Angle-adjustable active noise reduction control method and device for air conditioner and air conditioner

Abstract

The invention provides an angle-adjustable active noise reduction control method and device for an air conditioner and the air conditioner, and relates to the technical field of air conditioner noise reduction. The method comprises the steps that the number of users in all areas in the space where the air conditioner is located is determined; the areas are areas where different sectors with the position of the air conditioner as the circle center intersect with the space where the sectors are located; adjusting the position of an active noise reduction module to enable a noise reduction signal output by the active noise reduction module to cover an area with the most users; an air conditioner internal noise signal is obtained, and the active noise reduction module is controlled to directionally output a noise reduction signal according to the noise signal; the noise reduction signal and the noise signal are equal in amplitude and opposite in phase. The control logic is simple and easy to implement, and can be used in a large range; and active noise reduction processing is conducted on the user concentrated area, so that the volume of the air conditioner noise is reduced, adverse effects of the noise on users are avoided, and the user experience is improved.

Description

Technical Field

[0001] This invention relates to the field of air conditioning noise reduction technology, and more specifically, to an active noise reduction control method, device, and air conditioner with adjustable angle. Background Technology

[0002] Air conditioners have become an essential household appliance, but they generate noise during use, affecting the user experience. Traditional noise reduction methods for air conditioners, such as installing shielding or sound insulation layers, are usually only effective against high-frequency noise above 2kHz, while their effectiveness against low-frequency noise is less than satisfactory. Summary of the Invention

[0003] To address the aforementioned problems, this invention provides an active noise reduction control method for an adjustable-angle air conditioner. The method includes: determining the number of users in each area within the space where the air conditioner is located; each area being a region where different sectors centered on the air conditioner intersect the space; adjusting the position of the active noise reduction module so that the noise reduction signal output by the active noise reduction module covers the area with the most users; acquiring an internal noise signal from the air conditioner; and controlling the active noise reduction module to output a directional noise reduction signal based on the noise signal; wherein the noise reduction signal and the noise signal have equal amplitude and opposite phase.

[0004] The active noise reduction control method for adjustable air conditioner angle provided in this invention has simple and easy-to-implement control logic and can be widely used. It performs active noise reduction processing on areas where users are concentrated, thereby reducing the volume of air conditioner noise, avoiding the adverse effects of noise on users, and improving the user experience.

[0005] Optionally, each of the aforementioned regions is a sector centered on the location of the air conditioner with a preset central angle that intersects with the aforementioned space; the noise reduction signal output by the active noise reduction module covers the sector region centered on the location of the air conditioner with the preset central angle.

[0006] The embodiments of the present invention define feasible ways to divide the space where the air conditioner is located into areas, and to cover the area with directional active noise reduction, thereby performing directional active noise reduction for areas where users are concentrated.

[0007] Optionally, the preset central angle is 120°.

[0008] In this embodiment of the invention, noise reduction is performed at a 120° angle for air conditioner radiation. According to the parallelogram law, sound waves with the same frequency and amplitude but opposite phase will not aggravate noise within other angular ranges, but will only reduce or even cancel noise within their own angular range.

[0009] Optionally, after the air conditioner internal noise signal is acquired, the method further comprises: judging whether the noise signal is greater than a preset noise threshold; if yes, performing the controlling the active noise reduction module to directively output a noise reduction sound signal according to the noise signal.

[0010] In the embodiment of the present application, by selectively performing the active noise reduction method, effective noise reduction can be achieved, and energy consumption can be reduced.

[0011] Optionally, if the air conditioner operates in a daytime mode, a first preset noise threshold is adopted; if the air conditioner operates in a night mode, a second preset noise threshold is adopted; the first preset noise threshold is greater than the second preset noise threshold.

[0012] In the embodiment of the present application, the user's tolerance to noise is relatively high in the daytime mode, and a larger noise threshold can be adopted; the user's tolerance to noise is relatively low in the night mode, and a smaller noise threshold can be adopted, so that the degree of active noise reduction can be flexibly adjusted.

[0013] Optionally, the method further comprises: collecting a real-time video stream, and determining the number of users in each region in the space where the air conditioner is located according to the real-time video stream; or collecting radar data or infrared data, and determining the number of users in each region in the space where the air conditioner is located according to the radar data or the infrared data.

[0014] In the embodiment of the present application, the position of the user can be identified based on machine vision technology, radar positioning technology or infrared positioning technology, and then the most densely populated region of the user can be accurately determined.

[0015] Optionally, the method further comprises: if the air conditioner operates in an active noise reduction mode, after the step of acquiring the air conditioner internal noise signal, it is not necessary to judge the size of the noise signal.

[0016] In the embodiment of the present application, the air conditioner can always perform active noise reduction, and it is not necessary to consider the size of the noise generated by the air conditioner, and the region with more people can be directly processed for noise reduction.

[0017] The embodiment of the present application provides an active noise reduction control device with adjustable angle of an air conditioner, the device comprises: a user region determination module, which is used to determine the number of users in each region in the space where the air conditioner is located; each region is a region intersected with the space by different sectors with the location of the air conditioner as the center; a noise reduction direction adjustment module, which is used to adjust the position of an active noise reduction module, so that the noise reduction sound signal output by the active noise reduction module covers the region with the most users; a noise reduction module, which is used to acquire an air conditioner internal noise signal, and control the active noise reduction module to directively output a noise reduction sound signal according to the noise signal; the noise reduction sound signal has the same amplitude and opposite phase as the noise signal.

[0018] The air conditioner of the embodiment of the present application comprises the active noise reduction control device for angle-adjustable air conditioner.

[0019] The computer readable storage medium of the embodiment of the present application stores a computer program, and the computer program is read and run by a processor to realize the active noise reduction control method for angle-adjustable air conditioner.

[0020] The active noise reduction control device for angle-adjustable air conditioner and the air conditioner of the present application can achieve the same technical effects as the active noise reduction control method for angle-adjustable air conditioner. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 The flowchart of the active noise reduction control method for angle-adjustable air conditioner of the embodiment of the present application is provided.

[0022] Figure 2 The detailed flowchart of the active noise reduction control method of the embodiment of the present application is provided.

[0023] Figure 3 The structure diagram of the active noise reduction control device for angle-adjustable air conditioner of the embodiment of the present application is provided. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the drawings.

[0025] The active noise reduction is a combination of acoustic theory and electrical theory, which adopts the method of active noise cancellation, installs the active noise reduction module in the cavity of the air conditioner, detects the source of noise, analyzes it through the noise reduction processing module, and finally uses the loudspeaker to generate the sound wave with the same amplitude and opposite phase as the collected noise to cancel it, so as to achieve good noise reduction effect.

[0026] The air conditioner uses a three-dimensional space, and due to the limitation of noise collection / analysis technology, it is difficult to reduce all noises in the whole space. The embodiment of the present application provides a new air conditioner noise reduction control method, which adopts the combination of positioning technology and active noise reduction to perform directional angle active noise reduction on the user area.

[0027] Exemplarily, the embodiment of the present application can collect noise in real time through a microphone, analyze and process noise of a certain direction angle of the air conditioner in real time using a noise reduction processing module, and output a sound wave of the same frequency and amplitude in the opposite direction, so as to actively reduce noise of a certain direction angle of the air conditioner. At the same time, a camera or a radar positioning device can collect the area where the user is in real time, and find the area where the user is most concentrated, and actively reduce noise in the direction angle where the user is most concentrated by adjusting the angle of the loudspeaker, thereby improving the quality and the experience of the user.

[0028] Figure 1 A schematic flow chart of an active noise reduction control method of an air conditioner with adjustable angle in the embodiment of the present application is shown, and the method comprises the following steps:

[0029] S102, determining the number of users in each area in the space where the air conditioner is located.

[0030] It should be noted that the radius of the above sector is greater than the maximum distance between the air conditioner and the boundary of the space, so as to ensure that the superposition of each area can cover the entire space. Exemplarily, the plane of the above sector passes through the intersection of the air conditioner and the bottom surface of the space. For example, the above different sectors can be projected onto the bottom surface of the space, and then the intersection area of the sector and the space is determined as each different area.

[0031] Optionally, each area is a sector with a preset central angle and the center of the sector being the location of the air conditioner. For example, the preset central angle is 120°.

[0032] In the embodiment, the position can be recognized based on a camera, a radar, an infrared sensor, etc. Optionally, the positions of all users in the space where the air conditioner is located can be determined first, and then the number of users in each area can be determined; or each area can be scanned one by one (for example, rotating by a certain angle each time), so as to determine the number of users in each area.

[0033] Optionally, it can also include collecting real-time video streams, and determining the number of users in each area in the space where the air conditioner is located according to the real-time video streams; or collecting radar data or infrared data, and determining the number of users in each area in the space where the air conditioner is located according to the radar data or the infrared data. In the embodiment, the position of the user can be recognized based on machine vision technology, radar positioning technology or infrared positioning technology, and then the area where the user is most concentrated can be accurately determined.

[0034] S104, adjusting the position of the active noise reduction module, so that the noise reduction sound signal output by the active noise reduction module covers the area where the user is most concentrated.

[0035] After the number of users in each area of the space where the air conditioner is located is known, active noise reduction is performed on the area with the most users.

[0036] After the area with the most users is determined, the position (which can also be referred to as the direction) of the active noise reduction module can be adjusted to change the direction of the noise reduction sound signal emitted by the active noise reduction module. In this embodiment, directional sound technology can be used as an example. After the position of the active noise reduction module is adjusted, the noise reduction sound signal output by the active noise reduction module propagates along a certain path and covers the area with the most users.

[0037] Based on this, the noise reduction sound signal output by the active noise reduction module covers a sector area with the air conditioner as the center and a preset central angle. By outputting a noise reduction sound signal with the same amplitude and opposite phase as the original noise signal, the two signals are superimposed and canceled at the noise reduction location, thereby achieving predetermined area noise reduction. For example, the preset central angle is 120°.

[0038] Considering that multi-directional noise reduction may increase the noise of the air conditioner at a certain angle, this embodiment is based on improving the user experience and only reduces noise in a 120° angle of the 360° radiation angle of the air conditioner. According to the parallelogram rule, sound waves with the same frequency and amplitude and opposite phase will not increase the noise in other angle ranges, but only reduce or even cancel the noise in the angle range.

[0039] S106, obtaining an internal noise signal of the air conditioner, and controlling the active noise reduction module to directionally output a noise reduction sound signal according to the noise signal; the noise reduction sound signal has the same amplitude and opposite phase as the noise signal.

[0040] After the position of the active noise reduction module is adjusted, the internal noise signal of the air conditioner can be obtained in real time, so as to generate a noise reduction sound signal with the same amplitude and opposite phase as the noise signal in real time. The active noise reduction module directionally outputs the noise reduction sound signal with the same amplitude and opposite phase as the noise signal, thereby reducing noise in the angle range.

[0041] The above S102-S106 can be executed in a loop. As the position of the user in the space where the air conditioner is located changes, the position of the active noise reduction module can also change, and the coverage area of the noise reduction sound signal output by the active noise reduction module also changes, thereby achieving adjustable angle active noise reduction.

[0042] The air conditioner adjustable angle active noise reduction control method provided by the embodiment of the application has simple control logic and is easy to implement, and can be widely used. The area with the most users is actively reduced, thereby reducing the volume of the noise of the air conditioner and avoiding the adverse effects of the noise on the user, thereby improving the user experience.

[0043] The active noise reduction method can be selectively executed considering that the noise of the air conditioner in some operating states is not large. Based on this, after obtaining the internal noise signal of the air conditioner, the method can further judge the size of the noise signal, and only when the volume of the noise signal is large, active noise reduction is performed. Alternatively, the method can further include: judging whether the noise signal is greater than a preset noise threshold; if yes, performing the step of controlling the active noise reduction module to directionally output the noise reduction sound signal according to the noise signal. By selectively executing the active noise reduction method, effective noise reduction can be achieved, and energy consumption can be reduced.

[0044] As a feasible way, different noise thresholds are used for noise signal size judgment based on the operating mode of the air conditioner. Based on this, if the air conditioner operates in the daytime mode, a first preset noise threshold is used; if the air conditioner operates in the night mode, a second preset noise threshold is used; wherein the first preset noise threshold is greater than the second preset noise threshold. In this embodiment, the user's tolerance to noise is relatively high in the daytime mode, and a larger noise threshold can be used; the user's tolerance to noise is relatively low in the night mode, and a smaller noise threshold can be used, thereby achieving flexible adjustment of the degree of active noise reduction.

[0045] The daytime mode or the night mode can be determined according to the mode selection, or can be determined according to the daytime or the night of the real world.

[0046] As another feasible way, the air conditioner can always perform active noise reduction without considering the operating mode. In this state, the size of the noise generated by the air conditioner can not be considered, and noise reduction processing can be directly performed on the area with more people. Alternatively, if the air conditioner operates in the active noise reduction mode, the size of the noise signal does not need to be judged after the step of obtaining the internal noise signal of the air conditioner.

[0047] Figure 2 A detailed flowchart of the active noise reduction control method in the embodiment of the application is shown, which includes the following steps:

[0048] S201, after the air conditioning system is started, initialization is entered.

[0049] S202, according to the mode selection, it is judged to enter the daytime and night mode, if the user does not set, the system defaults to the daytime mode.

[0050] S203, the camera of the air conditioner is used to collect the area where the user is in real time, and the area with the most users within 120 degrees is found.

[0051] S204, the above area is fixed, and the position of the loudspeaker is adjusted according to the angle change of the fixed area.

[0052] The active noise reduction technology is that an active noise signal with the same amplitude and opposite phase of the original noise signal is generated at the same point, and the two signals are superimposed and canceled at the noise reduction position, so that the noise reduction is realized. Since the environment of the air conditioner is in a three-dimensional closed space, it is impossible to truly reduce all the noise generated by the air conditioner in the space, and multi-directional noise reduction will increase the noise at a certain angle of the air conditioner. The embodiment of the application is based on improving the user experience, and only the 120-degree angle of the 360-degree radiation angle of the air conditioner is reduced, so that the noise is not increased, but only reduced / eliminated. Since sound propagates in the form of waves, according to the parallelogram law, the sound wave with the same frequency and amplitude and opposite phase at a certain point away from the sound source can eliminate the noise at this point, and the noise in the left and right 60-degree range will be reduced, that is, the sound waves with equal size and opposite direction in the 120-degree range will not increase the noise in other angle ranges, but only reduce the noise / eliminate the noise in the angle range.

[0053] S205, determining whether the speaker adjustment is completed. If yes, S206 is executed; if no, S203 is executed.

[0054] S206, the noise measurement module measures the noise size generated by the air conditioner in real time.

[0055] S207, determining whether it is a daytime mode. If yes, S209 is executed; if no, S208 is executed.

[0056] S208, determining whether the noise is greater than or equal to 40db. If yes, S210 is executed; if no, S203 is executed.

[0057] S209, determining whether the noise is greater than or equal to 50db. If yes, S201 is executed; if no, S203 is executed.

[0058] When the noise in the daytime mode reaches 50Db or more, the active noise reduction environment mode is entered; when the noise in the nighttime mode reaches 40Db or more, the active noise reduction environment mode is entered. If the noise size does not reach the set initial value, the operation of S203 is repeated.

[0059] S210, the noise acquisition device acquires the noise in the air conditioner in real time through the microphone.

[0060] S211, the analog-digital conversion module converts.

[0061] After the air conditioner is normally operated, the noise acquisition device acquires the noise in the air conditioner in real time through the microphone, converts the sound signal into an analog electric signal, and takes the analog electric signal as the input of the digital-analog conversion module.

[0062] S212, the data processing module processes.

[0063] The digital-analog conversion module converts the received analog electric signal into a digital electric signal and inputs the digital electric signal into the data processing module; the data processing module filters the input noise signal by taking a known signal as a reference and outputs a sound wave of the same frequency, the same amplitude and opposite phase through a speaker.

[0064] When the active noise reduction mode is selected, S206-S209 can be bypassed, and the noise generated by the air conditioner is not measured, and the 120-degree angle region with more people is directly subjected to noise reduction processing.

[0065] S213, outputting a same-frequency reverse signal.

[0066] The control method for suppressing noise of an air conditioner provided by the embodiment of the application has the following advantages: the control method is simple in logic and easy to implement, and can be widely used; the user area is collected by machine vision technology, the number of users in the area is calculated, and active noise reduction processing is performed on the fixed angle with a large number; the influence of noise on work, study, entertainment and rest of users can be reduced; different modes are selected according to the use scene of the user to suppress noise; the control method reduces the volume of air conditioner noise, avoids the annoyance caused by noise, and improves the user experience.

[0067] Optionally, the embodiment of the application performs active noise reduction processing on the 120-degree direction angle in the area with more people through machine vision technology; the noise source is suppressed by outputting a reverse sound wave according to the collected parameters, and the air conditioner noise source is reduced; the daytime and nighttime modes are determined to distinguish the size of noise and suppress the noise.

[0068] Figure 3 A structure diagram of an active noise reduction control device of an air conditioner with adjustable angle is shown, the device comprises:

[0069] A user area determination module 301 is configured to determine the number of users in each area in the space where the air conditioner is located; each area is an area intersected by different sectors with the air conditioner as the center and the space;

[0070] A noise reduction direction adjustment module 302 is configured to adjust the position of an active noise reduction module, so that the noise reduction sound signal output by the active noise reduction module covers the area with the most users;

[0071] A noise reduction module 303 is configured to acquire an internal noise signal of the air conditioner, and control the active noise reduction module to directionally output a noise reduction sound signal according to the noise signal; the noise reduction sound signal has the same amplitude and opposite phase as the noise signal.

[0072] The active noise reduction control device with adjustable angle provided by the air conditioner can control logic, and can be widely used; the active noise reduction processing is performed on the user concentration area, so that the volume of the air conditioner noise is reduced, the adverse effects of the noise on the user are avoided, and the user experience is improved.

[0073] As a feasible way, each of the regions is a region intersected with the space where the air conditioner is located, and the region is a sector with the location of the air conditioner as a center and a preset central angle; the noise reduction sound signal output by the active noise reduction module covers a sector region with the location of the air conditioner as a center and the preset central angle.

[0074] As a feasible way, the preset central angle is 120°.

[0075] As a feasible way, the device further comprises a noise size judgment module, configured to: judge whether the noise signal is greater than a preset noise threshold; if yes, the active noise reduction module is controlled to directionally output the noise reduction sound signal according to the noise signal.

[0076] As a feasible way, if the air conditioner operates in a daytime mode, a first preset noise threshold is adopted; if the air conditioner operates in a night mode, a second preset noise threshold is adopted; the first preset noise threshold is greater than the second preset noise threshold.

[0077] As a feasible way, the device further comprises a data acquisition module, configured to: acquire a real-time video stream, and determine the number of users in each region in the space where the air conditioner is located according to the real-time video stream; or acquire radar data or infrared data, and determine the number of users in each region in the space where the air conditioner is located according to the radar data or the infrared data.

[0078] As a feasible way, if the air conditioner operates in an active noise reduction mode, the size of the noise signal does not need to be judged after the step of acquiring the internal noise signal of the air conditioner.

[0079] The embodiment of the application provides an air conditioner, comprising the active noise reduction control device with adjustable angle of the air conditioner.

[0080] The embodiment of the application provides a computer readable storage medium, the computer readable storage medium stores a computer program, and the computer program is read and run by a processor, so that the method provided in the above embodiment is realized, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here. The computer readable storage medium, such as read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk, etc.

[0081] Of course, those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the control device through the computer degree, and the program can be stored in a computer-readable storage medium. The program can include the processes of the above-mentioned method embodiments when executed, and the storage medium can be a memory, a disk, an optical disk, etc.

[0082] Although the present application is disclosed as above, the present application is not limited to this. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present application, and the protection scope of the present application should be defined by the scope defined in the claims.

[0083] Finally, it should also be noted that, in this document, the relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the element defined by the statement "including a" does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0084] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts between various embodiments can be referred to each other.

[0085] Although the present application is disclosed as above, the present application is not limited to this. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present application, and the protection scope of the present application should be defined by the scope defined in the claims.

Claims

1. A method for active noise reduction control of an air conditioner with an adjustable angle, characterized in that, The method includes: determining the number of users in each area within the space where the air conditioner is located; each area is a region where different sectors centered on the location of the air conditioner intersect with the space. Adjust the position of the active noise cancellation module so that the noise reduction signal output by the active noise cancellation module covers the area with the most users; The system acquires an internal noise signal from the air conditioner and controls the active noise reduction module to output a noise reduction signal in a directional manner based on the noise signal; the noise reduction signal has the same amplitude and opposite phase to the noise signal.

2. The method as described in claim 1, characterized in that, Each of the aforementioned areas is a sector centered on the location of the air conditioner with a predetermined central angle, intersecting with the space in which it is located; The noise reduction signal output by the active noise reduction module covers a fan-shaped area centered on the location of the air conditioner and the preset central angle.

3. The method as described in claim 1, characterized in that, The preset central angle is 120°.

4. The method as described in claim 1, characterized in that, After acquiring the internal noise signal of the air conditioner, the method further includes: Determine whether the noise signal is greater than a preset noise threshold; If so, then the active noise reduction module is controlled to output a noise reduction signal in a specific direction based on the noise signal.

5. The method as described in claim 4, characterized in that, If the air conditioner is operating in daytime mode, then the first preset noise threshold is used; If the air conditioner is operating in night mode, then the second preset noise threshold is used; The first preset noise threshold is greater than the second preset noise threshold.

6. The method as described in claim 1, characterized in that, The method further includes: Acquire real-time video streams, and determine the number of users in each area within the space where the air conditioner is located based on the real-time video streams; or, Collect radar or infrared data, and determine the number of users in each area of ​​the space where the air conditioner is located based on the radar or infrared data.

7. The method as described in claim 1, characterized in that, The method further includes: If the air conditioner is operating in active noise reduction mode, then after the step of acquiring the internal noise signal of the air conditioner, it is not necessary to determine the magnitude of the noise signal.

8. An active noise reduction control device for an air conditioner with an adjustable angle, characterized in that, The device includes: a user area determination module, used to determine the number of users in each area within the space where the air conditioner is located; each area is a region where different sectors centered on the location of the air conditioner intersect with the space. The noise reduction direction adjustment module is used to adjust the position of the active noise reduction module so that the noise reduction signal output by the active noise reduction module covers the area with the most users. A noise reduction module is used to acquire the noise signal inside the air conditioner and control the active noise reduction module to output a noise reduction signal in a directional manner according to the noise signal; the noise reduction signal has the same amplitude and opposite phase as the noise signal.

9. An air conditioner, characterized in that, It includes the active noise reduction control device for an adjustable air conditioner as described in claim 8.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program, which is read and executed by a processor to implement the active noise reduction control method for the adjustable angle of an air conditioner as described in any one of claims 1-6.

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