Vibrator assembly, target object and noise reduction method

Abstract

The present invention relates to an exciter assembly, a target object and a noise reduction method. The exciter assembly comprises a first connecting part, a second connecting part, a first magnetic module and a second magnetic module; the first connecting part is connected to a first component, and the second connecting part is connected to a second component; the first magnetic module is arranged on the first connecting part, and the second magnetic module is arranged on the second connecting part; at least one of the first magnetic module and the second magnetic module is an electromagnetic module, and by controlling the power supply of the electromagnetic module, the first magnetic module and the second magnetic module can be attracted or repelled, and the first connecting part and the second connecting part can move relative to each other, thereby causing the first component and the second component of a vehicle to vibrate, so as to adjust the noise of the vehicle and improve the riding comfort.

Description

Technical Field

[0001] The present invention belongs to the technical field of noise reduction, and in particular relates to an exciter component, a target object and a noise reduction method. Background Art

[0002] When a vehicle is driving, noise will be generated inside the car due to factors such as road excitation, which will reduce the passenger experience.

[0003] In the prior art, the common methods to reduce vehicle body excitation are:

[0004] (1) The isolation rate is increased by bushings to reduce the excitation transmitted to the vehicle body.

[0005] (2) Reduce body response by strengthening the body structure.

[0006] However, the existing methods for reducing vehicle body excitation cannot effectively reduce vehicle body excitation (vehicle body load force), and the noise reduction effect is limited. Summary of the invention

[0007] The technical problem to be solved by the present invention is: to provide an exciter assembly, a target object and a noise reduction method in view of the problem that the existing method for reducing vehicle body excitation has limited noise reduction effect.

[0008] In order to solve the above problems, an embodiment of the present invention provides an exciter assembly, including a first connecting part, a second connecting part, a first magnetic module and a second magnetic module; the first connecting part is used to connect with a first component of a target object, and the second connecting part is used to connect with a second component of the target object; the first magnetic module is arranged on the first connecting part, and the second magnetic module is arranged on the second connecting part; at least one of the first magnetic module and the second magnetic module is an electromagnetic module, and by controlling the power supply status of the electromagnetic module, the first magnetic module and the second magnetic module can be attracted or repelled to drive the first connecting part and the second connecting part to produce relative movement, so that vibration is generated between the first component and the second component of the target object to adjust the noise of the target object.

[0009] Optionally, the first connecting portion has a first surface and a second surface arranged opposite to each other, and the first connecting portion is also provided with an assembly hole extending from the first surface to the second surface, and the first magnetic module is arranged in the assembly hole; the second connecting portion includes a movable shaft for connecting to a second component of the target object, and the second magnetic module is arranged on the movable shaft; the movable shaft and the second magnetic module are arranged in the assembly hole, and by controlling the power supply status of the electromagnetic module, the movable shaft can be moved relative to the first connecting portion along the axial direction of the assembly hole.

[0010] Optionally, the second magnetic module is an electromagnetic module, the first magnetic module includes a plurality of magnets, the plurality of magnets are arranged on the outside of the second magnetic module, and the plurality of magnets are evenly arranged around the axis of the assembly hole.

[0011] Optionally, a slot is provided on the inner side wall of the assembly hole, and the magnet is snapped into the slot.

[0012] Optionally, the slot extends from the first surface to the second surface, wherein the width of the slot gradually decreases along the direction from the first surface to the second surface; and the width of the magnet gradually decreases along the length direction of the magnet.

[0013] Optionally, the second connecting part also has a resisting structure, which is arranged on the movable shaft and located on the outside of the assembly hole. When the movable shaft moves axially along the assembly hole, the resisting structure can abut against the first connecting part; the first connecting part can move synchronously with the first part of the target object, and the resisting structure can move synchronously with the second part of the target object, so that a pressure change can be generated between the first connecting part and the resisting structure.

[0014] Optionally, the exciter assembly also includes a detection unit; the detection unit is used to detect the noise of the target object, so as to control the power supply status of the electromagnetic module according to the detection result of the detection unit, so that the first magnetic module and the second magnetic module attract or repel each other, and then the first connecting part and the second connecting part produce relative movement to adjust the noise of the target object.

[0015] Optionally, the detection unit includes a piezoelectric sensor, which is arranged between the first component and the second component of the target object and is used to detect pressure changes between the first component and the second component of the target object, so as to control the power supply status of the electromagnetic module according to the pressure change.

[0016] Optionally, the detection unit includes an audio receiving module, which is arranged on the target object and is used to detect noise audio of the target object, so as to control the power supply status of the electromagnetic module according to the noise audio, so that the first connecting part and the second connecting part move relative to each other, so as to apply excitation opposite to the pressure change to the first component and the second component of the target object.

[0017] In order to solve the above problems, an embodiment of the present invention further provides a target object, comprising a first component, a second component, a control device and an exciter assembly as described in any one of the above items; the first connecting part is connected to the first component, and the second connecting part is connected to the second component; the control device is connected to the detection unit and the electromagnetic module, respectively, and is used to control the power supply status of the electromagnetic module according to the detection result of the detection unit, so that the first connecting part and the second connecting part move relative to each other, so as to drive the first component and the second component of the target object to collide to generate compensation audio, thereby adjusting the noise of the target object.

[0018] Optionally, the target object is a vehicle, one of the first component and the second component is a body of the vehicle, and the other is a chassis of the vehicle.

[0019] In order to solve the above problems, an embodiment of the present invention further provides a noise reduction method, which is applied to any target object described above, comprising: receiving a detection result of the detection unit on the noise of the target object; according to the detection result, controlling the power supply of the electromagnetic module to make the first magnetic module and the second magnetic module attract or repel each other, thereby causing vibration between the first component and the second component to adjust the noise of the target object.

[0020] Optionally, the detection result includes a pressure change between the first connection part and the second connection part; the step of controlling the power-on condition of the electromagnetic module according to the detection result includes: controlling the power-on direction and power-on magnitude of the electromagnetic module according to the pressure change.

[0021] Optionally, the detection result includes noise audio of the target object; the step of controlling the power-on status of the electromagnetic module based on the detection result so that the first magnetic module and the second magnetic module attract or repel each other includes: performing octave processing on the noise audio to obtain a real-time noise curve; fitting the real-time noise characteristics to obtain a target noise curve; controlling the power-on status of the electromagnetic module to cause the first component and the second component to vibrate and collide to generate compensation audio; the compensation audio is used to reduce the difference between the target noise curve and the real-time noise curve.

[0022] Optionally, the real-time noise curve includes a plurality of real-time noise features arranged in sequence; the target noise curve includes a plurality of target noise features arranged in sequence; the frequency arrangement order of each target noise feature in the target noise curve is the same as the frequency arrangement order of each real-time noise feature in the real-time noise curve, the duration of each target noise feature is equal to the duration of the corresponding real-time noise feature, and the amplitude of each target noise feature is greater than the amplitude of the corresponding real-time noise feature; the compensation audio includes a plurality of compensation noise features arranged in sequence; the frequency arrangement order of each compensation noise feature in the compensation audio is the same as the frequency arrangement order of each real-time noise feature in the real-time noise curve, the duration of each compensation noise feature is equal to the duration of the corresponding real-time noise feature, and the amplitude of each compensation noise feature is equal to the difference between the amplitude of the corresponding target noise feature and the amplitude of the real-time noise feature.

[0023] When the vibration exciter assembly provided in the embodiment of the present invention is applied to an automobile, the noise condition of the vehicle can be detected by the detection unit, and then the first connection part and the second connection part can be driven to move relative to each other according to the noise condition of the vehicle, thereby causing the first component and the second component of the vehicle to vibrate to adjust the noise of the vehicle. For example, when the first component and the second component are the vehicle body and the chassis, respectively, the vibration exciter assembly can generate an anti-phase excitation force to actively reduce noise, which can fundamentally reduce the load force of the vehicle body, thereby improving the noise reduction effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic structural diagram of a vibration exciter assembly provided by an embodiment of the present invention;

[0025] Figure 2 is a schematic diagram of a cross section of a vibration exciter assembly provided by an embodiment of the present invention;

[0026] Figure 3 is a schematic diagram of the cooperation between the second connecting portion and the cover plate of the vibration exciter assembly provided by one embodiment of the present invention;

[0027] Figure 4 is a schematic diagram of a first connecting portion of a vibration exciter assembly provided by an embodiment of the present invention;

[0028] Figure 5 Schematic diagram of a magnet of an exciter assembly provided by an embodiment of the present invention Figure 1 ;

[0029] Figure 6 Schematic diagram of a magnet of an exciter assembly provided by an embodiment of the present invention Figure 2 ;

[0030] Figure 7It is a partial view of the slot of the exciter assembly provided in one embodiment of the present invention.

[0031] The reference numerals in the specification are as follows:

[0032] 100. Vibrator assembly; 10. Detection unit; 1. First connecting portion; 11. First surface; 12. Second surface; 13. Assembly hole; 14. Main structure; 15. Connection structure; 16. Connection hole; 17. Slot; 2. Second connecting portion; 21. Moving axis; 22. Mounting hole; 23. Resisting structure; 3. First magnetic module; 31. Magnet; 4. Second magnetic module; 5. Cover; 101. Piezoelectric sensor. DETAILED DESCRIPTION

[0033] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0034] like Figure 1 As shown, in one embodiment, the target object includes an exciter assembly 100, a first component, a second component, and a control device. The exciter assembly 100 is connected to the target object, wherein the exciter assembly 100 also includes a detection unit 10, the exciter assembly 100 is respectively connected to the first component and the second component of the target object, the detection unit 10 can detect the noise of the target object, and the control device can drive the exciter to work according to the detection result of the detection unit 10, thereby generating vibration between the first component and the second component to adjust the noise of the target object.

[0035] In addition, the target object may be a vehicle, etc. The implementation principle of the present solution is described below using a vehicle as an example. When the target object is a vehicle, one of the first component and the second component may be the body of the vehicle, and the other may be the chassis of the vehicle.

[0036] like Figure 1 and Figure 2As shown, in one embodiment, the exciter assembly 100 includes a first connection part 1, a second connection part 2, a first magnetic module 3 and a second magnetic module 4. The first connection part 1 is used to connect with a first component of a vehicle, and the second connection part 2 is used to connect with a second component of the vehicle; the first magnetic module 3 is arranged on the first connection part 1, and the second magnetic module 4 is arranged on the second connection part 2. At least one of the first magnetic module 3 and the second magnetic module 4 is an electromagnetic module. By controlling the power supply of the electromagnetic module, the first magnetic module 3 and the second magnetic module 4 can be attracted or repelled to drive the first connection part 1 and the second connection part 2 to produce relative movement, and at this time, vibration can be generated between the first component and the second component of the vehicle to adjust the noise of the vehicle.

[0037] The control device controls the power supply of the electromagnetic module, which may include controlling the direction and magnitude of the current flowing into the electromagnetic module, and may also include controlling whether the current flows into the electromagnetic module. In addition, in actual use, the first connecting part 1 is fixed on the first component so that the first connecting part 1 can move synchronously with the first component; the second connecting part 2 is fixed on the second component so that the second connecting part 2 can move synchronously with the second component.

[0038] like Figure 2 and Figure 3 As shown, in one embodiment, the first connection part 1 has a first surface 11 and a second surface 12 that are arranged opposite to each other, and an assembly hole 13 that runs from the first surface 11 to the second surface 12, and the first magnetic module 3 is arranged in the assembly hole 13. The second connection part 2 includes a moving shaft 21, and the moving shaft 21 is used to connect with the second component of the target object, and the second magnetic module 4 is arranged on the moving shaft 21. After assembly, the moving shaft 21 and the second magnetic module 4 are both arranged in the assembly hole 13, and the moving shaft 21 can be moved relative to the first connection part 1 along the axial direction of the assembly hole 13 by controlling the power supply of the electromagnetic module. By moving the moving shaft 21 relative to the first connection part 1 along the axial direction of the assembly hole 13, the relative movement between the first connection part 1 and the second connection part 2 can be made more controllable.

[0039] In addition, the first magnetic module 3 and the second magnetic module 4 can be contacted and limited to prevent the movable shaft 21 from moving relative to the first connecting portion 13 in the radial direction of the assembly hole 13, so that the movable shaft 21 can only move along the axial direction of the assembly hole 13, making the relative movement between the first connecting portion 1 and the second connecting portion 2 more controllable. Of course, in actual scenarios, the movable shaft 21 can also be limited in other ways so that the movable shaft 21 can only move along the axial direction of the assembly hole 13, such as by limiting the corresponding structure of the first connecting portion 1 and the second connecting portion 2 themselves, or by providing other limiting members on the first connecting portion 1 and the second connecting portion 2 for limiting the cooperation.

[0040] like Figures 2 to 4 As shown, in one embodiment, the first connecting part 1 includes a main structure 14 and a connecting structure 15, the main structure 14 is roughly annular, and the connecting structure 15 is arranged on the side wall of the main structure 14. Among them, the assembly hole 13 is the hollow part of the main structure 14, and the assembly hole 13 can be coaxial with the main structure 14. The first surface 11 and the second surface 12 are the upper and lower surfaces of the main structure 14 respectively. The connecting structure 15 is provided with a connecting hole 16, and the connecting hole 16 is a through hole. The first component is also provided with a corresponding through hole. At this time, after the bolt passes through the through hole of the connecting structure 15 and the through hole on the first component, the connecting structure 15 can be locked on the first component by matching with the corresponding nut, thereby realizing the connection and matching between the first connecting part 1 and the first component. In addition, there are multiple connecting structures 15, and they are evenly arranged around the axis of the main structure 14, so that the connection between the first connecting part 1 and the first component can be more stable. In addition, the connection between the connecting structure 15 and the main structure 14 adopts an arc transition, which can avoid stress concentration and improve the service life. It can be understood that in actual products, the connecting hole 16 can be designed as a threaded hole.

[0041] like Figure 2 and Figure 3 As shown, in one embodiment, a mounting hole 22 is provided on one end face of the movable shaft 21, wherein the mounting hole 22 can be a threaded hole. At this time, a corresponding through hole is provided on the second component. By passing a bolt through the threaded hole on the second component and cooperating with the mounting hole 22, the movable shaft 21 and the second component can be locked together, thereby enabling the second connecting portion 2 to be connected and cooperated with the second component.

[0042] In one embodiment, the first magnetic module 3 is a permanent magnetic module, the second magnetic module 4 is an electromagnetic module, and the second magnetic module 4 is connected to the control device. The second magnetic module 4 can be an electromagnetic coil sleeved on the movable shaft 21, wherein the electromagnetic coil, the movable shaft 21 and the assembly hole 13 are coaxial, and the first magnetic module 3 is arranged outside the second magnetic module 4.

[0043] like Figure 5 and Figure 6 As shown, in one embodiment, the first magnetic module 3 includes a plurality of magnets 31, each of which is arranged outside the second magnetic module 4, and each of which is evenly arranged around the axis of the assembly hole 13. In actual products, the structure of each magnet 31 is the same, which is more convenient for production and can ensure that the magnetic field in the entire space is evenly distributed. In a specific embodiment, six magnets 31 are provided.

[0044] like Figure 4 and Figure 7As shown, in one embodiment, a slot 17 is provided on the inner side wall of the assembly hole 13, and the magnet 31 is engaged in the slot 17, wherein the slot 17 is provided on the inner side wall of the assembly hole 13 means that the slot 17 forms an opening on the inner surface of the side wall of the assembly hole 13, so that the slot 17 is connected to the assembly hole 13.

[0045] like Figure 6 and Figure 7 As shown, in one embodiment, the slot 17 extends from the first surface 11 to the second surface 12, and at this time, the slot 17 forms an opening on the first surface 11. In addition, the width of the slot 17 gradually decreases along the direction from the first surface 11 to the second surface 12; along the length direction of the magnet 31, the width of the magnet 31 gradually decreases. During assembly, the end of the magnet 31 with a smaller width is first inserted into the slot 17 from the opening formed by the slot 17 on the first surface 11. During the insertion process, the slot 17 and the magnet 31 are gradually clamped together.

[0046] like Figure 4 and Figure 6 As shown, in one embodiment, the slot 17 is a trapezoidal slot, and the width of the trapezoidal slot gradually increases along the direction away from the axis of the assembly hole 13. At the same time, the magnet 31 is a trapezoidal block. After the magnet 31 is matched with the slot 17, the magnet 31 contacts the slot wall of the slot 17 to prevent the magnet from moving out of the slot 17 along the direction close to the axis of the assembly hole 13, thereby effectively preventing the magnet 31 from falling off.

[0047] like Figure 1 As shown, in one embodiment, the detection unit 10 includes a piezoelectric sensor 101, which is arranged between the first component and the second component of the target object, and is used to detect the pressure change between the first component and the second component of the target object, so as to control the power-on status of the electromagnetic module according to the pressure change, so as to make the first connecting part 1 and the second connecting part 2 move relative to each other, so as to apply an excitation opposite to the pressure change to the first component and the second component of the target object. Since the dynamic load force between the first component and the second component is the source of noise, the dynamic load force between the first component and the second component is monitored in real time by the piezoelectric sensor 101, and after calculating and analyzing the amplitude-frequency characteristics of the load force; an excitation force with an opposite phase is applied by the power-on status of the electromagnetic module, and the dynamic load force between the first component and the second component is offset with an opposite phase, so that the dynamic load force transmitted to the vehicle body can be greatly reduced, and finally the effect of more accurately controlling the noise reduction can be achieved from the source of noise generation.

[0048] In actual use, the piezoelectric sensor 101 can generate a corresponding electrical signal according to the change in pressure between the first component and the second component. The electrical signal will be transmitted to the control device. The control device can determine the change in pressure between the first component and the second component based on these electrical signals, and then control the power supply of the electromagnetic module according to this pressure change, so that the exciter produces reverse excitation, thereby achieving adjustment of the vehicle noise.

[0049] For example, when the second component is subjected to force F1 to approach the first component, the control device can determine the increase in pressure between the first component and the second component and the change in pressure between the two components based on the electrical signal input by the piezoelectric sensor 101. At this time, the control device controls the power-on status of the electromagnetic module to make the first connecting part 1 move relative to the second connecting part 2 so as to apply a force F2 to the second component, wherein the direction of F2 is opposite to the direction of F1, that is, the force generated by the relative movement of the first connecting part 1 and the second connecting part 2 can offset F1, thereby reducing the dynamic load force transmitted from the second component to the first component, thereby achieving the effect of reducing noise. Among them, the control device controls the direction of the current input to the electromagnetic module according to the increase or decrease in pressure between the first component and the second component, and controls the magnitude of the current input to the electromagnetic module according to the change in pressure between the first component and the second component. In addition, the control device controls the direction of the current input to the electromagnetic module to control the direction of the force applied by the exciter assembly 100 to the first component and the second component, and the control device controls the magnitude of the current input to the electromagnetic module to control the magnitude of the force applied by the exciter assembly 100 to the first component and the second component.

[0050] In actual use, the piezoelectric sensor 101 can monitor the pressure between the first component and the second component in real time, so that the control device can control the exciter assembly 100 to continuously apply reverse excitation to the first component and / or the second component to reduce the transmission of vibration between the two, thereby reducing noise.

[0051] In addition, during actual use, when the first component and the second component move relative to each other and the pressure between them changes, the first connecting part 1 and the second connecting part 2 can also move synchronously. At this time, the pressure change between the first connecting part 1 and the second connecting part 2 is the pressure change between the first component and the second component, so the piezoelectric sensor 101 can be arranged between the first connecting part 1 and the second connecting part 2.

[0052] like Figure 1 and Figure 2As shown, in one embodiment, the second connection part 2 further includes a resisting structure 23, which is arranged on the movable shaft 21 and located outside the assembly hole 13. When the movable shaft 21 moves along the axial direction of the assembly hole 13, the resisting structure 23 can resist the first connection part 1. The piezoelectric sensor 101 is arranged between the resisting structure 23 and the first connection part 1, wherein the first connection part 1 can move synchronously with the first component, and the resisting structure 23 and the movable shaft 21 can move synchronously with the second component. When the first component moves relative to the second component, the movable shaft 21 can be driven to move relative to the first connection part 1, so that by measuring the pressure change between the resisting structure 23 and the first connection part 1, the pressure change between the first component and the second component can be obtained. The resisting effect of the resisting structure 23 on the piezoelectric sensor 101 can improve the measurement accuracy of the piezoelectric sensor 101.

[0053] like Figure 1 and Figure 2 As shown, in one embodiment, the exciter assembly 100 further includes a cover plate 5, which is an annular structure, sleeved on the moving shaft 21, and arranged between the resisting structure 23 and the first connecting portion 1. At this time, the piezoelectric sensor 101 is located between the resisting structure 23 and the cover plate 5. When the moving shaft 21 moves relative to the first connecting portion 1 along the axial direction of the assembly hole 13, the resisting structure 23 presses the piezoelectric sensor on the cover plate 5 to detect the pressure change between the first component and the second component.

[0054] When the target object is a vehicle, multiple exciter assemblies 100 may be provided, and these exciter assemblies 100 are respectively provided at the connection between the vehicle body and the chassis, so as to improve the offset effect of the road surface excitation, thereby further reducing the noise in the vehicle.

[0055] In one embodiment, the detection unit 10 includes an audio receiving module, which is arranged on the target object and is used to detect the noise audio of the target object so as to control the power-on status of the electromagnetic module according to the noise audio of the target object. At this time, the control device mainly controls the operation of the exciter assembly 100 according to the noise audio of the target object, so that the collision between the first component and the second component emits a compensation audio, and the compensation audio sound can neutralize the noise audio of the target object, so that the final noise on the target object can meet the comfortable hearing requirements of people. Among them, the audio receiving module can be a microphone sensor. When the target object is a vehicle, the audio receiving module can be installed on the rear seat of the vehicle. Since audio is the most direct way for the human ear to experience vibration noise, the noise audio of the target object is detected by the audio receiving module, and by controlling the power-on status of the electromagnetic module, the effect of more accurately controlling the noise reduction can be achieved from the way the noise affects the human ear.

[0056] It should be understood that, in actual use, the exciter assembly 100 may include both the piezoelectric sensor 101 and the audio receiving module, or the exciter assembly 100 may include only one of the piezoelectric sensor 101 and the audio receiving module.

[0057] It can be understood that in other embodiments, the corresponding settings of the above embodiments can be replaced by other arrangements, such as:

[0058] In other embodiments, the control device may also be a part of the vibration exciter assembly 100 , or the control device may also be a separate component from the target object and the vibration exciter assembly 100 .

[0059] In other embodiments, the first magnetic module may be an electromagnetic module, the second magnetic module may be a permanent magnetic module, or both the first magnetic module and the second magnetic module may be electromagnetic modules.

[0060] In other embodiments, the target object includes a first component, a second component, a control device, a detection unit 10, a first magnetic module 3 and a second magnetic module 4, wherein the first magnetic module 3 is arranged on the first component, and the second magnetic module 4 is arranged on the second component; at least one of the first magnetic module 3 and the second magnetic module 4 is an electromagnetic module, and the electromagnetic module is connected to the control device of the target object; the detection unit 10 is used to detect the noise of the target object, and the detection unit 10 is connected to the control device of the target object, so that the control device of the target object can control the power-on status of the electromagnetic module according to the detection result of the detection unit 10, so that the first magnetic module 3 and the second magnetic module 4 attract or repel each other, thereby generating vibration between the first component and the second component to adjust the noise of the target object. That is, in this embodiment, the target object may not include the first connecting portion 1 and the second connecting portion 2, in which case the first magnetic module 3 is directly arranged on the first component, and the second magnetic module 4 is directly arranged on the second component.

[0061] This embodiment also provides a noise reduction method, which can be applied to the target object described in any of the above embodiments. The method includes: step S1, receiving the detection result of the detection unit 10 on the noise of the target object; step S2, according to the detection result, controlling the power supply of the electromagnetic module to make the first magnetic module 3 and the second magnetic module 4 attract or repel each other, thereby generating vibration between the first component and the second component to adjust the noise of the target object.

[0062] When the detection unit 10 uses a piezoelectric sensor 101, the detection result is the pressure change between the first connection part 1 and the second connection part 2. At this time, the step of "controlling the power-on condition of the electromagnetic module according to the detection result" in step S2 is: controlling the power-on direction and power-on magnitude of the electromagnetic module according to the pressure change.

[0063] Specifically, the control device can control the power supply of the electromagnetic module according to the pressure change, so that the exciter produces reverse excitation, thereby adjusting the vehicle noise. The specific control method can refer to the above. By controlling the power supply of the electromagnetic module according to the pressure change, the exciter produces reverse excitation to adjust the vehicle noise, and the noise reduction can be accurately controlled from the source of the noise.

[0064] When the detection unit 10 uses an audio receiving module, the detection result received by the control device is the noise audio of the target object. At this time, the step of "controlling the power-on status of the electromagnetic module according to the detection result" in step S2 is: controlling the power-on direction and power-on size of the electromagnetic module according to the noise audio of the target object. At this time, step S2 includes: step S21, step S22 and step S23. By controlling the power-on status of the electromagnetic module through the noise audio of the target object, the human ear's experience of noise can be accurately optimized.

[0065] Wherein, step S21 is: perform octave processing on the noise audio to obtain a real-time noise curve, wherein the real-time noise curve includes a plurality of real-time noise features arranged in sequence. Wherein, a noise feature generally includes the frequency, amplitude and duration of the noise. In addition, in actual operation, the noise audio is generally processed by 1 / 3 octave.

[0066] Step S22 is: fitting the real-time noise feature to obtain a target noise curve, wherein the target noise curve includes a plurality of target noise features arranged in sequence; the frequency arrangement order of each target noise feature in the target noise curve is the same as the frequency arrangement order of each real-time noise feature in the real-time noise curve; the duration of each target noise feature is equal to the duration of the corresponding real-time noise feature, and the amplitude of the target noise feature is greater than the amplitude of the corresponding real-time noise feature.

[0067] The audio corresponding to the target noise curve is the audio with the best sound quality that meets the acoustics of the human ear, which can make people listen more comfortably. In addition, the difference between the amplitudes of two adjacent target noise features in the target noise curve is within the target range, for example, the target range is less than or equal to 4db. The target noise curve obtained by fitting the real-time noise curve is actually based on the increase of the amplitude of each real-time noise feature in the real-time noise curve, and finally the difference between the amplitudes of adjacent noise features is within the target range, and then the target noise curve is obtained.

[0068] Step S23 is: controlling the power supply of the electromagnetic module to cause the first component and the second component to vibrate and collide to generate compensation audio, the compensation audio includes a plurality of compensation noise features arranged in sequence; the arrangement order of the compensation noise feature frequencies in the compensation audio is the same as the arrangement order of the real-time noise feature frequencies in the real-time noise curve, the duration of each compensation noise feature is equal to the duration of the corresponding real-time noise feature, and the amplitude of each compensation noise feature is equal to the difference between the amplitude of the corresponding target noise feature and the amplitude of the real-time noise feature.

[0069] In addition, step S23 can also be subdivided into step S231 and step S232, wherein step S231 is: obtaining a difference curve for the entire frequency band, the difference curve includes a plurality of difference noise features arranged in sequence; the frequency arrangement order of each difference noise feature in the difference curve is the same as the frequency arrangement order of each real-time noise feature in the real-time noise curve, the duration of each difference noise feature is equal to the duration of the corresponding real-time noise feature, and the amplitude of the difference noise feature is equal to the difference between the amplitude of the corresponding target noise feature and the amplitude of the real-time noise feature. For example, the frequencies of the three target noise features arranged in sequence in the target noise curve are 50HZ, 63HZ, and 90HZ, respectively, and the amplitudes of the three are 50db, 54db, and 58db, respectively; the amplitudes of the real-time noise features corresponding to these three target noise features are 48db, 50db, and 56db, respectively; then the first three difference noise features of the difference curve are 50HZ, 63HZ, and 90HZ, respectively, and the amplitudes of these three noise features are 2db, 4db, and 2db, respectively. It can be understood that the difference noise feature is the above-mentioned compensation noise feature.

[0070] Step S232 is: according to the difference curve, controlling the power supply of the electromagnetic module to make the first component and the second component vibrate and collide to generate the compensation audio.

[0071] It can be understood that in step S23, after obtaining a difference noise feature based on the target noise curve and the real-time noise curve, the exciter assembly 100 can be controlled to drive the first component and the second component to collide and emit a corresponding sound; while controlling the exciter assembly 100 to drive the first component and the second component to collide, the amplitude of the next difference noise feature is calculated, and the last difference noise feature is executed in this way.

[0072] In actual operation, the power supply of the exciter assembly 100 is controlled to "cause the first component and the second component to vibrate and collide to generate the compensating audio." The vibration transfer characteristics between the first component and the second component also need to be considered. This is because: only a part of the effective force generated by the exciter assembly 100 is used to make the first component and the second component collide and produce sound, and the other part can be regarded as the lost force, and the amplitude of the sound generated by the collision between the first component and the second component is determined by the size of the effective force. In actual operation, the proportion of the effective force in the force generated by the exciter assembly 100 can be regarded as the vibration transfer characteristics between the first component and the second component. After the target object is assembled, the proportion of the effective force in the force generated by the exciter assembly 100 can be measured through multiple tests.

[0073] In addition, the magnitude of the force generated by the exciter assembly 100 is related to the magnitude of the current passed into the electromagnetic module, and finally the relationship between the magnitude A of the current passed into the electromagnetic module and the amplitude B of the sound generated by the collision between the first component and the second component can be obtained, wherein A=KB, K is a coefficient, which is pre-stored in the control device. Therefore, after considering the vibration transfer characteristics between the first component and the second component, the final sound can be made closer to the target noise curve.

[0074] In addition, when a plurality of exciter assemblies 100 are provided on the target object, the control device can control the exciter assemblies 100 to drive two components connected thereto to collide with each other to generate sounds of different frequencies, thereby improving work efficiency.

[0075] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0076] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A vibration exciter assembly, characterized in that: It includes a first connecting portion, a second connecting portion, a first magnetic module and a second magnetic module; The first connection portion is used to connect to a first component of the target object, and the second connection portion is used to connect to a second component of the target object; The first magnetic module is arranged on the first connecting portion, and the second magnetic module is arranged on the second connecting portion; At least one of the first magnetic module and the second magnetic module is an electromagnetic module. By controlling the power supply status of the electromagnetic module, the first magnetic module and the second magnetic module can be attracted or repelled to drive the first connecting part and the second connecting part to produce relative movement, so that vibration is generated between the first component and the second component of the target object, so as to drive the first component and the second component of the target object to collide to generate compensation audio, thereby adjusting the noise of the target object.

2. The vibration exciter assembly according to claim 1, characterized in that: The first connecting portion has a first surface and a second surface disposed opposite to each other, and the first connecting portion is further provided with an assembly hole extending from the first surface to the second surface, and the first magnetic module is disposed in the assembly hole; The second connecting portion includes a moving shaft for connecting with a second component of the target object, and the second magnetic module is disposed on the moving shaft; The movable shaft and the second magnetic module are arranged in the assembly hole, and the movable shaft can be moved relative to the first connecting portion along the axial direction of the assembly hole by controlling the power supply of the electromagnetic module.

3. The vibration exciter assembly according to claim 2, characterized in that: The second magnetic module is an electromagnetic module, the first magnetic module includes a plurality of magnets, the plurality of magnets are arranged on the outside of the second magnetic module, and the plurality of magnets are evenly arranged around the axis of the assembly hole.

4. The vibration exciter assembly according to claim 3, characterized in that: A clamping groove is provided on the inner side wall of the assembly hole, and the magnet is clamped in the clamping groove.

5. The vibration exciter assembly according to claim 4, characterized in that: The slot extends from the first surface to the second surface, wherein the width of the slot gradually decreases along the direction from the first surface to the second surface; and the width of the magnet gradually decreases along the length direction of the magnet.

6. The vibration exciter assembly according to claim 2, characterized in that: The second connecting portion further has a resisting structure, which is arranged on the movable shaft and located outside the assembly hole. When the movable shaft moves along the axial direction of the assembly hole, the resisting structure can resist the first connecting portion. The first connection portion can move synchronously with the first component of the target object, and the resisting structure can move synchronously with the second component of the target object, so that pressure changes can be generated between the first connection portion and the resisting structure.

7. The vibration exciter assembly according to any one of claims 1 to 6, characterized in that: The exciter assembly also includes a detection unit; The detection unit is used to detect the noise of the target object so as to control the power supply of the electromagnetic module according to the detection result of the detection unit, so that the first magnetic module and the second magnetic module attract or repel each other, thereby causing the first connecting part and the second connecting part to generate relative movement to adjust the noise of the target object.

8. The vibration exciter assembly according to claim 7, characterized in that: The detection unit includes a piezoelectric sensor, which is arranged between the first component and the second component of the target object, and is used to detect the pressure change between the first component and the second component of the target object, so as to control the power supply of the electromagnetic module according to the pressure change, so that the first connecting part and the second connecting part move relative to each other, so as to apply an excitation opposite to the pressure change to the first component and the second component of the target object.

9. The vibration exciter assembly according to claim 7, characterized in that: The detection unit includes an audio receiving module, which is arranged on the target object and is used to detect the noise audio of the target object, so as to control the power supply of the electromagnetic module according to the noise audio and make the first connecting part and the second connecting part move relative to each other.

10. A target object, characterized in that: comprising a first component, a second component, a control device and the exciter assembly according to any one of claims 7 to 9; The first connecting portion is connected to the first component, and the second connecting portion is connected to the second component; The control device is connected to the detection unit and the electromagnetic module respectively, and is used to control the power supply status of the electromagnetic module according to the detection result of the detection unit.

11. The target object according to claim 10, characterized in that: The target object is a vehicle, one of the first component and the second component is a body of the vehicle, and the other is a chassis of the vehicle.

12. A noise reduction method, characterized in that: The target object as claimed in any one of claims 10 to 11, comprising: receiving a detection result of the noise of the target object by the detection unit; According to the detection result, the power supply of the electromagnetic module is controlled to make the first magnetic module and the second magnetic module attract or repel each other, thereby generating vibration between the first component and the second component to adjust the noise of the target object.

13. The noise reduction method according to claim 12, characterized in that: The detection result includes a pressure change between the first connection part and the second connection part; The step of controlling the power-on status of the electromagnetic module according to the detection result comprises: According to the pressure change, the energization direction and energization magnitude of the electromagnetic module are controlled.

14. The noise reduction method according to claim 12, characterized in that: The detection result includes the noise audio of the target object; The step of controlling the power supply of the electromagnetic module according to the detection result so that the first magnetic module and the second magnetic module attract or repel each other includes: Performing octave processing on the noise audio to obtain a real-time noise curve, wherein the real-time noise curve includes a plurality of real-time noise features arranged in sequence; The real-time noise characteristics are fitted to obtain a target noise curve; the power-on condition of the electromagnetic module is controlled to cause the first component and the second component to vibrate and collide to generate compensation audio; the compensation audio is used to reduce the difference between the target noise curve and the real-time noise curve.

15. The noise reduction method according to claim 14, characterized in that: The target noise curve includes a plurality of target noise features arranged in sequence; the frequency arrangement order of each of the target noise features in the target noise curve is the same as the frequency arrangement order of each of the real-time noise features in the real-time noise curve, the duration of each of the target noise features is equal to the duration of the real-time noise feature corresponding thereto, and the amplitude of each of the target noise features is greater than the amplitude of the real-time noise feature corresponding thereto; The compensating audio includes a plurality of compensating noise features arranged in sequence; the frequency arrangement order of each compensating noise feature in the compensating audio is the same as the frequency arrangement order of each real-time noise feature in the real-time noise curve, the duration of each compensating noise feature is equal to the duration of the corresponding real-time noise feature, and the amplitude of each compensating noise feature is equal to the difference between the amplitude of the corresponding target noise feature and the amplitude of the real-time noise feature.

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