CN202471318U - Fiber bragg grating force-measuring anchor rod apparatus - Google Patents
Fiber bragg grating force-measuring anchor rod apparatus Download PDFInfo
- Publication number
- CN202471318U CN202471318U CN 201220021404 CN201220021404U CN202471318U CN 202471318 U CN202471318 U CN 202471318U CN 201220021404 CN201220021404 CN 201220021404 CN 201220021404 U CN201220021404 U CN 201220021404U CN 202471318 U CN202471318 U CN 202471318U
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- optical fiber
- anchor
- bar
- measuring
- fiber
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Abstract
The utility model relates to a fiber bragg grating force-measuring anchor rod apparatus comprising an optical fiber, a rod beam, and a hollow anchor rod; the optical fiber is provided with at least a grating, the grating is stick on the rod beam, the hollow anchor rod is through-fitted with the rod beam, and an end of the rod beam is provided with a limiting stopper; one side of the hollow anchor rod is blocked by the limiting stopper, and the other side of the hollow anchor rod is provided with a fastening nut and a terminal nut; the fastening nut and the terminal nut are in threaded connection with the rod beam, the hollow anchor rod is connected with an optical fiber seat through welding, the optical fiber seat is thread-connected with an optical fiber seat cover, the optical fiber seat cover is provided with an optical fiber connecting flange, the optical fiber seat cover is thread-connected with a protection cover, and an optical fiber outlet is arranged on the protection cover. The fiber bragg grating force-measuring anchor rod apparatus utilizes the fiber bragg grating to collect deformation data of the anchor rod apparatus; and because the optical fiber itself has the advantages of good anti-lightning stroke property and strong anti-electromagnetic interference property, and is capable of measuring in long distance, reliability, measuring precision, and data transmission distance of the fiber bragg grating force-measuring anchor rod apparatus are improved.
Description
Technical field
The utility model relates to a kind of optical fiber force cell, relates in particular to a kind of fiber grating force-measuring anchor stock device.
Background technology
In engineering construction and roadway support, the long term monitoring of anchor pole device is that the focus that the boundary pays close attention to is built in domestic and international Geotechnical Engineering, drive supporting always.Traditional force-measuring anchor stock device is fluting in anchor pole device both sides, adhering resistance strain sheets, and through observing the change in resistance of foil gauge; Anchor pole device force-bearing situation is analyzed, and the anchor pole device needs charged work, because the anti-thunderbolt poor performance that electric transducer self exists; Anti-electromagnetic interference performance is low, can not long-distance transmissions etc. factor, make it have poor reliability; Measuring accuracy is not high, the defective that transmission range is short.
The utility model content
The technical matters that the utility model will solve is to increase reliability, measuring accuracy and the transmission range of force-measuring anchor stock device.
Solve the problems of the technologies described above, the utility model adopts following technical scheme:
A kind of fiber grating force-measuring anchor stock device comprises optical fiber, bar beam, hollow anchor bar, and said optical fiber is provided with at least one grating; Said grating sticks on the bar beam, and said bar beam is arranged in hollow anchor bar, and an end of said bar beam is provided with limited block; Said limited block is stuck in a side of hollow anchor bar; The opposite side of said hollow anchor bar is provided with clamp nut and end nut, said clamp nut and end nut all with the bar beam through being threaded, said hollow anchor bar is through being welded to connect fiber bench; Said fiber bench is through the optical fiber flap that is threaded; Said optical fiber flap is provided with the optical fiber joint flange, and said optical fiber flap is through the over cap that is threaded, and said over cap is provided with the optical fiber outlet.
The inner optical fiber of said anchor pole device docks through the optical fiber joint flange with external optical fiber.
Said optical fiber is provided with 4 gratings.
Described anchor pole device also comprises and is used to limit the anchor pole device not to inner anchor pole pad and the anchor nut that moves in rock stratum, and said anchor pole pad is enclosed within on the hollow anchor bar, and said anchor nut and hollow anchor bar are through being threaded.
The external diameter of said limited block is greater than the internal diameter of hollow anchor bar.
A kind of fiber grating force-measuring anchor stock device of the utility model; Changed traditional electric transducer force measuring method; The advantage that good, the anti-electromagnetic interference (EMI) of anti-thunderbolt performance that fiber grating itself is had is strong, can realize telemeasurement; Being applied to has increased reliability, measuring accuracy and the data transmission distance of force-measuring anchor stock device in the engineering force-measuring anchor stock device.
Description of drawings
Shown in Figure 1 is the whole sectional view of a kind of fiber grating force-measuring anchor stock of the utility model device.
Mark as follows among the figure: over cap 1, optical fiber flap 2, flange fixed head 3, fiber bench 4, bar beam 5; Limited block 51, anchor pole device nut 6, anchor pole device pad 7, hollow anchor bar 8, clamp nut 9; End nut 10, strain grating 11, optical fiber 12, optical fiber joint flange 13, optical fiber outlet 14.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is done and to be further described.
In the present embodiment, as shown in Figure 1, the anchor pole device main body partly comprises optical fiber 12, bar beam 5, hollow anchor bar 8; Optical fiber 12 is provided with 4 gratings 11, and the spacing of per two gratings 11 is 500mm, and each grating 11 sticks on the bar beam 5; One end of bar beam 5 is a screw thread, and the other end is a limited block 51, and the external diameter of limited block 51 is greater than the internal diameter of hollow anchor bar 8; The bar beam 5 that is pasted with grating 11 is passed hollow anchor bar 8, make limited block 51 be stuck in an end of hollow anchor bar 8, a clamp nut 9 and an end nut 10 are set at the other end of hollow anchor bar 8; Clamp nut 9 and end nut 10 all with bar beam 5 through being threaded; Under the acting in conjunction of clamp nut 9, end nut 10 and limited block 51,8 lockings are one with hollow anchor bar with bar beam 5, and optical fiber 12 stretches to limited block 51 directions along the thread end of bar beam 5; And extend out from the junction of limited block 51 with hollow anchor bar 8; When the anchor pole device received the acting force of rock stratum, bar beam 5 can produce deformation, and grating 11 is gathered the deformation data and passed through optical fiber 12 transmission.The grating 11 of other quantity can also be set according to the characteristics of tested rock stratum on the optical fiber 12 in other embodiments; According to the dynamometry position position of grating 11 and the spacing of adjacent gratings 11 are set.The utility model is that grating 11, bar beam 5 and hollow anchor bar 8 are fastened as one, and makes grating 11 can collect the acting force of rock stratum to the anchor pole device accurately.
The whole outer surface of hollow anchor bar 8 is helicitic texture, and in the junction of hollow anchor bar 8 with limited block 51, hollow anchor bar 8 is through being welded to connect fiber bench 4; Fiber bench 4 is through the optical fiber flap 2 that is threaded, and optical fiber flap 2 is provided with flange fixed head 3, and optical fiber joint flange 13 is installed on the flange fixed head 3; The built-in optical fiber 12 of anchor pole device is inserted in the optical fiber joint flange 13; Optical fiber flap 2 is through the over cap 1 that is threaded, and over cap 1 is provided with optical fiber outlet 14, and external optical fiber passes optical fiber outlet 14 and docks with optical fiber 12 through optical fiber joint flange 13; It is said that the texturing variables that grating 11 is collected is passed to the fiber grating signal analyzer; In the utility model, anchor pole device built-in fiber is connected through flange with external optical fiber, has avoided being pullled the change in location that causes internal optical fiber because of external optical fiber.
Receive the influence of rock stratum squeezing action, can produce the anchor pole device, cause the test position skew of grating 11 to the inner trend power that moves in rock stratum; In the present embodiment; Hollow anchor bar 8 when hollow anchor bar 8 passes the preset measuring position of anchor pole pad 7 insertion rock stratum, is screwed anchor nut 6 through the anchor nut 6 that is threaded; Make anchor pole pad 7 be adjacent to the rock stratum outer wall; Under the acting in conjunction of anchor nut 6, anchor pole pad 7, overcome the anchor pole device to the inner trend power that moves in rock stratum, the data deviation of avoiding the test position skew because of grating 11 to be caused.
The fiber grating force-measuring anchor stock device of the utility model; Adopt grating to gather the deformation data of anchor pole device; It is said that texturing variables is passed to the fiber grating signal analyzer of far-end through optical fiber; Obtain the force-bearing situation of fiber grating force-measuring anchor stock device through analysis, but because good, the anti-electromagnetic interference (EMI) of anti-thunderbolt performance that optical fiber itself the is had advantage of telemeasurement by force, increased reliability, measuring accuracy and the data transmission distance of this fiber grating force-measuring anchor stock device.
Claims (5)
1. a fiber grating force-measuring anchor stock device comprises optical fiber, bar beam, hollow anchor bar, and it is characterized in that: said optical fiber is provided with at least one grating; Said grating sticks on the bar beam, and said bar beam is arranged in hollow anchor bar, and an end of said bar beam is provided with limited block; Said limited block is stuck in a side of hollow anchor bar; The opposite side of said hollow anchor bar is provided with clamp nut and end nut, said clamp nut and end nut all with the bar beam through being threaded, said hollow anchor bar is through being welded to connect fiber bench; Said fiber bench is through the optical fiber flap that is threaded; Said optical fiber flap is provided with the optical fiber joint flange, and said optical fiber flap is through the over cap that is threaded, and said over cap is provided with the optical fiber outlet.
2. a kind of fiber grating force-measuring anchor stock device as claimed in claim 1, it is characterized in that: the built-in fiber of said anchor pole device docks through the optical fiber joint flange with external optical fiber.
3. a kind of fiber grating force-measuring anchor stock device as claimed in claim 1, it is characterized in that: said optical fiber is provided with 4 gratings.
4. a kind of fiber grating force-measuring anchor stock device as claimed in claim 1; It is characterized in that: also comprise being used to limit the anchor pole device not to inner anchor pole pad and the anchor nut that moves in rock stratum; Said anchor pole pad is enclosed within on the hollow anchor bar, and said anchor nut and hollow anchor bar are through being threaded.
5. a kind of fiber grating force-measuring anchor stock device as claimed in claim 1, it is characterized in that: the external diameter of said limited block is greater than the internal diameter of hollow anchor bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220021404 CN202471318U (en) | 2012-01-17 | 2012-01-17 | Fiber bragg grating force-measuring anchor rod apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220021404 CN202471318U (en) | 2012-01-17 | 2012-01-17 | Fiber bragg grating force-measuring anchor rod apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202471318U true CN202471318U (en) | 2012-10-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220021404 Expired - Fee Related CN202471318U (en) | 2012-01-17 | 2012-01-17 | Fiber bragg grating force-measuring anchor rod apparatus |
Country Status (1)
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| CN (1) | CN202471318U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103471747A (en) * | 2013-10-12 | 2013-12-25 | 青岛理工大学 | Stress testing device for non-metal anti-floating anchor rod body |
| CN103487179A (en) * | 2013-10-12 | 2014-01-01 | 青岛理工大学 | Method for testing rod body stress of non-metal anti-floating anchor rod |
| CN108007619A (en) * | 2017-12-06 | 2018-05-08 | 太原理工大学 | A kind of method using fiber grating measurement anchor pole lateral force |
| CN110285900A (en) * | 2019-06-24 | 2019-09-27 | 太原理工大学 | A kind of force measuring method of FBG force-measuring anchor stock |
| CN111236995A (en) * | 2020-01-14 | 2020-06-05 | 东南大学 | Hollow basalt fiber anchor rod system based on FBG technology and construction method |
-
2012
- 2012-01-17 CN CN 201220021404 patent/CN202471318U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103471747A (en) * | 2013-10-12 | 2013-12-25 | 青岛理工大学 | Stress testing device for non-metal anti-floating anchor rod body |
| CN103487179A (en) * | 2013-10-12 | 2014-01-01 | 青岛理工大学 | Method for testing rod body stress of non-metal anti-floating anchor rod |
| CN108007619A (en) * | 2017-12-06 | 2018-05-08 | 太原理工大学 | A kind of method using fiber grating measurement anchor pole lateral force |
| CN110285900A (en) * | 2019-06-24 | 2019-09-27 | 太原理工大学 | A kind of force measuring method of FBG force-measuring anchor stock |
| CN111236995A (en) * | 2020-01-14 | 2020-06-05 | 东南大学 | Hollow basalt fiber anchor rod system based on FBG technology and construction method |
| CN111236995B (en) * | 2020-01-14 | 2021-08-24 | 东南大学 | Hollow basalt fiber anchor rod system based on FBG technology and construction method |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121003 Termination date: 20170117 |