343 results about "Sound barrier" patented technology

The invention provides a laser plasma sound barrier and magneto-rheological antiknock array collaborative protection method. The method comprises the following steps: firstly, constructing a collaborative protection structure consisting of a laser plasma sound barrier layer and a magneto-rheological antiknock array layer; a shock wave leading signal is detected in real time and input into a preset multi-dimensional feature model, the model dynamically generates a protection strategy, and a sound barrier instruction and an anti-explosion instruction are output respectively. The laser plasma sound barrier layer outputs specific reverse sound waves according to a sound barrier instruction and attenuates shock waves through destructive interference; meanwhile, the magneto-rheological anti-explosion array layer instantaneously solidifies a magnetic field according to an anti-explosion instruction, and shock wave energy is efficiently absorbed. According to the laser plasma sound barrier and magneto-rheological anti-explosion array cooperative protection method provided by the invention, the cooperative protection structure and the preset multi-dimensional feature model are constructed, so that the cooperative effect of the sound barrier and the anti-explosion array is realized, the response speed to shock waves is increased, the energy processing efficiency is improved, and the adaptability and reliability of protection are enhanced.

The invention discloses a sound barrier sound insulation characteristic evaluation method suitable for a real ship complex sound field, and belongs to the technical field of real ship sound barriers, and the method comprises the steps: arranging hydrophone arrays at acoustic mirror symmetry positions at two sides of a real ship fairing sound barrier to form an in-situ measurement pair; controlling the ship to sail at a plurality of navigational speeds, and synchronously acquiring sound pressure time domain signals on two sides; carrying out preprocessing and time-frequency analysis on the signals, and calculating sound pressure levels of a sound facing surface and a sound backing surface to obtain an in-situ sound pressure level difference; and based on the sound pressure level difference at different navigational speeds, analyzing the change rule of the sound insulation performance along with the frequency and the navigational speed, and carrying out comprehensive evaluation. In addition, by arranging a vibration sensor and a turbulence measuring device, path separation of structural sound and flow-induced noise is achieved, spatial coherence weighted average is introduced, and the accuracy and representativeness of evaluation under a complex sound field are improved. The method overcomes the limitations of laboratory test environment distortion and single working condition, and can truly and comprehensively reflect the actual sound insulation efficiency of the sound baffle in the dynamic navigation of a real ship.

The invention relates to the technical field of multi-layer material preparation, in particular to a high-light-transmittance weather-proof impact-resistant striped sound insulation board. The problem that transparency, weather resistance and sound insulation effect of a traditional stripe material are difficult to consider at the same time is solved. The light scattering and absorption center is reduced and high transparency and low haze are realized through reactive extrusion of the recycled material, combination of high-temperature adsorption activated carbon, multi-stage high vacuum and deep purification of a reactive decolorizing agent, and matching of transparent dispersion diffusion master batch and a compatilizer. The surface layer adopts the core-shell weather-resistant master batch and the secondary high-energy UV fluorosilicone curing coating for double shielding of ultraviolet and inhibition of photodegradation and yellowing; styrene-maleic anhydride damping resin is introduced into the middle layer, and uniform inclined micropores and asymmetric stripes formed by supercritical CO2 are combined, so that the medium and low frequency sound insulation index is improved; the bottom layer is repaired and guaranteed to be durable in impact resistance by virtue of a core-shell toughening agent and molecular chain extension; the defects of traditional products are overcome, and the service life requirement of sound barriers for expressways and rail transit is met.

The invention discloses a method for evaluating a subjective noise reduction effect of a photovoltaic sound barrier. The method comprises the following steps: measuring, collecting and analyzing a sound sample before noise control; establishing a sound barrier prediction model, and calculating sound barrier insertion loss; synthesizing a noise-controlled sound sample; according to the sound sample before noise control, the sound sample after noise control and the sound barrier prediction model, calculating or measuring to obtain related parameters; and calculating the reduction percentage of the annoyance degree, and evaluating the subjective noise reduction effect of the photovoltaic sound barrier. Through the steps of collecting a sound sample before noise control, establishing a sound barrier prediction model, synthesizing a sound sample after noise control and the like, the annoyance degree reduction percentage calculated based on a sound absorption coefficient and psychoacoustic parameters is obtained, subjective experiments are not needed in the whole evaluation process, time and labor are saved, operation is easy and convenient, and evaluation is rapid and accurate.

The invention provides a resonant cavity broadband sound barrier based on a double-helix acoustic black hole. The resonant cavity broadband sound barrier comprises a plurality of double-helix acoustic black hole resonant cavity broadband sound absorption structure cells and a supporting and connecting assembly. The multiple double-spiral acoustic black hole resonant cavity broadband sound absorption structure cells are connected together through the supporting and connecting assemblies, and a plate-shaped sound barrier is formed; the double-spiral acoustic black hole resonant cavity broadband sound absorption structure cell is in the shape of a hollow regular hexagon nut, the inner side face of the cell is open, and six cavities with the inner sides open are formed in the cell. Two spiral curved surface rolling plates with the same or different spiral curve parameters are arranged in each cavity; the curved surface of the spiral curved surface rolling plate is perpendicular to the upper end face and the lower end face of the double-spiral acoustic black hole resonant cavity broadband sound absorption structure cell. A plurality of protruding teeth are distributed on the inner side face and the outer side face of the spiral curved-surface rolling plate. The invention has the advantages that the broadband sound absorption characteristic is realized; certain ventilation and lighting performance is achieved, and the driving environment of an inner channel of the closed traffic sound barrier can be more comfortable.

The invention discloses an adjustable sound barrier system for noise reduction of a transformer and a noise reduction method. The adjustable sound barrier system comprises a sound barrier and an adjustable silencer, and the adjustable silencer comprises a silencing device and an electric shutter; the blades of the electric louver are opened or closed, so that the electric louver has a good sound insulation effect but is not ventilated, or can be ventilated but does not have the sound insulation effect. Through the integrated design of the sheet type silencer and the electric shutter, on the premise that the noise reduction performance is ensured, the length of the silencer is compressed to 0.6-1.2 m from the traditional length of 1.5 m or above, and the occupied area and cost are remarkably reduced; according to the difference between day and night noise limit values and the real-time oil temperature of the transformer, working modes are automatically switched, and accurate control of'preferential daytime heat dissipation and preferential night noise reduction 'is achieved; an existing oil temperature monitoring system of the transformer is used as a data source, additional sensors are not needed, and the structure and wiring are simplified; and multiple alarm logics are set, shutter faults and oil temperature abnormity are found and prompted in time, and equipment and noise safety is guaranteed.

The invention discloses a sound barrier auxiliary rapid installation tool and method, and relates to the technical field of sound barrier plate installation. Comprising a telescopic joint, a rotary hoisting head arranged at the top of the telescopic joint, telescopic rods arranged at the two ends of the telescopic joint and protection devices arranged at the two ends of the telescopic rods and used for clamping rubber strips at the ends of a sound barrier screen body or supporting the screen body, and the protection devices completely cover and protect the rubber strips. And the screen body cannot be blocked by the rubber strip and can be smoothly lowered, so that the rubber strip can be prevented from being damaged, and the screen body can be smoothly mounted.

The utility model discloses a kind of basalt fiberboard sound barriers, belong to sound barrier technical field, including concrete bottom beam, its upper fixedly arranged with the support column of array arrangement;Barrier main body, it is by several fiber baffle from top to bottom splicing and is constituted, the fiber baffle includes plate main body, its both ends are fixedly arranged with mounting clamping block;Among them, the back of the support column both sides are all opened with several groups of installation slot corresponding with mounting clamping block.The technical points are: the mounting clamping block of fiber baffle both sides is aligned with the installation slot on support column, i.

The invention discloses a sound barrier rapid installation structure, system and installation method, and relates to the technical field of sound barrier installation, and the sound barrier rapid installation structure comprises a pressing plate base and a buckle pressing plate. The pressing plate base is in a long strip shape and provided with a mounting groove extending in the length direction of the pressing plate base. An opening extending in the length direction is formed in one side of the mounting groove; the buckle pressing plate comprises a pressing plate and a buckle; two side edges in the width direction of the pressing plate are used for respectively pressing the outer side surfaces of two adjacent screen bodies; the lower side of the pressing plate is fixedly connected with a buckle extending in the length direction of the pressing plate. Blocking parts protruding inwards are arranged on one or two inner side walls, in the width direction, of the mounting groove, and matching parts protruding outwards are arranged on one or two outer side walls, in the width direction, of the buckle; and the buckle can be inserted into the mounting groove through the opening. The method has the advantages of being high in construction efficiency, few in installation materials, low in cost, free of material falling risks, free of maintenance in the later period, capable of reducing accident disputes and the like.

The invention discloses a sound barrier sealing system, a metal screen body, a transparent screen body and a sound barrier system, and relates to the technical field of sound barrier sealing, the sound barrier sealing system comprises a first sealing joint, a second sealing joint, a third sealing joint and a pressing plate, the first sealing joint is integrally formed by the metal wall face of the metal screen body, and the second sealing joint is integrally formed by the metal wall face of the transparent screen body; the edge of the top extends outwards to form a first baffle; the second sealing joint is provided with a clamping groove and a second baffle plate; the clamping groove is used for inserting and clamping the edge of the transparent screen body; the third sealing joint is provided with a clamping groove and a third baffle, the clamping groove is used for allowing the edge of the transparent screen body to be inserted and clamped, and the third baffle is used for being in lap joint with the lower surface of the other adjacent transparent screen body; the pressing plate is detachably arranged on the cross beam, and the edge of the pressing plate in the width direction is used for being in lap joint with the upper surface of the metal screen body and / or the transparent screen body. According to the invention, all nodes in the totally-enclosed sound barrier system are designed, the purpose of waterproofing gaps at all nodes is achieved, and the waterproof effect is good.

The invention provides a high-speed railway subgrade filler with noise reduction and crack resistance functions and a preparation process thereof, and particularly relates to a totally-enclosed sound barrier structure for high-speed railway noise reduction engineering, which comprises an entrance-exit hole section, a plurality of standard sections and a plurality of expansion joint sections, the access hole section and the first standard section are sequentially connected front and back, the standard sections and the expansion joint sections are arranged at intervals one by one, and one expansion joint section is arranged between every two adjacent standard sections; the totally-closed sound barrier has the advantages that the totally-closed sound barrier is divided into the access hole section, the standard section and the expansion joint section, the access hole is connected with the stand columns through the steel beams inclining inwards by 45 degrees, the ends of the arc-shaped stand columns are connected through the double-curved-surface arc-shaped steel beams, the integrity of the steel structure is improved, splicing nodes are optimized, the standard section is formed by arranging the arc-shaped steel beams at the interval of 2 m, and the expansion joint section is formed. The arc steel beams are arranged at intervals at the position of the expansion joint, the standard steel beams on the two sides of the expansion joint are designed to be of a full-cloth structure, firmness is improved, and the safe, reliable, economical and practical sound barrier design is formed.

The utility model discloses a stable type high-speed rail sound barrier relates to high-speed rail sound barrier technical field, including U-shaped track and a plurality of fixed box body, the U-shaped track is installed in advance on the two sides of high-speed rail, the fixed box body is arranged on the upper end of the U-shaped track, the upper end of the fixed box body is vertically provided with a sound barrier plate body, and the sound barrier plate body is provided with a plurality of sound barrier holes. A U-shaped track is arranged on the lower end of the fixed box body, a fixed frame is vertically mounted at the lower end of the fixed box body, the fixed frame is arranged in the U-shaped track, a mounting plate is mounted at the lower end of the side wall of the fixed box body, the mounting plate is arranged on the outer side of the U-shaped track, and a moving mechanism is arranged on the fixed box body and the fixed frame. The fixing frame is placed in the U-shaped track, then the fixed box body and the sound barrier plate body are moved through the first idler wheel, the third idler wheel and the second idler wheel, rapid splicing installation of the fixed box body and the sound barrier plate body can be achieved, and compared with a traditional bolt fixing mode, the splicing installation efficiency is high.

This invention discloses a reconstituted bamboo sound barrier and its manufacturing method, relating to the field of sound barrier technology. Specifically, it is a reconstituted bamboo sound barrier comprising spaced, inclined columns, with standard modular screen bodies fixed between the columns by clamping angle steel. The screen body uses a reconstituted bamboo main screen body as the core sound-absorbing body, combined with reconstituted bamboo panels, reconstituted bamboo cavities, reinforcing frames, and other components. The reconstituted bamboo panels have 0.3mm-1.0mm micro-perforations, forming an auxiliary sound-absorbing structure with the sealed reconstituted bamboo cavities, enhancing the sound absorption effect of the reconstituted bamboo main screen body. The diffusion texture of the reconstituted bamboo main screen body disperses reflected sound waves, improving the uniformity of the sound field, allowing more sound energy to "penetrate" into the sound-absorbing material and be consumed. The manufacturing process involves bamboo bundle pretreatment, shaping, and assembly, resulting in a product with low cost, light weight, good durability, environmental friendliness, and excellent acoustic performance, suitable for noise control on highways, railways, and other road sections.

The utility model relates to the technical field of sound barrier installation, in particular to a vertical sound barrier unit plate installation device which comprises an installation support, a cargo boom structure and a pulling rope, the installation support is installed on an H-shaped steel stand column, the cargo boom structure is installed on the installation support, and the pulling rope is installed on the installation support. A lifting hook steel pulley is arranged on the cargo boom structure, and the traction rope is guided by the lifting hook steel pulley and is connected with the sound barrier unit plate. The hoisting device has the advantages of small volume, light weight and simple structure, and mainly comprises three parts, namely the hoisting arm, the pulley block and the traction rope; the device has the characteristics of easy manual transportation, simple assembly, convenient operation, high operation efficiency, small influence on railway equipment and the like; secondly, the device can be installed by only one person, manual rope pulling hoisting is adopted, a winch does not need to be powered on, and normal operation can be achieved; in the hoisting process, workers can adjust the ascending posture of the unit plate at any time, and plate damage is avoided.

The utility model discloses a high-stability vertical sound barrier embedded part, which belongs to the technical field of sound barrier embedded parts, and adopts the technical scheme that the high-stability vertical sound barrier embedded part comprises a sound barrier embedded part body, an auxiliary stabilizing mechanism is arranged at the top of the sound barrier embedded part body, and the auxiliary stabilizing mechanism comprises a storage component and a calibration component; the storage assembly is arranged at the top of the sound barrier embedded part body, the calibration assembly is arranged in the storage assembly, and by arranging the storage assembly and the calibration assembly, a user can install the storage assembly at any corner of the sound barrier embedded part body according to actual conditions so as to receive and fix the calibration assembly; a user can combine the calibration assembly and the storage assembly, the calibration assemblies arranged at the tops of the two sound barrier embedded part bodies can mutually emit calibration light rays, at the moment, the user only needs to directly observe whether light ray drop points are located on the same level or not, calibration can be conducted, and the user can conveniently conduct installation work.

The utility model relates to the technical field of noise control, in particular to a cable-supported sound insulation barrier. The sound insulation screen comprises side sound insulation screens arranged on the two sides of a road and a bridge and further comprises a top sound insulation screen arranged above the road and the bridge, the top sound insulation screen comprises a bearing cable net, a main frame, side frames and sound insulation plates, the main frame comprises main stand columns and main beams, and the main stand columns are arranged in the middle of the road and the bridge at intervals in the longitudinal direction of the road and the bridge. The girders are fixedly arranged at the upper parts of the main upright posts along the longitudinal direction of the road bridge; the side frame comprises side stand columns and side beams, the side stand columns are fixedly arranged on the edges of a road bridge at intervals in the longitudinal direction of the road bridge, and the side beams are fixedly arranged on the tops of the side stand columns in the longitudinal direction of the road bridge. The bearing cable net comprises a plurality of main inhaul cables, the main inhaul cables roughly extend in the transverse direction of the road bridge, the two ends of each main inhaul cable are fixed to the corresponding main beam and the corresponding edge beam respectively, the main inhaul cables are arranged at intervals in the longitudinal direction of the road bridge, and the sound insulation plates are arranged on the bearing cable net. The method can be widely applied to noise control projects in the traffic and transportation fields such as highways, railways, subways and high-speed rails.

1. Name of the designed product: Road sound barrier. 2. Use of the designed product: Used for sound insulation on both sides of the road. 3. Design points of the designed product: In shape. 4. Picture or photo that best shows the design points: Perspective view.

The utility model relates to the technical field of sound barriers, and discloses a plug-in type cultural sound barrier which comprises a base, the upper surface of the base is connected with a lower barrier, the upper surface of the lower barrier is connected with a cultural plate, the upper surface of the cultural plate is connected with an upper barrier, and the upper surface of the base is connected with a supporting assembly. The lower barrier, the culture plate and the upper barrier are all located between the supporting assemblies, the upper ends of the supporting assemblies are connected with the two anti-pressing assemblies, and the other ends of the two anti-pressing assemblies are connected with the two sides of the upper end of the culture plate correspondingly. According to the plug-in culture sound barrier, the supporting assemblies are arranged on the base, the lower barriers, the culture plates and the upper barriers are arranged between the supporting assemblies, and the supporting assemblies are wrapped inside, so that when the lower barriers, the culture plates and the upper barriers are used, the lower barriers, the culture plates and the upper barriers can be spliced; therefore, the lower barrier, the culture plate and the upper barrier are prevented from being hindered by the supporting assembly while the supporting effect is not affected.

The utility model belongs to the technical field of sound barriers, and particularly relates to a composite nonmetal sound barrier unit plate. The non-metal sound barrier unit plate comprises a back plate formed by pouring concrete and a face plate made of ceramic particle sound absorption materials, the back plate and the face plate are connected through a damping deformation layer, and the face plate can float relative to the back plate in a damping mode after being impacted by a load. The sound absorption panel of the non-metal sound barrier unit plate can perform damping floating relative to the back plate, so that the non-metal sound barrier unit plate is more impact-resistant and fatigue-resistant, and has the characteristics of high structural strength, lasting vibration and noise reduction effects and long service life.

The application discloses a high-speed rail sound barrier deformation detection method and system based on three-dimensional laser scanning, comprising the following steps: scanning and acquiring sound barrier static point cloud data and real-time dynamic point cloud data of the sound barrier when a train passes through by a three-dimensional laser measurement module; comparing the static data and the dynamic data, and automatically analyzing and calculating the deformation of the sound barrier and the stand when the train passes through according to a pre-set threshold value by the control software, and automatically judging whether the state of the sound barrier and the stand is abnormal; manually reviewing the result of the automatic analysis by an operator, and generating a final detection result according to the data after the manual review; associating the detection result with the actual railway mileage by using high-precision positioning information provided by a Beidou satellite navigation system and combining railway mileage markers; finally, accurately positioning the state abnormal position to specific stands and panels, and realizing efficient and accurate non-contact automatic deformation detection of the high-speed rail sound barrier.

An acoustic blanket absorbs acoustic energy and reduces noise in a launch vehicle. The acoustic blanket may be overlaid on a wall of a payload fairing of the launch vehicle. Materials and construction of the acoustic blanket allow for a relatively thin and light sound barrier. The acoustic blanket may comprise vertically-lapped polyester that is overlaid with a lightweight melamine foam. This combination of materials creates an acoustic impedance mismatch between layers that leads to absorption of acoustic energy across a relatively broad range of frequency bands. The acoustic blanket has a particular heat seal pattern that helps absorb noise while allowing the acoustic blanket to be relatively soft and flexible, which is useful for attaching the acoustic blanket to a curved wall of a fairing or other launch vehicle shapes. The acoustic blanket utilizes micro-perforations on multiple sides to allow for movement of air / venting while maintaining the bulk materials inside.

The invention relates to the technical field of environmental acoustics, discloses a road totally-enclosed sound barrier sound field prediction method and system, belongs to the field of environmental acoustics, and has very high practicability in sound field prediction and noise pollution evaluation of public road traffic noise after a totally-enclosed sound barrier is implemented. On the basis of the acoustic propagation principle, a new prediction method is provided for a road traffic noise source and a totally-closed sound barrier, a sound field is divided into two subsystems including a barrier internal space and an external space, and equivalent acoustic models of the two subsystems and a calculation method and recommendation parameters of the noise source sound power level are given respectively. According to the method, the sound environment of the high-rise building close to the urban road can be accurately predicted and calculated, and a basis is provided for noise pollution evaluation and control. And meanwhile, the method can be matched with a national standard method or commercial acoustic software for use, and has relatively high applicability.

The invention relates to the technical field of highway operation noise treatment, in particular to an energy-saving sound barrier structure of an expressway, which comprises a main body assembly, a bearing platform, a stand column arranged at the end part of the bearing platform and sound insulation board units arranged on the inner wall of the stand column in an array, bosses are further arranged at the ends of the sound insulation board units and matched with grooves formed in the end faces of the bearing platforms, and the outer walls of the bosses are further sleeved with sealing strips; the moving assembly comprises a main rack, the main rack is arranged in a built-in cavity formed in the inner wall of the boss, the inner wall of the built-in cavity is further provided with a bimetal induction piece, the end of the bimetal induction piece is connected with a moving part, and the moving part is connected with the main rack and drives the main rack to move on the inner wall of the built-in cavity; structural positioning of the main body assembly is achieved through cooperation of the boss and the groove. A variable cavity is arranged in the sealing strip, the breathing effect is generated through thermal expansion and cold contraction of a working medium, the ice layer adhesive force is damaged in advance to form microcracks, and the difficulty of follow-up ice breaking is lowered.

The present application relates to the field of rail transportation, in particular to a full-closed sound barrier for rail transportation, comprising a first sound barrier and a second sound barrier, a first channel and a second channel are formed on both sides between the first sound barrier and the second sound barrier, and a sound-absorbing assembly is arranged in the first channel and the second channel, the sound-absorbing assembly is provided with a first sound-absorbing module and a second sound-absorbing module, and a flow path for air circulation is formed between the first sound-absorbing module and the second sound-absorbing module, air flows through the flow path formed by the first sound-absorbing module and the second sound-absorbing module, noise energy is effectively reflected, scattered and absorbed during the propagation process, thereby effectively attenuating the sound wave intensity, greatly reducing the noise level, and gradually weakening the sound wave intensity. The present application also relates to a mounting method of the full-closed sound barrier for rail transportation.

The embodiment of the utility model discloses a frame assembly and a photovoltaic sound barrier system, the frame assembly comprises at least two oppositely arranged frame body parts, each frame body part comprises a base body part and a mounting part, and at least part of each mounting part extends from the base body part in a second direction; a first installation area and a second installation area which are arranged in the first direction are formed between the frame parts, the first installation area can accommodate the sound insulation assembly, and the second installation area can accommodate the photovoltaic assembly; and the pressing and fixing piece is detachably connected to the mounting part, and a gap used for clamping the photovoltaic module is formed between the pressing and fixing piece and the mounting part. The sound insulation assembly and the photovoltaic assembly are compatible through the frame assembly, and modular integral installation is realized, so that the influence of field installation on road traffic is reduced, the field construction difficulty is reduced, and the construction efficiency is improved.

This invention provides a laser cutting machine for sound barrier processing, relating to the field of laser processing equipment technology. It includes a worktable with a cutting machine mounted on its upper surface, and a laser head connected to the cutting machine. It also includes a dust extraction mechanism, comprising a mounting sleeve fixedly fitted onto the outer wall of the laser head. A hydraulic cylinder is connected to the side wall of the mounting sleeve. Two sets of mounting rings are provided on the side walls of the mounting sleeve. A connecting tube is slidably connected within each set of mounting rings. A magnetic ball is rotatably connected to the bottom of the connecting tube, and the magnetic ball abuts against the upper surface of the worktable. A sliding sleeve is slidably connected within the connecting tube. A straight rod is fixedly connected to the center of the sliding sleeve. A swing rod is hinged to the lower end of the straight rod, and a magnetic chuck is hinged to the other end of the swing rod. The magnetic chuck and the magnetic ball attract each other with opposite poles. This cutting machine, through its dust extraction mechanism, achieves efficient coordination between cutting operations and dust collection.

The utility model discloses an anti-shearing type high-speed rail sound barrier, which relates to the technical field of rail transit noise reduction and comprises a base, side seat plates are fixedly connected to the lower ends of two sides of the base, a plurality of mounting holes are formed in the side seat plates, a mounting groove is formed in the middle of the base, a sound insulation plate is inserted into the mounting groove, and the sound insulation plate is arranged in the mounting groove. A plurality of lock holes are formed in the lower end of the sound insulation plate, and a locking assembly used for locking the sound insulation plate is arranged in the base. The strength of the root of the sound insulation plate can be effectively improved through the reinforcing plate, the inverted-T-shaped inserting block and the shear-resistant assembly, the problem that the root of the sound insulation plate is broken when the sound insulation plate is subjected to wind is solved, meanwhile, the sound insulation plate can be conveniently connected through the locking assembly, the sound insulation plate can be conveniently and rapidly installed, and the sound insulation plate is convenient to use. And meanwhile, the sound insulation plate can be conveniently replaced after being damaged, and use is flexible and convenient.

The invention relates to a railway line side airwave active noise reduction system which comprises a multi-mode sensing module, a control module and an execution module which are deployed on two transverse sides of a noise reduction area line. The multi-mode sensing module comprises a microphone array and a laser velocimeter and is used for collecting noise signals and train speed signals and sending the noise signals and the train speed signals to the control module. The control module receives the noise signal and the train speed signal, obtains a self-adaptive anti-phase sound wave signal through calculation processing, converts the self-adaptive anti-phase sound wave signal into driving information and sends the driving information to the execution module; the execution module comprises airwave generating devices which are arranged in an array mode, and after the driving information is received, airwaves are sent out according to the power indication of the driving information. According to the invention, air waves with the same frequency and opposite phase as train noise are actively emitted, opposite consumption of low-frequency noise energy is realized, the problem that a traditional sound barrier is poor in low-frequency noise reduction effect is solved, frequency tracking and adjustment are realized, and accurate matching of opposite-phase sound waves and noise frequencies is ensured.

The invention discloses a high-speed rail sound screen wall self-repairing nano coating and a preparation method thereof, and belongs to the technical field of coatings, sodium alginate is crosslinked with calcium ions in calcium chloride, gel microspheres are formed on the surface of porous shell powder, a self-repairing agent is wrapped in the gel microspheres, barium nitride is hydrated to form barium hydroxide under the excitation action of water, and the self-repairing nano coating is formed. Barium hydroxide belongs to an alkaline compound, and through the wrapping effect of the microcapsule, the corrosion effect on a modified binder in a system can be reduced, so that the material has the advantages of light weight, sound insulation, good acid and alkali resistance, washing resistance and compressive strength; polyvinyl alcohol is used as a bridge, hydroxyl of polyvinyl alcohol is combined with carboxyl of carboxymethyl chitosan and then copolymerized with vinyl acetate to form a three-dimensional network structure, cohesive force of the adhesive and adhesive force to a base material are greatly improved, calcium ions are separated out due to the alkaline effect of barium hydroxide, and meanwhile the crosslinking strength of the adhesive can be improved; the bonding strength is further improved.

The utility model relates to the technical field of sound barriers, and provides a sound insulation assembly of a detachable sound barrier, which comprises a mounting base, support plates are fixed on two sides of the top end of the mounting base, an assembling mechanism is fixed on the top end of each support plate, sound absorption structures are fixed on the outer walls of two sides of each assembling mechanism, and the sound absorption structures are fixed on the outer walls of two sides of each assembling mechanism. The sound absorption structure comprises bonding layers fixed to the outer walls of the two sides of the assembling mechanism, sound absorption plates are fixed to the outer walls of the bonding layers, and sound absorption strips are evenly fixed to the outer walls of the sound absorption plates. The sound absorption structure is arranged, under the sound absorption effect of the sound absorption plate, sound can be preprocessed when reaching the sound insulation structure, the sound insulation efficiency is improved, under the effect that the sound absorption strips are evenly distributed, the sound can be scattered, the energy of the noise is dispersed, and the sound insulation effect is improved. The sound insulation assembly of the detachable sound barrier has the functions of conveniently absorbing sound and scattering sound waves, and the working efficiency of the sound insulation assembly of the detachable sound barrier in use is improved.