Magnetic field construction device, magnetic interference test system and method

Abstract

The present application provides a magnetic field construction device, a magnetic interference test system and a method, which can realize the simulation of the external magnetic interference environment of the voice coil motor. The magnetic field construction device includes: a first bearing structure and at least one second bearing structure. The first bearing structure can bear the voice coil motor of the electronic device; each second bearing structure is arranged on the periphery of the first bearing structure, wherein each second bearing structure includes at least one bearing position, and each bearing position is used to detachably fix a magnetic component.

Description

Technical Field

[0001] The present application relates to the technical field of electronic equipment, and in particular to a magnetic field construction device, a magnetic interference testing system and a method. Background Art

[0002] In the development of electronic devices such as mobile phones, voice coil motors (VCM) have become an important component of electronic devices. For example, the camera of a mobile phone can use a VCM motor to achieve autofocus, so that the position of the lens can be adjusted through the VCM to present a clear image.

[0003] Since the external magnetic field environment of the voice coil motor in electronic equipment is often complex, there is a lack of a solution that can simulate the external magnetic field environment of the voice coil motor. Summary of the invention

[0004] In order to solve the above technical problems, the present application provides a magnetic field construction device, a magnetic interference testing system and a method, which can flexibly simulate the external magnetic field environment of the VCM motor.

[0005] In a first aspect, the present application provides a magnetic field construction device, which includes: a first bearing structure for carrying a voice coil motor of an electronic device; and at least one second bearing structure disposed on the periphery of the first bearing structure, wherein each second bearing structure includes at least one bearing position, and each bearing position is used to detachably fix a magnetic component.

[0006] In this way, since the second bearing structure is arranged at the periphery of the first bearing structure, and each bearing position of the second bearing structure can detachably fix the magnetic component, the magnetic component around the voice coil motor can be flexibly adjusted. Since the adjustment of the magnetic component can adjust the magnetic flux generated by the second bearing structure (or the intensity of the generated magnetic field), the magnetic field construction device can flexibly adjust and simulate the external magnetic field environment of the VCM motor.

[0007] Exemplarily, the first bearing structure may be a motor fixture. For example, the motor fixture may have a first groove, and the first groove is used to place the VCM motor.

[0008] Exemplarily, the second bearing structure may be a magnetic fixture, and the number of the magnetic fixture may be one or more.

[0009] Exemplarily, the bearing position may be implemented as a second groove. It should be noted that the bearing position may also be implemented as other structures capable of fixing the magnetic component, and there is no specific limitation on this.

[0010] Exemplarily, the magnetic component may be implemented as a magnet or other magnetic structure, which is not particularly limited.

[0011] For example, the second bearing structure can be arranged around the first bearing structure. For example, it can be arranged on the circumferential plane of the VCM motor (i.e., the plane where the x-axis and y-axis are located). For another example, it can also be arranged in the z-axis direction of the VCM motor.

[0012] By way of example, the detachable fixing means that the magnet component can be placed in the carrying position and can also be removed from the carrying position.

[0013] Exemplarily, when the second bearing structure has a plurality of bearing positions, the magnetic flux or magnetic field strength of the magnetic components fixed to the plurality of bearing positions may be different.

[0014] Exemplarily, the external magnetic flux or external magnetic field strength of the VCM motor can also be changed by adjusting the distance between the second supporting structure and the VCM motor, adjusting the number of magnetic structures placed in each second supporting structure, the magnetic flux (or magnetic field strength) of the placed magnetic structures, adjusting the placement position of the magnetic structures in the second supporting structures, etc.

[0015] According to the first aspect, at least one second bearing structure is arranged along the circumferential direction of the voice coil motor.

[0016] In this way, since other components are often located in the circumferential direction of the voice coil motor in electronic devices such as mobile phones, this setting method can further improve the simulation accuracy, reduce the simulation complexity, and reduce the volume of the magnetic field construction device.

[0017] According to the first aspect, or any implementation of the first aspect above, the number of at least one second bearing structure is multiple; wherein a first number of second bearing structures are arranged in a first direction, and a second number of second bearing structures are arranged in a second direction; wherein the sum of the first number and the second number is equal to the total number of at least one second bearing structure, and the first direction and the second direction are located on the plane where the circumferential direction is located.

[0018] In this way, by setting the second supporting structure in the first direction and the second direction, and by adjusting the magnetic field strength of the magnet structure in the two directions, the magnetic field strength on the entire circumferential plane can be adjusted, which further simplifies the structure and cost of the magnetic field construction device while ensuring the simulation accuracy, and reduces the test complexity.

[0019] Exemplarily, the first direction and the second direction may not be parallel, and in one example, the first direction and the second direction may be perpendicular. For example, the first direction may be the x-axis direction, or referred to as the x-direction. The second direction may be the y-axis direction, or referred to as the y-axis direction.

[0020] For example, seeFig.15 , two second bearing structures can be arranged in the x direction. In the x direction, one of them is located on one side of the VCM motor, and the other second bearing structure is located on the other side of the VCM motor. And, the other two second bearing structures can be arranged in the y direction, in the y direction, one of them is located on one side of the VCM motor, and the other second bearing structure is located on the other side of the VCM motor.

[0021] According to the first aspect, or any implementation of the first aspect above, a single second bearing structure includes a first bearing position and a second bearing position, wherein the first bearing position has a first distance from the voice coil motor, the second bearing position has a second distance from the voice coil motor, and the first distance and the second distance are different.

[0022] In this way, since the distances between the first bearing position and the second bearing position are different from the VCM motor, the magnetic structure placed in the first bearing position and the magnetic structure placed in the second bearing position can generate different magnetic fluxes, thereby achieving fine adjustment of the external magnetic flux of the VCM motor. In addition, the magnetic flux of the external magnetic field of the VCM motor can be changed by inserting the same magnetic structure into the first bearing position or the second bearing position.

[0023] Exemplarily, when the number of bearing positions of each second bearing structure is more than 2, the second bearing structure may further include a third bearing position, and so on.

[0024] According to the first aspect, or any implementation of the first aspect above, a single second bearing structure includes a first bearing position and a second bearing position, the first bearing position is used to detachably fix the first magnet component, and the second bearing position is used to detachably fix the second magnet component, and the magnetic flux of the first magnet component and the second magnet component are different.

[0025] In this way, by inserting magnet structures with different magnetic fluxes, the external magnetic field of the VCM motor can be finely adjusted.

[0026] According to the first aspect, or any implementation of the first aspect, the magnetic field construction device is made of non-magnetic material.

[0027] In this way, the influence of the magnetism of the magnetic field construction device itself on the simulation results can be avoided, further improving the simulation accuracy.

[0028] Exemplarily, the non-magnetic material may be a non-magnetic alloy material or a non-magnetic metal material such as non-magnetic Cu, or may also be a material such as plastic.

[0029] According to the first aspect, or any implementation of the first aspect above, the voice coil motor is a voice coil motor in a camera module of an electronic device.

[0030] Exemplarily, the electronic device may be a mobile phone.

[0031] Exemplarily, the voice coil motor can be a VCM motor in a front camera module, a VCM motor in a wide-angle camera module, a VCM motor in a telephoto camera module, etc.

[0032] In a second aspect, an embodiment of the present application provides a magnetic interference testing system, which includes: a magnetic field construction device in the above-mentioned first aspect and any one of the implementation methods of the first aspect; a voice coil motor fixed to a first supporting structure of the magnetic field construction device; a controller connected to the voice coil motor and used to drive the voice coil motor to work; and a detection device for detecting position parameters of the voice coil motor during the operation of the voice coil motor.

[0033] In this way, by removably fixing the magnet in the magnetic field construction device, a magnetic field environment with adjustable magnetic flux can be constructed around the VCM motor using the magnetic field construction, thereby simulating the real environment of magnetic interference to which the VCM motor is subjected in the electronic device (complete machine). Based on the magnetic field construction device and the detection device, the position parameters of the VCM motor under different magnetic interference environments can be detected. Since the moving position of the VCM motor is related to the magnetic interference it is subjected to, the magnetic interference system provided in the embodiment of the present application can accurately quantify the degree of interference of the VCM motor with the magnetic field under different magnetic interference environments, thereby achieving accurate magnetic interference detection of the VCM motor.

[0034] Exemplarily, the controller may control the VCM motor to work through a driver. For example, the driver may include a driver board. In one example, the controller may generate a drive control signal and send the drive control signal to the driver, the driver generates a current corresponding to the drive control signal, and outputs the generated current to the coil of the VCM motor.

[0035] The drive control signal is a signal used to control the VCM motor to work according to the target stroke. Optionally, the drive control signal can also control the movement direction of the VCM motor, such as the AF direction, the OIS direction, etc.

[0036] Exemplarily, in order to facilitate detection by the detection device, the coil of the VCM motor is connected to the test lens, and a reflective sheet is provided on the test lens. Optionally, the test lens can also be implemented as a reflector. Optionally, a marker can also be installed on the test lens.

[0037] According to a second aspect, the position parameter includes one or more of a position of the voice coil motor in the first direction, a position in the second direction, a position in the third direction, and a tilt angle of the voice coil motor.

[0038] According to the second aspect, or any one of the implementations of the second aspect, the detection device is used to detect a first position parameter of the voice coil motor during the operation of the voice coil motor when the magnetic field construction device is in a first state; and is also used to detect a second position parameter of the voice coil motor during the operation of the voice coil motor when the magnetic field construction device is in a second state; wherein the magnetic flux of the magnetic field construction device in the first state is different from that of the magnetic field construction device in the second state.

[0039] In this way, the interference characteristics of the VCM motor under different magnetic field environments can be tested by adjusting the magnetic flux of the external magnetic field constructed by the magnetic field construction device, thereby improving the test accuracy.

[0040] Exemplarily, in the first state, no magnetic structure is placed in each second bearing structure of the magnetic field construction device. In the second state, a magnetic structure is placed in at least one bearing position of at least one second bearing structure.

[0041] Optionally, when it is necessary to test the interference characteristics of the VCM motor under different magnetic field environments, there may also be a third state, a fourth state, etc. In the third state and the fourth state, the magnetic field construction device is placed with at least one magnetic structure, and the magnetic flux of the external magnetic field constructed by the magnetic field construction device in the second state, the third state, and the fourth state is different.

[0042] In a third aspect, an embodiment of the present application provides a magnetic interference testing method, which is applied to the magnetic interference testing system in the first aspect and any one of the implementations of the first aspect, the method comprising: a controller drives the voice coil motor to operate; and a detection device detects the position parameters of the voice coil motor during the operation of the voice coil motor.

[0043] In this way, by removably fixing the magnet in the magnetic field construction device, a magnetic field environment with adjustable magnetic flux can be constructed around the VCM motor using the magnetic field construction, thereby simulating the real environment of magnetic interference to which the VCM motor is subjected in the electronic device (complete machine). Based on the magnetic field construction device and the detection device, the position parameters of the VCM motor under different magnetic interference environments can be detected. Since the moving position of the VCM motor is related to the magnetic interference it is subjected to, the magnetic interference system provided in the embodiment of the present application can accurately quantify the degree of interference of the VCM motor with the magnetic field under different magnetic interference environments, thereby achieving accurate magnetic interference detection of the VCM motor.

[0044] According to the third aspect, the detection device detects the position parameters of the voice coil motor during the operation of the voice coil motor, including:

[0045] When the magnetic field construction device is in a first state, the detection device detects a first position parameter of the voice coil motor;

[0046] When the magnetic field construction device is in the second state, the detection device detects a second position parameter of the voice coil motor;

[0047] The magnetic flux of the magnetic field construction device in the first state is different from that of the magnetic field construction device in the second state.

[0048] In this way, the interference characteristics of the VCM motor under different magnetic field environments can be tested by adjusting the magnetic flux of the external magnetic field constructed by the magnetic field construction device, thereby improving the test accuracy.

[0049] For example, for each state, the controller may generate multiple control command signals in sequence, each of which is used to drive the VCM motor to work in different strokes. Alternatively, if the VCM motor works in a specific stroke, the control command signal corresponding to the specific stroke may be used to drive the VCM motor to work.

[0050] According to the third aspect, or any implementation of the third aspect, the position parameter includes first position data and second position data;

[0051] The detection device detects the position parameters of the voice coil motor during the operation of the voice coil motor, including:

[0052] When the voice coil motor works along a first direction, the detection device detects first position data of the voice coil motor;

[0053] When the voice coil motor works along the second direction, the detection device detects second position data of the voice coil motor;

[0054] The first direction and the second direction are located on the plane where the circumferential direction is located.

[0055] In this way, the influence of magnetic interference on the OIS characteristics of the VCM motor can be accurately measured, thereby improving the test accuracy.

[0056] For example, for any direction in the first direction and the second direction, the controller may sequentially generate a plurality of control command signals, each of which is used to drive the VCM motor to work in a different stroke. Alternatively, if the VCM motor works in a specific stroke, the control command signal corresponding to the specific stroke may be used to drive the VCM motor to work.

[0057] According to the third aspect, or any implementation of the third aspect, the position parameter includes third position data; and the detection device detects the position parameter of the voice coil motor during the operation of the voice coil motor, including:

[0058] When the voice coil motor works along a third direction, the detection device detects third position data of the voice coil motor; wherein the third direction is perpendicular to the plane where the circumferential direction is located.

[0059] In this way, the degree of influence of magnetic interference on the AF characteristics of the VCM motor can be accurately measured, thereby improving the test accuracy.

[0060] For example, for the third direction, the controller may sequentially generate a plurality of control command signals, each of which is used to drive the VCM motor to work in different strokes. Alternatively, if the VCM motor works in a certain stroke, the control command signal corresponding to the certain stroke may be used to drive the VCM motor to work. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] Figure 1 A schematic diagram showing an exemplary photographing scene provided by an embodiment of the present application is shown;

[0062] Figure 2 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application;

[0063] Figure 3 A circuit diagram of an exemplary electronic device provided in an embodiment of the present application is shown;

[0064] Figure 4 An exploded view of an exemplary VCM motor structure provided by an embodiment of the present application is shown;

[0065] Figure 5 A schematic structural diagram of an exemplary camera module provided in an embodiment of the present application is shown;

[0066] Figure 6 A schematic structural diagram of an exemplary electronic device is shown;

[0067] Figure 7 A schematic diagram of a magnetic interference testing system provided in an embodiment of the present application is shown;

[0068] Figure 8 A schematic diagram of an exemplary magnetic interference testing system provided in an embodiment of the present application is shown;

[0069] Fig. 9 A schematic diagram showing an exemplary correspondence relationship between a driving command signal and a stroke provided in an embodiment of the present application is shown;

[0070] Fig.10 A schematic diagram of an exemplary driving module is shown;

[0071] Fig.11 A schematic diagram of the structure of an exemplary VCM motor in the xz direction provided in an embodiment of the present application is shown;

[0072] Fig.12 A schematic diagram of the structure of an exemplary VCM motor in the xy direction provided in an embodiment of the present application is shown;

[0073] Figure 13A-13B A schematic diagram of the structure of an exemplary magnetic field environment construction device provided in an embodiment of the present application at different angles is shown;

[0074] Fig.14 A schematic diagram of the structure of a magnetic field environment construction device in the xz direction provided in an embodiment of the present application is shown;

[0075] Fig.15 A schematic diagram of the structure of a magnetic field environment construction device in the xy direction provided in an embodiment of the present application is shown;

[0076] Fig.16 A schematic structural diagram of an exemplary magnetic fixture provided in an embodiment of the present application is shown;

[0077] Fig.17 A schematic diagram showing a magnet placement method provided in an embodiment of the present application is shown;

[0078] Fig.18 A schematic structural diagram of an exemplary detection device provided in an embodiment of the present application is shown;

[0079] Fig.19 A schematic structural diagram of an exemplary laser test module provided in an embodiment of the present application is shown;

[0080] Fig. 20 A schematic diagram of a flow chart of a magnetic interference testing method provided in an embodiment of the present application is shown;

[0081] Fig.21 An exemplary data aggregation schematic diagram provided in an embodiment of the present application is shown;

[0082] Fig. 22 A schematic diagram of a curve showing the stroke and CODE value of an exemplary VCM motor in the AF direction provided by an embodiment of the present application;

[0083] Fig.23 A curve diagram showing the stroke and CODE value of an exemplary VCM motor in the OIS direction provided in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0084] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0085] The term "and / or" in this article is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone.

[0086] The terms "first" and "second" in the description and claims of the embodiments of the present application are used to distinguish different objects rather than to describe a specific order of objects. For example, a first target object and a second target object are used to distinguish different target objects rather than to describe a specific order of target objects.

[0087] In the embodiments of the present application, directional terms such as "up", "down", "left" and "right" may include but are not limited to being defined relative to the orientation of the components schematically placed in the drawings. It should be understood that these directional terms may be relative concepts. They are used for relative description and clarification, and may change accordingly according to changes in the orientation of the components in the drawings.

[0088] In the embodiments of the present application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or connected through an intermediate medium. In addition, the term "coupling" can be a way of achieving electrical connection for signal transmission.

[0089] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0090] In the description of the embodiments of the present application, unless otherwise specified, the meaning of "multiple" refers to two or more than two. For example, multiple processing units refer to two or more processing units; multiple systems refer to two or more systems.

[0091] In order to meet the needs of users, in the daily use of electronic devices such as mobile phones, users can use the camera of the electronic device to take pictures. For example, Figure 1FIG. 1 is a schematic diagram showing an exemplary photographing scene provided by an embodiment of the present application. Figure 1 As shown, in a photo-taking scenario, a user can use the camera of the mobile phone 100 to take photos.

[0092] For ease of understanding, the electronic device is described below with reference to the accompanying drawings. Figure 2 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. It should be understood that: Figure 2 The structure of the electronic device shown can be applied to the mobile phone 100 shown in the above embodiment. It should be understood that Figure 2 The electronic device shown is merely one example of an electronic device, and the electronic device may have more or fewer components than shown in the drawings, may combine two or more components, or may have a different configuration of components. Figure 2 The various components shown in the EMBODIMENTS 2000 may be implemented in hardware, software, or a combination of hardware and software, including one or more signal processing and / or application specific integrated circuits.

[0093] in, Figure 2 (1) is a schematic diagram of the front structure of the electronic device. Figure 2 (2) in FIG. 1 is a schematic diagram of the back structure of an electronic device. Figure 2 As shown, the electronic device includes a display module 110, a back cover (also called a battery cover) 120 and a middle frame 130. Among them, the electronic devices provided in the embodiment of the present application may include but are not limited to mobile phones, tablet computers, laptops, ultra-mobile personal computers (Ultra-Mobile Personal Computer, UMPC), personal digital assistants (Personal Digital Assistant, PDA), point of sales (Point Of Sales, POS) machines, intercoms, car computers, televisions, smart wearable devices (such as smart watches or smart bracelets, etc.), smart home devices (such as Bluetooth speakers, etc.), driving recorders, security equipment and other electronic devices with cameras. The embodiment of the present application does not specifically limit the specific types of the above electronic devices. For the convenience of explanation below, the embodiment of the present application takes the electronic device as an example of a mobile phone for explanation.

[0094] The display module 110 includes a cover plate and a display screen which are stacked. The cover plate, for example, protects the display screen. The display screen includes, for example, a liquid crystal display (LCD), an organic light emitting diode (OLED) display screen, and an LED display screen, among which the LED display screen includes, for example, a Micro-LED display screen, a Mini-LED display screen, and the like. The embodiment of the present application does not limit the type of the display screen.

[0095] The material of the back cover 120 may include, for example, opaque materials such as plastic, plain leather, and glass fiber; or may include translucent materials such as glass. The material of the back cover 120 is not limited in the embodiment of the present application.

[0096] The middle frame 130 includes an annular appearance part 131 and a support part (not shown in the figure) located inside the annular appearance part 131 and between the display module 110 and the back cover 120. A charging interface 170 is also provided on the middle frame. Among them, the charging interface 170 can be an interface that complies with the USB standard specification, specifically a Mini USB interface, a Micro USB interface, a USB Type C interface, etc. The display module 110, the back cover (also called the battery cover) 120 and the annular appearance part 131 surround a housing cavity, and the housing cavity is provided with structures such as a battery, a printed circuit board (PCB) 140 and a functional device 150 ( Figure 2 (not shown), the functional device 150 includes a first functional component and a second functional component. The first functional component can be arranged on the PCB 40 and electrically connected to the PCB 140; the second functional component is not arranged on the PCB, but is electrically connected to the PCB 140. The first functional component may include devices such as a processor, a power processing circuit (such as a power management chip and / or a charging management module, etc.), a display driving circuit and a measurement circuit, and the second functional component may include devices such as a speaker, a rear camera 151 and a front camera 152. Each device is electrically connected through the PCB 140 to achieve signal transmission and interaction. The support member can support part of the structure in the accommodating cavity. In the embodiment of the present application, the rear camera 151 may include one or more cameras, for example, the rear camera may include a main camera 1511, a wide-angle camera 1512 and a telephoto camera 1513. It should be noted that in the embodiment of the present application, there is no specific restriction on the number, type, and arrangement of the cameras included in the rear camera 151. For example, the rear camera 151 may also include an ultra-wide-angle camera, a depth camera (such as a Time Of Flight (TOF) device), etc., without specific limitation.

[0097] The processor may include one or more processing units, for example, the processor may include a baseband processor, an application processor (AP), a modem processor, a graphics processing unit (GPU), an image signal processor (ISP), a controller, a memory, a video codec, a digital signal processor (DSP), and / or a neural-network processing unit (NPU), etc. Different processing units may be independent devices or integrated into one or more processors.

[0098] A memory may be provided in the processor for storing instructions and data. In some embodiments, the memory in the processor is a cache memory. The memory may store instructions or data that the processor has just used or is cyclically used. If the processor needs to use the instruction or data again, it may be directly called from the memory. This avoids repeated access, reduces the waiting time of the processor, and thus improves the efficiency of the system.

[0099] In some embodiments, the processor may include one or more interfaces. The interface may include an Inter-Integrated Circuit (I2C) interface, a Serial Peripheral Interface (SPI), 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, etc.

[0100] The I2C interface is a bidirectional synchronous serial bus, including a serial data line (SDA) and a serial clock line (SCL). In some embodiments, the processor may include multiple sets of I2C buses. The processor may be coupled to the speaker, the rear camera 151, the front camera 152, etc. through different I2C bus interfaces.

[0101] The charging management module is used to receive charging input from the charger. The charger can be a wireless charger or a wired charger. In some wired charging embodiments, the charging management module can receive charging input from the wired charger through the charging interface 170. In some wireless charging embodiments, the charging management module can receive wireless charging input through the wireless charging coil of the electronic device. While the charging management module is charging the battery, it can also power the power load of the electronic device through the power management module.

[0102] The power management module is used to connect the battery, the charging management module and the processor. The power management module receives input from the battery and supplies power to the PCB board 140, the processor, the internal memory, the external memory, the display screen, the speaker, the rear camera 151 and the front camera 152, and the wireless communication module and other power loads.

[0103] It is to be understood that the above content only schematically illustrates some components included in the electronic device (terminal device), and the actual electronic device may have more or fewer components than the above content, or combine some components, or split some components, or arrange the components differently. The components shown in the figure may be implemented in hardware, software, or a combination of software and hardware.

[0104] It should be noted that Figure 2 The electronic device is in a rectangular flat plate shape. In other optional embodiments, the shape of the electronic device can also be a square flat plate shape, a circular flat plate shape, an elliptical flat plate shape, etc. Of course, the electronic device can also be a foldable electronic device, etc.

[0105] After introducing the specific structure of the electronic device through the above figures, the following continues to describe the photo scene. In the above photo scene, in order to present a clear shot image to the user, the camera of the electronic device such as a mobile phone can use a motor to focus and anti-shake.

[0106] For example, Figure 3 FIG. 1 is a circuit diagram of an exemplary electronic device provided in an embodiment of the present application. It should be noted that: Figure 3 The circuit of the electronic device shown in FIG. 1 can be applied to the electronic device shown in the above embodiment. Figure 3As shown, the electronic device 200 may include components such as a circuit board 210, a front camera module 220, a wide-angle camera module 230, a telephoto camera module 240, a telephoto camera module 250, and a speaker 260. It is understandable that the actual electronic device may have more or fewer components than the above content, and there is no specific limitation on this. Among them, components such as the front camera module 220, the wide-angle camera module 230, the telephoto camera module 240, the telephoto camera module 250, and the speaker 260 may not be arranged on the circuit board 210, and the above components may be electrically connected to the circuit board 210.

[0107] like Figure 3 As shown, the front camera module 220 (also referred to as the front camera) may include a front lens 221 and a first motor 222 , wherein the first motor 222 is used to drive the front lens 221 to move to achieve functions such as focusing and anti-shake of the front camera.

[0108] The wide-angle camera module 230 (also referred to as a wide-angle camera) may include a wide-angle lens 231 and a second motor 232 . The second motor 232 is used to drive the wide-angle lens 231 to move to achieve focusing and anti-shake functions of the wide-angle camera.

[0109] The telephoto camera module 240 (also referred to as a telephoto camera) may include a telephoto lens 241 and a third motor 242 . The third motor 242 is used to drive the telephoto lens 241 to move to achieve the focusing and anti-shake functions of the telephoto camera.

[0110] The main camera module 250 (also referred to as the main camera) may include a main camera lens 251 and a main camera motor 252 . The main camera motor 252 is used to drive the main camera lens 251 to move to achieve the focusing and anti-shake functions of the main camera.

[0111] In the embodiment of the present application, the first motor 222, the second motor 232 and the third motor 242 can be implemented as voice coil motors (VCM). Also, in some embodiments, in order to avoid electromagnetic interference, the main camera motor 252 can use a non-electromagnetic drive motor. It is understandable that according to actual needs and specific circuit design, the main camera motor 252 can also use a VCM motor, and there is no specific limitation on this.

[0112] The VCM motor is a voice coil motor in electronics, which has the characteristics of high frequency response and high precision. Figure 4 FIG. 1 shows an exploded view of an exemplary VCM motor structure provided in an embodiment of the present application. Figure 4As shown, the voice coil motor (also known as VCM motor) 400 may include a base 401, a B spring 402, a carrier 403, a coil 404, a magnet 405, a yoke 406, an F spring 407, an F spacer 408, a frame 409 and a shield case 410. Among them, the magnet 405 and the housing 406 constitute the stator parts. The B spring 402, the carrier 403 and the coil 404 constitute the moving parts.

[0113] The main principle of the VCM motor is to control the stretching position of the spring sheet by changing the DC current of the coil 404 within a magnetic field provided by the magnet 405, thereby driving the coil 404 to move.

[0114] When the VCM motor is used in a camera module, the lens in the camera module can be connected to the motor. The arrangement relationship between the camera and the VCM motor is described below in conjunction with the accompanying drawings. Figure 5 The following is a schematic diagram showing the structure of an exemplary camera module provided in an embodiment of the present application. Figure 5 Only the coil 404 and the magnet 405 in the VCM motor are shown, and other components of the VCM motor are not shown. Also, it can be understood that the lens 500 in the embodiment of the present application can be a lens using a VCM motor, such as the above Figure 3 The front lens 221, wide-angle lens 231 and telephoto lens 241 in FIG. Alternatively, when the main camera motor 252 is a VCM motor, the lens 500 can also be a main camera lens, which is not specifically limited.

[0115] like Figure 5 As shown, in the z direction, the magnet 405 and the coil 404 can be arranged relative to each other. Also, the lens 500 can be bonded to one end of the coil 404 (the end away from the magnet 405 in the z direction) and the lens is bonded to the motor. It should be noted that other fixing methods can be used between the lens 500 and the coil 404, such as welding, etc., and there is no specific limitation on this.

[0116] When the coil 404 is energized, the coil 404 can move relative to the magnet 405 , so that the movement of the coil 404 drives the lens 500 (bonded to the coil 404 ) to move.

[0117] Among them, Figure 5 The x-axis direction and the y-axis direction (not shown in the figure, which may be perpendicular to Figure 5The page where the VCM motor is located) can be located in a plane perpendicular to the optical axis of the lens. When the coil 404 of the VCM motor drives the lens 500 to move in the xy plane (i.e., the plane where the x-axis and y-axis are located, or can be called a plane perpendicular to the optical axis), the effect of external vibrations (such as hand shaking) on ​​the clarity of the image captured by the camera module during shooting can be offset as much as possible, so that optical image stabilization (OIS) can be achieved through the VCM motor. Therefore, the movement of the VCM motor in the xy plane can also be called the movement of the VCM motor in the OIS direction.

[0118] as well as, Figure 5 The z-axis in the image may be parallel to the optical axis of the lens. When the coil 404 of the VCM motor drives the lens 500 to move in the z-axis direction, auto focus (AF) of the object can be achieved. Therefore, the movement of the VCM motor in the z-axis direction may also be referred to as the movement of the VCM motor in the AF direction.

[0119] Furthermore, it can be understood that the VCM motor in the embodiment of the present application can also be applied to other components of electronic devices, such as the drive motor of the magnetic arm of a hard disk, etc., without specific limitation.

[0120] The inventor studied the external environment of the VCM motor and found that the components of electronic devices often have magnets. For example, taking a mobile phone as an example, Figure 6 FIG. 1 shows a schematic diagram of the structure of an exemplary electronic device. Figure 6 As shown, multiple components of the mobile phone have magnets. Specifically, Figure 6 (1) in the figure is the front camera. Figure 6 As shown in the dark areas at the four corners of (1), the front camera may include a first magnet 601 (such as a magnet in a VCM motor in the front camera). Figure 6 (2) in the figure is the speaker. Figure 6 As shown in the dark areas at the four corners of (2), the speaker may include a second magnet 602. Figure 6 (3) in is a wide-angle camera, such as Figure 6 As shown in the dark areas on the left and right sides of (3), the wide-angle camera may include a third magnet 603 (such as a magnet in a VCM motor in the wide-angle camera). Figure 6 (4) in the figure is a telephoto camera. Figure 6 As shown in the dark areas on the four sides of (4), the telephoto camera may include a fourth magnet 604 (such as the magnet in the VCM motor in the telephoto camera). Figure 6 (5) may be the main camera, which may not include a magnet, or may include a small amount of magnets relative to other components.

[0121] pass Figure 6 It can be seen that the magnets or other magnetic structures in the camera modules inside the mobile phone and the components such as speakers, hardware, inductors, near field communication (NFC) on the motherboard constitute the complex external magnetic field environment of the VCM motor in the camera module. In addition, the magnetic field generated by the above components often generates electromagnetic interference to the VCM motor in each camera.

[0122] Since the VCM motors in each camera are driven by electromagnetic force, when the magnetic flux of the external magnetic field is greater than a certain threshold, the external magnetic field will produce magnetic interference on the internal magnetic field of the VCM motor, resulting in problems such as camera misfocus or reduced focus performance, camera jitter or reduced anti-shake capability, and partial unclear photos. These problems will affect the photo quality of the electronic device and, in turn, the user's photo experience.

[0123] Therefore, in order to ensure the camera performance of electronic equipment, it is often necessary to perform magnetic interference testing on the VCM motor in the camera.

[0124] However, in the related art, magnetic interference testing is often performed on the whole machine or module end. This test often has disadvantages such as many dependent conditions, low project versatility, low test accuracy, late test completion time, and low reference value of results.

[0125] The inventors have found through research that VCM motors are sensitive to magnetic interference from the external environment. When the external magnetic field is strong, the external magnetic field may have at least the following effects on the VCM motor: 1. The external magnetic field may affect the electromagnetic force inside the voice coil motor; 2. The magnets of the voice coil motor (such as Figure 1 When the middle magnet 105 is a moving part, the magnet may generate a repulsive force or an attractive force with the external magnetic field. The above influence may cause the motor's motion stroke to change.

[0126] Therefore, the embodiment of the present application provides a magnetic interference detection solution for a VCM motor, which can be applied to electronic devices with cameras (using VCM motors for focusing and / or anti-shake), such as mobile phones. The magnetic interference test solution provided in the embodiment of the present application can simulate the external magnetic field environment of the VCM motor, and detect the stroke change of the VCM motor under the simulated external magnetic field environment, thereby realizing the magnetic interference test of the VCM motor. Next, the technical solution of the embodiment of the present application is explained.

[0127] Figure 7 FIG. 1 is a schematic diagram of a magnetic interference test system provided by an embodiment of the present application. Figure 7As shown, the magnetic interference testing system 700 may include a controller 710 , a driving module 720 , a voice coil motor 730 , a magnetic field environment construction device 740 (also referred to as a magnetic field construction device in the embodiment of the present application), and a detection device 750 .

[0128] The controller 710 may be a device having a control function. For example, Figure 8 FIG. 1 is a schematic diagram of an exemplary magnetic interference test system provided in an embodiment of the present application. Figure 8 As shown, the controller 710 may include a computer 711, for example, the computer may be an industrial computer. It should be noted that the controller 710 may also be implemented as other devices with control functions, and no specific limitation is made to this.

[0129] And, the controller 710 can be connected to the driving module 720 for communication. Exemplarily, the controller 710 can include a serial communication interface (Cluster Communication Port, COM), and the COM interface is connected to the driving module 720. It should be noted that the controller 710 can also be connected to the driving module in other ways, such as through Bluetooth or WiFi connection, and there is no specific limitation on this.

[0130] In the embodiment of the present application, the controller 710 may be used to send a driving command signal, and the driving command signal is used to control the voice coil motor 730 to move a preset stroke through the driving module 720. Exemplarily, the driving command signal may be implemented as a command code.

[0131] In some embodiments, the controller 710 may generate different drive command signals. Each drive command signal corresponds to a motor stroke, and each drive command signal is used to control the voice coil motor 730 to move a corresponding stroke. In one embodiment, the controller 710 may send the generated drive command signal to the drive module 720, so that the drive module 720 generates a drive current in response to the drive command signal, and outputs the drive circuit to the coil of the motor 730, so that the VCM motor moves a corresponding stroke. The drive current may be a direct current.

[0132] for example, Fig. 9 FIG. 1 shows a schematic diagram of an exemplary correspondence between a driving command signal and a stroke provided in an embodiment of the present application. Fig. 9As shown, the controller can pre-set n preset command codes, command code 0 (referred to as code0) to command code n-1 (referred to as coden-1). Among them, the first preset command code code0 corresponds to the current I0, the second preset command code code1 corresponds to the current I1, ..., and the nth preset command code coden-1 corresponds to the current In-1. Correspondingly, after the controller 710 outputs the preset command code code0, the driving module 720 can output the current I0 to the coil of the voice coil motor 730, so that the voice coil motor 730 moves the stroke 0; after the controller 710 outputs the preset command code 1 (referred to as code1), the driving module 720 can output the current I1 to the coil of the voice coil motor 730, so that the voice coil motor 730 moves the stroke 1; ...; after the controller 710 outputs the preset command code coden-1, the driving module 720 can output the current In-1 to the coil of the voice coil motor 730, so that the voice coil motor 730 moves the stroke n-1. Among them, n is an integer greater than or equal to 2.

[0133] In some embodiments, the controller 710 may also obtain and store the position parameters of the VCM motor collected by the detection device 750. In one embodiment, the controller 710 may also summarize the position parameters of the VCM motor obtained and display the summary results so that the tester can intuitively observe the interference of the VCM motor by the external magnetic field environment. In another embodiment, the controller 710 may also perform data analysis on the position parameters of the VCM motor obtained to quantify the degree of interference of the VCM motor by the external magnetic field environment.

[0134] The driving module 720 may be implemented as a driving board. For example, it may be implemented as an integrated circuit (IC) chip. Figure 8 , the driving module 720 may include a main driving board 721 and a slave driving board 722. The main driving board 721 is used for overall driving, and a single slave driving board 722 is used to drive a single VCM motor. Optionally, the main driving board 721 and the slave driving board 722 may be connected by pins. It should be noted that the main driving board 721 and the slave driving board 722 may also be connected by wire in other ways, or may be connected by wireless means such as Bluetooth, and there is no specific limitation on this.

[0135] In one example, Fig.10 FIG. 1 is a schematic diagram of an exemplary driving module. Fig.10As shown, if magnetic interference detection is required for m voice coil motors, the driving module 720 may include a main driving board 721 and m slave driving boards 7221 to 722m. The first slave driving board 7221 is used to drive the first voice coil motor 731, the second slave driving board 7222 is used to drive the second voice coil motor 732, ..., and the mth slave driving board 722m is used to drive the mth voice coil motor 73m. Wherein, m is a positive integer greater than or equal to 1.

[0136] The driving module 720 may be electrically connected to the voice coil motor 730 , for example, by a pin connection, which is not specifically limited. In one example, the driving module 720 may be connected to the coil of the voice coil motor 730 to provide a driving current to the coil of the voice coil motor 730 .

[0137] The driving module 720 is used to generate a driving current corresponding to the driving instruction signal according to the driving instruction signal sent by the controller 710. Fig. 9 When the driving module 720 receives the driving command signal sent by the controller 710 as command code 1 (code1), it can generate a driving current I1 corresponding to the command code 1 (code1) based on the correspondence between the preset command code and the current, and use the driving current I1 to drive the voice coil motor 730 so that the voice coil motor 730 moves by a stroke of 1. It should be noted that other contents of the driving module 720 can refer to the above-mentioned part of the embodiment of the present application in combination with Fig. 9 The relevant description is omitted here.

[0138] The voice coil motor 730 may be a VCM motor in a camera module of an electronic device. For its specific content, please refer to the relevant description in the above part of the embodiment of the present application, which will not be repeated here.

[0139] In the embodiment of the present application, in order to facilitate the detection, the coil of the VCM motor is connected to the test lens. For example, Fig.11 A schematic structural diagram of an exemplary VCM motor in the xz direction provided in an embodiment of the present application is shown. Fig.12 FIG. 1 shows a schematic diagram of the structure of an exemplary VCM motor in the xy direction provided by an embodiment of the present application. Fig.11 and Fig.12 As shown, in the z direction, a test lens 761 is bonded to the side of the coil 7301 away from the magnet 7302. It should be noted that the embodiment of the present application does not impose any specific limitation on the shape of the test lens 761.

[0140] And, in some embodiments, to facilitate testing, continue to see Fig.11 and Fig.12, a reflector 762 is provided on the side of the test lens 761 away from the coil 7301 in the z direction. The reflector 762 is an object that can reflect incident light. Optionally, the reflector 762 can be provided at the center of the test lens 761. It should be noted that the embodiment of the present application does not limit the specific shape of the reflector 762. In other embodiments, the test lens 761 can be directly implemented as a reflector, in which case the reflector 762 does not need to be provided on the test lens 761.

[0141] And, in some embodiments, to facilitate testing, continue to see Fig.11 and Fig.12 , at least two markers 763 are also provided on the side of the test lens 761 away from the coil 7301 in the z direction. The marker 763 is an object that can serve as a marker. It should be noted that the embodiment of the present application does not specifically limit the specific shape and setting position of the marker 763. Alternatively, the embodiment of the present application can directly use the edge or corner of the reflective sheet 762 for marking.

[0142] The magnetic field environment construction device 740 is used to construct different external magnetic field environments for the voice coil motor 730, such as a magnetic environment and a non-magnetic environment. In some embodiments, if it is necessary to construct a magnetic field for multiple VCM motors, for example, continue to refer to Fig.10 , if magnetic interference tests need to be performed on m VCM motors, each VCM motor may correspond to a magnetic field environment construction device. For example, the first magnetic field environment construction device 741 may construct an external magnetic field environment for the first voice coil motor 731, the second magnetic field environment construction device 742 may construct an external magnetic field environment for the second voice coil motor 732, ..., the mth magnetic field environment construction device 74m may construct an external magnetic field environment for the mth voice coil motor 73m.

[0143] In the embodiment of the present application, the magnetic field environment construction device 740 may place at least one magnet (which may be referred to as a magnet component in the embodiment of the present application) around the VCM motor, and each magnet may be placed in the magnetic field environment construction device 740 or removed from the magnetic field environment construction device 740. In other embodiments, the magnetic field environment construction device 740 may not place a magnet around the VCM motor.

[0144] In some embodiments, Figure 13A-13B FIG. 1 shows a schematic diagram of the structure of an exemplary magnetic field environment construction device provided in an embodiment of the present application at different angles. Fig.13A and Fig. 13B As shown, the magnetic field environment construction device 740 may include a motor fixture 7401 (which may also be referred to as a first bearing structure in the embodiment of the present application) and a magnet fixture 7402 (which may also be referred to as a second bearing structure in the embodiment of the present application).

[0145] The motor fixture 7401 is used to fix the VCM motor to be tested. For example, Fig.14 A schematic structural diagram of a magnetic field environment construction device in the xz direction provided in an embodiment of the present application is shown. Fig.15 FIG. 1 shows a schematic diagram of the structure of a magnetic field environment construction device provided in an embodiment of the present application in the xy direction. Fig.14 and Fig.15 As shown, the motor fixture 7401 may have a first groove A1, and the first groove A1 is used to place the VCM motor. When a magnetic interference test is required for the VCM motor, the VCM motor to be tested can be placed in the first groove A1, and after the test is completed, the VCM motor to be tested can be taken out of the first groove A1.

[0146] Furthermore, each magnet fixture 7402 may be provided with a plurality of magnet placement positions, and each magnet placement position may be provided with a magnet. Fig.14 and Fig.15 The magnet fixture 7402 may be provided with three second grooves A2 (also referred to as bearing positions in the present embodiment), and each second groove A2 may be provided with a magnet. Each magnet may be placed in the second groove A2 and taken out from the second operation A2 as required, and no specific limitation is imposed on this.

[0147] And, in terms of the setting position, the magnetic fixture 7402 can be set around the motor fixture 7401 to simulate and emulate the surrounding magnetic field environment of the motor fixture 7401. In some embodiments, the magnetic fixture 7402 can be set on the xy plane. It should be noted that since other devices are often set on the xy plane of the camera module in electronic devices such as mobile phones, this setting can better simulate the real interference scene of the VCM motor in the camera module, and there is no need to perform interference testing in the z direction. While ensuring the accuracy of the interference test, the test efficiency is improved, the test cost is reduced, and the volume of the magnetic field environment construction device 740 is reduced.

[0148] In one embodiment, continue to see Fig.15 , the number of magnetic fixtures 7402 is 4, of which 2 magnetic fixtures 7402 ( Fig.15 The magnet fixture on the left side of the VCM motor and the magnet fixture on the right side of the VCM motor) can be set in the x direction (or the direction of the x-axis), and the other two magnet fixtures 7402 ( Fig.15 The magnet fixture located on the upper side of the VCM motor and the magnet fixture located on the lower side of the VCM motor can be set in the y direction (or the direction of the y axis). Through this setting, the external magnetic field environment of the VCM motor in the xy plane can be simulated.

[0149] In another embodiment, the embodiment of the present application may set a magnetic fixture 7402 in the same direction of the external magnetic interference device. The external magnetic interference device may be a device that has magnetic interference on the VCM motor of the camera module. For example, taking the VCM motor in the front camera module as an example, the external magnetic interference device may include the VCM motor in the wide-angle camera module, the VCM motor in the telephoto camera module, a speaker and other devices. If the VCM motor in the wide-angle camera module is located in the positive x direction of the VCM motor in the front camera module, a magnetic fixture 7402 may be set in the positive x direction.

[0150] It should be noted that in the embodiment of the present application, the magnetic fixture 7402 can also be set to other positions or other quantities according to actual test needs and specific test requirements, and the embodiment of the present application does not impose specific restrictions on this.

[0151] For each magnet fixture 7402, the user can freely adjust the number of magnets or the magnetic flux of the magnets inserted into the magnet fixture 7402 to change the magnetic flux of the external magnetic field environment of the VCM motor. In this way, a magnetic field environment with adjustable magnetic flux can be constructed around the VCM motor.

[0152] In some embodiments, Fig.16 FIG. 1 shows a schematic structural diagram of an exemplary magnetic fixture provided in an embodiment of the present application. Fig.16 As shown, the magnet fixture 7402 ( Fig.15 The magnet fixture located on the right side of the VCM motor includes three second grooves. The user can choose whether to place the first magnet 801 in the first second groove, the user can choose whether to place the second magnet 802 in the second second groove, and the user can choose whether to place the third magnet 803 in the third second groove. The magnetic flux of the first magnet 801, the second magnet 802 and the third magnet 803 can be different. Alternatively, the magnetic flux of the first magnet 801, the second magnet 802 and the third magnet 803 can be the same, and there is no specific limitation on this.

[0153] In one example, Fig.17 A schematic diagram of a magnet placement method provided in an embodiment of the present application is shown. Fig.17 The middle gray part is the voice coil motor 730.

[0154] like Fig.17As shown, the magnets placed in the four magnet fixtures 7402a to 7402d can be different. For example, the first magnet fixture 7402a can be used to place the first magnet 801 and the second magnet 802, the second magnet fixture 7402b can be used to place the first magnet 801 and the third magnet 803, the third magnet fixture 7402c can be used to place the first magnet 801, the second magnet 802 and the third magnet 803, and the fourth magnet fixture 7402d can be used to place the second magnet 802 and the third magnet 803.

[0155] It should be noted that in the embodiments of the present application, the user can also choose other methods to place the magnet according to actual test needs and specific test requirements, which will be explained below through multiple examples.

[0156] In another example, the user may also not place magnets in each magnet fixture 7402 to simulate a non-magnetic environment of a VCM motor. Fig.17 No magnets may be placed in any of the four magnet fixtures 7402a to 7402d.

[0157] In another example, for a single magnet, the placement of the magnet in the magnet fixture can be adjusted to change the magnetic flux. Fig.17 For the first magnet 801 in the magnet clamp 7402c, it can be placed in other second grooves of the magnet clamp 7402c, such as placed in the second groove where the second magnet 802 is located or placed in the groove where the third magnet 803 is located, to change the distance between the first magnet 801 and the VCM motor, and there is no specific limitation on this.

[0158] In some embodiments, see Fig.14 The magnetic field environment construction device may further include a top cover 7403 , which may be buckled onto the magnetic fixture 7402 .

[0159] In some embodiments, the magnetic field environment construction device may further include a magnetic fixture moving device, which can adjust the relative distance and relative position between the magnetic fixture 7402 and the VCM motor. Fig.17 Taking the magnet fixture 7402 in the x-axis direction as an example, the magnet fixture moving device can move the magnet fixture 7402 in the x-axis direction to adjust the relative distance between the magnet fixture 7402 and the VCM motor. Also, the magnet fixture moving device can move the magnet fixture 7402 in the y-axis direction to adjust the relative position between the magnet fixture 7402 and the VCM motor.

[0160] In some embodiments, a motor moving device may be further provided at the bottom of the magnetic field environment construction device, and the motor moving device may be moved by adjusting the position of the magnetic field environment construction device.

[0161] The detection device 750 is used to detect the displacement change parameters of the VCM motor under different magnetic field environments. The displacement change parameters can reflect the stroke change of the VCM motor under the influence of the external magnetic field environment. Exemplarily, the detection device 750 can detect the tilt angle and / or position of the VCM motor. It should be noted that in the embodiment of the present application, the detection device can also be called a laser machine.

[0162] In one embodiment, Fig.18 FIG. 1 is a schematic diagram showing the structure of an exemplary detection device provided in an embodiment of the present application. Fig.18 As shown, the detection device 750 may include a laser test module 751, a fixing bracket 752, a base 753 and a device bracket 754. Among them, one end (top end) of the fixing bracket 752 is used to fix the laser test module 751, and the other end (bottom end) of the fixing bracket 752 extends out of the base 753 in the horizontal direction. The device bracket 754 is provided on the base 753, and the device bracket 754 is used to place the magnetic field environment construction device 740, and the magnetic field environment construction device 740 is located directly below the laser test module 751.

[0163] The laser test module 751 is used to test the displacement change parameters of the VCM motor. In one example, Fig.19 FIG. 1 shows a schematic diagram of the structure of an exemplary laser test module provided in an embodiment of the present application. Fig.19 As shown, the laser testing module 751 may include a laser system A1, a camera system B1, and a collimator system C1.

[0164] The laser system A1 includes a collimated laser diode (LD) A11 and a collimating lens A12. After the output beam of the collimated LD A11 is collimated by the collimating lens A12, a parallel laser beam can be output to the surface of the voice coil motor 730 (for example, to the test lens 761).

[0165] The camera system B1 includes an objective lens B11, a light emitting diode (LED) B12, a condenser lens B13, and a first charge-coupled device (CCD) B14. The camera system B1 can detect the position change of the VCM motor in the x direction, the y direction, and the z direction (or the direction of the z axis). For example, in a reflective sheet (such as Fig.11 and Fig.12In the case where the reflective sheet 762 in the image is used as a marker, the camera system B1 can capture images of the reflective sheet to calculate the displacement according to the contour change or position change of the reflective sheet. For example, if the position of the VCM motor changes on the z-axis, the contour size of the reflective sheet will change, and if the position of the VCM motor changes on the x-axis or y-axis, the contour of the reflective sheet will move on the x-axis or y-axis. In another exemplary embodiment, when the marker (such as Fig.11 and Fig.12 In the case where the reflective sheet marker 763 in the image is a marker, the camera system B1 can capture an image of the marker to calculate the displacement in the z-axis direction according to the change in the marker's contour or the change in the distance between the markers. In addition, the camera system B1 can also determine the displacement of the VCM motor on the x-axis according to the change in the displacement of the marker in the x-axis direction. Similarly, the camera system B1 can also determine the displacement of the VCM motor on the y-axis according to the change in the displacement of the marker in the y-axis direction.

[0166] The collimator system C1 may include an imaging mirror C11 and a second photosensitive coupling component C12. Fig.11 and Fig.12 After being reflected by the reflective sheet 762 in the image processing apparatus, the reflected light beam can be reflected into the collimator system C1. The collimator system C1 can detect the tilt angle of the VCM motor according to the angle change of the reflected light beam.

[0167] In some embodiments, see Figure 8 In order to facilitate users or testers to view test results and adjust the test process, the detection device 750 may also include a coarse adjustment contour display 755 and a position display 756.

[0168] The coarse adjustment profile display 755 can display a real-time image of the VCM motor. In one embodiment, during the test process, the user can observe the specific position of the VCM motor through the coarse adjustment profile display 755. Also, before or during the test process, the user can align the center of the VCM motor and the center of the laser through the coarse adjustment profile display 755.

[0169] The position display 756 is used to display the position parameters of the VCM motor. For example, the position display 756 can display the position of the VCM motor in the x direction, the y direction, and the z direction, and can also display the tilt angle of the VCM motor.

[0170] In some embodiments, see Figure 8, the magnetic interference test system 700 may also include an acquisition card 760 and an acquisition card board 770. And, the acquisition card 760 may be connected to the position display 756, for example, the two may be pin-connected. The acquisition card 760 may be connected to the acquisition card board 770, for example, the two may be connected via a polar line connection line. And, the acquisition card board 770 may be connected to the controller 710 (for example, the computer 711), for example, the acquisition card board may be inserted into the motherboard of the computer 711

[0171] The acquisition card 760 can acquire the photoelectric signal (photoelectric signal of the position parameter of the VCM motor) acquired by the laser test module 751 through the position display 756, and convert the acquired photoelectric signal into a digital signal. And, the digital signal is transmitted to the controller 710 (such as the computer 711) through the acquisition card board 770.

[0172] In the embodiment of the present application, by detachably placing the magnet in the magnetic field environment construction device, a magnetic field environment with adjustable magnetic flux can be constructed around the VCM motor using the magnetic field environment construction, thereby simulating the real environment of magnetic interference to the VCM motor in the electronic device (complete machine). Based on the magnetic field environment construction device and the detection device, the position parameters of the VCM motor under different magnetic interference environments can be detected, and the degree of interference of the VCM motor under different magnetic interference environments can be accurately quantified, thereby realizing accurate magnetic interference detection of the VCM motor.

[0173] Furthermore, it should be noted that due to the high integration of mobile phones, the devices in the mobile phones are often arranged more densely, and the VCM motor in the camera module is often interfered by the magnetic field of other devices. Therefore, through the solution provided in the embodiment of the present application, the real magnetic field environment of the VCM motor in the camera module of the mobile phone can be accurately simulated and emulated, and the magnetic interference of the VCM motor can be accurately detected.

[0174] Furthermore, it should be noted that the solution provided in the embodiment of the present application can also be applied to other motors driven by electromagnetic force, without any specific limitation.

[0175] In some embodiments, in order to ensure the accuracy of the test results, the magnetic field environment construction device can be made of non-magnetic materials. Exemplarily, the magnet fixture and the magnet top cover can be made of non-magnetic materials. In another exemplary embodiment, the test device can also be made of non-magnetic materials. In another exemplary embodiment, the pins connected to the VCM motor (such as the pins connecting the drive board and the VCM motor), screws (such as screws on the magnetic field environment construction device, screws on the fixed bracket of the test device, etc.) can all be made of non-magnetic materials.

[0176] In this way, other interference sources can be decoupled and eliminated to the greatest extent, thereby improving the accuracy of magnetic interference test results.

[0177] Optionally, in order to further improve the accuracy of the test results, all materials except the VCM motor body and the magnet in the magnetic interference test system are made of non-magnetic materials.

[0178] Based on the same inventive concept, the embodiment of the present application also provides a magnetic interference testing method, which is described below with reference to the accompanying drawings.

[0179] Fig. 20 FIG. 1 is a flow chart of a magnetic interference testing method provided by an embodiment of the present application. Fig. 20 As shown, the magnetic interference testing method may include the following steps S2001 to S2010.

[0180] S2001, the user does not place a magnet in the magnetic field environment construction device to construct a non-magnetic environment for the VCM motor.

[0181] For example, in S2001, the user may not place any magnet in each magnet fixture. Fig.17 , no magnet may be placed in any of the magnet fixtures 7402a to 7402d.

[0182] S2002, the controller (such as an industrial computer) sends a driving instruction signal to the driver. Exemplarily, the controller can send the driving instruction signal through control software.

[0183] For example, the controller may send any one of the preset n preset command codes code0 to coden-1. The preset command code may refer to the above-mentioned part of the embodiment of the present application in combination with Fig. 9 , and no specific limitation is given to this.

[0184] In one example, if it is necessary to measure the position parameters of the VCM motor at different strokes, the controller can send multiple drive command signals to the driver in sequence. Fig. 9 The controller may first send a preset command code code0 to the driver. After completing the test of stroke 0, the controller may then send a preset command code code1 to the driver, ..., until the test of stroke n-1 is completed.

[0185] S2003, the driver controls the movement of the VCM motor based on the drive command signal.

[0186] For example, after receiving the driving instruction signal, the driver can generate a driving current corresponding to the driving instruction signal. Then, the driving current is output to the coil of the VCM motor. Fig. 9Taking the driving instruction signal as the preset command code code2 as an example, after receiving the preset command code code2, the driver can determine the current I2 corresponding to the preset command code code2, and then output the current I2 to the coil of the VCM motor to drive the VCM motor to move stroke 2.

[0187] S2004: The detection device detects the first position parameter of the VCM motor. For example, the detection device may use a laser test module (such as Fig.19 The laser test module 751 shown in the figure is used to detect the first position parameter of the VCM motor, such as one or more of the position of the VCM motor in the x direction, the position in the y direction, and the position in the z direction. For another example, the tilt angle of the VCM motor.

[0188] In some embodiments, when the VCM motor is in a non-magnetic environment, the detection device can detect the first position parameters of the VCM motor at different strokes.

[0189] In some embodiments, the controller can control the VCM motor to move along the AF direction through the driver.

[0190] The detection device can test the position parameters of the VCM motor when it moves in the AF direction. Exemplarily, when the controller controls the VCM motor to move in the AF direction through the driver, the controller can output multiple preset command codes in sequence to control the VCM motor to move in the AF direction (z direction) according to multiple strokes, and the detection device can detect the position parameters of the VCM motor in each stroke. For example, when the controller controls the VCM motor to move in the AF direction by driving the driver, the detection device can detect the displacement and tilt angle of the VCM motor in the z direction. For another example, the detection device can detect the displacement and tilt angle of the VCM motor in the x direction, y direction, and z direction.

[0191] In this way, the controller can accurately detect the effect of magnetic interference on the AF characteristics of the VCM motor.

[0192] In other embodiments, the controller can control the VCM motor to move along the OIS direction through a driver. Specifically, the controller can first control the VCM motor to move along the x direction through the driver, and detect the position parameters of the VCM motor under multiple different strokes through the detection device. For example, when the controller controls the VCM motor to move along the x direction by driving the driver, the detection device can detect the displacement and tilt angle of the VCM motor in the x direction. For another example, the detection device can detect the displacement and tilt angle of the VCM motor in the x direction, y direction, and z direction. In the embodiment of the present application, the detection personnel can select the required position parameters for detection according to the specific test needs or test requirements, and there is no specific limitation on this.

[0193] Then, the controller can control the VCM motor to move along the y direction through the driver, and detect the position parameters of the VCM motor under multiple different strokes through the detection device. For example, when the controller controls the VCM motor to move along the x direction by driving the driver, the detection device can detect the displacement and tilt angle of the VCM motor in the x direction. For another example, the detection device can detect the displacement and tilt angle of the VCM motor in the x direction, y direction, and z direction. It should be noted that the specific detection method in the x direction and y direction is the same as the specific detection method in the AF direction. Please refer to the relevant description of the previous embodiment, which will not be repeated here. In this way, the controller can accurately detect the impact of magnetic interference on the OIS characteristics of the VCM motor.

[0194] S2005, the detection device sends the first position parameter to the controller.

[0195] In some embodiments, the detection device (such as an industrial computer) can summarize the first position parameters. Optionally, the detection device can also display the summarized first position data. Optionally, the detection device can also perform data analysis on the first position data.

[0196] S2006, the user puts a magnet into the magnetic field environment construction device to construct an external magnetic interference environment for the VCM motor, that is, an environment with external magnetic interference.

[0197] In some embodiments, the user can place magnets in one or more magnet fixtures. Among them, one or more magnets can be placed in the magnet fixture where the magnet needs to be placed. In some embodiments, the user can construct an external magnetic interference environment with different magnetic fluxes by adjusting at least one of the following methods: the number of magnets placed, the magnetic flux of the magnets, the placement position of the magnets in the same magnet fixture (different placement positions have different distances from the VCM motor), and the selection of magnets. Optionally, the user can also construct an external magnetic interference environment with different magnetic fluxes by adjusting the distance between the magnet fixture (a magnet fixture with at least one magnet placed) and the VCM motor.

[0198] S2007, the controller (such as an industrial computer) sends a driving instruction signal to the driver. Exemplarily, the controller can send the driving instruction signal through control software.

[0199] The specific implementation of S2007 is the same as that of S2002, which will not be described in detail. S2008: The driver controls the VCM motor to move based on the drive command signal.

[0200] Among them, the specific implementation of S2008 is the same as that of S2003, which will not be repeated here.

[0201] S2009, the detection device detects the second position parameter of the VCM motor. The specific implementation of S2009 is the same as S2009, which will not be described in detail.

[0202] S2010, the detection device sends the second position parameter to the controller.

[0203] In some embodiments, in order to fully detect the magnetic interference performance of the VCM motor, the user can adjust the magnet placement scheme of the magnetic field environment construction device multiple times to test multiple external magnetic interference environments with different magnetic fluxes (hereinafter referred to as magnetic interference environments). Specifically, after each adjustment of the magnet placement scheme, S2007 to S2010 can be repeatedly performed.

[0204] For example, Fig.21 FIG. 2 shows an exemplary data aggregation schematic diagram provided in an embodiment of the present application. Fig.21 As shown, in a controller (such as an industrial computer), multiple data are stored correspondingly. For example, the non-magnetic environment corresponds to test data 0 (i.e., the first position data); the magnetic environment 1 corresponds to test data 1 (i.e., the second position data); ...; the magnetic environment k corresponds to test data k. Wherein, k is an integer greater than or equal to 1.

[0205] In some embodiments, the controller may perform magnetic interference tests on a plurality of different types of VCM motors, and may execute S2001 to S2010 for each type of VCM motor.

[0206] Exemplarily, for each model of VCM motor, multiple magnetic environments can be simulated by a magnetic field environment construction device, and then in each magnetic environment, the position parameters of the VCM motor under multiple strokes (hereinafter referred to as the second position parameters) are determined. Also, the position parameters of the VCM motor under multiple strokes in a non-magnetic environment (hereinafter referred to as the first position parameters) are determined. Based on the deviation between the second position parameters and the first position parameters in multiple magnetic environments, the magnetic interference characteristics of the VCM motor of this model are determined.

[0207] In this example, the magnetic interference characteristics of the VCM motor can be determined by data analysis.

[0208] In another exemplary embodiment, for each model of VCM motor, the controller may generate a relationship curve between the stroke and the position parameter in each magnetic environment based on the position parameters of multiple strokes in each magnetic environment (i.e., the second position parameter in each magnetic environment, that is, each second position parameter includes the position parameters of the VCM motor in multiple strokes). The controller determines the magnetic interference characteristics of the VCM motor based on the corresponding relationship curves in multiple magnetic environments and the relationship curve between the stroke and the position parameter in the non-magnetic environment.

[0209] Among them, the greater the deviation of the corresponding relationship curves under multiple magnetic environments compared to the relationship curves under non-magnetic environments, the more seriously the VCM motor is affected by the magnetic interference.

[0210] For example, for each magnetic environment, the controller can obtain the position parameters of the VCM motor when it moves along the AF direction, and then generate a relationship curve of the AF characteristics in the magnetic environment based on the position parameters. Similarly, the controller can also generate a relationship curve of the OIS characteristics in the magnetic environment. Then, based on the relationship curves of the AF characteristics in multiple magnetic environments, the controller can determine the degree of interference of the magnetic interference on the AF characteristics of the VCM motor. Similarly, based on the relationship curves of the OIS characteristics in multiple magnetic environments, the controller can determine the degree of interference of the magnetic interference on the OIS characteristics of the VCM motor.

[0211] In this example, the magnetic interference characteristics of the VCM motor can be quantified by generating a characteristic curve, which helps testers to intuitively understand the differences in magnetic interference characteristics of various types of VCM motors.

[0212] It should be noted that, after obtaining the first position parameter and the second position parameter in each magnetic environment, the embodiment of the present application can also quantify or represent the magnetic interference characteristics of the VCM motor in other ways, and there is no specific limitation on this.

[0213] In addition, the embodiment of the present application also provides another magnetic interference test method, which is different from the magnetic interference detection method shown in the previous embodiment in that the magnetic interference test method of the embodiment of the present application does not need to use S2001 to S2005 to detect the first position parameter of the VCM motor in a non-magnetic environment. In the embodiment of the present application, the tester uses the empirical value or theoretical value of the position parameter of the VCM motor in a non-magnetic environment under multiple strokes as the first position parameter. In addition, the embodiment of the present application also provides another magnetic interference test method, which is different from the magnetic interference test method of the above embodiment in that the magnetic interference test method of the embodiment of the present application can determine the external magnetic field strength of the VCM motor to be tested in the electronic device, such as using a sensor that can detect the magnetic field strength, such as a Hall sensor. Then the tester can construct an external magnetic field environment with the same magnetic field strength through a magnetic field environment construction device, and then execute S2005 to S2010.

[0214] In addition, the inventors found through verification that Fig. 22 A curve diagram showing the stroke of an exemplary VCM motor in the AF direction and the command code value (CODE value) provided in an embodiment of the present application is shown. Fig.23 A curve diagram showing the stroke and CODE value of an exemplary VCM motor in the OIS direction provided in an embodiment of the present application is shown.

[0215] The inventors found through research that in a non-magnetic environment (i.e., in a rational state), the stroke of the VCM motor in the AF direction increases linearly with the CODE value. Fig. 22 As shown, the inventor simulates the magnetic interference of different magnetic fluxes (or different magnetic field strengths) on the VCM motor by adjusting the distance between the VCM motor and the magnet. The closer the distance between the VCM motor and the magnet, the stronger the external magnetic field strength of the VCM motor, and the stronger the magnetic interference to the VCM motor.

[0216] Specifically, curve L221 represents the corresponding relationship between the stroke of the VCM motor in the AF direction and the CODE value when the magnet is 2.5mm away from the VCM motor. At this time, the motor is subject to magnetic interference from the magnet and cannot be driven normally in the AF direction. And curve L222 represents the corresponding relationship between the stroke of the VCM motor in the AF direction and the CODE value when the magnet is 3mm away from the VCM motor. As shown in curve L222, the stroke start position of the VCM motor in the AF direction is offset by about 50um.

[0217] In addition, curve L223 represents the correspondence between the stroke of the VCM motor in the AF direction and the CODE value when the magnet is 4.5 mm away from the VCM motor, and curve L224 represents the correspondence between the stroke of the VCM motor in the AF direction and the CODE value when the magnet is 5.5 mm away from the VCM motor.

[0218] By comparing curves L221 to L224 , it can be seen that as the distance between the VCM motor and the magnet gradually increases, that is, when the external magnetic field strength of the VCM motor decreases, the displacement of the stroke of the VCM motor in the AF direction gradually decreases.

[0219] as well as, Fig.23 A schematic curve diagram showing the stroke of the VCM motor in the OIS direction and the CODE value.

[0220] The inventors found through research that in a non-magnetic environment (i.e., in a rational state), the stroke of the VCM motor in the OIS direction and the CODE value are first stabilized to a value. When the CODE value reaches a certain value, the stroke increases rapidly with the CODE value. When the CODE value increases to a certain value, the stroke quickly stabilizes to a constant value. When there is a magnet, such as Fig.23 As shown, the inventor simulates the magnetic interference of different magnetic fluxes (or different magnetic field strengths) on the VCM motor by adjusting the distance between the VCM motor and the magnet. The closer the distance between the VCM motor and the magnet, the stronger the external magnetic field strength of the VCM motor, and the stronger the magnetic interference to the VCM motor.

[0221] Specifically, curve L231 represents the correspondence between the stroke of the VCM motor in the OIS direction and the CODE value when the magnet is 2.5 mm away from the VCM motor; curve L232 represents the correspondence between the stroke of the VCM motor in the OIS direction and the CODE value when the magnet is 3 mm away from the VCM motor; curve L233 represents the correspondence between the stroke of the VCM motor in the OIS direction and the CODE value when the magnet is 4 mm away from the VCM motor; curve L234 represents the correspondence between the stroke of the VCM motor in the OIS direction and the CODE value when the magnet is 4.5 mm away from the VCM motor; curve L235 represents the correspondence between the stroke of the VCM motor in the OIS direction and the CODE value when the magnet is 5.5 mm away from the VCM motor.

[0222] Comparing curves L235, L231 and L232, it can be seen that when the magnet is 3mm away from the VCM motor, the OIS start position sends an offset of about 12 codes. Similarly, at any code value in the target command code range, the closer the distance between the magnet and the VCM motor, the greater the travel offset of the VCM motor in the OIS direction.

[0223] Based on the above Fig. 22 From the analysis, we can know that different distances between the magnet and the VCM motor represent different external magnetic field strengths of the VCM motor. Therefore, different magnetic interference strengths have different effects on the travel of the VCM motor in the AF direction. The greater the magnetic interference strength, the greater the impact on the travel of the VCM motor in the AF direction. Similarly, based on the above Fig.23 From the analysis, it can be seen that the greater the magnetic interference intensity, the greater the impact on the VCM motor's stroke in the OIS direction.

[0224] Therefore, the above content proves that the position of the VCM motor can be used to characterize the magnetic interference characteristics of the VCM motor, thereby verifying the feasibility of the above solution of the embodiment of the present application.

[0225] In addition, it is understood that, in order to implement the above functions, the electronic device includes hardware and / or software modules corresponding to the execution of each function. In combination with the algorithm steps of each example described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application in combination with the embodiments, but such implementation should not be considered to be beyond the scope of the present application.

[0226] In one example, the present application also provides a device, which may include: a processor and a transceiver / transceiver pin, and optionally, a memory.

[0227] The various components of the device are coupled together through a bus, wherein the bus includes a power bus, a control bus and a status signal bus in addition to a data bus. However, for the sake of clarity, various buses are referred to as buses.

[0228] Optionally, the memory can be used for the instructions in the aforementioned method embodiment. The processor can be used to execute the instructions in the memory, and control the receiving pin to receive a signal, and control the sending pin to send a signal.

[0229] The device may be the controller or a chip of the controller in the above method embodiment.

[0230] Among them, all relevant contents of each step involved in the above method embodiment can be referred to the functional description of the corresponding functional module, and will not be repeated here.

[0231] The steps performed by the controller in the magnetic interference detection method provided in the above embodiment of the present application can also be performed by a chip system included in the controller, wherein the chip system can include a processor and a Bluetooth chip. The chip system can be coupled to a memory so that when the chip system is running, the computer program stored in the memory is called to implement the steps performed by the above controller. The processor in the chip system can be an application processor or a processor other than an application processor.

[0232] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A magnetic field construction device, characterized in that: include: A first bearing structure, used for bearing a voice coil motor of an electronic device; At least one second bearing structure is arranged on the periphery of the first bearing structure, wherein each of the second bearing structures comprises at least one bearing position, each bearing position is used to detachably fix a magnetic component, Wherein, when no magnetic component is placed in the magnetic field construction device, the magnetic field construction device is used to construct a non-magnetic environment of the voice coil motor, wherein the non-magnetic environment is used to obtain a first position parameter of the voice coil motor, and the first position parameter includes a position parameter of the voice coil motor under a plurality of strokes in the non-magnetic environment; In the case where the magnetic field construction device places a magnetic component on at least one second bearing structure, the magnetic field construction device is further used to construct a plurality of magnetic environments of the voice coil motor, wherein each magnetic environment is used to obtain a second position parameter of the voice coil motor in each magnetic environment, wherein the second position parameter of each magnetic environment includes position parameters of the voice coil motor in each magnetic environment at a plurality of strokes; The deviations between the second position parameters and the first position parameters in the plurality of magnetic environments are used to characterize the magnetic interference characteristics of the voice coil motor.

2. The magnetic field construction device according to claim 1, characterized in that: The at least one second supporting structure is arranged along the circumferential direction of the voice coil motor.

3. The magnetic field construction device according to claim 2, characterized in that: The number of the at least one second bearing structure is multiple; Wherein, a first number of the second bearing structures are arranged in a first direction, and a second number of the second bearing structures are arranged in a second direction; The sum of the first number and the second number is equal to the total number of the at least one second bearing structure, and the first direction and the second direction are located on the plane where the circumferential direction is located.

4. The magnetic field construction device according to claim 1, characterized in that: The second single bearing structure comprises a first bearing position and a second bearing position, The first bearing position has a first distance from the voice coil motor, and the second bearing position has a second distance from the voice coil motor. The first distance and the second distance are different.

5. The magnetic field construction device according to claim 1, characterized in that: The second single bearing structure comprises a first bearing position and a second bearing position, The first bearing position is used to detachably fix the first magnetic component. The second bearing position is used to detachably fix the second magnetic component. The first magnet component and the second magnet component have different magnetic fluxes.

6. The magnetic field construction device according to claim 1, characterized in that: The magnetic field construction device is made of non-magnetic material.

7. The magnetic field construction device according to any one of claims 1 to 6, characterized in that: The voice coil motor is a voice coil motor in the camera module of the electronic device.

8. A magnetic interference test system, characterized in that: include: The magnetic field construction device according to any one of claims 1 to 7; A voice coil motor, fixed to the first bearing structure of the magnetic field construction device; A controller, used to drive the voice coil motor to operate; The detection device is used to detect the position parameters of the voice coil motor during the operation of the voice coil motor.

9. The magnetic interference test system according to claim 8, characterized in that: The position parameter includes one or more of a position of the voice coil motor in a first direction, a position in a second direction, a position in a third direction, and a tilt angle of the voice coil motor.

10. The magnetic interference test system according to claim 8, characterized in that: The detection device is used to detect a first position parameter of the voice coil motor during the operation of the voice coil motor when the magnetic field construction device is in the first state; and, further configured to detect a second position parameter of the voice coil motor during operation of the voice coil motor when the magnetic field construction device is in the second state; The magnetic flux of the magnetic field construction device in the first state is different from that of the magnetic field construction device in the second state.

11. A magnetic interference testing method, characterized in that: The method is applied to the magnetic interference test system according to any one of claims 8 to 10, wherein, when no magnetic component is placed in the magnetic field construction device, the magnetic field construction device is used to construct a non-magnetic environment of the voice coil motor, and, when the magnetic field construction device places a magnetic component in at least one second bearing structure, the magnetic field construction device is also used to construct multiple magnetic environments of the voice coil motor; The method comprises: The controller drives the voice coil motor to operate; The detection device detects the position parameters of the voice coil motor during the operation of the voice coil motor. The detection device detects the position parameters of the voice coil motor during the operation of the voice coil motor, including: In the non-magnetic environment, the detection device obtains a first position parameter of the voice coil motor, wherein the first position parameter includes position parameters of the voice coil motor in the non-magnetic environment at multiple strokes; And, in each magnetic environment, the detection device obtains the second position parameter of the voice coil motor in each magnetic environment, wherein the second position parameter in each magnetic environment includes the position parameters of the voice coil motor in each magnetic environment under multiple strokes; And, the method further comprises: Determine the deviation between the second position parameter and the first position parameter in the plurality of magnetic environments, wherein the deviation is used to characterize the magnetic interference characteristic of the voice coil motor.

12. The magnetic interference testing method according to claim 11, characterized in that: The detection device detects the position parameters of the voice coil motor during the operation of the voice coil motor, including: When the magnetic field construction device is in a first state, the detection device detects a first position parameter of the voice coil motor; When the magnetic field construction device is in the second state, the detection device detects a second position parameter of the voice coil motor; The magnetic flux of the magnetic field construction device in the first state is different from that of the magnetic field construction device in the second state.

13. The magnetic interference testing method according to claim 11, characterized in that: The position parameters include first position data and second position data; The detection device detects the position parameters of the voice coil motor during the operation of the voice coil motor, including: When the voice coil motor works along a first direction, the detection device detects the first position data of the voice coil motor; When the voice coil motor works along the second direction, the detection device detects the second position data of the voice coil motor; Wherein, the first direction and the second direction are located on the plane where the circumferential direction is located.

14. The magnetic interference testing method according to claim 11, characterized in that: The position parameters include third position data; The detection device detects the position parameters of the voice coil motor during the operation of the voice coil motor, including: When the voice coil motor works along the third direction, the detection device detects the third position data of the voice coil motor; Wherein, the third direction is perpendicular to the plane where the circumferential direction lies.

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