CN106918294A - The method that application distribution formula bare optical fibers and bare optical gratings carry out building structure health monitoring - Google Patents
The method that application distribution formula bare optical fibers and bare optical gratings carry out building structure health monitoring Download PDFInfo
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- CN106918294A CN106918294A CN201710090738.5A CN201710090738A CN106918294A CN 106918294 A CN106918294 A CN 106918294A CN 201710090738 A CN201710090738 A CN 201710090738A CN 106918294 A CN106918294 A CN 106918294A
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- bare optical
- optical fibers
- bare
- monitoring point
- building structure
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
- G01B11/165—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge by means of a grating deformed by the object
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/32—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres
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- General Physics & Mathematics (AREA)
- Emergency Alarm Devices (AREA)
Abstract
The invention provides a kind of method that application distribution formula bare optical fibers and bare optical gratings carry out building structure health monitoring.The method includes：Monitoring point is selected in the component surface of building structure, fiber arrangement path, the laying optical fiber on the fiber arrangement path are set according to all of monitoring point；Distributed bare optical fibers and bare optical gratings sensor is set on the optical fiber, and the distributed bare optical fibers and bare optical gratings sensor is corresponding with the monitoring point；By all distributed bare optical fibers and bare optical gratings sensor network consistings, by the distributed bare optical fibers and bare optical gratings sensor senses and the temperature and strain variation that record the building structure.The health monitor method can be used for ancient building structure temperature and deformation monitoring, high temperature alarm, the generation of fire preventing；Excessive and drastically deformation alarm, takes maintenance and reinforcement measure, it is to avoid structural damage and collapse in time.
Description
Technical field
Built the present invention relates to structural health monitoring technology field, more particularly to a kind of application distribution formula bare optical fibers and bare optical gratings
The method of building structure health monitoring.
Background technology
Structural healthy monitoring system is now widely used for the great or labyrinth of civil engineering, to aid in pacifying structure
Full situation is judged.The health monitoring research of ancient building is not only as ancient building reinforcement protection provides quantification and qualification
Instrument, is also the important component of ancient building administration of estate work.According to the world cultural heritage committee and the Chinese government
Requirement to world cultural heritage monitoring, health monitoring and the protection of ancient building are imperative.
Traditional building structure health monitor method has：Manual patrol, geodesic method, three-dimensional laser scanning technique, electricity
Survey method etc..FBG monitoring technology receives the affirmative of increasing Health Monitoring for Civil Engineering industry, is particularly protecting
The health monitoring aspect of building is protected, the safety and reliability of structure is improved, and extend its useful life etc., FBG monitoring
Technology plays an important role.
At present, also effectively utilize fiber grating pair building structure and carry out the side of health monitoring without a kind of in the prior art
Method.
The content of the invention
The embodiment provides the side that a kind of application distribution formula bare optical fibers and bare optical gratings carry out building structure health monitoring
Method, to realize effectively carrying out health monitoring to building structure.
To achieve these goals, this invention takes following technical scheme.
A kind of method that application distribution formula bare optical fibers and bare optical gratings carry out building structure health monitoring, including：
Monitoring point is selected in the component surface of building structure, fiber arrangement path is set according to all of monitoring point, in institute
State laying optical fiber on fiber arrangement path；
Distributed bare optical fibers and bare optical gratings sensor, the distributed bare optical fibers and bare optical gratings sensor and institute are set on the optical fiber
State monitoring point correspondence；
By all distributed bare optical fibers and bare optical gratings sensor network consistings, by the distributed bare optical fibers and bare optical gratings sensor sense
Know and record the temperature and strain variation of the building structure.
Further, the optical fiber is bare fibre, and the fiber-optic grating sensor is bare optical fibers and bare optical gratings.
Further, according to structural elements the distance between monitoring point quantity and monitoring point parameter, in the distribution
The Bragg grating with corresponding monitoring point identical parameters is scribed on formula bare fibre.
Further, the monitoring point includes Deformation control monitoring point and temperature control monitoring point.
Further, using adhesive by the distributed bare optical fibers and bare optical gratings corresponding at monitoring point and building structure
Component be adhesively fixed.
Further, whole optical fiber only bonds bare optical fibers and bare optical gratings part, as signal transmission except bare optical fibers and bare optical gratings portion
/ outer other parts need not be bonded.
The technical scheme provided by embodiments of the invention described above can be seen that ancient architecture of the present invention suitable for ambient stable
In building structure；And suitable for the monitoring of narrow space or irregular structure component；It is applied to component complexity and Tourism Concept simultaneously
Light is frequent, it is desirable to which monitoring is damaged in slight ancient building structural elements (such as pattern is exquisite, decorative pattern is complicated wooden frame or pin).
The additional aspect of the present invention and advantage will be set forth in part in the description, and these will become from the following description
Obtain substantially, or recognized by practice of the invention.
Brief description of the drawings
Technical scheme in order to illustrate more clearly the embodiments of the present invention, below will be to that will use needed for embodiment description
Accompanying drawing be briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for this
For the those of ordinary skill of field, without having to pay creative labor, other can also be obtained according to these accompanying drawings
Accompanying drawing.
Fig. 1 is the schematic diagram that application bare optical fibers and bare optical gratings provided in an embodiment of the present invention carry out health monitoring to building structure.
Fig. 2 is that schematic diagram is chosen in the monitoring point of building structural element provided in an embodiment of the present invention.
Fig. 3 is measuring point fiber deployment schematic diagram provided in an embodiment of the present invention.
Fig. 4 is optical fiber point bonding schematic diagram at integrally-built monitoring point provided in an embodiment of the present invention.
Fig. 5 is optical fiber point bonding schematic diagram at the single monitoring point of part provided in an embodiment of the present invention.
Specific embodiment
Embodiments of the present invention are described below in detail, the example of the implementation method is shown in the drawings, wherein ad initio
Same or similar element or element with same or like function are represented to same or similar label eventually.Below by ginseng
The implementation method for examining Description of Drawings is exemplary, is only used for explaining the present invention, and is not construed as limiting the claims.
Those skilled in the art of the present technique are appreciated that unless expressly stated, singulative " " used herein, " one
It is individual ", " described " and " being somebody's turn to do " may also comprise plural form.It is to be further understood that what is used in specification of the invention arranges
Diction " including " refer to the presence of the feature, integer, step, operation, element and/or component, but it is not excluded that in the presence of or addition
One or more other features, integer, step, operation, element, component and/or their group.It should be understood that when we claim unit
Part is " connected " or during " coupled " to another element, and it can be directly connected or coupled to other elements, or can also exist
Intermediary element.Additionally, " connection " used herein or " coupling " can include wireless connection or coupling.Wording used herein
"and/or" includes one or more associated any cells for listing item and all combines.
Those skilled in the art of the present technique are appreciated that unless otherwise defined, all terms used herein (including technology art
Language and scientific terminology) have with art of the present invention in those of ordinary skill general understanding identical meaning.Should also
Understand, those terms defined in such as general dictionary should be understood that the meaning having with the context of prior art
The consistent meaning of justice, and unless defined as here, will not be with idealizing or excessively formal implication be explained.
For ease of the understanding to the embodiment of the present invention, done by taking several specific embodiments as an example further below in conjunction with accompanying drawing
Explanation, and each embodiment does not constitute the restriction to the embodiment of the present invention.
Embodiment one
The embodiment of the present invention, for specific building structure monitoring requirements, is carried to overcome the shortcomings of traditional monitoring method
Supply under the premise of a kind of micro-damage, using the specific monitoring point of bare optical fibers and bare optical gratings Sensor monitoring structural elements, reached monitoring of structures
The structure health monitoring method of the deformation of member and temperature mesh ground.
The method that the application distribution formula bare optical fibers and bare optical gratings that the embodiment of the present invention is proposed carry out building structure health monitoring includes：
First choose representative a number of on building structural element (such as beam column) surface for needing to carry out health monitoring
Monitoring point, and strain according to these monitoring points or temperature monitoring can obtain deformation or the temperature change of component.According to all
Monitoring point setting fiber arrangement path, the laying optical fiber on the fiber arrangement path；Set on the optical fiber distributed
Bare optical fibers and bare optical gratings sensor, the distributed bare optical fibers and bare optical gratings sensor is corresponding with the monitoring point.Then, by all distributions
Bare optical fibers and bare optical gratings sensor network consisting, converges into comprehensive monitoring structural health conditions network, by the distributed bare fibre light
Gate sensor perceives and records the temperature and strain variation of the building structure.
In actual applications, rational simple optical fiber arrangement network can be selected to the building structural element of needs measurement,
So as to the strain or temperature survey of multiple components can be completed by single bare fibre.
, from distributed bare optical fibers and bare optical gratings as fiber-optic grating sensor, distributed bare optical fibers and bare optical gratings are to structure for the present invention
Strain or temperature carry out health monitoring, and grating is write using rational engrating process, and the parameter of scribing of grating should be with prison on component
Measuring point is corresponding.When preparing distributed bare optical fibers and bare optical gratings sensor, be according to the monitoring point quantity of structural elements and point and point
The distance between etc. parameter, the Prague with counterpart member monitoring point identical parameters is scribed on selected distributed bare fibre
Grating.The parameter of above-mentioned monitoring point refers to：The distance between monitoring point and monitoring point, monitoring point quantity etc..
What fiber-optic grating sensor referred to is exactly bare optical fibers and bare optical gratings, and each grating will be corresponded with monitoring point, also may be used
To say that each grating is exactly a sensor, the position of fiber-optic grating sensor is identical with monitoring location.Distributed naked light
The parameter of fine grating includes：Grating quantity, grating space, grating length, grating strain measurement range etc.." distribution " refers to one
Multiple gratings can be scribed on root optical fiber so as to measure multiple point positions.
It is adhesively fixed in monitoring point using the preferable adhesive of strain transfer between fiber-optic grating sensor and structural elements；
After laying the fibre-optical grating sensor networking for completing, knot is monitored by fiber Bragg grating (FBG) demodulator real-time perception and record
The temperature and strain variation of structure, so as to realize the health monitoring to aspects such as building structure high temperature (fire), stress and deformations.
Above-mentioned component monitoring point should choose the limited measuring point of reactive means deformation characteristic, between measuring point range of strain and measuring point
Required away from optical fiber material should be met.
Above-mentioned simple optical fiber deposition path, is considered as the position of structural elements, and reasonable Arrangement simple optical fiber is so as to realize choosing
Determine the health monitoring of component.
Described adhesive, chooses the good gel-type of transport, and colloid has certain protective role, can improve to grating
The durability of Fibre Optical Sensor.
Described adhesive, the bonding at the corresponding monitoring point of grating, whole optical fiber and structural elements point bonding, as light
The fiber segment of signal transmission effect is selectively bonded according to demand.
The optical fibre interrogation device is to derive extraneous strain or temperature change by the change of Detection wavelength, so as to structure
Part deforms or member temperature plays monitoring effect.
After laying the fibre-optical grating sensor networking for completing, by fiber Bragg grating (FBG) demodulator real-time perception and record
The temperature and strain variation of institute's monitoring of structures, so as to realize the health monitoring to aspects such as building structure high temperature (fire), deformations.
Because bare optical fibers and bare optical gratings sensor diameter is small, therefore the tolerance of its radial shear is poor, easily loses.Cause
This, in use must careful operation, to ensure the normal service life of bare optical fibers and bare optical gratings sensor.And distributed naked light
, using test gratings qualification rate is preceding answered, the strain or range of temperature for monitoring component should be in distributed bare optical fibers and bare optical gratings for fine grating
Range ability within.
Embodiment two
Fig. 1 is the schematic diagram that application bare optical fibers and bare optical gratings provided in an embodiment of the present invention carry out health monitoring to building structure
Show, measuring point 4 is chosen in structural elements (beam 1 or post 2) appropriate location；And according to point position laying optical fiber 3；And in measuring point 4
Place carries out point bonding using adhesive to optical fiber；Finally optical fiber is connected with (FBG) demodulator 5, health monitoring is carried out to structure.
Fig. 2 is that schematic diagram is chosen in the monitoring point of building structural element provided in an embodiment of the present invention, to structural elements (beam 1
Or post 2) suitably assessed, choose Deformation control monitoring point 4 or temperature control monitoring point 4.
Fig. 3 is fiber deployment schematic diagram in monitoring point provided in an embodiment of the present invention, according to the monitoring point 4 chosen, from conjunction
The optical fiber 3 of suitable length, and according to the parameter of monitoring point grating is scribed on optical fiber.Grating after scribing corresponds to monitoring
Point 4, the laying optical fiber in building structure.
Fig. 4 is optical fiber point bonding schematic diagram at integrally-built monitoring point provided in an embodiment of the present invention.Optical fiber 3 is laid
Afterwards, point bonding is carried out using adhesive 7 at the corresponding position of monitoring point 4 of grating, optical fiber is fixed on by structure (beam 1 with this
Or post 2) on.Optical fiber is connected to (FBG) demodulator 5 afterwards, intactly distributed bare optical fibers and bare optical gratings structure monitoring system is formed.
Fig. 5 be the single monitoring point of part provided in an embodiment of the present invention at optical fiber point bonding schematic diagram, the only grating of optical fiber 3 with
Structural elements is bonded.It is preferably gluing that binding material between distributed bare optical fibers and bare optical gratings and component should choose strain transfer ratio
Agent.For the performance for ensuring fiber-optic grating sensor strain measurement superior function can be tested and carry out the preferred of bonding layer material.It is whole
Individual optical fiber need to only bond distributed bare optical fibers and bare optical gratings part, and whole optical fiber forms the point bonding at grating, used as signal transmission
Fiber section is in addition to particular condition without bonding.
The present invention is suitable for the ancient architecture building structure of ambient stable；And suitable for narrow space or irregular structure component
In monitoring；It is applied to component complexity simultaneously and goes sightseeing frequently, it is desirable to which monitoring damages slight ancient building structural elements (for example
Pattern is exquisite, decorative pattern is complicated wooden frame or pin) in.Therefore the present invention has as a kind of structure health monitoring method suitable for some
In the building structure of specific monitoring requirements.
In sum, the embodiment of the present invention has the following advantages compared with existing ancient building health monitor method：
(1) bare optical fibers and bare optical gratings are used as Fibre Optical Sensor, with light weight, small volume, sensitivity is high, corrosion-resistant, anti-electromagnetism
The advantages of interference, bare optical fibers and bare optical gratings sensor is high compared to substrate formula Fibre Optical Sensor strain sensitivity, strain transfer ratio is high, can
It is applied in narrow space or irregular structure monitoring and maintenance cost is low in low cost of manufacture useful life, is not only tied for original
Structure component does not cause to damage substantially and naked eyes are difficult to observe the sensor of placement.
Ordinary optic fibre external diameter is 250 microns, can obtain the undetectable signal of traditional sensors, such as inside of composite
Stress；Sensitivity is high:Fibre Optical Sensor Bian optical principles, generally micron dimension.Using wavelength-modulation technique, resolution ratio can
Up to the nanometer scale of wavelength dimension；It is corrosion-resistant:Because the coat of optical fiber surface is made up of macromolecular material, the chemistry such as acid and alkali-resistance
Erosiveness is strong, while fibre core is from as earth silicon material, its physics, chemical equistability are strong；Electromagnetism interference:Optical signal
When transmitting in a fiber, will not be acted with electromagnetic field, thus signal anti-electromagnetic interference capability in transmitting procedure is very strong；Pass
Defeated bandwidth:The real-time measurement of Large Copacity signal can be carried out, is easy to integrated large-scale monitoring system；Distributed or quasi-distributed survey
Amount:Can be tradition machinery class, electronics with space multiple spot in an optical fiber measurement structure or unlimited multivariant parameter distribution
What the devices such as class, microelectronics class cannot be realized；Maintenance cost is low in useful life.
(2) compared to the fiber-optic grating sensor of substrate formula, bare optical fibers and bare optical gratings linear sensor is good, and sensitivity is higher, moves
State response characteristic is good, disclosure satisfy that ancient building structural elements monitoring site of deployment stress, the measurement demand of strain.The health monitoring
Method can be used for the monitoring of ancient building structure temperature, high temperature alarm, the generation of fire preventing.
(3) for the exquisite complicated beam column component of some patterns, the Fibre Optical Sensor using distributed substrate formula is easily right
Landmark causes certain damage, and only needing to a filament using bare optical fibers and bare optical gratings sensor just can complete multiple measuring points
Strain controlling, precisely reliable, application cost is low for monitoring, and any damage will not be produced for original structure component, easy construction, in addition
Also ancient building outward appearance will not be had any impact, does not interfere with visitor's sightseeing.
(4) bare optical fibers and bare optical gratings characteristic sensor is distinct, engineering adaptability clearly, for ambient stable, narrow space or not
Regular texture monitoring has application value higher.
One of ordinary skill in the art will appreciate that：Accompanying drawing is the schematic diagram of one embodiment, module in accompanying drawing or
Flow is not necessarily implemented necessary to the present invention.
Each embodiment in this specification is described by the way of progressive, identical similar portion between each embodiment
Divide mutually referring to what each embodiment was stressed is the difference with other embodiment.Especially for device or
For system embodiment, because it is substantially similar to embodiment of the method, so describing fairly simple, related part is referring to method
The part explanation of embodiment.Apparatus and system embodiment described above is only schematical, wherein the conduct
Separating component explanation unit can be or may not be it is physically separate, the part shown as unit can be or
Person may not be physical location, you can with positioned at a place, or can also be distributed on multiple NEs.Can be with root
Some or all of module therein is factually selected the need for border to realize the purpose of this embodiment scheme.Ordinary skill
Personnel are without creative efforts, you can to understand and implement.
The above, the only present invention preferably specific embodiment, but protection scope of the present invention is not limited thereto,
Any one skilled in the art the invention discloses technical scope in, the change or replacement that can be readily occurred in,
Should all be included within the scope of the present invention.Therefore, protection scope of the present invention should be with scope of the claims
It is defined.
Claims (6)
1. a kind of method that application distribution formula bare optical fibers and bare optical gratings carry out building structure health monitoring, it is characterised in that including：
Monitoring point is selected in the component surface of building structure, fiber arrangement path is set according to all of monitoring point, in the light
Laying optical fiber in fine deposition path；
Distributed bare optical fibers and bare optical gratings sensor, the distributed bare optical fibers and bare optical gratings sensor and the prison are set on the optical fiber
Measuring point correspondence；
By all distributed bare optical fibers and bare optical gratings sensor network consistings, by the distributed bare optical fibers and bare optical gratings sensor senses and
Record the temperature and strain variation of the building structure.
2. method according to claim 1, it is characterised in that the optical fiber is bare fibre, the fiber-optic grating sensor
It is bare optical fibers and bare optical gratings.
3. method according to claim 2, it is characterised in that monitoring point quantity and monitoring point according to structural elements it
Between distance parameter, the Bragg grating with corresponding monitoring point identical parameters is scribed on the distributed bare fibre.
4. method according to claim 1, it is characterised in that the monitoring point includes Deformation control monitoring point and temperature control
Monitoring point processed.
5. the method according to Claims 2 or 3 or 4, it is characterised in that using adhesive by the distributed bare fibre light
Grid are adhesively fixed in the corresponding component at monitoring point with building structure.
6. method according to claim 5, it is characterised in that whole optical fiber only bonds bare optical fibers and bare optical gratings part, used as letter
Number transmission the other parts in addition to bare optical fibers and bare optical gratings part without bond.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710090738.5A CN106918294A (en) | 2017-02-20 | 2017-02-20 | The method that application distribution formula bare optical fibers and bare optical gratings carry out building structure health monitoring |
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| CN201710090738.5A CN106918294A (en) | 2017-02-20 | 2017-02-20 | The method that application distribution formula bare optical fibers and bare optical gratings carry out building structure health monitoring |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113588119A (en) * | 2021-06-29 | 2021-11-02 | 中国船舶重工集团公司第七一五研究所 | Method for measuring wall temperature of high-temperature part of aircraft engine based on femtosecond fiber bragg grating sensing |
| CN117968559A (en) * | 2024-03-28 | 2024-05-03 | 四川省安全科学技术研究院 | Emergency monitoring method for collapse of steel-concrete building structure under fire disaster |
| CN117968559B (en) * | 2024-03-28 | 2024-06-04 | 四川省安全科学技术研究院 | Emergency monitoring method for collapse of steel-concrete building structure under fire disaster |
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| CN101397903A (en) * | 2008-11-05 | 2009-04-01 | 大庆油田有限责任公司 | Method for monitoring sleeve circumferential strain by using optical fibre grating sensor |
| CN201382778Y (en) * | 2009-04-22 | 2010-01-13 | 东南大学 | Measuring transducer used for simultaneously measuring strain and temperature of fiber grating |
| CN201561828U (en) * | 2009-12-08 | 2010-08-25 | 中国地质科学院探矿工艺研究所 | Fiber grating geological disaster monitor |
| KR20120028462A (en) * | 2010-09-15 | 2012-03-23 | 안신환 | Fiber bragg grating sensor package measuring strain of concrete structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101397903A (en) * | 2008-11-05 | 2009-04-01 | 大庆油田有限责任公司 | Method for monitoring sleeve circumferential strain by using optical fibre grating sensor |
| CN201382778Y (en) * | 2009-04-22 | 2010-01-13 | 东南大学 | Measuring transducer used for simultaneously measuring strain and temperature of fiber grating |
| CN201561828U (en) * | 2009-12-08 | 2010-08-25 | 中国地质科学院探矿工艺研究所 | Fiber grating geological disaster monitor |
| KR20120028462A (en) * | 2010-09-15 | 2012-03-23 | 안신환 | Fiber bragg grating sensor package measuring strain of concrete structure |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113588119A (en) * | 2021-06-29 | 2021-11-02 | 中国船舶重工集团公司第七一五研究所 | Method for measuring wall temperature of high-temperature part of aircraft engine based on femtosecond fiber bragg grating sensing |
| CN117968559A (en) * | 2024-03-28 | 2024-05-03 | 四川省安全科学技术研究院 | Emergency monitoring method for collapse of steel-concrete building structure under fire disaster |
| CN117968559B (en) * | 2024-03-28 | 2024-06-04 | 四川省安全科学技术研究院 | Emergency monitoring method for collapse of steel-concrete building structure under fire disaster |
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