CN114295200B - Vibration noise simulation, propagation, separation and protection integrated evaluation system - Google Patents
Vibration noise simulation, propagation, separation and protection integrated evaluation system Download PDFInfo
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- CN114295200B CN114295200B CN202111665851.4A CN202111665851A CN114295200B CN 114295200 B CN114295200 B CN 114295200B CN 202111665851 A CN202111665851 A CN 202111665851A CN 114295200 B CN114295200 B CN 114295200B
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Abstract
The invention discloses a vibration noise simulation, propagation, obstruction and protection integrated evaluation system, and belongs to the technical field of noise prevention and control. The system comprises a vibration noise simulation unit, a noise source detection unit and a noise source control unit, wherein the vibration noise simulation unit is used for simulating vibration noise sources with different characteristics; the propagation attenuation evaluation unit is arranged on the noise propagation path and used for simulating different microclimate parameters and measuring the propagation attenuation rule of the noise; the blocking noise reduction evaluation unit is arranged on the noise propagation path and used for simulating different blocking noise reduction environments and measuring the blocking effects of the different blocking noise reduction environments on noise; and the individual protection evaluation unit is arranged on the noise propagation path and is used for measuring the blocking effect of different individual protection articles on the noise in the human ear. The invention can realize the simulation of different vibration noise sources, and purposefully develop a series of anti-noise/noise reduction bases and application researches to explore the noise propagation attenuation rule, obtain the optimal separation scheme of different characteristic noises and scientifically guide the reasonable selection of individual anti-noise articles.
Description
Technical Field
The invention belongs to the technical field of noise prevention and control, and particularly relates to a vibration noise simulation, propagation, obstruction and protection integrated evaluation system.
Background
At present, the analysis of noise sources and noise reduction measures are firstly based on-site noise source measurement and recording or finite element simulation, which undoubtedly brings two disadvantages, namely, a large amount of fussy early-stage preparation work is unreasonable waste of resources for scientific research personnel; secondly, the repeatability is high, the referential is not strong, the characteristic analysis for different noises is simplified, and the effect of corresponding noise reduction measures is not ideal, but the advantage is also obvious, namely, a quantized reference base number (including the spectrum characteristics of different noise sources) can be provided for other scientific researchers.
Therefore, in view of the above problems, a scheme capable of developing a series of noise prevention/reduction bases and application researches such as a propagation attenuation rule of noise in air with different microclimate parameters, noise insulation/absorption effects of different noise-blocking wall arrangement schemes, noise protection performance of different noise protection products and the like is lacked, so as to explore the noise propagation attenuation rule, obtain an optimal insulation scheme of noise with different characteristics and scientifically guide reasonable selection of individual noise prevention products.
Disclosure of Invention
In order to solve at least one of the above technical problems, according to an aspect of the present invention, there is provided a vibration noise simulation, propagation, blocking and protection integrated evaluation system, including:
the vibration noise simulation unit is used for simulating vibration noise sources with different frequency spectrums and different sound pressure level distribution characteristics;
the propagation attenuation evaluation unit is arranged on the noise propagation path and used for simulating different microclimate parameters and measuring the propagation attenuation rule of the noise;
the noise rejection evaluation unit is arranged on the noise propagation path and used for simulating different noise rejection environments and measuring the noise rejection effects of the different noise rejection environments;
and the individual protection evaluation unit is arranged on the noise propagation path and is used for measuring the blocking effect of different individual protection articles on the noise in the human ear.
According to the vibration noise simulation, propagation, blocking and protection integrated evaluation system of the embodiment of the present invention, optionally, the vibration noise simulation unit includes:
the interaction module is used for inputting noise parameters to be simulated;
the parameter conversion module is in signal connection with the interaction module, is internally provided with an amplitude vibration frequency and sound pressure level frequency spectrum relation curve and converts input noise parameters into vibration parameters;
the electric signal transmission module is in signal connection with the parameter conversion module and is used for transmitting the vibration parameters converted by the parameter conversion module;
the remote sensing shaft control machine is in signal connection with the electric signal transmission module, receives the vibration parameters transmitted by the electric signal transmission module and converts the vibration parameters into mechanical signals;
the resonance rod is in transmission connection with the remote sensing shaft control machine, the middle part of the resonance rod is in rotary connection with the fixed joint, the resonance rod performs vibration corresponding to vibration frequency and amplitude around the fixed joint after receiving a mechanical signal transmitted by the remote sensing shaft control machine, and the resonance rod is arranged in the box body;
and the output power amplifier module is arranged at an opening of the box body and is used for outputting vibration noise generated by the resonance rod.
According to the vibration noise simulation, transmission, obstruction and protection integrated evaluation system provided by the embodiment of the invention, optionally, 13 resonance rods are provided.
According to the vibration noise simulation, propagation, blocking and protection integrated evaluation system of the embodiment of the present invention, optionally, the propagation attenuation evaluation unit includes:
the microenvironment regulating and controlling room is used for simulating noise propagation microenvironments with different temperature, humidity, wind speed and air pressure parameters;
the sound pressure signal sensing device I is used for monitoring sound pressure changes of different spatial positions in the process of noise transmission inside and outside a microenvironment;
and the first noise detection and analysis device is used for summarizing and analyzing the sound pressure signal obtained by the first sound pressure signal sensing device and outputting a spectrum sound pressure level spatial distribution cloud picture.
According to the vibration noise simulation, propagation, blocking and protection integrated evaluation system of the embodiment of the invention, optionally, the microenvironment regulation room comprises:
a sound insulation room which is a hollow hexahedral structure made of porous sound absorption material;
the air supply mechanism is communicated with the sound insulation room and is used for supplying air into the sound insulation room;
the pressure extraction fan is connected with the air supply mechanism and is used for controlling the air pressure and the air speed conveyed by the air supply mechanism;
the temperature and humidity regulating module is connected with the air supply mechanism and is used for controlling the temperature and the humidity transmitted by the air supply mechanism;
the environmental parameter monitoring mechanism is arranged in the sound insulation room and is used for monitoring the air pressure, the air speed, the temperature and the humidity of the environment in the sound insulation room;
the servo control mechanism is arranged outside the sound insulation room and is in signal connection with the air supply mechanism, the pressure extraction fan, the temperature and humidity regulation and control module and the environmental parameter monitoring mechanism, and the servo control mechanism is used for inputting and controlling air pressure, air speed, temperature and humidity in the sound insulation room.
According to the vibration noise simulation, propagation, blocking and protection integrated evaluation system of the embodiment of the invention, optionally, the air supply mechanism comprises:
a main pipeline;
six branch pipelines are arranged, and one end of each branch pipeline is communicated with the main pipeline;
six electromagnetic valves are arranged on each branch pipeline respectively;
flow equalizing cover, it has six, and flow equalizing cover's one end and the other end intercommunication that corresponds the lateral conduit, flow equalizing cover's other end border and the terminal surface border sealing connection in room that gives sound insulation, every flow equalizing cover corresponds a terminal surface of connecting the room that gives sound insulation.
According to the vibration noise simulation, propagation, blocking and protection integrated evaluation system of the embodiment of the present invention, optionally, the blocking and noise reduction evaluation unit includes:
the sound resisting/absorbing device is made of sound resisting/absorbing materials and used for simulating different sound resisting/absorbing scenes;
the sound pressure signal sensing device II is used for monitoring the sound pressure change inside and outside the sound resistance/absorption device;
and the second noise detection and analysis device is used for summarizing and analyzing the sound pressure signals obtained by the second sound pressure signal sensing device and comparing and displaying the sound pressure level change of the internal and external frequency spectrums of the sound resistance/absorption device.
According to the vibration noise simulation, propagation, obstruction and protection integrated evaluation system of the embodiment of the invention, optionally, the individual protection evaluation unit comprises:
a beam bracket horizontally arranged;
the fixed support is fixedly connected below the two ends of the cross beam support;
the base is horizontally fixed at the bottom of the fixed support;
the simulated human ears are made of flexible silica gel materials and are formed according to the size of the human ears, and the number of the simulated human ears is two, and the two simulated human ears are arranged on the two sides of the fixed support;
the individual noise-proof article is detachably worn on the simulated human ear;
the sound pressure signal sensing device III is arranged in the simulated human ear and is used for monitoring the sound pressure change inside and outside the simulated human ear;
and the third noise detection and analysis device is used for summarizing and analyzing the sound pressure signals obtained by the third sound pressure signal sensing device and comparing and displaying the sound pressure level changes of the inside and outside frequency spectrums of the simulated human ears.
According to the vibration noise simulation, propagation, blocking and protection integrated evaluation system of the embodiment of the present invention, optionally, the individual protection evaluation unit further includes:
the top cover is movably connected to the top of the cross beam support, and the height of the top cover in the vertical direction is adjustable, so that the top cover is used for supporting individual noise-proof articles.
According to the vibration noise simulation, propagation, blocking and protection integrated evaluation system provided by the embodiment of the invention, optionally, the propagation attenuation evaluation unit, the blocking and noise reduction evaluation unit and the individual protection evaluation unit can be used independently or jointly.
Advantageous effects
Compared with the prior art, the invention has at least the following beneficial effects:
(1) the vibration noise simulation, propagation, obstruction and protection integrated evaluation system can realize the simulation of vibration noise sources with different frequency spectrums and sound pressure level distribution characteristics, and purposefully develop a series of anti-noise/noise reduction bases and application researches such as the propagation attenuation rules of noise in air with different microclimate parameters, the resistance/absorption effects of different noise-resistant wall arrangement schemes on the noise, the protection performance of different noise protection articles on the noise and the like so as to explore the noise propagation attenuation rules, obtain the optimized obstruction schemes of different characteristic noises and scientifically guide the reasonable selection of individual anti-noise articles, has positive promotion significance for the basic research and application technology development of industrial noise prevention and control, and can provide important reference and reference for occupational health noise protection;
(2) according to the vibration noise simulation, propagation, blocking and protection integrated evaluation system, the vibration noise simulation unit can simulate a specific noise source of a main noise place, and compared with the disadvantage that the conventional noise related experiment is based on an actual field noise source, the vibration noise simulation unit provided by the invention ensures the saving of time and space resources, and can provide a system platform for the related noise experiment, the propagation attenuation evaluation mechanism, the blocking and noise reduction evaluation mechanism and the individual protection evaluation mechanism;
(3) according to the vibration noise simulation, propagation, blocking and protection integrated evaluation system, the propagation attenuation evaluation unit can simulate microenvironments with different parameters, can ensure the uniformity of air pressure, air speed, temperature and humidity parameters in the microenvironments, can adapt to the requirements of different propagation attenuation evaluation environments, and can ensure the accuracy of the propagation attenuation evaluation result;
(4) according to the vibration noise simulation, transmission, isolation and protection integrated evaluation system, the isolation and noise reduction evaluation unit can construct an isolation and noise reduction scene according to test requirements, and can also directly isolate noise on the periphery of the vibration noise simulator, so that the problem of large-scale noise equipment can be solved;
(5) according to the vibration noise simulation, transmission, obstruction and protection integrated evaluation system, the individual protection evaluation unit simulates the structure of the human ear and is matched with different individual noise-proof articles for evaluation, so that the problem of an experimental object can be solved;
(6) according to the vibration noise simulation, propagation, obstruction and protection integrated evaluation system, the propagation attenuation evaluation unit, the obstruction and noise reduction evaluation unit and the individual protection evaluation unit can be used independently or jointly according to experiment requirements, and the application range is wide.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly described below, and it is apparent that the drawings in the following description only relate to some embodiments of the present invention and are not limiting on the present invention.
FIG. 1 shows a schematic diagram of a vibration noise simulation unit of the present invention;
FIG. 2 illustrates a schematic diagram of the internal structure of the vibration noise simulation one-man case of the present invention;
FIG. 3 shows a flow chart of microenvironment parameter regulation of the propagation attenuation evaluation unit of the present invention;
FIG. 4 shows a schematic view of the air delivery mechanism of the present invention;
FIG. 5 is a view showing a structure of a sound blocking/absorbing wall according to an embodiment of the present invention;
FIG. 6 shows a schematic diagram of an individual protection evaluation unit of the present invention;
FIG. 7 is a view showing an internal structure of a dummy ear model of the present invention;
fig. 8 shows a control circuit diagram of the acoustic pressure signal sensing apparatus;
FIG. 9 shows a spectral sound pressure level spatial spread cloud of the propagation attenuation estimation unit;
FIG. 10 is a graph showing the change of the sound pressure level of the internal and external spectrum of the sound-blocking/absorbing wall of the blocking noise reduction evaluation unit;
FIG. 11 shows a graph of simulated binaural inside and outside spectrum changes for the individual protection evaluation unit;
FIG. 12 illustrates a flow chart of system use of the present invention;
reference numerals are as follows:
1. a vibration noise simulation unit; 10. an interaction module; 11. a parameter conversion module; 12. an electrical signal transmission module; 13. remote sensing axis control machine; 14. a resonant rod; 15. a fixed joint; 16. an output power amplifier module; 100. a box body;
2. a propagation attenuation evaluation unit; 20. a branch line; 21. an electromagnetic valve; 22. a flow equalizing cover;
3. a blocking noise reduction evaluation unit; 30. a first fiber cement layer; 31. a first soundproof felt; 32. a second fiber cement layer; 33. silencing cotton; 34. fixing the steel rib; 35. a third fiber cement layer; 36. a second deadening felt; 37. a layer of wedge material;
4. an individual protection evaluation unit; 40. a beam support; 41. fixing a bracket; 42. a base; 43. simulating human ears; 430. the external auditory meatus layer; 431. an inner ear canal layer; 44. a wiring port; 45. a top cover; 46. an individual noise-proof article.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "a," "an," "two," and similar referents in the description and claims of this patent application does not indicate any order, quantity, or importance, but rather is used to distinguish one element from another. Likewise, "a" and "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one.
Example 1
The vibration noise simulation, propagation, blocking and protection integrated evaluation system of the embodiment comprises:
a vibration noise simulation unit 1 for simulating vibration noise sources of different frequency spectra and different sound pressure level distribution characteristics;
the propagation attenuation evaluation unit 2 is arranged on the noise propagation path and used for simulating different microclimate parameters and measuring the propagation attenuation rule of the noise;
the noise rejection evaluation unit 3 is arranged on the noise propagation path and used for simulating different noise rejection environments and measuring the noise rejection effects of the different noise rejection environments;
and the individual protection evaluation unit 4 is arranged on the noise propagation path and is used for measuring the blocking effect of different individual protection articles on the noise in the human ear.
In the vibration noise simulation, propagation, blocking and protection integrated evaluation system of the embodiment, a vibration noise simulation unit 1 generates a vibration noise source with a frequency spectrum and sound pressure level distribution characteristic required to be simulated by inputting a specific vibration frequency and amplitude; the propagation attenuation evaluation unit 2 researches the propagation attenuation rule of the vibration noise in the corresponding environment by simulating the microenvironment with different environmental characteristic parameters such as temperature, humidity, wind speed and air pressure; the blocking and noise-reducing evaluation unit 3 sets a single-stage or multi-stage blocking/sound-absorbing device constructed by blocking/sound-absorbing materials with different structures, scales and materials at different distances from a sound source on a noise propagation path, so as to explore the blocking effect of different blocking and noise-reducing environments on noise, and obtain an optimized blocking scheme aiming at different characteristic noises; the individual protection evaluation unit 4 evaluates the protection performance of different protection articles on different vibration noises by constructing a simulation binaural model to wear different individual protection articles, and further scientifically guides the reasonable selection of individual noise-proof articles.
The vibration noise simulation, propagation, obstruction and protection integrated evaluation system can realize the simulation of vibration noise sources with different frequency spectrums and sound pressure level distribution characteristics, and purposefully develop a series of anti-noise/noise reduction bases and application researches such as the propagation attenuation rules of noise in different microclimate parameters, the resistance/absorption effects of different noise-resistant wall arrangement schemes on noise, the protection performance of different noise protection articles on noise and the like, so as to explore the noise propagation attenuation rules, obtain the optimized obstruction schemes of different characteristic noises and scientifically guide the reasonable selection of individual anti-noise articles, has positive promotion significance for the base research and application technology development of industrial noise prevention and control, and can provide important reference and reference for occupational health noise protection.
Example 2
The vibration noise simulation, propagation, blocking and protection integrated evaluation system of the present embodiment is further improved on the basis of embodiment 1, and the vibration noise simulation unit 1 includes:
an interaction module 10 for inputting noise parameters to be simulated;
the parameter conversion module 11 is in signal connection with the interaction module 10, and an amplitude vibration frequency and sound pressure level frequency spectrum relation curve is arranged in the parameter conversion module 11 to convert the input noise parameters into vibration parameters;
the electric signal transmission module 12 is in signal connection with the parameter conversion module 11 and is used for transmitting the vibration parameters converted by the parameter conversion module 11;
the remote sensing shaft control machine 13 is in signal connection with the electric signal transmission module 12, receives the vibration parameters transmitted by the electric signal transmission module 12 and converts the vibration parameters into mechanical signals;
the resonance rod 14 is in transmission connection with the remote sensing axis control machine 13, the middle of the resonance rod 14 is in rotation connection with the fixed joint 15, the resonance rod 14 receives mechanical signals transmitted by the remote sensing axis control machine 13 and then vibrates around the fixed joint 15 according to vibration frequency and amplitude, and the resonance rod 14 is arranged in the box body 100;
and the output power amplifier module 16 is arranged at an opening of the box body 100 and is used for outputting vibration noise generated by the resonant rod 14.
As shown in fig. 1 and fig. 2, a noise parameter to be simulated may be input into the interaction module 10 of this embodiment, and then the input noise parameter is converted into a vibration parameter through the parameter conversion module 11 based on a relationship curve between an amplitude vibration frequency and a sound pressure level frequency spectrum built in the interaction module, the vibration parameter is transmitted to the remote sensing axis controller 4 in the form of an electrical signal, the remote sensing axis controller 4 receives the electrical signal of the vibration parameter and converts the electrical signal into a mechanical signal to be transmitted to the resonance rod 14, the resonance rod 14 receives the mechanical signal and vibrates around the fixed joint 15 at a corresponding vibration frequency and amplitude, so as to generate a vibration noise of a required sound pressure level frequency spectrum, and the generated vibration noise is output through the output power amplifier module 16, thereby completing the simulation of the noise.
Further, in this embodiment, 13 resonant rods 14 are provided, the oscillation frequency and the amplitude of each resonant rod 14 are independently adjustable, and the purpose of designing 13 resonant rods 14 in this embodiment is that each resonant rod 14 is controlled by the remote sensing axis control machine 4 to generate 13 different oscillation frequencies, and the noise of various requirements can be simulated by 13 different representative basic oscillation frequencies, so that various noise sources meeting the current noise experiment requirements can be simulated by the 13 resonant rods 14 in this embodiment under the control of the remote sensing axis control machine 4.
Example 3
The vibration noise simulation, propagation, blocking and protection integrated evaluation system of the embodiment is further improved on the basis of embodiments 1 and 2, and the propagation attenuation evaluation unit 2 includes:
the microenvironment regulating and controlling room is used for simulating noise propagation microenvironments with different temperature, humidity, wind speed and air pressure parameters;
the sound pressure signal sensing device I is used for monitoring sound pressure changes of different spatial positions in the process of noise transmission inside and outside a microenvironment;
and the first noise detection and analysis device is used for summarizing and analyzing the sound pressure signal obtained by the first sound pressure signal sensing device and outputting a spectrum sound pressure level spatial distribution cloud picture.
Further, the microenvironment regulated chamber comprises:
a sound insulation room which is a hollow hexahedral structure made of porous sound absorption material;
the air supply mechanism is communicated with the sound insulation room and is used for supplying air into the sound insulation room;
the pressure extraction fan is connected with the air supply mechanism and is used for controlling the air pressure and the air speed conveyed by the air supply mechanism;
the temperature and humidity regulating and controlling module is connected with the air supply mechanism and is used for controlling the temperature and the humidity conveyed by the air supply mechanism;
the environmental parameter monitoring mechanism is arranged in the sound insulation room and used for monitoring the air pressure, the air speed, the temperature and the humidity of the environment in the sound insulation room;
the servo control mechanism is arranged outside the sound insulation room and is in signal connection with the air supply mechanism, the pressure extraction fan, the temperature and humidity regulation and control module and the environmental parameter monitoring mechanism, and the servo control mechanism is used for inputting and controlling air pressure, air speed, temperature and humidity in the sound insulation room.
In this embodiment, the sound insulation room comprises the strong sound absorbing material of high porosity, can effectively avoid the reflection stack of sound wave, can allow external air current to let in simultaneously, allows the air current of air supply mechanism to send into promptly.
The servo control mechanism is arranged outside the sound insulation room and comprises a microclimate parameter display module, a to-be-simulated parameter input module and a servo control module, air pressure, air speed, temperature and humidity parameters needing to be adjusted can be input through the to-be-simulated parameter input module, and then the servo control module is used for controlling the air supply mechanism, the pressure suction fan and the temperature and humidity regulation and control module.
The environmental parameter monitoring mechanism of this embodiment includes a plurality of temperature sensor, humidity transducer, air velocity transducer and baroceptor, and the sensor is evenly arranged in syllable-dividing roof portion, bottom and middle part, and atmospheric pressure, wind speed, temperature and humidity parameter in the real-time supervision syllable-dividing room to feed back the monitoring result to serving accuse mechanism, serving the microclimate parameter display module screen interface display of accuse mechanism, as shown in fig. 3.
Further, the air supply mechanism includes:
a main pipeline;
six branch lines 20, one end of each branch line 20 being communicated with the main line;
six electromagnetic valves 21 provided in each of the branch lines 20;
flow equalizing cover 22, it has six, and flow equalizing cover 22's one end and the other end intercommunication that corresponds lateral line 20, flow equalizing cover 22's other end border and the terminal surface border sealing connection in room that gives sound insulation, every flow equalizing cover 22 corresponds a terminal surface of connecting the room that gives sound insulation.
In this embodiment, the main pipeline is hermetically connected in series with the pressure-extraction fan and the temperature and humidity control module, one end of each of the six branch pipelines 20 is communicated with the main pipeline, the other end of each of the six branch pipelines is communicated with one end of each of the flow-equalizing covers 22, each of the branch pipelines 20 is as shown in fig. 4, the solenoid valve 21 is arranged on each of the branch pipelines 20, the solenoid valve 21 is controlled by the control mechanism, and further the gas flow of each of the branch pipelines 20 is adjusted, in this embodiment, the six flow-equalizing covers 22 are respectively hermetically connected with six end faces of the sound-insulating room, more specifically, the six flow-equalizing covers are hermetically connected with the outer end face of the sound-insulating room, and since the sound-insulating room is made of a high-porosity material, the gas flow can pass through the wall face of the sound-insulating room and enter the room.
The air current of this embodiment lateral 20 flows equally through the cover 22 that flow equalizes, can be along in the room that gives sound insulation of each terminal surface uniform flow entering of room that gives sound insulation to carry out the air current through each side of the room that gives sound insulation and carry, and the air current of six lateral 20 all comes from same main line, guarantees the homogeneity of the parameter of the microenvironment that produces in the room that gives sound insulation from this, ensures the validity of microenvironment simulation, ensures the accuracy of propagation decay evaluation result.
In this embodiment, the first sound pressure signal sensing devices are arranged inside and outside the sound insulation room, and a plurality of first sound pressure signal sensing devices are arranged at corresponding spatial nodes to monitor sound pressure changes at different spatial positions.
Example 4
The vibration noise simulation, propagation, separation and protection integrated evaluation system of this embodiment is further improved on the basis of embodiments 1-3, and the separation noise reduction evaluation unit 3 includes:
the sound blocking/absorbing device is composed of sound blocking/absorbing materials and used for simulating different sound blocking/absorbing scenes;
the sound pressure signal sensing device II is used for monitoring the sound pressure change inside and outside the sound resistance/absorption device;
and the second noise detection and analysis device is used for summarizing and analyzing the sound pressure signals obtained by the second sound pressure signal sensing device and contrastingly displaying the sound pressure level change of the internal and external frequency spectrums of the resistance/sound absorption device.
In this embodiment, the main body of the sound blocking/absorbing device is a sound blocking/absorbing wall, which is constructed by sound blocking/absorbing materials with different structures, dimensions and materials, and is specifically selected according to the requirements of a sound blocking/absorbing scene to be simulated; at different distances from a noise source, the sound blocking/absorbing device can be set in the forms of a three-dimensional trap structure or a spherical trap structure of a sound blocking/absorbing wall on six sides, square barriers, circular barriers and the like on the periphery, straight barriers with equal length on a single side, two sides and three sides, circular barriers and the like, and is specifically set according to the requirements of a sound blocking/absorbing scene to be simulated; the sound barrier/absorption wall can be one or more, namely, a single-stage or multi-stage barrier can be formed.
The second sound pressure signal sensing device is arranged on the inner side and the outer side of the sound resisting/absorbing device so as to monitor the sound pressure change inside and outside the sound resisting/absorbing device.
As shown in fig. 5, this embodiment shows a structural form of the sound-blocking/absorbing wall, which is sequentially composed of a first fiber cement layer 30, a first soundproof felt 31, a second fiber cement layer 32, a mute sound-deadening cotton 33, a fixing steel rib 34, a third fiber cement layer 35, a second soundproof felt 36 and a wedge material layer 37; the fiber cement layer can be made of mineral fiber cement, calcium silicate fiber cement and the like, the sound-proof felt can be made of EVA (ethylene-vinyl acetate copolymer) + PVC (polyvinyl chloride) composite rubber, composite flexible silica gel and the like, the mute sound-deadening cotton 33 can be made of polyester fiber, PU foam, PVC (polyvinyl chloride), polyurethane foam and the like, the fixing steel rib 34 can be made of continuous hot-dip steel plates, novel titanium alloy and the like, and wedge materials PU foam, wood tools, glass wool and the like can be adopted.
Example 5
The vibration noise simulation, propagation, blocking and protection integrated evaluation system of the embodiment is further improved on the basis of the embodiments 1-4, and the individual protection evaluation unit 4 comprises:
a beam bracket 40 disposed horizontally;
a fixed bracket 41 fixedly connected below both ends of the beam bracket 40;
a base 42 horizontally fixed to the bottom of the fixing bracket 41;
the simulated human ears 43 are made of flexible silica gel materials and are formed according to the sizes of the human ears, and the number of the simulated human ears 43 is two, and the two simulated human ears are arranged on the two sides of the fixed support 41;
an individual noise-proof article 46 which is detachably worn on the simulated human ear 43;
a third sound pressure signal sensing device which is arranged in the simulated human ear 43 and is used for monitoring the sound pressure change inside and outside the simulated human ear 43;
and the third noise detection and analysis device is used for summarizing and analyzing the sound pressure signals obtained by the third sound pressure signal sensing device, and comparing and displaying the sound pressure level changes of the internal and external frequency spectrums of the simulated human ear 43.
As shown in fig. 6, the beam support 40, the fixing support 41 and the base 42 of the present embodiment form a support structure, a pair of simulated ears 43 is provided, the simulated ears are made of flexible silica gel materials through 3D printing, ear types and ear canal sizes of the simulated ears 43 are obtained through three-dimensional scanning of real person data, statistical analysis and mathematical modeling, the simulated ears 43 can be used for replacing the ears of a real person to sample and monitor the sound pressure inside the ear canal, the two simulated ears 43 are respectively arranged on two sides of the fixing support 41, and the distance is matched with the distance between the ears of the real person.
Further, the inner structure of the artificial human ear 43 of the present embodiment is as shown in fig. 7, a third sound pressure signal sensing device is disposed between the outer ear canal layer 430 and the inner ear canal layer 431, an ear-plugging type individual noise-proof article is worn in the ear canal of the outer ear canal layer 430 in the present embodiment, a wiring port is disposed at a position corresponding to the artificial human ear 43 inside the fixing bracket 41 in the present embodiment, the wiring port is a Cube port line and is used for being connected with the third sound pressure signal sensing device to transmit noise electroacoustic data, and finally, a noise analysis cloud picture is displayed by the noise detection and analysis device through three screens.
Further, the individual protection evaluation unit 4 further includes:
and the top cover 45 is movably connected to the top of the cross beam bracket 40, and the height of the top cover 45 in the vertical direction is adjustable and is used for supporting the individual noise-proof articles 46.
To individual noise-control articles for use 46 of non-earplug formula, need support when wearing, this embodiment has set up height-adjustable's top cap 45 structure, to the individual noise-control articles for use 46 of different grade type, effectively supports through height-adjusting.
Example 6
The vibration noise simulation, propagation, blocking and protection integrated evaluation system is further improved on the basis of the embodiments 1-5, and the propagation attenuation evaluation unit 2, the blocking and noise reduction evaluation unit 3 and the individual protection evaluation unit 4 can be used independently or jointly.
During actual use, each evaluation unit can be started independently or jointly according to different evaluation requirements; when the single sound pressure signal sensor is singly started, the noise detection and analysis device and the single sound pressure signal sensor work together to screen and display the noise attenuation condition under the action of the single evaluation unit; when the system is jointly started, the noise detection and analysis device and the two or three sound pressure signal sensing devices work together to screen and display the noise attenuation condition under the joint action of the two or three mechanisms, and the use flow of the vibration noise simulation, propagation, obstruction and protection integrated evaluation system is shown in fig. 12.
Further, the sound pressure signal sensing device and the noise detection and analysis device can be respectively suitable for a propagation attenuation evaluation unit, a blocking noise reduction evaluation unit and an individual protection evaluation unit; the sound pressure signal sensing device comprises a plurality of sound pressure signal sensors, when the sound pressure signal sensing device is applied to different evaluation purposes, the arrangement number and the installation positions of the sound pressure signal sensors are different, and a control circuit of the sound pressure signal sensors is shown in fig. 8; the noise detection and analysis device is used for receiving, summarizing, analyzing and processing the sound pressure signals into frequency spectrum sound pressure levels, and outputting and displaying the frequency spectrum sound pressure levels of the sound pressure signal sensing devices at different positions.
Further, fig. 9 shows a spectrum sound pressure level spatial distribution cloud chart when the vibration noise simulation, propagation, blocking and protection integrated evaluation system of the present embodiment is actually used and propagation attenuation evaluation is performed, where NR-15, NR-25, NR-35, NR-45, NR-55, NR-65, NR-75, and NR-80 are sound pressure level curve values of each frequency band specified by international standard ISO, and in actual noise evaluation, the respective noise values of noise in the frequency band of 31.5Hz to 8000Hz are analyzed by the sound pressure sensing device, and a curve is drawn, where points tangent to the outside of NR15 to NR80 are points representing noise levels of the frequency band.
FIG. 10 is a diagram showing the sound pressure level changes of the internal and external frequency spectrums of the sound-blocking/sound-absorbing wall during the evaluation of noise reduction and isolation when the vibration noise simulation, transmission, isolation and protection integrated evaluation system of the present embodiment is actually used, wherein LXB-1, LXB-2, LXB-3 and LXB-4 respectively represent the internal sound pressure values of different sound-blocking/sound-absorbing walls.
Fig. 11 shows a simulated double ear internal and external spectrum variation graph when the vibration noise simulation, propagation, obstruction and protection integrated evaluation system of the embodiment is actually used for individual protection evaluation.
Through the vibration noise simulation, propagation, obstruction and protection integrated evaluation system, a specific noise source of a main noise place can be simulated, compared with the disadvantage that a conventional noise correlation experiment is based on an actual field noise source, the system of the embodiment ensures the saving of time and space resources, and can provide a system platform for the correlation noise experiment, the propagation attenuation evaluation, the obstruction and noise reduction evaluation and the individual protection evaluation.
The examples described herein are merely illustrative of the preferred embodiments of the present invention and do not limit the spirit and scope of the invention, and various modifications and improvements made to the technical solutions of the present invention by those skilled in the art without departing from the design concept of the present invention should fall within the protection scope of the present invention.
Claims (6)
1. A vibration noise simulation, propagation, obstruction and protection integrated evaluation system is characterized by comprising:
a vibration noise simulation unit (1) for simulating vibration noise sources of different frequency spectra and different sound pressure level distribution characteristics, the vibration noise simulation unit (1) comprising:
an interaction module (10) for inputting noise parameters to be simulated;
the parameter conversion module (11) is in signal connection with the interaction module (10), and an amplitude vibration frequency and sound pressure level frequency spectrum relation curve is arranged in the parameter conversion module (11) to convert the input noise parameters into vibration parameters;
the electric signal transmission module (12) is in signal connection with the parameter conversion module (11) and is used for transmitting the vibration parameters converted by the parameter conversion module (11);
the remote sensing shaft control machine (13) is in signal connection with the electric signal transmission module (12), receives the vibration parameters transmitted by the electric signal transmission module (12) and converts the vibration parameters into mechanical signals;
the resonance rod (14) is in transmission connection with the remote sensing axis control machine (13), the middle of the resonance rod (14) is in rotary connection with the fixed joint (15), the resonance rod (14) receives mechanical signals transmitted by the remote sensing axis control machine (13) and then vibrates around the fixed joint (15) according to the vibration frequency and amplitude, and the resonance rod (14) is arranged in the box body (100);
the output power amplification module (16) is arranged at an opening of the box body (100) and is used for outputting vibration noise generated by the resonance rod (14);
a propagation attenuation evaluation unit (2) arranged on the noise propagation path for simulating different microclimate parameters and measuring the propagation attenuation law of the noise, the propagation attenuation evaluation unit (2) comprising:
the microenvironment control room is used for simulating noise propagation microenvironments with different temperature, humidity, wind speed and air pressure parameters;
the sound pressure signal sensing device I is used for monitoring sound pressure changes of different spatial positions in the process of noise transmission inside and outside a microenvironment;
the first noise detection and analysis device is used for summarizing and analyzing the sound pressure signal obtained by the first sound pressure signal sensing device and outputting a spectrum sound pressure level spatial distribution cloud picture;
a blocking noise reduction evaluation unit (3) arranged on the noise propagation path for simulating different blocking noise reduction environments and measuring blocking effects of the different blocking noise reduction environments on noise, the blocking noise reduction evaluation unit (3) comprising:
the sound resisting/absorbing device is made of sound resisting/absorbing materials and used for simulating different sound resisting/absorbing scenes;
the sound pressure signal sensing device II is used for monitoring the sound pressure change inside and outside the sound resistance/absorption device;
the second noise detection and analysis device is used for summarizing and analyzing the sound pressure signals obtained by the second sound pressure signal sensing device and contrastingly displaying the sound pressure level change of the internal and external frequency spectrums of the resistance/sound absorption device;
an individual protection evaluation unit (4) arranged on a noise propagation path for measuring the blocking effect of different individual protection articles on noise in the human ear, the individual protection evaluation unit (4) comprising:
a beam bracket (40) arranged horizontally;
the fixed support (41) is fixedly connected below the two ends of the beam support (40);
a base (42) horizontally fixed to the bottom of the fixing bracket (41);
the simulated human ears (43) are formed by flexible silica gel materials according to the size of the human ears, and the number of the simulated human ears (43) is two, and the two simulated human ears are arranged on the two sides of the fixed support (41);
an individual noise-proof article (46) which is detachably worn on the simulated human ear (43);
a third sound pressure signal sensing device which is arranged in the simulated human ear (43) and is used for monitoring the sound pressure change inside and outside the simulated human ear (43);
and the third noise detection and analysis device is used for summarizing and analyzing the sound pressure signals obtained by the third sound pressure signal sensing device and comparing and displaying the sound pressure level change of the internal and external frequency spectrums of the simulated human ear (43).
2. The vibration noise simulation, propagation, obstruction and protection integrated evaluation system according to claim 1, wherein: the number of the resonance rods (14) is 13.
3. The integrated vibration noise simulation, propagation, blockage and protection assessment system according to claim 2, wherein the microenvironment regulated room comprises:
a sound insulation room which is a hollow hexahedral structure made of porous sound absorption material;
the air supply mechanism is communicated with the sound insulation room and is used for supplying air into the sound insulation room;
the pressure extraction fan is connected with the air supply mechanism and is used for controlling the air pressure and the air speed conveyed by the air supply mechanism;
the temperature and humidity regulating and controlling module is connected with the air supply mechanism and is used for controlling the temperature and the humidity conveyed by the air supply mechanism;
the environmental parameter monitoring mechanism is arranged in the sound insulation room and is used for monitoring the air pressure, the air speed, the temperature and the humidity of the environment in the sound insulation room;
the servo control mechanism is arranged outside the sound insulation room and is in signal connection with the air supply mechanism, the pressure extraction fan, the temperature and humidity regulation and control module and the environmental parameter monitoring mechanism, and the servo control mechanism is used for inputting and controlling air pressure, air speed, temperature and humidity in the sound insulation room.
4. The integrated vibration noise simulation, propagation, blockage and protection evaluation system according to claim 3, wherein the air supply mechanism comprises:
a main pipeline;
six branch pipelines (20), wherein one end of each branch pipeline (20) is communicated with the main pipeline;
six electromagnetic valves (21) provided in each branch line (20);
flow equalizing cover (22), it has six, and flow equalizing cover's (22) one end and the other end intercommunication that corresponds lateral conduit (20), flow equalizing cover's (22) other end border and the terminal surface border sealing connection in room that gives sound insulation, every flow equalizing cover (22) correspond and connect a terminal surface in room that gives sound insulation.
5. A vibration noise simulation, propagation, obstruction and protection integrated evaluation system according to claim 4, wherein the individual protection evaluation unit (4) further comprises:
the top cover (45) is movably connected to the top of the cross beam support (40), and the height of the top cover (45) in the vertical direction is adjustable and is used for supporting individual noise-proof articles (46).
6. The vibration noise simulation, propagation, obstruction and protection integrated evaluation system according to claim 1, wherein: the propagation attenuation evaluation unit (2), the blocking and noise reduction evaluation unit (3) and the individual protection evaluation unit (4) can be started independently or jointly.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003156388A (en) * | 2001-11-22 | 2003-05-30 | Okumura Corp | Sensing method for noise environment, trial listening apparatus and information storage medium |
| CN101375328A (en) * | 2006-01-26 | 2009-02-25 | 沃福森微电子股份有限公司 | Ambient noise reduction arrangement |
| CN109029692A (en) * | 2018-07-12 | 2018-12-18 | 军事科学院军事医学研究院环境医学与作业医学研究所 | Wearable patient-specific susceptibility assesses early warning system |
| CN109212511A (en) * | 2018-07-31 | 2019-01-15 | 哈尔滨工程大学 | A kind of stem acoustic platform sound absorption material structure noise reduction effect detection method |
| CN113776801A (en) * | 2021-09-07 | 2021-12-10 | 山东电力研究院 | Assessment method and system for joint effect of noise-proof earplugs and earmuffs in workplace |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2884768B1 (en) * | 2012-05-18 | 2016-08-17 | Kyocera Corporation | Measuring apparatus, measuring system and measuring method |
-
2021
- 2021-12-31 CN CN202111665851.4A patent/CN114295200B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003156388A (en) * | 2001-11-22 | 2003-05-30 | Okumura Corp | Sensing method for noise environment, trial listening apparatus and information storage medium |
| CN101375328A (en) * | 2006-01-26 | 2009-02-25 | 沃福森微电子股份有限公司 | Ambient noise reduction arrangement |
| CN109029692A (en) * | 2018-07-12 | 2018-12-18 | 军事科学院军事医学研究院环境医学与作业医学研究所 | Wearable patient-specific susceptibility assesses early warning system |
| CN109212511A (en) * | 2018-07-31 | 2019-01-15 | 哈尔滨工程大学 | A kind of stem acoustic platform sound absorption material structure noise reduction effect detection method |
| CN113776801A (en) * | 2021-09-07 | 2021-12-10 | 山东电力研究院 | Assessment method and system for joint effect of noise-proof earplugs and earmuffs in workplace |
Non-Patent Citations (1)
| Title |
|---|
| 基于声源识别及声场模拟的工厂通风系统降噪研究;王伟辉;《声学技术》;20170630;第267-275页 * |
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