CN203231842U - Temperature self-compensated fiber grating anchor pole dynamometer - Google Patents
Temperature self-compensated fiber grating anchor pole dynamometer Download PDFInfo
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- CN203231842U CN203231842U CN 201320136800 CN201320136800U CN203231842U CN 203231842 U CN203231842 U CN 203231842U CN 201320136800 CN201320136800 CN 201320136800 CN 201320136800 U CN201320136800 U CN 201320136800U CN 203231842 U CN203231842 U CN 203231842U
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- fiber grating
- box body
- crossbeam
- temperature self
- anchor pole
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Abstract
A temperature self-compensated fiber grating anchor pole dynamometer has a temperature self compensation function and is suitable for online monitoring the stress of an anchor pole. The dynamometer comprises a crossbeam (2) suspended in a box body (1), a press ring (3), which is arranged on the crossbeam (2) and of which the upper end extends out of a cover plate (4) of the box body (1), and a first fiber grating (5)and a second fiber grating (6) respectively attached to the upper and lower surfaces of the crossbeam (2) and then led out of the box body (1) with a pigtail after being connected in series. The crossbeam (2), the press ring (3) and the bottom of the box body (1) are provided with coaxial through holes allowing the anchor pole to pass through.
Description
Technical field
The utility model relates to sensor, and particularly a kind of temperature self-compensation fiber grating anchor rod force-measuring ring is applicable in the slope project relative slide displacement between domatic and prestressed reinforcement anchor pole and the measurement of the axis force of anchor that produces.
Background technology
It is little that optical fiber grating sensing has size, in light weight, anti-electromagnetic interference (EMI), and the advantage that reusability waits other type sensor not possess well, development in recent years is rapid, and various optical fiber grating sensing products obtain exploitation and widespread use.Sensor such as optical fiber grating anchor stress, anchor dynamometer is in each engineering field widespread uses such as large scale civil engineering, science of bridge building, side slope protections and play a significant role.
The patent No. is to disclose a kind of grating anchor rod meter probe in 200720020684.7 the utility model instructions, adopt the structure of inside and outside two-layer sleeve, anchor pole passes inner layer sleeve during use, anchor pole one end and inner layer sleeve end face are fixed, the pressure from surrounding rock that anchor pole is subjected to is delivered to inner sleeve, and the wavelength shift that is pasted on a fiber grating generation on the inner sleeve by analysis draws the tensile force size that anchor pole is subjected to.This sensor only is provided with a fiber grating, and temperature can't be eliminated the wave length shift influence of grating.The method of a kind of grating anchor rod force-measuring device and the variation of monitoring anchor stress is then disclosed at the patent of invention instructions of patent No. 200810151099.X, this device combines hydraulic jack and fiber-optic grating sensor, adopt anchor pole and hydraulic jack to fix, anchor stress changes the oil pressure variation that causes and is delivered in the housing that grating sensor is housed by oil pipe, by fiber Bragg grating (FBG) demodulator read test data, but do not specify the measuring principle details of fiber-optic grating sensor.This measurement mechanism structure is formed comparatively complicated.
The utility model content
Technical problem to be solved in the utility model provides a kind of temperature self-compensation fiber grating anchor rod force-measuring ring, possesses the temperature self-compensation function, is applicable to the on-line monitoring of anchor stress.
The technical scheme that its technical matters that solves the utility model adopts is as follows:
A kind of temperature self-compensation fiber grating anchor rod force-measuring ring of the present utility model is characterized in that it comprises: crossbeam, and suspending is installed in the box body; Pressure ring is positioned on the crossbeam, and the cover plate of box body is extended in its upper end; First fiber grating, second fiber grating are pasted and fixed on respectively on the upper and lower surface of crossbeam, and the serial connection back is external by the tail optical fiber outlet box; Crossbeam, pressure ring and box body bottom have the coaxial through-hole that passes for anchor pole.
The beneficial effects of the utility model are, possess the temperature self-compensation function, are applicable to the on-line monitoring of anchor stress, have simple in structure, characteristics such as manufacture craft is simple, easy to operate.
Description of drawings
This instructions comprises following three width of cloth accompanying drawings:
Fig. 1 is the sectional drawing of a kind of temperature self-compensation fiber grating anchor rod force-measuring of the utility model ring;
Fig. 2 is the parts exploded perspective view of a kind of temperature self-compensation fiber grating anchor rod force-measuring of the utility model ring;
Fig. 3 is the use view of a kind of temperature self-compensation fiber grating anchor rod force-measuring of the utility model ring.
Parts shown in the figure, toponym and corresponding mark: box body 1, crossbeam 2, pressure ring 3, cover plate 4, first fiber grating 5, second fiber grating 6, optical cable output protection joint 7, rock mass 8, reinforcing anchor pole 9, anchoring place 10.
Embodiment
Below in conjunction with drawings and embodiments the utility model is further specified.
See figures.1.and.2, a kind of temperature self-compensation fiber grating anchor rod force-measuring ring of the present utility model, it comprises: crossbeam 2, suspending is installed in the box body 1; Pressure ring 3 is positioned on the crossbeam 2, and the cover plate 4 of box body 1 is extended in its upper end; First fiber grating 5, second fiber grating 6 are pasted and fixed on respectively on the upper and lower surface of crossbeam 2, and the serial connection back is drawn outside the box body 1 by tail optical fiber; Crossbeam 2, pressure ring 3 and box body 1 bottom have the coaxial through-hole that passes for anchor pole.
With reference to Fig. 3, pass the anchor rod force-measuring ring through reinforcing anchor pole 9 ends after the anchoring, box body 1 closely contacts with rock mass 8, reinforces the welding of anchor pole 9 ends and pressure ring 3 upper ends and fixes.Inner unstable or have under the situation of trend such as landslide when rock mass, when causing producing slide displacement between rock mass and the reinforcing anchor pole 9, can be subjected to the extrapolation acting force of rock mass with the box bodys 1 that rock mass 8 closely contacts, make crossbeam 2 bendings in it, the shape information that causes first fiber grating 5, second fiber grating 6 changes, the optical cable of drawing is connected on the optic fiber grating wavelength analyser, and demodulation analysis goes out relevant information.The bending of crossbeam is oppositely drifted about two fiber grating generation wavelength that are positioned on its end upper and lower surface, with the difference of first fiber grating 5, second fiber grating, the 6 wavelength output quantity as sensor.Because temperature variation causes the change direction unanimity of first fiber grating 5, second fiber grating 6, therefore with the wavelength difference of first fiber grating 5, second fiber grating 6 as detection signal, can eliminate influence of temperature variation.
With reference to Fig. 1, described first fiber grating 5, second fiber grating 6 are positioned at crossbeam 2 one ends and box body 1 fixed connection place.Usually, the exit at tail optical fiber should arrange optical cable output protection joint 7 on the described box body 1.
Some principles of the above a kind of temperature self-compensation fiber grating anchor rod force-measuring of the utility model ring that just explains through diagrams, be not be the utility model to be confined to shown in and in described concrete structure and the scope of application, so every corresponding modify and equivalent that might be utilized all belongs to the claim that the utility model is applied for.
Claims (3)
1. temperature self-compensation fiber grating anchor rod force-measuring ring is characterized in that it comprises: crossbeam (2), and suspending is installed in the box body (1); Pressure ring (3) is positioned over crossbeam (2), and the cover plate (4) of box body (1) is extended in its upper end; First fiber grating (5), second fiber grating (6) are pasted and fixed on respectively on the upper and lower surface of crossbeam (2), and the serial connection back is drawn outside the box body (1) by tail optical fiber; Crossbeam (2), pressure ring (3) and box body (1) bottom have the coaxial through-hole that passes for anchor pole.
2. a kind of temperature self-compensation fiber grating anchor rod force-measuring ring as claimed in claim 1, it is characterized in that: described first fiber grating (5), second fiber grating (6) are positioned at crossbeam (2) one ends and box body (1) fixed connection place.
3. a kind of temperature self-compensation fiber grating anchor rod force-measuring ring as claimed in claim 1 is characterized in that: the exit that described box body (1) is gone up at tail optical fiber should arrange optical cable output protection joint (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320136800 CN203231842U (en) | 2013-03-25 | 2013-03-25 | Temperature self-compensated fiber grating anchor pole dynamometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320136800 CN203231842U (en) | 2013-03-25 | 2013-03-25 | Temperature self-compensated fiber grating anchor pole dynamometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203231842U true CN203231842U (en) | 2013-10-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320136800 Expired - Fee Related CN203231842U (en) | 2013-03-25 | 2013-03-25 | Temperature self-compensated fiber grating anchor pole dynamometer |
Country Status (1)
| Country | Link |
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| CN (1) | CN203231842U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106940198A (en) * | 2017-03-13 | 2017-07-11 | 无锡亚天光电科技有限公司 | A kind of prestressing force optical fiber ring structure |
| CN111272327A (en) * | 2020-03-17 | 2020-06-12 | 国网河南省电力公司电力科学研究院 | A fiber grating three-dimensional tension sensor |
-
2013
- 2013-03-25 CN CN 201320136800 patent/CN203231842U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106940198A (en) * | 2017-03-13 | 2017-07-11 | 无锡亚天光电科技有限公司 | A kind of prestressing force optical fiber ring structure |
| CN111272327A (en) * | 2020-03-17 | 2020-06-12 | 国网河南省电力公司电力科学研究院 | A fiber grating three-dimensional tension sensor |
| CN111272327B (en) * | 2020-03-17 | 2021-08-24 | 国网河南省电力公司电力科学研究院 | A fiber grating three-dimensional tension sensor |
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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: 20131009 |