CN106525860A - Method for monitoring concrete based on Brillouin sensor - Google Patents
Method for monitoring concrete based on Brillouin sensor Download PDFInfo
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- CN106525860A CN106525860A CN201610858066.3A CN201610858066A CN106525860A CN 106525860 A CN106525860 A CN 106525860A CN 201610858066 A CN201610858066 A CN 201610858066A CN 106525860 A CN106525860 A CN 106525860A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2201/00—Features of devices classified in G01N21/00
- G01N2201/08—Optical fibres; light guides
- G01N2201/088—Using a sensor fibre
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Abstract
The invention discloses a method for monitoring a concrete based on a Brillouin sensor. The method comprises the following steps: 1) standard single-mode fiber is buried into concrete, the standard single-mode fiber is connected with Brillouin fiber sensing equipment; 2) the Brillouin fiber sensing equipment records the distribution of temperature and stress along fiber; and 3) the Brillouin fiber sensing equipment sends the data to a computer, calculation is carried out according to the data by the computer, the data is compared with the distribution data of the stress and the temperature, and the temperature and the stress change can be calculated to obtain the result whether cracks are generated or not in the concrete. The operation is simple and convenient, the standard single-mode fiber is arranged in the concrete, the distribution and change of the temperature and the stress in the concrete can be accurately measured, so that the generation of the cracks can be detected when the crack is small, a crack trend is identified when the crack trend is generated, and the usage effect is good.
Description
Technical field
The present invention relates to one kind is in a big way, specifically a kind of sensor based on Brillouin carries out the side of concrete monitoring
Method.
Background technology
Concrete, referred to as " concrete is referred to the general designation of aggregate cementing integral engineered composite material by Binder Materials.
One word of concrete generally said to be referred to and make Binder Materials, sand, masonry aggregate with cement；With water（Additive and admixture can be contained）Press
Certain proportion coordinate, it is agitated obtained by cement concrete, also referred to as normal concrete, it is widely used in civil engineering.Mixed
In the middle of the solidification of solidifying soil, ageing process, because the impact of various physics, chemical reaction, it is possible that expansion, change in concrete
Shape, strain, crackle etc. affect.Generally, the early monitoring of these changes is difficult to realize.Only when becoming serious
When, the deformation of concrete or crackle could be detected by certain means.In recent years, Fibre Optical Sensor is obtained
Significant progress and it is widely applied.The small volume of Fibre Optical Sensor, high precision；It is right in the middle of material easily can be embedded into
Detected inside which.Therefore, Fibre Optical Sensor, particularly distributed fiberoptic sensor have in terms of the monitoring of xoncrete structure
There is very big advantage, but the method using the change of fiber sensor measuring concrete not yet occur.
The content of the invention
It is an object of the invention to provide a kind of method that sensor based on Brillouin carries out concrete monitoring, to solve
The problem proposed in above-mentioned background technology.
For achieving the above object, the present invention provides following technical scheme：
A kind of method that sensor based on Brillouin carries out concrete monitoring, comprises the following steps that：
Step one, standard single-mode fiber is buried in the middle of concrete, and standard single-mode fiber is connected with Brillouin fiber optic sensing equipment
Connect；
Step 2, Brillouin fiber optic sensing equipment will be got off along the temperature of optical fiber and the distribution record of stress；
Step 3, Brillouin fiber optic sensing equipment send the data to computer, and computer is calculated according to data, you can
Go out the stress of inside concrete and the distribution of temperature, and contrasted with the data of stress before and Temperature Distribution, calculate temperature
The change of degree and stress, show whether concrete produces crack.
As further scheme of the invention：Brillouin fiber optic sensing equipment adopts distributed sensor.
As further scheme of the invention：The foil gauge precision of Brillouin fiber optic sensing equipment is hundred a ten thousandths,
The temperature accuracy of Brillouin fiber optic sensing equipment is 0.1 degree Celsius.
Compared with prior art, the invention has the beneficial effects as follows：The present invention is simple to operation, pacifies in the inside of concrete
Equipped with standard single-mode fiber, the transducing part of Brillouin fiber optic sensing equipment adopts the precision of standard single-mode fiber, foil gauge to be
Hundred a ten thousandths, the precision of temperature is 0.1 degree Celsius, can accurately measure the temperature of inside concrete and the distribution of stress
And its change, so as in the less generation that can detect crack in crack, even in the trend that crack only only occurs
When, you can so that this trend to be recognized, using effect is good.
Specific embodiment
The technical scheme of this patent is described in more detail with reference to specific embodiment.
Embodiment 1
A kind of method that sensor based on Brillouin carries out concrete monitoring, comprises the following steps that：
Step one, standard single-mode fiber is buried in the middle of concrete, and standard single-mode fiber is connected with Brillouin fiber optic sensing equipment
Connect, Brillouin fiber optic sensing equipment adopts distributed sensor, and the foil gauge precision of Brillouin fiber optic sensing equipment is million points
One of, the temperature accuracy of Brillouin fiber optic sensing equipment is 0.1 degree Celsius；
Step 2, Brillouin fiber optic sensing equipment will be got off along the temperature of optical fiber and the distribution record of stress；
Step 3, Brillouin fiber optic sensing equipment send the data to computer, and computer is calculated according to data, you can
Go out the stress of inside concrete and the distribution of temperature, and contrasted with the data of stress before and Temperature Distribution, calculate temperature
The change of degree and stress, show whether concrete produces crack.
The present invention operation principle be：Based on the distributed fiberoptic sensor of Brillouin, its transducing part is by common
Single-mode fiber is constituted, relative to other Fibre Optical Sensors such as technology such as grating, D-shape, it is not necessary to through extra process,
Optical fiber will not be damaged in itself, simultaneously because there is no other appurtenances, its volume also energy minimization.Therefore, in coagulation
The pre-buried aspect of soil has very big advantage.When Brillouin light fiber sensor is buried in the middle of concrete, can be accurate
Temperature, the stress equal distribution along single-mode fiber is measured, the degree of accuracy of temperature is up to 0.1 degree Celsius, and the degree of accuracy of stress is up to
Several microstrains（Millionth deformation）, and position resolution then can up to centimetre even millimeter, that is to say, that two
When the distance between point is more than one centimetre, the parameter such as its stress, temperature can be accurately identified.Therefore, mixed
Between during solidifying soil condensation, the change of its temperature and the change of internal stress accurately can be measured.And mixed
When coagulating native internal possible generation crack, Brillouin light fiber sensor can also sensitively be measured and be answered with distinctive
Power changes, so as in the less generation that can detect crack in crack, even in the trend that crack only only occurs
When, you can so that this trend to be recognized.
Above the better embodiment of this patent is explained in detail, but this patent is not limited to above-mentioned embodiment party
Formula, in the ken that one skilled in the relevant art possesses, can be with the premise of without departing from this patent objective
Make a variety of changes.
Claims (3)
1. a kind of method that sensor based on Brillouin carries out concrete monitoring, it is characterised in that comprise the following steps that：
Step one, standard single-mode fiber is buried in the middle of concrete, and standard single-mode fiber is connected with Brillouin fiber optic sensing equipment
Connect；
Step 2, Brillouin fiber optic sensing equipment will be got off along the temperature of optical fiber and the distribution record of stress；
Step 3, Brillouin fiber optic sensing equipment send the data to computer, and computer is calculated according to data, you can
Go out the stress of inside concrete and the distribution of temperature, and contrasted with the data of stress before and Temperature Distribution, calculate temperature
The change of degree and stress, show whether concrete produces crack.
2. the method that the sensor based on Brillouin according to claim 1 carries out concrete monitoring, it is characterised in that institute
State Brillouin fiber optic sensing equipment and adopt distributed sensor.
3. the method that the sensor based on Brillouin according to claim 1 and 2 carries out concrete monitoring, its feature exist
In the foil gauge precision of, the Brillouin fiber optic sensing equipment be hundred a ten thousandths, the temperature essence of Brillouin fiber optic sensing equipment
Spend for 0.1 degree Celsius.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610858066.3A CN106525860A (en) | 2016-09-28 | 2016-09-28 | Method for monitoring concrete based on Brillouin sensor |
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|---|---|---|---|
| CN201610858066.3A CN106525860A (en) | 2016-09-28 | 2016-09-28 | Method for monitoring concrete based on Brillouin sensor |
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| CN201610858066.3A Pending CN106525860A (en) | 2016-09-28 | 2016-09-28 | Method for monitoring concrete based on Brillouin sensor |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107843358A (en) * | 2017-12-04 | 2018-03-27 | 中国电建集团中南勘测设计研究院有限公司 | A kind of concrete abrasion early warning system and method |
| CN112505308A (en) * | 2020-10-30 | 2021-03-16 | 江西省港航建设投资集团有限公司 | Concrete monitoring system and monitoring method based on BOTDA sensing optical fiber technology |
| CN112525073A (en) * | 2020-11-19 | 2021-03-19 | 哈尔滨工业大学 | Concrete crack position and width identification method based on Brillouin gain spectrum |
| CN112903019A (en) * | 2021-01-27 | 2021-06-04 | 中国电建集团铁路建设有限公司 | Monitoring and repairing characterization method for self-repairing concrete engineering cracks |
| CN114754666A (en) * | 2022-03-29 | 2022-07-15 | 清华大学 | Concrete dam alkali aggregate reaction deformation monitoring equipment and method |
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| US20030174924A1 (en) * | 2002-03-14 | 2003-09-18 | Tennyson Roderick C. | Monitoring of large structures using brillouin spectrum analysis |
| CN1900434A (en) * | 2006-07-25 | 2007-01-24 | 南京大学 | Distributive optical fiber detecting method and system for prefabricated pile damage |
| CN102095677A (en) * | 2010-12-01 | 2011-06-15 | 浙江大学 | Method for monitoring corrosion cracks of reinforced concrete and sensor |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107843358A (en) * | 2017-12-04 | 2018-03-27 | 中国电建集团中南勘测设计研究院有限公司 | A kind of concrete abrasion early warning system and method |
| CN112505308A (en) * | 2020-10-30 | 2021-03-16 | 江西省港航建设投资集团有限公司 | Concrete monitoring system and monitoring method based on BOTDA sensing optical fiber technology |
| CN112525073A (en) * | 2020-11-19 | 2021-03-19 | 哈尔滨工业大学 | Concrete crack position and width identification method based on Brillouin gain spectrum |
| CN112525073B (en) * | 2020-11-19 | 2022-06-03 | 哈尔滨工业大学 | Structural crack identification method based on Brillouin gain spectrum characteristic parameters |
| CN112903019A (en) * | 2021-01-27 | 2021-06-04 | 中国电建集团铁路建设有限公司 | Monitoring and repairing characterization method for self-repairing concrete engineering cracks |
| CN114754666A (en) * | 2022-03-29 | 2022-07-15 | 清华大学 | Concrete dam alkali aggregate reaction deformation monitoring equipment and method |
| CN114754666B (en) * | 2022-03-29 | 2022-12-02 | 清华大学 | Concrete dam alkali aggregate reaction deformation monitoring equipment and method |
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