CN202690096U - Fiber bragg grating force-measuring anchor rod - Google Patents
Fiber bragg grating force-measuring anchor rod Download PDFInfo
- Publication number
- CN202690096U CN202690096U CN 201220312763 CN201220312763U CN202690096U CN 202690096 U CN202690096 U CN 202690096U CN 201220312763 CN201220312763 CN 201220312763 CN 201220312763 U CN201220312763 U CN 201220312763U CN 202690096 U CN202690096 U CN 202690096U
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- bragg grating
- fiber bragg
- measuring
- anchor rod
- fiber
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Abstract
The utility model relates to a fiber bragg grating force-measuring anchor rod, which comprises an anchor rod, fiber bragg grating strain sensors, optical fibers, measuring interfaces, a protective shell, an end cover and a fiber bragg grating data acquisition system, wherein the fiber bragg grating strain sensors are arranged in longitudinal grooves on two sides of the anchor rod; the measuring interfaces are formed in the protective shell; the protective shell is welded to the top of the anchor rod; the fiber bragg grating strain sensors are connected with the measuring interfaces and the fiber bragg grating data acquisition system sequentially by the optical fibers; and the end cover covers the protective shell. The fiber bragg grating force-measuring anchor rod is convenient to install and easy to operate, has the advantages of high antijamming capability, high measuring accuracy and the like, and can be widely applied to the fields of underground construction of water conservancy, traffics, mines and the like.
Description
Technical field
The utility model relates to a kind of dynamometric system, particularly a kind of fiber grating force-measuring anchor stock for geotechnical engineering fields such as mines.
Background technology
Anchor pole is widely used in the geotechnical engineering fields such as coal roadway support, slope reinforcement, tunnel support, measure its in use stressed to optimal design parameter, to improve construction technology etc. significant.The load-bearing monitor of anchor pole is mainly realized by the resistance-strain type of dynamometer anchor pole at present, it is 02255332.0 patent such as application number, a kind of direct-reading tension-measuring anchor rod is disclosed, but force-measuring anchor stock adopts the screw-thread steel of unified specification as the body of rod, in mechanical property certain difference is arranged with the anchor pole that uses in the engineering, the stressing conditions that can not reflect comparatively really anchor pole in the engineering, and the antijamming capability of the sensor of its use is not strong, stability is not high, and sensitivity is low, certainty of measurement is not high.Fiber grating sensing technology is a kind of brand-new sensing technology that emerges along with the development of Fabrication Methods of Fiber Gratings, its sensor has the advantages such as anti-electromagnetic interference, anticorrosive, electric insulation, high sensitivity, and high temperature resistant, high pressure, safe and reliable, have broad application prospects.Fiber grating sensing technology not yet has the application precedent aspect anchor rod force-measuring at present.
The utility model content
The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art, and the fiber grating that a kind of antijamming capability is strong, certainty of measurement is high, safe and reliable force-measuring anchor stock is provided.
For achieving the above object, the utility model adopts following technical proposals:
A kind of fiber grating force-measuring anchor stock comprises anchor pole, fiber Bragg grating strain sensor, optical fiber, test interface, protecting sheathing, end cap, fiber grating data collecting system; Described fiber Bragg grating strain sensor is installed in the longitudinal fluting of anchor pole both sides; Described test interface is installed in the protecting sheathing; Described protecting sheathing is welded in the anchor pole top; Described fiber Bragg grating strain sensor is connected with the fiber grating data collecting system with test interface successively by optical fiber; Described end cap covers on protecting sheathing.
Anchor pole is selected employed anchor pole in the Practical Project.
The using method of fiber grating force-measuring anchor stock is: at first, the body of rod both sides of the anchor pole that engineering is used of using at dynamometric system process respectively a longitudinal fluting, then fiber Bragg grating strain sensor is installed in the longitudinal fluting, simultaneously protecting sheathing is welded on anchor pole one end; After dynamometric system is installed on the anchor pole, rockbolt installation is fixed in the rock mass in the boring of rock mass and by Anchor Agent, test interface is connected with the fiber grating data collecting system, then obtain the strain variation value of fiber-optic grating sensor in the work progress by the data collecting system monitoring, according to the Laboratory Calibration result, finally obtain the magnitude of load of anchor pole in work progress and change again.
The utility model has the following advantages than prior art:
(1) the utility model simple installation, and easy operating can be widely used in the underground engineering field such as water conservancy, traffic, mine;
(2) the utility model directly is installed in the Practical Project on the employed anchor pole, compares with the simple use screw-thread steel of traditional force-measuring anchor stock as the body of rod, and it more meets engineering reality, the data of surveying more can reflect really the stressing conditions of other anchor pole in the engineering;
(3) the utility model using optical fibre grating strain transducer is as measuring cell, than traditional anchor rod force-measuring technology, has higher certainty of measurement, and antijamming capability is strong, the accuracy of the data of surveying is high, under the conditions such as high temperature, high pressure, also can work, can be applicable to the abominable engineering of environment.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment.
Fig. 2 is the use schematic diagram of the utility model embodiment.
Wherein: 1-anchor pole; 2-fiber Bragg grating strain sensor; 3-optical fiber; 4-test interface; 5-protecting sheathing; 6-end cap; 7-fiber grating data collecting system; 8-boring; 9-Anchor Agent.
The specific embodiment
Below in conjunction with drawings and Examples the utility model is described in further details.
Among Fig. 1 and Fig. 2, a kind of fiber grating force-measuring anchor stock comprises anchor pole 1, fiber Bragg grating strain sensor 2, optical fiber 3, test interface 4, protecting sheathing 5, end cap 6, fiber grating data collecting system 7; Described fiber Bragg grating strain sensor 2 is installed in the anchor pole 1 both sides longitudinal fluting; Described test interface 4 is installed in the protecting sheathing; Fiber Bragg grating strain sensor 2 is connected with the fiber grating data collecting system with test interface 4 successively by optical fiber 3 and is connected; Described protecting sheathing 5 is welded in anchor pole 1 top; Described end cap 6 covers on protecting sheathing 5.
Using method of the present utility model is: at first, the body of rod both sides of the anchor pole that engineering is used 1 of using at dynamometric system process respectively a longitudinal fluting, then fiber Bragg grating strain sensor 2 is installed in the longitudinal fluting, simultaneously protecting sheathing 5 is welded on anchor pole 1 one ends; After dynamometric system is installed on the anchor pole 1, be installed to anchor pole 1 in the boring 8 and be fixed in the rock mass by Anchor Agent 9, test interface 4 is connected with fiber grating data collecting system 7, then obtain the strain variation value of fiber-optic grating sensor 2 in the work progress by data collecting system 7 monitorings, according to the Laboratory Calibration result, finally obtain the magnitude of load of anchor pole 1 in work progress and change again.
As known by the technical knowledge, the utility model can be realized by other the embodiment that does not break away from its Spirit Essence or essential feature.Therefore, with regard to each side, all just illustrating, is not only.All in the utility model scope or the change that is being equal in the scope of the present utility model all be included in the utility model.
Claims (1)
1. a fiber grating force-measuring anchor stock is characterized in that: be comprised of anchor pole, fiber Bragg grating strain sensor, optical fiber, test interface, protecting sheathing, end cap, fiber grating data collecting system; Described fiber Bragg grating strain sensor is installed in the longitudinal fluting of anchor pole both sides; Described test interface is installed in the protecting sheathing; Described protecting sheathing is welded in the anchor pole top; Described fiber Bragg grating strain sensor is connected with the fiber grating data collecting system with test interface successively by optical fiber; Described end cap covers on protecting sheathing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220312763 CN202690096U (en) | 2012-06-29 | 2012-06-29 | Fiber bragg grating force-measuring anchor rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220312763 CN202690096U (en) | 2012-06-29 | 2012-06-29 | Fiber bragg grating force-measuring anchor rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202690096U true CN202690096U (en) | 2013-01-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220312763 Expired - Fee Related CN202690096U (en) | 2012-06-29 | 2012-06-29 | Fiber bragg grating force-measuring anchor rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202690096U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102809454A (en) * | 2012-06-29 | 2012-12-05 | 山东大学 | FBG (Fiber Bragg Grating) force measuring anchor rod and using method |
| CN104062363A (en) * | 2014-06-20 | 2014-09-24 | 山东大学 | Double fiber bragg grating sensor for rock bolt anchoring quality test |
-
2012
- 2012-06-29 CN CN 201220312763 patent/CN202690096U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102809454A (en) * | 2012-06-29 | 2012-12-05 | 山东大学 | FBG (Fiber Bragg Grating) force measuring anchor rod and using method |
| CN104062363A (en) * | 2014-06-20 | 2014-09-24 | 山东大学 | Double fiber bragg grating sensor for rock bolt anchoring quality test |
| CN104062363B (en) * | 2014-06-20 | 2016-08-17 | 山东大学 | A kind of double optical fiber grating sensor for Detection of Bolt Bonding Integrity detection |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130123 Termination date: 20150629 |
|
| EXPY | Termination of patent right or utility model |