CN107300364A - A kind of distribution type fiber-optic laying method - Google Patents
A kind of distribution type fiber-optic laying method Download PDFInfo
- Publication number
- CN107300364A CN107300364A CN201710342773.1A CN201710342773A CN107300364A CN 107300364 A CN107300364 A CN 107300364A CN 201710342773 A CN201710342773 A CN 201710342773A CN 107300364 A CN107300364 A CN 107300364A
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- Prior art keywords
- optic
- optical fiber
- distribution type
- laying method
- fiber
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/32—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres
Abstract
A kind of distribution type fiber-optic laying method of the present invention, Step 1: determining spatial resolution needed for monitoring；Step 2: calculating the length of side of network according to the step A spatial resolutions determined；Step 3: cross direction profiles formula fibre optic installations；Step 4: genesis analysis formula fibre optic installations；Step 5: the port incoming fiber optic of cross direction profiles formula optical fiber, genesis analysis formula optical fiber is sensed into analyzer.A kind of distribution type fiber-optic laying method of the present invention, has the advantages that high resolution.
Description
Technical field
The present invention relates to a kind of distributed optical fiber sensing system monitoring method, distribution type fiber-optic is passed more particularly, to a kind of
The method that optical fiber used is laid in sensing system, belongs to technical field of optical fiber.
Background technology
The monitoring principle of distributed optical fiber sensing system is：Sensing responsive element and transmission signal are used optical fibers as simultaneously
Medium, using advanced OTDR technique, detects the temperature along optical fiber diverse location and the change of strain, so as to realize real
Distributed measurement.Distributed optical fiber sensing system is the detection system of a kind of new real-time measurement temperature or stress distribution,
Have the advantages that measurement distance length, measurement accuracy height, accurate positioning, fast response time, type of alarm are flexible.It is extensive in recent years
Applied to fields such as highway communication tunnel, structure of the subway, fire monitoring and high-tension cable temperature monitorings.
The spatial resolution of distributed optical fiber sensing system is general up to 1m；But in some particular surroundings, one-dimensional length
Spatial resolution on degree direction in the range of 1m is difficult to the demand for reaching monitoring.Therefore, distributing optical fiber sensing system how is improved
The problem of spatial resolution of system is in the urgent need to address in engineering.Also there is more scholar to study the problem both at home and abroad,
It is to be used in mixed way from multiple sensors mostly, or by improving hardware, such as LASER Light Source, data collecting card, to lift it
Spatial resolution.However, in actual applications, multiple sensors, which are used in mixed way or improved hardware facility, can all dramatically increase monitoring
The cost of system.
At present, the laying method of conventional distribution type fiber-optic is directly to be laid along measurand by one-dimensional square mostly,
This method is simple, efficient；But, it is this one-dimensional for measurand surface is larger and during higher detection requirement spatial resolution
System of laying is difficult to reach required resolution ratio, needs badly and makes improvements.
The content of the invention
It is an object of the invention to overcome above-mentioned deficiency, there is provided a kind of distribution type fiber-optic laying method of high resolution.
The object of the present invention is achieved like this：
A kind of distribution type fiber-optic laying method, it is characterised in that：The crisscross laying of two optical fiber constitutes network.
A kind of distribution type fiber-optic laying method of the present invention, methods described includes following step：
Step 1: determining spatial resolution needed for monitoring；
Step 2: calculating the length of side of network according to the step A spatial resolutions determined；
Step 3: cross direction profiles formula fibre optic installations：The laying of cross direction profiles formula optical fiber is open into snakelike coiled structure, the horizontal snake
Shape coiled structure is made up of a plurality of horizontal straightway being parallel to each other, and is between the same side end of adjacent horizontal straightway
Lateral connection section；
Step 4: genesis analysis formula fibre optic installations：Genesis analysis formula optical fiber is laid to the snakelike coiled structure in longitudinal direction, and longitudinal snake
Shape coiled structure lid is placed in step 3 on laterally snakelike coiled structure, and the snakelike coiled structure in the longitudinal direction is parallel to each other by a plurality of
Longitudinal straightway is constituted, and is longitudinally connected section between the same side end of adjacent longitudinal straightway；Longitudinal direction in step 4
Straightway is covered on the horizontal straightway in step 3 and constitutes network；
Step 5: the port incoming fiber optic of cross direction profiles formula optical fiber, genesis analysis formula optical fiber is sensed into analyzer；
A kind of distribution type fiber-optic laying method of the present invention, the length of side of the network is less than 3m.
A kind of distribution type fiber-optic laying method of the present invention, the side size range of the network is（0.0001m,
0.999m）.
A kind of distribution type fiber-optic laying method of the present invention, lateral connection section and longitudinally connected section of fiber lengths are all higher than
0.1m。
A kind of distribution type fiber-optic laying method of the present invention, lateral connection section and the length range of longitudinally connected section of optical fiber are
（1m, 2m）.
A kind of distribution type fiber-optic laying method of the present invention, methods described also includes step 6 and temperature change position is carried out
Positioning, the step 6 includes following step：
Where step a, the temperature change position according to genesis analysis formula optical fiber over its length, temperature change location
" row "；
Where step b, the temperature change position according to cross direction profiles formula optical fiber over its length, temperature change location
" OK "；
" row " and " OK " intersection region in step c, step a and step b is temperature variant area.
Compared with prior art, the beneficial effects of the invention are as follows：
Distribution type fiber-optic is laid composition network by the present invention using two-dimentional crisscross mode, is added and structural plane to be measured
Contact, the temperature or the strain that can be achieved structural plane to be measured are a wide range of, face monitoring, can be effective compared with conventional one-dimentional structure
Improve temperature or the spatial resolution of strain monitoring；And whole laid processes are simple, easy construction, it is easy to large-scale popularization
Utilize.
Brief description of the drawings
Fig. 1 is a kind of schematic diagram of distribution type fiber-optic laying method of the invention.
Fig. 2 be a kind of specific embodiment of distribution type fiber-optic laying method of the invention in region 1,2 and point 3 at it is on the rocks
Cooled region schematic diagram
Fig. 3 is that a kind of distribution type fiber-optic laying method of the invention uses the distributing optical fiber sensing point after Fig. 2 refrigerated with ice cases
Analyzer test result；
Wherein：
Fig. 3（a）For the test result after on the rocks on the four edges of region 1
Fig. 3（b）For the test result after on the rocks on the four edges of region 2
Fig. 3（c）For the test result after on the rocks at midpoint 3；
Three figures in Fig. 3 are " temperature change position " figure, represent the temperature value size at different length.
Embodiment
Referring to Fig. 1 ~ 3, a kind of distribution type fiber-optic laying method of the present invention, methods described includes following step：
Step 1: determining spatial resolution needed for monitoring（Spatial resolution is mainly the precision according to required for monitored target
It is determined that, namely it is self-defined according to detection requirement or precision, the numerical value is predefined data）；
Step 2: calculating the length of side of network according to the step A spatial resolutions determined（When spatial resolution is a × b,
The length of side of grid is respectively k × a × b；Wherein k is a constant coefficient, general k=1）；
Step 3: cross direction profiles formula fibre optic installations：The laying of cross direction profiles formula optical fiber is open into snakelike coiled structure, the horizontal snake
Shape coiled structure is made up of a plurality of horizontal straightway being parallel to each other, and is between the same side end of adjacent horizontal straightway
Lateral connection section；
Step 4: genesis analysis formula fibre optic installations：Genesis analysis formula optical fiber is laid to the snakelike coiled structure in longitudinal direction, and longitudinal snake
Shape coiled structure lid is placed in step 3 on laterally snakelike coiled structure, and the snakelike coiled structure in the longitudinal direction is parallel to each other by a plurality of
Longitudinal straightway is constituted, and is longitudinally connected section between the same side end of adjacent longitudinal straightway；Longitudinal direction in step 4
Straightway is covered on the horizontal straightway in step 3 and constitutes network；
Step 5: the port incoming fiber optic of cross direction profiles formula optical fiber, genesis analysis formula optical fiber is sensed into analyzer；
Concretely：
The present invention uses distribution type fiber-optic laying method by two optical fiber（Distribution type fiber-optic）Lay to measurand surface, lay
Method will two distribution type fiber-optics longitudinally, laterally lay respectively into grid, as shown in figure 1, its utilize distribution type fiber-optic pair
Temperature or the sensitiveness of stress are realized using distribution type fiber-optic to the temperature of structural plane or the monitoring of stress；
In the above-mentioned methods, cross direction profiles formula optical fiber and genesis analysis formula optical fiber are produced from Suzhou Dong Jie Photoelectric Co., Ltd.s
Distributed temperature optical cable for sensing（Model：DJ-GYFHK(B)H1S）, optical fiber sensing analyzer using the Beijing Space epoch point
Cloth optical fiber sensing analyzer（Model：ZWX4-Z）, two distributed temperature optical cable for sensing press vertical and horizontal respectively during experiment
Lay into latticed, the paving location starting point distance from distributing optical fiber sensing analyzer port to two optical cables is 4m；Together
When, in order to lift fiber optic cable monitor positioning precision, this grid each edge length is less than 3m；It is preferred that, grid each edge length is
0.0001m is between 0.999m；As the present embodiment side length of element selects 0.4m（Spacing between the straightway being parallel to each other is
0.4m）, meanwhile, two laterally or longitudinally end of cable closed on are left 1.5m（I.e. the length of linkage section is 1.5m）；
Further, to realize space temperature or stress variation zone location, also include step 6 and temperature change position is entered
Row positioning, it is concretely comprised the following steps：
Step a, the temperature change position according to genesis analysis formula optical fiber over its length（Temperature change position refers to long in optical fiber
The temperature change spent on direction, because optical fiber is the length of optical fiber at the structure surface that is laid in, the diverse location of structure（Relatively
In (FBG) demodulator port）Also it is different, therefore, if structure somewhere temperature change, you can according to temperature change of the optical fiber in length
And search out position at this）, " row " where temperature change location；
Where step b, the temperature change position according to cross direction profiles formula optical fiber over its length, temperature change location
" OK "；
" row " and " OK " intersection region in step c, step a and step b is temperature variant area；
Analyzed with reference to specific embodiment：
Referring to Fig. 2, the cooling on the rocks at region 1,2 and point 3 respectively, then by distributing optical fiber sensing analyzer, is obtained
It is horizontal, the temperature change position of two distribution type fiber-optics in longitudinal direction.
The position result of test distributed temperature sensing optical cable temperature change is as shown in Fig. 3 a, 3b, 3c, wherein Fig. 3 a, 3b
Respectively region 1 in corresponding diagram 2, at region 2 four side refrigerated with ice temperature change result, it is on the rocks cold at the midpoint 3 of Fig. 3 c corresponding diagrams 2
But temperature change result；As seen from Figure 3, according in extension position at the temperature change of distributed temperature optical cable for sensing 1
" vertical " nematic of its temperature change can be determined, further according in extension position at the temperature change of distributed temperature optical cable for sensing 2
It can determine that " transverse direction " of its temperature change is the grid of the temperature change in the intersection region of row and column OK；Therefore use
Distribution type fiber-optic optical cable laying method of the present invention, it can significantly improve the temperature change spatial resolution of temperature sensing optical cable.
In summary, distribution type fiber-optic laying method of the invention, using two distribution type fiber-optics, grid is laid, and is led to
Positioning respectively " row " and " OK " of grid vertical and horizontal position are crossed, it improves the spatial discrimination of monitored target
Rate.So, the present invention effectively overcomes the shortcoming in existing distributed optical fiber sensing system and has high industrial utilization.
The above-described embodiments merely illustrate the principles and effects of the present invention, not for the limitation present invention.It is any ripe
Know the personage of this technology all can carry out modifications and changes under the spirit and scope without prejudice to the present invention to above-described embodiment.Cause
This, those of ordinary skill in the art is complete without departing from disclosed spirit and institute under technological thought such as
Into all equivalent modifications or change, should by the present invention claim be covered.
Claims (7)
1. a kind of distribution type fiber-optic laying method, it is characterised in that：The crisscross laying of two optical fiber constitutes network.
2. a kind of distribution type fiber-optic laying method as claimed in claim 1, it is characterised in that：Methods described includes following steps
Suddenly：
Step 1: determining spatial resolution needed for monitoring；
Step 2: calculating the length of side of network according to the step A spatial resolutions determined；
Step 3: cross direction profiles formula fibre optic installations：The laying of cross direction profiles formula optical fiber is open into snakelike coiled structure, the horizontal snake
Shape coiled structure is made up of a plurality of horizontal straightway being parallel to each other, and is between the same side end of adjacent horizontal straightway
Lateral connection section；
Step 4: genesis analysis formula fibre optic installations：Genesis analysis formula optical fiber is laid to the snakelike coiled structure in longitudinal direction, and longitudinal snake
Shape coiled structure lid is placed in step 3 on laterally snakelike coiled structure, and the snakelike coiled structure in the longitudinal direction is parallel to each other by a plurality of
Longitudinal straightway is constituted, and is longitudinally connected section between the same side end of adjacent longitudinal straightway；Longitudinal direction in step 4
Straightway is covered on the horizontal straightway in step 3 and constitutes network；
Step 5: the port incoming fiber optic of cross direction profiles formula optical fiber, genesis analysis formula optical fiber is sensed into analyzer.
3. a kind of distribution type fiber-optic laying method as claimed in claim 2, it is characterised in that：The length of side of the network is less than
3m。
4. a kind of distribution type fiber-optic laying method as claimed in claim 3, it is characterised in that：The side size range of the network
For（0.0001m, 0.999m）.
5. a kind of distribution type fiber-optic laying method as claimed in claim 2, it is characterised in that：Lateral connection section and longitudinally connected section
The length of optical fiber be all higher than 0.1m.
6. a kind of distribution type fiber-optic laying method as claimed in claim 5, it is characterised in that：Lateral connection section and longitudinally connected section
The length range of optical fiber be（1m, 2m）.
7. a kind of distribution type fiber-optic laying method as claimed in claim 2, it is characterised in that：Methods described also includes step 6
Temperature change position is positioned, the step 6 includes following step：
Where step a, the temperature change position according to genesis analysis formula optical fiber over its length, temperature change location
" row "；
Where step b, the temperature change position according to cross direction profiles formula optical fiber over its length, temperature change location
" OK "；
" row " and " OK " intersection region in step c, step a and step b is temperature variant area.
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| CN201710342773.1A CN107300364A (en) | 2017-05-16 | 2017-05-16 | A kind of distribution type fiber-optic laying method |
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| CN201710342773.1A CN107300364A (en) | 2017-05-16 | 2017-05-16 | A kind of distribution type fiber-optic laying method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108279110A (en) * | 2018-03-27 | 2018-07-13 | 贵州电网有限责任公司 | The synchronous measuring apparatus and measurement method of wind speed profile in a kind of wind-tunnel |
| CN111174934A (en) * | 2020-01-08 | 2020-05-19 | 兰州大学 | Optical fiber monitoring method for damage and degradation process of composite structure interface |
| CN111289139A (en) * | 2020-02-19 | 2020-06-16 | 国网山东省电力公司菏泽供电公司 | Optical fiber temperature measurement abnormal data positioning method based on two-dimensional space |
| CN111366093A (en) * | 2020-03-02 | 2020-07-03 | 哈尔滨工业大学 | Multifunctional distributed optical fiber sensor for road strain test and heat conduction snow melting |
| CN112067155A (en) * | 2020-11-11 | 2020-12-11 | 武汉昊衡科技有限公司 | Lithium battery temperature dynamic monitoring method based on OFDR |
| CN112629701A (en) * | 2020-12-31 | 2021-04-09 | 湖北工业大学 | Pipeline leakage monitoring system based on distributed optical fiber temperature measurement technology and leakage point positioning method |
| CN114370926A (en) * | 2021-12-27 | 2022-04-19 | 华北电力大学 | Optical fiber distributed power transformer vibration sensing system |
| CN114485442A (en) * | 2021-12-29 | 2022-05-13 | 国网新源控股有限公司 | Distributed dam panel deformation measurement method based on fixed-interval optical cables |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108279110A (en) * | 2018-03-27 | 2018-07-13 | 贵州电网有限责任公司 | The synchronous measuring apparatus and measurement method of wind speed profile in a kind of wind-tunnel |
| CN111174934A (en) * | 2020-01-08 | 2020-05-19 | 兰州大学 | Optical fiber monitoring method for damage and degradation process of composite structure interface |
| CN111174934B (en) * | 2020-01-08 | 2022-10-11 | 兰州大学 | Optical fiber monitoring method for interface damage degradation process of composite structure |
| CN111289139A (en) * | 2020-02-19 | 2020-06-16 | 国网山东省电力公司菏泽供电公司 | Optical fiber temperature measurement abnormal data positioning method based on two-dimensional space |
| CN111366093A (en) * | 2020-03-02 | 2020-07-03 | 哈尔滨工业大学 | Multifunctional distributed optical fiber sensor for road strain test and heat conduction snow melting |
| CN111366093B (en) * | 2020-03-02 | 2021-10-19 | 哈尔滨工业大学 | Multifunctional distributed optical fiber sensor for road strain test and heat conduction snow melting |
| CN112067155A (en) * | 2020-11-11 | 2020-12-11 | 武汉昊衡科技有限公司 | Lithium battery temperature dynamic monitoring method based on OFDR |
| CN112629701A (en) * | 2020-12-31 | 2021-04-09 | 湖北工业大学 | Pipeline leakage monitoring system based on distributed optical fiber temperature measurement technology and leakage point positioning method |
| CN114370926A (en) * | 2021-12-27 | 2022-04-19 | 华北电力大学 | Optical fiber distributed power transformer vibration sensing system |
| CN114370926B (en) * | 2021-12-27 | 2023-08-22 | 华北电力大学 | Optical fiber distributed power transformer vibration sensing system |
| CN114485442A (en) * | 2021-12-29 | 2022-05-13 | 国网新源控股有限公司 | Distributed dam panel deformation measurement method based on fixed-interval optical cables |
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Application publication date: 20171027 |