CN205426397U - Force measuring device of anchor pole - Google Patents
Force measuring device of anchor pole Download PDFInfo
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- CN205426397U CN205426397U CN201521039137.4U CN201521039137U CN205426397U CN 205426397 U CN205426397 U CN 205426397U CN 201521039137 U CN201521039137 U CN 201521039137U CN 205426397 U CN205426397 U CN 205426397U
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- fiber
- measuring device
- dynamometry elastomer
- elastomer
- anchor rod
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Abstract
The utility model discloses a force measuring device of anchor pole, stock, measuring force device include the dynamometry elastomer, and the both ends of this dynamometry elastomer are equipped with the connection structure with the stock rigid coupling, set up flutedly on the dynamometry elastomer, the grooved underside laminating has a fiber bragg grating sensor ware. The utility model discloses a measuring force device can anti -electromagnetic interference, and is corrosion -resistant, is applicable to ground protecting project 's monitoring system.
Description
Technical field
This utility model relates to a kind of anchor rod force-measuring device, anchor pole.
Background technology
In traditional rock protection engineering, the load-bearing monitor of anchor pole is frequently with electric transducer or fiber-optic grating sensor, electric transducer or fiber-optic grating sensor are pasted onto on anchor pole, owing to anchor pole is longer, extension test cannot be carried out at laboratory and demarcate test, and anchor pole is usually embedded in adverse circumstances, the highest to the performance requirement of sensor, electric transducer also exists poor anti jamming capability in long term monitoring, easily it is corroded, the defects such as stability is bad, cause certainty of measurement poor, and can not be used in series, considerably increase the complexity of construction, bring very big inconvenience to on-the-spot installation and monitoring；Fiber-optic grating sensor has corrosion-resistant, electromagnetism interference, can concatenate the advantages such as use, but existing force measuring structure certainty of measurement is the highest.
Summary of the invention
Technical problem to be solved in the utility model is, not enough for prior art, it is provided that anchor rod force-measuring device, anchor pole and the axis force of anchor measuring method that a kind of volume is little, capacity of resisting disturbance is strong, corrosion-resistant, good stability, certainty of measurement are high.
For solving above-mentioned technical problem, this utility model be the technical scheme is that a kind of anchor rod force-measuring device, and including dynamometry elastomer, the two ends of this dynamometry elastomer are provided with the attachment structure affixed with anchor pole；Groove is offered on described dynamometry elastomer；Described groove floor is fitted with the first fiber-optic grating sensor.
The second fiber-optic grating sensor unsettled in described groove it is provided with in described groove；Described first Fibre Optical Sensor and the second Fibre Optical Sensor are connected into fiber grating.Second fiber-optic grating sensor can eliminate the ambient temperature impact on measurement result as the temperature compensation sensor of the first fiber-optic grating sensor, improves certainty of measurement.
Described dynamometry elastomer is cylindrical structure, and described cylindrical structure surface is provided with plane.Described groove is provided with the cover plate for encapsulating described fiber grating, protects fiber grating.Cover plate is fixing on the plane.Facilitate making and the installation of cover plate.
In order to improve certainty of measurement further, the axis of described dynamometry elastomer is crossed in the bottom surface of described groove, and it is parallel with plane, i.e. groove floor is on neutral line when dynamometry elastomer bends, during the bending of dynamometry elastomer, groove floor produces without strain, it is to avoid the impact that fiber grating sensor wavelength is drifted about by the bending stress being likely to occur, only measure the axial tension of anchor pole, make measurement result more accurate.
Offering through hole on described cover plate, the tail optical fiber of described fiber grating stretches out from described through hole；Described through hole cross section is L-shaped；Protected pipe is overlapped on the tail optical fiber of described fiber grating.Facilitate fiber grating to be connected with external signal analyser, preferably protect fiber grating simultaneously.
Described dynamometry elastomer two ends all offer multiple connecting hole, are conveniently connected with anchor pole.
Correspondingly, this utility model additionally provides a kind of anchor pole, and this anchor pole includes two sections；These the two sections two ends being respectively and fixedly connected with dynamometry elastomer；Groove is offered on described dynamometry elastomer；Described groove floor is fitted with the first fiber-optic grating sensor.
nullThis utility model additionally provides a kind of axis force of anchor measuring method，The method mainly realizes process: after pulling force suffered by anchor pole is delivered on dynamometry elastomer，Dynamometry elastomer is demarcated by extension test，Determine the wavelength variable quantity of the first fiber-optic grating sensor FBG1 and the corresponding relation of suffered pulling force，Demarcated by temperature test and draw the first fiber-optic grating sensor FBG1 and the temperature control ratio K of the second grating sensor FBG2，The wavelength variable quantity of the first fiber-optic grating sensor FBG1 is deducted the wavelength variable quantity of the second grating sensor FBG2 of K times，Reject the wavelength variable quantity of the FBG1 that variations in temperature causes，I.e. draw the wavelength variable quantity of the first fiber-optic grating sensor FBG1 caused by pulling force suffered by anchor pole，Then by the corresponding relation of the wavelength variable quantity of the first fiber-optic grating sensor FBG1 Yu suffered pulling force，Draw the pulling force of anchor pole.
Compared with prior art, this utility model is had the beneficial effect that device for measuring force of the present utility model can be in indoor making, and easy to make, volume is little, it is also possible to carries out extension test at laboratory and demarcates test；One of them fiber-optic grating sensor is affixed on bottom portion of groove, and it is parallel with the plane on dynamometry elastomer, i.e. groove floor is on neutral line when dynamometry elastomer bends, avoid the impact that fiber grating sensor wavelength is drifted about by the bending stress being likely to occur, only measure the axial tension of anchor pole, make measurement result more accurate, freely-suspended fiber-optic grating sensor is as temperature compensation sensor, the data gathered with the fiber-optic grating sensor being pasted onto groove floor compare, and can improve certainty of measurement further；It is connected by screw rod between anchor pole with elastomer, connects simplicity, well directly can connect at the scene in factory process later, convenient and swift；Device for measuring force capacity of resisting disturbance of the present utility model is strong, corrosion-resistant, good stability, it is adaptable to the monitoring system of rock protection engineering；Force measuring method of the present utility model easily realizes, and measurement result is accurate.
Accompanying drawing explanation
Fig. 1 is this utility model structural representation；
Fig. 2 is this utility model sectional view；
Fig. 3 is this utility model covering plate structure schematic diagram.
Detailed description of the invention
As depicted in figs. 1 and 2, this utility model one embodiment includes that the dynamometry elastomer 1 being connected respectively is fixed, with one section of anchor pole 3, in two ends by attachment structure；Groove 7 is offered on described dynamometry elastomer 1；Being provided with the fiber grating 9 being in series by two fiber-optic grating sensors in described groove 7, one of them fiber-optic grating sensor 12 is fixed on bottom described groove 7, and another one fiber-optic grating sensor 13 is unsettled in described groove 7；Dynamometry elastomer 1 is cylindrical structure, and described cylindrical structure surface is provided with plane 10；The axis of described dynamometry elastomer 1 is crossed in the bottom surface of groove 7, and parallel with plane 10.
Groove 7 is provided with the cover plate 2 for encapsulating described fiber grating 9；Described cover plate 2 is fixed in described plane 10；Such as Fig. 3, cover plate 2 offering through hole 6, the tail optical fiber of described fiber grating 9 stretches out from described through hole 6, and through hole 6 cross section is L-shaped, and the tail optical fiber of fiber grating 9 overlaps protected pipe.
Attachment structure includes the multiple connecting holes 4 being opened in dynamometry elastomer 1 end, and accordingly, anchor pole of the present utility model includes two sections；Multiple hole 11 is all offered on every section；The connecting hole 4 of the one end corresponding with dynamometry elastomer 1, hole 11 on every section of anchor pole is connected by screw rod.
After the pulling force of anchor pole 3 is delivered on dynamometry elastomer 1, pulling force is converted into the strain of dynamometry elastomer 1 and acts on the fiber-optic grating sensor FBG1 bottom groove 7, after FBG1 effect strained, reflection wavelength can change, and another one fiber-optic grating sensor FBG2 is unsettled, so will not under tension effect, using it as the temperature compensation sensor of FBG1.nullDynamometry elastomer 1(is demarcated i.e. by extension test in advance: measure elastomer strain=(pulling force F) under pulling force F effect/(Young's modulus of the cross-sectional area * measurement elastomer of dynamometry elastomer)) at laboratory，Determine that (extension test is demarcated and generally used stretching-machine for the corresponding relation of the wavelength variable quantity of FBG1 and suffered pulling force，Dynamometry elastomer is placed on above stretching-machine，Dynamometry elastomer is applied pulling force，Simultaneously，With the grating wavelength variable quantity under instrument record difference value of thrust effect，Pulling force wavelength variable quantity is made homologous thread figure，I.e. obtain the corresponding relation of pulling force and wavelength variable quantity)，The temperature control ratio K drawing FBG1 and FBG2 is demarcated by temperature test，The most just can be by the wavelength change of extraneous optical fiber raster wavelength demodulator monitoring FBG1 and FBG2，Then the wavelength variable quantity of FBG1 is deducted the wavelength variable quantity of the FBG2 of K times，Reject the wavelength variable quantity of the FBG1 that variations in temperature causes，Just draw the wavelength variable quantity of the FBG1 caused by axis force of anchor，Wavelength variable quantity and the corresponding relation of pulling force of the FBG1 drawn is demarcated the most again by extension test，Draw the pulling force suffered by anchor pole.
Claims (7)
1. an anchor rod force-measuring device, it is characterised in that include dynamometry elastomer (1), the two ends of this dynamometry elastomer (1) are provided with the attachment structure affixed with anchor pole (3)；Groove (7) is offered on described dynamometry elastomer (1)；Described groove (7) bottom surface is fitted with the first fiber-optic grating sensor (12)；The second fiber-optic grating sensor (13) unsettled in described groove (7) it is provided with in described groove (7)；Described first Fibre Optical Sensor and the second Fibre Optical Sensor are connected into fiber grating (9).
Anchor rod force-measuring device the most according to claim 1, it is characterised in that described dynamometry elastomer (1) is cylindrical structure, and described cylindrical structure surface is provided with plane (10).
Anchor rod force-measuring device the most according to claim 2, it is characterised in that the axis of described dynamometry elastomer (1) is crossed in the bottom surface of described groove (7), and parallel with described plane (10).
Anchor rod force-measuring device the most according to claim 2, it is characterised in that described groove (7) is provided with the cover plate (2) for encapsulating described fiber grating (9), described cover plate (2) is fixed in described plane (10).
Anchor rod force-measuring device the most according to claim 4, it is characterised in that offer through hole (6) on described cover plate (2), the tail optical fiber of described fiber grating (9) stretches out from described through hole (6).
Anchor rod force-measuring device the most according to claim 5, it is characterised in that overlap protected pipe on the tail optical fiber of described fiber grating (9).
Anchor rod force-measuring device the most according to claim 1, it is characterised in that described attachment structure includes the multiple connecting holes (4) being opened in described dynamometry elastomer (1) end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521039137.4U CN205426397U (en) | 2015-12-15 | 2015-12-15 | Force measuring device of anchor pole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521039137.4U CN205426397U (en) | 2015-12-15 | 2015-12-15 | Force measuring device of anchor pole |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205426397U true CN205426397U (en) | 2016-08-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521039137.4U Active CN205426397U (en) | 2015-12-15 | 2015-12-15 | Force measuring device of anchor pole |
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| CN (1) | CN205426397U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108507714A (en) * | 2018-06-07 | 2018-09-07 | 广西大学 | Primary structure member, fiber-optic grating sensor and smart stay cable and production method |
| CN110514277A (en) * | 2019-06-28 | 2019-11-29 | 北京东方瑞威科技发展股份有限公司 | A kind of fibre optical sensor for railway big load dynamic weighting |
-
2015
- 2015-12-15 CN CN201521039137.4U patent/CN205426397U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108507714A (en) * | 2018-06-07 | 2018-09-07 | 广西大学 | Primary structure member, fiber-optic grating sensor and smart stay cable and production method |
| CN108507714B (en) * | 2018-06-07 | 2024-02-27 | 广西大学 | Stress component, fiber bragg grating sensor, intelligent inhaul cable and manufacturing method |
| CN110514277A (en) * | 2019-06-28 | 2019-11-29 | 北京东方瑞威科技发展股份有限公司 | A kind of fibre optical sensor for railway big load dynamic weighting |
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