CN108716933A - Clipping optical fibre Bragg optical grating strain and crack sensing device - Google Patents
Clipping optical fibre Bragg optical grating strain and crack sensing device Download PDFInfo
- Publication number
- CN108716933A CN108716933A CN201810643127.3A CN201810643127A CN108716933A CN 108716933 A CN108716933 A CN 108716933A CN 201810643127 A CN201810643127 A CN 201810643127A CN 108716933 A CN108716933 A CN 108716933A
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- grating
- optical
- fiber bragg
- clipping
- sensing device
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 31
- 230000003287 optical effect Effects 0.000 title claims abstract description 16
- 239000000835 fiber Substances 0.000 claims abstract description 29
- 239000000853 adhesive Substances 0.000 claims abstract description 7
- 230000001070 adhesive effect Effects 0.000 claims abstract description 7
- 230000004992 fission Effects 0.000 claims description 3
- 238000005538 encapsulation Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 2
- 230000008569 process Effects 0.000 abstract description 2
- 230000004083 survival effect Effects 0.000 abstract description 2
- 238000012544 monitoring process Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000004899 motility Effects 0.000 description 1
- 230000035772 mutation Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optical Transform (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention discloses a kind of clipping optical fibre Bragg optical grating strain and crack sensing devices, including fiber bragg grating, it is arranged inside capillary tubing, and the capillary tubing both ends are connected with hold assembly, and the fiber bragg grating connects fiber Bragg grating (FBG) demodulator by single mode optical fiber.The present invention is not high to adhesive quality requirements, effectively reduce the strain slippages in sensing process, survival rate is high simultaneously, the shortcomings that the present invention overcomes clipping encapsulation, eliminate the multi-peak phenomenon of signal, simultaneously gauge length it is adjustable, it is solderable, can rivet, it is easy to use, it can be achieved that quasi-distributed sensing.
Description
Technical field
The present invention relates to photoelectron test and monitoring structural health conditions devices, and in particular to a kind of clipping optical fiber Bragg light
Grid strain and crack sensing device.
Background technology
Concrete receives the blueness of engineering circles due to its firm durable, compression strength is high and good plasticity the advantages that
It looks at, has been widely used in various heavy constructions.But its tensile strength is low, easy to crack, especially in large volumes such as dam, bridges
In concrete, crack there are very universal.Crack can reduce the intensity of structure, reduce the service life of engineering, or even can endanger
And the normal operation of engineering.Reinforcement structure damage check, monitoring pay attention to non-destructive tests, diagnosis, to the timely hair of security risk
Existing, mutation accident science strick precaution etc. is of great significance.For the mass concrete engineerings such as concrete dam, damage
Appearance have the characteristics that space-time randomness and concealment, to damage germinating, development identification, monitoring bring great difficulty.
In this context, fiber Bragg grating sensor is just becoming a research hotspot in health monitoring field.In recent years, some
Researcher proposes the macrostrain using long gauge length optical fibre Bragg optical grating sensor measurement structure.Long gauge length optical fibre Bragg optical grating
Sensor has potential advantages outstanding, such as insensitive to stress concentration, can obtain structure overall permanence, can be applied to difference
Topological structure or network.However, between brittleness optical fiber and extensive concrete construction environment, there are contradictions.Tube-packaged optical fiber light
Gate sensor is although simple in structure, but has strain slippages, and cannot achieve welding installation, it has not been convenient to engineer application.Folder
It is welded or riveted although the sensor for holding formula encapsulation can be realized, and more caused by unresolved adhesive contact fiber grating region
Peak phenomenon.
Invention content
Goal of the invention：The object of the present invention is to provide a kind of clipping optical fibre Bragg optical grating strains and crack sensing to fill
It sets, solution strain slippages are big, the problem of signal multi-peak phenomenon, inconvenience welding installation easily occur.
Technical solution：A kind of clipping optical fibre Bragg optical grating strain and crack sensing device, including optical fiber Bragg light
Grid are arranged inside capillary, and the both ends of the capillary and fiber bragg grating are respectively connected with hold assembly, the folder
The first card slot for being provided among component and being adapted to fiber bragg grating is held, first card slot both sides are provided with and capillary
Second card slot of adaptation, the fiber bragg grating connect fiber Bragg grating (FBG) demodulator by single mode optical fiber.
In order to realize that quasi-distributed sensing, the fiber bragg grating include that the different gratings of several head and the tail connections are normal
Several fiber bragg gratings.
In order to make adhesive non-contacting fiber grating region, signal multi-peak phenomenon, the fiber bragg grating are eliminated
It is adhered and fixed by an adhesive between capillary tubing.
In order to make capillary have enough rigidity, the extruding of coarse aggregate in concrete is amenable to without excessive change
Shape, to protect optical fiber and ensure optical fiber not by lateral compression, the capillary is capillary tubing.
It is installed in order to facilitate dismounting, the fission that the hold assembly is bolted by two is constituted.
Advantageous effect：The present invention is not high to adhesive quality requirements, and damage is transmitted in the strain effectively reduced in sensing process
The shortcomings that consumption, while survival rate height, the present invention overcomes clipping encapsulation, eliminate the multi-peak phenomenon of signal, while gauge length
It is adjustable, solderable, can rivet, it is easy to use, it can be achieved that quasi-distributed sensing.
Description of the drawings
Fig. 1 is the connection diagram of each component of the present invention；
Fig. 2 is capillary tubing of the present invention and hold assembly part-structure schematic diagram；
Fig. 3 is the structural schematic diagram of hold assembly of the present invention；
Fig. 4 is strain-stretching displacement curve graph of the present invention and traditional strain transducer；
Fig. 5 is strain-grating wavelength variable quantity curve graph of the present invention and traditional strain transducer.
Specific implementation mode
Invention is further explained below in conjunction with the accompanying drawings.
As shown in Figs. 1-2, clipping optical fibre Bragg optical grating strain and crack sensing device, including fiber bragg grating
1, it is arranged inside capillary tubing 2, capillary tubing 2 and 1 both ends of fiber bragg grating are respectively connected with hold assembly 4, optical fiber
Bragg grating 1 passes through capillary tubing 2, grating position center to be located in the middle part of 2 axis direction of capillary tubing, fine Bragg grating 1
The fiber bragg grating of different grating constants including several head and the tail connections, forms quasi-distributed optical fiber Bragg grating,
The fission that hold assembly 4 is bolted by two is constituted, and fiber bragg grating connects fiber grating by single mode optical fiber 5
(FBG) demodulator 6.Binder is adhered and fixed by an adhesive between fiber bragg grating and capillary tubing must not cover optical fiber Bradley
Lattice grating position, hold assembly 4 are reliably fixed with 2 both ends of capillary tubing, and are ensured in the case where waiting for the effect of sensing element external tensile force
Without Relative sliding between capillary tubing.
When using the present invention, hold assembly is fixed in the parts to be tested using welding or riveting, and in corresponding position
Precision resister foil gauge and bare optical fibers and bare optical gratings are pasted, then the parts to be tested is carried out to continuously elongated examination on universal testing machine
It tests, being carried out at the same time data using fiber Bragg grating (FBG) demodulator and deformeter synchronous acquires, respectively to foil gauge, optical fiber cloth
Strain-stretching displacement of glug grating, the clipping optical fibre Bragg optical grating strain based on tube-packaged and crack sensing device
Curve is compared.The results are shown in Figure 4, it is seen that three's measurement result is almost the same, and strain-stretching displacement curve is basic
It is linear, shows that present invention sensing effect is preferable, as a result reliably.
Clipping optical fibre Bragg optical grating strain and crack sensing to fiber bragg grating, based on tube-packaged respectively
Grating wavelength variable quantity-strain curve of device is compared.The results are shown in Figure 5, it is seen that and the two result is almost the same,
Grating wavelength variable quantity-strain curve is substantially linear, shows that the present invention is deposited in raising traditional fiber Bragg grating sensor
It ensure that its sensing capabilities while motility rate.
Claims (5)
1. a kind of clipping optical fibre Bragg optical grating strain and crack sensing device, which is characterized in that including optical fiber Bragg light
Grid (1), setting is internal in capillary (2), and the both ends of the capillary (2) and fiber bragg grating (1) are respectively connected with folder
It holds component (4), is provided with the first card slot being adapted to fiber bragg grating (1) among the hold assembly (4), described first
Card slot both sides are provided with the second card slot being adapted to capillary (2), and the fiber bragg grating (1) passes through single mode optical fiber (5)
Connect fiber Bragg grating (FBG) demodulator (6).
2. clipping optical fibre Bragg optical grating strain according to claim 1 and crack sensing device, which is characterized in that institute
State the fiber bragg grating that fiber bragg grating (1) includes the different grating constants of several head and the tail connections.
3. clipping optical fibre Bragg optical grating strain according to claim 1 and crack sensing device, which is characterized in that institute
It states and is adhered and fixed by an adhesive between fiber bragg grating (1) both sides and capillary (2).
4. clipping optical fibre Bragg optical grating strain according to claim 1 and crack sensing device, which is characterized in that institute
It is capillary tubing to state capillary (2).
5. clipping optical fibre Bragg optical grating strain according to claim 1 and crack sensing device, which is characterized in that institute
The fission that hold assembly (4) is bolted by two is stated to constitute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810643127.3A CN108716933A (en) | 2018-06-20 | 2018-06-20 | Clipping optical fibre Bragg optical grating strain and crack sensing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810643127.3A CN108716933A (en) | 2018-06-20 | 2018-06-20 | Clipping optical fibre Bragg optical grating strain and crack sensing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108716933A true CN108716933A (en) | 2018-10-30 |
Family
ID=63913190
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810643127.3A Pending CN108716933A (en) | 2018-06-20 | 2018-06-20 | Clipping optical fibre Bragg optical grating strain and crack sensing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108716933A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109579725A (en) * | 2018-12-24 | 2019-04-05 | 南京东智安全科技有限公司 | A kind of long gauge length strain transducer of high-temperature flexible, manufacturing method and application |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101140160A (en) * | 2007-10-19 | 2008-03-12 | 大连理工大学 | Encapsulation method for optical fibre grating add-and-subtract quick strain sensor |
| CN101675315A (en) * | 2007-02-19 | 2010-03-17 | 霍廷格-鲍德温测量技术设备公司 | Optical strain gauge |
| CN102297706A (en) * | 2011-05-24 | 2011-12-28 | 黄堃 | Fiber bragg grating sensor with metal packaging and manufacturing method thereof |
| CN103383246A (en) * | 2012-05-04 | 2013-11-06 | 电子科技大学 | High-sensitivity fiber Bragg grating strain sensor |
| CN208547374U (en) * | 2018-06-20 | 2019-02-26 | 河海大学 | Clipping optical fibre Bragg optical grating strain and crack sensing device |
-
2018
- 2018-06-20 CN CN201810643127.3A patent/CN108716933A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101675315A (en) * | 2007-02-19 | 2010-03-17 | 霍廷格-鲍德温测量技术设备公司 | Optical strain gauge |
| CN101140160A (en) * | 2007-10-19 | 2008-03-12 | 大连理工大学 | Encapsulation method for optical fibre grating add-and-subtract quick strain sensor |
| CN102297706A (en) * | 2011-05-24 | 2011-12-28 | 黄堃 | Fiber bragg grating sensor with metal packaging and manufacturing method thereof |
| CN103383246A (en) * | 2012-05-04 | 2013-11-06 | 电子科技大学 | High-sensitivity fiber Bragg grating strain sensor |
| CN208547374U (en) * | 2018-06-20 | 2019-02-26 | 河海大学 | Clipping optical fibre Bragg optical grating strain and crack sensing device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109579725A (en) * | 2018-12-24 | 2019-04-05 | 南京东智安全科技有限公司 | A kind of long gauge length strain transducer of high-temperature flexible, manufacturing method and application |
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