Audio player diaphragm amplitude detection method and system

Abstract

The application discloses a kind of audio player diaphragm amplitude detection method and system, the detection method includes: obtaining the real-time output impedance of audio player in the case of constant frequency sweep sound source within continuous time period at each time;Based on the diaphragm vibration function describing the relationship between the distance between the diaphragm and the front cavity wall in the audio player and the real-time output impedance, the distance between the diaphragm and the front cavity wall in the current audio player working process corresponding to the real-time output impedance of the first time is determined;The minimum of the distance between the diaphragm and the front cavity wall corresponding to multiple time points within the continuous time period is taken as the vibration distance;Based on the vibration distance and the static distance between the diaphragm and the front cavity wall when the diaphragm is in non-vibration state, the amplitude of the diaphragm is determined;Through the above scheme, the diaphragm amplitude of the audio player can be directly calculated without punching the box of the audio player, thereby simplifying the detection work of diaphragm amplitude in the modeling process of audio system, and effectively reducing the error.

Description

Technical Field

[0001] This invention relates to the field of audio modeling parameter detection technology, and in particular to a method and system for detecting the diaphragm amplitude of an audio player. Background Technology

[0002] For audio systems, especially professional audio systems (PAs), the design phase requires multiple rounds of modeling, testing, and evaluation. During modeling, the modeling parameters are set based on the amplitude and temperature protection of the diaphragm on the audio player (i.e., the speaker). Currently, in the design and modeling process of professional audio systems, to obtain the required diaphragm amplitude parameters for modeling, a small hole needs to be drilled in the speaker enclosure for each modeling step, then sealed with transparent plastic. A laser is then inserted through this hole to reach the diaphragm inside the speaker, thereby reading the diaphragm's amplitude. However, this method makes parameter acquisition relatively cumbersome and can lead to performance discrepancies between the speaker enclosure after the hole and the actual speaker enclosure. Summary of the Invention

[0003] The purpose of this invention is to provide an audio player diaphragm amplitude detection method and system that can obtain diaphragm amplitude parameters without drilling holes during the audio system modeling process, in order to solve the above-mentioned technical problems.

[0004] To achieve the above objectives, this invention discloses a method for detecting the diaphragm amplitude of an audio player, the method comprising:

[0005] The real-time output impedance of the audio player at each moment within a continuous time period is obtained by the detection device under the condition of a constant frequency sweeping sound source;

[0006] Based on the diaphragm vibration function describing the relationship between the distance between the diaphragm and the front cavity wall in the audio player and the real-time output impedance, the distance between the diaphragm and the front cavity wall during the current operation of the audio player at the first moment is determined to correspond to the real-time output impedance at the first moment.

[0007] The minimum distance between the diaphragm and the front cavity wall at multiple moments within a continuous time period is taken as the vibration distance.

[0008] The amplitude of the diaphragm is determined based on the vibration distance and the static distance between the diaphragm and the front cavity wall when the diaphragm is in a non-vibration state.

[0009] Preferably, the diaphragm vibration function is Z = R + i(ωL – 4πkd / ωεS), where Z is the real-time output impedance of the audio player, R is the design output impedance of the audio player, ω = 2πf, f is the frequency of the swept frequency source, S is the area of ​​the diaphragm of the audio player, ε is the dielectric constant of air, k is the electrostatic constant, d is the distance between the diaphragm and the front cavity wall at any time, and i is the imaginary unit;

[0010] The amplitude of the audio player is D = d0 - d'; d0 is the static distance between the diaphragm and the front cavity wall when the diaphragm is in a non-vibrating state, and d' is the vibration distance.

[0011] Preferably, when the real-time output impedance of the audio player is obtained by the detection device, the audio amplifier is in the maximum output power state.

[0012] Preferably, the testing equipment includes a multimeter or an oscilloscope.

[0013] This invention also discloses an audio player diaphragm amplitude detection system, which includes:

[0014] A detection device is used to obtain the real-time output impedance of the audio player under a constant frequency sweeping sound source;

[0015] The first calculation module is used to calculate the distance between the diaphragm and the front cavity wall during the current operation of the audio player based on the real-time output impedance and the preset diaphragm vibration function. The diaphragm vibration function describes the relationship between the distance between the diaphragm and the front cavity wall in the audio player and the real-time output impedance.

[0016] The selection module is used to select the minimum distance between the diaphragm and the front cavity wall from multiple moments within a continuous time period calculated by the first calculation module as the vibration distance.

[0017] The second calculation module is used to calculate the amplitude of the diaphragm based on the vibration distance and the static distance between the diaphragm and the front cavity wall when the diaphragm is in a non-vibration state.

[0018] Preferably, the diaphragm vibration function is Z = R + i(ωL – 4πkd / ωεS), where Z is the real-time output impedance of the audio player, R is the design output impedance of the audio player, ω = 2πf, f is the frequency of the swept frequency source, S is the area of ​​the diaphragm of the audio player, ε is the dielectric constant of air, k is the electrostatic constant, d is the distance between the diaphragm and the front cavity wall at any time, and i is the imaginary unit;

[0019] The amplitude of the audio player is D = d0 - d'; d0 is the static distance between the diaphragm and the front cavity wall when the diaphragm is in a non-vibrating state, and d' is the vibration distance.

[0020] Preferably, the audio amplifier is in its maximum output power state when the detection device obtains the real-time output impedance of the audio player.

[0021] Preferably, the testing equipment includes a multimeter or an oscilloscope.

[0022] This invention also discloses an audio player diaphragm amplitude detection system, which includes:

[0023] One or more processors;

[0024] Memory;

[0025] And one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the programs including instructions for performing the audio player diaphragm amplitude detection method as described above.

[0026] The present invention also discloses a computer-readable storage medium comprising a computer program that can be executed by a processor to perform the audio player diaphragm amplitude detection method as described above.

[0027] Compared with the prior art, the above-mentioned technical solution of the present invention only requires obtaining the real-time output impedance of the audio player. The real-time distance between the diaphragm and the front cavity wall of the current audio player can be calculated based on the diaphragm vibration function. Then, the smallest of several real-time distances is selected as the vibration distance. The amplitude of the diaphragm is then calculated based on the static distance between the diaphragm and the front cavity wall when the diaphragm is in a non-vibrating state. Therefore, with the above solution, the diaphragm amplitude of the audio player can be directly calculated without drilling holes in the audio player's enclosure, thereby simplifying the detection of diaphragm amplitude in the audio system modeling process and effectively reducing errors. Attached Figure Description

[0028] Figure 1 This is a flowchart of the detection method in an embodiment of the present invention.

[0029] Figure 2 This is a cross-sectional view of the audio player in an embodiment of the present invention.

[0030] Figure 3 This is a schematic diagram of the detection system in an embodiment of the present invention. Detailed Implementation

[0031] To illustrate the technical content, structural features, objectives, and effects of the present invention in detail, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0032] This embodiment discloses a method for detecting the diaphragm amplitude of an audio player, used for modeling audio systems, providing amplitude parameter detection for audio system (especially professional audio systems) modeling. This embodiment's detection method abandons the traditional laser detection principle, thus achieving a drilling-free operation. To facilitate understanding of the detection method in this embodiment, its inventive concept is first briefly introduced.

[0033] For audio players (commonly known as speakers), such as Figure 2 It produces sound through the vibration of a diaphragm within a sound cavity, which includes a front cavity and a rear cavity. There is a certain distance between the diaphragm and the front cavity wall, with air as the medium in between. This creates a capacitor structure between the diaphragm and the front cavity wall. During diaphragm vibration, a resonant capacitance is generated and applied to the audio player's circuitry. This capacitance affects the audio player's output impedance, and the output impedance has a functional relationship with the magnitude of this resonant capacitance. Therefore, by detecting the real-time output impedance of the audio player, the distance between the diaphragm and the front cavity wall can be calculated, and thus the diaphragm amplitude can be determined. Based on this, as... Figure 1 The detection method in this embodiment includes the following steps:

[0034] S1: Configure a sweeping audio source with a constant frequency for the audio player under test.

[0035] S2: Obtain the real-time output impedance of the audio player at each moment within a continuous time period under a constant frequency sweeping sound source by a detection device.

[0036] S3: Based on the diaphragm vibration function describing the relationship between the distance between the diaphragm and the front cavity wall in the audio player and the real-time output impedance, determine the distance between the diaphragm and the front cavity wall during the current operation of the audio player corresponding to the real-time output impedance at the first moment (i.e., any moment).

[0037] S4: Take the smallest distance between the diaphragm and the front cavity wall at multiple moments within the above continuous time period as the vibration distance.

[0038] S5: Calculate the amplitude of the diaphragm based on the vibration distance and the static distance between the diaphragm and the front cavity wall when the diaphragm is in a non-vibration state.

[0039] Specifically, the diaphragm vibration function is as follows:

[0040] Z = R + i(ωL – 4πkd / ωεS)

[0041] Where Z is the real-time output impedance of the audio player, R is the design output impedance of the audio player (with known fixed parameters), ω=2πf, f is the frequency of the swept audio source, S is the area of ​​the diaphragm of the audio player, ε is the dielectric constant of air, k is the electrostatic constant, d is the distance between the diaphragm and the front cavity wall at any time, and i is the imaginary unit.

[0042] Once the vibration distance d' is obtained, the amplitude D of the audio player is D = d0 - d'; d0 is the static distance between the diaphragm and the front cavity wall when the diaphragm is in a non-vibrating state.

[0043] Using the above detection method, by simply obtaining the real-time output impedance of the audio player through the detection equipment, the real-time distance between the diaphragm and the front cavity wall of the current audio player can be calculated based on the diaphragm vibration function. Then, the smallest of several real-time distances is selected as the vibration distance. Finally, the diaphragm amplitude is obtained by subtracting the vibration distance from the static distance. Therefore, this detection method eliminates the need to drill holes in the audio player's enclosure to directly calculate the diaphragm amplitude, thus simplifying the diaphragm amplitude detection work in the audio system modeling process and effectively reducing errors.

[0044] Optionally, when the real-time output impedance of the audio player is obtained through the detection device, the audio amplifier is made to be in the maximum output power state, thereby obtaining the maximum amplitude of the diaphragm.

[0045] Optionally, the testing equipment includes a multimeter or an oscilloscope. The oscilloscope can be used to quickly select the real-time output impedance corresponding to the minimum real-time distance (i.e., vibration distance) within a continuous time period. The real-time output impedance is the minimum value within that continuous time period.

[0046] This invention also discloses an audio player diaphragm amplitude detection system for use in audio system modeling, such as... Figure 3 The amplitude acquisition system includes a detection device, a first calculation module, a selection module, and a second calculation module.

[0047] The testing equipment is used to obtain the real-time output impedance of an audio player under a constant frequency sweeping audio source.

[0048] The first calculation module is used to calculate the distance between the diaphragm and the front cavity wall during the current operation of the audio player based on the real-time output impedance and the preset diaphragm vibration function. The diaphragm vibration function describes the relationship between the distance between the diaphragm and the front cavity wall in the audio player and the real-time output impedance.

[0049] The selection module is used to select the minimum distance between the diaphragm and the front cavity wall from multiple moments within a continuous time period calculated by the first calculation module as the vibration distance.

[0050] The second calculation module is used to calculate the amplitude of the diaphragm based on the vibration distance and the static distance between the diaphragm and the front cavity wall when the diaphragm is in a non-vibrating state.

[0051] Furthermore, the diaphragm vibration function is Z = R + i( ωL – 4πkd / ωεS), where Z is the real-time output impedance of the audio player, R is the designed output impedance of the audio player, ω = 2πf, f is the frequency of the sweep frequency source, S is the area of ​​the diaphragm of the audio player, ε is the dielectric constant of air, k is the electrostatic constant, and d is the distance between the diaphragm and the front cavity wall at any time.

[0052] The amplitude of an audio player is D = d0 - d'; d0 is the static distance between the diaphragm and the front cavity wall when the diaphragm is in a non-vibrating state, and d' is the vibration distance.

[0053] Furthermore, when the detection device obtains the real-time output impedance of the audio player, the audio amplifier is in the maximum output power state.

[0054] Furthermore, the testing equipment includes a multimeter or oscilloscope.

[0055] It should be noted that the working principle and process of the audio player diaphragm amplitude detection system in this embodiment are detailed in the above-mentioned audio player diaphragm amplitude detection method, and will not be repeated here.

[0056] This invention also discloses another audio player diaphragm amplitude detection system, which includes one or more processors, a memory, and one or more programs. The one or more programs are stored in the memory and configured to be executed by the one or more processors. The programs include instructions for performing the audio player diaphragm amplitude detection method described above. The processor can be a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits, used to execute the relevant programs to implement the functions required by the modules in the audio player diaphragm amplitude detection system of this application embodiment, or to execute the audio player diaphragm amplitude detection method of this application method embodiment.

[0057] This invention also discloses a computer-readable storage medium comprising a computer program executable by a processor to perform the audio player diaphragm amplitude detection method described above. The computer-readable storage medium can be any available medium accessible to a computer or a data storage device such as a server or data center integrating one or more available media. The available medium can be read-only memory (ROM), random access memory (RAM), or magnetic media, such as floppy disks, hard disks, magnetic tapes, magnetic disks, or optical media, such as digital versatile discs (DVDs), or semiconductor media, such as solid-state disks (SSDs).

[0058] This application also discloses a computer program product or computer program, which includes computer instructions stored in a computer-readable storage medium. The processor of an electronic device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the electronic device to perform the aforementioned audio player diaphragm amplitude detection method.

[0059] The above-disclosed embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. Therefore, any equivalent variations made in accordance with the claims of the present invention are still within the scope of the present invention.

Claims

1. A method for detecting the diaphragm amplitude of an audio player, characterized in that, include: The real-time output impedance of the audio player at each moment within a continuous time period is obtained by the detection device under the condition of a constant frequency sweeping sound source; Based on the diaphragm vibration function describing the relationship between the distance between the diaphragm and the front cavity wall in the audio player and the real-time output impedance, the distance between the diaphragm and the front cavity wall during the current operation of the audio player at the first moment is determined to correspond to the real-time output impedance at the first moment. The minimum distance between the diaphragm and the front cavity wall at multiple moments within a continuous time period is taken as the vibration distance. The amplitude of the diaphragm is determined based on the vibration distance and the static distance between the diaphragm and the front cavity wall when the diaphragm is in a non-vibration state. The diaphragm vibration function is Z = R + i(ωL – 4πkd / ωεS), where Z is the real-time output impedance of the audio player, R is the design output impedance of the audio player, ω = 2πf, f is the frequency of the swept frequency source, S is the area of ​​the diaphragm of the audio player, ε is the dielectric constant of air, k is the electrostatic constant, d is the distance between the diaphragm and the front cavity wall at any time, and i is the imaginary unit. The amplitude of the audio player is D = d0 - d'; d0 is the static distance between the diaphragm and the front cavity wall when the diaphragm is in a non-vibrating state, and d' is the vibration distance.

2. The method for detecting the diaphragm amplitude of an audio player according to claim 1, characterized in that, When the real-time output impedance of the audio player is obtained by the detection device, the audio amplifier is in the maximum output power state.

3. The method for detecting the diaphragm amplitude of an audio player according to claim 1, characterized in that, The testing equipment includes a multimeter or an oscilloscope.

4. An audio player diaphragm amplitude detection system, characterized in that, It includes: A detection device is used to obtain the real-time output impedance of the audio player under a constant frequency sweeping sound source; The first calculation module is used to calculate the distance between the diaphragm and the front cavity wall during the current operation of the audio player based on the real-time output impedance and the preset diaphragm vibration function. The diaphragm vibration function describes the relationship between the distance between the diaphragm and the front cavity wall in the audio player and the real-time output impedance. The selection module is used to select the minimum distance between the diaphragm and the front cavity wall from multiple moments within a continuous time period calculated by the first calculation module as the vibration distance. The second calculation module is used to calculate the amplitude of the diaphragm based on the vibration distance and the static distance between the diaphragm and the front cavity wall when the diaphragm is in a non-vibration state. The diaphragm vibration function is Z = R + i(ωL – 4πkd / ωεS), where Z is the real-time output impedance of the audio player, R is the design output impedance of the audio player, ω = 2πf, f is the frequency of the swept frequency source, S is the area of ​​the diaphragm of the audio player, ε is the dielectric constant of air, k is the electrostatic constant, d is the distance between the diaphragm and the front cavity wall at any time, and i is the imaginary unit. The amplitude of the audio player is D = d0 - d'; d0 is the static distance between the diaphragm and the front cavity wall when the diaphragm is in a non-vibrating state, and d' is the vibration distance.

5. The audio player diaphragm amplitude detection system according to claim 4, characterized in that, When the detection device obtains the real-time output impedance of the audio player, the audio amplifier is in the maximum output power state.

6. The audio player diaphragm amplitude detection system according to claim 4, characterized in that, The testing equipment includes a multimeter or an oscilloscope.

7. An audio player diaphragm amplitude detection system, characterized in that, include: One or more processors; Memory; And one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the programs including instructions for performing the audio player diaphragm amplitude detection method as described in any one of claims 1 to 3.

8. A computer-readable storage medium, characterized in that, Includes a computer program, which can be executed by a processor to perform the audio player diaphragm amplitude detection method as described in any one of claims 1 to 3.

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