Sound production monomer, sound production module, electronic equipment and acceleration detection method

Abstract

The invention discloses a sound production monomer, a sound production module, electronic equipment and an acceleration detection method, and relates to the technical field of magnetoelectric conversion, the sound production monomer comprises a magnetic circuit system, a vibration system and a processing module, and the magnetic circuit system forms a magnetic gap; the vibration system comprises a voice coil and a diaphragm, the voice coil is located in the magnetic gap, and one end of the voice coil away from the magnetic gap is connected with the diaphragm; the processing module comprises a current acquisition unit and a processing unit, the current acquisition unit is connected to the voice coil, the current acquisition unit is used for acquiring current data in the voice coil and sending the current data to the processing unit, and the processing unit is used for acquiring the acceleration of the sounding monomer according to the current data. According to the invention, through cooperation of the voice coil and the processing module, an acceleration detection function is realized on the basis of an original sound production single body, so that an acceleration sensor does not need to be independently arranged, the internal space of the electronic equipment does not need to be occupied, the internal space layout of the electronic equipment is optimized, and the overall size of the electronic equipment is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of magnetoelectric conversion, and in particular to a sound-generating unit, a sound-generating module, an electronic device and an acceleration detection method. Background Art

[0002] With the development of science and technology, portable mobile electronic devices have more and more functions and have gradually become an indispensable part of people's lives. Among them, accelerometers, as an important component of these devices, have greatly expanded their usage scenarios and functions, and achieved smarter and more natural interaction between devices and users.

[0003] However, portable mobile electronic devices in the prior art are also developing towards being lightweight and thin. Although the provision of an acceleration sensor can improve the functionality of the electronic device, it will occupy the internal space of the electronic device and increase the overall volume of the electronic device. Summary of the invention

[0004] The main purpose of the present invention is to propose a sound unit, a sound module, an electronic device and an acceleration detection method, aiming to solve the problem in the prior art that installing an acceleration sensor in an electronic device will occupy the internal space of the electronic device and increase the overall volume of the electronic device.

[0005] To achieve the above object, the sound-emitting unit proposed in the present invention comprises:

[0006] A magnetic circuit system, wherein the magnetic circuit system is formed with a magnetic gap;

[0007] A vibration system, the vibration system comprising a voice coil and a diaphragm, the voice coil being located in the magnetic gap, and one end of the voice coil away from the magnetic gap being connected to the diaphragm;

[0008] A processing module, the processing module includes a current collection unit and a processing unit, the current collection unit is connected to the voice coil, the voice coil is configured to vibrate with the diaphragm when the sound unit shakes when the power is cut off from the external circuit, so as to cut the magnetic flux lines in the magnetic gap to generate current, the current collection unit is used to collect current data when the voice coil is disconnected from the external circuit and send it to the processing unit, and the processing unit is used to obtain the acceleration of the sound unit according to the current data.

[0009] In one embodiment, the current collection unit is located outside the magnetic circuit system, and the current collection unit is connected to the voice coil via a connecting line passing through the magnetic circuit system.

[0010] In one embodiment, the processing module further includes a current amplifying unit, the current collecting unit sends the current data to the current amplifying unit for amplification, and the current amplifying unit sends the amplified current data to the processing unit.

[0011] The present invention also provides a sound module, which includes a shell and the above-mentioned sound unit arranged in the shell.

[0012] The present invention further provides an electronic device, comprising a protective shell and the above-mentioned sound module arranged in the protective shell.

[0013] The present invention also provides an acceleration detection method, which is applied to the above-mentioned sound-generating unit, and the acceleration detection method comprises the following steps:

[0014] When the voice coil and the external circuit are powered off, the sound unit is shaken to make the diaphragm shake and drive the voice coil to vibrate along the magnetic gap to cut the magnetic flux lines, so that current is generated in the voice coil;

[0015] Collecting the current data of the current generated in the voice coil by the current collecting unit, and sending the current data to the processing unit;

[0016] The processing unit obtains the acceleration of the sound unit according to the current data.

[0017] In one embodiment, the current data is a current value; when the voice coil is powered off from the external circuit, before the step of shaking the sound unit, the method further includes:

[0018] Conducting a preliminary experiment on the sound-generating unit to obtain an acceleration comparison table, wherein the acceleration comparison table includes a plurality of current values ​​of the voice coil and the acceleration of the sound-generating unit corresponding to each of the current values;

[0019] The step of the processing unit acquiring the acceleration of the sound generating unit according to the current data comprises:

[0020] The processing unit compares the current data with the acceleration comparison table to obtain the acceleration of the sound unit corresponding to the current data.

[0021] In one embodiment, the step of performing a preliminary experiment on the sound-emitting unit to obtain an acceleration comparison table includes:

[0022] Providing an accelerometer, wherein the accelerometer has a plurality of different acceleration values;

[0023] Shaking the sound-emitting unit with an acceleration value in the accelerometer;

[0024] Collecting the current data of the current generated in the voice coil by the current collection unit, inputting the current data into the accelerometer and making the current data correspond to the acceleration value;

[0025] Return to the step of shaking the sound-emitting unit with one of the acceleration values ​​in the acceleration table until all the acceleration values ​​in the acceleration comparison table correspond to one of the current data, and obtain the acceleration comparison table.

[0026] In one embodiment, when the processing module includes a current amplifying unit, the step of collecting the current data of the current in the voice coil by the current collecting unit and sending the current data to the processing unit includes:

[0027] Collecting the current data of the current generated in the voice coil by the current collection unit;

[0028] The current acquisition unit sends the current data to the current amplification unit, and the current amplification unit amplifies the current data;

[0029] The current amplifying unit sends the amplified current data to the processing unit.

[0030] In one embodiment, the step of the processing unit acquiring the acceleration of the sound generating unit according to the current data includes:

[0031] The processing unit compares the amplified current data with a set threshold value;

[0032] If the amplified current data is greater than or equal to the set threshold, the processing unit determines that the amplified current data is valid data, and obtains the acceleration of the sound unit according to the amplified current data;

[0033] If the amplified current data is less than the set threshold, the processing unit determines that the amplified current data is invalid data and stops acquiring the acceleration of the sound unit.

[0034] The technical solution of the present invention is to set a voice coil in the magnetic gap of the sound-generating unit. When the sound-generating unit shakes and generates acceleration, the diaphragm shakes and drives the voice coil to cut the magnetic field generated by the magnetic circuit system, thereby generating current in the voice coil. The current acquisition module collects the current data in the voice coil and sends it to the processing unit. The processing unit obtains the acceleration of the sound-generating unit according to the current data, thereby realizing the function of the acceleration sensor. The present invention realizes the function of acceleration detection on the basis of the original sound-generating unit through the cooperation of the voice coil and the processing module, so there is no need to set up an additional acceleration sensor and occupy the internal space of the electronic device. The sound-generating unit is almost a necessary component of the electronic device with sound requirements, so it will not occupy the internal space of the electronic device, thereby optimizing the internal space layout of the electronic device, reducing the overall volume of the electronic device, and at the same time increasing the functionality and applicability of the sound-generating unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0036] Figure 1 A schematic diagram of the structure of the sound-generating unit provided by the present invention;

[0037] Figure 2 A flowchart of an acceleration detection method provided by an embodiment of the present invention;

[0038] Figure 3 A flowchart of an acceleration detection method provided by another embodiment of the present invention;

[0039] Figure 4 A detailed flowchart of step S90 of an acceleration detection method provided by another embodiment of the present invention;

[0040] Figure 5 A detailed flowchart of step S200 of the acceleration detection method provided in one embodiment of the present invention;

[0041] Figure 6 This is a detailed flowchart of step S300 of the acceleration detection method provided in one embodiment of the present invention.

[0042] Description of Figure Numbers:

[0043] 100. Sound-generating unit; 1. Magnetic circuit system; 11. Magnetic gap; 2. Vibration system; 21. Voice coil; 22. Diaphragm; 3. Processing module; 31. Current acquisition unit; 32. Processing unit; 33. Connecting wire; 34. Current amplification unit.

[0044] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0047] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0048] Portable mobile electronic devices in the prior art are also developing towards being lighter and thinner. Although adding an acceleration sensor can improve the functionality of the electronic device, it will occupy the internal space of the electronic device and increase the overall volume of the electronic device.

[0049] In order to solve the above problems, the present invention provides a sound unit 100 .

[0050] See also Figure 1The sound unit 100 of this embodiment includes a magnetic circuit system 1, a vibration system 2 and a processing module 3. The magnetic circuit system 1 forms a magnetic gap 11; the vibration system 2 includes a voice coil 21 and a diaphragm 22. The voice coil 21 is located in the magnetic gap 11, and the end of the voice coil 21 away from the magnetic gap 11 is connected to the diaphragm 22; the processing module 3 includes a current acquisition unit 31 and a processing unit 32. The current acquisition unit 31 is connected to the voice coil 21. The voice coil 21 is configured to vibrate with the diaphragm 22 when the sound unit 100 is shaken when the power is cut off from the external circuit, so as to cut the magnetic flux lines in the magnetic gap 11 to generate current. The current acquisition unit 31 is used to collect current data when the voice coil 21 is disconnected from the external circuit and send it to the processing unit 32. The processing unit 32 is used to obtain the acceleration of the sound unit 100 according to the current data.

[0051] It can be understood that based on Faraday's law of electromagnetic induction, when a conductor moves in a magnetic field to cut magnetic flux lines, the free charges in the conductor will be acted upon by the Lorentz force and move in a directional manner, thereby forming a potential difference at both ends of the conductor, i.e., a motional electromotive force. The magnitude of the motional electromotive force can be expressed by the formula E=BLv, where E is the motional electromotive force, B is the magnetic flux density, L is the effective length of the conductor in the magnetic field, and v is the speed of the conductor moving perpendicular to the direction of the magnetic flux lines. This formula intuitively reflects the relationship between the motional electromotive force and the magnetic field, the length of the conductor and the speed of movement. In the loudspeaker, a fixed magnetic field is generated in the magnetic circuit system 1, and its magnetic flux density B remains unchanged. The conductor that cuts the magnetic field is the voice coil 21, and its length L remains unchanged. The motional electromotive force will change with the change of the speed v, so we capture the magnitude of the motional electromotive force to judge the magnitude of the acceleration. Under the condition of constant temperature, the current generated in the conductor is proportional to the electromotive force applied to its two ends I=E / R. In summary, it is only necessary to collect the current in the voice coil 21 to judge the acceleration of the sound-generating unit 100.

[0052] It should be noted that the acceleration detection function can be realized when the sound unit 100 of the present invention does not perform the sound-generating function, that is, the voice coil 21 is powered off from the external circuit. Because when the sound unit 100 itself makes a sound, the voice coil 21 is connected to the external circuit and energized, and as an active component, it vibrates continuously in the magnetic gap 11 to drive the diaphragm 22 to make a sound. At this time, the movement of the voice coil 21 caused by acceleration and the current generated by the shaking of the voice coil 21 can be ignored, so it cannot be used for acceleration detection.

[0053] The technical solution of the present invention is to set a voice coil 21 in the magnetic gap 11 of the sound-generating monomer 100. When the sound-generating monomer 100 shakes and generates acceleration, the diaphragm 22 shakes and drives the voice coil 21 to cut the magnetic field generated by the magnetic circuit system 1, thereby generating a current in the voice coil 21. The current acquisition module collects the current data in the voice coil 21 and sends it to the processing unit 32. The processing unit 32 obtains the acceleration of the sound-generating monomer 100 according to the current data, thereby realizing the function of the acceleration sensor. The present invention realizes the function of acceleration detection on the basis of the original sound-generating monomer 100 through the cooperation of the voice coil 21 and the processing module 3, so there is no need to set up an additional acceleration sensor, and there is no need to occupy the internal space of the electronic device. The sound-generating monomer 100 is almost a necessary device for electronic devices with sound generation requirements, so it does not occupy additional internal space of the electronic device, thereby optimizing the internal space layout of the electronic device, reducing the overall volume of the electronic device, and at the same time increasing the functionality and applicability of the sound-generating monomer 100.

[0054] In one embodiment, the current collection unit 31 is located outside the magnetic circuit system, and the current collection unit 31 is connected to the voice coil 21 through a connecting wire 33 that passes through the magnetic circuit system 1, one end of the connecting wire 33 passes through the magnetic circuit system 1 and is connected to the voice coil 21, and the other end of the connecting wire 33 extends out of the sound-generating monomer 100. The current collection unit 31 is connected to the voice coil 21 through the connecting wire 33, rather than being arranged in the magnetic gap 11, so that the current collection unit 31 can avoid affecting the normal vibration of the voice coil 21 when it is sounding, and ensure that the acceleration detection function is provided without affecting the sound-generating function of the sound-generating monomer 100 itself.

[0055] In one embodiment, the processing module 3 further includes a current amplifying unit 34. The current collecting unit 31 sends the current data to the current amplifying unit 34 for amplification, and the current amplifying unit 34 sends the amplified current data to the processing unit 32. The induced current generated by the voice coil 21 cutting the magnetic flux lines is usually very small and has a low signal level. If it is directly sent to the processing unit 32, it may be difficult to be effectively detected and may even be drowned in the background noise. The weak signal is enhanced to a higher level by the current amplifying unit 34 to ensure that the processing unit 32 can accurately identify and analyze it, thereby improving the accuracy of the acceleration detection of the sound unit 100.

[0056] The present invention also provides a sound module, which includes a housing and the above-mentioned sound unit 100 disposed in the housing. The specific structure of the sound unit 100 refers to the above-mentioned embodiment. Since the present sound module adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0057] The present invention also provides an electronic device, the electronic device comprising a protective shell and the above-mentioned sound module disposed in the protective shell. The specific structure of the sound module refers to the above-mentioned embodiment. Since the electronic device adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0058] Please combine Figure 1 and Figure 2 The present invention also provides an acceleration detection method, which is applied to the above-mentioned sound-emitting unit. The acceleration detection method comprises the following steps:

[0059] S100: When the voice coil and the external circuit are powered off, shaking the sound unit, so that the diaphragm shakes and drives the voice coil to vibrate along the magnetic gap to cut the magnetic flux lines, so that current is generated in the voice coil;

[0060] According to the characteristics of the sound-generating monomer 100, when the sound-generating monomer 100 is shaken by the outside world and an acceleration is applied, the diaphragm 22 will also generate acceleration, driving the voice coil 21 to move, thereby cutting the magnetic field lines of force, generating motional electromotive force, and thus generating current;

[0061] S200: collecting the current data of the current generated in the voice coil through the current collection unit, and sending the current data to the processing unit;

[0062] It is understandable that the current acquisition unit 31 may use a current sensor that is already mature in the prior art, which is not limited here;

[0063] S300: The processing unit obtains the acceleration of the sound unit according to the current data.

[0064] The current acquisition module collects the current data in the voice coil 21 and sends it to the processing unit 32. The processing unit 32 obtains the acceleration of the sound unit 100 according to the current data, thereby realizing the function of the acceleration sensor. The present invention realizes the function of acceleration detection on the basis of the original sound unit 100 through the cooperation of the voice coil 21 and the processing module 3, so there is no need to set up an acceleration sensor separately, and there is no need to occupy the internal space of the electronic device. The sound unit 100 is an almost necessary device for electronic devices, so it does not occupy additional internal space of the electronic device, thereby optimizing the internal space layout of the electronic device, reducing the overall volume of the electronic device, and at the same time increasing the functionality and applicability of the sound unit 100.

[0065] See also Figure 3 In one embodiment, the current data is a current value, and before step S100, the following steps are further included:

[0066] S90: performing a preliminary experiment on the sound unit to obtain an acceleration comparison table, wherein the acceleration comparison table includes a plurality of current values ​​of the voice coil and the acceleration of the sound unit corresponding to each of the current values;

[0067] Step S300 includes:

[0068] S310a: The processing unit compares the current data with the acceleration comparison table to obtain the acceleration of the sound unit corresponding to the current data.

[0069] By conducting a preliminary experiment on the sound unit 100 to obtain an acceleration comparison table, and storing the acceleration comparison table in the processing unit 32, the processing unit 32 can obtain the acceleration of the sound unit 100 by performing a simple search and comparison operation without the need to obtain the acceleration through complex calculations. This allows the processing unit 32 to use a processor with simpler functions. On the one hand, the size of the processing unit 32 can be reduced, thereby further reducing the space occupied by the sound unit 100 in the electronic device. On the other hand, the cost of the processing unit 32 can also be reduced.

[0070] See also Figure 4 Specifically, step S90 includes:

[0071] S91: providing an accelerometer, wherein the accelerometer has a plurality of different acceleration values;

[0072] The accelerometer has multiple possible acceleration values;

[0073] S92: shaking the sound-emitting unit according to the acceleration value in the acceleration table;

[0074] The sound unit 100 is driven according to any acceleration value in the accelerometer, so that the sound unit 100 shakes at the acceleration, drives the voice coil 21 to shake according to the acceleration, and generates current in the voice coil 21;

[0075] S93: collecting the current data of the current generated in the voice coil through the current collection unit, inputting the current data into the accelerometer and making the current data correspond to the acceleration value;

[0076] The current data generated by the voice coil 21 under the acceleration corresponds to the acceleration, so that the acceleration value can be found through the current data correspondence later;

[0077] S94: Return to step S92 until all acceleration values ​​in the acceleration comparison table correspond to one current data, thereby obtaining the acceleration comparison table.

[0078] The sound-emitting unit 100 is driven according to another acceleration value in the accelerometer, and the generated current data corresponds to the acceleration value, and then step S92 is executed again. An acceleration value is replaced each time step S92 is executed until the current data corresponding to all acceleration values ​​are detected and input into the accelerometer, thereby forming an acceleration comparison table.

[0079] See also Figure 5 In one embodiment, when the processing module includes a current amplifying unit, step S200 includes:

[0080] S210: Collecting the current data of the current generated in the voice coil by the current collection unit;

[0081] S220: The current acquisition unit sends the current data to the current amplification unit, and the current amplification unit amplifies the current data;

[0082] S230: The current amplifying unit sends the amplified current data to the processing unit.

[0083] The induced current generated by the voice coil 21 cutting the magnetic flux lines is usually very small and has a low signal level. If it is sent directly to the processing unit, it may be difficult to be effectively detected and may even be drowned in the background noise. The weak signal is enhanced to a higher level through the current amplification unit to ensure that the processing unit can accurately identify and analyze it, thereby improving the accuracy of the sound unit in accelerating the detection.

[0084] See also Figure 6 , further, step S300 includes:

[0085] S310b: the processing unit compares the amplified current data with a set threshold;

[0086] The application of acceleration sensors in electronic devices includes different functions such as screen wake-up, screen rotation, step recording, and somatosensory operation. However, some of these functions have trigger thresholds to avoid false touches. Therefore, the amplified current data is compared with the set threshold to avoid false touches.

[0087] S320b: If the amplified current data is greater than or equal to the set threshold, the processing unit determines that the amplified current data is valid data, and obtains the acceleration of the sound unit according to the amplified current data;

[0088] S330b: If the amplified current data is less than the set threshold, the processing unit determines that the amplified current data is invalid data, and stops acquiring the acceleration of the sound unit.

[0089] If the amplified current data is greater than or equal to the set threshold, it means that the operation under this acceleration is a valid operation. The processing unit 32 obtains the acceleration of the sound unit 100 and outputs it to the controller of the electronic device. The controller of the electronic device performs subsequent operations according to the acceleration. Conversely, if the amplified current data is less than the set threshold, it means that the operation under this acceleration is a false touch. The processing unit 32 does not obtain the acceleration to avoid false touches and ensure the stability of the operation of the electronic device.

[0090] The above descriptions are only optional embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A sound-emitting unit, characterized in that: include: A magnetic circuit system, wherein the magnetic circuit system is formed with a magnetic gap; A vibration system, the vibration system comprising a voice coil and a diaphragm, the voice coil being located in the magnetic gap, and one end of the voice coil away from the magnetic gap being connected to the diaphragm; A processing module, the processing module includes a current collection unit and a processing unit, the current collection unit is connected to the voice coil, the voice coil is configured to vibrate with the diaphragm when the sound unit shakes when the power is cut off from the external circuit, so as to cut the magnetic flux lines in the magnetic gap to generate current, the current collection unit is used to collect current data when the voice coil is disconnected from the external circuit and send it to the processing unit, and the processing unit is used to obtain the acceleration of the sound unit according to the current data.

2. The sound-emitting unit according to claim 1, characterized in that: The current collection unit is located outside the magnetic circuit system, and the current collection unit is connected to the voice coil via a connecting line passing through the magnetic circuit system.

3. The sound-emitting unit according to claim 1, characterized in that: The processing module further includes a current amplifying unit. The current collecting unit sends the current data to the current amplifying unit for amplification. The current amplifying unit sends the amplified current data to the processing unit.

4. A sound module, characterized in that: The sound module comprises a housing and a sound unit as claimed in any one of claims 1 to 3 arranged in the housing.

5. An electronic device, characterized in that: The electronic device comprises a protective shell and a sound module as claimed in claim 4 arranged in the protective shell.

6. A method for detecting acceleration, characterized in that: Applied to the sound-emitting unit according to any one of claims 1 to 3, the acceleration detection method comprises the following steps: When the voice coil and the external circuit are powered off, the sound unit is shaken to make the diaphragm shake and drive the voice coil to vibrate along the magnetic gap to cut the magnetic flux lines, so that current is generated in the voice coil; Collecting the current data of the current generated in the voice coil by the current collecting unit, and sending the current data to the processing unit; The processing unit obtains the acceleration of the sound unit according to the current data.

7. The acceleration detection method according to claim 6, characterized in that: The current data is a current value; When the voice coil is powered off from the external circuit, before the step of shaking the sound unit, the method further includes: Conducting a preliminary experiment on the sound-generating unit to obtain an acceleration comparison table, wherein the acceleration comparison table includes a plurality of current values ​​of the voice coil and the acceleration of the sound-generating unit corresponding to each of the current values; The step of the processing unit acquiring the acceleration of the sound generating unit according to the current data comprises: The processing unit compares the current data with the acceleration comparison table to obtain the acceleration of the sound unit corresponding to the current data.

8. The acceleration detection method according to claim 7, characterized in that: The steps of conducting a preliminary experiment on the sound-generating unit and obtaining an acceleration comparison table include: Providing an accelerometer, wherein the accelerometer has a plurality of different acceleration values; Shaking the sound-generating unit with an acceleration value in the accelerometer; Collecting the current data of the current generated in the voice coil by the current collection unit, inputting the current data into the accelerometer and making the current data correspond to the acceleration value; Return to the step of shaking the sound-emitting unit with one of the acceleration values ​​in the acceleration table until all the acceleration values ​​in the acceleration comparison table correspond to one of the current data, and obtain the acceleration comparison table.

9. The acceleration detection method according to claim 6, characterized in that: When the processing module includes a current amplifying unit, the step of collecting the current data of the current in the voice coil by the current collecting unit and sending the current data to the processing unit includes: Collecting the current data of the current generated in the voice coil by the current collection unit; The current acquisition unit sends the current data to the current amplification unit, and the current amplification unit amplifies the current data; The current amplifying unit sends the amplified current data to the processing unit.

10. The acceleration detection method according to claim 9, characterized in that: The step of the processing unit acquiring the acceleration of the sound generating unit according to the current data comprises: The processing unit compares the amplified current data with a set threshold value; If the amplified current data is greater than or equal to the set threshold, the processing unit determines that the amplified current data is valid data, and obtains the acceleration of the sound unit according to the amplified current data; If the amplified current data is less than the set threshold, the processing unit determines that the amplified current data is invalid data and stops acquiring the acceleration of the sound unit.

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