CN209027704U - Steel construction stress monitoring system based on optical fiber sensing technology - Google Patents
Steel construction stress monitoring system based on optical fiber sensing technology Download PDFInfo
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- CN209027704U CN209027704U CN201821825722.0U CN201821825722U CN209027704U CN 209027704 U CN209027704 U CN 209027704U CN 201821825722 U CN201821825722 U CN 201821825722U CN 209027704 U CN209027704 U CN 209027704U
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Abstract
The utility model discloses a kind of steel construction stress monitoring system based on optical fiber sensing technology comprising sensing unit, the second splice tray, stress mornitoring cabinet；Sensing unit is placed on naval vessel steel construction, and is arranged in parallel；48 core optical cables of each sensing unit are connect with the second splice tray；Second splice tray is connect by 48 core backbone optical cables with the fibre distribution frame in stress mornitoring cabinet；Sensing unit includes concatenated sensor group, and sensor group includes sequentially connected lateral fiber Bragg grating strain sensor, longitudinal fiber Bragg grating strain sensor, fibre grating temperature compensation transducer；Fibre distribution frame, (FBG) demodulator, interchanger, industrial personal computer, ups power are equipped in stress mornitoring cabinet；Fibre distribution frame is connect by optical patchcord with (FBG) demodulator, and (FBG) demodulator is connect with interchanger, and the interchanger is connect by internal cable with industrial personal computer.The utility model can be monitored naval vessel steel construction, so that it is guaranteed that naval vessel steel construction is in normal condition.
Description
Technical field
The utility model belongs to Ship Steel monitoring structural health conditions field, and in particular to a kind of steel based on optical fiber sensing technology
Structural stress monitors system.
Background technique
Structural health monitoring technology based on fiber grating sensing technology is one kind with fiber-optic grating sensor, optical fiber light
Grid (FBG) demodulator is the advanced detection technique of core equipment.Structural health monitoring technology originates from aerospace field earliest, nowadays
It has been widely used in the engineering structures such as rail traffic, highway, bridge, tunnel, oil-gas pipeline, wherein being supervised with bridge structure
Survey, dam safety comprehensive monitoring be most widely used, as the Tsing Ma Bridge in Hong Kong, the Xu Pu bridge in Shanghai, two bridge of wuhan yangtze river,
Jiangyin Yangtse River suspension bridge, Gutianxi River three-level dam, Longyangxia Dam etc..But existing fiber grating sensing technology does not apply to
In the steel construction monitoring on naval vessel.
Because naval vessel is in use, it is easy to happen the behavior of the other influences steel constructions such as collision.Naval vessel steel construction it is normal straight
Connect the normal operation for affecting naval vessel, thus we there is an urgent need to it is a kind of can be to the device that naval vessel steel construction is monitored.
Utility model content
The purpose of this utility model is to provide a kind of steel construction stress monitoring system based on optical fiber sensing technology, is used for
Naval vessel steel construction is monitored, so that it is guaranteed that naval vessel steel construction is in normal condition.
The technical scheme adopted by the utility model is
A kind of steel construction stress monitoring system based on optical fiber sensing technology comprising sensing unit, is answered at the second splice tray
Power detects cabinet, and the sensing unit is placed on naval vessel steel construction, and is arranged in parallel；48 core optical cables of each sensing unit and
The connection of two splice trays；Second splice tray is connect by 48 core backbone optical cables with the fibre distribution frame in stress mornitoring cabinet；
The sensing unit includes concatenated sensor group, and the sensor group includes sequentially connected lateral fiber grating
Strain transducer, longitudinal fiber Bragg grating strain sensor, fibre grating temperature compensation transducer；
Fibre distribution frame, (FBG) demodulator, interchanger, industrial personal computer, ups power are equipped in the stress mornitoring cabinet；The light
Fine distributing frame connect by optical patchcord with (FBG) demodulator, and (FBG) demodulator is connect with interchanger, the interchanger pass through internal cable and
Industrial personal computer connection；The ups power is (FBG) demodulator, interchanger, industrial personal computer power supply.
According to the above scheme, each sensing unit further include single fiber cable, single splice tray, 4 core optical cables, the first splice tray,
48 core optical cables；One end of single fiber cable and the last one sensor group of sensing unit connect, and the other end of single fiber cable passes through
Single splice tray is connect with 4 core optical cables, and 4 core optical cables are connect by the first splice tray with 48 core optical cables；To ensure the transmission of signal.
According to the above scheme, the lateral fiber Bragg grating strain sensor, longitudinal fiber Bragg grating strain sensor, fiber grating
Temperature compensation sensor includes 2 stainless steel substrates, fiber grating sensitizing range, and 2 stainless steel substrates are symmetrical arranged, the light
Fine grating sensitizing range is placed between 2 stainless steel substrates；2 stainless steel substrates are connect with optical fiber respectively, and the stainless base steel
On piece is equipped with a point weld groove, by weld groove by lateral fiber Bragg grating strain sensor, longitudinal fiber Bragg grating strain sensor, optical fiber
Grating temperature compensation sensor is fixed on naval vessel steel construction.The structure cannot can ensure that the accuracy of measurement data, moreover it is possible to really
The stability of structure-preserving.
According to the above scheme, the lateral fiber Bragg grating strain sensor, longitudinal fiber Bragg grating strain sensor, fiber grating
Temperature compensation sensor all has only one central wavelength, and when working sensor, central wavelength can only be floated in a segment
It moves, will not generate and interfere with each other, to ensure that monitoring data are accurate and reliable.
According to the above scheme, display is additionally provided in the stress mornitoring cabinet；The display and industrial personal computer pass through video line
Connection；The ups power is monitor power supply；In order to monitor.
According to the above scheme, the stress mornitoring cabinet is placed in cabin, convenient for operation and monitoring.
By lateral fiber Bragg grating strain sensor, longitudinal fiber Bragg grating strain sensor, optical fiber grating temperature compensation sensing
Device connects to form a sensor group, the corresponding measuring point of each sensor group；It is single that multiple sensor groups are composed in series into sensing
Member, each sensing unit connect to form channel all the way, signal and signal according to single-core fiber of passing in principle that region is concentrated
Between by wave band distinguish；Multiple sensing unit parallel connections are formed into sensor network.
By sensor by pre- networking after, whole system fiber-optic signal is divided into three-level and is connected, first order single fiber cable
Signal is accessed into 4 core optical cables by single splice tray；Signal is accessed 48 core light by the first splice tray by 4 core optical cable of the second level
48 core optical cables of cable, different zones accumulate a 48 core backbone optical cables by the second splice tray；48 core backbone optical cable of the third level
Signal is accessed into the (FBG) demodulator (fiber Bragg grating (FBG) demodulator) in stress monitoring cabinet.
Wideband light source signal is passed through optical cable transmission to sensor module (lateral fiber grating strain by fiber Bragg grating (FBG) demodulator
Sensor, longitudinal fiber Bragg grating strain sensor, fibre grating temperature compensation transducer), the light wave of specific wavelength passes through corresponding
Sensor when will be reflected back, reflecting light carries the information such as strain, temperature at measuring point, utilizes the light point of (FBG) demodulator
Reflected light signal is converted to electric signal by road device and photoelectric conversion module, and calculates the current central wavelength value of reflected light, root
Industrial personal computer is reached according to IP agreement, is converted into digital signal, is stored, shown, inquired, analyze and handled, it certainly can also be independent
Setting display displays data.
The utility model has the beneficial effects that:
It is horizontal by setting sensing unit real time on-line monitoring Ship Steel structural stress, so that the stress for grasping steel construction is special
Sign rule, it is ensured that steel construction long-term safety operation, it is ensured that ship navigation safety；
Technology and administrative staff can be allowed to understand Ship Steel arrangement works by setting sensing unit, (FBG) demodulator, industrial personal computer etc.
State provides data supporting for the judgement of its decision, and naval vessel steel construction service life can be improved.
By setting fibre optical sensor, reliable and stable monitoring data can be obtained, realize life-cycle, long period monitoring, from
And reduce monitoring cost；
Structure is simple, is easy to implement.
Detailed description of the invention
Below in conjunction with accompanying drawings and embodiments, the utility model is described in further detail, in attached drawing:
Fig. 1 is lateral fiber Bragg grating strain sensor, longitudinal fiber Bragg grating strain sensor, optical fiber grating temperature compensation biography
The structural schematic diagram of sensor；
Fig. 2 is the structural schematic diagram of sensing unit；
Fig. 3 is optical cable connection schematic diagram；
Fig. 4 is the structural schematic diagram in stress monitoring cabinet；
Wherein, 1, lateral fiber Bragg grating strain sensor；2, longitudinal fiber Bragg grating strain sensor；3, optical fiber grating temperature
Compensate sensor；4, single fiber cable；5,4 core optical cable；6,48 core optical cable；7, stress monitoring cabinet；8, display；9, interchanger；
10, (FBG) demodulator；11, industrial personal computer；12, ups power；13, fibre distribution frame；14, video line；15, internal cable；16, extranets
Line；17, optical patchcord；18, internal power cord；19, circumscripted power line；20, single splice tray；21, the first splice tray；22,
Two splice trays；23,48 core backbone optical cable；24, cabin；25, stainless steel substrate；26, fiber grating sensitizing range；27, optical fiber；28,
Point weld groove.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only to explain this
Utility model is not used to limit the utility model.
Referring to figures 1-4, a kind of steel construction stress monitoring system based on optical fiber sensing technology comprising sensing unit,
Second splice tray, stress mornitoring cabinet.
Sensing unit is placed on naval vessel steel construction, and is arranged in parallel；48 core optical cables 6 and second of each sensing unit connect
Box 22 connects；Second splice tray 22 is connect by 48 core backbone optical cables 23 with the fibre distribution frame 13 in stress mornitoring cabinet 7.It passes
Sense unit includes concatenated sensor group, and each sensor group includes sequentially connected lateral fiber Bragg grating strain sensor 1, indulges
To fiber Bragg grating strain sensor 2, fibre grating temperature compensation transducer 3.In the preferred embodiment, in order to make sensor and warship
Ship steel structure connection is stronger, keeps monitoring more accurate, lateral fiber Bragg grating strain sensor 1, longitudinal fiber grating strain
Sensor 2, fibre grating temperature compensation transducer 3 are stainless including 2 stainless steel substrates 25, fiber grating sensitizing range 26,2
Steel substrate 25 is symmetrical arranged, and fiber grating sensitizing range 26 is placed between 2 stainless steel substrates 25；2 stainless steel substrates 25 are distinguished
It is connect with optical fiber 27, stainless steel substrate 25 is equipped with 2 weld grooves 28, by weld groove 28 by lateral fiber grating strain sensor
Device 1, longitudinal fiber Bragg grating strain sensor 2, fibre grating temperature compensation transducer 3 are fixed on naval vessel steel construction；Lateral light
Fiber grating strain transducer 1, longitudinal fiber Bragg grating strain sensor 2, fibre grating temperature compensation transducer 2 all have unique one
A central wavelength, when working sensor, central wavelength can only drift about in a segment, will not generate and interfere with each other, to protect
Demonstrate,prove the accuracy of monitoring data.
Stress mornitoring cabinet 7 is placed in cabin 24, interior to be equipped with fibre distribution frame 13, (FBG) demodulator 10, interchanger 9, industry control
Machine 11, display 8, ups power 12.Fibre distribution frame 13 is connect by optical patchcord 17 with (FBG) demodulator 10, can be single according to sensing
First quantity increases multiple (FBG) demodulators；(FBG) demodulator 10 is connect with interchanger 9, and interchanger 9 is connected by internal cable 15 with industrial personal computer 11
It connects, industrial personal computer 11 is connect by video line 14 with display 8, and industrial personal computer 11 is connect with external cable 16；Ups power 12 passes through interior
Portion's power supply line 18 is (FBG) demodulator 10, interchanger 9, industrial personal computer 11, the power supply of display 8；Ups power 12 by circumscripted power line 19 with
External power supply connection.
For the stability of signal transmission, each sensing unit further includes single fiber cable 4, single splice tray 20,4 core optical cables
5, the first splice tray 21,48 core optical cables 6；The optical fiber 27 of the last one sensor group of one end and sensing unit of single fiber cable 4
The other end of connection, single fiber cable 4 is connect by the core of single splice tray 20 and 4 optical cable 5, and 4 core optical cables 5 pass through the first splice tray 21
It is connect with 48 core optical cables 6.
Lateral fiber Bragg grating strain sensor 1, longitudinal fiber Bragg grating strain sensor 2, optical fiber grating temperature compensation are passed
The series connection of sensor 3 forms a sensor group, the corresponding measuring point of each sensor group；Multiple sensor groups are composed in series into sensing
Unit, each sensing unit connect to form channel all the way according to single-core fiber of passing in principle that region is concentrated, signal and letter
It is distinguished between number by wave band；Multiple sensing unit parallel connections are formed into sensor network.
After the pre- networking of sensor, whole system fiber-optic signal is divided into three-level and is connected, and first order single fiber cable 4 passes through
Signal is accessed 4 core optical cables 5 by single splice tray 20；Signal is accessed 48 core light by the first splice tray 21 by 4 core optical cable 5 of the second level
48 core optical cables 6 of cable 6, different zones accumulate a 48 core backbone optical cables 23 by the second splice tray 22；48 core master of the third level
Signal is accessed the (FBG) demodulator 10 (fiber Bragg grating (FBG) demodulator) in stress monitoring cabinet 7 by dry optical cable 23.
Wideband light source signal is passed through optical cable transmission to sensor module (lateral fiber Bragg grating strain sensor by (FBG) demodulator 10
1, longitudinal fiber Bragg grating strain sensor 2, fibre grating temperature compensation transducer 3), the light wave of specific wavelength by passing accordingly
It will be reflected back when sensor, reflecting light carries the information such as strain, temperature at measuring point, utilizes the optical branching of (FBG) demodulator 10
Reflected light signal is converted to electric signal by device and photoelectric conversion module, and calculates the current central wavelength value of reflected light, then root
Industrial personal computer 11 is reached according to IP agreement, is converted into digital signal；Industrial personal computer 11 stores data, is shown, is inquired, analyzed and is located
Reason, and data are transmitted to display 8 and are displayed data.
Specific example are as follows:
(1) according to the processing capacity in (FBG) demodulator channel, 4 measuring points are distributed in each channel, i.e. 12 sensors carry out networking；
Lateral fiber Bragg grating strain sensor 1, longitudinal fiber Bragg grating strain sensor 2 and optical fiber grating temperature at each measuring point is mended
Sensor 3 is repaid to be concatenated with single fiber cable 4；
(2) at each measuring point, mash welder is adjusted to suitable electric current, the spot welding at sensor points weld groove will be stainless
Steel substrate 25 and welding for steel structure；
(3) each channel sensor is drawn by single fiber cable 4, and signal is accessed 4 by single splice tray 20 by single fiber cable 4
Core optical cable 5；Signal is accessed 48 core optical cables 6 by the first splice tray 21 by 4 core optical cables 5, and 48 core optical cables 6 of different zones pass through the
Two splice trays 22 accumulate a 48 core backbone optical cables 23；48 core backbone optical cables 23 access signal in stress monitoring cabinet 7
(FBG) demodulator 10；
(4) power supply of equipment is unified in stress monitoring cabinet 7 is provided by ups power 12, and alternating current passes through external power cord 19
After accessing ups power 12, by internal power cord 18, it is output to each equipment；(FBG) demodulator 10 and industrial personal computer 11 is logical in cabinet
News are completed by interchanger 9, and using internal cable 15, (FBG) demodulator 10, interchanger 9, industrial personal computer 11 realize interconnection；Utilize extranets
Line 16 realizes transmission outside industrial computer data；
After 23 incoming fiber optic distributing frame 13 of (5) 48 core backbone optical cable, (FBG) demodulator 10, every light are accessed by optical patchcord 17
Fine wire jumper 17 respectively corresponds 10 1 channels of (FBG) demodulator.Wideband light source signal is passed through optical cable transmission to sensor die by (FBG) demodulator 10
Block, the light wave of specific wavelength will be reflected back when passing through corresponding sensor, and reflecting light carries strain at measuring point, temperature
Reflected light signal is converted to electric signal using the optical splitter and photoelectric conversion module of (FBG) demodulator 10 by the information such as degree, passes through solution
It adjusts the signal processing module of instrument 10 to calculate the current central wavelength value of reflected light, the data of industrial personal computer 11 is reached according to IP agreement
Processing module is converted into digital signal；Industrial personal computer 11 is stored, is inquired, analyzed and is handled, by video line 14 in display
It is shown in 8.
It should be understood that for those of ordinary skills, it can be modified or changed according to the above description,
And all these modifications and variations all should belong to the protection scope of the appended claims for the utility model.
Claims (6)
1. a kind of steel construction stress monitoring system based on optical fiber sensing technology, it is characterised in that: connect including sensing unit, second
Continuous box, stress mornitoring cabinet, the sensing unit is placed on naval vessel steel construction, and is arranged in parallel；48 cores of each sensing unit
Optical cable is connect with the second splice tray；Second splice tray is connected by the fibre distribution frame in 48 core backbone optical cables and stress mornitoring cabinet
It connects；
The sensing unit includes concatenated sensor group, and the sensor group includes sequentially connected lateral fiber grating strain
Sensor, longitudinal fiber Bragg grating strain sensor, fibre grating temperature compensation transducer；
Fibre distribution frame, (FBG) demodulator, interchanger, industrial personal computer, ups power are equipped in the stress mornitoring cabinet；The optical fiber is matched
Coil holder is connect by optical patchcord with (FBG) demodulator, and (FBG) demodulator is connect with interchanger, and the interchanger passes through internal cable and industry control
Machine connection；The ups power is (FBG) demodulator, interchanger, industrial personal computer power supply.
2. the steel construction stress monitoring system according to claim 1 based on optical fiber sensing technology, it is characterised in that: each
Sensing unit further includes single fiber cable, single splice tray, 4 core optical cables, the first splice tray, 48 core optical cables；One end of single fiber cable
It being connect with the last one sensor group of sensing unit, the other end of single fiber cable is connect by single splice tray with 4 core optical cables,
4 core optical cables are connect by the first splice tray with 48 core optical cables.
3. the steel construction stress monitoring system according to claim 1 based on optical fiber sensing technology, it is characterised in that: described
Lateral fiber Bragg grating strain sensor, longitudinal fiber Bragg grating strain sensor, fibre grating temperature compensation transducer include 2
Stainless steel substrate, fiber grating sensitizing range, 2 stainless steel substrates are symmetrical arranged, the fiber grating sensitizing range be placed in 2 it is stainless
Between steel substrate；2 stainless steel substrates are connect with optical fiber respectively, and the stainless steel substrate is equipped with point weld groove, passes through spot welding
Slot fixes lateral fiber Bragg grating strain sensor, longitudinal fiber Bragg grating strain sensor, fibre grating temperature compensation transducer
On naval vessel steel construction.
4. the steel construction stress monitoring system according to claim 1 or 3 based on optical fiber sensing technology, it is characterised in that:
The transverse direction fiber Bragg grating strain sensor, longitudinal fiber Bragg grating strain sensor, fibre grating temperature compensation transducer have
There is only one central wavelength.
5. the steel construction stress monitoring system according to claim 1 based on optical fiber sensing technology, it is characterised in that: described
Stress mornitoring cabinet is placed in cabin.
6. the steel construction stress monitoring system according to claim 1 based on optical fiber sensing technology, it is characterised in that: described
Display is additionally provided in stress mornitoring cabinet；The display is connect with industrial personal computer by video line；The ups power is display
Power supply.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821825722.0U CN209027704U (en) | 2018-11-07 | 2018-11-07 | Steel construction stress monitoring system based on optical fiber sensing technology |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821825722.0U CN209027704U (en) | 2018-11-07 | 2018-11-07 | Steel construction stress monitoring system based on optical fiber sensing technology |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111089680A (en) * | 2019-12-09 | 2020-05-01 | 北京航天时代光电科技有限公司 | Portable fiber bragg grating pressure detection system and method |
| CN112833950A (en) * | 2021-01-07 | 2021-05-25 | 中国舰船研究设计中心 | Distributed measurement system for complex flow field in steam pipeline based on optical fiber sensing |
| CN113252116A (en) * | 2021-06-28 | 2021-08-13 | 中铁第四勘察设计院集团有限公司 | Online monitoring system for dynamic characteristics of cantilever of contact network and installation method thereof |
| CN113624273A (en) * | 2021-07-06 | 2021-11-09 | 长江三峡通航管理局 | Ship lock miter gate online monitoring system and method |
| CN113933032A (en) * | 2021-09-30 | 2022-01-14 | 武汉理工大学 | Ship lock herringbone door structure health monitoring system and fault diagnosis method |
-
2018
- 2018-11-07 CN CN201821825722.0U patent/CN209027704U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111089680A (en) * | 2019-12-09 | 2020-05-01 | 北京航天时代光电科技有限公司 | Portable fiber bragg grating pressure detection system and method |
| CN112833950A (en) * | 2021-01-07 | 2021-05-25 | 中国舰船研究设计中心 | Distributed measurement system for complex flow field in steam pipeline based on optical fiber sensing |
| CN112833950B (en) * | 2021-01-07 | 2023-05-23 | 中国舰船研究设计中心 | Steam pipeline internal complex flow field distributed measurement system based on optical fiber sensing |
| CN113252116A (en) * | 2021-06-28 | 2021-08-13 | 中铁第四勘察设计院集团有限公司 | Online monitoring system for dynamic characteristics of cantilever of contact network and installation method thereof |
| CN113624273A (en) * | 2021-07-06 | 2021-11-09 | 长江三峡通航管理局 | Ship lock miter gate online monitoring system and method |
| CN113933032A (en) * | 2021-09-30 | 2022-01-14 | 武汉理工大学 | Ship lock herringbone door structure health monitoring system and fault diagnosis method |
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