CN208366796U - Series distributed optical fiber geological stability safety monitoring sensor and system - Google Patents
Series distributed optical fiber geological stability safety monitoring sensor and system Download PDFInfo
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- CN208366796U CN208366796U CN201821084219.4U CN201821084219U CN208366796U CN 208366796 U CN208366796 U CN 208366796U CN 201821084219 U CN201821084219 U CN 201821084219U CN 208366796 U CN208366796 U CN 208366796U
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Abstract
The utility model discloses a kind of series distributed optical fiber geological stability safety monitoring sensor and systems, it is related to geology detection technique field comprising ontology, two groups of sensing units, the first armored fiber optic, the second armored fiber optic, the first optical fiber, the second optical fiber, third optical fiber, the 4th optical fiber；The lower end of ontology is cone tip part, is provided with seal chamber in ontology；Two groups of sensing units are oppositely arranged in seal chamber, and every group of sensing unit includes several fiber gratings being sequentially connected in series from top to bottom；First optical fiber and the second optical fiber are arranged in seal chamber, wherein the lower end of the first optical fiber is connect with the upper end of wherein one group of sensing unit, and the lower end of the sensing unit is connect with the upper end of the second optical fiber；Third optical fiber and the 4th optical fiber are arranged in seal chamber, wherein the lower end of third optical fiber is connect with the upper end of another set sensing unit, and the lower end of the sensing unit is connect with the upper end of the 4th optical fiber, and the lower end of the 4th optical fiber is connect with the lower end of the second optical fiber.
Description
Technical field
The utility model relates to geology detection technique fields, are specifically a kind of series distributed optical fiber geological stabilities
Safety monitoring sensor and system.
Background technique
Currently, the degree that slope monitoring is taken seriously improves year by year since slope stability influence engineering is increasing, it is domestic
It is increasing that investment is studied it outside, but due to the internal structure of side slope complexity, different soils inner case is different, inside
It is whether stable, great pressure and its internal moisture content can be born, if having micro-displacement phenomenon, in construction not
It can consider truth, these are all the difficult points in engineering.For the effect of checking engineering, the guarantee of engineering safety operation,
The stability of real-time monitoring side slope is all essential.Deformation of slope is to show that side slope changes most apparent parameter, small
Shape changes naked eyes and is difficult to observe, and when deformation is accumulated to a certain extent, unpredictable geological disaster will occur.So side
It is the amount that can most illustrate side slope outer shape variation and trend that domatic, which becomes,.If discovery deformation of slope that can be as early as possible, just
It can accurately accomplish accurate forecast before side slope is slided, avoid losing.
The number of side slope internal moisture also will affect slope stability, when excess moisture, will result in generation of breaching a dyke.Institute
It is mainly monitored and is carried out from characteristic quantity with slope monitoring.The monitoring of first deformation predominantly detects earth's surface deformation such as surface cracks
Size.Whether the monitoring of second angle, mainly detection side slope integrally tilt.It is finally exactly the monitoring of moisture penetration, it is main to supervise
Survey side slope internal moisture it is deep number.The mode of slope monitoring is varied, and domestic and international slope monitoring is with scientific skill at present
The development of art, towards full-automatic, precision is high, real-time remote monitoring development, the people of the low time and effort consuming of precision since most
The monitoring of work tape measure slowly cross wave to accurately, conveniently, the instrument monitoring that uses manpower and material resources sparingly.
Current simplest monitoring method is exactly to take the method manually directly observed, and is qualitatively judged, and naked eyes are passed through
Observe the information such as crack, displacement, ground settlement.Artificial directly observation method is simply direct, but for some engineerings remote
And when adverse circumstances, artificial directly observation just seems very unsuitable, and personnel safety has very big problem, and naked eyes are for micro-
The variation of thin tail sheep is not discovered not come out substantially, and for precision, in real time, chronicity is not adapted to.
Utility model content
In view of the deficiencies in the prior art, the purpose of this utility model is to provide a kind of series distributed optical fiber
Matter monitoring stability sensor and system, anti-electromagnetic interference capability is strong, and since optical signal is remote in a fiber
When transmission, the decaying of signal is small, so it is very suitable to telecommunication.
To achieve the above objectives, the technical scheme adopted by the utility model is that: a kind of series distributed optical fiber geology is stablized
Property safety monitoring sensor, including ontology, further include two groups of sensing units, the first armored fiber optic, the second armored fiber optic, the first light
Fibre, the second optical fiber, third optical fiber, the 4th optical fiber；The lower end of the ontology is cone tip part, is provided with seal chamber in ontology；Two groups
Sensing unit is oppositely arranged in seal chamber, and every group of sensing unit includes several fiber gratings being sequentially connected in series from top to bottom；Institute
It states the first optical fiber and the second optical fiber is arranged in seal chamber, wherein the lower end of the first optical fiber and wherein one group of sensing unit
Upper end connection, the lower end of the sensing unit is connect with the upper end of the second optical fiber；The third optical fiber and the 4th optical fiber are arranged at
In seal chamber, wherein the lower end of third optical fiber is connect with the upper end of another set sensing unit, the lower end of the sensing unit and the
The upper end of four optical fiber connects, and the lower end of the 4th optical fiber is connect with the lower end of the second optical fiber；It wears one end of first armored fiber optic
Enter in seal chamber, is connect by the first locking sheath with the upper end of the first optical fiber；One end of second armored fiber optic penetrates close
It seals intracavitary, is connect by the second locking sheath with the upper end of third optical fiber.
Based on the above technical solution, the other end of first armored fiber optic and external stress (FBG) demodulator connect
It connects.
Based on the above technical solution, first armored fiber optic penetrates seal chamber by the first protective metal shell.
Based on the above technical solution, two armored fiber optic penetrates seal chamber by the second protective metal shell.
Based on the above technical solution, wherein one group of sensing unit includes concatenated first fiber grating and the second light
Fine grating, the first fiber grating being located above are connect with the first optical fiber, underlying second fiber grating and the second optical fiber
Connection；Another set sensing unit includes concatenated third fiber grating and the 4th fiber grating, the third optical fiber being located above
Grating is connect with third optical fiber, and underlying 4th fiber grating is connect with the 4th optical fiber.
Based on the above technical solution, first optical fiber, the second optical fiber, third optical fiber, the 4th optical fiber are list
Mode fiber.
Based on the above technical solution, the ontology is taper anchoring component, and rod-shape, side are bored in front in the form of sheets
Face is in plank frame.
The invention also discloses a kind of safety monitoring system, including stress (FBG) demodulator, the stress (FBG) demodulator with it is several
Above-mentioned sensor series connection.
The utility model has the beneficial effects that:
It is New Sensing Technology using novel fiber grating sensing technology, since it leans on lightray propagation information, brings up
Its maximum feature, anti-electromagnetic interference capability is strong, and when being transmitted at a distance in a fiber due to optical signal, the decaying of signal
It is small, so it is very suitable to telecommunication.Currently, fiber grating oneself be used to measurement temperature, stress, acceleration, humidity
Even gas concentration etc., and very high accuracy is reached to the detection of each characteristic quantity.Fiber grating sensing technology symbol
Close precision in the engineerings such as practical Rail Highway coal mine it is high, apart from farther out, multiple spot distribution, long service life, the technology of high stability
It is required that providing a kind of method for solving long-term real-time monitoring and risk prediction in engineering well.Therefore this patent discloses one
The real-time slope monitoring system based on FBG sensor is covered, system selection is multiple to rely on sign amount to judge slope stability, respectively
It is moisture penetration pressure in side slope, side slope surface crack, side slope angle.
Detailed description of the invention
Fig. 1 is that the structure of series distributed optical fiber geological stability safety monitoring sensor in the utility model embodiment is shown
It is intended to；
Fig. 2 is the side view of series distributed optical fiber geological stability safety monitoring sensor in the utility model embodiment
Figure；
Fig. 3 is the structural representation of series distributed optical fiber geological stability safety monitoring system in the utility model embodiment
Figure.
Appended drawing reference:
1- cone tip part；2- ontology；The second optical fiber of 3-；The second fiber grating of 4-；The first fiber grating of 5-；The first optical fiber of 6-；
7- stress (FBG) demodulator；8- first locks sheath；The first armored fiber optic of 9-；The first protective metal shell of 10-；11- seal chamber；12- second
Protective metal shell；13- second locks sheath；The second armored fiber optic of 14-；15- third optical fiber；16- third fiber grating；17- the 4th
Fiber grating；The 4th optical fiber of 18-.
Specific embodiment
The embodiments of the present invention are described below in detail, the embodiment described example is shown in the accompanying drawings, wherein from beginning
Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.
In the description of the present invention, it should be noted that for the noun of locality, if any term " center ", " laterally
(X) ", " longitudinal (Y) ", " vertical (Z) ", " length ", " width ", " thickness ", "upper", "lower", "front", "rear", "left", "right",
The indicating positions such as "vertical", "horizontal", "top", "bottom", "inner", "outside", " clockwise ", " counterclockwise " and positional relationship be based on
Orientation or positional relationship shown in the drawings is merely for convenience of narration the utility model and simplifies description, rather than instruction or dark
Showing signified device or element must have a particular orientation, be constructed and operated with particular orientation, should not be understood as limiting this reality
With novel specific protection scope.
In addition, being used for description purposes only if any term " first ", " second ", it is not understood to indicate or imply relatively heavy
The property wanted or the quantity for implicitly indicating technical characteristic." first " is defined as a result, " second " feature can be expressed or implicit include
One or more this feature, in the utility model description, " several ", " several " are meant that two or more, remove
It is non-separately to have clearly specific restriction.
Made below with reference to the attached drawing of specification by being further described to specific embodiment of the present utility model
The technical solution of the utility model and its benefits are clearer.Describing embodiment below with reference to attached drawing is to show
Example property, it is intended to explain the utility model, and should not be understood as limiting the present invention.
Shown in Figure 1, the utility model embodiment provides a kind of series distributed optical fiber geological stability safety prison
Survey sensor, including ontology 2, further include two groups of sensing units, the first armored fiber optic 9, the second armored fiber optic 14, the first optical fiber 6,
Second optical fiber 3, third optical fiber 15, the 4th optical fiber 18；
The lower end of ontology 2 is cone tip part 1, is provided with seal chamber 11 in ontology 2；
Two groups of sensing units are oppositely arranged in seal chamber 11, if every group of sensing unit includes being sequentially connected in series from top to bottom
Dry fiber grating；In the present embodiment, wherein one group of sensing unit includes concatenated first fiber grating 5 and the second fiber grating 4,
It is connected using fused fiber splice technique.The first fiber grating 5 being located above is connect with the first optical fiber 6, and connection type uses optical fiber
Jumper.Underlying second fiber grating 4 is connect with the second optical fiber 3；Another set sensing unit includes concatenated
Three fiber gratings 16 and the 4th fiber grating 17, the third fiber grating 16 being located above is connect with third optical fiber 15, under being located at
4th fiber grating 17 of side is connect with the 4th optical fiber 18.Specifically, being connected using fused fiber splice technique.
First optical fiber 6 and the second optical fiber 3 are arranged in seal chamber 11, wherein the lower end of the first optical fiber 6 and wherein one group
The upper end of sensing unit connects, and the lower end of the sensing unit is connect with the upper end of the second optical fiber 3；
Third optical fiber 15 and the 4th optical fiber 18 are arranged in seal chamber 11, wherein the lower end of third optical fiber 15 in addition
The upper end connection of one group of sensing unit, the lower end of the sensing unit is connect with the upper end of the 4th optical fiber 18, under the 4th optical fiber 18
End is connect with the lower end of the second optical fiber 3；Specifically, being connected using fused fiber splice technique.
One end of first armored fiber optic 9 penetrates in seal chamber 11, passes through the upper end of the first locking sheath 8 and the first optical fiber 6
Connection；Specifically, the first armored fiber optic 9 penetrates seal chamber 11 by the first protective metal shell 10.The other end of first armored fiber optic 9
It is connect with external stress (FBG) demodulator 7.
One end of second armored fiber optic 14 penetrates in seal chamber 11, passes through the second locking sheath 13 and third optical fiber 15
Upper end connection.Specifically, two armored fiber optics penetrate seal chamber 11 by the second protective metal shell 12.
Specifically, the first optical fiber 6, the second optical fiber 3, third optical fiber 15, the 4th optical fiber 18 are single mode optical fiber.
Shown in Figure 2, ontology 2 is taper anchoring component, and rod-shape is bored in front in the form of sheets.Contract is facilitated to enter ground when installation
Table is hereinafter, directly measure, and side uses plank frame, convenient for forming stress induction.
Shown in Figure 3, the utility model embodiment also provides a kind of safety monitoring system, including stress (FBG) demodulator 7, should
Stress (FBG) demodulator 7 is connect with several above-mentioned sensor series.
The working principle of the utility model are as follows:
Stress (FBG) demodulator inputs wideband laser to the first optical fiber 6 by the first armored fiber optic 9, and the first optical fiber 6 is defeated by laser
It is sent to the first fiber grating and the second fiber grating, enters the 4th fiber grating 17, the by the second optical fiber 3, the 4th optical fiber 18
Then three fiber gratings 16 are transferred to the second armored fiber optic 14 by third optical fiber 15.Sensor structure is due to by outside
Stress is deformed, and can make the first fiber grating and the second fiber grating, third fiber grating and the 4th fiber grating point
Chan Sheng not stretch and compression, grating sensor using symmetrical, thus can some respective wavelength laser quilt
It reflects, linear relationship is presented in the intensity of reflection laser and stress deformation, can thus measure stress variation.Pass through single mode
Optical fiber is by several sensor series, so that it may using wavelength as address, realize that slip mass arrangement array carries out stress parameters measurement.
Compared to traditional sensor, it is many unique that fibre optical sensor has the advantages that, has extensively in many fields
Research and application.Optical fibre refractivity changing type sensor have many advantages, such as it is highly sensitive and become fibre optical sensor it is most practical one
Kind.Fiber-optic grating sensor based on single mode optical fiber scattering principle has many advantages, such as that production is simple, measurement is convenient and becomes optical fiber
Very common one kind in scatter-type sensor research.
In the description of specification, reference term " one embodiment ", " preferably ", " example ", " specific example " or " one
The description of a little examples " etc. means particular features, structures, materials, or characteristics described in conjunction with this embodiment or example, is contained in
In at least one embodiment or example of the utility model, in the present specification not necessarily for the schematic representation of above-mentioned term
Refer to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be any one
It is combined in a suitable manner in a or multiple embodiments or example.
The utility model is not limited to above embodiment, for those skilled in the art, not
Under the premise of being detached from the utility model principle, several improvements and modifications can also be made, these improvements and modifications are also considered as this reality
Within novel protection scope.The content being not described in detail in this specification belongs to well known to professional and technical personnel in the field
The prior art.
Claims (8)
1. a kind of series distributed optical fiber geological stability safety monitoring sensor, including ontology (2), it is characterised in that: also wrap
Include two groups of sensing units, the first armored fiber optic (9), the second armored fiber optic (14), the first optical fiber (6), the second optical fiber (3), third
Optical fiber (15), the 4th optical fiber (18)；
The lower end of the ontology (2) is cone tip part (1), is provided with seal chamber (11) in ontology (2)；
Two groups of sensing units are oppositely arranged in seal chamber (11), every group of sensing unit include be sequentially connected in series from top to bottom it is several
Fiber grating；
First optical fiber (6) and the second optical fiber (3) are arranged in seal chamber (11), wherein the lower end of the first optical fiber (6) with
The wherein upper end connection of one group of sensing unit, the lower end of the sensing unit is connect with the upper end of the second optical fiber (3)；
The third optical fiber (15) and the 4th optical fiber (18) are arranged in seal chamber (11), wherein under third optical fiber (15)
End is connect with the upper end of another set sensing unit, and the lower end of the sensing unit is connect with the upper end of the 4th optical fiber (18), and the 4th
The lower end of optical fiber (18) is connect with the lower end of the second optical fiber (3)；
One end of first armored fiber optic (9) penetrates in seal chamber (11), passes through the first locking sheath (8) and the first optical fiber
(6) upper end connection；
One end of second armored fiber optic (14) penetrates in seal chamber (11), passes through the second locking sheath (13) and third optical fiber
(15) upper end connection.
2. series distributed optical fiber geological stability safety monitoring sensor as described in claim 1, it is characterised in that: described
The other end of first armored fiber optic (9) is connect with external stress (FBG) demodulator (7).
3. series distributed optical fiber geological stability safety monitoring sensor as described in claim 1, it is characterised in that: described
First armored fiber optic (9) penetrates seal chamber (11) by the first protective metal shell (10).
4. series distributed optical fiber geological stability safety monitoring sensor as described in claim 1, it is characterised in that: described
Two armored fiber optics penetrate seal chamber (11) by the second protective metal shell (12).
5. series distributed optical fiber geological stability safety monitoring sensor as described in claim 1, it is characterised in that: wherein
One group of sensing unit includes concatenated first fiber grating (5) and the second fiber grating (4), the first fiber grating being located above
(5) it is connect with the first optical fiber (6), underlying second fiber grating (4) connect with the second optical fiber (3)；
Another set sensing unit includes concatenated third fiber grating (16) and the 4th fiber grating (17), be located above
Three fiber gratings (16) are connect with third optical fiber (15), and underlying 4th fiber grating (17) and the 4th optical fiber (18) are even
It connects.
6. series distributed optical fiber geological stability safety monitoring sensor as described in claim 1, it is characterised in that: described
First optical fiber (6), the second optical fiber (3), third optical fiber (15), the 4th optical fiber (18) are single mode optical fiber.
7. series distributed optical fiber geological stability safety monitoring sensor as described in claim 1, it is characterised in that: described
Ontology (2) is taper anchoring component, and rod-shape is bored in front in the form of sheets, and side is in plank frame.
8. a kind of safety monitoring system, including stress (FBG) demodulator (7), it is characterised in that: the stress (FBG) demodulator (7) and several rights
It is required that sensor series described in 1 connect.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821084219.4U CN208366796U (en) | 2018-07-10 | 2018-07-10 | Series distributed optical fiber geological stability safety monitoring sensor and system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821084219.4U CN208366796U (en) | 2018-07-10 | 2018-07-10 | Series distributed optical fiber geological stability safety monitoring sensor and system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108760603A (en) * | 2018-07-10 | 2018-11-06 | 湖北文索光电科技有限公司 | Series distributed optical fiber geological stability safety monitoring sensor and system |
| CN109655001A (en) * | 2019-02-03 | 2019-04-19 | 南京吉欧地下空间科技有限公司 | A kind of device and its application method of the lateral displacement of the in-situ monitoring soil body |
| CN111895918A (en) * | 2020-08-28 | 2020-11-06 | 哈尔滨工业大学 | Multipoint serial distributed optical fiber displacement sensor and measuring system thereof |
-
2018
- 2018-07-10 CN CN201821084219.4U patent/CN208366796U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108760603A (en) * | 2018-07-10 | 2018-11-06 | 湖北文索光电科技有限公司 | Series distributed optical fiber geological stability safety monitoring sensor and system |
| CN109655001A (en) * | 2019-02-03 | 2019-04-19 | 南京吉欧地下空间科技有限公司 | A kind of device and its application method of the lateral displacement of the in-situ monitoring soil body |
| CN109655001B (en) * | 2019-02-03 | 2024-05-24 | 南京吉欧地下空间科技有限公司 | Device for in-situ monitoring of soil lateral displacement and application method thereof |
| CN111895918A (en) * | 2020-08-28 | 2020-11-06 | 哈尔滨工业大学 | Multipoint serial distributed optical fiber displacement sensor and measuring system thereof |
| CN111895918B (en) * | 2020-08-28 | 2021-06-15 | 哈尔滨工业大学 | Multipoint serial distributed optical fiber displacement sensor and measuring system thereof |
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