Sound barrier regulation and control system and control method thereof

Abstract

The invention discloses a sound barrier regulation and control system and a control method thereof, and belongs to the technical field of traffic noise abatement, the system is divided into a plurality of independent control sections along the length direction of a sound barrier, and each section is integrated with an environment detection unit, an execution unit, an inclination angle adjustable sound insulation plate, a lifting type sound absorption module, an electromagnetic valve drainage group and a section controller. The central controller evaluates rainstorm, strong wind and noise threat levels in real time based on a dynamic threat value model, triggers a single-factor, double-factor composite or three-factor comprehensive protection mode, adjusts the wind load of the sound insulation board through an asymmetric dip angle strategy, activates and enhances high-frequency sound absorption through a micro-perforated array, and jointly verifies false triggering prevention drainage through three sections. The system suppresses instantaneous interference through moving average filtering, supports parameter adaptive updating and daily automatic calibration, and is suitable for scenes such as high-speed rails and expressways.

Description

Technical Field

[0001] The present invention relates to the technical field related to traffic noise control, and specifically to a sound barrier control system and a control method thereof. Background Art

[0002] Traditional sound barriers often utilize fixed structures and rely on passive sound-absorbing materials for noise control, resulting in poor environmental adaptability and delayed control responses. While some existing active noise reduction systems can adjust parameters through sensor feedback, these systems are often limited to optimizing a single noise frequency band and lack a coordinated response mechanism to complex environmental threats such as heavy rain and strong winds. Furthermore, existing drainage systems often rely on manual intervention and cannot dynamically adjust based on rainfall, which can easily lead to roadbed erosion. Therefore, there is an urgent need for an intelligent sound barrier system that can integrate environmental parameters and achieve multi-mode adaptive control. Summary of the Invention

[0003] The purpose of the present invention is to provide a sound barrier control system and a control method thereof, which can realize intelligent switching of single-factor, double-factor and three-factor composite modes according to the threat level of heavy rain, strong wind and noise, improve the response speed, and dynamically control the sound barrier.

[0004] To achieve the above-mentioned purpose, the present invention is implemented through the following technical solutions: a sound barrier control system, comprising several independent control sections divided along the length direction of the sound barrier, each section is configured with: an environmental detection unit, an execution unit, and a section control unit.

[0005] According to a further technical solution, the environmental detection unit includes a noise sensor, an anemometer and a rain gauge; The execution unit includes an inclination-adjustable sound insulation board, a lifting sound absorption module and a drainage valve group; The section control unit is in communication with the central controller; The rotating mechanism of the sound insulation board constitutes an angle feedback sensor. The surface of the sound insulation board is covered with a hydrophobic coating, and the surface of the sound absorption module is provided with a micro-perforation array.

[0006] A method for controlling a sound barrier control system, characterized by comprising the following steps: S10, real-time collection of noise sound pressure level L in each control section P , real-time wind speed v and real-time rainfall R; S20. Calculate the dynamic threat value of each environmental factor: Heavy rain threat value T r =α*(R / R max ) 2 ; Strong wind threat value T w =β*(v / v max )3 ; Noise threat value T n =η*(L p / L max ); Where: R max is the pre-calibrated maximum real-time rainfall value, v max is the pre-calibrated maximum real-time wind speed, L max is the pre-calibrated maximum noise pain threshold, α is the pre-calibrated correction coefficient for the rainstorm threat value, β is the pre-calibrated correction coefficient for the strong wind threat value, and η is the pre-calibrated correction coefficient for the noise threat value; S30, according to T r 、T w and T n The value is compared with the pre-calibrated threshold data and the corresponding working mode is selected.

[0007] Further technical solution, said S30, according to T r 、T w and T n The value of is compared with the pre-calibrated threshold data, and the corresponding working mode is selected. Specifically, when a threat value is higher than the other two threat values by more than T1, the single factor working mode is selected; if T r 、T w When the threat values are all greater than T2, the dual-factor composite mode is selected; if T r 、T w 、T n If all of them are greater than T3, the three-factor comprehensive protection mode is selected; where T1 is the first threshold, T2 is the second threshold, and T3 is the third threshold. T1, T2, and T3 are threshold data obtained in advance.

[0008] A further technical solution is that when a threat value is higher than the other two threat values by more than T1, the single factor working mode is selected to be executed, specifically: if T r -T w >T1 and T r -T n > T1, it is determined to be dominated by heavy rain, and the heavy rain response mode S310 is executed; if T w -T r >T1 and T w -T n > T1, it is determined to be windproof dominant, and the windproof response mode S320 is executed; if T n -T r >T1 and T n -T w When >T1, it is determined that the noise reduction is dominant and the noise reduction response mode S330 is executed.

[0009] Further technical solutions, the S310 rainstorm response mode includes: S311, perform three-segment joint verification on rainfall data, when three adjacent segments T r >T4, enter S312; if not, do not take any action; S312, controlling all sound insulation panels to tilt to above 20 degrees at a rate greater than or equal to 5 degrees / s, and executing S313 simultaneously; S313, open the drain valve according to the R value step: when R>30mm / h, open 100% of the valve; when R>15mm / h, open 50%; The S320 wind response mode includes: S321, when T w >T5, start the asymmetric tilt angle strategy: the tilt angle of the upwind section = the reference angle + 8°; the tilt angle of the downwind section = the reference angle - 3°; S322: If v > 25 m / s, the sound absorption module is forced to be lowered to the lowest position; The S330 noise reduction response modes include: S331, when T n >T6: If the main frequency of the noise is less than 500Hz, increase the height of the sound absorption module to the upper limit; If the main frequency of the noise is greater than 2KHz, reduce the height of the sound absorption module and activate the surface micro-perforation array; Among them, T4 is the fourth threshold, T5 is the fifth threshold, and T6 is the sixth threshold. T4, T5 and T6 are all threshold data obtained by pre-calibration.

[0010] Further technical solution, if T r 、T w When the threat value is greater than T2, the two-factor composite mode is selected, specifically: if T r >T2 and T w > T2, the windproof response mode S320 is executed first, and after a delay of 30 seconds, the S313 is executed, and the drain valve is opened step by step according to the R value: when R>30mm / h, the valve is opened 100%; when R>15mm / h, the valve is opened 50%; If T r 、T w 、T n All are greater than T3, choose to execute the three-factor comprehensive protection mode, specifically: if T r 、T w 、T n If both are greater than T3, the S320 wind protection response mode will be executed first. After a delay of 30 seconds, 100% of the drain valves will be opened and the sound and light alarm will be triggered.

[0011] A further technical solution also includes S40, which uses a 2-minute sliding average filter on the wind speed data to eliminate instantaneous pulsation interference.

[0012] Further technical solutions also include S50, updating parameters based on historical data every month: When the success rate of the rainstorm response model is greater than 90%, the R max Value 5%; When the number of wind response mode is greater than 3 times, the v max Worth 10%.

[0013] Further technical solutions, S60, the sound insulation board automatically resets to the vertical state at 04:00 every day, and performs sensor zero point calibration.

[0014] In summary, the present invention has the following beneficial effects: It calculates the dynamic threat value in real time through noise, wind speed, and rainfall, accurately identifies rainstorm, strong wind, and noise-dominated scenes by combining a nonlinear weight model, and realizes intelligent switching among single-factor, dual-factor, and triple-factor composite modes, thereby improving response speed; The tilt-adjustable sound insulation panels are driven by servo motors and harmonic reducers. The asymmetric tilt strategy reduces wind loads and improves wind resistance. The hydrophobic nano-coating reduces water retention. The lifting sound absorption module is activated by a hydraulic cylinder driving a micro-perforated array to improve sound absorption capacity, and the combined design of the guide ridge optimizes the rainwater drainage path; The solenoid valve group is controlled according to the rainfall steps and cooperates with the three-section joint verification algorithm to avoid false triggering and prevent roadbed scour. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings: Figure 1 It is a flow chart of the control method of the sound barrier control system of the present application. DETAILED DESCRIPTION

[0016] In order to more clearly illustrate the overall concept of the present application, a detailed description is given below in an illustrative manner in conjunction with the accompanying drawings.

[0017] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0018] In addition, in the description of the present application, it should be understood that the terms "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0019] In this application, unless otherwise expressly specified or limited, terms such as "installed," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0020] In this application, unless otherwise expressly specified and limited, a first feature "above" or "below" a second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0021] like Figure 1 As shown, a sound barrier control system and a control method thereof, wherein the sound barrier control system includes several independent control sections divided along the length direction of the sound barrier, and each section is configured with: an environment detection unit, an execution unit, and a section control unit.

[0022] In one embodiment, the environmental detection unit includes a noise sensor, an anemometer and a rain gauge, which are installed on the columns of the sound barrier; the execution unit includes an inclination-adjustable sound insulation board, a lifting sound absorption module and a drainage valve group; the section control unit is communicatively connected to the central controller.

[0023] Specifically, the noise sensor uses an A-weighted sound pressure meter with a measuring range of 30~130dB (A) and an accuracy of ±0.5dB; the anemometer can use an ultrasonic type with a measuring range of 0~40m / s and a wind direction resolution of 1°; the rain gauge uses a tipping bucket type with a resolution of 0.1mm.

[0024] The inclination-adjustable sound insulation board has a base material of galvanized steel plate with a thickness of 1.2mm. Its inclination is adjusted by a rotating mechanism, and an asymmetric inclination strategy is implemented. The rotating mechanism includes a servo motor and a harmonic reducer with a reduction ratio of 1 to 50. The rotating mechanism constitutes an angle feedback sensor, and the angle feedback is provided by an absolute encoder with an accuracy of ±0.1°. Surface treatment: The surface of the sound insulation board is covered with a hydrophobic nano-coating.

[0025] The lifting sound absorption module is composed of a perforated aluminum plate and centrifugal glass wool. The perforation rate of the perforated aluminum plate is 25%, and the density of the centrifugal glass wool is 80kg / m 3 The lifting of the lifting sound absorption module is driven by a hydraulic cylinder with a stroke of 0~30cm and a thrust of 5KN. The diameter of the micro-perforation array is 0.2mm. The micro-holes are formed by laser processing. The hole center distance can be 1.2mm. They are distributed in a rectangular array and are covered by a sealing pressure plate before activation.

[0026] The drainage valve group is controlled by a solenoid valve, with a diameter of DN50 and is arranged at one per meter of sound barrier.

[0027] The central controller of the control unit can adopt an industrial computer, run the Linux system, and make decisions on global instructions. The segment controller can adopt the STM32F407 chip to process the data of this segment in real time.

[0028] Specifically, the layout of the inclination-adjustable sound insulation panels, lifting sound absorption modules, and drainage valve groups on the sound barrier is as follows: the top layer is the inclination-adjustable sound insulation panel, which is located between 4m and 5m high and functions as the main sound reflection area. The panel is 1m high, and the center elevation of the rotating axis of the rotating mechanism is 4.5m. The servo motor and harmonic reducer are installed in the mounting columns of the sound barrier. The middle layer is a liftable sound absorption module, facing the sound-facing surface. Its height is between 2m and 4m, and its function is to act as the core noise absorption area. The entire module is 1.8m high and has an adjustable height range. The liftable sound absorption module is also equipped with a diversion ridge to guide rainwater into the sump. The bottom layer is a drainage valve group and a water collection tank with a height range of 0~0.5m. Its main function is to collect and discharge rainwater. The water collection tank is located at the bottom of the sound barrier to collect water on the sound barrier. There are multiple solenoid valves in the water collection tank. Multiple solenoid valves can be set up with one every 1m to control the opening and closing of drainage. An anti-blocking filter is set at the water inlet of the valve body to intercept debris such as leaves. The solenoid valve is connected to the water pipe to facilitate the discharge of rainwater. The drainage valve group can prevent rainwater from directly eroding the roadbed, causing damage and subsidence to the roadbed.

[0029] There is a gap between the lower edge of the inclination-adjustable sound insulation board and the top of the lifting sound absorption module, and the gap distance is 10 mm to ensure that there is no interference when the inclination of the inclination-adjustable sound insulation board changes.

[0030] The top surface of the sump is higher than the ground level to prevent water splashing from the road from invading.

[0031] A method for controlling a sound barrier control system, characterized by comprising the following steps: S10, real-time collection of noise sound pressure level L in each control section P , real-time wind speed v and real-time rainfall R; S20. Calculate the dynamic threat value of each environmental factor: Heavy rain threat value T r =α*(R / R max ) 2 ; Strong wind threat value T w =β*(v / v max ) 3 ; Noise threat value T n =η*(L p / L max ); Where: R max is the pre-calibrated maximum real-time rainfall value, v max is the pre-calibrated maximum real-time wind speed, L max is the pre-calibrated maximum noise pain threshold, α is the pre-calibrated correction coefficient for the rainstorm threat value, β is the pre-calibrated correction coefficient for the strong wind threat value, and η is the pre-calibrated correction coefficient for the noise threat value; S30, according to T r 、T w and T n The value is compared with the pre-calibrated threshold data and the corresponding working mode is selected.

[0032] Further technical solution, said S30, according to T r 、T w and T n The value of is compared with the pre-calibrated threshold data, and the corresponding working mode is selected. Specifically, when a threat value is higher than the other two threat values by more than T1, the single factor working mode is selected; if T r 、T w When the threat values are all greater than T2, the dual-factor composite mode is selected; if T r 、T w 、T nIf all of them are greater than T3, the three-factor comprehensive protection mode is selected; where T1 is the first threshold, T2 is the second threshold, and T3 is the third threshold. T1, T2, and T3 are threshold data obtained in advance.

[0033] Specifically, the first threshold T1 is the single-factor dominant threshold difference. Its calibration basis is based on the independent occurrence frequency of three types of threats, namely heavy rain, strong wind, and noise, in historical environmental data and the engineering safety redundancy. The difference threshold is determined through statistical analysis.

[0034] T1 is used to determine whether a single environmental factor significantly dominates the system response. For example, if the rainstorm threat value T r Significantly higher than wind threat T w and noise threat T n , and the difference exceeds T1, it is determined to be a heavy rain-dominated mode. This threshold is determined by analyzing the independent occurrence probability of extreme weather in historical meteorological data, such as the asynchrony between heavy rain and strong winds, and combining the safety factor of the sound barrier structure under a single load, such as the wind pressure design value and drainage capacity redundancy.

[0035] The second threshold value T2 is a dual-factor composite threshold value, which is calibrated based on reference industry safety specifications, such as the risk level classification of dual-factor coupling in the "Technical Specifications for Railway Sound Barrier Engineering", combined with the critical response data of wind tunnel tests and numerical simulations. When the threat values of heavy rain and strong winds exceed T2 at the same time, the system needs to respond to the wind protection mode first to avoid structural instability. The setting of T2 is based on the influence of the superposition of dual factors on the dynamic response of the sound barrier, such as the coupling of wind load and rain resulting in an increase in overturning moment. The critical threshold of structural instability is determined through finite element analysis, and a 20% safety margin is considered.

[0036] The third threshold, T3, represents a three-factor integrated protection threshold. Its calibration is based on complex disaster cases in the extreme climate event database, such as typhoons and heavy rainstorms, combined with experimental data on the ultimate bearing capacity of sound barrier materials and structures. T3 is the threshold at which heavy rain, high winds, and noise simultaneously reach their highest threat levels. This calibration requires multi-physics coupled simulations, such as fluid-structure interaction analysis, to verify the overall stability of the sound barrier under extreme conditions. It also references critical parameters that have caused sound barrier failure in historical disasters, such as the combination of maximum wind speed and rainfall intensity.

[0037] A further technical solution is that when a threat value is higher than the other two threat values by more than T1, the single factor working mode is selected to be executed, specifically: if T r -T w >T1 and T r -T n > T1, it is determined to be dominated by heavy rain, and the heavy rain response mode S310 is executed; if T w -T r >T1 and Tw -T n > T1, it is determined to be windproof dominant, and the windproof response mode S320 is executed; if T n -T r >T1 and T n -T w When >T1, it is determined that the noise reduction is dominant and the noise reduction response mode S330 is executed.

[0038] Further technical solutions, the S310 rainstorm response mode includes: S311, perform three-segment joint verification on rainfall data, when T is detected in three adjacent segments, r >T4, then enter S312; if not, then do nothing; S312, controlling all sound insulation panels to tilt to above 20 degrees at a rate greater than or equal to 5 degrees / s, and executing S313 simultaneously; S313, open the drain valve according to the R value step: when R>30mm / h, open 100% of the valve; when R>15mm / h, open 50%; The S320 wind response mode includes: S321, when T w >T5, start the asymmetric tilt angle strategy: the tilt angle of the upwind section = the reference angle + 8°; the tilt angle of the downwind section = the reference angle - 3°; S322: If v > 25 m / s, the sound absorption module is forced to be lowered to the lowest position; The S330 noise reduction response modes include: S331, when T n >T6: If the main frequency of the noise is less than 500Hz, increase the height of the sound absorption module to the upper limit; If the main frequency of the noise is greater than 2KHz, reduce the height of the sound absorption module and activate the surface micro-perforation array; Among them, T4 is the fourth threshold, T5 is the fifth threshold, and T6 is the sixth threshold. T4, T5 and T6 are all threshold data obtained by pre-calibration.

[0039] The fourth threshold, T4, is the combined verification threshold for three rainstorm zones. Its calibration is based on the principle of spatial continuity, analyzing the spatiotemporal consistency of rainfall data from adjacent zones using a sliding window algorithm, and incorporating the drainage system's design flow rate. T4 is used to prevent localized false triggering of drainage responses. For example, when rainfall in three adjacent zones exceeds T4, it is considered a regional rainstorm event, preventing malfunctions caused by single-point sensor failures. This threshold is determined by the spatial distribution characteristics of historical rainfall events, such as the continuity of the rainstorm front, and the response delay of the drainage valve group.

[0040] The fifth threshold, T5, activates high-wind mode. Its calibration is based on wind speed limits specified in the wind-resistant design code for building structures, combined with mechanical simulation results of the asymmetric tilt strategy for sound barriers. T5 is the critical wind speed for activating the asymmetric tilt strategy. This calibration requires wind tunnel testing to verify the lift coefficient variation of the sound barrier at different tilt angles. This ensures that, when wind speed reaches T5, increasing the upwind tilt angle effectively reduces wind loads, while decreasing the downwind tilt angle to avoid aerodynamic interference.

[0041] The sixth threshold, T6, represents the noise dominant frequency response threshold. Its calibration is based on the frequency distribution of typical traffic noise in a noise spectrum database and acoustic performance test data from the microperforated array of the sound absorption module. T6 determines whether the dominant noise frequency exceeds the optimized frequency band of the sound absorption module. For example, if the frequency exceeds 2kHz, the microperforations should be activated to enhance high-frequency sound absorption. This threshold is determined by measuring the insertion loss curves of noise at different frequencies to determine the frequency range corresponding to the peak sound absorption coefficient, with a 10% frequency bandwidth margin.

[0042] Further technical solution, if T r 、T w When the threat value is greater than T2, the two-factor composite mode is selected, specifically: if T r >T2 and T w > T2, the windproof response mode S320 is executed first, and after a delay of 30 seconds, the S313 is executed, and the drain valve is opened step by step according to the R value: when R>30mm / h, the valve is opened 100%; when R>15mm / h, the valve is opened 50%; If T r 、T w 、T n All are greater than T3, choose to execute the three-factor comprehensive protection mode, specifically: if T r 、T w 、T n If both are greater than T3, the S320 wind protection response mode will be executed first. After a delay of 30 seconds, 100% of the drain valves will be opened and the sound and light alarm will be triggered.

[0043] A further technical solution also includes S40, which uses a 2-minute sliding average filter on the wind speed data to eliminate instantaneous pulsation interference.

[0044] Further technical solutions also include S50, updating parameters based on historical data every month: When the success rate of the rainstorm response model is greater than 90%, the R max Value 5%; When the number of wind response mode is greater than 3 times, the v max Worth 10%.

[0045] Further technical solutions, S60, the sound insulation board automatically resets to the vertical state at 04:00 every day, and performs sensor zero point calibration.

[0046] Specifically, R represents the real-time rainfall in millimeters per hour (mm / h). max is the pre-calibrated maximum real-time rainfall in millimeters per hour, v is the real-time wind speed in meters per second (m / s), and v max The maximum real-time wind speed value is pre-calibrated in meters per second, L max It is the pre-calibrated maximum noise pain threshold, in dB (A).

[0047] In setting R max 、v max , L max When setting the value, the maximum rainfall intensity in the history of the area should be considered. For example, it can be set to the hourly rainfall intensity of once in a hundred years. The maximum design wind speed threshold should consider the upper limit of level 10 wind speed, and the maximum noise pain threshold should consider the pain threshold sound pressure level.

[0048] T1 is the first threshold value, which is the single-factor dominant judgment threshold; T2 is the second threshold value, which is the dual-factor trigger threshold; T3 is the third threshold value, which is the three-factor comprehensive protection threshold; T4 is the fourth threshold value, which is the rainstorm mode activation threshold; T5 is the fifth threshold value, which is the windproof mode activation threshold; and T6 is the sixth threshold value, which is the noise reduction mode activation threshold. The specific values of T1 to T6 need to be dynamically calibrated according to factors such as the installation scenario, climate characteristics and sound barrier structure parameters. The example range is T1∈[0.15,0.25], T2∈[0.5,0.7], etc., but not limited to this.

[0049] Calculate the rainstorm threat value T in real time according to the formula r =α*(R / R max ) 2 , the square term can highlight the nonlinear risk of storm waterlogging; Strong wind threat value T w =β*(v / v max ) 3 , cubic term strengthens the destructive force of wind load; Noise threat value T n =η*(L p / L max ), the linear term matches the sound pressure level characteristics; In this embodiment: Set R max =60mm / h,v max =30m / s, L max =120dB; T1=0.15, T2=0.6, T3=0.9, T4=0.7, T5=0.8, T6=0.72; α=1.2, β=1.5, η=1.

[0050] Substitute the data collected during a certain period into the formula: Heavy rain threat value T r =α*(R / R max ) 2 ; Strong wind threat value T w =β*(v / v max ) 3 ; Noise threat value T n =η*(L p / L max ); The collected data are: time t=19:30, noise L p =88dB (A), wind speed v=18m / s, wind direction southeast, determined by anemometer, real-time rainfall 22mm / h.

[0051] Based on the real-time environmental factors, the value of rainstorm threat T is calculated. r =α×(R / R max ) 2 =1.2×(22 / 60) 2 ≈0.161; Strong wind threat value T w =β×(v / v max ) 3 =1.5×(18 / 30) 3 ≈0.324; Noise threat value T n =η×(L P / L max )=1.0×(88 / 120)≈0.733; Based on this, we can judge and compare the rainstorm threat value T r , strong wind threat value T w and noise threat value T n The numerical value of the judgment result T n >T w +T1 (0.733>0.324+0.15); T n >T r +T1 (0.733>0.161+0.15); It can be seen that the Tn value is greater than T r and T w , and the difference is greater than 0.15, the noise reduction response mode is activated.

[0052] S330 noise reduction response mode, including S331, determines T n >T6, using a 1024-point FFT and 1 / 3 octave division (center frequency 31.5Hz-8kHz) to determine the main frequency band. If the current noise main frequency band analysis shows that the main frequency is 320Hz < 500Hz, it is determined to execute the sound absorption module to the upper limit of the height, and the angle of the sound insulation board remains unchanged. The basic angle is the vertical state of 0°. The vertical state of the sound insulation board here refers to the vertical state with respect to the horizontal ground. The vertical state mentioned in the following text refers to the vertical state with respect to the horizontal ground. If the current main frequency band analysis of noise shows that the main frequency is 2.5KHz>2KHz, according to the rules, the height of the sound absorption module can be reduced to the lowest limit to better absorb high-frequency noise; at the same time, the micro-perforation array on the surface of the sound absorption module is activated. When the micro-perforation array is activated, the hydraulic cylinder contracts by 5mm, driving the axial displacement of the sealing pressure plate, separating the sealing pressure plate from the perforated aluminum plate, forming a 0.05mm gap, so that sound waves can enter the cavity behind through the 0.2mm micro-perforations. These micro-perforations are designed to enhance the absorption efficiency of high-frequency sound.

[0053] The data filtering process in S40 uses a 2-minute sliding average filter on the wind speed data to prevent false operation due to instantaneous gusts. Specifically: S41 determines the window range: Time window: Set the sliding window to cover a 2-minute time period; Data sampling frequency: Assuming that the system collects wind speed data once per second (i.e., 1 data point per second), 2 minutes corresponds to 120 data points.

[0054] Buffer initialization: Create an array (or queue) of fixed length to store the most recent 120 wind speed values. Initially, the array is empty or filled with historical data.

[0055] S42 real-time data update process: New data enters: Whenever the system collects a new wind speed value (for example, the data at the 121st second), it is added to the end of the buffer.

[0056] Removal of old data: If the buffer is full (120 data), remove the oldest data (that is, the data of the first second) to keep the buffer length always at 120.

[0057] Dynamic sliding: This process is continuous, and the window "slides" as new data comes in, always covering the latest 2 minutes of data.

[0058] S43 calculates the average value: Sum: Accumulate and sum all 120 wind speed values in the buffer zone.

[0059] Average: Divide the total by 120 to get the sliding average at the current moment.

[0060] Output result: The average value is used as the filtered wind speed value for subsequent judgment, such as whether to trigger the wind protection response mode.

[0061] Key operation examples: Example scenario: A sudden gust of wind is detected at a certain moment, such as a sudden increase in wind speed from 5 m / s to 20 m / s, which lasts for 10 seconds.

[0062] Filtering process: First 10 seconds: The gust data enters the buffer zone, but there is still a large amount of historically low wind speed data within the window, such as 5 m / s, and the average value is still close to the normal range.

[0063] After 10 seconds: The buffer zone is gradually covered by gust data, and the average value gradually increases, but it will not immediately trigger a false action due to instantaneous fluctuations.

[0064] After stabilization: If gusts last for more than 2 minutes, the average value will steadily increase, and the system will determine whether to implement wind protection measures based on the final average value.

[0065] Interference immunity: Suppresses short-term noise (such as wind gusts and sensor jitter) through averaging processing.

[0066] Delay control: A 2-minute window delay is acceptable because sudden changes in wind speed usually take some time to form a stable trend.

[0067] Implementation optimization: Use a circular queue data structure to avoid frequent data copying (improve efficiency).

[0068] Precalculate the total in the buffer. When new data comes in, only addition and subtraction operations are required (for example, old value = 5, new value = 20, the total changes by +15), without the need to re-accumulate each time.

[0069] Preventing false triggering in actual application scenarios: Preventing the sound absorption module from being accidentally lowered or the sound insulation board from being accidentally adjusted due to instantaneous gusts of wind.

[0070] Smooth trend judgment: Combined with the rate of change of the sliding average (such as the slope), it is possible to further distinguish between short-term fluctuations and sustained trends (such as the increase in wind speed before a typhoon).

[0071] The S50 parameter automatic update mechanism performs historical data analysis at the beginning of each month and adjusts calibration parameters: If the success rate of rainstorm response in a certain section reaches 92% in the past month, then the R max 63mm / h (original 60mm / h×1.05); If a certain section appears wind protection response mode 4 times, then lower v maxIt is 27 m / s (originally 30 m / s×0.9).

[0072] S60 automatically resets and calibrates. Every day at 4:00 AM, all zones perform the following operations: Restore the sound insulation board to a vertical state, with the vertical state being 0°, and keep it perpendicular to the horizontal ground; The sound absorption module is lowered to the lowest position; Perform zero point calibration on noise sensors and anemometers to ensure the accuracy of subsequent data.

[0073] For example, if the noise sound pressure level L P =72dB(A), real-time wind speed v=6m / s, wind direction: north wind, real-time rainfall R=50mm / h; Heavy rain threat value T r =α×(R / R max ) 2 =1.2×(50 / 60) 2 ≈1.2×0.694≈0.833; Strong wind threat value T w =β×(v / v max ) 3 =1.5×(6 / 30) 3 =1.5×0.008=0.012; Noise threat value T n =η×(L P / L max )=1.0×(72 / 120)=0.6; Make comparative judgments, T r -T w =0.833-0.012=0.821>0.15,T r -T n =0.833-0.6=0.233>0.15, which satisfies the requirement to enter the heavy rain mode and execute S310. First, S311 is performed for the joint verification of the three sections to check whether the heavy rain threat values of the three adjacent sections are all greater than T4=0.5. If so, the process goes to S312 to adjust the inclination angle of the sound insulation board and control all sound insulation boards to tilt from the vertical state to 25° at a speed of ≥5° / s. The purpose is to guide rainwater to flow to the drain outlet, reduce water accumulation and improve structural stability.

[0074] Execute S313: Open the drainage valve according to the rainfall steps. If the current rainfall R=50mm / h>30mm / h, then open the drainage valve 100%.

[0075] For example, if the noise sound pressure level L is collected, P=70dB(A), real-time wind speed v=28m / s, wind direction: northwest wind, real-time rainfall R=10mm / h, T1 is 0.15 hours; At this time, the rainstorm threat value is T r =α×(R / R max ) 2 =1.2×(10 / 60) 2 ≈0.033; Strong wind threat value T w =β×(v / v max ) 3 =1.5×(28 / 30) 3 ≈1.372; Noise threat value T n =η×(L P / L max )=1.0×(70 / 120)≈0.583; Meet T w -T r =1.372-0.033=1.339>0.15,T w -T n =1.372-0.583=0.789>0.15; Enter S320 wind protection response mode, execute S321: start asymmetric tilt strategy, when T w >T5, start the asymmetric tilt strategy.

[0076] Assume T5=0.8, current T w =1.372>0.8 meets the conditions.

[0077] The inclination angle of the upwind section = reference angle + 8°; the inclination angle of the downwind section = reference angle - 3°.

[0078] The reference angle is assumed to be vertical (0°), then the upwind side is adjusted to +8° to reduce the windward projection area and lower the peak wind load, and the downwind side is adjusted to -3° to suppress the wake vortex and avoid resonance instability.

[0079] The determination of the upwind and downwind sides is based on the geometric relationship between the wind direction and the sound barrier. The core is the relative orientation of the airflow direction and the structure. The section control unit can make the determination based on the data collected by the anemometer and wind direction meter and the normal direction of the section. For example, the anemometer collects the current wind direction and wind speed data in real time. Each sound barrier section is preset with a fixed direction during design, that is, the orientation of the sound barrier, such as the horizontal direction perpendicular to the length of the sound barrier. When the wind direction is opposite to the section normal direction, the section is on the upwind side. When the wind direction is the same as the section normal direction, the section is on the downwind side. It can also be simply understood as the upwind side is the direction from which the wind comes, and the downwind side is the direction from which the wind goes. For example, if the real-time wind direction is northwest and the wind blows from northwest to southeast, the upwind side is the northwest side of the sound barrier, and the downwind side is the southeast side of the sound barrier. The inclination angle is adjusted so that the upwind side section tilts in the direction from which the wind comes, that is, the inclination angle is increased (+8°), and the downwind side section tilts in the direction from which the wind goes, that is, the inclination angle is reduced (-3°).

[0080] S322: Forcefully lower the sound absorption module: If the wind speed exceeds 25 m / s, the sound absorption module is forced to be lowered to the lowest position.

[0081] The current wind speed v=28m / s>25m / s, so the sound absorption module drops to the lowest position (0cm).

[0082] This can effectively reduce the impact of strong winds on the sound insulation panels and protect the sound absorption modules from damage. In addition, by adjusting the angle of the sound insulation panels to adapt to the wind direction, the safety and stability of the structure can be improved.

[0083] Example of executing the two-factor composite model: Noise sound pressure level L P =80dB(A), real-time wind speed v=26m / s, wind direction: southeast wind, real-time rainfall R=40mm / h, set T2=0.5, T4=0.4; Calculated: Heavy rain threat value T r =α×(R / R max ) 2 =1.2×(40 / 60) 2 ≈1.2×0.444≈0.533; Strong wind threat value T w =β×(v / v max ) 3 =1.5×(26 / 30) 3 =1.5×0.657≈0.986; Noise threat value T n =η×(L P / L max )=1.0×(80 / 120)=0.65; Judge T r=0.533>T2(0.5),T w =0.986>T2, prioritize wind protection mode: S321: Start asymmetric tilt strategy: When T w >T5 (assuming T5=0.6), start the asymmetric tilt strategy: The inclination angle of the upwind section = reference angle + 8°; The downwind section inclination angle = reference angle - 3°; Assuming the reference angle is vertical (0°), adjust the upwind side to +8° and the downwind side to -3°.

[0084] S322: Forced lowering of the sound absorption module: If the wind speed exceeds 25m / s, the sound absorption module will be forced to move to the lowest position.

[0085] The current wind speed v=26m / s>25m / s, the sound absorption module is lowered to the lowest position (0cm) and the drainage valve is opened according to the rainfall level; If the current rainfall R=40mm / h>30mm / h, 100% of the drainage valves will be opened.

[0086] Anything not described in this application can be achieved by adopting or drawing on existing technologies.

[0087] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments.

[0088] The foregoing is merely an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should all be included within the scope of the claims of the present application.

Claims

1. A sound barrier control system, characterized in that: It includes several independent control sections divided along the length of the sound barrier, and each section is equipped with: an environmental detection unit, an execution unit, and a section control unit.

2. A sound barrier control system according to claim 1, characterized in that: The environmental detection unit includes a noise sensor, an anemometer and a rain gauge; The execution unit includes an inclination-adjustable sound insulation board, a lifting sound absorption module and a drainage valve group; The section control unit is in communication with the central controller; The rotating mechanism of the sound insulation board constitutes an angle feedback sensor. The surface of the sound insulation board is covered with a hydrophobic coating, and the surface of the sound absorption module is provided with a micro-perforation array.

3. A control method for a sound barrier control system, characterized in that: The following steps are involved: S10, real-time collection of noise sound pressure level L in each control section P , real-time wind speed v and real-time rainfall R; S20. Calculate the dynamic threat value of each environmental factor: Heavy rain threat value T r =α*(R / R max ) 2 ; Strong wind threat value T w =β*(v / v max ) 3 ; Noise threat value T n =η*(L p / L max ); Where: R max is the pre-calibrated maximum real-time rainfall value, v max is the pre-calibrated maximum real-time wind speed, L max is the pre-calibrated maximum noise pain threshold, α is the pre-calibrated correction coefficient for the rainstorm threat value, β is the pre-calibrated correction coefficient for the strong wind threat value, and η is the pre-calibrated correction coefficient for the noise threat value; S30, according to T r 、T w and T n The value is compared with the pre-calibrated threshold data and the corresponding working mode is selected.

4. The control method of a sound barrier control system according to claim 3, characterized in that: Said S30, according to T r 、T w and T n The value of is compared with the pre-calibrated threshold data, and the corresponding working mode is selected. Specifically, when a threat value is higher than the other two threat values by more than T1, the single factor working mode is selected; if T r 、T w When the threat values are all greater than T2, the dual-factor composite mode is selected; if T r 、T w 、T n If all of them are greater than T3, the three-factor comprehensive protection mode is selected; where T1 is the first threshold, T2 is the second threshold, and T3 is the third threshold. T1, T2, and T3 are threshold data obtained in advance.

5. The control method of a sound barrier control system according to claim 4, characterized in that: When a threat value is higher than the other two threat values by more than T1, the single factor working mode is selected to be executed, specifically: if T r -T w >T1 and T r -T n > T1, it is determined to be dominated by heavy rain, and the heavy rain response mode S310 is executed; if T w -T r >T1 and T w -T n > T1, it is determined to be windproof dominant, and the windproof response mode S320 is executed; if T n -T r >T1 and T n -T w When >T1, it is determined that the noise reduction is dominant and the noise reduction response mode S330 is executed.

6. The control method of a sound barrier control system according to claim 5, characterized in that: The S310 rainstorm response mode includes: S311, perform three-segment joint verification on rainfall data, when three adjacent segments T r >T4, enter S312; if not, do not take any action; S312, controlling all sound insulation panels to tilt to above 20 degrees at a rate greater than or equal to 5 degrees / s, and executing S313 simultaneously; S313, open the drain valve according to the R value step: when R>30mm / h, open 100% of the valve; when R>15mm / h, open 50%; The S320 wind response mode includes: S321, when T w >T5, start the asymmetric tilt angle strategy: the tilt angle of the upwind section = the reference angle + 8°; the tilt angle of the downwind section = the reference angle - 3°; S322: If v > 25 m / s, the sound absorption module is forced to be lowered to the lowest position; The S330 noise reduction response modes include: S331, when T n >T6: If the main frequency of the noise is less than 500Hz, increase the height of the sound absorption module to the upper limit; If the main frequency of the noise is greater than 2KHz, reduce the height of the sound absorption module and activate the surface micro-perforation array; Among them, T4 is the fourth threshold, T5 is the fifth threshold, and T6 is the sixth threshold. T4, T5 and T6 are all threshold data obtained by pre-calibration.

7. The control method of a sound barrier control system according to claim 6, characterized in that: If T r 、T w When the threat value is greater than T2, the two-factor composite mode is selected, specifically: if T r >T2 and T w > T2, the windproof response mode S320 is executed first, and after a delay of 30 seconds, the S313 is executed, and the drain valve is opened step by step according to the R value: when R>30mm / h, the valve is opened 100%; when R>15mm / h, the valve is opened 50%; If T r 、T w 、T n All are greater than T3, choose to execute the three-factor comprehensive protection mode, specifically: if T r 、T w 、T n If both are greater than T3, the S320 wind protection response mode will be executed first. After a delay of 30 seconds, 100% of the drain valves will be opened and the sound and light alarm will be triggered.

8. The control method of a sound barrier control system according to claim 6, characterized in that: It also includes S40, which uses a 2-minute sliding average filter on the wind speed data to eliminate instantaneous pulse interference.

9. The control method of a sound barrier control system according to claim 7, characterized in that: Also includes S50, monthly updated parameters based on historical data: When the success rate of the rainstorm response model is greater than 90%, the R max Value 5%; When the number of wind response mode is greater than 3 times, the v max Worth 10%.

10. The control method of a sound barrier control system according to claim 9, characterized in that: S60: At 04:00 every day, the sound insulation board automatically resets to the vertical position and performs the sensor zero point calibration.

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