Highway acoustic control method, layout method, edge controller and system

Abstract

Embodiments of the application disclose a highway acoustic control method, a layout method, an edge controller and a system. The highway acoustic control system adopts a "cloud-edge-end" architecture, various types of acoustic devices and information collection devices are deployed along the highway, the edge controller is deployed at the edge, and the server is deployed in the highway command center. The edge controller dynamically analyzes the noise information collected by the information collection device through the acoustic control algorithm and the acoustic recognition algorithm, and adjusts the output volume of the acoustic device. The server can uniformly schedule and control all acoustic devices in the road network through multiple edge controllers. The edge controller of the application can ensure that the driver and passenger can clearly and completely obtain the warning information, avoid damage caused by the acoustic device playing at high volume all the time, and reduce noise pollution to residential areas by implementing the highway acoustic control method and the layout method.

Description

Technical Field

[0001] This application relates to the field of highway safety management, and more specifically, to highway acoustic control methods, deployment methods, edge controllers and systems. Background Technology

[0002] Vehicles travel at high speeds on highways, resulting in a higher rate of injuries and fatalities in the event of an accident. This is especially true in secondary accidents triggered by a primary incident, where high-speed vehicles often collide with stationary vehicles and pedestrians, leading to even more severe injuries and property damage.

[0003] Currently, highways often use cameras to monitor vehicle traffic conditions and generate warnings or control measures when dangerous situations are detected. These measures are implemented through broadcasts, screen displays, and light warnings to remind vehicles to pay attention to safety.

[0004] However, existing broadcast systems used on highways suffer from problems such as poor warning effectiveness and disturbance to nearby residents. Drivers and passengers report issues including: the broadcast volume being too low to hear clearly; the volume being too high, causing auditory discomfort; or the broadcast content not being fully understood. Furthermore, broadcast systems are prone to damage, rendering them unusable, and the long length of highways makes accurately identifying and locating damaged broadcasts during maintenance difficult. Summary of the Invention

[0005] The main objective of this invention is to propose a method, deployment method, edge controller and system for acoustic control of highways, in order to solve the above-mentioned problems existing in the prior art.

[0006] To achieve the above objectives, the present invention provides a highway acoustic control method, characterized in that it is applied to an edge controller, the edge controller being communicatively connected to multiple acoustic devices, the multiple acoustic devices being arranged along the highway; the method includes:

[0007] Road condition information is determined based on the environmental information of the expressway, wherein the environmental information includes environmental sound information and the road condition information includes abnormal event information and traffic flow information;

[0008] Multiple warning messages are determined based on the road condition information, each warning message corresponds to one of the acoustic devices, and the multiple warning messages are used to warn vehicles on the highway.

[0009] Based on the content of each warning message and the traffic flow information, a first target road segment that the corresponding acoustic device needs to cover is determined, so that the acoustic device can play the warning message completely while the vehicle passes through any of the first target road segments;

[0010] Based on the ambient sound information and each first target road segment, determine the playback volume of the corresponding acoustic device so that the vehicles in each first target road segment can receive the corresponding warning information.

[0011] Control each of the acoustic devices to repeatedly play the corresponding warning information at the corresponding playback volume.

[0012] In some embodiments, determining the first target road segment that the acoustic device needs to cover based on the content of each warning message and the traffic flow information, so that the acoustic device can fully play the warning message while the vehicle passes through any of the first target road segments, includes:

[0013] The playback duration of each warning message is determined based on its content.

[0014] Based on the traffic flow information, determine the vehicle speed on the highway;

[0015] The length of each first target road segment is determined, and the length is equal to a preset multiple of the product of the corresponding playback duration and the traffic flow speed.

[0016] In some embodiments, the method includes:

[0017] The ambient sound volume corresponding to each acoustic device is determined based on the ambient sound information.

[0018] According to preset rules, a first volume corresponding to each ambient sound volume is determined. The first volume is higher than the ambient sound volume by a preset volume value, so that the vehicle can receive the warning information corresponding to the first volume.

[0019] Based on each first volume and the length of the corresponding first target road segment, a corresponding playback volume is determined so that when the corresponding acoustic device plays at the playback volume, the volume at the end of the first target road segment away from the corresponding acoustic device is equal to the first volume.

[0020] In some embodiments, the highway runs through residential areas;

[0021] The method includes:

[0022] Based on the location of the residential area and the plurality of acoustic devices, a volume threshold corresponding to each of the acoustic devices is determined so that the volume of the warning information received by the residential area is less than a preset volume;

[0023] When the playback volume is greater than the corresponding volume threshold, the ambient sound volume corresponding to each acoustic device is determined according to the ambient sound information, and the corresponding second target road segment is determined according to the volume threshold and the ambient sound volume; when the acoustic device plays at the volume threshold, the volume of the warning information received by the vehicle in the second target road segment is at least higher than the ambient sound volume by a preset volume value.

[0024] Based on the second target road segment and the traffic flow information, the corresponding warning information is adjusted so that the acoustic device can fully play the adjusted warning information while the vehicle passes through any of the second target road segments;

[0025] The corresponding acoustic device is controlled to repeatedly play the adjusted warning information at the volume threshold.

[0026] In some embodiments, the adjustment of the corresponding warning information includes:

[0027] At least one of the following: reducing the content of the warning message or speeding up the playback speed of the warning message.

[0028] In some embodiments, the edge controller is also communicatively connected to multiple information acquisition devices arranged along the highway.

[0029] The method includes:

[0030] Receive the environmental information uploaded by the plurality of information collection devices;

[0031] Based on the warning information collected by the information collection device, the fault status of the corresponding acoustic device is determined.

[0032] Furthermore, to achieve the above objectives, the present invention also provides an edge controller, characterized in that it includes a processor and a memory that communicate with each other, the processor being configured to retrieve a computer program from the memory and implement the method as described in any of the foregoing embodiments by running the computer program.

[0033] Furthermore, to achieve the above objectives, the present invention also provides a method for deploying acoustic equipment in a highway acoustic control system, characterized in that it is applied to an edge controller, and the method includes:

[0034] Based on the historical road condition information of the expressway, multiple early warning messages are determined. The historical road condition information includes historical abnormal event information and historical traffic flow information. Each early warning message is played by the corresponding acoustic device to warn vehicles on the corresponding section of the expressway.

[0035] Based on each warning message and the corresponding road segment, multiple deployment locations are determined, and each deployment location is used to deploy the corresponding acoustic device;

[0036] Based on the warning information and historical traffic flow information corresponding to each deployment location, the first target road segment that the corresponding acoustic device needs to cover is determined, so that the acoustic device can play the warning information completely while the vehicle passes through any of the first target road segments;

[0037] Based on each first target road segment and its corresponding historical ambient sound information, a target volume corresponding to each acoustic device is determined, so that when the acoustic device plays the corresponding warning information at the corresponding target volume, the vehicles in each first target road segment can receive the corresponding warning information.

[0038] According to preset rules, the upper limit of the volume output of the acoustic device corresponding to the target volume is determined.

[0039] In some embodiments, the highway runs through residential areas;

[0040] The method includes:

[0041] The coverage angle of the acoustic device is determined based on the multiple deployment locations and the location of the residential area:

[0042] When the deployment location is less than a preset distance from the residential area, the coverage angle of the acoustic device is determined to be a first angle, and the first angle is 15 degrees.

[0043] When the deployment location is greater than or equal to a preset distance from the residential area, the coverage angle of the acoustic device is determined to be a second angle, which is greater than the first angle.

[0044] Furthermore, to achieve the above objectives, the present invention also provides a highway acoustic control system, characterized in that the system comprises:

[0045] server;

[0046] Multiple edge controllers, as described in the foregoing embodiments, are communicatively connected to the server;

[0047] Multiple acoustic devices are deployed using the method described in the foregoing embodiments and are communicatively connected to the edge controller;

[0048] Multiple information acquisition devices are communicatively connected to the edge controller to collect environmental sound information of the highway and send it to the edge controller.

[0049] The proposed highway acoustic control method determines the first target road segment to be covered by the acoustic equipment based on warning information and traffic flow information. The length of the first target road segment ensures that the acoustic equipment can fully play the warning information while vehicles are passing through it, thus guaranteeing that drivers and passengers have sufficient time to receive the complete warning information. Furthermore, the playback volume of the acoustic equipment is determined based on ambient sound information and the first target road segment, ensuring that all vehicles within the first target road segment can receive the warning information, thus guaranteeing that drivers and passengers in vehicles within the first target road segment can clearly hear the broadcast content.

[0050] This application also analyzes the ambient sound volume in the ambient sound information and adjusts the playback volume according to the ambient sound volume and the length of the first target road segment, so that the volume of the warning information received at the end of the first target road segment, which is far from the acoustic device, is equal to the first volume, wherein the first volume is higher than the ambient sound volume by a preset volume value. Therefore, by judging the noise level of the environment and adaptively adjusting the playback volume of the acoustic device, this application improves the acoustic playback effect while ensuring that the environmental signal-to-noise ratio within the first target road segment is within a reasonable range, thus avoiding the situation where the acoustic device plays at a high volume continuously, which could lead to hearing discomfort for drivers and passengers and damage to the acoustic device.

[0051] When controlling acoustic devices near residential areas, this application prioritizes limiting the volume threshold of the acoustic devices to prevent noise pollution. Based on the volume threshold, it determines the effective coverage area of ​​the warning information, thus identifying the second target road segment. The warning information is then adjusted based on traffic flow information, including reducing the content of the warning information and increasing the playback speed, to ensure that the acoustic devices can fully play the adjusted warning information while vehicles are passing through the second target road segment. This application can guarantee the effectiveness of warnings to passing vehicles without generating noise pollution.

[0052] The acoustic equipment deployment method for highway acoustic control systems proposed in this application is based on historical road condition information and historical environmental sound information. Under the premise of ensuring that drivers and passengers of passing vehicles can hear the warning information completely and clearly, the upper limit of the volume output of the acoustic equipment is determined and used as a reference for the selection of acoustic equipment. Attached Figure Description

[0053] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0054] The methods, systems, and / or procedures shown in the accompanying drawings will be further described with reference to exemplary embodiments. These exemplary embodiments will be described in detail with reference to the drawings. These exemplary embodiments are non-limiting exemplary embodiments, wherein reference numerals in the various views of the drawings represent similar mechanisms.

[0055] Figure 1 This is a block diagram of the architecture of a highway acoustic control system according to some embodiments of this application;

[0056] Figure 2 This is a schematic diagram of the architecture of the edge controller involved in some embodiments of this application;

[0057] Figure 3 Here are flowcharts of some embodiments of the acoustic control method for highways involved in this application;

[0058] Figure 4 This is a schematic diagram of a highway acoustic control scenario involving some embodiments of this application;

[0059] Figure 5 Here are flowcharts of other embodiments of the acoustic control method for highways involved in this application;

[0060] Figure 6 This is a flowchart of a highway acoustic control method according to some embodiments of this application;

[0061] Figure 7 This is a schematic diagram of an acoustic control scenario for a highway in a residential area, as described in some embodiments of this application.

[0062] Figure 8 Here are flowcharts illustrating some embodiments of the acoustic control method for highways in residential areas.

[0063] Figure 9 Here is a flowchart of a highway acoustic control method according to some embodiments of this application;

[0064] Figure 10 This is a flowchart illustrating an acoustic equipment deployment method for a highway acoustic control system, as described in some embodiments of this application.

[0065] Figure 11 This is a flowchart illustrating a method for deploying acoustic equipment for a highway acoustic control system in residential areas, based on some embodiments of this application.

[0066] Icons: 100 - System, 200 - Server, 300 - Edge Controller, 310 - Acoustic Equipment Control Device, 320 - Memory, 330 - Processor, 340 - Communication Unit, 410 - Acoustic Equipment, 420 - Information Acquisition Equipment, 500 - First Target Road Section, 501 - Deployment Location, 510 - Vehicle, 600 - Residential Area, 700 - Second Target Road Section Detailed Implementation

[0067] To better understand the above technical solutions, the technical solutions of this application will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of this application and the specific features in the embodiments are detailed descriptions of the technical solutions of this application, rather than limitations on the technical solutions of this application. In the absence of conflict, the embodiments of this application and the technical features in the embodiments can be combined with each other.

[0068] In the detailed description below, numerous specific details are illustrated with examples to provide a comprehensive understanding of the relevant guidance. However, it will be apparent to those skilled in the art that this application can be practiced without these details. In other instances, well-known methods, procedures, systems, components, and / or circuits have been described at a relatively high level without detail to avoid unnecessarily obscuring aspects of this application.

[0069] These and other characteristics, the functions disclosed in the current application, the methods of execution, the functions of related elements in the structure, the combination of components, and the economic efficiency of production, may become more apparent in consideration of the following description with reference to the accompanying drawings, all of which form part of this application. However, it should be clearly understood that the drawings are for illustrative and descriptive purposes only and are not intended to limit the scope of this application. It should be understood that these drawings are not drawn to scale.

[0070] This application uses flowcharts to illustrate the execution process performed by a system according to embodiments of this application. It should be clearly understood that the execution processes in the flowcharts may not be executed sequentially. Instead, these execution processes may be executed in reverse order or simultaneously. Additionally, at least one other execution process may be added to the flowchart. One or more execution processes may be deleted from the flowchart.

[0071] Example

[0072] Please refer to Figure 1This is a block diagram illustrating the architecture of a highway acoustic control system 100 according to some embodiments of this application. The system 100 includes a server 200, multiple edge controllers 300, and multiple acoustic devices 410 and multiple information acquisition devices 420 communicatively connected to the corresponding edge controllers 300. The edge controllers 300 can receive and process environmental information collected by the information acquisition devices 420, including at least the environmental sound information of the highway. The edge controllers 300 can communicate and transmit information to the acoustic devices 410 and control the acoustic devices 410 to send information. The server 200 can uniformly schedule and manage all acoustic devices 410 within the road network through the multiple edge controllers 300.

[0073] The highway acoustic control system 100 of this application adopts a "cloud-edge-device" architecture. Various types of acoustic devices 410 and information acquisition devices 420 are deployed along the front-end highway, an edge controller 300 is deployed at the edge, and a server 200 is deployed at the highway command center. The highway acoustic control system 100 can achieve unified management of the road network acoustic devices 410, connecting to upper-level IoT platforms, highway integrated management and control platforms, and intelligent operation and maintenance platforms. It also enables intelligent acoustic voice warnings, visualization of acoustic product status, and real-time collection of environmental information using the information acquisition devices 420. The edge controller analyzes the collected environmental information and, through intelligent acoustic control algorithms, dynamically adjusts the playback volume of the acoustic devices 410 in real time, providing drivers and passengers with the best auditory experience while extending the lifespan of the acoustic devices 410. It intelligently matches different warning information playback strategies, enabling intelligent broadcast warning control for key road sections. This not only provides early warnings to effectively prevent traffic accidents but also accurately releases different broadcast plans at the first moment of an accident, minimizing economic losses caused by the accident.

[0074] In some implementation methods, please refer to Figure 2 This is a schematic diagram of the architecture of an edge controller 300, which includes an acoustic device control unit 310, a memory 320, a processor 330, and a communication unit 340. The memory 320, processor 330, and communication unit 340 are electrically connected directly or indirectly to each other to achieve data transmission or interaction. For example, these components can be electrically connected to each other through one or more communication buses or signal lines. The acoustic device control unit 310 includes at least one software function module that can be stored in the memory 320 or embedded in the operating system (OS) of the edge controller 300 in the form of software or firmware. The processor 330 is used to execute executable modules stored in the memory 320, such as the software function modules and computer programs included in the acoustic device control unit 310.

[0075] The memory 320 can be, but is not limited to, Random Access Memory (RAM), Read Only Memory (ROM), Programmable Read-Only Memory (PROM), Erasable Programmable Read-Only Memory (EPROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), etc. The memory 320 stores programs, and the processor 330 executes these programs after receiving execution instructions to implement the methods and steps disclosed in this embodiment of the invention. The communication unit 340 is used to establish a communication connection between the edge controller 300 and the information acquisition device 420 and the acoustic device 410 via a network, and to send and receive data via the network.

[0076] Processor 330 may be an integrated circuit chip with signal processing capabilities. The aforementioned processor 330 can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this invention. The general-purpose processor can be a microprocessor or any conventional processor.

[0077] Understandable. Figure 2 The structure shown is for illustrative purposes only; the edge controller 300 may also include components that are more advanced than those shown. Figure 2 The more or fewer components shown, or having the same Figure 2 The different configurations shown. Figure 2 The components shown can be implemented using hardware, software, or a combination thereof.

[0078] Figure 3 This is a flowchart illustrating a highway acoustic control method according to some embodiments of this application. The method is applied to an edge controller 300, which is communicatively connected to multiple acoustic devices 410 arranged along the highway. Specifically, the method may include the following steps S100-S500.

[0079] Step S100: Determine road condition information based on the environmental information of the highway. The environmental information includes environmental sound information, and the road condition information includes abnormal event information and traffic flow information.

[0080] In this embodiment, the edge controller 300 is communicatively connected to multiple information acquisition devices 420, which are deployed along the highway to collect environmental information. Therefore, the environmental information of the highway includes environmental information from multiple locations along the highway. The information acquisition devices 420 include at least sound acquisition devices such as high-precision noise collectors and microphones to collect environmental sound information. The environmental sound information includes the sound of vehicles 510 driving, i.e., the sound generated by vehicles 510 driving normally on the highway. The environmental sound information may also include sound information of abnormal events occurring on or near the highway. Abnormal events include weather events such as rain and wind, and accidents that may or have already caused road safety incidents such as debris spilled by vehicles 510, vehicle collisions, landslides, and construction.

[0081] The edge controller 300 processes environmental sound information to obtain highway traffic information. This processing can employ either a template matching model or a neural network model. The template matching model pre-stores raw sound information for various categories as reference templates. When the similarity between the sound information to be identified and the template information meets a threshold set for any category, the sound information to be identified is determined to be of the same category as the corresponding reference information. The neural network model requires training and adjusting the model's parameters using a large amount of sample sound information with category labels to achieve the target performance. Finally, the environmental sound information is input into the trained neural network model to obtain traffic information. It is understood that the edge controller 300 can also employ other sound recognition models to obtain traffic information. Specifically, the edge controller 300 can identify the type and location of abnormal events from the sound information of abnormal events, and can also identify traffic flow information such as the vehicle type, number, and speed of vehicles 510 from the sound of vehicles 510 driving.

[0082] As an optional implementation, the information acquisition device 420 may also include a camera, radar, weather instrument, etc. Correspondingly, the environmental information may also include environmental image information, radar information, weather information, etc. The edge controller 300 can process the environmental sound information, environmental image information, radar information, and weather information separately, and combine at least two of the information processing results, including the environmental sound information processing result, to obtain more accurate road condition information.

[0083] Step S200: Based on the road condition information, determine multiple warning messages, each of which corresponds to one of the acoustic devices 410. The multiple warning messages are used to warn vehicles 510 on the highway.

[0084] In this embodiment, after determining the road condition information, the edge controller 300 judges whether the corresponding section of the highway needs a warning based on the road condition information, and generates corresponding warning information when a warning is needed. For example, when the traffic volume is large and there are many large vehicles such as buses and trucks, a warning message is generated to remind drivers and passengers to drive cautiously; a warning message is generated at night to remind drivers and passengers to avoid fatigue driving; a warning message is generated when road construction is underway to remind drivers and passengers to pay attention to safety ahead of construction; a warning message is generated when the driving vehicle 510 is identified as a motorcycle to control its driver and passengers to exit the highway at the nearest toll station; two warning messages are generated when the vehicle 510 is identified as driving in the wrong direction, one warning message is used to control its driver and passengers to pull over as soon as possible, and the other warning message is used to remind vehicles behind to pay attention to the danger ahead and drive cautiously; when a collision accident is identified, a warning message is generated to remind the vehicle 510 behind the collision accident to slow down and avoid it in time.

[0085] It is understood that the road condition information includes road condition information for multiple sections along the highway, and multiple warning messages are also used to warn vehicles 510 on different sections of the highway, meaning there is a correspondence between the warning messages and the road sections to be warned. Furthermore, the acoustic device 410 in this embodiment includes various types of loudspeakers used to play information to upstream road sections; different acoustic devices 410 correspond to different road sections, meaning there is a correspondence between the acoustic devices 410 and the road sections. Therefore, after determining the warning message corresponding to the road section to be warned based on the road condition information, the corresponding acoustic device 410 can be matched to the road section to be warned, thus establishing a correspondence between the warning messages and the acoustic devices 410.

[0086] Step S300: Based on the content of each warning message and the traffic flow information, determine the first target road segment 500 that the corresponding acoustic device 410 needs to cover, so that the acoustic device 410 can play the warning message completely while the vehicle 510 passes through any of the first target road segments 500.

[0087] In this embodiment, the acoustic device 410 plays information upstream and forms a certain coverage area. Specifically, the information played by the acoustic device 410 has an effective propagation distance. Drivers and passengers in vehicles 510 within the effective propagation distance of the acoustic device 410 can clearly hear the played information, indicating that they are within the coverage area; drivers and passengers in vehicles 510 outside the effective propagation distance cannot hear or clearly hear the played information, indicating that they are outside the coverage area. As an optional method, speech intelligibility can be used as an indicator to measure whether drivers and passengers can hear clearly. Preferably, a speech intelligibility of 90% is used as the threshold value. When speech intelligibility is greater than or equal to 90%, it is considered that the information can be heard clearly; when speech intelligibility is less than 90%, it is considered that the information cannot be heard clearly. Specifically, the speech intelligibility of the information played by the acoustic device 410 can be measured at different distances. The distance at which speech intelligibility is equal to 90% is the effective propagation distance of the acoustic device 410. It is understood that other existing technologies can also be used in this embodiment to measure whether drivers and passengers can hear the information being played, and thereby define the coverage area of ​​the acoustic device 410.

[0088] like Figure 4 As shown, the first target road segment 500 is the road segment extending upstream from the acoustic device 410 with an effective propagation distance, that is, the first target road segment 500 represents the coverage area of ​​the acoustic device 410 on the highway in that direction.

[0089] In this embodiment, the complete ability of the acoustic device 410 to play the warning information specifically means that the acoustic device 410 can play the warning information from beginning to end at least once. It can be understood that if the vehicle 510 enters the coverage area of ​​the acoustic device 410 midway through playing a warning information and leaves before the acoustic device 410 finishes playing the next warning information, the driver and passengers of the vehicle 510 will hear two incomplete warning information segments, indicating that the acoustic device 410 failed to play the warning information completely.

[0090] In this embodiment, the warning information is played as a sound signal through the acoustic device 410. Playing the warning information completely requires a certain amount of time, and the vehicle 510 also needs time to enter and leave the first target road segment 500 with the traffic flow. The transit time of the vehicle 510 must be more than twice the complete playback time to ensure that the acoustic device 410 can play the warning information at least once from beginning to end. It can be understood that once the content of the warning information is determined, the time required to play the warning information completely is also determined. Therefore, the length of the first target road segment 500 needs to be designed to ensure that the transit time of the vehicle 510 under the current traffic flow meets the requirements.

[0091] Step S400: Based on the ambient sound information and each first target road segment 500, determine the playback volume of the corresponding acoustic device 410 so that the vehicle 510 in each first target road segment 500 can receive the corresponding warning information.

[0092] It is understandable that ambient sound information affects the effective propagation distance of the acoustic device 410, thus affecting its coverage area. With a fixed volume, the noisier the ambient sound, the shorter the effective propagation distance of the information played by the acoustic device 410, meaning a smaller coverage area. Therefore, in this embodiment, to ensure that the vehicle 510 receives the corresponding warning information, i.e., to ensure that the acoustic device 410 covers the entire first target road segment 500, the playback volume of the acoustic device 410 needs to be adjusted according to the level of ambient noise. Specifically, a volume adjustment curve for the acoustic device 410 can be pre-established to obtain corresponding volume adjustment values ​​under different levels of ambient noise and different lengths of the first target road segment 500.

[0093] Furthermore, as an optional implementation, the volume adjustment curve can also take into account the impact of the warning information: changes in the text content and voice frequency (such as male voice, female voice) of the warning information will affect the coverage of the acoustic device 410, thus requiring different playback volumes to correct the differences in coverage. Therefore, in this implementation, step S400 includes determining the playback volume of the corresponding acoustic device 410 based on the ambient sound information, each first target road segment 500 and the corresponding warning information.

[0094] Step S500: Control each of the acoustic devices 410 to repeatedly play the corresponding warning information at the corresponding playback volume.

[0095] In this embodiment, the warning information is repeatedly played to continuously warn vehicles 510 that are constantly entering the first target road segment 500 until the warning information changes or no longer needs to be warned. As an optional implementation, this embodiment repeats the aforementioned steps S100-S500 at certain time intervals to control the acoustic device 410 to adjust the warning information and playback volume in real time according to changes in environmental information.

[0096] Through steps S100-S500, this embodiment can ensure that drivers and passengers in vehicles 510 within the first target road segment 500 can hear the broadcast content clearly, and also ensure that drivers and passengers have sufficient time to obtain complete warning information.

[0097] In some embodiments, such as Figure 5 As shown, step S300 includes:

[0098] Step S310: Determine the playback duration of each warning message based on its content.

[0099] Step S320: Determine the vehicle speed on the highway based on the traffic flow information.

[0100] Step S330: Determine the length of each of the first target road segments 500, where the length is equal to a preset multiple of the product of the corresponding playback duration and the traffic flow speed.

[0101] In this embodiment, each first target road segment 500 is a road segment within the length corresponding to the acoustic device 410 in the playback direction. By limiting the length of the first target road segment 500 to a preset multiple equal to the product of the playback duration and the traffic speed, the acoustic device 410 can play the warning information completely once or twice while the vehicle 510 passes through the first target road segment 500, thereby ensuring that drivers and passengers within the first target road segment 500 can fully receive the warning information. Preferably, the preset multiple is any natural number from 2 to 4; if the multiple is too high, the length of the first target road segment 500 will be too long, which will require an excessively high playback volume to cover the first target road segment 500, causing the acoustic device 410 to operate at a high volume for a long time and be damaged. In addition, excessively loud volume received by the front end of the first target road segment 500 near the acoustic device 410 will cause hearing discomfort to drivers and passengers.

[0102] In some embodiments, such as Figure 6 As shown, step S400 of the highway acoustic control method includes:

[0103] Step S410: Determine the ambient sound volume corresponding to each acoustic device 410 based on the ambient sound information.

[0104] Step S420: According to a preset rule, determine a first volume corresponding to each ambient sound volume. The first volume is higher than the ambient sound volume by a corresponding preset volume value, so that the vehicle 510 can receive the corresponding warning information with the first volume.

[0105] Step S430: Determine the corresponding playback volume based on each first volume and the length of the corresponding first target road segment 500, so that when the corresponding acoustic device 410 plays at the playback volume, the volume at the end of the first target road segment 500 away from the corresponding acoustic device 410 is equal to the first volume.

[0106] The ambient sound information includes ambient sound information at different locations along the highway. It is understood that the noise level of the ambient sound information at different locations may vary. In this embodiment, the corresponding ambient sound volume is obtained from the ambient sound information around each acoustic device 410 to determine the noise level around different acoustic devices 410.

[0107] In this embodiment, the first volume determined according to preset rules should be higher than the ambient sound volume by a preset volume value. This ensures that the vehicle 510 can receive the corresponding warning information at the first volume, meaning the speech intelligibility of the warning information at the first volume meets the preset rules at the ambient sound volume, thus allowing the driver and passengers of the vehicle 510 to hear it clearly. Preferably, the vehicle 510 can just receive the corresponding warning information at the first volume, meaning the speech intelligibility of the warning information at the first volume reaches a preset value, such as 90%, at the ambient sound volume. The preset volume value may vary depending on the ambient sound volume. The preset volume value can be obtained through experimentation or other existing methods. As an optional implementation, the preset volume value ranges from 2 to 30 decibels.

[0108] It is understood that the further away from the acoustic device 410 within the first target road segment 500, the lower the volume of the warning information received. To ensure that all drivers and passengers in vehicles 510 within the first target road segment 500 can clearly hear the warning information, this embodiment controls the playback volume so that the warning information still has a certain volume when it reaches the end of the first target road segment 500 (i.e., the end of the first target road segment 500 furthest from the corresponding acoustic device 410). Specifically, in this embodiment, the volume can be expressed as the sound pressure level of the direct sound, and the volume at the end of the first target road segment 500 can be calculated according to the acoustic transmission formula:

[0109] L p =L1-20lgr,

[0110] Among them, L p L1 is the sound pressure at the end of the first target road segment 500, i.e., the first volume; L1 is the sound pressure at a distance of 4101 meters from the acoustic device; r is the distance from the end of the first target road segment 500 to the acoustic device 410.

[0111] In this embodiment, the playback volume of the acoustic device 410 is controlled according to preset rules so that the drivers and passengers of the vehicles 510 in the first target road section 500 can receive the warning information, and further avoid damage to the acoustic device 410 by continuously outputting at the maximum volume and causing hearing discomfort to the drivers and passengers.

[0112] In some embodiments, such as Figure 7 As shown, there are 600 residential areas along the highway. Figure 8 As shown, the acoustic control methods for highways include:

[0113] Step S600: Based on the location of the residential area 600 and the plurality of acoustic devices 410, determine the volume threshold corresponding to each of the acoustic devices 410, so that the volume of the warning information received by the residential area 600 is less than a preset volume;

[0114] When the playback volume is less than or equal to the corresponding volume threshold, step S500 is executed.

[0115] When the playback volume is greater than the corresponding volume threshold, steps S700-S900 are executed.

[0116] Step S700: Determine the ambient sound volume corresponding to each acoustic device 410 based on the ambient sound information; determine the corresponding second target road segment 700 based on the volume threshold and the ambient sound volume; when the acoustic device 410 plays at the volume threshold, the volume of the warning information received by the vehicle 510 in the second target road segment 700 is at least higher than the ambient sound volume by a preset volume value.

[0117] Step S800: Based on the second target road segment 700 and the traffic flow information, adjust the corresponding warning information so that the acoustic device 410 can fully play the adjusted warning information while the vehicle 510 passes through any of the second target road segments 700.

[0118] Step S900: Control the corresponding acoustic device 410 to repeatedly play the adjusted warning information at the volume threshold.

[0119] To avoid noise pollution to residential area 600, this embodiment requires ensuring that the sound level received by residential area 600 is lower than a preset volume. The preset volume can be obtained from relevant standards; for example, the preset volume can be 55 decibels during the day and 45 decibels at night.

[0120] First, the change in volume with distance at different angles when the acoustic device 410 is playing can be obtained through testing or manufacturer data. Then, based on the positional relationship between the acoustic device 410 and the residential area 600 and the preset volume, the volume threshold at which the acoustic device 410 will not cause noise pollution can be calculated. When the playback volume is less than or equal to the volume threshold, it indicates that the acoustic device 410 will not cause noise pollution to the residential area 600, and step S500 can be executed directly. When the playback volume is greater than the volume threshold, it indicates that the acoustic device 410 will cause noise pollution to the residential area 600 when playing at the playback volume, so it is necessary to control the acoustic device 410 to play at the volume threshold.

[0121] In this embodiment, the second target road segment 700 represents the coverage area on the highway when the acoustic device 410 plays at a volume threshold under the corresponding ambient sound volume. The method for obtaining the preset volume value can refer to the embodiment of steps S410-S430.

[0122] Furthermore, as an optional implementation, step S800 may include:

[0123] Step S810: Determine the vehicle speed on the highway based on the traffic flow information.

[0124] Step S820: Determine the first time duration for vehicle 510 to pass through the second target road segment 700 based on the length of the second target road segment 700 and the traffic flow speed.

[0125] Step S830: Adjust the corresponding warning information according to the first duration so that the acoustic device 410 can play the adjusted warning information completely at least once.

[0126] Specifically, the complete playback time of the acoustic device 410 can be half or even less of the first duration, ensuring that the acoustic device 410 plays the warning information at least once. Adjusting the corresponding warning information involves at least one of reducing the content of the warning information or increasing the playback speed. Preferably, the complete playback time of the acoustic device 410 is half of the first duration, ensuring that the acoustic device 410 can play the warning information completely once or twice. Simultaneously, the warning information is not reduced too much or played too quickly, thus preventing drivers and passengers from obtaining effective warning information. As an optional implementation, a display device is also provided near the acoustic device 410. The display device includes information boards, guidance lights, signal lights, and electric lights, which display the warning information according to preset rules in conjunction with the acoustic device 410, avoiding a decrease in warning effectiveness due to adjustments in the warning information.

[0127] In this embodiment, when controlling the acoustic device 410 near the residential area 600, the volume threshold of the acoustic device 410 is first limited to prevent noise pollution to the residential area 600. Based on the volume threshold, the effective coverage area of ​​the warning information is determined, i.e., the second target road segment 700 is identified. Then, the warning information is adjusted according to traffic flow information. Adjustment methods include reducing the content of the warning information and increasing the playback speed, so that the acoustic device 410 can fully play the adjusted warning information while the vehicle 510 passes through the second target road segment 700. This application can ensure the warning effect on passing vehicles 510 without generating noise pollution.

[0128] In some embodiments, such as Figure 9 As shown, the acoustic control methods for highways also include:

[0129] Step S10: Receive the environmental information uploaded by the plurality of information collection devices 420.

[0130] Step S1000: Based on the warning information collected by the information collection device 420, determine the fault status of the corresponding acoustic device 410.

[0131] Multiple information acquisition devices 420 can be spaced out along the highway to collect environmental sound information from multiple locations along the highway. This allows the edge controller 300 to determine road condition information over a larger area of ​​the highway and generate more accurate initial information. The information acquisition devices 420 may have a one-to-one or one-to-many correspondence with the acoustic devices 410, or there may be no correspondence between them. When a correspondence exists, the information acquisition device 420 and the corresponding acoustic device 410 should be less than a certain distance apart so that the information acquisition device 420 can collect environmental information within the first target road segment 500 and / or the second target road segment 700 corresponding to the acoustic device 410. This allows the edge controller 300 to generate and control the playback of warning information in real time.

[0132] In this embodiment, the information acquisition device 420 is also used to acquire the warning information played by the acoustic device 410. The edge controller 300 can determine the fault state of the acoustic device 410 based on the audio parameters such as volume, timbre, and spectrum of the acquired warning information. As an optional implementation, the volume range when the warning information is transmitted to the information acquisition device 420 can be determined based on the direction, distance, and playback volume between the information acquisition device 420 and the corresponding acoustic device 410 to be detected. When the volume of the warning information acquired by the information acquisition device 420 is less than the volume range, the acoustic device 410 is determined to be faulty. As another optional implementation, when abnormal sounds such as electrical noises are identified from the acquired warning information, the acoustic device 410 can be considered to be faulty. It is understood that steps 10 and 1000 can also be applied to any of the foregoing embodiments.

[0133] This embodiment not only uses the information acquisition device 420 to collect environmental sound information so that the edge controller 300 can generate early warning information for early warning control, but also uses the information acquisition device 420 to judge the playback effect of the acoustic device 410, thereby determining whether the acoustic device 410 has malfunctioned, thus solving the problem of inconvenient maintenance and repair of the acoustic device 410 due to the long mileage of highways.

[0134] like Figure 10As shown, some embodiments of this application relate to a method for deploying acoustic devices 410 in a highway acoustic control system. This method is applied to an edge controller 300 to determine the deployment location 501 of the acoustic devices 410 to be deployed and the upper limit of their volume output. The method includes steps S1100-S1500.

[0135] Step S1100: Based on the historical road condition information of the expressway, determine multiple warning messages. The historical road condition information includes historical abnormal event information and historical traffic flow information. Each warning message is played by the corresponding acoustic device 410 to warn vehicles 510 on the corresponding section of the expressway.

[0136] In this embodiment, abnormal events include weather events such as rain and wind, and accidents that may or have already caused road safety issues, such as debris spilled by vehicle 510, vehicle collisions, landslides, and construction. Traffic flow information includes vehicle type, number, and speed information. Historical road condition information can be collected by the information collection device 420 within a historical time period. Of course, historical road condition information can also be obtained by any existing method, and this embodiment does not limit the acquisition method. The edge controller 300 can retrieve historical road condition information from the memory 220 or obtain it from other devices through the communication unit 240.

[0137] Step S1200: Based on each warning message and the corresponding road segment, determine multiple deployment locations 501, each deployment location 501 being used to deploy the corresponding acoustic device 410.

[0138] In this embodiment, after the edge controller 300 determines the road section requiring warning and the warning information from the historical traffic information, it sets the deployment position 501 of the acoustic device 410 according to the preset rules.

[0139] Specifically, as an optional implementation, multiple deployment locations 501 can be determined in the road segment corresponding to each warning information by arranging them at a first interval, and multiple deployment locations 501 can be determined in the road segment where no warning information appears by arranging them at a second interval. The first interval is smaller than the second interval, so as to achieve a better warning effect in the road segment corresponding to each warning information.

[0140] As another optional implementation, different road segments can be divided according to the frequency of the warning information. The road segment that reaches the preset frequency is the first road segment. The first road segment requires warnings multiple times in the historical period. Therefore, multiple deployment positions 501 are determined in the first road segment in a first interval arrangement. The road segment that does not reach the preset frequency is the second road segment. The second road segment requires warnings only a few times or does not require warnings in the historical period. Therefore, multiple deployment positions 501 are determined in the second road segment in a second interval arrangement. The first interval is smaller than the second interval to achieve a better warning effect in the first road segment, while avoiding excessive waste caused by too many acoustic devices 410 in the second road segment.

[0141] Step S1300: Based on the warning information and historical traffic flow information corresponding to each deployment location 501, determine the first target road segment 500 that the corresponding acoustic device 410 needs to cover, so that the acoustic device 410 can play the warning information completely while the vehicle 510 passes through any of the first target road segments 500.

[0142] In this embodiment, the acoustic device 410 plays information upstream and forms a certain coverage area. Specifically, the information played by the acoustic device 410 has an effective propagation distance. Drivers and passengers in vehicles 510 within the effective propagation distance of the acoustic device 410 can clearly hear the played information, indicating that they are within the coverage area; drivers and passengers in vehicles 510 outside the effective propagation distance cannot hear or clearly hear the played information, indicating that they are outside the coverage area. As an optional method, speech intelligibility can be used as an indicator to measure whether drivers and passengers can hear clearly. Preferably, a speech intelligibility of 90% is used as the threshold value. When speech intelligibility is greater than or equal to 90%, it is considered that the information can be heard clearly; when speech intelligibility is less than 90%, it is considered that the information cannot be heard clearly. Specifically, the speech intelligibility of the information played by the acoustic device 410 can be measured at different distances. The distance at which speech intelligibility is equal to 90% is the effective propagation distance of the acoustic device 410. It is understood that other existing technologies can also be used in this embodiment to measure whether drivers and passengers can hear the information being played, and thereby define the coverage area of ​​the acoustic device 410.

[0143] The first target road segment 500 is the road segment extending upstream from the acoustic device 410 with an effective propagation distance, that is, the first target road segment 500 represents the coverage area of ​​the acoustic device 410 on the highway in that direction.

[0144] In this embodiment, the complete ability of the acoustic device 410 to play the warning information specifically means that the acoustic device 410 can play the warning information from beginning to end at least once. It can be understood that if the vehicle 510 enters the coverage area of ​​the acoustic device 410 midway through playing a warning information and leaves before the acoustic device 410 finishes playing the next warning information, the driver and passengers of the vehicle 510 will hear two incomplete warning information segments, indicating that the acoustic device 410 failed to play the warning information completely.

[0145] In this embodiment, the warning information is played as a sound signal through the acoustic device 410. Playing the warning information completely requires a certain amount of time, and the vehicle 510 also needs time to enter and leave the first target road segment 500 with the traffic flow. The transit time of the vehicle 510 must be more than twice the complete playback time to ensure that the acoustic device 410 can play the warning information at least once from beginning to end. It can be understood that once the content of the warning information is determined, the time required to play the warning information completely is also determined. Therefore, the length of the first target road segment 500 needs to be designed to ensure that the transit time of the vehicle 510 under historical traffic flow meets the requirements.

[0146] Preferably, the length of each first target road segment 500 is equal to a preset multiple of the product of the corresponding playback duration and the historical traffic speed, where the preset multiple is any natural number from 2 to 4.

[0147] Step S1400: Based on each first target road segment 500 and the corresponding historical ambient sound information, determine the target volume corresponding to each acoustic device 410, so that when the acoustic device 410 plays the corresponding warning information at the corresponding target volume, the vehicle 510 in each first target road segment 500 can receive the corresponding warning information.

[0148] In this embodiment, historical environmental sound information can be collected by the information acquisition device 420 within a historical time period. Of course, historical environmental sound information can also be obtained by any existing method, and this embodiment does not limit the acquisition method. The edge controller 300 can retrieve historical environmental sound information from the memory 220, or it can obtain it from other devices through the communication unit 240.

[0149] It is understandable that ambient sound information affects the effective propagation distance of the acoustic device 410, thus affecting its coverage area. With a fixed volume, the noisier the ambient sound, the smaller the effective propagation distance of the information played by the acoustic device 410, meaning a smaller coverage area. Therefore, in this embodiment, to ensure that the vehicle 510 receives the corresponding warning information, i.e., to ensure that the acoustic device 410 covers the entire first target road segment 500, the target volume of the acoustic device 410 needs to be adjusted according to the level of ambient noise. The level of ambient noise can be represented by the ambient sound volume. Specifically, in this embodiment, the historical ambient sound noise level is the maximum historical ambient sound volume for the corresponding road segment. A volume adjustment curve for the acoustic device 410 can be pre-established to obtain corresponding volume adjustment values ​​under different ambient sound noise levels and different lengths of the first target road segment 500.

[0150] Furthermore, as an optional implementation, the volume adjustment curve can also take into account the impact of warning information: changes in the text content and voice frequency (such as male voice, female voice) of the warning information will affect the coverage of the acoustic device 410, thus requiring different target volumes to correct the differences in coverage. Therefore, in this implementation, step S1400 includes determining the target volume of the corresponding acoustic device 410 based on historical environmental sound information, each first target road segment 500 and the corresponding warning information.

[0151] Step S1500: Determine the upper limit of the volume output of the acoustic device 410 corresponding to the target volume according to preset rules.

[0152] In this embodiment, in order to ensure that the acoustic device 410 can play the warning information at the target volume, the upper limit of the volume output of the acoustic device 410 should be at least greater than or equal to the target volume. Preferably, the upper limit of the volume output of the acoustic device 410 is at least 10%-20% greater than the target volume to leave volume redundancy and prevent unexpected situations.

[0153] Through steps S1100-S1500, this embodiment can determine the installation location 501 of the acoustic device 410, facilitating highway management personnel to reasonably install the acoustic device 410 in road sections where it is not yet installed, and to reasonably improve the location of the acoustic device 410 in road sections where it is already installed. Furthermore, this embodiment determines the upper limit of the volume output of the acoustic device 410 at each installation location 501, facilitating highway management personnel to select the appropriate model of the acoustic device 410, and avoiding situations where the volume of the acoustic device 410 is too low during later use, causing drivers and passengers to be unable to hear the broadcast content, or the broadcast volume is too high, causing auditory discomfort.

[0154] In some embodiments, there are residential areas 600 along the highway. For example... Figure 11 As shown, the method for deploying acoustic equipment 410 for highway acoustic control systems also includes:

[0155] Step S1600: Determine the coverage angle of the acoustic device 410 based on the location of the plurality of deployment locations 501 and the residential area 600.

[0156] Step S1610: When the deployment location 501 is less than the residential area 600 by a preset distance, the coverage angle of the acoustic device 410 is determined to be a first angle, which is 15 degrees.

[0157] Step S1620: When the deployment location 501 is greater than or equal to the residential area 600, the coverage angle of the acoustic device 410 is determined to be a second angle, which is greater than the first angle.

[0158] In this embodiment, the preset distance can be 50 meters, 100 meters, 200 meters, 300 meters, etc. The coverage angle of the acoustic device 410 is a parameter of the acoustic device 410 itself, which can represent the directivity of the acoustic device 410. Specifically, the coverage angle is the angle measured relative to the reference axis in a plane including the reference axis. The sound pressure level measured at this angle and at a specified distance is 10 dB or 6 dB lower than the sound pressure level measured on the reference axis. In this embodiment, a highly directive acoustic device 410 is selected at the deployment location 501 near the residential area 600 to reduce noise pollution to the residential area 600. Specifically, a directional loudspeaker can be selected. The directional loudspeaker uses parametric array acoustic technology to concentrate sound waves into a sound column with an extremely narrow beamwidth for directional speech playback. A high-gain penetrating loudspeaker is selected at the deployment location 501 far from the residential area 600. The high-gain penetrating loudspeaker, through high electroacoustic conversion design, sound waveguide design, and with a specific transducer diaphragm and magnetic circuit, can emit speech with a higher intensity than the directional loudspeaker.

[0159] Some embodiments of this application also relate to a highway acoustic control system. The system includes a server 200;

[0160] Multiple edge controllers 300 are communicatively connected to server 200;

[0161] Multiple acoustic devices 410 are deployed using the aforementioned method for deploying acoustic devices 410 in a highway acoustic control system and are communicatively connected to the edge controller 300.

[0162] Multiple information acquisition devices 420 are connected to the edge controller 300 to collect environmental sound information of the highway and send it to the edge controller 300.

[0163] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

[0164] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0165] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0166] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. A method for acoustic control of highways, characterized in that, An edge controller is applied to an edge controller that is communicatively connected to multiple acoustic devices arranged along the highway; the method includes: Road condition information is determined based on the environmental information of the expressway, wherein the environmental information includes environmental sound information and the road condition information includes abnormal event information and traffic flow information; Multiple warning messages are determined based on the road condition information, each warning message corresponds to one of the acoustic devices, and the multiple warning messages are used to warn vehicles on the highway. Based on the content of each warning message and the traffic flow information, a first target road segment that the corresponding acoustic device needs to cover is determined, so that the acoustic device can play the warning message completely while the vehicle passes through any of the first target road segments; wherein, based on the content of each warning message, the playback duration of each warning message is determined; based on the traffic flow information, the traffic flow speed on the highway is determined; and the length of each first target road segment is determined, the length being equal to a preset multiple of the product of the corresponding playback duration and the traffic flow speed; Based on the ambient sound information and each first target road segment, the playback volume of the corresponding acoustic device is determined so that the vehicles within each first target road segment can receive the corresponding warning information; wherein, the ambient sound volume corresponding to each acoustic device is determined based on the ambient sound information; a first volume corresponding to each ambient sound volume is determined according to a preset rule, wherein the first volume is higher than the ambient sound volume by a preset volume value so that the vehicles can receive the corresponding warning information with the first volume; and the playback volume is determined based on each first volume and the length of the corresponding first target road segment so that when the corresponding acoustic device plays at the playback volume, the volume at the end of the first target road segment away from the corresponding acoustic device is equal to the first volume; Control each of the acoustic devices to repeatedly play the corresponding warning information at the corresponding playback volume.

2. The highway acoustic control method as described in claim 1, characterized in that, The highway runs through residential areas; The method includes: Based on the location of the residential area and the plurality of acoustic devices, a volume threshold corresponding to each of the acoustic devices is determined so that the volume of the warning information received by the residential area is less than a preset volume; When the playback volume is greater than the corresponding volume threshold, the ambient sound volume corresponding to each acoustic device is determined according to the ambient sound information, and the corresponding second target road segment is determined according to the volume threshold and the ambient sound volume; when the acoustic device plays at the volume threshold, the volume of the warning information received by the vehicle in the second target road segment is at least higher than the ambient sound volume by a preset volume value. Based on the second target road segment and the traffic flow information, the corresponding warning information is adjusted so that the acoustic device can fully play the adjusted warning information while the vehicle is passing through any of the second target road segments; The corresponding acoustic device is controlled to repeatedly play the adjusted warning information at the volume threshold.

3. The highway acoustic control method as described in claim 2, characterized in that, The early warning information corresponding to the adjustment includes: At least one of the following: reducing the content of the warning message or speeding up the playback speed of the warning message.

4. The highway acoustic control method according to any one of claims 1-3, characterized in that, The edge controller is also communicatively connected to multiple information acquisition devices, which are arranged along the highway. The method includes: Receive the environmental information uploaded by the multiple information collection devices; Based on the warning information collected by the information acquisition device, the fault status of the corresponding acoustic device is determined.

5. An edge controller, characterized in that, It includes a processor and a memory that communicate with each other, the processor being configured to retrieve a computer program from the memory and implement the method as described in any one of claims 1-4 by running the computer program.

6. A method for arranging acoustic equipment for a highway acoustic control system, characterized in that, Applied to an edge controller, the method includes: Based on the historical road condition information of the expressway, multiple early warning messages are determined. The historical road condition information includes historical abnormal event information and historical traffic flow information. Each early warning message is played by the corresponding acoustic device to warn vehicles on the corresponding section of the expressway. Based on each warning message and the corresponding road segment, multiple deployment locations are determined, and each deployment location is used to deploy the corresponding acoustic device; Based on the warning information and historical traffic flow information corresponding to each deployment location, a first target road segment that the corresponding acoustic device needs to cover is determined, so that the acoustic device can play the warning information completely while the vehicle passes through any of the first target road segments; wherein, the playback duration of each warning information is determined based on the content of each warning information; the historical traffic flow speed on the highway is determined based on the historical traffic flow information; and the length of each first target road segment is determined, the length being equal to a preset multiple of the product of the corresponding playback duration and the historical traffic flow speed. Based on each first target road segment and its corresponding historical ambient sound information, a target volume is determined for each acoustic device, so that when the acoustic device plays the corresponding warning information at the corresponding target volume, the vehicles within each first target road segment can receive the corresponding warning information; wherein, the historical ambient sound volume corresponding to each acoustic device is determined based on the historical ambient sound information; a first volume corresponding to each historical ambient sound volume is determined according to a preset rule, wherein the first volume is higher than the historical ambient sound volume by a preset volume value, so that the vehicles can receive the corresponding warning information with the first volume; and a corresponding target volume is determined based on each first volume and the length of the corresponding first target road segment, so that when the corresponding acoustic device plays at the target volume, the volume at the end of the first target road segment away from the corresponding acoustic device is equal to the first volume; According to preset rules, the upper limit of the volume output of the acoustic device corresponding to the target volume is determined.

7. The method for arranging acoustic equipment for a highway acoustic control system as described in claim 6, characterized in that, The highway runs through residential areas; The method includes: The coverage angle of the acoustic device is determined based on the multiple deployment locations and the location of the residential area: When the deployment location is less than a preset distance from the residential area, the coverage angle of the acoustic device is determined to be a first angle, and the first angle is 15 degrees. When the deployment location is greater than or equal to a preset distance from the residential area, the coverage angle of the acoustic device is determined to be a second angle, which is greater than the first angle.

8. A highway acoustic control system, characterized in that, The system includes: server; Multiple edge controllers as described in claim 5 are communicatively connected to the server; Multiple acoustic devices are deployed using the method described in claim 6 or 7 and are communicatively connected to the edge controller; Multiple information acquisition devices are communicatively connected to the edge controller to collect environmental sound information of the highway and send it to the edge controller.

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