicular coordinate axes set in the detection plane, and the detection plane is the plane where the wireless transmitter is placed; the second motor is connected to the fixed end of the second connecting rod, and the movable end of the second connecting rod is connected to the second support rod via the second sliding component; the end of the second support rod away from the second sliding component is detachably connected to the foreign body sample; The control device is used to control the driving device to move the foreign matter sample to the point to be detected, specifically including: controlling the driving device to place the foreign matter sample on the first surface; By controlling the operating state of the second motor and adjusting the telescopic state of the second connecting rod, the second sliding component and the second support rod are driven to move along the X-axis direction, so that the foreign body sample moves to the position corresponding to the X-axis coordinate of the current point to be detected.

5. The system according to claim 4, characterized in that The driving device further includes a third motor, a third connecting rod, a third sliding component and a third supporting rod; the third connecting rod is parallel to the Y-axis direction, and the third supporting rod is parallel to the X-axis direction; The third motor is connected to the fixed end of the third connecting rod, the movable end of the third connecting rod is connected to the third support rod via the third sliding component, and one end of the third support rod away from the third sliding component is detachably connected to the foreign body sample; The control device is used to control the driving device to move the foreign matter sample to the point to be detected, and further includes: By controlling the operating state of the third motor and adjusting the telescopic state of the third connecting rod, the third sliding component and the third support rod are driven to move along the Y-axis direction, so that the foreign body sample moves to the position corresponding to the Y-axis coordinate of the current point to be detected.

6. The system according to claim 5, characterized in that The control device is also used to: When the foreign matter sample moves to a position corresponding to the X-axis coordinate and the Y-axis coordinate of the current point to be detected, temperature data corresponding to the current point to be detected detected by the temperature sensor is acquired.

7. The system according to claim 3, wherein: The control device is used to control the driving device to move the wireless receiver to the target detection position, specifically including: controlling the driving device to place the wireless receiver on the support frame and align the support frame with the first surface; By controlling the operating state of the first motor and adjusting the length of the lifting rod, the first sliding member and the first bracket are driven to move along the Z-axis direction, so that the support frame moves to a target detection height in the Z-axis direction; wherein the target detection height is calculated based on the thickness of the wireless transmitter, the thickness of the foreign object sample, the thickness of the support frame, and the target spacing; When the support frame moves to the target detection height, the driving device is controlled to move the foreign matter sample to the point to be detected.

8. The system according to claim 7, characterized in that The first sliding component includes a first positioning device for detecting the Z-axis coordinate of the first sliding component, and the control device is further used to: After the first sliding component starts to move along the Z-axis direction, acquiring the Z-axis coordinate of the first sliding component detected by the first positioning device when the first sliding component stops moving; The support frame is height-corrected according to a deviation between the target detection height and the Z-axis coordinate of the first sliding component.

9. The system according to claim 5, characterized in that The second sliding component includes a second positioning device for detecting the X-axis coordinate of the second sliding component, and the third sliding component includes a third positioning device for detecting the Y-axis coordinate of the third sliding component. The control device is further used to: After the second sliding component starts to move along the X-axis direction, acquiring the X-axis coordinate of the second sliding component detected by the second positioning device when the second sliding component stops moving; After the third sliding component starts to move along the Y-axis direction, acquiring the Y-axis coordinate of the third sliding component detected by the third positioning device when the third sliding component stops moving; The position of the foreign matter sample is corrected according to the deviation between the X-axis coordinate of the current point to be detected and the X-axis coordinate of the second sliding component, and / or the deviation between the Y-axis coordinate of the current point to be detected and the Y-axis coordinate of the third sliding component.

10. The system according to claim 3, wherein: The driving device further includes a fourth motor, a rotating component, a fifth motor and a fourth connecting rod; the central axis of the rotating component is parallel to the Z-axis direction and is arranged at the fixed end of the lifting rod; the fourth motor is connected to the rotating component; the fourth connecting rod is perpendicular to the central axis of the rotating component, the fixed end of the fourth connecting rod is connected to the rotating component, and the movable end of the fourth connecting rod is detachably connected to the foreign body sample; the fifth motor is connected to the fourth connecting rod; The control device is used to control the driving device to move the foreign matter sample to the point to be detected, specifically including: controlling the driving device to place the foreign matter sample on the first surface; Calculating the target length and the target angle of the fourth connecting rod relative to the X-axis direction according to the X-axis coordinate and the Y-axis coordinate of the current point to be detected; By controlling the operating state of the fourth motor, the rotating component is driven to rotate around the Z-axis so that the angle between the fourth connecting rod and the X-axis is equal to the target angle; adjusting the length of the fourth connecting rod to the target length by controlling the operating state of the fifth motor; When the angle between the fourth connecting rod and the X-axis is equal to the target angle and the length of the fourth connecting rod is adjusted to the target length, temperature data corresponding to the current point to be detected detected by the temperature sensor is acquired.

11. The system according to claim 6 or 10, characterized in that The control device is also used to: Detecting whether the temperature of the foreign matter sample remains unchanged within a preset time period based on the temperature data of the current point to be detected; If the temperature of the foreign matter sample does not remain unchanged within the preset time period, continue to obtain the temperature data detected by the temperature sensor at the current point to be detected; If the temperature of the foreign matter sample remains unchanged within a preset time period, the driving device is controlled to move the foreign matter sample to a point to be detected next to the current point to be detected.

12. The system according to claim 11, wherein: The control device is also used to: Before controlling the driving device to move the foreign matter sample to a point next to the current point to be detected, if it is detected that the temperature of the foreign matter sample remains unchanged within the preset time period, controlling the wireless transmitter to reduce the transmission power or turn off the wireless transmitter, and controlling the timer to start timing; When it is detected that the timing time reaches a preset time threshold, the driving device is controlled to move the foreign matter sample to the next point to be detected, and the wireless transmitter is controlled to transmit the maximum transmission power.

13. The system according to claim 11, wherein: The control device is also used to: Before controlling the driving device to move the foreign matter sample to a point next to the current point to be detected, if it is detected that the temperature of the foreign matter sample remains unchanged within the preset time period, controlling the wireless transmitter to reduce the transmission power or turn off the wireless transmitter; When it is detected that the temperature of the foreign body sample drops to a preset temperature, or when it is detected that the temperature drop of the foreign body sample reaches a preset ratio, the driving device is controlled to move the foreign body sample to the next point to be detected, and the wireless transmitter is controlled to transmit the maximum transmission power.

14. The system according to any one of claims 12-13, characterized in that: The wireless transmitter further includes a protection device, the protection device being located within a coverage area of ​​the first coil and configured to reduce the transmission power of the wireless transmitter when a metal foreign object is detected within the protection area, the protection area being a projection area of ​​the protection device on the first surface; The control device is also used to: After the scanning device is turned on, the coil area information and protection area information sent by the scanning device are received, where the protection area information is position distribution information of the protection area on the first surface.

15. The system according to claim 14, wherein: The control device is further configured to execute: After setting the points to be detected in the coil area, obtaining a first point to be detected outside the protection area and a second point to be detected inside the protection area according to the protection area information; Setting a first path for the movement of the foreign matter sample according to the first point to be detected, and setting a second path for the movement of the foreign matter sample according to the second point to be detected; Controlling the driving device to cool the foreign matter sample before switching the foreign matter sample to the first point to be detected in the first path; The driving device is controlled not to cool the foreign matter sample before switching the foreign matter sample to the second point to be detected in the second path.

16. A method for detecting temperature of foreign objects in wireless charging, characterized in that: The method applied to the wireless charging foreign object temperature detection system according to any one of claims 1 to 15 comprises: Acquiring coil area information detected by the scanning device, wherein the coil area information is position distribution information of the coil area, and the coil area is a projection area of ​​the first coil on a first surface, and the first surface is a contact surface of the wireless transmitter with the foreign body sample; According to the coil area information, a point to be detected is set in the coil area; Controlling the wireless transmitter to start the maximum transmission power, and controlling the driving device to move the foreign body sample to the point to be detected; The temperature data of the foreign matter sample detected by the temperature sensor at the point to be detected is acquired, and a mapping relationship between the type of the foreign matter sample, the position information of the point to be detected, and the temperature data is saved.

17. A chip system, characterized in that: It comprises a memory and a processor; the memory and the processor are coupled; the memory is used to store computer program instructions, and when the processor executes the computer program instructions, the chip system realizes the function of the control device in any one of claims 1-15.

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