Active noise reduction module, layout method and storage medium suitable for fluid machinery

Abstract

The present application provides an active noise reduction module adapted for fluid machinery, a layout method for the active noise reduction module, a determination method for an active noise reduction system, a device, and a computer-readable storage medium, and relates to the field of noise reduction technology. The active noise reduction module adapted for fluid machinery includes: a microphone module, including at least one microphone, arranged on a side of the active noise reduction module away from the fluid machinery, for acquiring noise signals in the noise reduction area, and also for acquiring noise reduction signals corresponding to the noise signals, wherein the noise signals include noise signals generated by the fluid machinery; an active noise reduction module, including at least one active noise reduction chip, for processing the signals acquired by the microphone module and generating noise reduction signals; a speaker module, including at least one speaker, arranged on a side of the active noise reduction module close to the fluid machinery, for transmitting noise reduction signals to reduce the noise impact of the fluid machinery on the noise reduction area. This module is applied in fluid machinery scenarios and has strong practicality.

Description

Technical Field

[0001] The present application relates to the field of noise reduction technology, and in particular to an active noise reduction module adapted for fluid machinery, a layout method of the active noise reduction module, a determination method of an active noise reduction system, a device, and a computer-readable storage medium. Background Art

[0002] Fluid machinery refers to machines that use fluid as a working medium to convert energy. It has a wide range of applications, from large-scale gas turbines, steam turbines, and turbocompressors to various types of fans that are ubiquitous in businesses and everyday life. Fans are extremely practical and convenient tools for ventilation and heat dissipation. However, due to work needs and other reasons, people often work or engage in activities in the same space or nearby areas where fluid machinery is located. The noise generated by fluid machinery during operation can cause numerous inconveniences in people's work and daily lives, and can even endanger their health. Summary of the Invention

[0003] In order to solve the above technical problems, the present application is proposed. The embodiments of the present application provide an active noise reduction module adapted for fluid machinery, a layout method for active noise reduction modules, a determination method for an active noise reduction system, an apparatus, and a computer-readable storage medium.

[0004] In the first aspect, an embodiment of the present application provides an active noise reduction module adapted for fluid machinery, comprising a microphone module, comprising at least one microphone, which is arranged on a side of the active noise reduction module away from the fluid machinery, for obtaining a noise signal in a noise reduction area, and also for obtaining a noise reduction signal corresponding to the noise signal, wherein the noise signal includes a noise signal generated by the fluid machinery; an active noise reduction module, comprising at least one active noise reduction chip, for generating a noise reduction signal after processing the signal obtained by the microphone module; and a speaker module, comprising at least one speaker, which is arranged on a side of the active noise reduction module close to the fluid machinery, for transmitting the noise reduction signal to reduce the noise impact of the fluid machinery on the noise reduction area.

[0005] In combination with the first aspect, in certain implementations of the first aspect, the positive and negative acoustic dipoles formed when the speaker module is working and the positive and negative acoustic dipoles formed when the fluid machinery is working constitute a quadrupole sound source.

[0006] In combination with the first aspect, in certain implementations of the first aspect, the fluid machinery includes a fan, and the fan is used to accelerate heat dissipation of the object to be cooled and / or the area to be cooled.

[0007] In combination with the first aspect, in certain implementations of the first aspect, the active noise reduction chip includes: a first filter unit, the transfer function of the first filter unit is based on the transfer function configuration of the sound path of the speaker module, wherein the sound path includes the electroacoustic transmission path between each speaker in the speaker module and each microphone in the microphone module; a second filter unit, connected to the input end of the first filter unit, the transfer function of the second filter unit is based on the transfer function configuration of the first filter unit; an adder unit, used to transmit the signal output by the first filter unit and the signal obtained by the microphone module to the second filter unit.

[0008] In the second aspect, an embodiment of the present application provides a layout method of an active noise reduction module, wherein the active noise reduction module includes a microphone module, an active noise reduction module and a speaker module, the microphone module including at least one microphone for obtaining a noise signal in a noise reduction area, and also for obtaining a noise reduction signal corresponding to the noise signal, wherein the noise signal includes a noise signal generated by a fluid machinery; the active noise reduction module includes at least one active noise reduction chip for processing the signal obtained by the microphone module to generate a noise reduction signal; the speaker module includes at least one speaker for transmitting the noise reduction signal to reduce the noise impact of the fluid machinery on the noise reduction area; the method includes arranging the speaker module on a side of the active noise reduction module close to the fluid machinery based on the position of the fluid machinery; and arranging the microphone module on a side of the active noise reduction module away from the fluid machinery based on the position of the fluid machinery and the position of the speaker module.

[0009] In combination with the second aspect, in certain implementations of the second aspect, based on the position of the fluid machinery, a speaker module is arranged on the side of the active noise reduction module close to the fluid machinery, including: based on the positive and negative acoustic dipoles formed when the fluid machinery is working and the preset quadrupole position, the speaker module is arranged so that the positive and negative acoustic dipoles formed when the speaker module is working and the positive and negative acoustic dipoles formed when the fluid machinery is working form a quadrupole sound source.

[0010] In a third aspect, an embodiment of the present application provides a method for determining an active noise reduction system, the active noise reduction system including the active noise reduction module mentioned in the first aspect, the method including: arranging the active noise reduction module according to the method mentioned in the second aspect; determining the transfer function of the speaker path; and determining the characteristic parameters of the active noise reduction module based on the transfer function of the speaker path.

[0011] In combination with the third aspect, in certain implementations of the third aspect, characteristic parameters of the active noise reduction module are determined based on the transfer function of the speaker path, including: determining the transfer function of the first filter unit based on the transfer function of the speaker path; determining the transfer function of the second filter unit based on the transfer function of the first filter unit, wherein the open-loop transfer function formed by the first filter unit and the second filter unit is a constant at any frequency.

[0012] In a fourth aspect, an embodiment of the present application provides a determination device for an active noise reduction system, the active noise reduction system including the active noise reduction module mentioned in the first aspect, and the device including: an arrangement module for arranging the active noise reduction module according to the method mentioned in the second aspect; a first determination module for determining the transfer function of the speaker path; and a second determination module for determining the characteristic parameters of the active noise reduction module based on the transfer function of the speaker path.

[0013] In a fifth aspect, an embodiment of the present application provides a computer-readable storage medium storing a computer program for executing the layout method of the active noise reduction module mentioned in the second aspect and / or the determination method of the active noise reduction system mentioned in the third aspect.

[0014] The active noise reduction module for fluid machinery provided in the embodiments of this application minimizes the noise impact of fluid machinery on people living in the same space or nearby areas while maintaining normal operation of the fluid machinery, providing a relatively comfortable experience for those working or living in these areas. This active noise reduction module, when applied in fluid machinery scenarios, ensures effective noise reduction while offering a technical solution that is easy to implement and highly applicable, allowing for large-scale practical deployment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 FIG2 is a schematic structural diagram of an active noise reduction module adapted for fluid machinery provided in one embodiment of the present application.

[0016] Figure 2 FIG2 is a flow chart of a layout method of an active noise reduction module adapted for fluid machinery provided in one embodiment of the present application.

[0017] Figure 3 FIG2 is a schematic diagram showing the layout of an active noise reduction module adapted for fluid machinery provided in one embodiment of the present application.

[0018] Figure 4 FIG2 is a flow chart of a layout method of an active noise reduction module adapted for fluid machinery provided in another embodiment of the present application.

[0019] Figure 5 Shown are the preset quadrupole positions provided in one embodiment of the present application.

[0020] Figure 6 Shown is a schematic diagram of the layout of an active noise reduction module adapted for fluid machinery provided in another embodiment of the present application.

[0021] Figure 7 FIG2 is a flow chart of a determination method of an active noise reduction system provided by an embodiment of the present application.

[0022] Figure 8 FIG2 is a flow chart of determining characteristic parameters of an active noise reduction module based on a transfer function of a speaker path according to an embodiment of the present application.

[0023] Figure 9 FIG. 1 is a schematic structural diagram of an active noise reduction chip provided in one embodiment of the present application.

[0024] Figure 10 FIG2 is a schematic diagram of the structure of a determination device of an active noise reduction system provided in one embodiment of the present application.

[0025] Figure 11 Shown is a structural diagram of a second determination module provided in an embodiment of the present application. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0027] Fluid machinery refers to machines that use fluid as a working medium to convert energy. It has a wide range of applications, from large-scale gas turbines, steam turbines, and turbocompressors to various types of fans that are ubiquitous in businesses and everyday life. Fans are extremely practical and convenient tools for ventilation and heat dissipation. However, due to work needs and other reasons, people often work or live in the same space or nearby areas where fluid machinery is located. The noise generated by fluid machinery during operation can cause numerous inconveniences in people's work and daily lives, and can even endanger their health.

[0028] Without affecting the normal application of fluid machinery (i.e., not removing the noise source, such as continuing to use fans to accelerate the heat dissipation of objects or areas to be cooled), it is of practical significance to minimize the noise impact of fluid machinery on people in the same space or nearby areas.

[0029] Fluid machinery such as the above is essentially a rotating structure and has similar noise characteristics. To address this type of noise, the embodiments of the present application provide an active noise reduction module adapted for fluid machinery, a layout method for the active noise reduction module, a determination method for the active noise reduction system, an apparatus, and a computer-readable storage medium, so as to achieve the goal of not affecting the normal application of the fluid machinery while minimizing the noise impact of the fluid machinery on people in the same space or nearby areas, thereby providing a relatively comfortable experience for people working or living in this area.

[0030] Figure 1 FIG. 1 is a schematic diagram of the structure of an active noise reduction module adapted for fluid machinery provided in one embodiment of the present application. Figure 1 As shown, the active noise reduction module adapted for fluid machinery provided in an embodiment of the present application includes a microphone module 1, an active noise reduction module 2, and a speaker module 3. The microphone module 1 includes at least one microphone, which is arranged on a side of the active noise reduction module away from the fluid machinery, and is used to obtain a noise signal in the noise reduction area, and is also used to obtain a noise reduction signal corresponding to the noise signal, wherein the noise signal includes a noise signal generated by the fluid machinery; the active noise reduction module 2 includes at least one active noise reduction chip, which is used to process the signal obtained by the microphone module and generate a noise reduction signal; the speaker module 3 includes at least one speaker, which is arranged on a side of the active noise reduction module close to the fluid machinery, and is used to transmit the noise reduction signal to reduce the noise impact of the fluid machinery on the noise reduction area.

[0031] The following combination Figures 2 to 6 The following describes in detail a layout method of an active noise reduction module adapted for fluid machinery provided in an embodiment of the present application. Figure 2 FIG. 1 is a flow chart of a layout method of an active noise reduction module adapted for fluid machinery provided by an embodiment of the present application. Figure 2 As shown, the layout method of the active noise reduction module adapted for fluid machinery provided in the embodiment of the present application includes the following steps.

[0032] Step S100 : Based on the position of the fluid machinery, a speaker module is arranged on a side of the active noise reduction module close to the fluid machinery.

[0033] For example, the position of the fluid machinery is obtained, and based on the obtained position of the fluid machinery, the speaker module is placed on the side of the active noise reduction module that is close to the fluid machinery. It can be understood that by placing the speaker module based on the position of the fluid machinery, the position of the active noise reduction module is also determined.

[0034] For example, if the active noise reduction module has already been arranged at the position of the speaker module, then based on the position of the fluid machinery, the active noise reduction module is placed so that the speaker module is closest to the fluid machinery.

[0035] Step S200 : Based on the position of the fluid machine and the position of the speaker module, a microphone module is arranged on a side of the active noise reduction module away from the fluid machine.

[0036] For example, the side of the active noise reduction module away from the fluid machinery may be the side of the active noise reduction module close to the noise reduction area, which can be understood as the side of the active noise reduction module close to the area where people work or move.

[0037] After the modules are arranged in steps S100 and S200, Figure 3 shown. Figure 3 The figure shows a schematic diagram of the layout of an active noise reduction module adapted for fluid machinery according to an embodiment of the present application. Reference numeral 1 represents a microphone module, reference 2 represents an active noise reduction module, reference 3 represents a speaker module, reference 7 represents the fluid machinery, and reference 8 represents the active noise reduction module.

[0038] The embodiment of the present application provides a layout method for an active noise reduction module adapted for fluid machinery. The active noise reduction module is arranged based on the position of the fluid machinery, and further, the speaker module and the microphone module in the active noise reduction module are arranged, so as to minimize the noise impact caused by the fluid machinery to people in the same space or nearby areas. The process is simple and the practicality and operability are strong.

[0039] Figure 4 The figure shows a flow chart of a layout method of an active noise reduction module adapted for fluid machinery provided by another embodiment of the present application. Figure 2 Based on the embodiment shown Figure 4 The embodiment shown is described below in detail. Figure 4 The embodiment shown is Figure 2 The differences and similarities between the illustrated embodiments are not described in detail.

[0040] like Figure 4 As shown, the layout method of the active noise reduction module adapted for fluid machinery provided in the embodiment of the present application includes the following steps.

[0041] Step S110 , based on the positive and negative acoustic dipoles formed when the fluid machinery is working and the preset quadrupole positions, the speaker modules are arranged so that the positive and negative acoustic dipoles formed when the speaker modules are working and the positive and negative acoustic dipoles formed when the fluid machinery is working form a quadrupole sound source.

[0042] For example, a fan, a type of fluid machine, is used to accelerate heat dissipation from an object and / or area to be cooled. During operation, air enters through an inlet, passes through its impeller, and exits through an outlet. Acoustically, this fan can be thought of as a dipole, or a pair of poles, namely, positive and negative acoustic dipoles. The positive and negative acoustic dipoles formed during operation of the fluid machine continuously alternate.

[0043] Figure 5 Shown are the preset quadrupole positions provided in one embodiment of the present application.

[0044] For example, when the preset quadrupole positions adopt a 2×2 crossover type, that is, Figure 6 When the speaker modules are arranged as shown, the positive and negative acoustic dipoles formed when the speaker modules are working and the positive and negative acoustic dipoles formed when the fluid machinery is working constitute a quadrupole sound source. Figure 6 FIG2 is a schematic diagram showing the layout of an active noise reduction module adapted for fluid machinery according to another embodiment of the present application, wherein 1 represents a microphone module, 2 represents an active noise reduction module, 3 represents a speaker module, and 7 represents a fluid machinery.

[0045] The layout method of the active noise reduction module adapted for fluid machinery provided in the embodiment of the present application is to arrange the speaker module and the positive and negative acoustic dipoles formed by the fluid machinery during operation to form a quadrupole sound source, and generate corresponding anti-phase sound waves at the source end of the acoustic dipole noise source of the fluid machinery to interfere with the overall interference effect on the downstream radiated noise field, which is significantly stronger than the following. Figure 3 The interference effect of the speaker module and the positive and negative acoustic dipoles formed by the fluid machinery when arranged along a linear pattern is shown.

[0046] In the embodiment of the present application, the anti-noise source loudspeaker and the noise source fluid machine are combined and configured as a quadrupole sound source, which can enable the active noise reduction module to make its best noise reduction contribution at the hardware level.

[0047] Figure 7 The figure shows a flow chart of a determination method of an active noise reduction system provided by an embodiment of the present application. The active noise reduction system includes the active noise reduction module adapted to fluid machinery of each embodiment of the present application mentioned above. Figure 7 As shown, the determination method of the active noise reduction system provided in the embodiment of the present application includes the following steps.

[0048] Step S10 : arranging the active noise reduction modules according to the layout method of the active noise reduction modules adapted to fluid machinery according to the various embodiments of the present application mentioned above.

[0049] For example, in a fluid machinery operating scenario, an active noise reduction module is placed near a fan that accelerates heat dissipation from an object and / or area to be cooled. Specifically, the placement of the speaker module and microphone module within the module is determined. For example, the active noise reduction module can be placed at the fan's air outlet.

[0050] Step S20: determining the transfer function of the speaker path.

[0051] Exemplarily, the sound path of the speaker module includes the electroacoustic transmission path between each speaker in the speaker module and each microphone in the microphone module. For example, if there are A speakers in the speaker module and B microphones in the microphone module, then the sound path is A*B. After the active noise reduction module, i.e., the speaker module and microphone module in the module, are arranged in the fluid machinery working scene (the placement of the speaker module and microphone module in the module is determined), the transfer function of the sound path can be obtained through measurement.

[0052] Step S30 : determining characteristic parameters of the active noise reduction module based on the transfer function of the speaker path.

[0053] Exemplarily, the active noise reduction module includes an active noise reduction module, which has corresponding characteristic parameters, such as noise reduction parameters.

[0054] The steps of the method for determining an active noise reduction system provided in the embodiment of the present application are to determine the transfer function of the sound transmission path after the active noise reduction module is arranged in the fluid machinery working scene, so as to ultimately determine the characteristic parameters of the active noise reduction module, which meets actual needs and can be efficiently carried out in practical applications.

[0055] Figure 8 The figure shows a flow chart of determining characteristic parameters of an active noise reduction module based on a transfer function of a loudspeaker path according to an embodiment of the present application. Figure 7 Based on the embodiment shown Figure 8 The embodiment shown is described below in detail. Figure 8 The embodiment shown is Figure 7 The differences and similarities between the illustrated embodiments are not described in detail.

[0056] like Figure 8 As shown, in the determination method of the active noise reduction system provided in the embodiment of the present application, the characteristic parameters of the active noise reduction module are determined based on the transfer function of the speaker path, including the following steps.

[0057] Step S31 : determining a transfer function of a first filter unit based on a transfer function of a speaker path.

[0058] Exemplarily, the active noise reduction module includes an active noise reduction module, including at least one active noise reduction chip, such as Figure 9 As shown, the active noise reduction chip includes a first filter unit 4, a second filter unit 5 and an adder unit 6 ( Figure 9 FIG2 is a schematic diagram of the structure of an active noise reduction chip provided in one embodiment of the present application. The second filter unit is connected to the input end of the first filter unit, and the adder unit is used to transmit the signal output by the first filter unit and the signal obtained by the microphone module to the second filter unit.

[0059] Exemplarily, the transfer function of the first filter unit is configured based on the transfer function of the speaker path determined in step S20 .

[0060] Step S32 : determining a transfer function of the second filter unit based on the transfer function of the first filter unit, wherein the open-loop transfer function formed by the first filter unit and the second filter unit is a constant value at any frequency.

[0061] Exemplarily, the transfer function of the second filter unit is configured based on the transfer function of the first filter unit determined in step S31. In this embodiment of the present application, the open-loop transfer function determined by the transfer function of the first filter unit and the transfer function of the second filter unit (corresponding to the characteristic parameter) is maintained at a characteristic constant value, which enables the active noise reduction module to make its optimal noise reduction contribution at the automatic control logic level.

[0062] The steps of the determination method of the active noise reduction system provided in the embodiment of the present application are to quantify the first filter unit and the second filter unit in the active noise reduction module based on the transfer function of the speaker path, and determine the characteristic parameters of the active noise reduction module so that the active noise reduction module generates a noise reduction signal after processing the signal obtained by the microphone module, thereby maximally canceling the noise signal.

[0063] Figure 10 The figure shows a schematic diagram of the structure of the determination device of the active noise reduction system provided by an embodiment of the present application. The active noise reduction system includes the active noise reduction module adapted to fluid machinery of each embodiment of the present application mentioned above. Figure 10 As shown, the determination device for an active noise reduction system provided in an embodiment of the present application includes a layout module 10, a first determination module 20, and a second determination module 30. Specifically, the layout module 10 is configured to arrange the active noise reduction modules according to the layout method for active noise reduction modules adapted for fluid machinery described in various embodiments of the present application. The first determination module 20 is configured to determine the transfer function of the sound transmission path. The second determination module 30 is configured to determine characteristic parameters of the active noise reduction modules based on the transfer function of the sound transmission path.

[0064] Figure 11 The figure shows a schematic diagram of the structure of the second determination module provided in one embodiment of the present application. Figure 10 Based on the embodiment shown Figure 11 The embodiment shown is described below in detail. Figure 11 The embodiment shown is Figure 10 The differences and similarities between the illustrated embodiments are not described in detail.

[0065] like Figure 11As shown, in the embodiment of the present application, the second determination module 30 includes a first determination submodule 31 and a second determination submodule 32. Specifically, the first determination submodule 31 is configured to determine the transfer function of the first filter unit based on the transfer function of the speaker path. The second determination submodule 32 is configured to determine the transfer function of the second filter unit based on the transfer function of the first filter unit, wherein the open-loop transfer function formed by the first and second filter units is constant at any frequency.

[0066] In addition to the above-mentioned methods and devices, embodiments of the present application may also be a computer program product, which includes computer program instructions. When the computer program instructions are executed by a processor, the processor executes the steps of the layout method of the active noise reduction system according to various embodiments of the present application and / or the determination method of the active noise reduction system described above in this specification.

[0067] The computer program product may be written in any combination of one or more programming languages to implement the program code for performing the operations of the embodiments of the present application, including object-oriented programming languages such as Java, C++, and conventional procedural programming languages such as "C" or similar programming languages. The program code may be executed entirely on the user's computing device, partially on the user's computing device, as a standalone software package, partially on the user's computing device and partially on a remote computing device, or entirely on a remote computing device or server.

[0068] In addition, an embodiment of the present application may also be a computer-readable storage medium having computer program instructions stored thereon. When the computer program instructions are executed by a processor, the processor executes the steps of the layout method of the active noise reduction system according to various embodiments of the present application and / or the determination method of the active noise reduction system described above in this specification.

[0069] Computer readable storage media can adopt any combination of one or more readable media. The readable medium can be a readable signal medium or a readable storage medium. The readable storage medium can, for example, include but is not limited to a system, device or component of electricity, magnetism, light, electromagnetic, infrared rays, or semiconductor, or any combination thereof. More specific examples (non-exhaustive list) of readable storage media include: an electrical connection with one or more wires, a portable disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof.

[0070] The basic principles of the present application have been described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, and effects mentioned in this application are merely illustrative and not restrictive, and it should not be assumed that these advantages, strengths, and effects are required of each embodiment of this application. In addition, the specific details disclosed above are merely illustrative and facilitating understanding, and are not restrictive. The above details do not limit this application to necessarily being implemented using the above specific details.

[0071] The block diagrams of the devices, devices, equipment, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As will be appreciated by those skilled in the art, these devices, devices, equipment, and systems can be connected, arranged, or configured in any manner. Words such as "include," "comprise," "have," and the like are open-ended words, meaning "including but not limited to," and can be used interchangeably therewith. The words "or" and "and" used herein refer to the words "and / or" and can be used interchangeably therewith, unless the context clearly indicates otherwise. The word "such as" used herein refers to the phrase "such as but not limited to," and can be used interchangeably therewith.

[0072] It should also be noted that in the apparatus, device, and method of the present application, each component or each step can be decomposed and / or recombined, and such decomposition and / or recombination should be regarded as equivalent solutions of the present application.

[0073] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0074] The above description has been provided for the purpose of illustration and description. Furthermore, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although a number of example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. An active noise reduction module adapted for fluid machinery, characterized in that: include: a microphone module, comprising at least one microphone, arranged on a side of the active noise reduction module away from the fluid machinery, for acquiring a noise signal in a noise reduction area and further for acquiring a noise reduction signal corresponding to the noise signal, wherein the noise signal includes a noise signal generated by the fluid machinery; an active noise reduction module, comprising at least one active noise reduction chip, configured to process the signal acquired by the microphone module and generate the noise reduction signal; The speaker module includes at least one speaker, which is arranged on a side of the active noise reduction module close to the fluid machinery, and is used to transmit the noise reduction signal to reduce the noise impact of the fluid machinery on the noise reduction area. Based on the positive and negative acoustic dipoles formed when the fluid machinery is working and the preset quadrupole position, the speaker module is arranged so that the positive and negative acoustic dipoles formed when the speaker module is working and the positive and negative acoustic dipoles formed when the fluid machinery is working form a quadrupole sound source.

2. The active noise reduction module according to claim 1, characterized in that: The fluid machine includes a fan, which is used to accelerate the heat dissipation of an object to be cooled and / or an area to be cooled.

3. The active noise reduction module according to claim 1, characterized in that: The active noise reduction chip includes: a first filter unit, wherein a transfer function of the first filter unit is configured based on a transfer function of a speaker path of the speaker module, wherein the speaker path includes an electroacoustic transfer path between each speaker in the speaker module and each microphone in the microphone module; a second filter unit connected to an input terminal of the first filter unit, wherein a transfer function of the second filter unit is configured based on the transfer function of the first filter unit; An adder unit is configured to transmit the signal output by the first filter unit and the signal acquired by the microphone module to the second filter unit.

4. A layout method for an active noise reduction module, characterized in that: The active noise reduction module includes a microphone module, an active noise reduction module and a speaker module. The microphone module includes at least one microphone, which is used to obtain a noise signal in the noise reduction area and also to obtain a noise reduction signal corresponding to the noise signal, wherein the noise signal includes a noise signal generated by a fluid machinery; The active noise reduction module includes at least one active noise reduction chip, which is used to process the signal obtained by the microphone module and generate the noise reduction signal; The speaker module includes at least one speaker for transmitting the noise reduction signal to reduce the noise impact of the fluid machinery on the noise reduction area; The method comprises: Arranging the speaker module on a side of the active noise reduction module close to the fluid machinery based on the position of the fluid machinery, including: arranging the speaker module based on positive and negative acoustic dipoles formed when the fluid machinery is working and a preset quadrupole position, so that the positive and negative acoustic dipoles formed when the speaker module is working and the positive and negative acoustic dipoles formed when the fluid machinery is working form a quadrupole sound source; Based on the position of the fluid machine and the position of the speaker module, the microphone module is arranged on a side of the active noise reduction module away from the fluid machine.

5. A method for determining an active noise reduction system, characterized in that: The active noise reduction system includes the active noise reduction module according to any one of claims 1 to 3, and the method includes: Arranging the active noise reduction module according to the method of claim 4; Determine the transfer function of the speaker path; Based on the transfer function of the sound-speaker path, characteristic parameters of the active noise reduction module are determined.

6. The determination method according to claim 5, characterized in that: The determining of characteristic parameters of the active noise reduction module based on the transfer function of the speaker path includes: determining a transfer function of the first filter unit based on the transfer function of the speaker path; The transfer function of the second filter unit is determined based on the transfer function of the first filter unit, wherein the open-loop transfer function formed by the first filter unit and the second filter unit is a constant value at any frequency.

7. A determination device for an active noise reduction system, characterized in that: The active noise reduction system includes the active noise reduction module according to any one of claims 1 to 3, and the device includes: an arrangement module, configured to arrange the active noise reduction module according to the method of claim 4; A first determination module is used to determine the transfer function of the speaker path; The second determination module is configured to determine characteristic parameters of the active noise reduction module based on the transfer function of the speaker path.

8. A computer-readable storage medium, characterized in that The storage medium stores a computer program, and the computer program is used to execute the method according to any one of claims 4 to 6.

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