Distortion repair method and device, sound box equipment and storage medium

Abstract

The application discloses a distortion repairing method and device, a sound box equipment and a storage medium, relates to the loudspeaker technical field, and the method is applied to the sound box equipment, and the method comprises the following steps: when the loudspeaker of the sound box equipment is controlled to work, a pre-stored voltage is acquired; wherein the pre-stored voltage is a direct current voltage obtained according to a detected total harmonic distortion value and a preset threshold range when the sound box equipment is tested before leaving the factory; and the pre-stored voltage is coupled to an input end of the loudspeaker, so that a voice coil of the loudspeaker works at a center balance position of a magnetic circuit assembly of the loudspeaker. The application solves the problem that the total harmonic distortion of the loudspeaker product on the actual production line cannot meet the design requirements in the low-frequency band, and realizes the effect of optimizing the distortion in the low-frequency band.

Description

Technical Field

[0001] This invention relates to the field of loudspeaker technology, and more particularly to a distortion repair method, apparatus, speaker device, and storage medium. Background Technology

[0002] During loudspeaker operation, total harmonic distortion (THD) is more pronounced in the low-frequency range. THD is relatively low only when the voice coil is at the center of the magnetic circuit assembly. However, in actual production lines for loudspeaker products such as speakers and headphones, especially during mass production, deviations in assembly processes and material allowances can cause the voice coil to deviate slightly from the center of the magnetic circuit assembly. This results in THD failing to meet design requirements, and consequently, the product's sound quality not meeting consumer demands. Summary of the Invention

[0003] The main objective of this invention is to provide a distortion repair method, apparatus, speaker device, and storage medium, aiming to solve the technical problem that the total harmonic distortion in the low-frequency range of loudspeaker products on actual production lines cannot meet design requirements.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] In a first aspect, the present invention provides a distortion repair method applied to speaker devices, the method comprising:

[0006] When the speaker of the speaker device is controlled to work, a pre-stored voltage is acquired; wherein, the pre-stored voltage is a DC voltage obtained by the speaker device during factory testing based on the detected total harmonic distortion value and a preset threshold range;

[0007] The pre-stored voltage is coupled to the input terminal of the speaker so that the speaker's voice coil operates at the center balanced position of the speaker's magnetic circuit assembly.

[0008] Optionally, in the above distortion repair method, before the step of obtaining the pre-stored voltage when controlling the speaker of the speaker device to work, the method further includes:

[0009] When the speaker device is subjected to factory testing, a first distortion value is obtained. The first distortion value is the total harmonic distortion value of the speaker device when tested in a preset frequency band.

[0010] When the first distortion value is not within the preset threshold range, a first calibration voltage is determined. The preset threshold range is set according to the preset frequency band, and the first calibration voltage is a DC voltage of a preset value.

[0011] The first calibration voltage is coupled to the loudspeaker to obtain a second distortion value, which is the total harmonic distortion value of the speaker device when tested in the preset frequency band;

[0012] If the second distortion value is within the preset threshold range, the first calibration voltage is determined as the pre-stored voltage;

[0013] Store the pre-stored voltage.

[0014] Optionally, in the above distortion repair method, after the step of obtaining the detected first distortion value, the method further includes:

[0015] When the first distortion value is within a preset threshold range, the pre-stored voltage is determined to be zero, and the process jumps to the step of storing the pre-stored voltage.

[0016] After the step of obtaining the pre-stored voltage when controlling the speaker of the speaker device to work, the method further includes:

[0017] Determine whether the pre-stored voltage is zero;

[0018] If the pre-stored voltage is zero, the speaker is controlled to operate normally;

[0019] If the pre-stored voltage is not zero, then the step of coupling the pre-stored voltage to the input terminal of the speaker is performed so that the voice coil of the speaker operates at the center balanced position of the magnetic circuit assembly of the speaker.

[0020] Optionally, in the above distortion repair method, after the step of coupling the first calibration voltage to the loudspeaker to obtain the second distortion value, the method further includes:

[0021] Determine whether the second distortion value is less than the first distortion value;

[0022] If the second distortion value is greater than or equal to the first distortion value, then the first calibration step size is determined based on the first calibration voltage, and the first calibration step size is negative.

[0023] The second calibration voltage is obtained based on the first calibration voltage and the first calibration step size;

[0024] The second calibration voltage is coupled to the loudspeaker to obtain a third distortion value, which is the total harmonic distortion value of the speaker device when tested in the preset frequency band;

[0025] If the third distortion value is within the preset threshold range, the second calibration voltage is determined as the pre-stored voltage, and the process jumps to the step of storing the pre-stored voltage.

[0026] If the third distortion value is not within the preset threshold range, the step of obtaining the second calibration voltage based on the first calibration voltage and the first calibration step size is returned to obtain a new second calibration voltage based on the second calibration voltage and the first calibration step size, until the third distortion value is within the preset threshold range.

[0027] Optionally, in the above distortion repair method, after the step of determining whether the second distortion value is less than the first distortion value, the method further includes:

[0028] If the second distortion value is less than the first distortion value, then it is further determined whether the second distortion value is within the preset threshold range;

[0029] If the second distortion value is within the preset threshold range, then the step of determining the first calibration voltage as the pre-stored voltage is performed;

[0030] If the second distortion value is not within the preset threshold range, then the second calibration step size is determined based on the first calibration voltage, and the second calibration step size is a positive value;

[0031] Based on the first calibration voltage and the second calibration step size, the second calibration voltage is obtained, and the step of coupling the second calibration voltage to the speaker to obtain the third distortion value is performed.

[0032] Optionally, in the above distortion repair method, the step of returning to the step of obtaining the second calibration voltage based on the first calibration voltage and the first calibration step size if the third distortion value is not within the preset threshold range, to obtain a new second calibration voltage based on the second calibration voltage and the first calibration step size, until the third distortion value is within the preset threshold range, includes:

[0033] If the third distortion value is not within the preset threshold range, then the current calibration count is determined;

[0034] Determine whether the number of calibrations exceeds a preset threshold.

[0035] If the number of calibrations does not exceed the preset threshold, the process returns to the step of obtaining the second calibration voltage based on the first calibration voltage and the first calibration step size, so as to obtain a new second calibration voltage based on the second calibration voltage and the first calibration step size, until the third distortion value is within the preset threshold range.

[0036] Optionally, in the above distortion repair method, after the step of determining whether the number of calibrations exceeds a preset threshold, the method further includes:

[0037] If the number of calibration attempts exceeds the preset threshold, a calibration failure message will be displayed along with the pre-stored reason for the failure.

[0038] Secondly, the present invention provides a distortion repair device for use in speaker equipment, the device comprising:

[0039] The data acquisition module is used to acquire a pre-stored voltage when controlling the speaker of the speaker device to work; wherein the pre-stored voltage is a DC voltage obtained by the speaker device during factory testing based on the detected total harmonic distortion value and a preset threshold range;

[0040] A distortion correction module is used to couple the pre-stored voltage to the input terminal of the speaker so that the voice coil of the speaker operates at the center balanced position of the magnetic circuit assembly of the speaker.

[0041] Thirdly, the present invention provides a speaker device, the speaker device including a processor and a memory, the memory storing a distortion repair program, and when the distortion repair program is executed by the processor, implementing the distortion repair method as described above.

[0042] Fourthly, the present invention provides a computer-readable storage medium storing a computer program that, when executed by one or more processors, implements the distortion repair method described above.

[0043] The above-described one or more technical solutions provided by this invention can have the following advantages or at least achieve the following technical effects:

[0044] This invention proposes a distortion repair method, apparatus, speaker device, and storage medium. During factory testing of the speaker device, a DC voltage is obtained and stored as a pre-stored voltage based on the detected total harmonic distortion (THD) value and a preset threshold range. When the speaker is operated, this pre-stored voltage is coupled to the speaker's input terminal, ensuring the speaker's voice coil operates at the center of the magnetic circuit assembly. This invention eliminates the need for external components in the speaker or speaker device. Distortion repair is achieved simply by modifying the main control chip of the speaker device within the existing speaker hardware structure. The repair effect is significant without adding excessive costs. This invention is particularly suitable for optimizing low-frequency distortion. Attached Figure Description

[0045] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0046] Figure 1 This is a flowchart illustrating the first embodiment of the distortion repair method of the present invention;

[0047] Figure 2 This is a schematic diagram of the hardware structure of the speaker device involved in the present invention;

[0048] Figure 3 The THD curves before and after calibration are shown for the distortion repair method of the present invention.

[0049] Figure 4 This is a flowchart illustrating the second embodiment of the distortion repair method of the present invention;

[0050] Figure 5 This is a flowchart illustrating the third embodiment of the distortion repair method of the present invention;

[0051] Figure 6 This is a functional module diagram of the first embodiment of the distortion repair device of the present invention.

[0052] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0053] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0054] It should be noted that in this invention, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element. In this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. In this invention, the use of suffixes such as "module," "component," or "unit" to denote elements is merely for illustrative purposes and has no specific meaning in itself. Therefore, "module," "component," or "unit" can be used interchangeably. Those skilled in the art will understand the specific meaning of the above terms in this invention according to the specific circumstances. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this is based on the fact that those skilled in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0055] A loudspeaker consists of a frame, a vibrating system mounted on the frame, and a magnetic circuit assembly. The magnetic circuit assembly forms a magnetic gap, within which a magnetic field is generated. The diaphragm and voice coil constitute a flexible suspension system. When the loudspeaker operates, the voice coil is energized, and under the influence of the magnetic field in the magnetic gap, it drives the diaphragm to vibrate, thus moving the air to produce sound. Total Harmonic Distortion (THD) refers to the number of harmonic components in the output signal compared to the input signal. The lower the THD value, the purer the sound and the higher the product quality.

[0056] Analysis of existing technologies reveals that during loudspeaker operation, total harmonic distortion (THD) is more pronounced in the low-frequency range, while it is relatively low when the voice coil is at the center of the magnetic circuit assembly. However, in actual production lines for loudspeaker products such as speakers and headphones, especially during mass production, deviations in assembly processes and material allowances can cause the voice coil to slightly deviate from the center of the magnetic circuit assembly. This results in THD failing to meet design requirements, ultimately leading to sound quality that does not meet consumer demands.

[0057] In view of the technical problem that the total harmonic distortion (THD) in the low-frequency range of loudspeaker products produced on actual production lines in the prior art cannot meet the design requirements, this invention provides a distortion repair method, the overall idea of ​​which is as follows:

[0058] When the speaker of the control speaker device is working, a pre-stored voltage is acquired; wherein, the pre-stored voltage is a DC voltage obtained by the speaker device during factory testing based on the detected total harmonic distortion value and a preset threshold range; the pre-stored voltage is coupled to the input terminal of the speaker so that the voice coil of the speaker works at the center balanced position of the speaker's magnetic circuit assembly.

[0059] Through the above technical solution, during the factory testing of the speaker equipment, a DC voltage is obtained and stored based on the detected total harmonic distortion (THD) value and a preset threshold range, serving as a pre-stored voltage. When controlling the speaker of the speaker equipment to operate, this pre-stored voltage is coupled to the input terminal of the speaker, so that the voice coil of the speaker operates at the center balanced position of the magnetic circuit assembly. This invention does not require the installation of other external components in the speaker or speaker equipment. It only requires program modification of the main control chip of the speaker equipment based on the existing speaker hardware structure to achieve distortion repair. The repair effect is significant and will not increase costs excessively. This invention is particularly suitable for optimizing low-frequency distortion.

[0060] The distortion repair method, apparatus, speaker device, and storage medium provided by the present invention will be described in detail below with reference to the accompanying drawings and through specific embodiments and implementation methods.

[0061] Example 1

[0062] Reference Figure 1 The flowchart illustrates the first embodiment of the distortion repair method of the present invention, which is applied to speaker equipment.

[0063] Speaker devices refer to devices that can play sound. Speaker devices can be terminal devices such as mobile phones, computers, tablets, and embedded industrial control computers, or component devices such as speakers and loudspeakers.

[0064] like Figure 2 The diagram shown is a schematic of the hardware structure of a speaker device. The speaker device may include: a processor 1001, such as a CPU (Central Processing Unit), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005.

[0065] Specifically, the communication bus 1002 is used to realize the connection and communication between these components; the user interface 1003 is used to connect to the client and communicate data with the client. The user interface 1003 may include output units, such as a display screen, and input units, such as a keyboard; the network interface 1004 is used to connect to the backend server and communicate data with the backend server. The network interface 1004 may include input / output interfaces, such as standard wired interfaces and wireless interfaces, such as Wi-Fi interfaces; the memory 1005 is used to store various types of data. This data may include, for example, instructions for any application or method in the speaker device, as well as application-related data. The memory 1005 may be a high-speed RAM memory or a stable memory, such as a disk storage device; optionally, the memory 1005 may also be a storage device independent of the processor 1001, and so on. Figure 2 The memory 1005 may include an operating system, a network communication module, a user interface module, and a distortion repair program; the processor 1001 is used to call the distortion repair program stored in the memory 1005 and perform the following operations:

[0066] When the speaker of the control speaker device is working, a pre-stored voltage is acquired; wherein, the pre-stored voltage is a DC voltage obtained by the control speaker device during factory testing based on the detected total harmonic distortion value and a preset threshold range;

[0067] A pre-stored voltage is coupled to the input of the speaker so that the speaker's voice coil operates at the center of the speaker's magnetic circuit assembly.

[0068] Based on the speaker equipment mentioned above, the following will be combined with... Figure 1 The flowchart shown illustrates the distortion repair method of this embodiment in detail. The method may include the following steps:

[0069] Step S200: When controlling the speaker of the speaker device to work, obtain the pre-stored voltage; wherein, the pre-stored voltage is the DC voltage obtained by the speaker device during factory testing based on the detected total harmonic distortion value and a preset threshold range.

[0070] Specifically, speaker enclosures can be pre-assembled, mass-produced units on a production line, such as speaker cabinets or headphones equipped with loudspeakers. Before these devices leave the factory, they undergo testing to determine a DC voltage suitable for certain characteristics of this batch of products. These characteristics include those prone to deviation and distortion due to factors such as speaker assembly processes and material allowances. During testing, this DC voltage couples with the speaker's input voltage, ensuring the speaker's voice coil operates at the center of the magnetic circuit assembly. It should be noted that the speaker's input voltage can be set according to actual needs, i.e., it can be AC ​​or DC. The preset voltage, however, is for coupling with the input voltage and needs to be a constant value; therefore, the preset voltage should be a DC voltage.

[0071] In practice, when the main control chip (processor) of the speaker device generates a control signal (a voltage signal) and outputs it to the speaker section, the processor can retrieve the stored DC voltage, i.e., obtain the pre-stored voltage. It should be noted that in obtaining the pre-stored voltage, the DC voltage pre-stored in the speaker device's memory is essentially a magnitude; retrieving it actually retrieves the specific voltage value so that the speaker device can generate a corresponding DC voltage based on that value in actual application, thus obtaining the pre-stored voltage.

[0072] Step S400: Couple the pre-stored voltage to the input terminal of the speaker so that the voice coil of the speaker operates at the center balanced position of the magnetic circuit assembly of the speaker.

[0073] Specifically, the pre-stored voltage is coupled to the speaker's input terminal, and then coupled with the input signal required for the speaker's operation, such as the control signal output from the processor to the speaker. As the voltage received by the speaker changes, the voltage input to the voice coil changes accordingly. At this time, the voice coil, due to the change in the received voltage, begins to work after being energized. Under the influence of the magnetic field generated within the magnetic gap formed by the magnetic circuit assembly, its position shifts to the central equilibrium position of the magnetic circuit assembly. Working in this position, it drives the diaphragm to vibrate, thereby achieving sound production. During this sound production process, because the voice coil is in the central equilibrium position of the magnetic circuit assembly, the THD is much lower than when the speaker operates without this pre-stored voltage, thus reducing sound distortion and improving sound quality.

[0074] like Figure 3 The diagram shows two speaker systems containing the same loudspeaker. One test shows a direct THD test, and the other shows a THD test performed after distortion correction using the method described in this embodiment. This embodiment achieves voice coil calibration by coupling a pre-stored voltage to the loudspeaker's input terminal, resulting in the following THD test... Figure 3The THD curve comparison graph shown has the horizontal axis representing the operating frequency band and the vertical axis representing the THD value. As can be seen from the graph, the THD was higher before calibration and decreased after calibration, meaning the distortion was improved, especially in the low-frequency range below 100Hz. Therefore, it can be concluded that the distortion repair method of this invention can effectively improve low-frequency distortion and is suitable for loudspeakers with significant low-frequency distortion.

[0075] The distortion repair method provided in this embodiment obtains and stores a DC voltage as a pre-stored voltage based on the detected total harmonic distortion value and a preset threshold range during the factory testing of the speaker equipment. When the speaker of the speaker equipment is controlled to operate, this pre-stored voltage is coupled to the input terminal of the speaker, so that the voice coil of the speaker operates at the center balanced position of the magnetic circuit assembly. This invention does not require the installation of other external components in the speaker or speaker equipment. It only requires a program modification of the main control chip of the speaker equipment based on the existing hardware structure of the speaker to achieve distortion repair. The repair effect is significant and will not increase the cost too much. This invention is particularly suitable for optimizing low-frequency distortion.

[0076] Example 2

[0077] Based on the same inventive concept, referring to Figure 4 This paper presents a second embodiment of the distortion repair method of the present invention, which is applied to speaker equipment. The following is a combination of... Figure 4 The flowchart shown illustrates the distortion repair method of this embodiment in detail. The method may include the following steps:

[0078] Step S100: Obtain and store the pre-stored voltage.

[0079] Specifically, step S100 may include:

[0080] Step S110: When the speaker device is subjected to factory testing, the first distortion value is obtained. The first distortion value is the total harmonic distortion value of the speaker device when it is first tested in a preset frequency band.

[0081] Specifically, after the speaker equipment is assembled on the mass production line, it is tested before leaving the factory to calculate the total harmonic distortion (THD) of the speaker equipment before repair, obtaining the first distortion value. This is the first test performed on the speaker during the factory testing phase. The preset frequency band is a test frequency band set according to the operating frequency band of this batch of speaker equipment. For example, the operating frequency band of typical speaker equipment is within 20Hz-20kHz, so a low-frequency band, such as 50-60Hz, can be selected as the test frequency band. The low-frequency band is chosen here because the displacement of the voice coil inside the speaker will cause more noticeable distortion in the low-frequency range; however, other frequency bands can also be selected.

[0082] Step S130: When the first distortion value is not within the preset threshold range, determine the first calibration voltage. The preset threshold range is set according to the preset frequency band, and the first calibration voltage is a preset DC voltage.

[0083] Specifically, the first calibration voltage can be a directly set DC voltage. Correspondingly, after obtaining the first distortion value, it is determined whether the first distortion value is within a preset threshold range. If the first distortion value is not within the preset threshold range, a preset calibration value is obtained. Based on the magnitude of this calibration value, the power supply or power management module of the speaker device is controlled to output a corresponding DC voltage to obtain the first calibration voltage. The first calibration voltage can also be a preset value selected or calculated based on the first distortion value.

[0084] Step S150: Couple the first calibration voltage to the speaker to obtain a second distortion value, the second distortion value being the total harmonic distortion value of the speaker device during the test in the preset frequency band after the initial calibration.

[0085] Specifically, if the first distortion value is not within the preset threshold range, it indicates that the voice coil position inside the speaker has indeed shifted, and the speaker distortion is quite significant. In this case, it is necessary to set a pre-stored voltage so that the speaker can perform distortion repair based on this pre-stored voltage during subsequent operation. After obtaining the first calibration voltage, it can be coupled to the speaker to continue the secondary test. This is the first calibration performed on the speaker during the factory testing phase, and then the second distortion value can be calculated. The specific process of the secondary test is the same as the first test in step S110, and will not be repeated here.

[0086] Step S170: If the second distortion value is within the preset threshold range, the first calibration voltage is determined as the pre-stored voltage;

[0087] Step S180: If the second distortion value is not within the preset threshold range, determine the calibration step size and return to the step of determining the first calibration voltage, so as to redetermine the first calibration voltage according to the first calibration voltage and the calibration step size, until the second distortion value is within the preset threshold range.

[0088] Specifically, after obtaining the second distortion value, it can be directly determined whether the second distortion value is within the preset threshold range. If it is, that is, the second distortion value is within the preset threshold range, the first calibration voltage can be determined as the pre-stored voltage, and step S190 can be continued. If not, that is, the second distortion value is not within the preset threshold range, a calibration step size can be determined by obtaining a preset value, and then return to step S130 to redetermine the first calibration voltage according to the first calibration voltage and the calibration step size, and then continue to execute step S150 to couple the redetermined first calibration voltage to the speaker, continue to obtain the second distortion value, and continue to make judgments. This process is repeated until the second distortion value is within the preset threshold range, and the corresponding first calibration voltage at this time is determined as the pre-stored voltage.

[0089] Step S190: Store the pre-stored voltage.

[0090] Specifically, the finalized preset voltage is stored in the speaker device's memory, so that it can be directly called up in subsequent work to repair distortion and improve the sound quality of the speaker device.

[0091] Step S200: When controlling the speaker of the speaker device to work, obtain the pre-stored voltage; wherein, the pre-stored voltage is the DC voltage obtained by the speaker device during factory testing based on the detected total harmonic distortion value and a preset threshold range.

[0092] Step S400: Couple the pre-stored voltage to the input terminal of the speaker so that the voice coil of the speaker operates at the center balanced position of the magnetic circuit assembly of the speaker.

[0093] For more details on the implementation of steps S200 to S400, please refer to the description in the implementation of steps S200 to S400 in Embodiment 1. For the sake of brevity, these details will not be repeated here.

[0094] In another embodiment, after step S110, the method may further include:

[0095] Step S120: When the first distortion value is within the preset threshold range, the pre-stored voltage is determined to be zero, and the process jumps to the step of storing the pre-stored voltage, i.e., step S190.

[0096] Correspondingly, after step S200, the method may also include:

[0097] Step S310: Determine whether the pre-stored voltage is zero;

[0098] Step S320: If the pre-stored voltage is zero, control the speaker to work normally;

[0099] Step S330: If the pre-stored voltage is not zero, then perform the step of coupling the pre-stored voltage to the input terminal of the speaker so that the voice coil of the speaker works at the center balance position of the magnetic circuit assembly of the speaker, i.e., step S400.

[0100] Specifically, during the factory testing phase of the speaker equipment, after obtaining the first distortion value through step S110, it is determined whether the first distortion value is within a preset threshold range. If the first distortion value is within the preset threshold range, it indicates that the THD of the speaker equipment meets the design requirements, and distortion repair of the speaker is not required during actual operation. The specific implementation process is as follows: the pre-stored voltage is determined to be zero. During the actual use of the speaker equipment, when the speaker equipment controls the speaker to work, the pre-stored voltage is obtained. Then, based on the result of determining whether the pre-stored voltage is zero, the step of controlling the speaker to work normally can be selected. Correspondingly, in the actual process, if the pre-stored voltage is not zero, it indicates that a DC voltage for distortion repair has been determined and stored during the testing phase. At this time, step S400 can be executed to achieve distortion repair.

[0101] The distortion repair method provided in this embodiment determines a suitable pre-stored voltage for each batch of speaker products by testing the speaker equipment before mass production. This pre-stored voltage is then used to couple with the speaker input for distortion repair during actual use. A step is added to determine whether the pre-stored voltage is zero, allowing selection between distortion repair and normal operation.

[0102] Example 3

[0103] Based on the same inventive concept, referring to Figure 5 Based on any implementation of Embodiment 2, a third embodiment of the distortion repair method of the present invention is proposed, which is also applied to speaker equipment. The following is in conjunction with... Figure 5 The flowchart shown below provides a detailed description of the distortion repair method in this embodiment.

[0104] Furthermore, after step S150, the method may further include:

[0105] Step S160: Determine whether the second distortion value is less than the first distortion value.

[0106] Specifically, during the factory testing phase of the speaker equipment, the total harmonic distortion value obtained after the initial repair, i.e., the second distortion value, is compared with the first distortion value obtained before the repair to determine whether the distortion of the speaker equipment has been improved.

[0107] Step S161: If the second distortion value is greater than or equal to the first distortion value, then determine the first calibration step size based on the first calibration voltage, wherein the first calibration step size is negative.

[0108] Specifically, if the second distortion value is not less than, or greater than, or equal to, the first distortion value, it means that directly using the current first calibration voltage coupled to the speaker to repair distortion is useless for this speaker device. This indicates that there may be a situation where the voice coil's operating position cannot be calibrated by increasing the input voltage of the voice coil in the speaker, or that over-calibration has occurred. In this case, you can try calibrating the voice coil's operating position by decreasing the input voltage of the voice coil in the speaker, or conversely decreasing the calibration voltage to continue distortion repair. For example, when the first calibration voltage is 1V, if the obtained second distortion value is greater than or equal to the first distortion value, in order to reduce the input voltage of the voice coil in the speaker, the first calibration step size can be set to any negative number, such as -1V or -2V. The specific value can be set according to actual needs. As another example, when the first calibration voltage is 2V, if the obtained second distortion value is greater than or equal to the first distortion value, in this case, you can conversely decrease the calibration voltage, setting the first calibration step size to any negative value less than 2V, such as -1V. The specific value can be set according to actual needs.

[0109] Step S162: Based on the first calibration voltage and the first calibration step size, obtain the second calibration voltage, which is the DC voltage after updating the voltage magnitude.

[0110] Specifically, when calculating the second calibration voltage based on the first calibration voltage and the first calibration step size, the first calibration voltage and the first calibration step size are directly added together to obtain the second calibration voltage. For example, 1V - 2V = -1V, or 2V - 1V = 1V. In this case, the second calibration voltage is obtained by reducing the first calibration voltage by the corresponding size of the first calibration step size.

[0111] Step S163: Couple the second calibration voltage to the speaker to obtain a third distortion value, wherein the third distortion value is the total harmonic distortion value of the speaker device after secondary calibration and testing in the preset frequency band.

[0112] Specifically, after obtaining the second calibration voltage, the test continues by coupling the second calibration voltage to the speaker. This coupling is the second calibration in the testing phase and belongs to the third test. The specific test process is the same as the previous test process, and will not be repeated here. After the test, the third distortion value can be obtained.

[0113] Step S164: If the third distortion value is within the preset threshold range, the second calibration voltage is determined as the pre-stored voltage, and the process jumps to the step of storing the pre-stored voltage.

[0114] Step S165: If the third distortion value is not within the preset threshold range, return to the step of obtaining the second calibration voltage based on the first calibration voltage and the first calibration step size, so as to obtain a new second calibration voltage based on the second calibration voltage and the first calibration step size, until the third distortion value is within the preset threshold range.

[0115] Specifically, after obtaining the third distortion value, it can be determined whether the third distortion value is within the preset threshold range. If so, that is, the third distortion value is within the preset threshold range, the corresponding calibration voltage, i.e., the second calibration voltage, can be determined as the pre-stored voltage and stored. When the speaker device controls the speaker to work, it can be coupled with the speaker's input signal during distortion repair, so that the speaker's voice coil works at the center balance position of the speaker's magnetic circuit assembly, thereby ensuring that the speaker's THD in the speaker device meets the design requirements. If not, that is, the third distortion value is not within the preset threshold range, the calibration voltage can be modified. Specifically, steps S162 and S163 can be repeated until the third distortion value is within the preset threshold range. In other words, at this time, coupling the corresponding second calibration voltage to the speaker can reduce the THD. Then, step S164 can be executed to determine the corresponding second calibration voltage as the pre-stored voltage and store it, so that the speaker device can perform distortion repair when controlling the speaker to work.

[0116] In one embodiment, after step S160, the method may further include:

[0117] Step S166: If the second distortion value is less than the first distortion value, then further determine whether the second distortion value is within the preset threshold range.

[0118] Specifically, if the second distortion value is less than the first distortion value, it means that the distortion has been improved after the first calibration voltage is coupled to the speaker. However, it is not clear at this time whether the first calibration voltage is the most suitable pre-stored voltage. Therefore, it can be further determined whether the second distortion value is within the preset threshold range, so as to perform the steps of storing the pre-stored voltage or modifying the calibration voltage accordingly.

[0119] Step S167: If the second distortion value is within the preset threshold range, then proceed to the step of determining the first calibration voltage as the pre-stored voltage.

[0120] Specifically, if the second distortion value is within the preset threshold range, it indicates that the first calibration voltage not only improves the distortion but also enables the speaker device to meet THD design requirements. Therefore, the first calibration voltage can be directly determined as the pre-stored voltage, i.e., step S170 is executed, and then step S190 is executed to store the pre-stored voltage. Based on the implementation method of Embodiment 2, a step to confirm whether the distortion has been improved is added to select an appropriate way to modify the calibration voltage.

[0121] Step S168: If the second distortion value is not within the preset threshold range, then determine the second calibration step size based on the first calibration voltage, wherein the second calibration step size is a positive value.

[0122] Specifically, if the second distortion value is not within the preset threshold range, it means that although the first calibration voltage improved the distortion, it still cannot make the speaker device meet the THD design requirements. In this case, a positive calibration value can be determined based on the first calibration voltage as the second calibration step size. For example, when the first calibration voltage is 1V, if the obtained second distortion value is less than the first distortion value, but the second distortion value is not within the preset threshold range, the second calibration step size can be set to any positive number, such as 1V or 2V. The specific value can be set according to actual needs.

[0123] Step S169: Based on the first calibration voltage and the second calibration step size, obtain the second calibration voltage, and perform the step of coupling the second calibration voltage to the speaker to obtain the third distortion value.

[0124] Specifically, after calculating the second calibration voltage based on the first calibration voltage and the second calibration step size, the process can proceed to step S163. In calculating the second calibration voltage, the first calibration voltage and the first calibration step size are directly added together to obtain the second calibration voltage; for example, 1V + 2V = 3V. In this case, the second calibration voltage is obtained by increasing the first calibration voltage by the corresponding amount of the second calibration step size. This differs from the method used in step S162 for calculating the second calibration voltage; the calibration voltage is modified in the opposite direction.

[0125] A step has been added to determine whether the distortion of the speaker device has been improved. The calibration voltage can be modified in two ways. The calibration voltage corresponding to the final test meeting the THD design requirements is determined as the pre-stored voltage. The requirements for setting preset parameters such as the first calibration voltage and calibration step size have been reduced, making it easier to adjust specific parameters during the test. In particular, the adjustment of the calibration voltage can meet the needs of more scenarios.

[0126] In another embodiment, step S165 may further include:

[0127] Step S165.1: If the third distortion value is not within the preset threshold range, then determine the current calibration count;

[0128] Step S165.2: Determine whether the number of calibrations exceeds a preset threshold;

[0129] Step S165.3: If the number of calibrations does not exceed the preset threshold, return to the step of obtaining the second calibration voltage based on the first calibration voltage and the first calibration step size, so as to obtain a new second calibration voltage based on the second calibration voltage and the first calibration step size, until the third distortion value is within the preset threshold range.

[0130] Step S165.4: If the number of calibration attempts exceeds the preset threshold, a calibration failure message and the pre-stored reason for failure will be displayed.

[0131] Specifically, step S165 adds a step to determine the number of calibrations. The number of calibrations can be counted based on the number of times the calibration voltage is determined. For example, in the above steps, when the first calibration voltage is obtained and a distortion repair test is performed accordingly, and a second distortion value is obtained, the number of calibrations is 1. When the second calibration voltage is obtained and a third distortion value is obtained, the number of calibrations is 2. In actual implementation, when it is necessary to cyclically determine the second calibration voltage, the number of calibrations is increased by one for each cycle.

[0132] When the third distortion value is not within the preset threshold range, the current calibration count is obtained, for example, 2. It is then determined whether the calibration count exceeds the preset threshold, which can be set according to actual needs. If it does not exceed the threshold, the original step S165 is executed normally, i.e., returning to step S162 to obtain a new second calibration voltage, until the third distortion value is within the preset threshold range. If it does exceed the threshold, it indicates that after multiple calibrations, the distortion of the speaker device cannot be effectively repaired. There may be other reasons why the THD does not meet design requirements, such as foreign objects in the voice coil or an incorrect voice coil setting. These reasons can be imported into the memory by the designer. When step S165.2 determines that the calibration count exceeds the preset threshold, the pre-stored failure reasons are retrieved and displayed along with the calibration failure message in step S165.4, reminding the tester to pay attention to other reasons.

[0133] For more details on the specific implementation of the above method steps, please refer to the description of the specific implementation in Embodiment 1 or 2. For the sake of brevity, these details will not be repeated here.

[0134] This embodiment determines an accurate calibration voltage that better matches the actual needs of the speaker device by comparing it with a preset threshold range multiple times and changing the calibration voltage. This voltage is then stored as a pre-stored voltage. By determining a suitable pre-stored voltage based on the actual needs of the product and its specific operating frequency band, it can meet the needs of more products.

[0135] Example 4

[0136] Based on the same inventive concept, referring to Figure 6 The present invention provides a first embodiment of the distortion repair device, which can be a virtual device and applied to speaker equipment.

[0137] The following is combined with Figure 6 The functional module diagram shown illustrates the distortion repair device provided in this embodiment in detail. The device may include:

[0138] The data acquisition module is used to acquire a pre-stored voltage when controlling the speaker of the speaker device to work; wherein the pre-stored voltage is a DC voltage obtained by the speaker device during factory testing based on the detected total harmonic distortion value and a preset threshold range;

[0139] A distortion correction module is used to couple the pre-stored voltage to the input terminal of the speaker so that the voice coil of the speaker operates at the center balanced position of the magnetic circuit assembly of the speaker.

[0140] Furthermore, the device may also include:

[0141] The voltage calibration module is used to acquire and store pre-stored voltages.

[0142] Specifically, the voltage calibration module may include:

[0143] The first detection unit is used to obtain a first distortion value when the speaker device is subjected to factory testing. The first distortion value is the total harmonic distortion value of the speaker device when it is first tested in a preset frequency band.

[0144] A first calibration unit is used to determine a first calibration voltage when the first distortion value is not within a preset threshold range. The preset threshold range is set according to the preset frequency band, and the first calibration voltage is a DC voltage of a preset value.

[0145] The first repair unit is used to couple the first calibration voltage to the loudspeaker to obtain a second distortion value, wherein the second distortion value is the total harmonic distortion value of the speaker device when it is tested in the preset frequency band after the first calibration;

[0146] A voltage determination unit is configured to determine the first calibration voltage as the pre-stored voltage if the second distortion value is within the preset threshold range;

[0147] A data storage unit is used to store the pre-stored voltage.

[0148] Furthermore, the voltage calibration module may also include:

[0149] The first jump unit is used to determine the pre-stored voltage as zero and jump to execute the step of storing the pre-stored voltage when the first distortion value is within a preset threshold range;

[0150] Correspondingly, the device may also include:

[0151] The data judgment module is used to determine whether the pre-stored voltage is zero; if the pre-stored voltage is zero, the speaker is controlled to work normally; if the pre-stored voltage is not zero, the step of coupling the pre-stored voltage to the input terminal of the speaker is executed so that the voice coil of the speaker works at the center balance position of the magnetic circuit assembly of the speaker.

[0152] Furthermore, the voltage calibration module may also include:

[0153] The first judgment unit is used to determine whether the second distortion value is less than the first distortion value;

[0154] The first step unit is used to determine the first calibration step size based on the first calibration voltage if the second distortion value is greater than or equal to the first distortion value, wherein the first calibration step size is negative.

[0155] The second calibration unit is used to obtain a second calibration voltage based on the first calibration voltage and the first calibration step size, wherein the second calibration voltage is a DC voltage after updating the voltage magnitude;

[0156] The second repair unit is used to couple the second calibration voltage to the speaker to obtain a third distortion value, wherein the third distortion value is the total harmonic distortion value of the speaker device after secondary calibration and testing in the preset frequency band;

[0157] The voltage determination unit is further configured to, if the third distortion value is within the preset threshold range, determine the second calibration voltage as the pre-stored voltage and jump to execute the step of storing the pre-stored voltage; if the third distortion value is not within the preset threshold range, return to the step of obtaining the second calibration voltage based on the first calibration voltage and the first calibration step size, so as to obtain a new second calibration voltage based on the second calibration voltage and the first calibration step size, until the third distortion value is within the preset threshold range.

[0158] Furthermore, the voltage calibration module may also include:

[0159] The second judgment unit is used to further determine whether the second distortion value is within the preset threshold range if the second distortion value is less than the first distortion value.

[0160] The voltage determination unit is further configured to perform the step of determining the first calibration voltage as the pre-stored voltage if the second distortion value is within the preset threshold range;

[0161] The second step unit is used to determine the second calibration step size based on the first calibration voltage if the second distortion value is not within the preset threshold range, wherein the second calibration step size is a positive value.

[0162] The second calibration unit is further configured to obtain the second calibration voltage based on the first calibration voltage and the second calibration step size, and to perform the step of coupling the second calibration voltage to the speaker to obtain the third distortion value.

[0163] Furthermore, the voltage determination unit is also used for:

[0164] If the third distortion value is not within the preset threshold range, then determine the current calibration count; determine whether the calibration count exceeds the preset threshold; if the calibration count does not exceed the preset threshold, return to the step of obtaining the second calibration voltage based on the first calibration voltage and the first calibration step size, so as to obtain a new second calibration voltage based on the second calibration voltage and the first calibration step size, until the third distortion value is within the preset threshold range; if the calibration count exceeds the preset threshold, then indicate calibration failure and the pre-stored failure reason.

[0165] It should be noted that the functions and corresponding technical effects of each module in the distortion repair device provided in this embodiment can be referred to the description of the specific implementation methods in the various embodiments of the distortion repair method of the present invention. For the sake of brevity, they will not be repeated here.

[0166] Example 5

[0167] Based on the same inventive concept, referring to Figure 2 The hardware structure diagram shows that this embodiment provides a speaker device, which may include a processor and a memory. The memory stores a distortion repair program. When the distortion repair program is executed by the processor, it implements all or part of the steps of the various embodiments of the distortion repair method of the present invention.

[0168] Specifically, a speaker device refers to a device that can play sound. Speaker devices can be terminal devices such as mobile phones, computers, tablets, and embedded industrial control computers, or component devices such as speakers and loudspeakers.

[0169] Those skilled in the art will understand that Figure 2 The hardware structure shown does not constitute a limitation on the speaker device of the present invention. It may include more or fewer components than shown, or combine certain components, or have different component arrangements. For example, the speaker device may also include a communication bus, a user interface, and a network interface. The communication bus is used to enable communication between these components; the user interface is used to connect to a client and communicate data with the client, and the user interface may include output units such as a display screen and input units such as a keyboard; the network interface is used to connect to a backend server and communicate data with the backend server, and the network interface may include input / output interfaces, such as standard wired interfaces and wireless interfaces.

[0170] Memory is used to store various types of data, which may include, for example, instructions for any application or method in the speaker device, as well as application-related data. Memory can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as Static Random Access Memory (SRAM), Random Access Memory (RAM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read-Only Memory (EPROM), Programmable Read-Only Memory (PROM), Read-Only Memory (ROM), magnetic storage, flash memory, magnetic disk or optical disk. Optionally, memory can also be a processor-independent storage device.

[0171] The processor is used to call the distortion repair program stored in the memory and execute the distortion repair method as described above. The processor can be an application-specific integrated circuit (ASIC), a digital signal processor (DSP), a digital signal processing device (DSPD), a programmable logic device (PLD), a field-programmable gate array (FPGA), a controller, a microcontroller, a microprocessor, or other electronic components, and is used to execute all or part of the steps of the various embodiments of the distortion repair method described above.

[0172] Example 6

[0173] Based on the same inventive concept, this embodiment provides a computer-readable storage medium, such as flash memory, hard disk, multimedia card, card-type memory (e.g., SD or DX memory), random access memory (RAM), static random access memory (SRAM), read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), magnetic memory, disk, optical disk, server, etc. The storage medium stores a computer program, which can be executed by one or more processors. When the computer program is executed by the processor, it can implement all or part of the steps of the various embodiments of the distortion repair method of the present invention.

[0174] It should be noted that the sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments. The above embodiments are only optional embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made under the inventive concept of the present invention using the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are all included within the patent protection scope of the present invention.

Claims

1. A distortion repair method characterized by, Applied to speaker devices, the method includes: When the speaker of the speaker device is controlled to work, a pre-stored voltage is acquired; wherein, the pre-stored voltage is a DC voltage obtained by the speaker device during factory testing based on the detected total harmonic distortion value and a preset threshold range, the preset threshold range is set according to a preset frequency band, and the preset frequency band is a test frequency band set according to the working frequency band of the corresponding batch of the speaker device; The pre-stored voltage is coupled to the input terminal of the speaker so that the voice coil of the speaker operates at the center balanced position of the speaker's magnetic circuit assembly; Before the step of obtaining the pre-stored voltage when controlling the speaker of the speaker device to operate, the method further includes: When the speaker device is subjected to factory testing, a first distortion value is obtained. The first distortion value is the total harmonic distortion value of the speaker device when tested in a preset frequency band. When the first distortion value is not within the preset threshold range, a first calibration voltage is determined. The preset threshold range is set according to the preset frequency band, and the first calibration voltage is a DC voltage of a preset value. The first calibration voltage is coupled to the loudspeaker to obtain a second distortion value, which is the total harmonic distortion value of the speaker device when tested in the preset frequency band; If the second distortion value is within the preset threshold range, the first calibration voltage is determined as the pre-stored voltage; Store the pre-stored voltage; After the step of obtaining the detected first distortion value, the method further includes: When the first distortion value is within a preset threshold range, the pre-stored voltage is determined to be zero, and the process jumps to the step of storing the pre-stored voltage. After the step of obtaining the pre-stored voltage when controlling the speaker of the speaker device to work, the method further includes: Determine whether the pre-stored voltage is zero; If the pre-stored voltage is zero, the speaker is controlled to operate normally; If the pre-stored voltage is not zero, then the step of coupling the pre-stored voltage to the input terminal of the speaker is performed so that the voice coil of the speaker operates at the center balanced position of the magnetic circuit assembly of the speaker.

2. The distortion repair method of claim 1, wherein, After the step of coupling the first calibration voltage to the loudspeaker to obtain the second distortion value, the method further includes: Determine whether the second distortion value is less than the first distortion value; If the second distortion value is greater than or equal to the first distortion value, then the first calibration step size is determined based on the first calibration voltage, and the first calibration step size is negative. The second calibration voltage is obtained based on the first calibration voltage and the first calibration step size; The second calibration voltage is coupled to the loudspeaker to obtain a third distortion value, which is the total harmonic distortion value of the speaker device when tested in the preset frequency band; If the third distortion value is within the preset threshold range, the second calibration voltage is determined as the pre-stored voltage, and the process jumps to the step of storing the pre-stored voltage. If the third distortion value is not within the preset threshold range, the step of obtaining the second calibration voltage based on the first calibration voltage and the first calibration step size is returned to obtain a new second calibration voltage based on the second calibration voltage and the first calibration step size, until the third distortion value is within the preset threshold range.

3. The distortion repair method as described in claim 2, characterized in that, After the step of determining whether the second distortion value is less than the first distortion value, the method further includes: If the second distortion value is less than the first distortion value, then it is further determined whether the second distortion value is within the preset threshold range; If the second distortion value is within the preset threshold range, then the step of determining the first calibration voltage as the pre-stored voltage is performed; If the second distortion value is not within the preset threshold range, then the second calibration step size is determined based on the first calibration voltage, and the second calibration step size is a positive value; Based on the first calibration voltage and the second calibration step size, the second calibration voltage is obtained, and the step of coupling the second calibration voltage to the speaker to obtain the third distortion value is performed.

4. The distortion repair method as described in claim 2, characterized in that, The step of returning to the step of obtaining the second calibration voltage based on the first calibration voltage and the first calibration step size if the third distortion value is not within the preset threshold range, to obtain a new second calibration voltage based on the second calibration voltage and the first calibration step size, until the third distortion value is within the preset threshold range, includes: If the third distortion value is not within the preset threshold range, then the current calibration count is determined; Determine whether the number of calibrations exceeds a preset threshold. If the number of calibrations does not exceed the preset threshold, the process returns to the step of obtaining the second calibration voltage based on the first calibration voltage and the first calibration step size, so as to obtain a new second calibration voltage based on the second calibration voltage and the first calibration step size, until the third distortion value is within the preset threshold range.

5. The distortion repair method as described in claim 4, characterized in that, After the step of determining whether the number of calibrations exceeds a preset threshold, the method further includes: If the number of calibration attempts exceeds the preset threshold, a calibration failure message will be displayed along with the pre-stored reason for the failure.

6. A distortion repair device, characterized in that, Applied to speaker devices, the device includes: The data acquisition module is used to acquire a pre-stored voltage when controlling the speaker of the speaker device to work; wherein, the pre-stored voltage is a DC voltage obtained by the speaker device during factory testing based on the detected total harmonic distortion value and a preset threshold range, the preset threshold range is set according to a preset frequency band, and the preset frequency band is a test frequency band set according to the working frequency band of the corresponding batch of the speaker device; A distortion correction module is used to couple the pre-stored voltage to the input terminal of the speaker so that the voice coil of the speaker operates at the center balanced position of the magnetic circuit assembly of the speaker; The distortion repair device also includes: Voltage calibration module, used to acquire and store pre-stored voltage; The voltage calibration module includes: The first detection unit is used to obtain a first distortion value when the speaker device is subjected to factory testing. The first distortion value is the total harmonic distortion value of the speaker device when tested in a preset frequency band. A first calibration unit is used to determine a first calibration voltage when the first distortion value is not within a preset threshold range. The preset threshold range is set according to the preset frequency band, and the first calibration voltage is a DC voltage of a preset value. A first repair unit is used to couple the first calibration voltage to the loudspeaker to obtain a second distortion value, wherein the second distortion value is the total harmonic distortion value of the speaker device when tested in the preset frequency band; A voltage determination unit is configured to determine the first calibration voltage as the pre-stored voltage if the second distortion value is within the preset threshold range; Data storage unit for storing the pre-stored voltage; The voltage calibration module also includes: The first jump unit is used to determine the pre-stored voltage as zero and jump to execute the step of storing the pre-stored voltage when the first distortion value is within a preset threshold range; The distortion repair device also includes: The data judgment module is used to determine whether the pre-stored voltage is zero; if the pre-stored voltage is zero, the speaker is controlled to work normally; if the pre-stored voltage is not zero, the step of coupling the pre-stored voltage to the input terminal of the speaker is executed so that the voice coil of the speaker works at the center balance position of the magnetic circuit assembly of the speaker.

7. A speaker device, characterized in that, The speaker device includes a processor and a memory, the memory storing a distortion repair program, which, when executed by the processor, implements the distortion repair method as described in any one of claims 1 to 5.

8. A computer-readable storage medium, characterized in that, The storage medium stores a computer program, which, when executed by one or more processors, implements the distortion repair method as described in any one of claims 1 to 5.

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