CN106525860A - Method for monitoring concrete based on Brillouin sensor - Google Patents

Method for monitoring concrete based on Brillouin sensor Download PDF

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Publication number
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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China
Prior art keywords
brillouin
concrete
temperature
sensing equipment
stress
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CN201610858066.3A
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Chinese (zh)
Inventor
毛渊
李清泉
郭昆
何本考
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Chongqing Light Technology Co Ltd
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Chongqing Light Technology Co Ltd
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Priority to CN201610858066.3A priority Critical patent/CN106525860A/en
Publication of CN106525860A publication Critical patent/CN106525860A/en
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84Systems specially adapted for particular applications
    • G01N21/88Investigating the presence of flaws or contamination
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2201/00Features of devices classified in G01N21/00
    • G01N2201/08Optical fibres; light guides
    • G01N2201/088Using a sensor fibre

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)

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

A kind of method that sensor based on Brillouin carries out concrete monitoring
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.
CN201610858066.3A 2016-09-28 2016-09-28 Method for monitoring concrete based on Brillouin sensor Pending CN106525860A (en)

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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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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CN106525860A true CN106525860A (en) 2017-03-22

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Cited By (5)

* Cited by examiner, † Cited by third party
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
CN103759665A (en) * 2014-01-13 2014-04-30 河海大学 Distributed measurement device and method of pile body deformation of cast-in-place X-type pile
CN104154874A (en) * 2014-08-13 2014-11-19 浙江大学宁波理工学院 Device and method for monitoring corrosion-induced cracking of reinforced concrete based on optical fiber sensing
CN204854648U (en) * 2015-05-28 2015-12-09 河海大学 Distributed optical fiber is used for monitoring devices that panel dam comes to nothing

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN103759665A (en) * 2014-01-13 2014-04-30 河海大学 Distributed measurement device and method of pile body deformation of cast-in-place X-type pile
CN104154874A (en) * 2014-08-13 2014-11-19 浙江大学宁波理工学院 Device and method for monitoring corrosion-induced cracking of reinforced concrete based on optical fiber sensing
CN204854648U (en) * 2015-05-28 2015-12-09 河海大学 Distributed optical fiber is used for monitoring devices that panel dam comes to nothing

Cited By (7)

* Cited by examiner, † Cited by third party
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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Application publication date: 20170322

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