CN218059988U - Sound insulation board with structure health degree self-monitoring function - Google Patents
Sound insulation board with structure health degree self-monitoring function Download PDFInfo
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- CN218059988U CN218059988U CN202222536300.4U CN202222536300U CN218059988U CN 218059988 U CN218059988 U CN 218059988U CN 202222536300 U CN202222536300 U CN 202222536300U CN 218059988 U CN218059988 U CN 218059988U
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Abstract
The utility model relates to a sound insulating board with structure health degree is from monitoring function has buried two or more single mode fiber underground in the sound insulating board body, one of them single mode fiber arrange in the tip of sound insulating board body is as reference optic fibre, and all the other single mode fiber are arranged in this internal conduct sensing optical fibre of sound insulating board, single mode fiber's one end is provided with the end mirror, reference optic fibre with sensing optical fibre constitutes jointly to be buried underground this internal michelson interference type optical fiber sensor of sound insulating board. The utility model has the advantages that: the high-precision monitoring of the structural health of the sound insulation plate is realized; the structure is simple and reasonable, the single-mode optical fiber embedded in the sound insulation board can be effectively protected, the use precision is ensured, and the service life is prolonged; when the sound insulation plate is a transparent sound insulation plate, the functions of decoration and bird collision prevention can be realized while light transmission is realized; the manufacturing process is convenient, the use is convenient, and the sound insulation structure can be applied to various use occasions needing to build the sound insulation structure.
Description
Technical Field
The utility model belongs to the technical field of traffic noise treatment technique and specifically relates to an acoustic baffle with structure health degree is from monitoring function.
Background
The sound barrier is a main method for solving the problem of rail transit noise. The sound barrier is installed on the track traffic overhead line and passes through the resident concentrated distribution section. When the train passes through the sound barrier setting range, can frequently produce aerodynamic force wind load, the sound barrier is in all the time and inhales one towards the state, and the material "fatigue" appears in the difficult emergence. The fixed parts such as bolts and inserting plates are easy to loosen, and finally the sound barrier is deformed and broken or the foundation collapses. If the vehicle is not found in time, safety accidents are caused, and accidents are caused to the driving of the vehicle.
Therefore, after the sound barrier is installed, the transportation and maintenance department must frequently perform on-site inspection on the foundation, the stable structure of the upright post, the surface damage, the corrosion prevention of the component and the like. At present, the frequency of detecting the bolts of the sound barrier by an operation and maintenance department is usually once a quarter, although the frequency can adapt to the loosening and aging period of the bolt parts, the examination of the health state of the sound barrier is not timely and intelligent enough, and a plurality of operation difficulties also exist. And the monitoring method is also mostly manual visual spot inspection, is limited by visual conditions at night, and is not timely and comprehensive in problem discovery.
In the prior art, a sound barrier monitoring system and method with the patent number CN201710885103 disclose that the sound barrier monitoring system comprises a plurality of sound barrier monitoring devices and a background data management unit, wherein each sound barrier monitoring device comprises a vibration acceleration detection unit and a data acquisition and transmission unit, the vibration acceleration detection unit is installed on the outer side of a sound barrier screen to acquire a vibration acceleration signal generated by a pulsating load generated when a train passes through the sound barrier screen to the top end of an upright post of the sound barrier screen, and the background data management unit is used for carrying out sound barrier structure fault diagnosis by combining the vibration acceleration signal and a fault diagnosis model to obtain a sound barrier structure safety assessment report and complete assessment on the sound barrier service safety condition.
However, the scheme mainly aims at the pulsating load generated when the train passes through the sound barrier, but the sound barrier is influenced by various aspects such as the change of the environmental temperature, the basic deformation and the settlement of the position where the sound barrier is arranged, and the vibration acceleration signal cannot measure the influence of the above conditions on the sound barrier, so that the estimated state of the sound barrier cannot reflect the actual condition of the sound barrier.
The patent number is CN 208328736U's a metal sound barrier with monitor function, and it discloses including aluminum alloy ribbing backplate, aluminum alloy panel and a plurality of force cell sensors that punch a hole, and aluminum alloy ribbing backplate passes through aluminum alloy frame and is fixed with the aluminum alloy panel that punches a hole, and a plurality of force cell sensors set up at aluminum alloy ribbing backplate and the inboard central zone of aluminum alloy panel that punches a hole, and force cell sensor transmits the signal to computer terminal. According to the technical scheme, the panel and the back plate can be subjected to real-time force measurement monitoring, so that the purpose of knowing the health state of the sound barrier at any time is achieved, the stress state of the metal sound barrier is monitored in real time, and the problems of looseness and the like can be judged at the first time.
However, the monitoring principle in the scheme is still that the pulse load generated when the train passes through acts on the sound barrier cell plate, the cell plate vibrates, and the state of the sound barrier cannot be comprehensively evaluated.
The patent number CN210194460U discloses a sound barrier including at least two fixed frames, at least one sound insulation board and a plurality of detection units, wherein the sound insulation board is installed between two adjacent fixed frames, the plurality of detection units are installed at two side edges of the sound insulation board, and a limit component arranged on the sound insulation board is configured to extend out of a corresponding limit hole on the fixed frame to realize fixed connection when the sound insulation board and the fixed frames move to a predetermined position relatively; the state of acoustic celotex board is judged to the distance between the side that detects the acoustic celotex board through the infrared distance measuring sensor as detecting element to the fixed frame, can in time overhaul the acoustic celotex board and handle, ensures the safe handling of sound barrier.
However, the actual function of the scheme is warning after the actual structural falling, and the scheme does not have the function of prejudgment, so that the sound insulation board can only be subsequently remedied after falling, and cannot give out early warning when a certain falling risk exists in the sound insulation board.
Disclosure of Invention
The utility model aims at providing a sound insulation board with structure health degree is from monitoring function according to above-mentioned prior art not enough, constitutes michelson interference type optical fiber sensor through burying single mode fiber underground in the sound insulation board, realizes the monitoring to sound insulation board surface strain to judge the decay change degree of screen body material, thereby carry out the high accuracy monitoring to the structure health degree of sound insulation board.
The utility model discloses the purpose is realized accomplishing by following technical scheme:
the utility model provides an acoustic baffle with structure health degree is from monitoring function, includes the acoustic baffle body, its characterized in that: the utility model discloses a sound insulation board, including sound insulation board body, single mode fiber, reference optical fiber, sensing optical fiber, the sound insulation board is this internal to be buried there are two or more than two single mode fiber in the sound insulation board, one of them single mode fiber arrange in the tip of sound insulation board body is as reference optical fiber, and remaining single mode fiber arrange in this internal conduct sensing optical fiber of sound insulation board, single mode fiber's one end is provided with the end mirror, reference optical fiber with sensing optical fiber constitutes jointly and buries underground this internal michelson interference type fiber sensor of sound insulation board.
The sound insulation board is characterized in that the reference optical fiber and the two or more sensing optical fibers are embedded in the sound insulation board body, and the reference optical fiber and the sensing optical fibers are arranged at equal intervals in the height direction of the sound insulation board body.
The sound insulation board body is a transparent sound insulation board and is composed of two pieces of light-transmitting glass, an adhesive layer is arranged between the two pieces of light-transmitting glass, and the single-mode optical fiber is embedded in the adhesive layer.
And a decorative strip is embedded in the laminated layer and is arranged at equal intervals with the single-mode optical fiber.
The sound insulation board body is a metal sound barrier unit board and comprises a perforated panel and a fiber protective layer, and the single-mode optical fiber is attached to the back side of the perforated panel and covered by the fiber protective layer.
And the other end of the single-mode optical fiber is provided with an optical fiber connector.
The single mode fiber is connected with a coupler through the fiber connector, and the coupler is connected with a light source and a demodulator.
The utility model has the advantages that: the high-precision monitoring of the structural health of the sound insulation plate is realized; the structure is simple and reasonable, the single-mode optical fiber embedded in the sound insulation plate can be effectively protected, the use precision is ensured, and the service life is prolonged; when the sound insulation plate is a transparent sound insulation plate, the functions of decoration and bird collision prevention can be realized while light transmission is realized; the sound insulation structure is convenient to manufacture and use, and can be applied to various occasions needing to build a sound insulation structure, such as roads, rail transit, railways and the like.
Drawings
FIG. 1 is a schematic view of the present invention;
fig. 2 is a schematic structural diagram of a medium mode optical fiber according to the present invention;
FIG. 3 is a schematic diagram of the monitoring of the present invention;
FIG. 4 is a schematic view of the structure of the transparent sound-proof plate of the present invention;
fig. 5 is a schematic structural view of the metal sound barrier unit plate of the present invention.
Detailed Description
The features of the present invention and other related features are described in further detail below by way of example in conjunction with the accompanying drawings to facilitate understanding by those skilled in the art:
as shown in fig. 1-5, reference numerals 1-17 in the figures denote: the optical fiber sensor comprises a transparent sound insulation plate 1, a sensing optical fiber 2, a reference optical fiber 3, a decorative strip 4, an end mirror 5, a frame 6, a coupler 7, a light source 8, a demodulator 9, a single-mode optical fiber 10, an optical fiber connector 11, a lens 12, a sensing optical fiber end mirror 13, a reference optical fiber end mirror 14, light-transmitting glass 15, a perforated panel 16 and a fiber protection layer 17.
The first embodiment is as follows: as shown in fig. 1, in the present embodiment, the transparent sound-insulating panel having the self-monitoring function of structural health degree is a transparent sound-insulating panel 1, and the transparent sound-insulating panel 1 has a sound-insulating function and a light-transmitting function and is installed in a frame 6. Two single mode fibers and a plurality of decorative strips 4 are embedded in the plate body of the transparent sound insulation plate 1, each single mode fiber and each decorative strip 4 are arranged in an extending mode along the horizontal direction of the transparent sound insulation plate 1 and are arranged at equal intervals, wherein the two single mode fibers form a Michelson interference type fiber sensor in a combined mode and are used for monitoring the strain of the transparent sound insulation plate 1, and the decorative strips 4 are used for achieving the functions of decoration and bird collision prevention.
Specifically, as shown in fig. 1 and 2, two single-mode optical fibers 10 are embedded in the transparent sound insulating panel 1, and each single-mode optical fiber 10 has an end mirror 5 at one end and an optical fiber connector 11 at the other end. One of the single-mode optical fibers 10 embedded in the middle of the transparent sound insulation plate 1 serves as a sensing optical fiber 2, the other single-mode optical fiber is embedded in the bottom end of the transparent sound insulation plate 1 serves as a reference optical fiber 3, and the sensing optical fiber 2 and the reference optical fiber 3 are combined to form the Michelson optical fiber sensor.
As shown in fig. 1 and 3, the sensing fiber 2 and the reference fiber 3 are connected to the coupler 7 through respective fiber connectors 11, the coupler 7 connects the light source 8 and the demodulator 9, and a lens 12 is disposed on the optical path between the light source 8 and the coupler 7. When in use, the light source 8 can adopt a laser generator, laser emitted by the laser generator enters the coupler 7 through the lens 12, and the coupler 7 divides the laser into two light beams with equal intensity and respectively enters the sensing optical fiber 2 and the reference optical fiber 3; the light beams in the sensing optical fiber 2 and the reference optical fiber 3 are reflected by a sensing optical fiber end mirror 13 and a reference optical fiber end mirror 14 at the respective tail ends and then interfered at the output end of the coupler 7, the interference signal is detected by a demodulator 9 to obtain the light intensity change, the light intensity change and the strain change of the sensing optical fiber 2 are in cosine relation, and the strain change is quantitatively detected by the light intensity.
When the transparent sound insulation plate 1 is strained, the horizontal strain at the middle position of the transparent sound insulation plate 1 is more obvious than that at the end part, and the strain of the embedded sensing optical fiber 2 causes the change of the light ray refractive index, so that the optical path difference between the optical path of the sensing optical fiber 2 and the optical path difference between the reference optical fiber 3 is changed, the change of the light intensity of the interference fringes can be detected by the demodulator 9, the strain condition borne by the transparent sound insulation plate 1 is monitored, and the monitoring of the structural health degree of the transparent sound insulation plate 1 is realized.
As shown in fig. 4, when manufacturing, the transparent sound-proof plate 1 is made of two pieces of transparent glass 15, and an adhesive layer is disposed between the two pieces of transparent glass 15, so that the two pieces of transparent glass 15 can be connected to form an integral structure through the adhesive layer. The single mode fiber 10 and the decorative strip 4 are embedded in the adhesive sandwiched layer, so that the single mode fiber 10 and the decorative strip 4 can be positioned in the protection of the adhesive sandwiched layer, and the structural safety of the single mode fiber and the decorative strip is effectively ensured.
Example two: the difference between the present embodiment and the first embodiment is: the sound insulating plate in the first embodiment is a transparent sound insulating plate, and the sound insulating plate in the first embodiment is a metal sound barrier cell plate, and a michelson interference type optical fiber sensor composed of a single-mode optical fiber is also embedded in the metal sound barrier cell plate. During manufacturing, the metal sound barrier unit is formed by combining a perforated panel, a sound absorption material, a supporting plate, a back plate and the like, wherein the single-mode optical fibers 10 can be attached to the back side of the perforated panel 16 in advance before combination and then covered by a fiber protective layer 17, so that the single-mode optical fibers 10 are ensured to be closely attached, and the monitoring precision is further ensured.
The above embodiments are embodied as follows: besides the arrangement structure of one sensing fiber 2 and one reference fiber 3 adopted in the above embodiment, a plurality of single-mode fibers as the sensing fibers 2 can be embedded in the acoustic baffle to monitor the strain conditions of different position areas of the acoustic baffle, so that the structural health degree of the acoustic baffle can be evaluated more comprehensively.
Although the conception and the embodiments of the present invention have been described in detail with reference to the drawings, those skilled in the art will recognize that various changes and modifications can be made therein without departing from the scope of the appended claims, and therefore, the description is not repeated herein.
Claims (7)
1. The utility model provides an acoustic baffle with structure health degree is from monitoring function, includes the acoustic baffle body, its characterized in that: the utility model discloses a sound insulation board, including sound insulation board body, single mode fiber, reference optical fiber, sensing optical fiber, the sound insulation board is this internal to be buried there are two or more than two single mode fiber in the sound insulation board, one of them single mode fiber arrange in the tip of sound insulation board body is as reference optical fiber, and remaining single mode fiber arrange in this internal conduct sensing optical fiber of sound insulation board, single mode fiber's one end is provided with the end mirror, reference optical fiber with sensing optical fiber constitutes jointly and buries underground this internal michelson interference type fiber sensor of sound insulation board.
2. The acoustic panel with self-monitoring function of structural health according to claim 1, wherein: the sound insulation board is characterized in that the reference optical fiber and the two or more sensing optical fibers are embedded in the sound insulation board body, and the reference optical fiber and the sensing optical fibers are arranged at equal intervals in the height direction of the sound insulation board body.
3. The acoustic panel with the self-monitoring function of the structural health degree according to claim 1, characterized in that: the sound insulation board body is a transparent sound insulation board and is composed of two pieces of light-transmitting glass, an adhesive layer is arranged between the two pieces of light-transmitting glass, and the single-mode optical fiber is embedded in the adhesive layer.
4. The acoustic panel with the self-monitoring function of the structural health degree according to claim 3, characterized in that: and a decorative strip is embedded in the laminated layer and is arranged at equal intervals with the single-mode optical fiber.
5. The acoustic panel with the self-monitoring function of the structural health degree according to claim 1, characterized in that: the sound insulation board body is a metal sound barrier unit board and comprises a perforated panel and a fiber protective layer, and the single-mode optical fiber is attached to the back side of the perforated panel and covered by the fiber protective layer.
6. The acoustic panel with the self-monitoring function of the structural health degree according to claim 1, characterized in that: and the other end of the single-mode fiber is provided with a fiber connector.
7. The acoustic panel with the self-monitoring function of the structural health degree according to claim 6, wherein: the single mode fiber is connected with a coupler through the fiber connector, and the coupler is connected with a light source and a demodulator.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222536300.4U CN218059988U (en) | 2022-09-26 | 2022-09-26 | Sound insulation board with structure health degree self-monitoring function |
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| CN202222536300.4U CN218059988U (en) | 2022-09-26 | 2022-09-26 | Sound insulation board with structure health degree self-monitoring function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024066948A1 (en) * | 2022-09-26 | 2024-04-04 | 中铁上海设计院集团有限公司 | Noise barrier realizing real-time monitoring of structural state of health, and design method therefor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024066948A1 (en) * | 2022-09-26 | 2024-04-04 | 中铁上海设计院集团有限公司 | Noise barrier realizing real-time monitoring of structural state of health, and design method therefor |
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