CN115460528A - Measuring method and measuring device for performance parameters of vibrating diaphragm and readable storage medium - Google Patents
Measuring method and measuring device for performance parameters of vibrating diaphragm and readable storage medium Download PDFInfo
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- CN115460528A CN115460528A CN202211065431.7A CN202211065431A CN115460528A CN 115460528 A CN115460528 A CN 115460528A CN 202211065431 A CN202211065431 A CN 202211065431A CN 115460528 A CN115460528 A CN 115460528A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R29/00—Monitoring arrangements; Testing arrangements
Abstract
The disclosure provides a measuring method, a measuring device and a readable storage medium for performance parameters of a diaphragm, wherein the measuring method comprises the following steps: outputting an excitation signal to drive the audio transducer to work; the audio transducer is provided with a vibrating diaphragm to be tested, and the vibrating diaphragm vibrates when the audio transducer works; obtaining the vibration displacement of the vibrating diaphragm; measuring performance parameters of the diaphragm according to the excitation signal and the vibration displacement; wherein the performance parameter is a parameter representing a performance of the diaphragm.
Description
Technical Field
The present disclosure relates to the field of audio transducer measurement technologies, and in particular, to a method and an apparatus for measuring a performance parameter of a diaphragm, and a readable storage medium.
Background
An audio transducer such as a loudspeaker is an acoustic device that produces sound through sound-electricity conversion, and has a wide variety of applications. The performance and quality of an audio transducer depends for the most part on the quality of the individual components. Therefore, it is desirable to measure performance parameters of individual components prior to assembly while reducing costs.
In the prior art, electrodynamic audio transducers are commonly used. Electrodynamic audio transducers usually comprise a vibration system, which comprises a diaphragm whose properties are related to the performance of the audio transducer, and a magnetic circuit system.
Therefore, it is valuable to provide a solution capable of accurately measuring the performance parameters of the diaphragm.
Disclosure of Invention
An object of the present disclosure is to provide a new technical solution for measuring a performance parameter of a diaphragm.
According to a first aspect of the present disclosure, there is provided a method for measuring a performance parameter of a diaphragm, including:
outputting an excitation signal to drive the audio transducer to work; the audio transducer is provided with a vibrating diaphragm to be tested, and the vibrating diaphragm vibrates when the audio transducer works;
obtaining the vibration displacement of the vibrating diaphragm;
measuring performance parameters of the diaphragm according to the excitation signal and the vibration displacement;
wherein the performance parameter is a parameter representing a performance of the diaphragm.
Optionally, the measuring the performance parameter of the diaphragm according to the excitation signal and the vibration displacement includes:
acquiring a frequency spectrum of a voltage of the excitation signal;
acquiring a frequency spectrum of the speed of the diaphragm according to the vibration displacement;
constructing a transfer function of the frequency spectrum of the velocity to the frequency spectrum of the voltage;
and obtaining the performance parameters of the diaphragm according to the transfer function and the mass of the diaphragm.
Optionally, the obtaining a frequency spectrum of the speed of the diaphragm according to the vibration displacement includes:
determining the vibration speed of the diaphragm according to the vibration displacement;
and carrying out Fourier transform on the vibration speed to obtain a frequency spectrum of the speed.
Optionally, the performance parameter comprises a stiffness coefficient,
obtaining the performance parameter of the diaphragm according to the transfer function and the mass of the diaphragm, wherein the obtaining of the performance parameter of the diaphragm comprises:
determining the resonant frequency of the diaphragm according to the transfer function;
and obtaining the stiffness coefficient of the diaphragm according to the resonance frequency and the mass of the diaphragm.
Optionally, the performance parameter includes a figure of merit,
obtaining the performance parameter of the diaphragm according to the transfer function and the mass of the diaphragm, wherein the obtaining of the performance parameter of the diaphragm comprises:
determining the resonant frequency of the diaphragm according to the transfer function;
determining a first frequency and a second frequency according to the transfer function, wherein the values of the transfer function corresponding to the first frequency and the second frequency are equal to the set multiple of the value of the transfer function corresponding to the resonance frequency;
and obtaining the quality factor of the diaphragm according to the resonance frequency, the first frequency and the second frequency.
Optionally, the performance parameter further comprises a mechanical resistance,
obtaining the performance parameter of the diaphragm according to the transfer function and the mass of the diaphragm, wherein the obtaining of the performance parameter of the diaphragm comprises:
and obtaining the mechanical resistance of the vibrating diaphragm according to the resonance frequency, the mass of the vibrating diaphragm and the quality factor of the vibrating diaphragm.
Optionally, the excitation signal is a logarithmic swept frequency signal.
According to a second aspect of the present disclosure, there is provided a device for measuring a performance parameter of a diaphragm, including:
the driving module is used for outputting an excitation signal and driving the audio transducer to work; the audio transducer is provided with a vibrating diaphragm to be tested, and the vibrating diaphragm vibrates when the audio transducer works;
the displacement detection module is used for acquiring the vibration displacement of the vibrating diaphragm;
the parameter measuring module is used for measuring the performance parameters of the vibrating diaphragm according to the excitation signal and the vibration displacement;
wherein the performance parameter is a parameter representing a performance of the diaphragm.
According to a third aspect of the present disclosure, there is provided a device for measuring a performance parameter of a diaphragm, including:
a processor and a memory for storing instructions for controlling the processor to perform the method according to the first aspect of the present disclosure.
According to a fourth aspect of the present disclosure, there is provided a readable storage medium having stored thereon a computer program which, when executed by a processor, implements the method according to the first aspect of the present disclosure.
Through the embodiment of the disclosure, the performance parameters of the diaphragm are measured according to the excitation signal and the displacement of the vibration, so that the measurement process can be simplified, the measurement cost is reduced, and the measurement efficiency and the measurement precision are improved. In addition, the diaphragm meeting the specification of the audio transducer is selected by measuring the performance parameters of the diaphragm, so that the qualified rate of the finished audio transducer can be improved.
Other features of the present disclosure and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the disclosure and together with the description, serve to explain the principles of the disclosure.
Fig. 1 shows a flowchart of a method for measuring a performance parameter of a diaphragm according to an embodiment of the present disclosure.
Fig. 2 is a schematic diagram illustrating an application scenario of a method for measuring a performance parameter of a diaphragm according to an embodiment of the present disclosure.
Fig. 3 shows a block diagram of a device for measuring a performance parameter of a diaphragm according to a first embodiment of the disclosure.
Fig. 4 shows a block diagram of a measuring device for a performance parameter of a diaphragm according to a second embodiment of the present disclosure.
Detailed Description
Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present disclosure unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the disclosure, its application, or uses.
Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Fig. 1 is a flowchart of a method for measuring a performance parameter of a diaphragm according to an embodiment of the disclosure. The measuring method may be implemented by a measuring device of a performance parameter of the diaphragm.
As shown in fig. 1, the method may include steps S1100 to S1300 as follows:
step S1100, outputting an excitation signal to drive an audio transducer to work; the audio transducer is provided with a vibrating diaphragm to be tested, and the vibrating diaphragm vibrates when the audio transducer works.
In an embodiment of the present disclosure, as shown in fig. 2, a diaphragm 2100 to be tested may be disposed on an audio transducer 2300 through a fixing fixture 2200, and an open cavity 2400 may be formed between the diaphragm 2100, the fixing fixture 2200 and the audio transducer 2300. When the audio transducer is in operation, the diaphragm thereon may be caused to vibrate.
The excitation signal in this embodiment may be a logarithmic frequency sweep signal, for example, an excitation single frequency sweep within 1s may be set.
Step S1200, obtaining a vibration displacement of the diaphragm.
In one embodiment of the present disclosure, the measuring apparatus may include a displacement detecting module for detecting a vibration displacement of the diaphragm.
In one example, the displacement detection module may be a laser displacement sensor.
And step 1300, measuring the performance parameters of the diaphragm according to the excitation signal and the vibration displacement.
Wherein the performance parameter is a parameter indicative of a performance of the diaphragm.
In one embodiment of the present disclosure, measuring the performance parameter of the diaphragm according to the excitation signal and the vibration displacement may include steps S1310 to S1340 as follows:
in step S1310, a spectrum of the voltage of the excitation signal is acquired.
In this embodiment, the voltage of the excitation signal may be fourier-transformed to obtain a frequency spectrum of the voltage of the excitation signal.
Step S1320, obtaining a frequency spectrum of the velocity of the diaphragm according to the vibration displacement.
In one embodiment of the present disclosure, obtaining a frequency spectrum of a velocity of the diaphragm according to the vibration displacement may include: determining the vibration speed of the vibrating diaphragm according to the vibration displacement; and carrying out Fourier transform on the vibration speed to obtain the frequency spectrum of the speed of the vibrating diaphragm.
In step S1330, a spectrum of velocity to spectrum of voltage transfer function is constructed.
In this embodiment, the transfer function of the spectrum V of the velocity to the spectrum U of the voltage can be expressed as: h = V/U.
And S1340, obtaining the performance parameters of the diaphragm according to the transfer function and the mass of the diaphragm.
In one embodiment of the present disclosure, the performance parameter may include a stiffness coefficient. Then, obtaining the performance parameter of the diaphragm according to the transfer function and the mass of the diaphragm may include: determining the resonance frequency of the diaphragm according to the transfer function; and obtaining the stiffness coefficient of the diaphragm according to the resonance frequency and the mass of the diaphragm.
In this embodiment, a transfer function curve may be constructed, and a frequency corresponding to a highest point of the transfer function curve is determined, that is, a resonant frequency of the diaphragm.
The mass of the diaphragm may be obtained by measuring the diaphragm in advance through an electronic scale, or may be set by a user measuring performance parameters of the diaphragm according to an actual situation, which is not limited herein.
In one embodiment, the stiffness coefficient of the diaphragm may be obtained by the following formula:
wherein k is the stiffness coefficient of the diaphragm, f 0 Is the resonance frequency of the diaphragm, and m is the mass of the diaphragm.
In one embodiment of the present disclosure, the performance parameter may include a figure of merit. Then, obtaining a performance parameter of the diaphragm according to the transfer function and the mass of the diaphragm may include: determining the resonance frequency of the diaphragm according to the transfer function; determining a first frequency and a second frequency according to the transfer function, wherein the values of the transfer function corresponding to the first frequency and the second frequency are equal to the set multiple of the value of the transfer function corresponding to the resonant frequency; and obtaining the quality factor of the diaphragm according to the resonance frequency, the first frequency and the second frequency.
In this embodiment, the first frequency may correspond to the value of the transfer function H1, the second frequency may correspond to the value of the transfer function H2, the resonant frequency may correspond to the value of the transfer function H0, and H1= H2= a × H0. Where a is a set multiple, and may be set according to the physical meaning of the quality parameter, and may be 70.7%, for example.
In one embodiment, the second frequency is greater than the first frequency, and then the quality factor of the diaphragm can be obtained by the following formula:
wherein Q is the quality factor of the diaphragmNumber f 0 Is the resonant frequency of the diaphragm, f 2 Is the second frequency, f 1 Is a first frequency.
In one embodiment of the present disclosure, the performance parameter may also include a force resistance. Then, obtaining the performance parameter of the diaphragm according to the transfer function and the mass of the diaphragm may include: and obtaining the force resistance of the vibrating diaphragm according to the resonance frequency of the vibrating diaphragm, the mass of the vibrating diaphragm and the quality factor of the vibrating diaphragm.
In one embodiment, the equation of vibration of the suspension system of the audio transducer may be obtained, and the mechanical resistance of the diaphragm may be specifically expressed as:
wherein R is the mechanical resistance of the diaphragm, Q is the quality factor of the diaphragm, f 0 Is the resonant frequency of the diaphragm, and m is the mass of the diaphragm.
Since the diaphragm is a damped forced vibration system, the vibration differential equation can be expressed by ignoring some nonlinear factors:
wherein F is the force applied to the diaphragm during vibration, t is time, ω is angular frequency, x is the displacement of the diaphragm, ω is 0 Is the natural resonant frequency of the diaphragm.
The velocity resonance condition can be expressed as:
where m is the mass of the diaphragm, k is the stiffness coefficient of the diaphragm, ω is the angular frequency, ω is 0 Is the natural resonant frequency of the diaphragm.
The displacement resonance condition can be expressed as:
wherein R is the mechanical resistance of the diaphragm, m is the mass of the diaphragm, ω is the angular frequency, ω is 0 Is the natural resonant frequency of the diaphragm.
It can be derived from this that the resonance frequency of the velocity coincides with the natural resonance frequency of the diaphragm, so that the linear parameter measurement of the diaphragm is more accurate by the transfer function of the velocity to the voltage of the excitation signal.
Through the embodiment of the disclosure, the performance parameters of the diaphragm are measured according to the excitation signal and the displacement of the vibration, so that the measurement process can be simplified, the measurement cost is reduced, and the measurement efficiency and the measurement precision are improved. In addition, the performance parameters of the vibrating diaphragms are measured to select the vibrating diaphragms which accord with the specification of the audio transducer, so that the qualified rate of finished products of the audio transducer can be improved.
In an embodiment of the present disclosure, a qualified range of preset performance parameters may be obtained, and whether the performance parameters of the diaphragm obtained in step S1300 are within the qualified range is detected, and if yes, the diaphragm is determined to be qualified; if not, the diaphragm is judged to be unqualified.
Through the embodiment, whether the vibrating diaphragm is qualified or not can be judged according to the measured performance parameters of the vibrating diaphragm.
< apparatus embodiment >
In the present embodiment, a measuring device 3000 for measuring a performance parameter of a diaphragm is provided, as shown in fig. 3, the measuring device 3000 includes a driving module 3100, a displacement detecting module 3200 and a parameter measuring module 3300.
The driving module 3100 is used for outputting an excitation signal and driving the audio transducer to work; the audio transducer is provided with a vibrating diaphragm to be tested, and the vibrating diaphragm vibrates when the audio transducer works.
And the displacement detection module 3200 is used for acquiring the vibration displacement of the vibrating diaphragm.
And the parameter measuring module 3300 is used for measuring the performance parameter of the diaphragm according to the excitation signal and the vibration displacement.
Wherein the performance parameter is a parameter representing a performance of the diaphragm.
In one embodiment of the present disclosure, the parameter measurement module 3300 may be further configured to:
acquiring a frequency spectrum of a voltage of the excitation signal;
acquiring a frequency spectrum of the speed of the diaphragm according to the vibration displacement;
constructing a transfer function of the frequency spectrum of the velocity to the frequency spectrum of the voltage;
and obtaining the performance parameters of the diaphragm according to the transfer function and the mass of the diaphragm.
In an embodiment of the present disclosure, the obtaining a frequency spectrum of the velocity of the diaphragm according to the vibration displacement includes:
determining the vibration speed of the diaphragm according to the vibration displacement;
and carrying out Fourier transform on the vibration speed to obtain a frequency spectrum of the speed.
In one embodiment of the present disclosure, the performance parameter comprises a stiffness coefficient,
obtaining the performance parameter of the diaphragm according to the transfer function and the mass of the diaphragm, wherein the obtaining of the performance parameter of the diaphragm comprises:
determining the resonant frequency of the diaphragm according to the transfer function;
and obtaining the stiffness coefficient of the diaphragm according to the resonance frequency and the mass of the diaphragm.
In one embodiment of the present disclosure, the performance parameter includes a figure of merit,
obtaining the performance parameter of the diaphragm according to the transfer function and the mass of the diaphragm, including:
determining the resonant frequency of the diaphragm according to the transfer function;
determining a first frequency and a second frequency according to the transfer function, wherein the values of the first frequency and the second frequency corresponding to the transfer function are equal to the set multiple of the value of the resonance frequency corresponding to the transfer function;
and obtaining the quality factor of the diaphragm according to the resonance frequency, the first frequency and the second frequency.
In one embodiment of the present disclosure, the performance parameter further comprises a resistance to force,
obtaining the performance parameter of the diaphragm according to the transfer function and the mass of the diaphragm, wherein the obtaining of the performance parameter of the diaphragm comprises:
and obtaining the mechanical resistance of the vibrating diaphragm according to the resonance frequency, the mass of the vibrating diaphragm and the quality factor of the vibrating diaphragm.
In one embodiment of the present disclosure, the excitation signal is a logarithmic swept frequency signal.
In another embodiment, as shown in fig. 4, the measurement apparatus 3000 may further comprise a processor 3400 and a memory 3500, the memory 3500 being configured to store executable instructions; the instruction is used for controlling the processor 3400 to execute the above-mentioned measuring method of the performance parameter of the diaphragm.
< readable storage Medium embodiment >
In this embodiment, there is also provided a readable storage medium on which a computer program is stored, the computer program, when executed by a processor, implementing the method for measuring reliability of interference fit according to any embodiment of the present disclosure.
The present disclosure may be systems, methods, and/or computer program products. The computer program product may include a computer-readable storage medium having computer-readable program instructions embodied thereon for causing a processor to implement various aspects of the present disclosure.
The computer readable storage medium may be a tangible device that can hold and store the instructions for use by the instruction execution device. The computer readable storage medium may be, for example, but not limited to, an electronic memory device, a magnetic memory device, an optical memory device, an electromagnetic memory device, a semiconductor memory device, or any suitable combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a Static Random Access Memory (SRAM), a portable compact disc read-only memory (CD-ROM), a Digital Versatile Disc (DVD), a memory stick, a floppy disk, a mechanical coding device, such as a punch card or an in-groove protruding structure with instructions stored thereon, and any suitable combination of the foregoing. Computer-readable storage media as used herein is not to be construed as transitory signals per se, such as radio waves or other freely propagating electromagnetic waves, electromagnetic waves propagating through a waveguide or other transmission medium (e.g., optical pulses through a fiber optic cable), or electrical signals transmitted through electrical wires.
The computer-readable program instructions described herein may be downloaded from a computer-readable storage medium to a respective computing/processing device, or to an external computer or external storage device over a network, such as the internet, a local area network, a wide area network, and/or a wireless network. The network may include copper transmission cables, fiber optic transmission, wireless transmission, routers, firewalls, switches, gateway computers and/or edge servers. The network adapter card or network interface in each computing/processing device receives the computer-readable program instructions from the network and forwards the computer-readable program instructions for storage in a computer-readable storage medium in the respective computing/processing device.
Computer program instructions for carrying out operations of the present disclosure may be assembler instructions, instruction Set Architecture (ISA) instructions, machine-related instructions, microcode, firmware instructions, state setting data, or source or object code written in any combination of one or more programming languages, including an object oriented programming language such as Smalltalk, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The computer-readable program instructions may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the latter scenario, the remote computer may be connected to the user's computer through any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider). In some embodiments, the electronic circuitry that can execute the computer-readable program instructions implements aspects of the present disclosure by utilizing the state information of the computer-readable program instructions to personalize the electronic circuitry, such as a programmable logic circuit, a Field Programmable Gate Array (FPGA), or a Programmable Logic Array (PLA).
Various aspects of the present disclosure are described herein with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the disclosure. It will be understood that each block of the flowchart illustrations and/or block diagrams, and combinations of blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer-readable program instructions.
These computer-readable program instructions may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions/acts specified in the flowchart and/or block diagram block or blocks. These computer-readable program instructions may also be stored in a computer-readable storage medium that can direct a computer, programmable data processing apparatus, and/or other devices to function in a particular manner, such that the computer-readable medium storing the instructions comprises an article of manufacture including instructions which implement the function/act specified in the flowchart and/or block diagram block or blocks.
The computer readable program instructions may also be loaded onto a computer, other programmable data processing apparatus, or other devices to cause a series of operational steps to be performed on the computer, other programmable apparatus or other devices to produce a computer implemented process such that the instructions which execute on the computer, other programmable apparatus or other devices implement the functions/acts specified in the flowchart and/or block diagram block or blocks.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of instructions, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems that perform the specified functions or acts, or combinations of special purpose hardware and computer instructions. It is well known to those skilled in the art that implementation by hardware, by software, and by a combination of software and hardware are equivalent.
Having described embodiments of the present disclosure, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein. The scope of the present disclosure is defined by the appended claims.
Claims (10)
1. A method for measuring performance parameters of a diaphragm is characterized by comprising the following steps:
outputting an excitation signal to drive the audio transducer to work; a vibrating diaphragm to be tested is arranged on the audio transducer, and the vibrating diaphragm vibrates when the audio transducer works;
obtaining the vibration displacement of the vibrating diaphragm;
measuring performance parameters of the diaphragm according to the excitation signal and the vibration displacement;
wherein the performance parameter is a parameter representing a performance of the diaphragm.
2. The method of claim 1, wherein the measuring the performance parameter of the diaphragm based on the excitation signal and the vibrational displacement comprises:
acquiring a frequency spectrum of a voltage of the excitation signal;
acquiring a frequency spectrum of the speed of the diaphragm according to the vibration displacement;
constructing a transfer function of the frequency spectrum of the velocity to the frequency spectrum of the voltage;
and obtaining the performance parameters of the diaphragm according to the transfer function and the mass of the diaphragm.
3. The method of claim 2, wherein the obtaining a frequency spectrum of the velocity of the diaphragm according to the vibration displacement comprises:
determining the vibration speed of the diaphragm according to the vibration displacement;
and carrying out Fourier transform on the vibration speed to obtain a frequency spectrum of the speed.
4. The measurement method according to claim 2, wherein the performance parameter comprises a stiffness coefficient,
obtaining the performance parameter of the diaphragm according to the transfer function and the mass of the diaphragm, wherein the obtaining of the performance parameter of the diaphragm comprises:
determining the resonant frequency of the diaphragm according to the transfer function;
and obtaining the stiffness coefficient of the diaphragm according to the resonance frequency and the mass of the diaphragm.
5. The measurement method of claim 2, wherein the performance parameter comprises a figure of merit,
obtaining the performance parameter of the diaphragm according to the transfer function and the mass of the diaphragm, wherein the obtaining of the performance parameter of the diaphragm comprises:
determining the resonant frequency of the diaphragm according to the transfer function;
determining a first frequency and a second frequency according to the transfer function, wherein the values of the first frequency and the second frequency corresponding to the transfer function are equal to the set multiple of the value of the transfer function corresponding to the resonance frequency;
and obtaining the quality factor of the diaphragm according to the resonance frequency, the first frequency and the second frequency.
6. The measurement method of claim 5, wherein the performance parameter further comprises a force resistance,
obtaining the performance parameter of the diaphragm according to the transfer function and the mass of the diaphragm, including:
and obtaining the mechanical resistance of the vibrating diaphragm according to the resonance frequency, the mass of the vibrating diaphragm and the quality factor of the vibrating diaphragm.
7. The measurement method according to claim 1, wherein the excitation signal is a logarithmic swept frequency signal.
8. A device for measuring a performance parameter of a diaphragm, comprising:
the driving module is used for outputting an excitation signal and driving the audio transducer to work; a vibrating diaphragm to be tested is arranged on the audio transducer, and the vibrating diaphragm vibrates when the audio transducer works;
the displacement detection module is used for acquiring the vibration displacement of the vibrating diaphragm;
the parameter measuring module is used for measuring the performance parameters of the vibrating diaphragm according to the excitation signal and the vibration displacement;
wherein the performance parameter is a parameter representing a performance of the diaphragm.
9. A device for measuring a performance parameter of a diaphragm, comprising:
a processor and a memory for storing instructions for controlling the processor to perform the measurement method of any one of claims 1 to 7.
10. A readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the measurement method according to any one of claims 1 to 7.
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| CN117260023A (en) * | 2023-11-22 | 2023-12-22 | 海菲曼（天津）科技有限公司 | Earphone diaphragm laser cutting device and laser cutting method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117260023A (en) * | 2023-11-22 | 2023-12-22 | 海菲曼（天津）科技有限公司 | Earphone diaphragm laser cutting device and laser cutting method |
| CN117260023B (en) * | 2023-11-22 | 2024-02-20 | 海菲曼（天津）科技有限公司 | Earphone diaphragm laser cutting device and laser cutting method |
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