CN113776704A - Fiber grating sensor applied to underground stress monitoring - Google Patents
Fiber grating sensor applied to underground stress monitoring Download PDFInfo
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- CN113776704A CN113776704A CN202111033130.1A CN202111033130A CN113776704A CN 113776704 A CN113776704 A CN 113776704A CN 202111033130 A CN202111033130 A CN 202111033130A CN 113776704 A CN113776704 A CN 113776704A
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- transmission line
- protective cover
- fiber grating
- protection
- fixedly connected
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- 239000000835 fiber Substances 0.000 title claims abstract description 35
- 238000012544 monitoring process Methods 0.000 title claims abstract description 16
- 230000001681 protective effect Effects 0.000 claims abstract description 71
- 230000005540 biological transmission Effects 0.000 claims abstract description 59
- 238000001035 drying Methods 0.000 claims abstract description 16
- 238000001514 detection method Methods 0.000 claims abstract description 13
- 230000008878 coupling Effects 0.000 claims description 10
- 238000010168 coupling process Methods 0.000 claims description 10
- 238000005859 coupling reaction Methods 0.000 claims description 10
- 238000005259 measurement Methods 0.000 description 6
- 238000007789 sealing Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/24—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet
- G01L1/242—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet the material being an optical fibre
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Or Calibration Of Command Recording Devices (AREA)
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Abstract
The invention relates to the technical field of fiber bragg grating sensors, in particular to a fiber bragg grating sensor applied to underground stress monitoring, which comprises a sensor body and a detection contact, wherein the lower end of the sensor body is fixedly connected with a connecting component which is convenient for the connection of the sensor body and a transmission line; according to the invention, the sensor body and the transmission line can be separated and carried conveniently in use through the arranged protective cover, the drying plate and the groove, normal use can be ensured through the spiral connection of the protective cover and the sensor body, meanwhile, the protective cover and the rotary clamping ring have good stability, the influence of an outside humid environment on the protective cover can be avoided, and the arrangement of the drying plate can ensure that the interior of the protective cover is in a dry environment.
Description
Technical Field
The invention relates to the technical field of fiber grating sensors, in particular to a fiber grating sensor applied to underground stress monitoring.
Background
The fiber grating sensor can realize direct measurement of physical quantities such as temperature, strain and the like, because the wavelength of the fiber grating is sensitive to the temperature and the strain at the same time, namely the temperature and the strain cause the coupling wavelength of the fiber grating to move at the same time, so that the temperature and the strain cannot be distinguished by measuring the coupling wavelength of the fiber grating, the problem of cross sensitivity is solved, the distinguishing measurement of the temperature and the stress is the premise of the practicality of the sensor, the distinguishing measurement of the temperature and the stress is realized by measuring the stress and the temperature change through a certain technology, the basic principle of the technologies is that two or two segments of fiber gratings with different temperature and strain response sensitivities form a double-grating temperature and strain sensor, the temperature and strain response sensitivity coefficients of 2 fiber gratings are determined, the temperature and the strain are solved by using 2 binary linear equations, and the distinguishing measurement technology can be divided into two types, i.e. multi-fiber grating measurements and single-fiber grating measurements.
Some fiber grating sensors applied underground have long transmission line length, the transmission line is inconvenient to carry and easy to damage when being carried, once the transmission line is damaged, the fiber grating sensor needs to be replaced, huge economic loss is caused, meanwhile, the underground condition is complex and moist, and the fiber grating sensor is easy to influence, so that the fiber grating sensor applied to underground stress monitoring is provided aiming at the problems.
Disclosure of Invention
The present invention is directed to a fiber grating sensor for underground stress monitoring, which solves the above problems.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a be applied to fiber grating sensor of stress monitoring underground, includes sensor body and detection contact, sensor body lower extreme fixedly connected with makes things convenient for the coupling assembling of sensor body and transmission line connection, the sensor body passes through coupling assembling and transmission line fixed connection, the transmission line other end and detection contact fixed connection, the transmission line outside is equipped with the protection component who has bearing structure, protection component outside one end fixedly connected with gag lever post, the spacing snap ring of gag lever post top fixedly connected with.
As a further scheme of the invention: the limiting snap ring has elasticity, and a detection contact is arranged inside the limiting snap ring.
As a further scheme of the invention: coupling assembling includes protection casing and protection casing ring, the annular recess has been seted up to the inside bottom of protection casing, the inside rotation of recess is connected with rotates the snap ring, rotate inside and the transmission line fixed connection of snap ring, inside transmission line top plug inserted the sensor body, the protection casing top is equipped with the protection casing ring, the internal thread has been seted up to the inside top of protection casing, the protection casing passes through internal thread and sensor body screwed connection.
As a further scheme of the invention: the protective cover ring is annularly arranged, the lower portion of the protective cover ring is concavely arranged, and the inner portion of the protective cover ring covers the outer side of the protective cover.
As a further scheme of the invention: the inside drying plate that is equipped with of protection casing, the drying plate is the annular setting, the drying plate sets up in the transmission line outside.
As a further scheme of the invention: the protection component comprises a protection shell and a rotating handle, the three protection pull ropes are fixedly connected with the rear end face of the outer side of the protection shell, the other ends of the protection pull ropes are fixedly connected with elastic connection ropes, the other ends of the elastic connection ropes are fixedly connected with limiting rings, clamping hooks are arranged inside the limiting rings, fixing plates are fixedly connected with the rear end faces of the clamping hooks, and the rear end faces of the fixing plates are fixedly connected with the protection shell.
As a further scheme of the invention: the protective housing is the annular setting, the standing groove has been seted up in the protective housing outside, and the inside transmission line that is the annular winding that is equipped with of standing groove, the protective housing has elasticity.
As a further scheme of the invention: the inside rotation handle that is equipped with of protecting crust, the inside equal screwed connection in rotation handle both sides has the threaded rod, the threaded rod other end all is vertical direction through pivot and protecting crust cooperation and rotates and be connected, the external screw thread has been seted up towards the 1/2 position outside of the direction of rotating the handle to the threaded rod outside face, and the threaded rod external screw thread of both sides is opposite setting.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, through the arrangement of the protective cover, the transmission line, the protective cover, the rotary clamping ring, the drying plate and the groove, when the sensor is used, the sensor body and the transmission line can be separated and carried, so that the sensor is very convenient, when the sensor is used, the normal use of the sensor body can be ensured through the spiral connection of the protective cover and the sensor body, and meanwhile, the sensor has good stability, the arrangement of the protective cover and the rotary clamping ring can avoid the influence of the outside humid environment on the sensor body, and the arrangement of the drying plate can ensure that the inside of the protective cover is in the dry environment, so that the normal use of the sensor body is ensured;
2. according to the transmission line protection device, the common transmission line is messy when being carried by the protection shell, the rotating handle, the threaded rod, the limiting snap ring, the protection pull rope, the elastic connection rope and the limiting ring, the transmission line can be wound on the outer side of the protection shell at the moment, the transmission line can be protected, meanwhile, the rotating handle can be used for adjusting the inner diameter of the protection shell, the transmission line is further guaranteed to be wound on the outer side of the protection shell tightly, excessive bending of the transmission line is avoided, normal use of the transmission line is guaranteed, the protection pull rope is arranged to guarantee protection of the transmission line, and the transmission line is prevented from being separated from the protection shell.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the structure of FIG. 1 at point A according to the present invention;
fig. 3 is a cross-sectional view of the shield of the present invention.
In the figure: 1-a sensor body, 2-a protective cover, 3-a transmission line, 4-a protective shell, 5-a rotating handle, 6-a threaded rod, 7-a detection contact, 8-a limiting rod, 9-a limiting snap ring, 10-a protective pull rope, 11-an elastic connecting rope, 12-a limiting ring, 13-a fixed plate, 14-a snap hook, 15-a protective cover ring, 16-a rotating snap ring, 17-a drying plate and 18-a groove.
Detailed Description
Example 1:
referring to fig. 1, fig. 2 and fig. 3, the present invention provides a technical solution:
the utility model provides a be applied to fiber grating sensor of stress monitoring underground, including sensor body 1 and detection contact 7, the coupling assembling that 1 lower extreme fixedly connected with of sensor body made things convenient for sensor body 1 and transmission line 3 to be connected, sensor body 1 passes through coupling assembling and 3 fixed connection of transmission line, 3 other ends of transmission line and detection contact 7 fixed connection, the 3 outsides of transmission line are equipped with the protection component that has bearing structure, protection component outside one end fixedly connected with gag lever post 8, the spacing snap ring 9 of 8 top fixedly connected with of gag lever post.
The limiting snap ring 9 has elasticity, and the detection contact 7 is arranged inside the limiting snap ring 9; the limit snap ring 9 can fix the detection contact 7, so that the detection contact is prevented from shaking randomly, the quality of the detection contact is guaranteed, and the detection contact is prevented from being damaged;
the connecting assembly comprises a protective cover 2 and a protective cover ring 15, an annular groove 18 is formed in the bottom layer inside the protective cover 2, a rotary clamping ring 16 is rotatably connected inside the groove 18, the inside of the rotary clamping ring 16 is fixedly connected with the transmission line 3, a plug at the top of the transmission line 3 is inserted into the sensor body 1, the protective cover ring 15 is arranged above the protective cover 2, internal threads are formed in the upper part inside the protective cover 2, and the protective cover 2 is in threaded connection with the sensor body 1 through the internal threads; the rotary clamping ring 16 is matched with the groove 18 in the protective cover 2 for use, so that the protective cover 2 has good sealing performance, and meanwhile, the protective cover 2 can normally rotate and then is connected;
the protective cover ring 15 is arranged in a ring shape, the lower part of the protective cover ring 15 is arranged in a concave shape, and the inner part of the protective cover ring 15 covers the outer side of the protective cover 2; the arrangement can ensure that the protective cover ring 15 is matched with the protective cover 2 for use, thereby having good sealing effect;
a drying plate 17 is arranged in the protective cover 2, the drying plate 17 is arranged in an annular shape, and the drying plate 17 is arranged outside the transmission line 3; the arrangement of the drying plate 17 can ensure that the interior of the protective cover 2 is dry and the normal use of the protective cover is ensured;
the protective assembly comprises a protective shell 4 and a rotating handle 5, the rear end face of the outer side of the protective shell 4 is fixedly connected with three protective pull ropes 10, the other ends of the protective pull ropes 10 are fixedly connected with elastic connecting ropes 11, the other ends of the elastic connecting ropes 11 are fixedly connected with limiting rings 12, clamping hooks 14 are arranged inside the limiting rings 12, the rear end faces of the clamping hooks 14 are fixedly connected with fixed plates 13, and the rear end faces of the fixed plates 13 are fixedly connected with the protective shell 4; the protective pull rope 10 can protect the transmission line 3 by the matching use of the clamping hook 14 and the limiting ring 12, so that the transmission line 3 is prevented from falling off;
the protective shell 4 is arranged in an annular shape, a placing groove is formed in the outer side of the protective shell 4, the transmission line 3 wound in the annular shape is arranged in the placing groove, and the protective shell 4 has elasticity; the arrangement can ensure that the transmission line 3 is wound outside the protective shell 4, and the transmission line 3 is prevented from being damaged;
the inside rotation handle 5 that is equipped with of protecting crust 4, the inside equal screwed connection in 5 both sides of rotation handle has threaded rod 6, the 6 other end of threaded rod all is vertical direction through pivot and the cooperation of protecting crust 4 and rotates and be connected, the external screw thread has been seted up towards the 1/2 positions outside of the direction of rotation handle 5 in the 6 outside faces of threaded rod, and the 6 external screw threads of threaded rod of both sides are opposite setting, the size of the ring warp of protecting crust 4 can be adjusted through the rotation of rotation handle 5 in this kind of setting, and then the normal winding of transmission line 3 can be guaranteed.
The working process is as follows: in the carrying process of the fiber bragg grating sensor, the fiber bragg grating sensor is used underground, a longer transmission line 3 is needed at the moment, the length of the transmission line 3 can be judged, the transmission line 3 can be wound on the outer side of the protective shell 4 at the moment through rotating the handle 5 and rotating in cooperation with the threaded rods 6 on the two sides, the inner diameter of the protective shell 4 can be adjusted at the moment, the transmission line 3 can be covered inside the placing groove of the protective shell 4, the transmission line 3 can be prevented from being influenced by the external environment and is convenient to carry, messy and damage can be avoided, the transmission line 3 can be positioned on the outer side of the placing groove through the arranged protective pull rope 10 and the elastic connecting rope 11, the transmission line 3 can be protected, the separation from the protective shell 4 can be avoided, when the fiber bragg grating sensor needs to be used, the transmission line 3 can be taken out for use through the separation of the limiting ring 12 and the clamping hook 14, and the setting of the gag lever post 8 and the spacing snap ring 9 that set up can support spacing to detecting contact 7, avoids it to rock at will.
Example 2:
in embodiment 2, the same parts as those in embodiment 1 are not described again, except that when the fiber grating sensor is used, when the sensor body 1 is connected with the transmission line 3, the fiber grating sensor is inserted into the sensor body 1 through one end of the transmission line 3, the protective cover 2 is screwed with the thread on the outer side of the sensor body 1 by rotating the protective cover 2, the protective cover ring 15 on the outer side of the sensor body 1 covers the outer side of the protective cover 2, and the rotary snap ring 16 is rotatably connected with the protective cover 2 through the groove 18, so that the two sealing modes cooperate to ensure that the connection part has good sealing performance, thereby avoiding the influence of the external environment on the connection part, and when the outer side of the transmission line 3 is damaged, the fiber grating sensor can use the spare transmission line 3, the transmission line 3 can be replaced without replacing the whole, thereby saving cost and facilitating use, and the arrangement of the drying plate 17 ensures that the inner part of the protective cover 2 is in a dry environment, ensuring the normal use of the utility model.
The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts of the present invention. The foregoing is only a preferred embodiment of the present invention, and it should be noted that there are objectively infinite specific structures due to the limited character expressions, and it will be apparent to those skilled in the art that a plurality of modifications, decorations or changes may be made without departing from the principle of the present invention, and the technical features described above may be combined in a suitable manner; such modifications, variations, combinations, or adaptations of the invention using its spirit and scope, as defined by the claims, may be directed to other uses and embodiments.
Claims (8)
1. The utility model provides a be applied to fiber grating sensor of stress monitoring in underground, includes sensor body (1) and detects contact (7), its characterized in that: sensor body (1) lower extreme fixedly connected with makes things convenient for the coupling assembling that sensor body (1) and transmission line (3) are connected, sensor body (1) is through coupling assembling and transmission line (3) fixed connection, transmission line (3) other end and detection contact (7) fixed connection, the transmission line (3) outside is equipped with the protection component that has bearing structure, protection component outside one end fixedly connected with gag lever post (8), gag lever post (8) top fixedly connected with spacing snap ring (9).
2. The fiber grating sensor applied to underground stress monitoring of claim 1, wherein: the limiting clamping ring (9) is elastic, and the detecting contact (7) is arranged inside the limiting clamping ring (9).
3. The fiber grating sensor applied to underground stress monitoring of claim 1, wherein: coupling assembling includes protection casing (2) and protection casing ring (15), annular recess (18) have been seted up to the inside bottom of protection casing (2), recess (18) inside rotation is connected with rotates snap ring (16), rotate inside and transmission line (3) fixed connection of snap ring (16), transmission line (3) top plug inserts inside sensor body (1), protection casing (2) top is equipped with protection casing ring (15), the internal thread has been seted up to the inside top of protection casing (2), protection casing (2) are through internal thread and sensor body (1) screwed connection.
4. The fiber grating sensor applied to underground stress monitoring of claim 3, wherein: the protective cover ring (15) is annularly arranged, the lower portion of the protective cover ring (15) is concavely arranged, and the protective cover ring (15) is covered on the outer side of the protective cover (2).
5. The fiber grating sensor applied to underground stress monitoring of claim 3, wherein: the inside drying plate (17) that is equipped with of protection casing (2), drying plate (17) are the annular setting, drying plate (17) set up in transmission line (3) outside.
6. The fiber grating sensor applied to underground stress monitoring of claim 1, wherein: the protection component comprises a protection shell (4) and a rotating handle (5), the protection shell (4) is provided with a rear end face fixedly connected with three protection pull ropes (10), the protection pull ropes (10) are fixedly connected with elastic connection ropes (11), the elastic connection ropes (11) are fixedly connected with limiting rings (12) at the other ends, the limiting rings (12) are internally provided with clamping hooks (14), the clamping hooks (14) are fixedly connected with fixing plates (13) at the rear end faces, and the fixing plates (13) are fixedly connected with the protection shell (4).
7. The fiber grating sensor applied to underground stress monitoring of claim 6, wherein: the protective shell (4) is arranged in an annular shape, a placing groove is formed in the outer side of the protective shell (4), the transmission line (3) wound in the annular shape is arranged in the placing groove, and the protective shell (4) has elasticity.
8. The fiber grating sensor applied to underground stress monitoring of claim 6, wherein: protective housing (4) inside is equipped with rotates handle (5), rotate inside equal screwed connection in handle (5) both sides has threaded rod (6), the threaded rod (6) other end all is vertical direction rotation through pivot and protective housing (4) cooperation and is connected, the external screw thread has been seted up towards the 1/2 position outside of the direction of rotating handle (5) in threaded rod (6) outside face, and threaded rod (6) external screw thread of both sides is opposite setting.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111033130.1A CN113776704A (en) | 2021-09-03 | 2021-09-03 | Fiber grating sensor applied to underground stress monitoring |
| PCT/CN2021/141622 WO2023029313A1 (en) | 2021-09-03 | 2021-12-27 | Fiber bragg grating sensor applied to underground stress monitoring |
| ZA2023/07854A ZA202307854B (en) | 2021-09-03 | 2023-08-11 | A fiber grating sensor for underground stress monitoring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111033130.1A CN113776704A (en) | 2021-09-03 | 2021-09-03 | Fiber grating sensor applied to underground stress monitoring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113776704A true CN113776704A (en) | 2021-12-10 |
Family
ID=78841054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111033130.1A Withdrawn CN113776704A (en) | 2021-09-03 | 2021-09-03 | Fiber grating sensor applied to underground stress monitoring |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN113776704A (en) |
| WO (1) | WO2023029313A1 (en) |
| ZA (1) | ZA202307854B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023029313A1 (en) * | 2021-09-03 | 2023-03-09 | 河北地质大学 | Fiber bragg grating sensor applied to underground stress monitoring |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6337737B1 (en) * | 2001-03-09 | 2002-01-08 | Ciena Corporation | Fiber-Bragg-grating-based strain measuring apparatus, system and method |
| JP3926648B2 (en) * | 2002-03-01 | 2007-06-06 | 東電設計株式会社 | Structural strain measurement equipment |
| JP2008107295A (en) * | 2006-10-27 | 2008-05-08 | Suncall Corp | Optical pressure sensor and its manufacturing method |
| JP4226048B2 (en) * | 2007-08-09 | 2009-02-18 | 株式会社渡辺製作所 | Fiber optic pressure sensor |
| CN101413836B (en) * | 2008-11-26 | 2010-08-11 | 长安大学 | Optical fiber grating soil pressure sensor |
| CN102772200B (en) * | 2012-08-06 | 2013-12-18 | 山东省科学院激光研究所 | Pulse-taking signal sensor probe and optical fiber pulse-taking information acquisition system |
| CN104697682A (en) * | 2014-04-04 | 2015-06-10 | 南京大学（苏州）高新技术研究院 | Fiber Bragg grating strain-measuring method and fiber Bragg grating strain sensor |
| CN110044526B (en) * | 2019-05-10 | 2020-06-02 | 吉林大学 | Fiber grating stress sensor and processing and calibration method thereof |
| CN210513488U (en) * | 2019-10-10 | 2020-05-12 | 深圳市基础工程有限公司 | Fiber grating soil pressure sensor with temperature compensation function |
| CN110940444A (en) * | 2019-12-06 | 2020-03-31 | 石家庄铁道大学 | Fiber grating soil pressure sensor |
| CN211401504U (en) * | 2020-01-03 | 2020-09-01 | 中国人民解放军军事科学院国防工程研究院工程防护研究所 | Mortar type optical fiber concrete stress sensor |
| CN211234794U (en) * | 2020-03-13 | 2020-08-11 | 智物云享(南京)信息科技有限公司 | Novel fiber grating pressure ring |
| CN111855529A (en) * | 2020-07-30 | 2020-10-30 | 中电建南方建设投资有限公司 | Soil body monitoring system and method |
| CN113776704A (en) * | 2021-09-03 | 2021-12-10 | 河北地质大学 | Fiber grating sensor applied to underground stress monitoring |
-
2021
- 2021-09-03 CN CN202111033130.1A patent/CN113776704A/en not_active Withdrawn
- 2021-12-27 WO PCT/CN2021/141622 patent/WO2023029313A1/en unknown
-
2023
- 2023-08-11 ZA ZA2023/07854A patent/ZA202307854B/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023029313A1 (en) * | 2021-09-03 | 2023-03-09 | 河北地质大学 | Fiber bragg grating sensor applied to underground stress monitoring |
Also Published As
| Publication number | Publication date |
|---|---|
| ZA202307854B (en) | 2023-10-25 |
| WO2023029313A1 (en) | 2023-03-09 |
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Application publication date: 20211210 |
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