Speaker, detection method, device and electronic device

Abstract

The present application discloses a loudspeaker, a detection method, a device and an electronic device, belonging to the field of camera technology. The loudspeaker includes a voice coil, a loudspeaker bracket and a centering piece. The centering piece includes a plurality of cantilevers, an outer frame and a plurality of piezoresistive structures. The first end of each cantilever is connected to the voice coil through a piezoresistive structure, the second end of each cantilever is connected to the outer frame, and the outer frame is fixed to the loudspeaker bracket.

Description

Technical Field

[0001] This application belongs to the technical field of electronic devices, and particularly relates to a loudspeaker, a detection method, a device, and an electronic device. Background Art

[0002] With the popular application of True Wireless Stereo (TWS) earphones, users have higher and higher requirements for the experience of earphones.

[0003] Wireless earphones output to drive a loudspeaker to emit sound through the digital to analog converter (DAC) of a Bluetooth chip. The loudspeaker generally includes structures such as a diaphragm, a voice coil, an outer frame bracket, a magnetic conductive sheet, a magnet, a U cup, etc., and the diaphragm drives the voice coil to vibrate to emit sound. However, during the user's use, due to reasons such as dropping or long-term use, problems such as the offset of the voice coil will occur, resulting in a decline in the acoustic performance of the loudspeaker and affecting the user experience. Summary of the Invention

[0004] Embodiments of this application provide a loudspeaker, a detection method, a device, and an electronic device, which can solve the problem that the acoustic performance of the loudspeaker declines due to the offset of the voice coil.

[0005] In a first aspect, embodiments of this application provide a loudspeaker, including: a voice coil, a loudspeaker bracket, and a centering washer. The centering washer includes a plurality of cantilevers, an outer frame, and a plurality of pressure-variable structures.

[0006] The first end of each cantilever is connected to the voice coil through a pressure-variable structure, the second end of each cantilever is connected to the outer frame, and the outer frame is fixed to the loudspeaker bracket.

[0007] In a second aspect, embodiments of this application provide a detection method, which is applied to the loudspeaker in the first aspect. The detection method includes:

[0008] Detecting the offset amount of the voice coil of the loudspeaker through the pressure-variable structure of the loudspeaker;

[0009] According to the offset amount of the voice coil, controlling the pressure-variable structure to calibrate the voice coil.

[0010] In a third aspect, embodiments of this application provide a detection device, including the loudspeaker in the first aspect. The detection device further includes:

[0011] A detection module, configured to detect the offset amount of the voice coil of the loudspeaker through the pressure-variable structure of the loudspeaker;

[0012] A calibration module, configured to control the pressure-variable structure to calibrate the voice coil according to the offset amount of the voice coil.

[0013] In a fourth aspect, an embodiment of the present application provides an electronic device, which includes a processor, a memory, and a program or instruction stored on the memory and executable on the processor. When the program or instruction is executed by the processor, the steps of the method described in the second aspect are implemented.

[0014] In a fifth aspect, an embodiment of the present application provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the method described in the second aspect are implemented.

[0015] In a sixth aspect, an embodiment of the present application provides a chip, which includes a processor and a communication interface. The communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the method described in the second aspect.

[0016] In a seventh aspect, an embodiment of the present application provides a computer program product / program product, which is stored in a non-transitory storage medium. The computer program / program product is executed by at least one processor to implement the steps of the method described in the second aspect.

[0017] In the embodiment of the present application, the speaker includes a voice coil, a speaker bracket, and a centering washer. The centering washer includes a plurality of cantilevers, an outer frame, and a plurality of piezoresistive structures. The first end of each cantilever is connected to the voice coil through a piezoresistive structure, and the second end of each cantilever is connected to the outer frame. The outer frame is fixed to the speaker bracket. The speaker provided by the embodiment of the present application fixes the voice coil in the speaker to the outer frame through the plurality of cantilevers of the centering washer to determine the initial position of the voice coil. The piezoresistive structure connected between the cantilever and the voice coil can be used to detect whether the voice coil has a displacement, and the position of the voice coil can be calibrated according to the displacement to avoid the voice coil from shifting and affecting the sound quality of the speaker. Description of the Drawings

[0018] Figure 1 is a schematic structural diagram of a speaker provided by an embodiment of the present application;

[0019] Figure 2 is a flowchart of a detection method provided by an embodiment of the present application;

[0020] Figure 3 is a block diagram of a detection device provided by an embodiment of the present application;

[0021] Figure 4 is a schematic diagram of an electronic device provided by an embodiment of the present application;

[0022] Figure 5It is a schematic diagram of the hardware structure of an electronic device provided by an embodiment of the present application.

[0023] Among them,

[0024] 10 - Cantilever;

[0025] 20 - Outer frame;

[0026] 30 - Pressure - variable structure; 31 - Strain gauge; 32 - Piezoelectric sheet;

[0027] 40 - Voice coil. Specific embodiments

[0028] Next, the technical solutions in the embodiments of the present application will be clearly described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present application.

[0029] The terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of the present application can be implemented in an order different from those illustrated or described here. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / " generally indicates an "or" relationship between the associated objects before and after.

[0030] Next, in conjunction with the attached Figures 1-5 , a loudspeaker, a detection method, a device, and an electronic device provided by an embodiment of the present application will be described in detail through specific embodiments and their application scenarios.

[0031] As Figure 1 shown, an embodiment of the present application provides a loudspeaker. As Figure 1 shown, the loudspeaker includes a voice coil 40, a loudspeaker bracket, and a centering washer. The centering washer includes a plurality of cantilevers 10, an outer frame 20, and a plurality of pressure - variable structures 30.

[0032] Among them, the first end of each cantilever 10 is connected to the voice coil 40 through a pressure - variable structure 30, the second end of each cantilever 10 is connected to the outer frame 20, and the outer frame 20 is fixed to the loudspeaker bracket.

[0033] Among them, the pressure - variable structure 30 is used to detect the offset of the voice coil 40 and calibrate the position of the voice coil 40.

[0034] That is to say, the centering support piece provided by the present application can be connected to the voice coil 40 in the speaker to detect whether the voice coil 40 has a displacement, and the voice coil 40 can be calibrated according to the displacement, so as to avoid the decline of the acoustic performance of the speaker caused by the offset of the voice coil 40.

[0035] Wherein, the number of the cantilevers 10 and the piezoresistive structures 30 can both be multiple, such as three, four or more, as long as the displacement of the voice coil 40 can be detected. Figure 1 Taking four cantilevers 10 and four piezoresistive structures 30 as an example, that is, four cantilevers 10 and four piezoresistive structures 30 on the up, down, left and right.

[0036] Specifically, the voice coil 40 can be fixed to the outer frame 20 through multiple cantilevers 10 to determine the initial position of the voice coil 40, and then the offset of the voice coil 40 can be detected through multiple piezoresistive structures 30. For example, Figure 1 Based on the orientation in, if the voice coil 40 is stressed and generates a lateral displacement, the piezoresistive structures 30 on the left and the right in the figure will both detect that the parameters have changed; if the voice coil 40 is stressed and generates a longitudinal displacement, the piezoresistive structures 30 on the upper and lower sides in the figure will both detect that the parameters have changed. After detecting that the voice coil 40 generates a displacement, the offset of the voice coil 40 can be calibrated through the piezoresistive structure 30 to make it return to the initial position.

[0037] It should be noted that the centering support piece can be composed of a flexible printed circuit board (FPC), and its shape can be circular as shown in FIG. 1, or square, polygonal, etc. The embodiments of the present application do not make specific limitations and can be determined according to the shape of the speaker bracket in actual applications to facilitate fixing to the speaker bracket. The voice coil 40 can be connected to the piezoresistive structure 30 by means of flexible glue, etc. and fixed at a specific position of the speaker, and this position is the initial position of the voice coil 40. If the voice coil 40 is stressed and deviates from this initial position, it means that the voice coil 40 has an offset and needs to be calibrated.

[0038] In the embodiments of the present application, the speaker includes a voice coil 40, a speaker bracket and a centering support piece. The centering support piece includes multiple cantilevers 10, an outer frame 20 and multiple piezoresistive structures 30. The first end of each cantilever 10 is connected to the voice coil 40 through a piezoresistive structure 30, and the second end of each cantilever 10 is connected to the outer frame 20, and the outer frame 20 is fixed to the speaker bracket. The speaker provided by the embodiments of the present application fixes the voice coil 40 in the speaker to the outer frame 20 through multiple cantilevers 10 of the centering support piece to determine the initial position of the voice coil 40, and can detect whether the voice coil 40 has a displacement through the piezoresistive structure 30 connected between the cantilever 10 and the voice coil 40, and calibrate the position of the voice coil 40 according to the displacement, so as to avoid the offset of the voice coil 40 and affect the sound quality of the speaker.

[0039] In a possible implementation manner of the present application, the pressure-variable structure 30 includes a strain gauge 31 and a piezoelectric sheet 32. The first end of each cantilever 10 is connected to the voice coil 40 through the strain gauge 31 and the piezoelectric sheet 32.

[0040] Among them, the strain gauge 31 is used to detect the offset of the voice coil 40, and the piezoelectric sheet 32 is used to calibrate the position of the voice coil 40.

[0041] That is to say, it is possible to detect whether the voice coil 40 is offset through the strain gauge 31 and the piezoelectric sheet 32, and calibrate the position of the voice coil 40 according to the offset.

[0042] In other implementation manners, it is also possible to detect the offset of the voice coil 40 through other sensor detection elements with light weight and small volume, and it is also possible to calibrate the position of the voice coil 40 through other deformable elements. The specific structure is not limited in this application and shall be subject to actual applications.

[0043] In a possible implementation manner of the present application, the number of piezoelectric sheets 32 is twice the number of strain gauges 31, and a piezoelectric sheet 32 is provided on both sides of each strain gauge 31.

[0044] That is to say, the pressure-variable structure 30 between each cantilever 10 and the voice coil 40 can be composed of one strain gauge 31 and two piezoelectric sheets 32. The strain gauge 31 is arranged in the middle of the cantilever 10, and the piezoelectric sheets 32 are arranged on both sides of the strain gauge 31. When the strain gauge 31 detects that the voice coil 40 is offset, the voice coil 40 can be calibrated through the two piezoelectric sheets 32, which can make the calibration more accurate.

[0045] In other implementation manners, multiple strain gauges 31 and multiple piezoelectric sheets 32 can be provided on one cantilever 10 to further improve the detection ability and calibration accuracy. However, considering volume limitations and weight limitations, a structure with one strain gauge 31 and two piezoelectric sheets 32 provided on one cantilever 10 can be adopted.

[0046] The embodiment of the present application also provides a detection method, as Figure 2 shown. This detection method is applied to the loudspeaker provided in the above embodiment, and this detection method may include the content shown in S201 to S202.

[0047] In S201, the offset of the voice coil of the loudspeaker is detected through the pressure-variable structure of the loudspeaker.

[0048] Among them, the offset of the voice coil is the offset relative to the initial state of the voice coil.

[0049] In S202, according to the offset of the voice coil, the pressure-variable structure is controlled to calibrate the voice coil.

[0050] In an embodiment of the present application, first, the offset of the voice coil of the speaker is detected through the pressure-variable structure of the speaker, and then, according to the offset of the voice coil, the pressure-variable structure is controlled to calibrate the voice coil. In the embodiment of the present application, the pressure-variable structure can detect whether the voice coil is offset, and calibrate the position of the voice coil according to the offset amount, so as to avoid the offset of the voice coil and affect the sound quality of the speaker.

[0051] In a possible implementation manner of the present application, detecting the offset of the voice coil of the speaker through the pressure-variable structure of the speaker may include the following steps.

[0052] Step 1: Detect the parameters of the strain gauges in the pressure-variable structure of the speaker.

[0053] That is to say, when the voice coil is stressed and generates displacement, the electrical parameters such as the impedance of the strain gauges in the pressure-variable structure of the speaker will change. When it is detected that the parameters of the strain gauges change, it indicates that the voice coil generates displacement, and the next step can be carried out to further detect which strain gauges' parameters change, and then determine the displacement of the voice coil.

[0054] Step 2: Determine the displacement of the strain gauges according to the positions of the strain gauges whose parameters change and the change amount of the parameters.

[0055] In this embodiment, if it is detected that the electrical parameters such as the impedance of the upper strain gauge and the lower strain gauge change, it indicates that the voice coil generates a longitudinal displacement (taking the attached Figure 1 orientation as an example), and then according to the relative change amount of the impedance of the upper and lower strain gauges, the displacement of the strain gauges can be determined, such as moving upward or downward equally.

[0056] Specifically, the relative change amount of the resistance of the strain gauges can be determined by the following formula:

[0057] ΔR / R = K * ε

[0058] Where, ΔR / R is the relative change amount of the resistance of the metal resistance strain gauge; K is the strain sensitivity coefficient; ε is the axial strain displacement of the metal material.

[0059] After determining the relative change amount of the resistance of the strain gauges, the output voltage U can be determined. For example, a bridge circuit, such as a differential full-bridge circuit, can be used. The stress directions of the strain gauges on the opposite two bridge arms are opposite, and the output voltage is shown in the following formula:

[0060] U = E * ΔR / R

[0061] Where, E is the DC power supply of the bridge circuit, and ΔR / R is the relative change amount of the resistance of the metal resistance strain gauge.

[0062] After the output voltage is subjected to electrical signal modulation processing such as amplification, filtering, and analog-to-digital conversion, the main controller can calculate the displacement generated by the strain gauge. Among them, the above electrical signal modulation processing can be performed by corresponding devices or circuits, such as an instrumentation amplifier circuit, a narrowband pass filter, an integrating analog-to-digital conversion circuit, etc. for amplification, filtering, and analog-to-digital conversion. Other circuits or devices can also be used, and the present application does not make specific limitations.

[0063] Step 3: Determine the offset of the voice coil of the speaker according to the displacement of the strain gauge.

[0064] After determining the displacement of the strain gauge, the offset of the voice coil of the speaker can be determined as follows:

[0065] ΔS2 = k * ΔS1

[0066] Where, ΔS2 is the offset of the voice coil of the speaker; ΔS1 is the displacement of the strain gauge; k is the relative displacement coefficient.

[0067] In a possible implementation manner of the present application, controlling the piezostructure to calibrate the voice coil according to the offset of the voice coil may include the following steps.

[0068] Step 1: Determine the calibration displacement of the voice coil according to the offset of the voice coil.

[0069] That is to say, the calibration displacement of the voice coil can be determined according to the offset of the voice coil, that is, the inverse number of the displacement of the voice coil -ΔS2.

[0070] Step 2: Control the piezoelectric sheet in the piezostructure to deform to calibrate the voice coil according to the calibration displacement.

[0071] In this embodiment, the position that the actual voice coil needs to be calibrated is -ΔS2, as shown in the following formula:

[0072] -ΔS2 = (A * D) / (C * E)

[0073] Where, D is the electric displacement intensity, E is the electric field intensity, A is the effective area of the piezoelectric sheet, and C is the capacitance parameter of the piezoelectric sheet.

[0074] According to the above formula, the piezoelectric sheet can be deformed accordingly, and then the voice coil can be calibrated to make it return to the initial position.

[0075] In the embodiment of the present application, it can automatically detect the offset of the voice coil of the speaker and achieve position calibration by controlling the piezoelectric sheet, ensuring that the voice coil can be in the initial position in any case, avoiding abnormal sounds caused by the offset of the voice coil, and improving the user experience.

[0076] Such as Figure 3As shown in the figure, an embodiment of the present application further provides a detection device, which may include the centering support piece provided in the above embodiment, and the detection device may further include: a detection module 301 and a calibration module 302.

[0077] Among them, the detection module 301 is configured to detect the offset of the voice coil of the speaker through the pressure-variable structure of the speaker; the calibration module 302 is configured to control the pressure-variable structure to calibrate the voice coil according to the offset of the voice coil.

[0078] In the embodiment of the present application, first, the detection module 301 detects the offset of the voice coil of the speaker through the pressure-variable structure of the speaker, and then the calibration module 302 controls the pressure-variable structure to calibrate the voice coil according to the offset of the voice coil. The embodiment of the present application can detect whether the voice coil is offset through the pressure-variable structure and calibrate the position of the voice coil according to the offset amount, so as to avoid the voice coil from being offset and affecting the sound quality of the speaker.

[0079] In a possible implementation manner of the present application, the detection module 301 is configured to: detect the parameters of the strain gauges in the pressure-variable structure of the speaker; determine the displacement of the strain gauges according to the position and the change amount of the parameters of the strain gauges whose parameters change; and determine the offset of the voice coil of the speaker according to the displacement of the strain gauges.

[0080] In a possible implementation manner of the present application, the calibration module 302 is configured to: determine the calibration displacement of the voice coil according to the offset of the voice coil; and control the piezoelectric sheet in the pressure-variable structure to deform to calibrate the voice coil according to the calibration displacement.

[0081] The detection device in the embodiment of the present application may be a device, or a component, an integrated circuit, or a chip in a terminal. The device may be a mobile electronic device or a non-mobile electronic device. Exemplarily, the mobile electronic device may be a mobile phone, a tablet computer, a laptop computer, a handheld computer, a vehicle-mounted electronic device, a wearable device, an ultra-mobile personal computer (UMPC), a netbook, or a personal digital assistant (PDA), etc., and the non-mobile electronic device may be a server, a Network Attached Storage (NAS), a personal computer (PC), a television (TV), a teller machine, or a self-service machine, etc. The embodiment of the present application does not make a specific limitation.

[0082] The detection device in the embodiments of the present application can be a device with an operating system. The operating system can be the Android operating system, the iOS operating system, or other possible operating systems, which are not specifically limited in the embodiments of the present application.

[0083] The detection device provided by the embodiments of the present application can implement Figure 2 each process implemented by the method embodiments, achieving the same technical effects. To avoid repetition, details are not described herein again.

[0084] Optionally, as Figure 4 shown, the embodiments of the present application further provide an electronic device 400, including a processor 401, a memory 402, a program or instruction stored on the memory 402 and executable on the processor 401. When the program or instruction is executed by the processor 401, it implements each process of the above-mentioned detection method embodiments and can achieve the same technical effects. To avoid repetition, details are not described herein again.

[0085] It should be noted that the electronic devices in the embodiments of the present application include the above-mentioned mobile electronic devices and non-mobile electronic devices.

[0086] Figure 5 A schematic diagram of the hardware structure of an electronic device for implementing various embodiments of the present application

[0087] The electronic device 500 includes, but is not limited to: a radio frequency unit 501, a network module 502, an audio output unit 503, an input unit 504, a sensor 505, a display unit 506, a user input unit 507, an interface unit 508, a memory 509, and a processor 510, etc.

[0088] Those skilled in the art can understand that the electronic device 500 may further include a power source (such as a battery) for supplying power to each component. The power source can be logically connected to the processor 510 through a power management system, so as to implement functions such as management of charging, discharging, and power consumption management through the power management system. Figure 5 The structure of the electronic device shown in

[0089] does not constitute a limitation on the electronic device. The electronic device may include more or fewer components than shown, or combine certain components, or have different component arrangements, which are not described herein again.

[0090] In the embodiments of the present application, first, the offset of the voice coil of the speaker is detected through the pressure-variable structure of the speaker, and then, based on the offset of the voice coil, the pressure-variable structure is controlled to calibrate the voice coil. The embodiments of the present application can detect whether the voice coil is offset through the pressure-variable structure and calibrate the position of the voice coil according to the offset amount, so as to avoid the offset of the voice coil and affect the sound quality of the speaker.

[0091] In a possible implementation manner of the present application, the processor 510 is configured to detect the parameters of the strain gauges in the pressure-variable structure of the speaker; determine the displacement of the strain gauges according to the positions and the change amounts of the parameters of the strain gauges whose parameters have changed; and determine the offset amount of the voice coil of the speaker according to the displacement of the strain gauges.

[0092] In a possible implementation manner of the present application, the processor 510 is configured to determine the calibration displacement of the voice coil according to the offset amount of the voice coil; and control the piezoelectric sheet in the pressure-variable structure to deform to calibrate the voice coil according to the calibration displacement.

[0093] The technical effects of the above embodiments have been described in detail in the embodiments of the above detection method. To avoid repetition, they will not be elaborated here.

[0094] It should be understood that in the embodiments of the present application, the input unit 504 may include a Graphics Processing Unit (GPU) 5041 and a microphone 5042. The graphics processor 5041 processes the image data of static pictures or videos obtained by an image capturing device (such as a camera) in the video capture mode or the image capture mode. The display unit 506 may include a display panel 5061, and the display panel 5061 may be configured in the form of a liquid crystal display, an organic light-emitting diode, etc. The user input unit 507 includes a touch panel 5071 and other input devices 5072. The touch panel 5071 is also called a touch screen. The touch panel 5071 may include two parts: a touch detection device and a touch controller. The other input devices 5072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which will not be elaborated here. The memory 509 may be used to store software programs and various data, including but not limited to application programs and operating systems. The processor 510 may integrate an application processor and a modem processor. Among them, the application processor mainly processes the operating system, user interface, application programs, etc., and the modem processor mainly processes wireless communication. It can be understood that the above modem processor may not be integrated into the processor 510.

[0095] The embodiments of the present application further provide a readable storage medium, on which a program or instructions are stored. When the program or instructions are executed by a processor, each process of the detection method embodiment provided in any of the above embodiments is implemented, and the same technical effects can be achieved. To avoid repetition, details are not described herein again.

[0096] Wherein, the processor is the processor in the electronic device described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disks, or optical discs, etc.

[0097] The embodiments of the present application further provide a chip, which includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is configured to run a program or instructions to implement each process of the detection method embodiment described above, and the same technical effects can be achieved. To avoid repetition, details are not described herein again.

[0098] It should be understood that the chip mentioned in the embodiments of the present application may also be referred to as a system-on-chip, system chip, chip system, or system-on-chip, etc.

[0099] The embodiments of the present application further provide a computer program product, which is stored in a non-transitory storage medium. When the computer program product is executed by the processor, each process of the detection method embodiment described above is implemented, and the same technical effects can be achieved. To avoid repetition, details are not described herein again.

[0100] The embodiments of the present application further provide a processing device, which is configured to execute each process of the detection method embodiment described above, and the same technical effects can be achieved. To avoid repetition, details are not described herein again.

[0101] It should be noted that in this article, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without more limitations, an element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article or device including that element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in a reverse order according to the functions involved. For example, the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. Additionally, the features described with reference to certain examples may be combined in other examples.

[0102] Through the description of the above embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus a necessary general hardware platform. Of course, it can also be implemented by hardware, but in many cases the former is a better implementation. Based on such an understanding, the technical solution of the present application, in essence or the part that contributes to the prior art, can be embodied in the form of a computer software product. The computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to enable a terminal (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in various embodiments of the present application.

[0103] The embodiments of the present application have been described above in conjunction with the accompanying drawings. However, the present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all of them fall within the protection scope of the present application.

Claims

1. A loudspeaker, characterized in that, Comprising: A voice coil, a speaker bracket, and a centering spider. The centering spider includes a plurality of cantilevers, an outer frame, and a plurality of piezoresistive structures. The first end of each of the cantilevers is connected to the voice coil through a piezoresistive structure, the second end of each of the cantilevers is connected to the outer frame, and the outer frame is fixed to the speaker bracket. The piezoresistive structure is used to detect the displacement of the voice coil and calibrate the position of the voice coil according to the displacement.

2. The loudspeaker according to claim 1, wherein The piezoresistive structure includes a strain gauge and a piezoelectric sheet. The first end of each of the cantilevers is connected to the voice coil through the strain gauge and the piezoelectric sheet.

3. The loudspeaker according to claim 2, characterized in that, The number of the piezoelectric sheets is twice the number of the strain gauges, and one piezoelectric sheet is arranged on each side of each of the strain gauges.

4. The loudspeaker according to claim 2, wherein The strain gauge is used to detect the offset of the voice coil, and the piezoelectric sheet is used to calibrate the position of the voice coil.

5. A detection method, applied to the loudspeaker according to any one of claims 1-4, characterized in that, The detection method includes: Detecting the offset of the voice coil of the speaker through the piezoresistive structure of the speaker; Controlling the piezoresistive structure to calibrate the voice coil according to the offset of the voice coil.

6. The detection method according to claim 5, characterized in that The detecting the offset of the voice coil of the speaker through the piezoresistive structure of the speaker includes: Detecting the parameters of the strain gauges in the piezoresistive structure of the speaker; Determining the displacement of the strain gauge according to the position of the strain gauge whose parameters change and the change amount of the parameters; Determining the offset of the voice coil of the speaker according to the displacement of the strain gauge.

7. The detection method according to claim 5, characterized in that, The controlling the piezoresistive structure to calibrate the voice coil according to the offset of the voice coil includes: Determining the calibration displacement of the voice coil according to the offset of the voice coil; Controlling the piezoelectric sheet in the piezoresistive structure to deform to calibrate the voice coil according to the calibration displacement.

8. A detection device, characterized in that, Including the speaker according to any one of claims 1-4, the detection device further includes: A detection module, configured to detect the offset of the voice coil of the speaker through the piezoresistive structure of the speaker; A calibration module, configured to control the piezoresistive structure to calibrate the voice coil according to the offset of the voice coil.

9. The detection device according to claim 8, characterized in that, The detection module is configured to: Detect the parameters of the strain gauges in the piezoresistive structure of the speaker; Determine the displacement of the strain gauge according to the position of the strain gauge whose parameters change and the change amount of the parameters; Determine the offset of the voice coil of the speaker according to the displacement of the strain gauge.

10. The detection device according to claim 8, characterized in that The calibration module is configured to: Determine the calibration displacement of the voice coil according to the offset of the voice coil; Control the piezoelectric sheet in the piezoresistive structure to deform to calibrate the voice coil according to the calibration displacement.

11. An electronic device, characterized in that, The electronic device includes a processor, a memory, and a program or instruction stored in the memory and executable on the processor. When the program or instruction is executed by the processor, the steps of the method according to any one of claims 5-7 are implemented.

Images