CN208547374U - 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
- CN208547374U CN208547374U CN201820958619.7U CN201820958619U CN208547374U CN 208547374 U CN208547374 U CN 208547374U CN 201820958619 U CN201820958619 U CN 201820958619U CN 208547374 U CN208547374 U CN 208547374U
- Authority
- CN
- China
- Prior art keywords
- grating
- optical
- fiber bragg
- clipping
- sensing device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Length Measuring Devices By Optical Means (AREA)
- Optical Transform (AREA)
Abstract
The utility model 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 utility model is not high to adhesive quality requirements, effectively reduce the strain slippages in sensing process, survival rate is high simultaneously, the utility model overcomes the shortcomings that clipping encapsulation, eliminate the multi-peak phenomenon of signal, simultaneously gauge length it is adjustable, it is solderable, can rivet, be easy to use, it can be achieved that quasi-distributed sensing.
Description
Technical field
The utility model relates to photoelectron test and monitoring structural health conditions devices, and in particular to a kind of clipping optical fiber Bradley
Lattice grating strain and crack sensing device.
Background technique
Concrete is due to its firm durable, compression strength is high and good plasticity the advantages that by the blueness of engineering circles
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 prevention 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 to utilize the macrostrain of 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
Although gate sensor structure is simple, strain slippages are had, 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.
Utility model content
Purpose of utility model: the purpose of the utility model is to provide a kind of clipping optical fibre Bragg optical grating strain and cracks
Sensing device, 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 two 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 quasi-distributed sensing, the fiber bragg grating includes 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 guarantee optical fiber not by lateral compression, the capillary is capillary tubing.
In order to facilitate disassembly installation, the fission that the hold assembly is bolted by two is constituted.
The utility model has the advantages that the utility model is not high to adhesive quality requirements, the strain effectively reduced in sensing process is passed
It passs loss, while the shortcomings that survival rate is high, and the utility model overcomes clipping encapsulation, eliminating the multi-peak phenomenon of signal,
Simultaneously gauge length it is adjustable, it is solderable, can rivet, be easy to use, it can be achieved that quasi-distributed sensing.
Detailed description of the invention
Fig. 1 is the connection schematic diagram of each component of the utility model；
Fig. 2 is the utility model capillary tubing and hold assembly partial structure diagram；
Fig. 3 is the structural schematic diagram of the utility model hold assembly；
Fig. 4 is the strain-stretching displacement curve graph of the utility model and traditional strain transducer；
Fig. 5 is the strain-grating wavelength variable quantity curve graph of the utility model and traditional strain transducer.
Specific embodiment
The utility model is further described with reference to the accompanying drawing.
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, and grating position center is 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 under to the effect of sensing element external tensile force
Without Relative sliding between capillary tubing.
When the utility model is used, hold assembly is fixed in the parts to be tested using welding or riveting, and corresponding
Precision resister foil gauge and bare optical fibers and bare optical gratings are pasted in position, then carry out the parts to be tested on universal testing machine continuously elongated
Test carries out data acquisition simultaneously using fiber Bragg grating (FBG) demodulator and deformeter synchronous, respectively corresponds and become piece, optical fiber
The strain of Bragg grating, the clipping optical fibre Bragg optical grating strain based on tube-packaged and crack sensing device-stretching position
Curve is moved to be compared.As a result as shown in Figure 4, it is seen that three's measurement result is almost the same, strain-stretching displacement curve base
This be it is linear, show the utility model sense effect it 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.As a result as shown in Figure 5, it is seen that the two result is almost the same,
Grating wavelength variable quantity-strain curve is substantially linear, shows that the utility model is improving traditional fiber Bragg grating sensing
It ensure that its sensing capabilities while device survival 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 two 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)
It connects 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) two 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
Stating capillary (2) is capillary tubing.
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 |
|---|---|---|---|
| CN201820958619.7U CN208547374U (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 |
|---|---|---|---|
| CN201820958619.7U CN208547374U (en) | 2018-06-20 | 2018-06-20 | Clipping optical fibre Bragg optical grating strain and crack sensing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208547374U true CN208547374U (en) | 2019-02-26 |
Family
ID=65423106
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820958619.7U Active CN208547374U (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) | CN208547374U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108716933A (en) * | 2018-06-20 | 2018-10-30 | 河海大学 | Clipping optical fibre Bragg optical grating strain and crack sensing device |
| CN113310423A (en) * | 2021-04-25 | 2021-08-27 | 东南大学 | Crack sensing system and method based on distributed short-gauge-length optical fiber strain sensor |
-
2018
- 2018-06-20 CN CN201820958619.7U patent/CN208547374U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108716933A (en) * | 2018-06-20 | 2018-10-30 | 河海大学 | Clipping optical fibre Bragg optical grating strain and crack sensing device |
| CN113310423A (en) * | 2021-04-25 | 2021-08-27 | 东南大学 | Crack sensing system and method based on distributed short-gauge-length optical fiber strain sensor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100578143C (en) | Optical fibre displacement transducer | |
| CN201331395Y (en) | Fibre grating temperature compensation transducer | |
| CN208547374U (en) | Clipping optical fibre Bragg optical grating strain and crack sensing device | |
| CN203337111U (en) | Hoop type optical fiber grating reinforcement meter | |
| CN200962030Y (en) | Non enhanced optical fiber grating reinforcing steel bar device | |
| CN103383246A (en) | High-sensitivity fiber Bragg grating strain sensor | |
| CN103940359A (en) | Fiber grating differential strain gauge and manufacturing and using method thereof | |
| CN109827839A (en) | Ceramic matric composite inside strands Mechanics Performance Testing device and test method | |
| CN110542385A (en) | Symmetrical wide-range fiber grating displacement sensor | |
| CN201155966Y (en) | Optical fibre grating displacement meter | |
| CN203465450U (en) | Strain and temperature dual-parameter optical cable | |
| CN108716933A (en) | Clipping optical fibre Bragg optical grating strain and crack sensing device | |
| CN103017973B (en) | High-temperature resistant micropressure optical fiber grating sensor | |
| CN102878937A (en) | Integrated displacement and angle sensor with fiber Bragg gratings | |
| CN203337110U (en) | Sleeve type optical fiber grating reinforcement meter | |
| CN202083500U (en) | Resistance type double-flange torque sensor | |
| CN106323767B (en) | Bolt shearing resistance testing device | |
| CN202869443U (en) | Integrated displacement and rotation angle sensor with fiber Bragg gratings | |
| CN103528733A (en) | Spindle-shaped sensor for monitoring load and temperature of flexible rope in real time | |
| CN206037977U (en) | Fracture width changes dynamic monitoring device based on response of meeting an emergency | |
| CN203688111U (en) | Steel strand stress measurement device for prestressed concrete | |
| CN102628673A (en) | Armor optical fiber sensor suitable for road structure full size monitoring | |
| CN202692951U (en) | Fiber bragg grating bending sensor for monitoring stress deformation of flexible protective screen | |
| CN209690557U (en) | A kind of intelligent fiber plate of compound multi-core optical fiber | |
| CN105403333B (en) | Bridge pad elastomer load force measuring method and support elastomer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |