CN112343382A - Transformer substation noise monitoring and noise reduction system and method - Google Patents
Transformer substation noise monitoring and noise reduction system and method Download PDFInfo
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- CN112343382A CN112343382A CN202011254925.0A CN202011254925A CN112343382A CN 112343382 A CN112343382 A CN 112343382A CN 202011254925 A CN202011254925 A CN 202011254925A CN 112343382 A CN112343382 A CN 112343382A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 70
- 230000009467 reduction Effects 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000010521 absorption reaction Methods 0.000 claims abstract description 47
- 238000004891 communication Methods 0.000 claims abstract description 8
- 238000009413 insulation Methods 0.000 claims abstract description 6
- 239000012774 insulation material Substances 0.000 claims abstract description 3
- 239000004593 Epoxy Substances 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 5
- 230000000694 effects Effects 0.000 description 11
- 239000011358 absorbing material Substances 0.000 description 6
- 230000005672 electromagnetic field Effects 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 229920000742 Cotton Polymers 0.000 description 4
- 239000011111 cardboard Substances 0.000 description 4
- 239000003822 epoxy resin Substances 0.000 description 3
- 239000011491 glass wool Substances 0.000 description 3
- 229920000647 polyepoxide Polymers 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 210000002268 wool Anatomy 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000011490 mineral wool Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H5/00—Buildings or groups of buildings for industrial or agricultural purposes
- E04H5/02—Buildings or groups of buildings for industrial purposes, e.g. for power-plants or factories
- E04H5/04—Transformer houses; Substations or switchgear houses
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
- E04B1/84—Sound-absorbing elements
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H1/00—Buildings or groups of buildings for dwelling or office purposes; General layout, e.g. modular co-ordination or staggered storeys
- E04H1/12—Small buildings or other erections for limited occupation, erected in the open air or arranged in buildings, e.g. kiosks, waiting shelters for bus stops or for filling stations, roofs for railway platforms, watchmen's huts or dressing cubicles
- E04H1/1205—Small buildings erected in the open air
- E04H1/1238—Shelters for engines, e.g. electrical meter housings
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups
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- Acoustics & Sound (AREA)
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- Electromagnetism (AREA)
- Power Engineering (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The invention discloses a transformer substation noise monitoring and reducing system and a method, wherein the transformer substation noise monitoring and reducing system comprises a shell, a top cover is arranged at the top of the shell, a sound insulation door is arranged on at least one side wall of the shell, the shell and the top cover are both made of sound insulation materials, a plurality of sound absorption plates are rotatably arranged on the inner side of the shell and are arranged in two layers, the sound absorption plates of the two layers are arranged in a staggered manner, an overlapping part is arranged between two adjacent sound absorption plates arranged in a staggered manner, and the sound absorption plates are detachably arranged on the inner side of the shell; the inboard detachable of top cap is provided with a plurality of sound roofs of inhaling, still including setting up the noise monitoring module at shell and top cap outer wall, noise monitoring module and controller communication connection, controller and terminal communication connection. The invention solves the problems that the existing built-in sound absorption layer and sound absorption shell can not locally replace sound absorption materials according to specific conditions and can not monitor to realize timely noise reduction.
Description
Technical Field
The invention relates to the technical field of electric power facilities, in particular to a transformer substation noise monitoring and noise reduction system and method.
Background
Along with the development of economy and the acceleration of urbanization process, the electric load of urban areas is continuously increased, more and more transformer substations are arranged in the urban areas, the distance between the transformer substations and residential buildings is closer and closer, and high noise can be generated during the operation of transformers in the transformer substations, so that the influence on nearby residents is generated.
Environmental pollution complaints caused by the influence of transformer noise are more and more, and noise reduction treatment is needed. The transformer substation adopts the means of making an uproar to fall and mainly includes that inner wall and the top at the transformer substation set up the sound absorbing layer or set up the shell that has the sound absorbing function in the outside of transformer substation, because the sound absorbing material that the sound absorbing layer adopted has certain life, use the function of making an uproar to fall the relatively poor performance of making an uproar even when the limit and do not have, current built-in sound absorbing layer all adopts the monolithic structure with the sound absorbing shell basically, be not convenient for change, and do not match the noise monitoring technique that corresponds, change the material when not knowing, the monolithic structure still has following defect: because the noise frequency and the decibel of different directions in the transformer substation probably are different, consequently, the sound absorbing layer of different directions and the service life of inhaling the sound shell are different, and prior art can not carry out the local sound absorbing material of changing according to particular case.
Disclosure of Invention
The invention aims to provide a transformer substation noise monitoring and noise reduction system and method, and solves the problems that an existing built-in sound absorption layer and a sound absorption shell cannot be used for locally replacing sound absorption materials according to specific conditions, and monitoring cannot be carried out to achieve timely noise reduction.
The invention is realized by the following technical scheme:
the transformer substation noise monitoring and reducing system comprises a shell, wherein a top cover is arranged at the top of the shell, a sound insulation door is arranged on at least one side wall of the shell, the shell and the top cover are both made of sound insulation materials, a plurality of sound absorption plates are rotatably arranged on the inner side of the shell, the sound absorption plates are arranged in two layers, the two layers of sound absorption plates are arranged in a staggered manner, an overlapping part is arranged between two adjacent sound absorption plates arranged in a staggered manner, and the sound absorption plates are detachably arranged on the inner side of the shell; the inboard detachable of top cap is provided with a plurality of sound roofs of inhaling, still including setting up the noise monitoring module at shell and top cap outer wall, noise monitoring module and controller communication connection, controller and terminal communication connection.
The shell and the top cover are of an integral structure, preferably of a sandwich structure, sound-absorbing materials are filled in a sandwich layer, and a sound-absorbing board is arranged in the sound-absorbing door; the noise monitoring module, the terminal and the controller are in the prior art, the terminal is a computer or a mobile phone and the like, and the noise monitoring module can be a noise sensor.
According to the invention, the plurality of sound-absorbing boards are arranged on the inner side of the shell, the sound-absorbing boards on adjacent layers are arranged in a staggered manner, the overlapped part is arranged between the two sound-absorbing boards which are arranged in a staggered manner, the sound-absorbing boards are rotatably arranged and detachably arranged on the inner side of the shell, most of noise can not be absorbed, the damage of the noise to the shell is reduced, the service life of the shell is prolonged, the sound-absorbing boards can be replaced, and due to the rotating arrangement, the sound-absorbing board arranged on one layer (inner layer) close to the shell can be taken out from a gap between the two adjacent sound-absorbing boards on the layer (outer layer) far away from the shell and can be.
The sound-absorbing board and the shell form secondary noise reduction, and the sound-absorbing top plate and the top cover form secondary noise reduction, so that the noise reduction effect is improved.
According to the invention, the outer wall of the shell and the outer wall of the top cover are provided with the noise monitoring modules, the noise monitoring modules are arranged at intervals and are respectively used for measuring noises in different areas, then the monitored noises are transmitted to the controller, the controller makes an analysis and judgment that the area corresponding to the noise monitoring modules exceeds the standard, if the controller sends an instruction to the terminal, a technician is informed to analyze whether the noise is caused by the reduction of the noise reduction performance of the sound absorption plate or the sound absorption top plate, and if the sound absorption plate or the sound absorption top plate in the corresponding area is replaced.
Preferably, camera means are provided on both the inside and outside of the housing in communicative connection with the controller.
Further, the inboard of shell is provided with the pivot, the lateral wall of abatvoix is provided with the arc cardboard, the detachable setting of arc cardboard is in the pivot.
The two ends of the rotating shaft are respectively fixed in the ground groove and the top groove, wherein the top groove is formed in the lower end face of the top fixing transverse plate.
The lateral wall of abatvoix specifically means the one side that is close to the shell, the lateral wall from the top down of abatvoix is provided with a plurality of arc cardboard, and a plurality of arc cardboards are a setting.
Preferably, the arc-shaped clamping plate has certain elasticity and can be made of plastics.
Further, the sound-absorbing plate is an arc-shaped plate recessed toward the housing.
According to the invention, the sound-absorbing plate is arranged as the arc-shaped plate, and the arc-shaped plate has a certain sound gathering effect, so that the sound-absorbing plate can better absorb noise and improve the noise absorption effect.
Furthermore, noise monitoring module and abatvoix one-to-one set up, noise monitoring module and the setting of inhaling the sound roof one-to-one.
Further, the top cap is the V-arrangement structure of handstand, the top of shell is provided with fixed diaphragm, the top of top cap is provided with fixed cross beam, inhale the detachable setting of sound roof between fixed diaphragm and fixed cross beam, inhale sound roof and top cap parallel arrangement.
The detachable connection that can realize inhaling the sound roof is set up.
Furthermore, the fixed cross beam is of a hollow structure, and the inner side of the fixed cross beam is filled with the sound absorption column.
The sound absorption column is made of glass wool or rock wool, and the sound absorption column is filled in the inner side of the fixed cross beam, so that the sound absorption effect of the cross beam is improved.
Furthermore, the sound-absorbing board and the sound-absorbing top board sequentially comprise a sound-absorbing layer and an electromagnetic shielding layer from inside to outside.
The sound absorption layer is made of glass wool or pearl wool, and the electromagnetic shielding layer is made of conductive rubber, an EMI conductive foam lining, a metal EMI lining or a wave absorbing material.
According to the transformer substation, the sound absorption board and the sound absorption top board sequentially comprise the sound absorption layer and the electromagnetic shielding layer from inside to outside, so that an electromagnetic field emitted by a coil in a transformer in the transformer substation cannot penetrate through and spread out, the influence of the electromagnetic field on the outside of the shell is prevented, the shell cannot vibrate due to the leaked electromagnetic field, and the effect of further reducing noise is achieved.
Furthermore, the shell and the top cover are both made of epoxy resin sound-absorbing boards.
The epoxy resin acoustic board is in the prior art, not only can give sound insulation, still has insulating advantage.
The noise reduction method based on the transformer substation noise monitoring and noise reduction system comprises the following steps:
s1, noise monitoring modules monitor noise signals outside the shell and the sound absorption top plate in real time and transmit the monitored noise signals to the controller, wherein each noise monitoring module is provided with a unique code;
s2, after the controller receives the noise signals of the noise monitoring modules, the noise signals monitored by different noise monitoring modules are respectively compared with the noise upper limit value stored by the controller, and if the noise signals monitored by the noise monitoring modules are larger than the upper limit value, the codes of the noise monitoring modules and the corresponding noise values are sent to a terminal;
and S3, replacing the sound absorption board or the sound absorption top board corresponding to the noise monitoring module under the code after the terminal receives the instruction sent by the controller.
Further, in step S2, when the noise signals monitored by the plurality of noise monitoring modules are all greater than the upper limit value, the controller sequences the noise signals monitored by the plurality of noise monitoring modules, and the sound-absorbing plate or the sound-absorbing top plate is replaced in order according to the sequence of the noise signals, wherein the sequence of the noise signals is processed from large to small.
The invention can sequence the noises larger than the upper limit value, and can preferentially replace the sound-absorbing plate or the sound-absorbing top plate with the worst noise reduction effect.
Further preferably, in the controller, the invention can sequence all the noises in different areas and judge the noise reduction effect of the sound-absorbing boards in different areas, so as to replace the sound-absorbing board to be replaced in advance.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. the invention can monitor the noise outside the shell and the top cover in real time, and timely replace the sound-absorbing plate or the sound-absorbing top plate according to the monitored noise, thereby avoiding the situation that the shell is not easy to replace after being damaged due to the fact that the shell absorbs the sound and reduces the noise directly, and the sound-absorbing plate or the sound-absorbing top plate can be replaced and is arranged at the inner side to absorb most of the noise, so that the direct replacement is only required after the damage, and the.
2. The sound-absorbing board and the shell form secondary noise reduction, and the sound-absorbing top plate and the top cover form secondary noise reduction, so that the noise reduction effect is improved.
3. The invention can sequence the noises larger than the upper limit value, and can preferentially replace the sound-absorbing plate or the sound-absorbing top plate with the worst noise reduction effect.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a transverse cross-sectional view of a noise reduction system;
FIG. 2 is a longitudinal cross-sectional view of a noise reduction system;
fig. 3 is a schematic view of the structure of the sound-absorbing panel.
Reference numbers and corresponding part names in the drawings:
the sound absorption and noise reduction device comprises a shell 1, a top cover 2, a sound absorption plate 3, a rotating shaft 4, an arc clamping plate 5, a noise monitoring module 6, a sound insulation door 7, a fixed transverse plate 8, a sound absorption top plate 9, a fixed cross beam 10 and a sound absorption column 11.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Example 1:
as shown in fig. 1-3, the transformer substation noise monitoring and reducing system includes a housing 1, a top cover 2 is disposed on the top of the housing 1, a soundproof door 7 is disposed on at least one side wall of the housing 1, the housing 1 and the top cover 2 are both made of epoxy resin sound-absorbing boards, and not only can insulate sound, but also have the advantage of insulation, the inner side of the housing 1 is rotatably provided with a plurality of sound-absorbing boards 3, specifically, the inner side of the housing 1 is provided with a rotating shaft 4, the outer side wall of each sound-absorbing board 3 is provided with an arc-shaped clamping board 5, the arc-shaped clamping boards 5 are detachably disposed on the rotating shaft 4, the arc-shaped clamping boards 5 are in clearance fit with the rotating shaft 4, the plurality of sound-absorbing boards 3 are disposed in two layers, the sound-absorbing boards 3 in the two; the inboard detachable a plurality of sound roof 9 of inhaling that are provided with of top cap 2, specifically, top cap 2 is the V-arrangement structure of handstand, the top of shell 1 is provided with fixed diaphragm 2, the top of top cap 2 is provided with fixed cross beam 10, inhale the detachable setting of sound roof 9 between fixed diaphragm 2 and fixed cross beam 10, inhale sound roof 9 and top cap 2 parallel arrangement, still including setting up noise monitoring module 6 at shell 1 and the 2 outer walls of top cap, noise monitoring module 6 and controller communication connection, controller and terminal communication connection, noise monitoring module 6 sets up with 3 one-to-one of abatvoix, noise monitoring module 6 sets up with inhaling sound roof 9 one-to-one, abatvoix 3 all adopts the sound absorbing material to make with inhaling sound roof 9, inhale the sound material and be glass cotton or cotton pearl.
The noise reduction method of the embodiment comprises the following steps:
s1, the noise monitoring modules 6 monitor noise signals outside the shell 1 and the sound absorption top plate 9 in real time and transmit the monitored noise signals to the controller, wherein each noise monitoring module 6 is provided with a unique code;
s2, after the controller receives the noise signal of the noise monitoring module 6, comparing the noise signal monitored by different noise monitoring modules 6 with the noise upper limit value stored by the controller, if the noise signal monitored by the noise monitoring module 6 is greater than the upper limit value, sending the code of the noise monitoring module 6 and the corresponding noise value to the terminal;
and S3, after receiving the command sent by the controller, the terminal replaces the sound-absorbing plate 3 or the sound-absorbing top plate 9 corresponding to the noise monitoring module 6 under the code.
Example 2:
as shown in fig. 1 to 3, the present embodiment is based on embodiment 1, and the sound-absorbing plate 3 is an arc-shaped plate that is recessed toward the housing 1.
Example 3:
as shown in fig. 1 to 3, in the present embodiment, based on embodiment 1, the fixed beam 10 is a hollow structure, and the inner side of the fixed beam 10 is filled with a sound absorbing column 11; the sound-absorbing plate 3 and the sound-absorbing top plate 9 sequentially comprise a sound-absorbing layer and an electromagnetic shielding layer from inside to outside, the sound-absorbing layer is made of glass wool or pearl wool, and the electromagnetic shielding layer is made of conductive rubber, an EMI conductive foam lining, a metal EMI lining or a wave-absorbing material.
In this embodiment, through setting up sound absorption column 11, the material that sound absorption column 11 adopted is glass cotton or pearl cotton, can improve top cap 2 inhale the sound effect, through with abatvoix 3 with inhale sound roof 9 all by interior sound absorption layer and electromagnetic shield layer of including in proper order outside to, can make the electromagnetic field that the coil sent in the transformer substation can't pierce through and spread, prevented the influence of electromagnetic field to shell 1 outside, and then make shell 1 can not take place to vibrate because of the electromagnetic field of revealing, reach the effect of further noise reduction.
Example 4:
as shown in fig. 1 to fig. 3, this embodiment is based on embodiment 1, and a processing unit for sorting noise signals is further provided in the controller.
In this embodiment, in step S2, when the noise signals monitored by the plurality of noise monitoring modules 6 are all greater than the upper limit value, the controller sorts the noise signals monitored by the plurality of noise monitoring modules 6, and the order of replacing the sound-absorbing panel 3 or the sound-absorbing top panel 9 is processed from large to small according to the sorted noise signals.
Example 5:
as shown in fig. 1 to 3, in the present embodiment, based on embodiment 1, each noise monitoring module 6 is further provided with a positioning module, which facilitates the technical finding of the sound-absorbing panel 3 or the sound-absorbing top panel 9 to be replaced.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. The transformer substation noise monitoring and reducing system comprises a shell (1), wherein a top cover (2) is arranged at the top of the shell (1), a sound insulation door (7) is arranged on at least one side wall of the shell (1), and the shell (1) and the top cover (2) are both made of sound insulation materials, and the transformer substation noise monitoring and reducing system is characterized in that a plurality of sound absorption boards (3) are rotatably arranged on the inner side of the shell (1), the sound absorption boards (3) are arranged in two layers, the sound absorption boards (3) in the two layers are arranged in a staggered manner, an overlapping part is arranged between every two adjacent sound absorption boards (3) in the staggered manner, and the sound absorption boards (3) are detachably arranged on the inner side of; the inboard detachable a plurality of sound roof (9) of inhaling that are provided with of top cap (2) is still including setting up noise monitoring module (6) at shell (1) and top cap (2) outer wall, noise monitoring module (6) and controller communication connection, controller and terminal communication connection.
2. The substation noise monitoring and reducing system according to claim 1, wherein a rotating shaft (4) is arranged on the inner side of the casing (1), an arc-shaped clamping plate (5) is arranged on the outer side wall of the sound-absorbing plate (3), and the arc-shaped clamping plate (5) is detachably arranged on the rotating shaft (4).
3. Substation noise monitoring and noise reduction system according to claim 1, characterized in that the sound-absorbing panel (3) is an arc-shaped panel that is concave towards the housing (1).
4. The substation noise monitoring and reducing system according to claim 1, wherein the noise monitoring modules (6) are arranged in one-to-one correspondence with the sound-absorbing panels (3), and the noise monitoring modules (6) are arranged in one-to-one correspondence with the sound-absorbing top panels (9).
5. The substation noise monitoring and reducing system according to claim 1, wherein the top cover (2) is an inverted V-shaped structure, a fixed transverse plate (2) is arranged at the top of the housing (1), a fixed cross beam (10) is arranged at the top of the top cover (2), the sound-absorbing top plate (9) is detachably arranged between the fixed transverse plate (2) and the fixed cross beam (10), and the sound-absorbing top plate (9) is arranged in parallel with the top cover (2).
6. Substation noise monitoring and noise reduction system according to claim 5, characterized in that the fixed cross beam (10) is a hollow structure, the inner side of the fixed cross beam (10) being filled with a sound absorbing column (11).
7. The substation noise monitoring and reducing system according to claim 1, wherein the sound-absorbing plate (3) and the sound-absorbing top plate (9) each comprise a sound-absorbing layer and an electromagnetic shielding layer in sequence from inside to outside.
8. Substation noise monitoring and reduction system according to any of claims 1-7, characterized in that the housing (1) and the top cover (2) are both made of epoxy acoustic panels.
9. The substation noise monitoring and reducing system noise reduction method according to any one of claims 1 to 8, comprising the steps of:
s1, the noise monitoring modules (6) monitor noise signals on the outer sides of the shell (1) and the sound absorption top plate (9) in real time and transmit the monitored noise signals to the controller, wherein each noise monitoring module (6) is provided with a unique code;
s2, after the controller receives the noise signals of the noise monitoring module (6), comparing the noise signals monitored by different noise monitoring modules (6) with the noise upper limit value stored by the controller, and if the noise signals monitored by the noise monitoring modules (6) are greater than the upper limit value, sending the codes of the noise monitoring modules (6) and the corresponding noise values to the terminal;
and S3, after receiving the command sent by the controller, the terminal replaces the sound-absorbing plate (3) or the sound-absorbing top plate (9) corresponding to the noise monitoring module (6) under the code.
10. The substation noise monitoring and reducing system noise reduction method according to claim 9, wherein in step S2, when the noise signals monitored by the plurality of noise monitoring modules (6) are all greater than the upper limit value, the controller sequences the noise signals monitored by the plurality of noise monitoring modules (6), and the sound absorption board (3) or the sound absorption top board (9) is replaced according to the sequence of the sequenced noise signals from large to small.
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| CN202011254925.0A CN112343382B (en) | 2020-11-11 | 2020-11-11 | Transformer substation noise monitoring and noise reduction system and method |
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| CN202011254925.0A CN112343382B (en) | 2020-11-11 | 2020-11-11 | Transformer substation noise monitoring and noise reduction system and method |
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| CN112343382B CN112343382B (en) | 2022-06-24 |
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| CN113135152A (en) * | 2021-03-12 | 2021-07-20 | 上海大学 | Automobile noise reduction system |
| CN115790832A (en) * | 2023-02-07 | 2023-03-14 | 山东世卓泽坤节能环保科技有限公司 | Noise management system and method based on sound absorption and insulation module |
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| CN113135152A (en) * | 2021-03-12 | 2021-07-20 | 上海大学 | Automobile noise reduction system |
| CN115790832A (en) * | 2023-02-07 | 2023-03-14 | 山东世卓泽坤节能环保科技有限公司 | Noise management system and method based on sound absorption and insulation module |
| CN115790832B (en) * | 2023-02-07 | 2023-04-21 | 山东世卓泽坤节能环保科技有限公司 | Noise management system and method based on sound absorption and insulation module |
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