Unmanned aerial vehicle noise reduction method, system and readable storage medium

Abstract

The present invention discloses a method, system and readable storage medium for reducing noise of an unmanned aerial vehicle, wherein the method comprises: identifying a residential area on a predetermined driving trajectory of the unmanned aerial vehicle, and obtaining a flight altitude value and a remaining power value of the unmanned aerial vehicle when flying over the corresponding residential area; when the unmanned aerial vehicle flies to the corresponding residential area, judging whether the remaining power value exceeds a power safety value based on the corresponding remaining power value, wherein if the remaining power value exceeds the power safety value, the unmanned aerial vehicle is controlled to increase its flight altitude to fly over the residential area; if it does not exceed the remaining power value, the rotation speed of the propeller is reduced to slow down to fly over the residential area. The present invention can adjust the flight parameters of the unmanned aerial vehicle when approaching the corresponding residential area according to the distribution of residential areas on the flight trajectory of the unmanned aerial vehicle, thereby reducing the impact of the unmanned aerial vehicle's flight noise on the residential area.

Description

Technical Field

[0001] The present invention relates to the technical field of unmanned aerial vehicle operation, and more particularly to a method, system and readable storage medium for reducing noise of an unmanned aerial vehicle. Background Art

[0002] With the continuous development of science and technology, the application of unmanned aerial vehicles has achieved unprecedented development. Compared with manned aircraft, unmanned aerial vehicles are often more suitable for dangerous and repetitive mechanical tasks. Among them, the application of unmanned aerial vehicles in various industries, such as aerial photography, agriculture, plant protection, micro selfies, express transportation, disaster relief, wildlife observation, infectious disease monitoring, surveying and mapping, news reporting, power inspection, disaster relief, film and television shooting, creating romance, etc., has greatly expanded the use of unmanned aerial vehicles themselves.

[0003] With the continuous development of unmanned aerial vehicles, while bringing convenience and speed to people's daily life and production, it also brings corresponding problems, such as the disorderly takeoff and landing of unmanned aerial vehicles, or the noise problem of unmanned aerial vehicles, etc., which need to be solved urgently. Summary of the Invention

[0004] The purpose of the present invention is to provide a method, system and readable storage medium for reducing noise of unmanned aerial vehicles (UAVs), which can adjust the flight parameters of the UAV when approaching the corresponding residential area according to the distribution of residential areas on the UAV flight trajectory, thereby reducing the impact of the UAV's flight noise on the residential area.

[0005] A first aspect of the present invention provides a method for reducing noise of an unmanned aerial vehicle, comprising the following steps:

[0006] Identifying a residential area on the predetermined driving trajectory of the unmanned aerial vehicle, and obtaining a flight altitude value and a remaining battery value of the unmanned aerial vehicle when flying over the corresponding residential area;

[0007] When the unmanned aerial vehicle flies to the corresponding residential area, a determination is made based on the corresponding remaining power value whether it exceeds a power safety value, wherein:

[0008] If the remaining power value exceeds the power safety value, controlling the unmanned aerial vehicle to ascend based on the current flight altitude value to fly over the residential area;

[0009] If the remaining power value does not exceed the power safety value, the unmanned aerial vehicle is controlled to reduce the rotation speed of the flight propeller so as to fly over the residential area without exceeding a preset limit speed value.

[0010] In this solution, the identifying of a residential area on the predetermined driving trajectory of the unmanned aerial vehicle and obtaining a flight altitude value and a remaining battery value of the unmanned aerial vehicle when flying over the corresponding residential area specifically includes:

[0011] Identifying the distributed residential areas on the currently predetermined driving trajectory of the unmanned aerial vehicle based on preset 3D digital map data or satellite navigation data;

[0012] Based on the driving trajectory, the flight altitude value and the remaining power value in the flight trajectory data corresponding to the unmanned aerial vehicle flying to each of the residential areas are obtained, wherein each of the residential areas in the flight trajectory data corresponds to a set of altitude safety values, the power safety values ​​and the maximum speed values.

[0013] In this solution, when the unmanned aerial vehicle flies to the corresponding residential area, if the remaining power value exceeds the power safety value, the unmanned aerial vehicle is controlled to rise based on the current flight altitude value to fly over the residential area, specifically including:

[0014] When the unmanned aerial vehicle arrives at the residential area, if it is determined that the current remaining power value exceeds the power safety value, the unmanned aerial vehicle is controlled to increase the flight altitude value;

[0015] The ascending altitude value of the unmanned aerial vehicle is obtained based on the remaining power value and the power safety value, and the unmanned aerial vehicle is controlled to ascend based on the ascending altitude value.

[0016] In this solution, when the unmanned aerial vehicle flies to the corresponding residential area, if the remaining power value does not exceed the power safety value, the unmanned aerial vehicle is controlled to reduce the rotation speed of the propellers so as to fly over the residential area without exceeding a preset limit speed value, specifically including:

[0017] When the unmanned aerial vehicle arrives at a residential area, if it is determined that the current remaining power value does not exceed the corresponding power safety value, controlling the unmanned aerial vehicle to reduce the rotation speed of the propellers;

[0018] The corresponding limit speed value is extracted based on the current residential area, and the rotation speed of the flight propeller is reduced so that the flight speed of the unmanned aerial vehicle does not exceed the limit speed value.

[0019] In this embodiment, the method further includes adjusting the flight altitude value based on weather data of the residential area.

[0020] In this solution, the method further includes identifying a residential area level based on the residential area, thereby adjusting the speed limit value based on the residential area level.

[0021] A second aspect of the present invention further provides an unmanned aircraft noise reduction system, comprising a memory and a processor, wherein the memory includes an unmanned aircraft noise reduction method program, and when the unmanned aircraft noise reduction method program is executed by the processor, the following steps are implemented:

[0022] Identifying a residential area on the predetermined driving trajectory of the unmanned aerial vehicle, and obtaining a flight altitude value and a remaining battery value of the unmanned aerial vehicle when flying over the corresponding residential area;

[0023] When the unmanned aerial vehicle flies to the corresponding residential area, a determination is made based on the corresponding remaining power value whether it exceeds a power safety value, wherein:

[0024] If the remaining power value exceeds the power safety value, controlling the unmanned aerial vehicle to ascend based on the current flight altitude value to fly over the residential area;

[0025] If the remaining power value does not exceed the power safety value, the unmanned aerial vehicle is controlled to reduce the rotation speed of the flight propeller so as to fly over the residential area without exceeding a preset limit speed value.

[0026] In this solution, the identifying of a residential area on the predetermined driving trajectory of the unmanned aerial vehicle and obtaining a flight altitude value and a remaining battery value of the unmanned aerial vehicle when flying over the corresponding residential area specifically includes:

[0027] Identifying the distributed residential areas on the currently predetermined driving trajectory of the unmanned aerial vehicle based on preset 3D digital map data or satellite navigation data;

[0028] Based on the driving trajectory, the flight altitude value and the remaining power value in the flight trajectory data corresponding to the unmanned aerial vehicle flying to each of the residential areas are obtained, wherein each of the residential areas in the flight trajectory data corresponds to a set of altitude safety values, the power safety values ​​and the maximum speed values.

[0029] In this solution, when the unmanned aerial vehicle flies to the corresponding residential area, if the remaining power value exceeds the power safety value, the unmanned aerial vehicle is controlled to rise based on the current flight altitude value to fly over the residential area, specifically including:

[0030] When the unmanned aerial vehicle arrives at the residential area, if it is determined that the current remaining power value exceeds the power safety value, the unmanned aerial vehicle is controlled to increase the flight altitude value;

[0031] The ascending altitude value of the unmanned aerial vehicle is obtained based on the remaining power value and the power safety value, and the unmanned aerial vehicle is controlled to ascend based on the ascending altitude value.

[0032] In this solution, when the unmanned aerial vehicle flies to the corresponding residential area, if the remaining power value does not exceed the power safety value, the unmanned aerial vehicle is controlled to reduce the rotation speed of the propellers so as to fly over the residential area without exceeding a preset limit speed value, specifically including:

[0033] When the unmanned aerial vehicle arrives at a residential area, if it is determined that the current remaining power value does not exceed the corresponding power safety value, controlling the unmanned aerial vehicle to reduce the rotation speed of the propellers;

[0034] The corresponding limit speed value is extracted based on the current residential area, and the rotation speed of the flight propeller is reduced so that the flight speed of the unmanned aerial vehicle does not exceed the limit speed value.

[0035] In this embodiment, the method further includes adjusting the flight altitude value based on weather data of the residential area.

[0036] In this solution, the method further includes identifying a residential area level based on the residential area, thereby adjusting the speed limit value based on the residential area level.

[0037] A third aspect of the present invention provides a computer-readable storage medium, which includes a machine-readable unmanned aircraft noise reduction method program. When the unmanned aircraft noise reduction method program is executed by a processor, the steps of the unmanned aircraft noise reduction method as described in any one of the above items are implemented.

[0038] The present invention discloses a method, system, and readable storage medium for reducing noise from an unmanned aerial vehicle (UAV). The method can adjust the flight parameters of an UAV when it approaches a corresponding residential area based on the distribution of residential areas along the UAV's flight trajectory, thereby reducing the impact of the UAV's flight noise on the residential area. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 A flow chart of a method for reducing noise of an unmanned aerial vehicle according to the present invention is shown;

[0040] Figure 2 A block diagram of a noise reduction system for an unmanned aerial vehicle according to the present invention is shown. DETAILED DESCRIPTION

[0041] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features therein can be combined with each other.

[0042] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0043] Figure 1 A flow chart of a method for reducing noise of an unmanned aerial vehicle according to the present application is shown.

[0044] like Figure 1 As shown, the present application discloses a method for reducing noise of an unmanned aerial vehicle, comprising the following steps:

[0045] S102, identifying a residential area on the predetermined driving trajectory of the unmanned aerial vehicle, and obtaining a flight altitude value and a remaining battery value of the unmanned aerial vehicle when flying over the corresponding residential area;

[0046] S104, when the unmanned aerial vehicle flies to the corresponding residential area, determining whether the remaining power value exceeds a power safety value based on the corresponding remaining power value;

[0047] S106, if the remaining power value exceeds the power safety value, controlling the unmanned aerial vehicle to ascend based on the current flight altitude value to fly over the residential area;

[0048] S108: If the remaining power value does not exceed the power safety value, control the unmanned aerial vehicle to reduce the rotation speed of the flight propeller so as to fly over the residential area without exceeding a preset limit speed value.

[0049] It should be noted that, in this embodiment, when the unmanned aerial vehicle is flying based on its established driving trajectory, it can identify residential areas on the path based on the driving trajectory, and obtain the flight altitude value and remaining power value of the unmanned aerial vehicle corresponding to different residential areas, as well as the power safety value and maximum speed value corresponding to the residential area. When the unmanned aerial vehicle arrives at a residential area, a comparison is made based on the current remaining power value and the corresponding power safety value. If the remaining power value exceeds the power safety value, the unmanned aerial vehicle is controlled to rise based on the current flight altitude value to fly over the residential area. Residential area, to consume electric energy so that the unmanned aerial vehicle is away from residential area, so as to reduce the impact of noise on residential area; if the remaining power value does not exceed the power safety value, the unmanned aerial vehicle is controlled to reduce the rotation speed of the flight propeller to fly over the residential area without exceeding the preset limit speed value. In this case, in order to reduce the impact of noise on residential area, the rotation speed of the flight propeller can be reduced to reduce the decibel of noise when passing through the residential area. Different residential areas correspond to different limit speed values, and then the corresponding limit speed values ​​can be obtained according to different residential areas to reduce the rotation speed of the flight propeller, thereby reducing the flight speed of the unmanned aerial vehicle to not exceed the limit speed value when flying over residential area.

[0050] According to an embodiment of the present invention, identifying a residential area on a predetermined driving trajectory of the unmanned aerial vehicle and obtaining a flight altitude value and a remaining battery value of the unmanned aerial vehicle when flying over the corresponding residential area specifically includes:

[0051] Identifying the distributed residential areas on the currently predetermined driving trajectory of the unmanned aerial vehicle based on preset 3D digital map data or satellite navigation data;

[0052] Based on the driving trajectory, the flight altitude value and the remaining power value in the flight trajectory data corresponding to the unmanned aerial vehicle flying to each of the residential areas are obtained, wherein each of the residential areas in the flight trajectory data corresponds to a set of altitude safety values, the power safety values ​​and the maximum speed values.

[0053] It should be noted that, in this embodiment, the driving trajectory is known, so it is only necessary to obtain the location of the residential area based on the driving trajectory. Specifically, the residential areas distributed on the driving trajectory can be identified by matching the current driving trajectory with the 3D digital map data or the satellite navigation data. Then, based on the distribution of the residential areas on the driving trajectory, the corresponding flight altitude value and the remaining power value when the unmanned aerial vehicle arrives at different residential areas, that is, the flight trajectory data, can be obtained. Accordingly, each residential area corresponds to a height safety value, a power safety value and a speed limit value.

[0054] According to an embodiment of the present invention, when the unmanned aerial vehicle flies to the corresponding residential area, if the remaining power value exceeds the power safety value, controlling the unmanned aerial vehicle to rise based on the current flight altitude value to fly over the residential area specifically includes:

[0055] When the unmanned aerial vehicle arrives at the residential area, if it is determined that the current remaining power value exceeds the power safety value, the unmanned aerial vehicle is controlled to increase the flight altitude value;

[0056] The ascending altitude value of the unmanned aerial vehicle is obtained based on the remaining power value and the power safety value, and the unmanned aerial vehicle is controlled to ascend based on the ascending altitude value.

[0057] It should be noted that, in this embodiment, when the remaining power value exceeds the power safety value, the ascent altitude value may be determined based on the difference between the remaining power value and the power safety value, and then the unmanned aerial vehicle is controlled to ascend based on the ascent altitude value. The calculation formula for determining the ascent altitude value is as follows:

[0058] H e =(E r -E s )δ / v s ;

[0059] Among them, E r is the remaining power value, E s is the safety value of the power, H e is the height of the rise, δ is the power loss factor, v s This is the standard flight speed.

[0060] According to an embodiment of the present invention, when the unmanned aerial vehicle flies to the corresponding residential area, if the remaining power value does not exceed the power safety value, controlling the unmanned aerial vehicle to reduce the rotation speed of the propellers so as to fly over the residential area without exceeding a preset limit speed value specifically includes:

[0061] When the unmanned aerial vehicle arrives at a residential area, if it is determined that the current remaining power value does not exceed the corresponding power safety value, controlling the unmanned aerial vehicle to reduce the rotation speed of the propellers;

[0062] The corresponding limit speed value is extracted based on the current residential area, and the rotation speed of the flight propeller is reduced so that the flight speed of the unmanned aerial vehicle does not exceed the limit speed value.

[0063] It should be noted that, in this embodiment, when the remaining power value does not exceed the power safety value, the technology reduces the rotation speed of the flight propeller to reduce the flight speed of the unmanned aerial vehicle, so that the flight speed does not exceed the corresponding limit speed value, and then flies over the residential area based on the corresponding flight speed, wherein the limit speed values ​​corresponding to different residential areas may be different, so the amount of reducing the rotation speed to reduce the flight speed needs to be determined based on different limit speed values. In actual operation, while reducing the flight speed, the current reduced flight speed and the limit speed value are judged. As long as the flight speed does not exceed the corresponding limit speed value, the unmanned aerial vehicle can be controlled to fly over the residential area.

[0064] According to an embodiment of the present invention, the method further comprises adjusting the flight altitude value based on weather data of the residential area.

[0065] It should be noted that in this embodiment, due to the sunny weather and rainy weather in the weather data, different flight altitudes have different impacts on the noise in the same residential area. Therefore, the flight altitude value can be adjusted based on the weather data of the residential area, wherein the flight altitude value corresponding to the sunny weather is greater than the flight altitude value corresponding to the rainy weather.

[0066] According to an embodiment of the present invention, the method further includes identifying a residential area level based on the residential area, thereby adjusting the speed limit value based on the residential area level.

[0067] It should be noted that, in this embodiment, different residential areas have different residential area levels due to different populations or other reasons. Therefore, different residential areas correspond to different speed limit values. The higher the residential area level, the lower the speed limit value. The calculation formula is as follows:

[0068] v l =v s -μS l ;

[0069] Among them, S l is the residential area grade, μ is the speed reduction factor, vl is the limit speed value, v s is the standard flight speed.

[0070] It is worth mentioning that the method further includes obtaining the weather data of the residential area, specifically including:

[0071] Acquiring location data of each residential area based on the driving trajectory;

[0072] The weather data corresponding to each of the residential areas is obtained based on the residential area location data and a preset weather forecast.

[0073] It should be noted that in this embodiment, since the above embodiment describes that different weather factors will affect the flight altitude value, it is necessary to obtain weather data in this embodiment, specifically obtaining the weather data based on the location of different residential areas combined with the local weather forecast.

[0074] It is worth mentioning that when the rotation speed of the flying propeller is reduced, the reduced flying speed cannot be lower than the safe speed.

[0075] It should be noted that in this embodiment, different unmanned aerial vehicles have a safe speed when flying in the air, and cannot be lower than the safe speed, otherwise it will cause problems such as stalling. Therefore, when the rotation speed of the flight propeller is reduced to reduce the flight speed, the reduced flight speed cannot be lower than the safe speed.

[0076] It is worth mentioning that the method further includes determining whether the current flight altitude of the unmanned aerial vehicle is greater than the altitude safety value, specifically including:

[0077] Obtaining the high safety value corresponding to the residential area;

[0078] Obtain the flight altitude value, and determine the difference between the flight altitude value and the height safety value, wherein:

[0079] If the flight altitude value is greater than or equal to the altitude safety value, no adjustment is made;

[0080] If the flight altitude value is less than the altitude safety value, the flight altitude value of the unmanned aerial vehicle is increased.

[0081] It should be noted that in this embodiment, since each residential area has height requirements in addition to noise reduction requirements, the flight altitude affects the noise level to a certain extent. Therefore, when the flight altitude value of the unmanned aerial vehicle is less than the height safety value, the flight altitude of the unmanned aerial vehicle needs to be increased so that it is greater than or equal to the height safety value.

[0082] Figure 2 A block diagram of a noise reduction system for an unmanned aerial vehicle according to the present invention is shown.

[0083] like Figure 2 As shown, the present invention discloses an unmanned aircraft noise reduction system, including a memory and a processor. The memory includes an unmanned aircraft noise reduction method program. When the unmanned aircraft noise reduction method program is executed by the processor, the following steps are implemented:

[0084] Identifying a residential area on the predetermined driving trajectory of the unmanned aerial vehicle, and obtaining a flight altitude value and a remaining battery value of the unmanned aerial vehicle when flying over the corresponding residential area;

[0085] When the unmanned aerial vehicle flies to the corresponding residential area, a determination is made based on the corresponding remaining power value whether it exceeds a power safety value, wherein:

[0086] If the remaining power value exceeds the power safety value, controlling the unmanned aerial vehicle to ascend based on the current flight altitude value to fly over the residential area;

[0087] If the remaining power value does not exceed the power safety value, the unmanned aerial vehicle is controlled to reduce the rotation speed of the flight propeller so as to fly over the residential area without exceeding a preset limit speed value.

[0088] It should be noted that, in this embodiment, when the unmanned aerial vehicle is flying based on its established driving trajectory, it can identify residential areas on the path based on the driving trajectory, and obtain the flight altitude value and remaining power value of the unmanned aerial vehicle corresponding to different residential areas, as well as the power safety value and maximum speed value corresponding to the residential area. When the unmanned aerial vehicle arrives at a residential area, a comparison is made based on the current remaining power value and the corresponding power safety value. If the remaining power value exceeds the power safety value, the unmanned aerial vehicle is controlled to rise based on the current flight altitude value to fly over the residential area. Residential area, to consume electric energy so that the unmanned aerial vehicle is away from residential area, so as to reduce the impact of noise on residential area; if the remaining power value does not exceed the power safety value, the unmanned aerial vehicle is controlled to reduce the rotation speed of the flight propeller to fly over the residential area without exceeding the preset limit speed value. In this case, in order to reduce the impact of noise on residential area, the rotation speed of the flight propeller can be reduced to reduce the decibel of noise when passing through the residential area. Different residential areas correspond to different limit speed values, and then the corresponding limit speed values ​​can be obtained according to different residential areas to reduce the rotation speed of the flight propeller, thereby reducing the flight speed of the unmanned aerial vehicle to not exceed the limit speed value when flying over residential area.

[0089] According to an embodiment of the present invention, identifying a residential area on a predetermined driving trajectory of the unmanned aerial vehicle and obtaining a flight altitude value and a remaining battery value of the unmanned aerial vehicle when flying over the corresponding residential area specifically includes:

[0090] Identifying the distributed residential areas on the currently predetermined driving trajectory of the unmanned aerial vehicle based on preset 3D digital map data or satellite navigation data;

[0091] Based on the driving trajectory, the flight altitude value and the remaining power value in the flight trajectory data corresponding to the unmanned aerial vehicle flying to each of the residential areas are obtained, wherein each of the residential areas in the flight trajectory data corresponds to a set of altitude safety values, the power safety values ​​and the maximum speed values.

[0092] It should be noted that, in this embodiment, the driving trajectory is known, so it is only necessary to obtain the location of the residential area based on the driving trajectory. Specifically, the residential areas distributed on the driving trajectory can be identified by matching the current driving trajectory with the 3D digital map data or the satellite navigation data. Then, based on the distribution of the residential areas on the driving trajectory, the corresponding flight altitude value and the remaining power value when the unmanned aerial vehicle arrives at different residential areas, that is, the flight trajectory data, can be obtained. Accordingly, each residential area corresponds to a height safety value, a power safety value and a speed limit value.

[0093] According to an embodiment of the present invention, when the unmanned aerial vehicle flies to the corresponding residential area, if the remaining power value exceeds the power safety value, controlling the unmanned aerial vehicle to rise based on the current flight altitude value to fly over the residential area specifically includes:

[0094] When the unmanned aerial vehicle arrives at the residential area, if it is determined that the current remaining power value exceeds the power safety value, the unmanned aerial vehicle is controlled to increase the flight altitude value;

[0095] The ascending altitude value of the unmanned aerial vehicle is obtained based on the remaining power value and the power safety value, and the unmanned aerial vehicle is controlled to ascend based on the ascending altitude value.

[0096] It should be noted that, in this embodiment, when the remaining power value exceeds the power safety value, the ascent altitude value may be determined based on the difference between the remaining power value and the power safety value, and then the unmanned aerial vehicle is controlled to ascend based on the ascent altitude value. The calculation formula for determining the ascent altitude value is as follows:

[0097] He =(E r -E s )δ / v s ;

[0098] Among them, E r is the remaining power value, E s is the safety value of the power, H e is the height of the rise, δ is the power loss factor, v s This is the standard flight speed.

[0099] According to an embodiment of the present invention, when the unmanned aerial vehicle flies to the corresponding residential area, if the remaining power value does not exceed the power safety value, controlling the unmanned aerial vehicle to reduce the rotation speed of the propellers so as to fly over the residential area without exceeding a preset limit speed value specifically includes:

[0100] When the unmanned aerial vehicle arrives at a residential area, if it is determined that the current remaining power value does not exceed the corresponding power safety value, controlling the unmanned aerial vehicle to reduce the rotation speed of the propellers;

[0101] The corresponding limit speed value is extracted based on the current residential area, and the rotation speed of the flight propeller is reduced so that the flight speed of the unmanned aerial vehicle does not exceed the limit speed value.

[0102] It should be noted that, in this embodiment, when the remaining power value does not exceed the power safety value, the technology reduces the rotation speed of the flight propeller to reduce the flight speed of the unmanned aerial vehicle, so that the flight speed does not exceed the corresponding limit speed value, and then flies over the residential area based on the corresponding flight speed, wherein the limit speed values ​​corresponding to different residential areas may be different, so the amount of reducing the rotation speed to reduce the flight speed needs to be determined based on different limit speed values. In actual operation, while reducing the flight speed, the current reduced flight speed and the limit speed value are judged. As long as the flight speed does not exceed the corresponding limit speed value, the unmanned aerial vehicle can be controlled to fly over the residential area.

[0103] According to an embodiment of the present invention, the method further comprises adjusting the flight altitude value based on weather data of the residential area.

[0104] It should be noted that in this embodiment, due to the sunny weather and rainy weather in the weather data, different flight altitudes have different impacts on the noise in the same residential area. Therefore, the flight altitude value can be adjusted based on the weather data of the residential area, wherein the flight altitude value corresponding to the sunny weather is greater than the flight altitude value corresponding to the rainy weather.

[0105] According to an embodiment of the present invention, the method further includes identifying a residential area level based on the residential area, thereby adjusting the speed limit value based on the residential area level.

[0106] It should be noted that, in this embodiment, different residential areas have different residential area levels due to different populations or other reasons. Therefore, different residential areas correspond to different speed limit values. The higher the residential area level, the lower the speed limit value. The calculation formula is as follows:

[0107] v l =v s -μS l ;

[0108] Among them, S l is the residential area grade, μ is the speed reduction factor, v l is the limit speed value, v s is the standard flight speed.

[0109] It is worth mentioning that the method further includes obtaining the weather data of the residential area, specifically including:

[0110] Acquiring location data of each residential area based on the driving trajectory;

[0111] The weather data corresponding to each of the residential areas is obtained based on the residential area location data and a preset weather forecast.

[0112] It should be noted that in this embodiment, since the above embodiment describes that different weather factors will affect the flight altitude value, it is necessary to obtain weather data in this embodiment, specifically obtaining the weather data based on the location of different residential areas combined with the local weather forecast.

[0113] It is worth mentioning that when the rotation speed of the flying propeller is reduced, the reduced flying speed cannot be lower than the safe speed.

[0114] It should be noted that in this embodiment, different unmanned aerial vehicles have a safe speed when flying in the air, and cannot be lower than the safe speed, otherwise it will cause problems such as stalling. Therefore, when the rotation speed of the flight propeller is reduced to reduce the flight speed, the reduced flight speed cannot be lower than the safe speed.

[0115] It is worth mentioning that the method further includes determining whether the current flight altitude of the unmanned aerial vehicle is greater than the altitude safety value, specifically including:

[0116] Obtaining the high safety value corresponding to the residential area;

[0117] Obtain the flight altitude value, and determine the difference between the flight altitude value and the height safety value, wherein:

[0118] If the flight altitude value is greater than or equal to the altitude safety value, no adjustment is made;

[0119] If the flight altitude value is less than the altitude safety value, the flight altitude value of the unmanned aerial vehicle is increased.

[0120] It should be noted that in this embodiment, since each residential area has height requirements in addition to noise reduction requirements, the flight altitude affects the noise level to a certain extent. Therefore, when the flight altitude value of the unmanned aerial vehicle is less than the height safety value, the flight altitude of the unmanned aerial vehicle needs to be increased so that it is greater than or equal to the height safety value.

[0121] A third aspect of the present invention provides a computer-readable storage medium, which includes a program for a method for reducing noise of an unmanned aircraft. When the program for reducing noise of an unmanned aircraft is executed by a processor, the steps of the method for reducing noise of an unmanned aircraft as described in any one of the above items are implemented.

[0122] The present invention discloses a method, system, and readable storage medium for reducing noise from an unmanned aerial vehicle (UAV). The method can adjust the flight parameters of an UAV when it approaches a corresponding residential area based on the distribution of residential areas along the UAV's flight trajectory, thereby reducing the impact of the UAV's flight noise on the residential area.

[0123] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as: multiple units or components can be combined, or can be integrated into another system, or some features can be ignored or not executed. In addition, the coupling, direct coupling, or communication connection between the components shown or discussed can be through some interfaces, and the indirect coupling or communication connection of the devices or units can be electrical, mechanical or other forms.

[0124] The units described above as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units; they may be located in one place or distributed across multiple network units; some or all of the units may be selected according to actual needs to achieve the purpose of the scheme of this embodiment.

[0125] In addition, all functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may be separately used as a unit, or two or more units may be integrated into one unit; the above-mentioned integrated units may be implemented in the form of hardware or in the form of hardware plus software functional units.

[0126] Those skilled in the art will understand that all or part of the steps for implementing the above-mentioned method embodiments can be completed by hardware related to program instructions, and the aforementioned program can be stored in a computer-readable storage medium. When the program is executed, it executes the steps of the above-mentioned method embodiments; and the aforementioned storage medium includes: mobile storage devices, read-only memories (ROM), random access memories (RAM), magnetic disks or optical disks, and other media that can store program codes.

[0127] Alternatively, if the above-mentioned integrated unit of the present invention is implemented in the form of a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the embodiment of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a number of instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the methods described in each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as mobile storage devices, ROM, RAM, magnetic disks or optical disks.

Claims

1. A method for reducing noise of an unmanned aerial vehicle, characterized in that: The following steps are involved: Identifying a residential area on the predetermined driving trajectory of the unmanned aerial vehicle, and obtaining a flight altitude value and a remaining battery value of the unmanned aerial vehicle when flying over the corresponding residential area; When the unmanned aerial vehicle flies to the corresponding residential area, determining whether the remaining power value exceeds a power safety value based on the corresponding remaining power value, wherein if the remaining power value exceeds the power safety value, controlling the unmanned aerial vehicle to ascend based on the current flight altitude value to fly over the residential area specifically includes: When the unmanned aerial vehicle arrives at the residential area, if it is determined that the current remaining power value exceeds the power safety value, the unmanned aerial vehicle is controlled to increase the flight altitude value; deriving a lift height value for the unmanned aerial vehicle based on the remaining power value and the power safety value, and then controlling the unmanned aerial vehicle to ascend based on the lift height value; If the remaining power value does not exceed the power safety value, controlling the unmanned aerial vehicle to reduce the rotation speed of the propellers so as to fly over the residential area without exceeding a preset limit speed value; Based on the residential area, the residential area level is identified, and the speed limit value is adjusted based on the residential area level. The calculation formula is: ,in, is the residential area level, is the speed reduction factor, is the limit speed value, This is the standard flight speed.

2. The method for reducing noise of an unmanned aerial vehicle according to claim 1, wherein: The identifying of a residential area on the predetermined driving trajectory of the unmanned aerial vehicle and obtaining a flight altitude value and a remaining battery value of the unmanned aerial vehicle when flying over the corresponding residential area specifically includes: Identifying the distributed residential areas on the currently predetermined driving trajectory of the unmanned aerial vehicle based on preset 3D digital map data or satellite navigation data; Based on the driving trajectory, the flight altitude value and the remaining power value in the flight trajectory data corresponding to the unmanned aerial vehicle flying to each of the residential areas are obtained, wherein each of the residential areas in the flight trajectory data corresponds to a set of altitude safety values, the power safety values ​​and the maximum speed values.

3. The method for reducing noise of an unmanned aerial vehicle according to claim 1, wherein: When the unmanned aerial vehicle flies to the corresponding residential area, if the remaining power value does not exceed the power safety value, controlling the unmanned aerial vehicle to reduce the rotation speed of the propellers so as not to exceed a preset limit speed value to fly over the residential area, specifically including: When the unmanned aerial vehicle arrives at a residential area, if it is determined that the current remaining power value does not exceed the corresponding power safety value, controlling the unmanned aerial vehicle to reduce the rotation speed of the propellers; The corresponding limit speed value is extracted based on the current residential area, and the rotation speed of the flight propeller is reduced so that the flight speed of the unmanned aerial vehicle does not exceed the limit speed value.

4. The method for reducing noise of an unmanned aerial vehicle according to claim 1, wherein: The method also includes adjusting the flight altitude value based on weather data for the populated area.

5. An unmanned aerial vehicle noise reduction system, characterized in that: The system comprises a memory and a processor, wherein the memory comprises an unmanned aircraft noise reduction method program, and when the unmanned aircraft noise reduction method program is executed by the processor, the following steps are implemented: Identifying a residential area on the predetermined driving trajectory of the unmanned aerial vehicle, and obtaining a flight altitude value and a remaining battery value of the unmanned aerial vehicle when flying over the corresponding residential area; When the unmanned aerial vehicle flies to the corresponding residential area, determining whether the remaining power value exceeds a power safety value based on the corresponding remaining power value, wherein if the remaining power value exceeds the power safety value, controlling the unmanned aerial vehicle to ascend based on the current flight altitude value to fly over the residential area specifically includes: When the unmanned aerial vehicle arrives at the residential area, if it is determined that the current remaining power value exceeds the power safety value, the unmanned aerial vehicle is controlled to increase the flight altitude value; deriving a lift height value for the unmanned aerial vehicle based on the remaining power value and the power safety value, and then controlling the unmanned aerial vehicle to ascend based on the lift height value; If the remaining power value does not exceed the power safety value, controlling the unmanned aerial vehicle to reduce the rotation speed of the propellers so as to fly over the residential area without exceeding a preset limit speed value; Based on the residential area, the residential area level is identified, and the speed limit value is adjusted based on the residential area level. The calculation formula is: ,in, is the residential area level, is the speed reduction factor, is the limit speed value, This is the standard flight speed.

6. The unmanned aerial vehicle noise reduction system according to claim 5, characterized in that: The identifying of a residential area on the predetermined driving trajectory of the unmanned aerial vehicle and obtaining a flight altitude value and a remaining battery value of the unmanned aerial vehicle when flying over the corresponding residential area specifically includes: Identifying the distributed residential areas on the currently predetermined driving trajectory of the unmanned aerial vehicle based on preset 3D digital map data or satellite navigation data; Based on the driving trajectory, the flight altitude value and the remaining power value in the flight trajectory data corresponding to the unmanned aerial vehicle flying to each of the residential areas are obtained, wherein each of the residential areas in the flight trajectory data corresponds to a set of altitude safety values, the power safety values ​​and the maximum speed values.

7. A computer-readable storage medium, characterized in that The computer-readable storage medium includes a UAV noise reduction method program. When the UAV noise reduction method program is executed by a processor, the steps of the UAV noise reduction method according to any one of claims 1 to 4 are implemented.

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