CN203069150U - Novel fiber bragg grating strain meter - Google Patents
Novel fiber bragg grating strain meter Download PDFInfo
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- CN203069150U CN203069150U CN 201320029537 CN201320029537U CN203069150U CN 203069150 U CN203069150 U CN 203069150U CN 201320029537 CN201320029537 CN 201320029537 CN 201320029537 U CN201320029537 U CN 201320029537U CN 203069150 U CN203069150 U CN 203069150U
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- fiber grating
- bragg grating
- fiber bragg
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- strand wires
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Abstract
The utility model discloses a novel fiber bragg grating strain meter. The strain meter comprises a fiber bragg grating and steel strands. The steel strands are formed through multi-beam bundling. The multi-beam bundling steel strands wrap the fiber bragg grating. A tight packaging casing pipe is sleeved on an outer side of the fiber bragg grating. A sheath is sleeved on an outer side of the multi-beam bundling steel strands. One end of the fiber bragg grating is connected with a temperature measurement fiber bragg grating. The outer side of the temperature measurement fiber bragg grating is fixed with a protection pipe. The temperature measurement fiber bragg grating is fixed in a connection thread bushing. The one end of the connection thread bushing is fixed with the temperature measurement fiber bragg grating and the other end of the temperature measurement fiber bragg grating is fixed with the fiber bragg grating. Long-term stability and reliability of a fiber bragg grating sensor are increased and simultaneously deep rock and soil deformation measurement is satisfied.
Description
Technical field
The utility model belongs to sensor technical field, specifically is a kind of novel fiber grating strainometer.
Background technology
The more conventional electrical measurement class of fiber grating tool sensor has advantages such as anti-electromagnetic interference (EMI), corrosion-resistant, long Distance Transmission, long-time stability are good, engineering detecting with monitor in obtained widespread use.But fettered by encapsulation technology restriction and traditional sensors pattern, fiber grating strain class sensor now is to form by the encapsulation of metal section of jurisdiction substantially, and utilize elasticity transducing structure to carry out the paster encapsulation, in production and actual application, show following problem:
(1) sensor package requirement on machining accuracy height, material are special material also, and packaging technology is meticulous, so fiber-optic grating sensor packaging technology complexity, the packaging cost height.
(2) the fixed fiber-optic grating sensor long-time stability of fixed point and shock resistance are poor, because two point of fixity spacings of grating are too small, the point of fixity long-term creep is very big to the measured value influence of sensor, and the distortion range is too small, and very easily shake is disconnected.
(3) sensor is installed complexity, initial strain poor controllability.Need bearing to fix in the sensor installation process, it is very little to regulate leeway, in fixation procedure, the too tight or too loose sensor failure that makes takes place very easily.
(4) gauge length of sensor and range are too small, to heterogeneous body deformation measurements such as concrete, ground bodies, very easily make the sensor outrange lose efficacy because microfracture produces, and test data is too discrete, and regularity is not strong.
(5) the sensor boring property implanted is poor, and bore diameter is limited, and sensor is overweight and excessive, very easily wall built-up destruction and upset when drilling construction is imbedded.
Therefore in order better to be satisfied with monitorings such as concrete, ground body, ancient building, it is simple to develop packaging technology, the large-length wide range, and the easy-to-install fiber-optic grating sensor is very important.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of big novel fiber grating strainometer of survey scope that becomes.
The technical scheme that its technical matters that solves the utility model adopts is: a kind of novel fiber grating strainometer; comprise fiber grating and steel strand wires; described steel strand wires are that multi beam forms around bundle; described multi beam is the described fiber grating of parcel between the steel strand wires of pricking; the described fiber grating outside is arranged with the hard-pressed bale sleeve pipe; described multi beam also is arranged with sheath outside the steel strand wires of pricking; one end of described fiber grating is connected with the thermometric fiber grating; fixedly there is protection tube in the outside of described thermometric fiber grating; described thermometric fiber grating is fixed in the connecting thread cover; the fixing described thermometric fiber grating of one end of described connecting thread cover, the other end of described thermometric fiber grating is fixed described fiber grating.
As the further optimization of technique scheme, fix by fixed terminal between described thermometric fiber grating and the described fiber grating.
As the further optimization of technique scheme, described fixed terminal also includes outer tube, and the two ends of outer tube are thin-wall copper pipe, and outer tube is provided with external thread.
As the further optimization of technique scheme, described sheath is stainless steel sheath.
As the further optimization of technique scheme, described connecting thread cover also is provided with annular terminal.
The beneficial effect of a kind of novel fiber grating strainometer of the utility model mainly shows as:
(1) long-time stability and the reliability of lifting fiber-optic grating sensor.No metal section of jurisdiction is carried out transducing and is transformed, and grating is directly fixed stretching, promotes the stability of fiber grating test, is applicable to the long term monitoring of all kinds of engineerings.The utility model integral body is a very thin hawser in the diameter 5mm left and right sides, and xoncrete structure is not had destruction, does not also change the stress characteristic of xoncrete structure, test result fidelity height.
(2) satisfied deep ground deformation measurement.Deep ground body deformability scope is big, and is discontinuous distortion, and mounting condition is limited, and conventional sensors all can't satisfy its test request now, and the utility model can be used for deep ground body deformability monitoring, presses monitoring, seismic monitoring etc. for the ore deposit valid data are provided.
(3) highly dense intensity is laid and is measured: but the highly dense intensity encapsulation of the utility model fiber-optic grating sensor realizes the intensive laying test request of engineering body.
(4) reduce FBG sensor package cost, brought into play the technical advantage of FBG sensing more.The utility model has been given full play to the advantage that the FBG technology can be connected, and sensor is directly encapsulated string, and tortuous rolling very is convenient to install and transportation, has solved destructible, risk height and cost high-technology bottleneck problem in the popularization of FBG technology.
Description of drawings
Fig. 1 is around the lateral cross section structural representation of pricking steel strand wires parcel fiber grating among the embodiment.
Fig. 2 is the longitudinal cross-section synoptic diagram of connecting thread cover among the embodiment.
Embodiment
Below in conjunction with drawings and Examples the utility model embodiment is described:
Shown in Fig. 1-2; preferred forms as a kind of novel fiber grating strainometer of the utility model; it comprises fiber grating 1 and steel strand wires 2; described steel strand wires 2 form around bundle for multi beam; described multi beam is the described fiber grating 1 of parcel between the steel strand wires of pricking 2; described fiber grating 1 outside is arranged with hard-pressed bale sleeve pipe 3; described multi beam also is arranged with sheath 4 outside the steel strand wires of pricking 2; one end of described fiber grating 1 is connected with thermometric fiber grating 5; fixedly there is protection tube 6 in the outside of described thermometric fiber grating 5; described thermometric fiber grating 5 is fixed in the connecting thread cover 7; the fixing described thermometric fiber grating 5 of one end of described connecting thread cover 7, the other end of described thermometric fiber grating 5 is fixed described fiber grating 1.
Fixing by fixed terminal 8 between described thermometric fiber grating 5 and the described fiber grating 1.
Described fixed terminal 8 also includes outer tube, and the two ends of outer tube are thin-wall copper pipe, and outer tube is provided with external thread.
Described sheath 4 is stainless steel sheath.
Described connecting thread cover 7 also is provided with annular terminal.
In the specific implementation:
Fiber grating becomes the drawing strain transducer of fixed point by the fixed terminal of a determining deviation, the terminal fiber grating passes steel strand wires that are built-in with blank pipe, these steel strand wires are 304 stainless steel multiply ropes, elastic modulus and concrete and rock are suitable, coupling coupling with monitoring target, this steel strand wires length can be variable to several meters from tens of centimetres, be built-in with blank pipe, guarantee that fiber grating whole process is stretching, has overcome the influence of micro-crack in the monitoring target, can measure the discontinuous distortion of heterogeneous body, these steel strand wires can be crooked, the tensile strength height, and anti-country rock energy is strong, very convenient boring is imbedded, and deformation measurement is carried out in implantable ground body deep.
Adopted an inner core in the present embodiment in fixed terminal, this inner core closely contacts with optical fiber by modes such as high temperature setting glue, plated film welding, low temperature glass welding, has solved the problem that it is difficult that fiber grating is fixed a point for a long time.
Present embodiment is tainless terminal by the terminal that adopts, and lead-in wire and blank pipe twisted wire all have the plastic cement sheath, and the epoxy glue sealing is adopted in the space between terminal, makes grating and terminal and extraneous steam isolate, and has increased its long-time stability.
Present embodiment adopt to inscribe that good fiber grating string puts terminal successively and the blank pipe steel strand wires carry out packing processing, and bunchiness is very convenient, and whole fiber grating strain sensor string do not have any continuing, the tensile strength height, and it is convenient to construct.
By reference to the accompanying drawings the utility model preferred implementation has been done detailed description above, but the utility model is not limited to above-mentioned embodiment, in the ken that those of ordinary skills possess, can also under the prerequisite that does not break away from the utility model aim, make a variety of changes.
Do not break away from design of the present utility model and scope and can make many other changes and remodeling.Should be appreciated that the utility model is not limited to specific embodiment, scope of the present utility model is defined by the following claims.
Claims (2)
1. novel fiber grating strainometer; it is characterized in that; comprise fiber grating and steel strand wires; described steel strand wires are that multi beam forms around bundle; described multi beam is the described fiber grating of parcel between the steel strand wires of pricking; the described fiber grating outside is arranged with the hard-pressed bale sleeve pipe; described multi beam also is arranged with sheath outside the steel strand wires of pricking; one end of described fiber grating is connected with the thermometric fiber grating; fixedly there is protection tube in the outside of described thermometric fiber grating; described thermometric fiber grating is fixed in the connecting thread cover, the fixing described thermometric fiber grating of an end of described connecting thread cover, and the other end of described thermometric fiber grating is fixed described fiber grating.
2. a kind of novel fiber grating strainometer according to claim 1 is characterized in that, fixes by fixed terminal between described thermometric fiber grating and the described fiber grating.
3. a kind of novel fiber grating strainometer according to claim 2 is characterized in that described fixed terminal also includes outer tube, and the two ends of outer tube are thin-wall copper pipe, and outer tube is provided with external thread.
4. a kind of novel fiber grating strainometer according to claim 1 is characterized in that, described sheath is stainless steel sheath.
5. a kind of novel fiber grating strainometer according to claim 1 is characterized in that, described connecting thread cover also is provided with annular terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320029537 CN203069150U (en) | 2013-01-21 | 2013-01-21 | Novel fiber bragg grating strain meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320029537 CN203069150U (en) | 2013-01-21 | 2013-01-21 | Novel fiber bragg grating strain meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203069150U true CN203069150U (en) | 2013-07-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320029537 Expired - Lifetime CN203069150U (en) | 2013-01-21 | 2013-01-21 | Novel fiber bragg grating strain meter |
Country Status (1)
| Country | Link |
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| CN (1) | CN203069150U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103852013A (en) * | 2014-03-11 | 2014-06-11 | 桂林聚联科技有限公司 | Slip mass deep displacement sensor based on fiber bragg grating displacement detection |
| CN104048616A (en) * | 2014-06-30 | 2014-09-17 | 中国一冶集团有限公司 | Distributed optical fiber used for detecting concrete strain |
| CN104634269A (en) * | 2015-02-03 | 2015-05-20 | 中国水利水电科学研究院 | Device and method for utilizing fiber bragg grating displacement sensor to measure axial deformation of bedrock |
| CN106289091A (en) * | 2016-10-21 | 2017-01-04 | 广东核电合营有限公司 | A kind of lightweight fiber grating wide range strain gauge being applicable to microcrack structure |
-
2013
- 2013-01-21 CN CN 201320029537 patent/CN203069150U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103852013A (en) * | 2014-03-11 | 2014-06-11 | 桂林聚联科技有限公司 | Slip mass deep displacement sensor based on fiber bragg grating displacement detection |
| CN103852013B (en) * | 2014-03-11 | 2016-04-13 | 桂林聚联科技有限公司 | A kind of sliding mass deep displacement sensor based on fiber grating displacement detection |
| CN104048616A (en) * | 2014-06-30 | 2014-09-17 | 中国一冶集团有限公司 | Distributed optical fiber used for detecting concrete strain |
| CN104634269A (en) * | 2015-02-03 | 2015-05-20 | 中国水利水电科学研究院 | Device and method for utilizing fiber bragg grating displacement sensor to measure axial deformation of bedrock |
| CN104634269B (en) * | 2015-02-03 | 2017-06-06 | 中国水利水电科学研究院 | The device and method of basement rock axial deformation is measured using fiber grating displacement sensor |
| CN106289091A (en) * | 2016-10-21 | 2017-01-04 | 广东核电合营有限公司 | A kind of lightweight fiber grating wide range strain gauge being applicable to microcrack structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130717 |