Sound absorbing guard rail

Abstract

The application relates to a sound-absorbing guard, when a noise sensing assembly receives noise emitted from outside, the rotation time of a driving piece is adjusted according to the sound frequency of the noise, the driving piece drives a noise-absorbing shaft to rotate, the first sound-absorbing area, the second sound-absorbing area and the third sound-absorbing area are used for absorbing noise of different frequencies, one of the first sound-absorbing area, the second sound-absorbing area and the third sound-absorbing area is aligned with the generation direction of the noise to absorb the energy of the noise and reduce the noise. The positions of the first sound-absorbing area, the second sound-absorbing area and the third sound-absorbing area are adjusted according to noise of different frequencies, so that better sound-absorbing effect is obtained, and the problem that noise of different frequencies cannot be better absorbed, leading to poor noise-absorbing effect, is solved.

Description

Technical Field

[0001] This invention relates to the technical field of guardrails, and more particularly to a sound-absorbing guardrail. Background Technology

[0002] Fences generally refer to fences, railings, or other barriers that surround an area or object to provide protection, security, and isolation.

[0003] With the widespread use of guardrails, they have also been given different functions, such as reducing noise pollution in noisy places, such as residential areas near highways or industrial zones.

[0004] Chinese patent publication CN103485290B discloses a method to prevent noise transmission by using a first sound-absorbing barrier, a second sound-absorbing barrier, and a sound-insulating barrier. A weighted pressure plate is installed at the lower end of the second sound-absorbing barrier, and a pressure-generating device is located below the pressure plate. This device includes a piezoelectric material layer, wires, and a battery. This method converts sound energy into electrical energy for storage, achieving energy collection. Because different noises have different frequencies, different materials or sound-absorbing barriers with different frequencies are needed for sound absorption. However, external sound barriers used in rail transit cannot effectively absorb noise of different frequencies, resulting in poor noise absorption.

[0005] Therefore, there is an urgent need for a sound-absorbing guardrail to solve the problem of poor noise absorption due to the inability to effectively absorb noise at different frequencies. Summary of the Invention

[0006] The purpose of this invention is to provide a sound-absorbing guardrail to solve the problem of poor noise absorption due to the inability to effectively absorb noise of different frequencies.

[0007] According to one aspect of the present invention, a sound-absorbing guardrail is provided, the sound-absorbing guardrail comprising:

[0008] The main body of the guardrail;

[0009] A noise sensing component is provided on the main body of the guardrail;

[0010] A noise absorption shaft is rotatably mounted on the guardrail body. The circumferential surface of the noise absorption shaft is provided with a first sound absorption area, a second sound absorption area, and a third sound absorption area. The first sound absorption area, the second sound absorption area, and the third sound absorption area are used to absorb noise of different frequencies.

[0011] A driving component is disposed on the main body of the guardrail, and the driving component is fixedly connected to the noise absorption shaft;

[0012] The noise sensing component is used to control the movement of the drive component so that the noise absorption shaft adjusts the position of the first sound absorption area, the second sound absorption area, or the third sound absorption area according to different frequencies of noise.

[0013] In at least one embodiment of this application, the noise sensing component includes:

[0014] The sensor housing has a movable groove and an opening communicating with the movable groove, the opening communicating with the outside, and the sensor housing is disposed on the guardrail body;

[0015] A diaphragm is disposed at the opening, and the diaphragm is used to receive the vibration frequency of external noise;

[0016] Foam balls are placed inside the movable groove;

[0017] The sensor housing is provided with a first sensing position, a second sensing position and a third sensing position in the vertical direction, and the first sensing position, the second sensing position and the third sensing position are arranged sequentially in the movable groove in the vertical direction;

[0018] The diaphragm vibrates to drive the foam ball to move in the movable groove along the vertical direction. The first sensing position, the second sensing position, or the third sensing position senses the position of the foam ball to adjust the position of the first sound-absorbing area, the second sound-absorbing area, or the third sound-absorbing area.

[0019] In at least one embodiment of this application, the first sensing position is provided with a first slot and four second slots, and the first slot and the four second slots are all connected to the active slot;

[0020] The first sensing position includes:

[0021] A light emitter is disposed within the first slot;

[0022] Four reflectors are respectively disposed in the four second slots;

[0023] A light sensor is located in the first slot;

[0024] The light emitted by the light emitter is reflected by the four reflectors to the light sensor, and forms a first light grid in the movable slot.

[0025] In at least one embodiment of this application, the first slot and the four second slots are arranged in a pentagram on the same horizontal plane.

[0026] In at least one embodiment of this application, the diaphragm is disposed close to the ground, and the center of the diaphragm is provided with a groove that is recessed towards the ground;

[0027] In the initial state, the foam ball is located within the groove.

[0028] In at least one embodiment of this application, the first sensing bit, the second sensing bit, and the third sensing bit have the same structure.

[0029] In at least one embodiment of this application, the first sound-absorbing area is provided with a first sound-absorbing hole;

[0030] The second sound-absorbing area is provided with a second sound-absorbing hole;

[0031] The third sound-absorbing area is provided with a third sound-absorbing hole;

[0032] The diameter of the first sound-absorbing hole is denoted as a, the diameter of the second sound-absorbing hole is denoted as b, and the diameter of the third sound-absorbing hole is denoted as c, satisfying the relationship: a > b > c.

[0033] In at least one embodiment of this application, a plurality of protrusions are provided alternately within the first sound-absorbing hole, the protrusions being used to absorb sound waves.

[0034] In at least one embodiment of this application, the second sound-absorbing hole is arc-shaped along the axis of the noise absorption shaft.

[0035] In at least one embodiment of this application, the inner wall of the third sound-absorbing hole is provided with an arc surface that protrudes in the direction of the axis of the third sound-absorbing hole.

[0036] Implementing the embodiments of the present invention will have the following beneficial effects:

[0037] In this embodiment, the sound-absorbing guardrail, when the noise sensing component receives external noise, adjusts the rotation time of the driving component according to the frequency of the noise. The driving component drives the noise absorption shaft to rotate. The first, second, and third sound-absorbing areas are used to absorb noise of different frequencies, aligning one of the first, second, or third sound-absorbing areas with the direction of noise generation to absorb noise energy and reduce noise. By adjusting the position of the first, second, or third sound-absorbing areas according to different noise frequencies, a better sound absorption effect is obtained, solving the problem of poor noise absorption due to the inability to effectively absorb noise of different frequencies. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 This is a schematic diagram of the structure of a sound-absorbing guardrail according to an embodiment of the present invention;

[0040] Figure 2 for Figure 1 An exploded view of the sound-absorbing guardrail in the picture;

[0041] Figure 3 for Figure 1 A cross-sectional view of the sound-absorbing guardrail in the middle;

[0042] Figure 4 for Figure 1 Another sectional view of the sound-absorbing guardrail in the picture;

[0043] Figure 5 for Figure 2 Exploded view of the noise sensing component.

[0044] Of which: 100, sound-absorbing guardrail; 10, guardrail body;

[0045] 110. Noise sensing component; 111. Sensor housing; 111a. Movable slot; 111b. Opening; 112. Diaphragm; 112a. Groove; 113. Foam ball; 114. First sensing position; 114a. First slot; 114b. Second slot; 1141. Light emitter; 1142. Reflector; 1143. Light sensor; 115. Second sensing position; 116. Third sensing position;

[0046] 120. Noise absorption shaft; 121. First sound absorption area; 121a. First sound absorption hole; 1211. Protrusion; 122. Second sound absorption area; 122a. Second sound absorption hole; 123. Third sound absorption area; 123a. Third sound absorption hole; 123b. Curved surface;

[0047] 130. Drive components. Detailed Implementation

[0048] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0049] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0050] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0051] Please refer to Figures 1-3 One embodiment of the present invention provides a sound-absorbing guardrail. The sound-absorbing guardrail 100 in this embodiment includes:

[0052] Guardrail body 10;

[0053] A noise sensing component 110 is disposed on the guardrail body 10;

[0054] The noise absorption shaft 120 is rotatably mounted on the guardrail body 10. The circumferential surface of the noise absorption shaft 120 is provided with a first sound absorption area 121, a second sound absorption area 122 and a third sound absorption area 123. The first sound absorption area 121, the second sound absorption area 122 and the third sound absorption area 123 are used to absorb noise of different frequencies.

[0055] A drive component 130 is disposed on the guardrail body 10, and the drive component 130 is fixedly connected to the noise absorption shaft 120;

[0056] The noise sensing component 110 is used to control the movement of the drive component 130 so that the noise absorption shaft 120 adjusts the position of the first sound absorption area 121, the second sound absorption area 122, or the third sound absorption area 123 according to different frequencies of noise.

[0057] In this embodiment, when the noise sensing component 110 receives externally emitted noise, it adjusts the rotation time of the driving component 130 according to the frequency of the noise. The driving component 130 drives the noise absorption shaft 120 to rotate. The first sound-absorbing area 121, the second sound-absorbing area 122, and the third sound-absorbing area 123 are used to absorb noise of different frequencies, so that one of the first sound-absorbing area 121, the second sound-absorbing area 122, or the third sound-absorbing area 123 is aligned with the direction of noise generation to absorb noise energy and reduce noise. By adjusting the position of the first sound-absorbing area 121, the second sound-absorbing area 122, or the third sound-absorbing area 123 according to different noise frequencies, a better sound absorption effect can be obtained, thus solving the problem of poor noise absorption due to the inability to better absorb noise of different frequencies.

[0058] It should be noted that the guardrail body 10 is square in shape; the noise absorption shaft 120 is cylindrical and is wrapped with sound-absorbing material, such as foam plastic, honeycomb structure material, ceramic microporous material or sound-absorbing coating (acrylic polymer, vinyl acid polymer, polyurethane, etc.); in this embodiment, honeycomb structure material is used.

[0059] The drive component 130 is a drive motor to drive the noise absorption shaft 120 to rotate.

[0060] The first sound-absorbing zone 121, the second sound-absorbing zone 122, and the third sound-absorbing zone 123 are used to absorb sounds of different frequencies.

[0061] In at least one embodiment of this application, the noise sensing component 110 includes:

[0062] The sensor housing 111 has a movable groove 111a and an opening 111b communicating with the movable groove 111a. The opening 111b communicates with the outside. The sensor housing 111 is disposed on the guardrail body 10.

[0063] A diaphragm 112 is disposed at the opening 111b, and the diaphragm 112 is used to receive the vibration frequency of external noise;

[0064] Foam ball 113 is disposed in the movable groove 111a;

[0065] The sensor housing 111 is provided with a first sensing position 114, a second sensing position 115 and a third sensing position 116 in the vertical direction. The first sensing position 114, the second sensing position 115 and the third sensing position 116 are arranged sequentially in the movable groove 111a in the vertical direction.

[0066] The diaphragm 112 vibrates to drive the foam ball 113 to move along the vertical direction in the movable groove 111a. The first sensing position 114, the second sensing position 115 or the third sensing position 116 senses the position of the foam ball 113 to adjust the position of the first sound-absorbing area 121, the second sound-absorbing area 122 or the third sound-absorbing area 123.

[0067] Please refer to Figures 1-5 In this embodiment, when external noise is transmitted to the diaphragm 112, the diaphragm 112 vibrates and causes the foam ball 113 to move vertically within the movable groove 111a.

[0068] The position of the foam ball 113 in the movable groove 111a is captured by the sensing position. The first sensing position 114, the second sensing position 115 or the third sensing position 116 sense the position of the foam ball 113 and determine the frequency range of the noise based on its position.

[0069] Based on the sensed frequency, the output shaft of the drive unit 130 is controlled to rotate, thereby driving the noise absorption shaft 120 to rotate at a certain angle, adjusting the position of the first sound absorption area 121, the second sound absorption area 122, or the third sound absorption area 123 on the noise absorption shaft 120 so that it matches the frequency of the noise.

[0070] This adaptive adjustment ensures that noise of different frequencies can be effectively absorbed, reducing the level of environmental noise.

[0071] It should be noted that the diaphragm 112 is a circular diaphragm, which may be made of plastic, metal or other composite materials, and is used to receive external noise and generate vibration.

[0072] The sensor housing 111 is responsible for fixing the noise sensing component 110 and forms an opening 111b that connects the movable groove 111a to the outside. It provides a structural foundation for the diaphragm 112 and the foam ball 113, ensuring the stability and accuracy of the sensing process.

[0073] The diaphragm 112 is located at the opening 111b and is used to receive the vibration frequency of external noise. It converts sound wave energy into vibrational energy, which, in conjunction with the position of the foam ball 113, provides feedback for controlling the sound-absorbing guardrail 100.

[0074] Foam balls 113 are positioned within the movable groove 111a and move vertically within the groove 111a via vibration of the diaphragm 112. Providing visual feedback of the vibration frequency through physical means simplifies the inductive sound-absorbing guardrail 100 and reduces costs.

[0075] Foam Ball 113 is made of foam and is spherical in shape.

[0076] The first sensing position 114, the second sensing position 115, and the third sensing position 116 are sequentially arranged vertically within the movable groove 111a to sense the position of the foam ball 113, thereby adjusting the position of the sound-absorbing area. This provides precise sensing of noise frequency to adaptively adjust the position of the sound-absorbing area for better sound absorption.

[0077] This sound-absorbing guardrail 100 can be applied to busy urban roads, automatically sensing traffic noise and absorbing it to improve the living environment of surrounding residents.

[0078] In factories or industrial areas, such sound-absorbing guardrails 100 can automatically adjust according to the noise frequency generated by different machines, reducing noise pollution to the surrounding environment.

[0079] Setting up sound-absorbing guardrails around the construction site can effectively reduce the impact of construction noise on nearby residential areas.

[0080] In at least one embodiment of this application, the first sensing position 114 is provided with a first slot 114a and four second slots 114b, and the first slot 114a and the four second slots 114b are all connected to the active slot 111a.

[0081] The first sensing position 114 includes:

[0082] A light emitter 1141 is disposed in the first slot 114a;

[0083] Four reflectors 1142 are respectively disposed in the four second slots 114b;

[0084] A light sensor 1143 is disposed in the first slot 114a;

[0085] The light emitted by the light emitter 1141 is reflected by the four reflectors 1142 onto the light sensor 1143, and forms a first light grid (not shown in the figure) in the movable slot 111a.

[0086] In this embodiment, the light emitter 1141 emits light from the first slot 114a. The light is reflected sequentially by four mirrors 1142, forming a first light grid within the movable slot 111a.

[0087] When external noise causes the diaphragm 112 to vibrate, the foam ball 113 moves vertically in the movable groove 111a, enters the light grid, and changes the reflection path of the light grid, so that the light sensor 1143 does not receive the light signal.

[0088] Since the light sensor 1143 does not receive a light signal, it sends a first signal to the drive unit 130. The first signal indicates the angle that the noise absorption shaft 120 needs to rotate, thereby driving the noise absorption shaft 120 to rotate.

[0089] By utilizing the reflection of light and the movement of the foam ball 113, noise of different frequencies can be accurately sensed, and the position of the noise absorption shaft 120 can be adjusted according to the noise frequency, providing a sensitive and precise noise control method.

[0090] This structure utilizes optical principles, is simple to construct, has a fast response time, and is easy to maintain.

[0091] It should be noted that the first sensing position 114 has a first slot 114a and four second slots 114b, all of which are connected to the movable slot 111a. The first sensing position 114 also includes a light emitter 1141, four reflectors 1142 and a light sensor 1143.

[0092] The light emitter 1141 emits light, which is the light source for the entire induction sound-absorbing guardrail 100. The light emitter 1141 can be an infrared emitter.

[0093] Four mirrors 1142 are used to reflect light and change its direction to form a specific light mesh structure (pentagram mesh structure).

[0094] The light sensor 1143 receives the light reflected by the reflector 1142 to sense the position of the foam ball 113.

[0095] The light emitter 1141 emits light from the first slot 114a. The light is reflected in sequence by four mirrors 1142, forming a first light grid in the movable slot 111a.

[0096] When external noise causes the diaphragm 112 to vibrate, the foam ball 113 moves vertically within the movable groove 111a, changing the reflection path of the optical mesh.

[0097] The position of the foam ball 113 is sensed by the light sensor 1143, and the movement of the drive component 130 is further controlled to adjust the position of the noise absorption shaft 120, thereby achieving the absorption of noise of different frequencies.

[0098] The diameter of foam ball 113 is larger than the maximum aperture of the optical mesh.

[0099] In at least one embodiment of this application, the first slot 114a and the four second slots 114b are arranged in a pentagram on the same horizontal plane.

[0100] In at least one embodiment of this application, the diaphragm 112 is disposed close to the ground, and the center of the diaphragm 112 is provided with a groove 112a that is recessed towards the ground;

[0101] In the initial state, the foam ball 113 is located within the groove 112a.

[0102] In at least one embodiment of this application, the first sensing bit 114, the second sensing bit 115, and the third sensing bit 116 have the same structure.

[0103] Please refer to Figures 1-5 In this embodiment, when external noise occurs, the diaphragm 112 near the ground begins to vibrate. The groove 112a at the center of the diaphragm 112 ensures the initial stable position of the foam ball 113 and enables the diaphragm 112 to respond more sensitively to noise vibrations.

[0104] The foam ball 113 moves, and the vibration of the diaphragm 112 drives the foam ball 113 to move vertically within the movable groove 111a.

[0105] The position of the foam ball 113 in the active slot 111a will be detected by three sensing positions (first sensing position 114, second sensing position 115 and third sensing position 116), which correspond to different noise frequencies.

[0106] The light emitter 1141 emits light, which is reflected by the four reflectors 1142 arranged in a pentagonal pattern to form the first light grid. Changing the position of the foam ball 113 will affect the reflection path of the light grid.

[0107] The light sensor 1143 receives the altered light signal and analyzes the noise frequency based on the position of the foam ball 113.

[0108] The light sensor 1143 sends a first signal to the drive unit 130 based on the analysis results. The first signal is the angle that the noise absorption shaft 120 needs to rotate.

[0109] Similarly, the second and third signals can be obtained. After receiving the signals, the driving component 130 drives the noise absorption shaft 120 to rotate, adjusting the positions of the first sound absorption area 121, the second sound absorption area 122, and the third sound absorption area 123.

[0110] After the sound-absorbing shaft rotates, the corresponding sound-absorbing areas align with external noise to achieve noise absorption at specific frequencies. For example, the first sound-absorbing area 121, the second sound-absorbing area 122, and the third sound-absorbing area 123 are used to absorb noise at different frequencies.

[0111] The sound-absorbing guardrail 100 will continuously monitor external noise and adjust the position of the sound-absorbing area according to frequency changes.

[0112] Through the real-time response of the diaphragm 112, foam ball 113 and noise sensing component 110, the sound-absorbing guardrail 100 can quickly adjust the sound-absorbing area for noise of different frequencies, ensuring continuous and effective noise control.

[0113] The sound-absorbing guardrail 100 achieves real-time, dynamic noise control through a sensitive noise sensing component 110 and an adjustable noise absorption shaft 120.

[0114] Especially suitable for urban roads, highways, industrial areas and other environments, it can automatically identify noise of different frequencies and take corresponding sound absorption measures to create a quieter living and working environment for people.

[0115] It should be noted that the five-pointed star layout ensures that the light is reflected and covers a uniform area, which helps to form a more stable light network.

[0116] The pentagram configuration integrates multiple slots, reducing the required physical space and making the structure more compact.

[0117] The diaphragm 112 is close to the ground, which helps to more sensitively sense noise from low-lying areas, such as traffic noise.

[0118] The design of the groove 112a ensures that the foam ball 113 is stably positioned on the diaphragm 112 in the initial state, reducing the risk of misoperation and external interference. The groove 112a is a circular groove formed by recessing towards the ground.

[0119] The groove 112a at the center of the diaphragm 112 allows for adjustment of the vibration range of the diaphragm 112, thus adapting to different noise environments.

[0120] The first sensing position 114, the second sensing position 115, and the third sensing position 116 have the same structure, which ensures the consistency and accuracy of sensing.

[0121] In at least one embodiment of this application, the first sound-absorbing area 121 is provided with a first sound-absorbing hole 121a;

[0122] The second sound-absorbing area 122 is provided with a second sound-absorbing hole 122a;

[0123] The third sound-absorbing area 123 is provided with a third sound-absorbing hole 123a;

[0124] The diameter of the first sound-absorbing hole 121a is denoted as a, the diameter of the second sound-absorbing hole 122a is denoted as b, and the diameter of the third sound-absorbing hole 123a is denoted as c, satisfying the relationship: a>b>c.

[0125] In at least one embodiment of this application, a plurality of protrusions 1211 are provided alternately inside the first sound-absorbing hole 121a, and the protrusions 1211 are used to absorb sound waves.

[0126] In at least one embodiment of this application, the second sound-absorbing hole 122a is arc-shaped along the axis of the noise absorption shaft 120.

[0127] In at least one embodiment of this application, the inner wall of the third sound-absorbing hole 123a is provided with an arc surface 123b that protrudes in the axial direction of the third sound-absorbing hole 123a.

[0128] Please refer to Figures 1-5 In this embodiment, the aperture of the first sound-absorbing hole 121a is denoted as a, the aperture of the second sound-absorbing hole 122a is denoted as b, and the aperture of the third sound-absorbing hole 123a is denoted as c, satisfying the relationship: a > b > c.

[0129] Sound-absorbing holes with different apertures can absorb noise at specific frequencies. The first sound-absorbing zone 121 of the large aperture (a) absorbs low-frequency noise, the second sound-absorbing zone 122 of the medium aperture (b) absorbs mid-frequency noise, and the third sound-absorbing zone 123 of the small aperture (c) absorbs high-frequency noise.

[0130] Depending on the frequency of the noise, the noise absorption shaft 120 can be rotated to adjust the position of the sound absorption area, effectively absorbing noise of a specific frequency.

[0131] It can specifically absorb noise of different frequencies, thereby improving the overall noise suppression efficiency.

[0132] This structure can automatically adjust according to the actual noise environment, so that it can maintain good performance under various environments and noise types.

[0133] The staggered raised 1211 structure increases the contact area between sound waves and the sound-absorbing material, thereby enhancing the sound absorption effect.

[0134] The raised 1211 structure helps to disperse and suppress the reflection of sound waves, thereby reducing the secondary propagation of noise.

[0135] Along the axis of the noise absorption shaft 120, the second sound-absorbing hole 122a is arc-shaped.

[0136] The arc-shaped sound-absorbing hole design helps to change the propagation path of sound waves, causing them to be reflected and refracted multiple times within the sound-absorbing area.

[0137] The sound waves undergo multiple reflections and refractions, increasing the contact time between the sound waves and the sound-absorbing material, thereby enhancing the sound absorption effect.

[0138] The inner wall of the third sound-absorbing hole 123a is provided with an arc surface 123b that protrudes in the direction of the axis of the third sound-absorbing hole 123a.

[0139] The curved 123b structure helps guide sound waves deep into the sound-absorbing holes, increasing the probability of contact between sound waves and the sound-absorbing material.

[0140] It is particularly helpful in absorbing high-frequency sound waves, making the sound absorption effect more balanced across all frequency bands.

[0141] Specific work process:

[0142] The noise sensing component 110 receives the vibration frequency of external noise.

[0143] The vibration of the diaphragm 112 drives the foam ball 113 to move vertically within the movable groove 111a.

[0144] The position of the foam ball 113 is detected by sensing devices such as optical networks to determine the frequency of external noise.

[0145] Based on the sensed noise frequency, the noise sensing component 110 controls the movement of the drive component 130.

[0146] The drive unit 130 rotates the noise absorption shaft 120 to adjust the position of the first sound absorption area 121, the second sound absorption area 122, or the third sound absorption area 123 to align with the noise of the corresponding frequency.

[0147] The first sound-absorbing area 121 has the largest aperture and is provided with multiple protrusions 1211 in an alternating pattern, which can absorb lower frequency sound waves.

[0148] The second sound-absorbing area 122 has a smaller aperture, and the arc-shaped sound-absorbing hole design helps to absorb mid-frequency sound waves.

[0149] The third sound-absorbing zone 123 has the smallest aperture and its inner wall has a protruding arc surface 123b, which can absorb high-frequency sound waves.

[0150] The three sound-absorbing zones rotate quickly to the correct position according to the noise frequency to achieve precise sound absorption.

[0151] By accurately sensing and absorbing different frequencies, efficient control of various noises is achieved.

[0152] The reinforced sound-absorbing structure design makes the sound absorption effect more significant.

[0153] The automated sensing and adjustment system enables the sound-absorbing guardrail 100 to operate intelligently, reducing labor costs.

[0154] Accordingly, a sound-absorbing guardrail 100 is provided, the sound-absorbing guardrail 100 comprising:

[0155] Guardrail body 10;

[0156] A noise sensing component 110 is disposed on the guardrail body 10;

[0157] The noise absorption shaft 120 is rotatably mounted on the guardrail body 10. The circumferential surface of the noise absorption shaft 120 is provided with a first sound absorption area 121, a second sound absorption area 122 and a third sound absorption area 123. The first sound absorption area 121, the second sound absorption area 122 and the third sound absorption area 123 are used to absorb noise of different frequencies.

[0158] A drive component 130 is disposed on the guardrail body 10, and the drive component 130 is fixedly connected to the noise absorption shaft 120;

[0159] The noise sensing component 110 is used to control the movement of the drive component 130 so that the noise absorption shaft 120 adjusts the position of the first sound absorption area 121, the second sound absorption area 122, or the third sound absorption area 123 according to different frequencies of noise.

[0160] In this embodiment, when the noise sensing component 110 receives externally emitted noise, it adjusts the rotation time of the driving component 130 according to the frequency of the noise. The driving component 130 drives the noise absorption shaft 120 to rotate. The first sound-absorbing area 121, the second sound-absorbing area 122, and the third sound-absorbing area 123 are used to absorb noise of different frequencies, so that one of the first sound-absorbing area 121, the second sound-absorbing area 122, or the third sound-absorbing area 123 is aligned with the direction of noise generation to absorb noise energy and reduce noise. By adjusting the position of the first sound-absorbing area 121, the second sound-absorbing area 122, or the third sound-absorbing area 123 according to different noise frequencies, a better sound absorption effect can be obtained, thus solving the problem of poor noise absorption due to the inability to better absorb noise of different frequencies.

[0161] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A sound-absorbing guardrail, characterized in that, The sound-absorbing guardrail includes: The main body of the guardrail; A noise sensing component is provided on the main body of the guardrail; A noise-absorbing shaft is rotatably mounted on the guardrail body. The circumferential surface of the noise-absorbing shaft is provided with a first sound-absorbing area, a second sound-absorbing area, and a third sound-absorbing area. The first sound-absorbing area, the second sound-absorbing area, and the third sound-absorbing area are used to absorb noise of different frequencies. A driving component is mounted on the guardrail body and is fixedly connected to the noise-absorbing shaft. The noise sensing component is used to control the movement of the driving component so that the noise absorption shaft adjusts the position of the first sound absorption area, the second sound absorption area, or the third sound absorption area according to different frequencies of noise. The noise sensing component includes: The sensor housing has a movable groove and an opening communicating with the movable groove, the opening communicating with the outside, and the sensor housing is disposed on the guardrail body; A diaphragm is disposed at the opening, and the diaphragm is used to receive the vibration frequency of external noise; Foam balls are placed inside the movable groove; The sensor housing is provided with a first sensing position, a second sensing position and a third sensing position in the vertical direction, and the first sensing position, the second sensing position and the third sensing position are arranged sequentially in the movable groove in the vertical direction; The diaphragm vibrates to drive the foam ball to move in the movable groove along the vertical direction. The first sensing position, the second sensing position, or the third sensing position senses the position of the foam ball to adjust the position of the first sound-absorbing area, the second sound-absorbing area, or the third sound-absorbing area. The first sensing position has a first slot and four second slots, and the first slot and the four second slots are all connected to the movable slot; The first sensing position includes: A light emitter is disposed within the first slot; Four reflectors are respectively disposed in the four second slots; A light sensor is located in the first slot; The light emitted by the light emitter is reflected by the four mirrors onto the light sensor, forming a first light grid within the movable slot; The first sensing bit, the second sensing bit, and the third sensing bit have the same structure.

2. The sound-absorbing guardrail according to claim 1, characterized in that, The first slot and the four second slots are arranged in a pentagram on the same horizontal plane.

3. The sound-absorbing guardrail according to claim 1, characterized in that, The diaphragm is positioned close to the ground, and the center of the diaphragm has a groove that is recessed towards the ground; In the initial state, the foam ball is located within the groove.

4. The sound-absorbing guardrail according to claim 1, characterized in that, The first sound-absorbing area has a first sound-absorbing hole; The second sound-absorbing area is provided with a second sound-absorbing hole; The third sound-absorbing area is provided with a third sound-absorbing hole; The diameter of the first sound-absorbing hole is denoted as a, the diameter of the second sound-absorbing hole is denoted as b, and the diameter of the third sound-absorbing hole is denoted as c, satisfying the relationship: a > b > c.

5. The sound-absorbing guardrail according to claim 4, characterized in that, The first sound-absorbing hole has multiple protrusions arranged in an alternating pattern, and the protrusions are used to absorb sound waves.

6. The sound-absorbing guardrail according to claim 4, characterized in that, Along the axis of the noise absorption shaft, the second sound-absorbing hole is arc-shaped.

7. The sound-absorbing guardrail according to claim 4, characterized in that, The inner wall of the third sound-absorbing hole is provided with an arc surface that protrudes in the direction of the axis of the third sound-absorbing hole.

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