Wireless charging auxiliary calibration test device and test method

Abstract

The application discloses a wireless charging auxiliary calibration testing device and testing method, which comprises an installation platform, a calibration coil array and a controller. The upper or lower part of the installation platform can be placed with a to-be-tested transmitting end. The calibration coil array comprises a plurality of calibration coil frames installed on the installation platform and corresponding to the calibration coil frames of the transmitting end. The controller can control each calibration coil frame of the calibration coil array to be sequentially turned on. The testing device and testing method can calibrate and test each auxiliary function of the transmitting end of the wireless charging system. The testing method is simple, convenient and efficient, and can ensure the normal operation of the transmitting end of the wireless charging system.

Description

Technical Field

[0001] This invention relates to the field of new energy vehicle charging technology, and in particular to a wireless charging-assisted calibration test device and test method. Background Technology

[0002] With the increasing demand for energy conservation, emission reduction, and air pollution control, new energy vehicles (pure electric and hybrid vehicles) are becoming the new main force in the automotive industry and are developing rapidly. Currently, many developed countries and all well-known car companies and research institutions are committed to promoting and applying new energy vehicle technology. As an important part of the new energy vehicle development industry chain, the corresponding demand for charging piles is also growing explosively.

[0003] Wireless transmission refers to wireless charging. Currently, well-known domestic and international automakers, research institutes, and universities are investing heavily in its research and development. Wireless charging consists of three parts: the charging station, the transmitter, and the receiver. The charging station first rectifies the industrial frequency AC power into high-voltage DC power, then inverts it into high-frequency AC power, and finally transmits it to the transmitter via cable. The charging station is similar to a charging pile. The transmitter, or ground terminal, is actually composed of coils and magnetic cores. It generates a magnetic field through high-frequency AC power and transmits energy to the vehicle through magnetic coupling. The receiver, or vehicle terminal, integrates a receiving device and a converter. The receiving device is actually composed of coils and magnetic cores. The energy received from the transmitter is converted into high-voltage DC power by the converter to charge the high-voltage battery of new energy vehicles, similar to an on-board charger.

[0004] Wireless charging systems must have auxiliary functions, including foreign object detection (FOD) to prevent fires caused by foreign objects heating up due to the magnetic field during charging; alignment guidance to guide the car to accurately position itself relative to the transmitter during parking to prevent power reduction due to misalignment; and live object detection (LOP) to prevent living objects from being affected by the magnetic field radiation during charging. Therefore, a simple and convenient device and method are needed to calibrate the auxiliary functions to ensure they function properly. Summary of the Invention

[0005] In order to solve the technical problem that the prior art cannot perform auxiliary function calibration tests on wireless charging systems, the present invention proposes a wireless charging auxiliary calibration test device and test method.

[0006] The technical solution adopted in this invention is:

[0007] This invention proposes a wireless charging-assisted calibration test device, comprising:

[0008] The mounting platform may be used to place the transmitter to be tested on or below the mounting platform;

[0009] The calibration coil array includes multiple calibration coil frames mounted on a mounting platform, corresponding to the calibrated coil frames at the transmitting end;

[0010] The controller controls the individual conduction of each calibration coil frame.

[0011] The invention also includes a live organism testing component, which is mounted on a test track on the installation platform and can move along the test track.

[0012] The live organism detection component includes multiple detection columns spaced apart on a test track, which surrounds the calibration coil array.

[0013] Preferably, the shape of the calibration coil frame is circular, square, or triangular.

[0014] The invention also includes a plurality of connectors disposed above and below the mounting platform, the connectors being used to support or fix the transmitter.

[0015] The controller includes: multiple capacitor elements and a switching module, wherein the capacitor elements are connected to the calibration coil frames to form a resonant circuit, and the switching module is used to selectively turn on each calibration coil frame of the calibration coil array.

[0016] The present invention also proposes a test method for the foreign object detection function of wireless charging, which uses the wireless charging auxiliary calibration test device according to any one of claims 2 to 8 to test the various auxiliary functions of the transmitter.

[0017] Specifically, testing the auxiliary functions of the transmitter includes the following steps:

[0018] The controller issues a positioning calibration command and sends excitation signals of a specific frequency to the calibration coil array in a preset order, so that each calibration coil frame is turned on in sequence, and transmits the frame number data of the turned-on calibration coil frame to the controller of the transmitting end;

[0019] When the calibrated coil frame of the transmitter is turned on, a voltage change is generated. The controller of the transmitter collects the voltage change parameters and converts the voltage change parameters into detection values ​​according to preset rules. Each detection value corresponds to the frame number of the calibrated coil frame.

[0020] After the calibration coil frames are sequentially turned on, the controller at the transmitting end calculates the average value of all detected values ​​and calculates the calibration coefficient based on the ratio between the detected value of each wire frame and the average value.

[0021] Specifically, testing the auxiliary functions of the transmitter includes the following steps:

[0022] The controller issues a test command for the foreign object detection function, and sends excitation signals to the calibration coil array in a preset order, so that each calibration coil frame is turned on in sequence, and transmits the frame number data of the turned-on calibration coil frame to the controller of the transmitting end;

[0023] During the sequential conduction of each calibration coil frame, if the controller of the transmitting end reports that a foreign object exists in the coverage area of ​​the corresponding calibrated coil frame of the conducted calibration coil frame, it is determined that the foreign object detection function of the coverage area of ​​this calibrated coil frame is normal. If no foreign object is reported or the reported foreign object is not in the coverage area of ​​this calibrated coil frame, it is determined that the foreign object detection function is abnormal.

[0024] Specifically, testing the auxiliary functions of the transmitter includes the following steps:

[0025] A liveness detection function test command is issued, causing the liveness detection component to move along a preset test track. If the controller at the transmitting end reports the presence of a liveness, the liveness detection function is determined to be normal.

[0026] Compared with existing technologies, the testing device and testing method proposed in this invention can calibrate and test various auxiliary functions of the transmitter of a wireless charging system. The testing method is simple, convenient and efficient, ensuring that the transmitter of the wireless charging system works normally. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the three-dimensional structure in an embodiment of the present invention;

[0029] Figure 2 This is a top view in an embodiment of the present invention;

[0030] Figure 3 This is a schematic diagram of the square calibration coil array of the present invention;

[0031] Figure 4 This is a schematic diagram of the circular calibration coil array of the present invention;

[0032] Figure 5 This is a schematic diagram of the triangular calibration coil array of the present invention;

[0033] Figure 6 This is a schematic diagram of a calibration coil array according to another embodiment of the present invention;

[0034] Figure 7 This is a partial structural block diagram of the controller in this invention;

[0035] Figure 8 This is a simplified diagram of the analog switch in this invention.

[0036] 1. Installation platform; 2. Calibration coil array; 21. Calibration coil frame; 3. Test track; 4. Detection column; 5. Support column; 6. Transmitter. Detailed Implementation

[0037] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0038] The principles and structure of the present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0039] Wireless charging systems must include auxiliary functions, such as Foreign Object Detection (FOD) to prevent fires caused by foreign objects heating up under the magnetic field during charging; alignment guidance to ensure precise positioning of the car and transmitter during parking, preventing power reduction due to misalignment; and Loneliness Detection (LOP) to prevent the influence of surrounding magnetic field radiation on living beings during charging. Furthermore, to verify the proper functioning of these auxiliary functions, testing equipment is needed to calibrate and test them to ensure their normal operation.

[0040] like Figure 1 , 2As shown, this invention proposes a wireless assisted charging test device, comprising: a mounting platform 1, a calibration coil array 2, and a controller. A transmitter 6 of a wireless charging system to be tested and calibrated can be placed or installed above or below the mounting platform 1 (the transmitter is actually composed of a coil and a magnetic core, i.e., a calibrated coil frame, which can generate a magnetic field through high-frequency alternating current and transmit energy to the vehicle end through magnetic coupling). The calibration coil array 2 is set on the mounting platform 1, specifically comprising multiple calibration coil frames mounted on the mounting platform that can be individually controlled to switch on and off. The calibration coil frames correspond to the calibrated coil frames of the transmitter 6 for auxiliary function calibration testing. The controller is connected to the calibration coil array 2 and can control the calibration coil frames of the calibration coil array 2 to be turned on sequentially according to a preset order. Specifically, during charging alignment calibration, the controller sends excitation signals of a specific frequency to the calibration coil array in a preset sequence. These excitation signals are identical to the excitation signals from the actual positioning coils of the vehicle receiver. During foreign object detection testing, the controller sends excitation signals to the calibration coil array in a preset sequence. The excitation signals only need to ensure that the coil frame of the foreign object detection function can detect foreign objects; therefore, a specific frequency excitation signal is not required. Thus, this device can be used to test both the charging alignment and foreign object detection functions of the transmitter.

[0041] The installation platform 1 is also equipped with a test track 3, i.e. a ring track, surrounding the calibration coil array. The device also includes a live animal testing component, specifically multiple detection columns 4, which are spaced apart on the test track 3 and can move along the test track.

[0042] There are many ways to drive the detection column to move. For example, a ring gear corresponding to the test track can be installed on the mounting platform, and a motor can drive the ring gear to rotate. As long as the detection column is installed on the ring gear, the ring gear can drive the detection column to make a circular motion when driven by the motor, thereby realizing the movement of multiple detection columns along the test track. Other methods can also be used to drive the detection column to move along the test track, all of which are within the protection scope of this invention.

[0043] Multiple connectors are provided above and below the mounting platform 1. Specifically, these connectors can take the form of support columns 5, which are positioned around the calibration coil array to secure the transmitter of the wireless charging system. This ensures the transmitter is stably fixed above or below the mounting platform, simulating the actual positional relationship during car charging. The connectors can also be other fasteners, and the specific fixing method can be screw fixing, snap-fit ​​fixing, or other existing and convenient fixing methods, all of which are within the scope of this invention.

[0044] The length of the support column 5 can be adjusted according to the actual test results and test site conditions. The length of the support column is between 20mm and 300mm, and there are no specific requirements for its shape.

[0045] The entire installation platform 1 can be mounted on a trolley with bottom guide wheels, making it easy to move and adjust its position.

[0046] like Figures 3 to 5 As shown, the calibration coil array consists of m*n calibration coil frames, where m and n can be different or the same, depending on the requirements. Furthermore, the shapes of the coil frames in the calibration coil array include, but are not limited to, circles, squares, and triangles, and these shapes correspond to the shape of the coil frames of the calibrated coil on the transmitting end.

[0047] To adapt to actual conditions, its calibration coil array can also be modified, such as... Figure 6 As shown, taking a square coil as an example, the area of ​​each coil frame is increased so that it simultaneously covers the four calibrated coil frames of transmitter 6 (see reference for details). Figure 3 and Figure 6 Furthermore, the actual number of coil frames covered can be adjusted, typically between 1 and 8. Since the calibration coil array contains dozens of coil frames, during the calibration test, the calibration coil frames must be selectively activated. Usually, a specific sequence and activation time are preset. Furthermore, the number of frames activated simultaneously can be modified to speed up the test.

[0048] The controller specifically includes: multiple capacitor elements and a switching module. The capacitor elements are connected to each independent coil of the calibration coil array to form a resonant circuit. By controlling the switch of the switching module, each calibration coil frame on the calibration coil array can be selected to be turned on, thereby realizing the turning on of each calibration coil frame on the calibration coil array in a preset order.

[0049] like Figure 7 , 8 As shown, the switching module specifically includes: an FPGA chip (or an MCU chip), a digital-to-analog converter (DAC), an analog multiplexer, address lines, an analog-to-digital converter (ADC), and a filter.

[0050] The FPGA chip is powered by a power supply and mainly processes and judges the data returned by the ADC module, as well as sends the excitation signal (a specific frequency of each coil frame). It controls the conduction of the analog multiplexer through the address lines. Depending on the specific application scenario, it can be replaced by an MCU chip.

[0051] The digital-to-analog converter (DAC) module converts the excitation signal from the FPGA chip into an analog signal, which is then fed to the coil array via an analog multiplexer and connected to each of the individual switches.

[0052] like Figure 8 As shown, the analog multiplexer is an integrated device consisting of multiple switches. Each switch is connected to its corresponding coil frame. Only one switch is turned on at a time, controlled by the address line and the enable signal. As shown in the figure, there are 16 switches, corresponding to 16 coil frames S1A-S16A, and the address changes from 0000 to 1111.

[0053] The coil array is made up of multiple coil frames wound together and connected to a resonant capacitor (i.e., the capacitor element mentioned above). Due to the principle that the inductance of the coil is changed by the presence of a metallic foreign object, the resonant frequency changes, which in turn causes the voltage and current on the coil to change. Each individual coil frame is connected to each channel of the analog multiplexer.

[0054] After the excitation signal passes through each coil frame, it converges and becomes a continuous signal (while the signal on the coil frame is discontinuous). The signal of a certain frequency is filtered by a filter to reduce interference on the transmission path.

[0055] The analog-to-digital converter (ADC) module converts analog signals into digital signals and is connected to the FPGA chip.

[0056] It should be noted that the calibration coil array and the calibrated coil array can use the same controller to control their conduction. That is, the controller on the transmitting end can also be composed of the above-mentioned modules, with the address line order remaining unchanged, from 0000 to 1111. The difference lies in the conduction status of the coil array, as detailed below:

[0057] 1. The conduction time of the calibration coil array is longer than that of the calibrated coil array (a single frame is usually several seconds, while a single frame of the calibrated coil array is usually tens of milliseconds).

[0058] 2. During the conduction of the calibration coil array, the enable signal switches between high and low levels at a certain frequency (usually several kHz, to keep the same as the actual positioning coil switching speed, so as to better simulate the positioning coil at the receiving end).

[0059] 3. With no excitation signal on the calibration coil array, each coil frame of the array is turned on for tens of milliseconds, cycling continuously. Within these tens of milliseconds, the coil frame remains on the calibration coil array. Each coil frame is turned on for several seconds, cycling continuously. Within these seconds, an enable signal controls the coil frame to continuously turn on and off (i.e., in a switching state). The reason the calibration coil array is in a switching state is (consistent with the actual positioning coil state at the receiving end). Since the detection is of a change, if there is only one change, due to time decay, it will quickly be considered as no change. However, positioning requires long-term detection; continuous on / off switching is equivalent to foreign objects constantly entering and leaving, meaning the change is always present.

[0060] The present invention also proposes a test method for the foreign object detection function of wireless charging, which uses the above-mentioned wireless charging auxiliary calibration test device to test and calibrate various auxiliary functions of the transmitter.

[0061] The specific steps involved in calibrating the alignment guidance function of the transmitter are as follows:

[0062] The controller issues a positioning calibration command and sends excitation signals of a specific frequency to the calibration coil array in a preset order, causing the calibration coil frames of the calibration coil array to be turned on in sequence, and transmitting the frame number data of the turned-on calibration coil frames to the controller at the transmitting end.

[0063] When the calibration coil frame is turned on, the voltage of the calibrated coil frame corresponding to the calibration coil frame on the transmitter end changes. The controller on the transmitter end collects the specific parameters of the voltage change and converts the specific parameters of the voltage change into detection values ​​according to preset rules. Each detection value corresponds to the frame number of the calibrated coil frame that is turned on.

[0064] After all calibration coil frames have been turned on in turn, the controller at the transmitting end calculates the average value of all detected values ​​and calculates the calibration coefficient based on the ratio of the detected value of each turned-on calibration coil frame to the average value.

[0065]

[0066]

[0067] The detected values ​​are M1, M2, M3, M4, M5...Mn, and the average value is (M ave The calibration coefficient is K. n Ideally, by substituting calibration coefficients into each calibrated coil frame at the transmitter, the measured value of each calibrated coil frame after calibration will be very close to the average value. Calibration is necessary because the inductance and capacitance components of the calibrated coil frames at the transmitter have a certain deviation at the factory. Without calibration using correction coefficients, the changing parameters of each coil frame at the transmitter will be inconsistent, resulting in significant deviations during alignment guidance at the vehicle's receiver. Calibration using correction coefficients ensures that the voltage change of each calibrated coil frame at the transmitter is close to the average value when it is turned on.

[0068] The detected value can be the amplitude parameter of the voltage change, or other specific parameter values ​​that can represent or reflect the voltage change.

[0069] In a wireless charging alignment guidance system, the different positions of the positioning coil on the car receiver result in different coil frames causing changes in electrical parameters (voltage, current, phase). Ideally, when the receiver coil is directly above the physical center of different coil frames on the transmitter, the changes in electrical parameters should be the same. However, due to device deviations, external environmental factors, etc., the changes in electrical parameters differ when the receiver coil is directly above the physical center of different coil frames on the transmitter, leading to inaccurate coordinate calculations. Therefore, coefficient correction is required.

[0070] Here is a brief description of the specific alignment and guidance process between the transmitter and receiver: During wireless charging, the receiver on the car needs to be kept within a certain range above the transmitter on the ground to ensure high-efficiency charging. The receiver is placed above the transmitter, with the array coil frame of the transmitter facing the alignment coil frame of the receiver. The array coil frame of the transmitter sends a specific frequency excitation signal to its own array coil frame. By detecting changes in electrical parameters such as voltage, it detects metal foreign objects and locates coordinates. When positioning is activated, the alignment coil frame on the receiver conducts at a specific frequency (this specific frequency is used to distinguish it from metal foreign objects). Since the coil frames of the receiver and transmitter have the same resonant frequency (resonance is needed to increase the voltage change due to the distance), a voltage change will appear on the array coil frame of the transmitter due to the coupling principle. The transmitter obtains the voltage change of each coil frame, and each coil frame corresponds to a coordinate. The voltage change is weighted and calculated (i.e., the larger the voltage change, the larger the coordinate). Then, the car adjusts its position based on the feedback until the car receiver is within the appropriate charging range.

[0071] Furthermore, when using the calibration coil frame in this device to correct the positioning coefficient of the calibrated coil frame, it is necessary to ensure that the change in electrical parameters of the calibrated coil frame by the calibrated coil frame is as similar as possible to that of the positioning coil at the vehicle receiver. Therefore, the resonant capacitor parameters on the calibration coil can be adjusted according to actual conditions, and the frequency of the calibration coil can be obtained by frequency sweeping using a controller. That is, by sending PWM waves with the same amplitude but different frequencies, the maximum output voltage is detected as the resonant frequency.

[0072] The foreign object detection function test includes the following steps:

[0073] The controller issues a test command for the foreign object detection function, and sends excitation signals to the calibration coil array in a preset order, so that the independent calibration coil frames are turned on in sequence, and transmits the frame number data of the turned-on calibration coil frames to the controller at the transmitting end.

[0074] During the sequential conduction process of each calibration coil frame, if the controller at the transmitting end reports that a foreign object exists in the coverage area of ​​this conduction frame, it is determined that the foreign object detection function of the corresponding calibration coil frame is normal. If no foreign object is reported or the reported foreign object is not in this calibration coil frame, it is determined that the foreign object detection function is abnormal.

[0075] The liveness detection function test includes the following steps:

[0076] A liveness detection function test command is issued, causing the liveness detection component to move along a preset test track. If the controller at the transmitting end reports the presence of a liveness, the liveness detection function is determined to be normal.

[0077] The wireless charging transmitter and receiver are part of a wireless charging system. The transmitter specifically includes an inverter module, a transmitting coil, and auxiliary function modules. The inverter module includes a PFC circuit and an inverter circuit. The PFC circuit converts AC power from the grid to DC power, and the inverter circuit converts DC power back to AC power. The transmitting coil emits energy in the form of an alternating magnetic field. The wireless charging receiver includes a receiving coil and a rectifier circuit. The receiving coil induces AC power in the alternating magnetic field, and the rectifier circuit converts the AC power into DC power for output. The testing device proposed in this invention simulates the wireless charging receiver and is used to test and calibrate various auxiliary functions of the transmitter.

[0078] It should be noted that the terminology used above is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0079] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0080] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0081] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0082] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0083] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A wireless charging-assisted calibration and testing device, characterized in that, include: The mounting platform may be used to place the transmitter to be tested on or below the mounting platform; The calibration coil array includes multiple calibration coil frames mounted on a mounting platform, corresponding to the calibrated coil frames at the transmitting end; The controller controls the individual conduction of each calibration coil frame; When performing charging alignment calibration, a positioning calibration command is issued. The controller sends excitation signals of a specific frequency to the calibration coil array in a preset order, so that each calibration coil frame is turned on in sequence, and transmits the frame number data of the turned-on calibration coil frame to the controller of the transmitter. When the calibrated coil frame of the transmitter is turned on, a voltage change is generated. The controller of the transmitter collects the voltage change parameters and converts the voltage change parameters into detection values ​​according to preset rules. Each detection value corresponds to the frame number of the calibrated coil frame. After the calibration coil frames are sequentially turned on, the controller at the transmitting end calculates the average value of all detected values, and calculates the calibration coefficient based on the ratio between the detection value of each calibrated coil frame and the average value; When the calibration coil frame corrects the positioning coefficient of the calibrated coil frame, the change in the electrical parameters of the calibrated coil frame is the same as that of the positioning coil of the car receiver. The frequency of the calibration coil is obtained by frequency sweeping by the controller. PWM waves with the same amplitude but different frequencies are sent. The maximum value of the output voltage is the resonant frequency. Among them, the foreign object detection function test command is issued, and the controller sends excitation signals to the calibration coil array in a preset order, so that each calibration coil frame is turned on in sequence, and transmits the frame number data of the turned-on calibration coil frame to the controller of the transmitting end; During the sequential conduction of each calibration coil frame, if the controller of the transmitting end reports that a foreign object exists in the coverage area of ​​the corresponding calibration coil frame of the conducted calibration coil frame, it is determined that the foreign object detection function of the coverage area of ​​this calibration coil frame is normal. If no foreign object is reported or the reported foreign object is not in the coverage area of ​​this calibration coil frame, it is determined that the foreign object detection function is abnormal. The wireless charging assisted calibration test device also includes a live animal test component, which is installed on the test track of the installation platform and can move along the test track.

2. The wireless charging assisted calibration and testing device as described in claim 1, characterized in that, The live organism testing component includes multiple detection columns spaced apart on a test track, which surrounds the calibration coil array.

3. The wireless charging assisted calibration and testing device as described in claim 1, characterized in that, The shape of the calibration coil frame can be circular, square, or triangular.

4. The wireless charging assisted calibration and testing device as described in claim 1, characterized in that, Also includes: Multiple connectors are disposed above and below the mounting platform, the connectors being used to support or fix the transmitter.

5. The wireless charging-assisted calibration and testing device as described in claim 1, characterized in that, The controller includes: multiple capacitor elements and a switching module. The capacitor elements are connected to the calibration coil frames to form a resonant circuit. The switching module is used to selectively turn on each calibration coil frame of the calibration coil array.

6. A method for testing the foreign object detection function of wireless charging, characterized in that, Using the wireless charging auxiliary calibration test apparatus according to any one of claims 2 to 5, test each of the auxiliary functions of the transmitter.

7. The wireless charging foreign object detection function test method as described in claim 6, characterized in that, Testing the auxiliary functions of the transmitter includes the following steps: A liveness detection function test command is issued, causing the liveness detection component to move along a preset test track. If the controller at the transmitting end reports the presence of a liveness, the liveness detection function is determined to be normal.

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