CN204594857U - A kind of FBG metal erosion sensor with temperature compensation function - Google Patents
A kind of FBG metal erosion sensor with temperature compensation function Download PDFInfo
- Publication number
- CN204594857U CN204594857U CN201520337149.9U CN201520337149U CN204594857U CN 204594857 U CN204594857 U CN 204594857U CN 201520337149 U CN201520337149 U CN 201520337149U CN 204594857 U CN204594857 U CN 204594857U
- Authority
- CN
- China
- Prior art keywords
- fbg
- sensor
- steel bar
- swollen
- temperature compensation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The utility model discloses a kind of FBG metal erosion sensor with temperature compensation function, comprise steel bar piece, the center of described steel bar piece is provided with through hole, the symmetria bilateralis of through hole is provided with optical cable fixed orifice, the surface wrap of described steel bar piece arranges FBG and to become rusty swollen sensor, arranges and become rusty the FBG temperature sensor of swollen sensor temperature cross-sensitivity for eliminating FBG in through hole.A kind of FBG metal erosion sensor with temperature compensation function that the utility model provides, the built-in FBG temperature sensor for temperature compensation; FBG becomes rusty, and the encapsulating structure volume of swollen sensor is little, structure is simple; The annular mounting groove of design can prevent the damage of sensor effectively; The FBG pickup groove of design can solve FBG and to become rusty the problem that swollen sensor point of fixity comes off, thus ensures the serviceable life of sensor.
Description
Technical field
The utility model relates to steel bar corrosion health monitoring field in the structures such as bridge, tunnel, dam and building, particularly relates to a kind of FBG metal erosion sensor with temperature compensation function.
Background technology
Reinforced concrete structure durability is better, but when being in the rugged surroundings such as marine environment, reinforcing bar can corrode, and causes the permanance of structure not enough, directly affects integrally-built security and applicability, even cause buildings premature failure.Therefore, the monitoring of reinforcement corrosion degree has important theory significance and using value.
Reinforcement corrosion is electrochemical process in essence, and therefore electrochemical method becomes the essential idea of monitoring reinforcement corrosion, is also the method for current Technical comparing maturation.The electrochemical method of monitoring corrosion of steel mainly contains half-cell prtential method, concrete resistivity method, linear polarization method etc., determines extent of corrosion or the corrosion rate of reinforcing bar by measuring reinforcing bar current potential, concrete resistivity, corrosion electric current density etc.The shortcoming of electrochemical method is: the interference that workload is large, measurement result is easily subject to the extraneous factors such as water percentage, can only qualitatively judge corrosion conditions of reinforcement, directly can not describe the extent of corrosion of reinforcing bar, can not realize quantitative on-line monitoring, some not readily accessible positions are difficult to detect, and the method is difficult to make reflection to early stage slight erosion.
Fibre Optical Sensor has that volume is little, precision is high, electromagnetism interference, corrosion-resistant, be suitable for the privileged site monitoring and other advantages such as concealment part and hazardous location, thus Fibre Optical Sensor have also been obtained and studies widely in monitoring corrosion of steel.K.D.Bennett devises " corrosion fuse " sensing solutions, reinforcement corrosion degree is inferred by the Comparison on Corrosion of reinforcing bar and fuse, but this sensor bulk is large, and cost is high, and corrosion information later with fracture before fuse fracture can not be provided.The people such as Li Xueming adopt electrochemical method to prepare Fibre Optical Sensor for concrete structure reinforcing bars corrosion monitoring, corrosion information is passed to by the sensitive membrane of electro-deposition on fiber core the light wave conducted in optical fiber, thus acquisition corrosion information, this method measuring accuracy is very high, but higher to the technological requirement of plated film, and be difficult to use in Practical Project by range and the restriction in life-span.The people such as J.A.Greene devise pre-stretching strain FBG corrosion sensor, but the degree reduced due to grating strain and the diameter of speed and sheet metal and composition all relevant, influence factor is comparatively complicated, be difficult to the impact of determining separately to corrode, and because FBG stretches in advance, occur even without corrosion, strain also can reduce because of the creep of Relaxation of prestressing and epoxy resin to some extent, is unfavorable for the long term monitoring of reinforcement corrosion.The people such as Jiang Yi propose a kind of FBG corrosion sensor according to the principle of volumetric expansion after steel bar corrosion, but this method affixed points easily comes off, and FBG easily damages.The people such as Li Jun successively propose groove type, two reinforcing bar putting types arranged side by side, cut the FBG corrosion sensors such as formula open, the measuring accuracy of reinforcement corrosion degree is in theory very high, the shortcoming of groove type corrosion sensor is that bimetallic corrosion can accelerate reinforcement corrosion, be difficult to the true corrosion process effectively simulating reinforcing bar, two reinforcing bar putting type arranged side by side FBG corrosion sensors are that corrosion sensor is using the corrosion of two muscle surface of contact as corrosion signal source with the shortcoming cutting formula FBG corrosion sensor open, and actual corrosion is uneven, may first corrode from other face, therefore the early stage corrosion expanding signal in other face is difficult to be captured by FBG.FBG is directly wrapped on structure reinforcing bars by Simon K.T.Grattan, and to measure reinforcement corrosion degree, its shortcoming is that optical fiber affixed points easily comes off.The people such as Othman Sidek improve on same basis, made PDMS coating FBG corrosion sensor, but its optical fiber affixed points equally easily come off.Muhammad Rosdi Abu Hassan has made etching FBG corrosion sensor, the corrosion information at just reinforcing bar and aluminium flake base contacts face place that this Sensor monitoring arrives, and the aluminium flake base of this sensor can affect the corrosion condition of reinforcing bar, in addition, this research is carried out in saltwater environment, there is larger difference with Practical Project environment and excitation.The people such as S.Ali-Alvarez devise fuse type FBG corrosion sensor, and its shortcoming is quantitative, the long term monitoring that can not realize reinforcing bar.
Utility model content
The utility model discloses a kind of FBG metal erosion sensor with temperature compensation function, comprise steel bar piece, described steel bar piece adopts corrosion monitoring position structure reinforcing bars used and is processed into cylindrical, the center of described steel bar piece is provided with through hole, the symmetria bilateralis of through hole is provided with optical cable fixed orifice, the surface wrap of described steel bar piece arranges FBG and to become rusty swollen sensor, arranges and become rusty the FBG temperature sensor of swollen sensor temperature cross-sensitivity for eliminating FBG in through hole.
Described steel bar piece diameter is not less than the bending radius that adopted FBG becomes rusty required by swollen sensor.
Described steel bar piece is also provided with groove, and in groove, fill insulant forms FBG pickup groove.
Described FBG pickup groove insulating material used is not limited to epoxy resin, can be to meet desirable physical mechanical property, electrical insulation capability, stable chemical performance and good material bonding with reinforcing bar.
The become rusty region of swollen sensor of the surface wrap FBG of steel bar piece is provided with annular mounting groove, and the described FBG swollen sensor that becomes rusty is installed in annular mounting groove.
In optical cable fixed orifice, adopt insulating material to fix optical cable makes it seal formation optical cable point of fixity.
Owing to have employed technique scheme, a kind of FBG metal erosion sensor with temperature compensation function that the utility model provides, the built-in FBG temperature sensor for temperature compensation, does not therefore need in outside independent set temperature compensation sensor; FBG becomes rusty, and the encapsulating structure volume of swollen sensor is little, structure is simple; The annular mounting groove of design can prevent the damage of sensor effectively; The design of FBG pickup groove can guarantee that the become rusty point of fixity of swollen sensor of FBG can not come off along with the development of corrosion, thus ensures serviceable life and the reliability of sensor.Therefore, the utility model design the FBG metal erosion sensor with temperature compensation can be used in Reinforcing Steel Bar In Reinforced Concrete Structure corrosion long-term, reliably monitor.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present application or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, the accompanying drawing that the following describes is only some embodiments recorded in the application, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the radial section figure at the utility model steel bar piece annular mounting groove place;
Fig. 2 is the radial section figure at the FBG metal erosion sensor annular mounting groove place with temperature compensation;
Fig. 3 is steel bar piece 1-1 sectional view;
Fig. 4 is the sensor arrangenent diagram of steel bar piece 1-1 section;
Fig. 5 is the FBG metal erosion sensor sand-cement slurry encapsulation figure with temperature compensation.
1, steel bar piece, 2, optical cable fixed orifice, 3, through hole, 4, FBG temperature sensor, 5, FBG becomes rusty swollen sensor, 6, groove, 7, annular mounting groove, 8, optical fiber, 9, optical cable, 10, FBG pickup groove, 11, optical cable point of fixity, 12, sand-cement slurry
Embodiment
For making the technical solution of the utility model and advantage clearly, below in conjunction with the accompanying drawing in the utility model embodiment, clear complete description is carried out to the technical scheme in the utility model embodiment:
A kind of FBG metal erosion sensor with temperature compensation function as Figure 1-5, comprise steel bar piece 1, steel bar piece 1 adopts corrosion monitoring position structure reinforcing bars used and is processed into cylindrical.The center of steel bar piece 1 is provided with through hole 3, the symmetria bilateralis of through hole 3 is provided with optical cable fixed orifice 2, the surface wrap of steel bar piece 1 arranges FBG and to become rusty swollen sensor 5, arranges and become rusty the FBG temperature sensor 4 of Temperature cross-over susceptibility of swollen sensor 5 for eliminating FBG in through hole 3.
Further, steel bar piece 1 is also provided with groove 6, in groove 6, fill insulant forms FBG pickup groove 10.That FBG is directly wrapped on structure reinforcing bars in prior art, to measure reinforcement corrosion degree, its shortcoming is the carrying out along with corrosion, optical fiber affixed points easily comes off and causes sensor failure, the FBG pickup groove 10 arranged in the utility model avoids the problems referred to above, guarantee that the become rusty point of fixity at swollen sensor 5 two ends of FBG can be bonded on FBG pickup groove 10 reliably, and do not come off with the development of steel bar corrosion, therefore, it is possible to guarantee the serviceable life of sensor in Practical Project, reach measuring accuracy and the range of design, improve the reliability of sensor.
Further, the become rusty region of swollen sensor 5 of the surface wrap FBG of steel bar piece 1 is provided with annular mounting groove 7, the described FBG swollen sensor 5 that becomes rusty is installed in annular mounting groove 7.Ensure that FBG becomes rusty the accurate installation of swollen sensor 5, certain protection can be provided to the FBG swollen sensor 5 that becomes rusty simultaneously, prevent from damaging in sand-cement slurry 12 encapsulation process, improve the success ratio of FBG metal erosion sensor production.
Further, the degree of depth of annular mounting groove 7 is not more than the external diameter with overlay optical fiber, and the width of annular mounting groove 7 equals FBG and to become rusty the winding number of turns of swollen sensor 5 and the product with the external diameter of overlay optical fiber.
Further, in optical cable fixed orifice 2, adopt tackifier to fix optical cable makes it seal formation optical cable point of fixity 11.
Embodiment: 1, make FBG metal erosion sensor:
S1: as Fig. 2, shown in Fig. 4, solidify at groove 6 infusion epoxy resin tackifier, the coat of swollen sensor 5 one end of being become rusty by FBG divests 3mm, after optical fiber and adhesive surface being adopted alcohol or acetone cleaning, this section of bare fibre is pasted onto on FBG pickup groove 10, the FBG swollen sensor 5 that becomes rusty applies certain pulling force be closely wrapped in the annular mounting groove 7 of steel bar piece 1, institute's pitch of the laps is several to be determined according to sensitivity and serviceable life, the optical fiber of swollen sensor 5 other end of being become rusty by FBG divests 1-2mm, sticks with glue agent and fixes on FBG pickup groove 10.
S2: make the FBG metal erosion sensor with temperature compensation function
In order to eliminate the Temperature cross-over susceptibility of FBG metal erosion sensor, the FBG temperature sensor 4 of enhanced sensitivity process being placed in through hole 3, ensureing that the two ends of FBG temperature sensor 4 are in free state stressed to avoid.In optical cable fixed orifice 2, fix optical cable with epoxy resin and seal, forming optical cable point of fixity 11.By above-mentioned two steps, produce the FBG metal erosion sensor with temperature compensation.
S3: the through engineering approaches encapsulation with the FBG metal erosion sensor of temperature compensation function
Because optical fiber is relatively fragile; when the FBG metal erosion sensor with temperature compensation function that said method makes directly uses in extensive Construction of Civil Engineering; FBG metal erosion sensor the factor such as is vulnerable to impact, collide with and damages; therefore need when practical engineering application to carry out certain packaging protection to it in advance, during to improve application, bury survival rate underground.
As shown in Figure 5, the FBG metal erosion sensor with temperature compensation function made adopts sand-cement slurry 12 to encapsulate.The match ratio of sand-cement slurry 12 with reference to the concrete match ratio of engineering used, but does not add coarse aggregate.Before sand-cement slurry 12 encapsulates, FBG is become rusty swollen sensor 5, FBG temperature sensor 4 two ends draw respectively by armored optical cable, then the FBG metal erosion sensor with temperature compensation function to be placed in sand-cement slurry 12, make the sand-cement slurry 12 integument thickness around sensor be 2-30mm, complete the through engineering approaches encapsulation of the FBG metal erosion sensor with temperature compensation function.
The above; be only the utility model preferably embodiment; but protection domain of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; be equal to according to the technical solution of the utility model and utility model design thereof and replace or change, all should be encompassed within protection domain of the present utility model.
Claims (4)
1. one kind has the FBG metal erosion sensor of temperature compensation function, it is characterized in that: comprise steel bar piece (1), described steel bar piece (1) adopts corrosion monitoring position structure reinforcing bars used and is processed into cylindrical, the center of described steel bar piece (1) is provided with through hole (3), the symmetria bilateralis of through hole (3) is provided with optical cable fixed orifice (2), the surface wrap of described steel bar piece (1) arranges FBG and to become rusty swollen sensor (5), arrange in through hole (3) and to become rusty the FBG temperature sensor (4) of Temperature cross-over susceptibility of swollen sensor (5) for eliminating FBG.
2. the FBG metal erosion sensor with temperature compensation function according to claim 1, be further characterized in that: described steel bar piece (1) is also provided with groove (6), in groove (6), fill insulant forms FBG pickup groove (10).
3. the FBG metal erosion sensor with temperature compensation function according to claim 1, be further characterized in that: the become rusty region of swollen sensor (5) of the surface wrap FBG of steel bar piece (1) is provided with annular mounting groove (7), the described FBG swollen sensor (5) that becomes rusty is installed in annular mounting groove (7).
4. the FBG metal erosion sensor with temperature compensation function according to claim 1, is further characterized in that: in optical cable fixed orifice (2), adopt tackifier to fix optical cable make it seal formation optical cable point of fixity (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520337149.9U CN204594857U (en) | 2015-05-22 | 2015-05-22 | A kind of FBG metal erosion sensor with temperature compensation function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520337149.9U CN204594857U (en) | 2015-05-22 | 2015-05-22 | A kind of FBG metal erosion sensor with temperature compensation function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204594857U true CN204594857U (en) | 2015-08-26 |
Family
ID=53931002
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520337149.9U Active CN204594857U (en) | 2015-05-22 | 2015-05-22 | A kind of FBG metal erosion sensor with temperature compensation function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204594857U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104849200A (en) * | 2015-05-22 | 2015-08-19 | 宋世德 | FBG (Fiber Bragg Grating) metal corrosion sensor with temperature compensation function and manufacturing method thereof |
-
2015
- 2015-05-22 CN CN201520337149.9U patent/CN204594857U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104849200A (en) * | 2015-05-22 | 2015-08-19 | 宋世德 | FBG (Fiber Bragg Grating) metal corrosion sensor with temperature compensation function and manufacturing method thereof |
| CN104849200B (en) * | 2015-05-22 | 2017-10-27 | 宋世德 | A kind of FBG metal erosion sensors with temperature compensation function and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Fan et al. | Review of fiber optic sensors for corrosion monitoring in reinforced concrete | |
| Majumder et al. | Fibre Bragg gratings in structural health monitoring—Present status and applications | |
| CN101008620B (en) | Method for testing steel corrosion of reinforced concrete members | |
| CN101566580B (en) | Method for monitoring steel bar corrosion state in concrete by stages and sensor | |
| JP4588108B1 (en) | Corrosion sensor device, corrosion sensor device manufacturing method, corrosion detection method, sensor, and sensor manufacturing method | |
| Tang et al. | A review on fiber optic sensors for rebar corrosion monitoring in RC structures | |
| CN102445452B (en) | Method for monitoring of steel bar corrosion in real time | |
| CN101042328B (en) | Monitoring methods for reinforcement corrosion of long period optical fiber grating and sensor thereof | |
| CN103616325B (en) | Light fiber sensor combination is used in a kind of steel reinforced concrete erosion monitoring | |
| CN102288534B (en) | Fiber grating reinforced concrete rusting sensor with temperature compensation | |
| WO2015032364A1 (en) | Long gauge length carbon fiber strain sensing device and testing method therefor | |
| CN109406528B (en) | Optical fiber sensing device for detecting corrosion of steel bar and temperature compensation method thereof | |
| Du et al. | Optical fiber sensing and structural health monitoring technology | |
| CN204594857U (en) | A kind of FBG metal erosion sensor with temperature compensation function | |
| CN103471497A (en) | Intelligent long scale distance strain sensor and manufacturing method thereof | |
| Luo et al. | A review of fiber-optic corrosion sensor in civil engineering | |
| CN104880401A (en) | FBG metal corrosion sensor and manufacturing method thereof | |
| CN210981175U (en) | Embedded fiber grating steel bar corrosion sensor | |
| CN110044976A (en) | For detecting the interdigital capacitive sensor of Q235 corrosion of carbon steel | |
| CN203489836U (en) | Intelligent long-gauge length strain sensor | |
| CN104849200B (en) | A kind of FBG metal erosion sensors with temperature compensation function and preparation method thereof | |
| CN111458281A (en) | Concrete degradation monitoring sensor and system based on piezoelectric impedance technology | |
| Inaudi et al. | Reliability and field testing of distributed strain and temperature sensors | |
| CN108872319B (en) | Corrosion sensor | |
| CN113466115A (en) | Steel bar corrosion monitoring device with temperature self-compensation function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |