CN209588996U - Suitable for monitoring the fiber-optic grating sensor of reinforcing bar surrounding concrete rust crack strain field - Google Patents
Suitable for monitoring the fiber-optic grating sensor of reinforcing bar surrounding concrete rust crack strain field Download PDFInfo
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- CN209588996U CN209588996U CN201920102358.3U CN201920102358U CN209588996U CN 209588996 U CN209588996 U CN 209588996U CN 201920102358 U CN201920102358 U CN 201920102358U CN 209588996 U CN209588996 U CN 209588996U
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Abstract
A kind of fiber-optic grating sensor suitable for monitoring reinforcing bar surrounding concrete rust crack strain field, including support system, optical fiber fixing system, radial strain measurement sensor, hoop strain measurement sensor, signal demodulating system and data collection system, optical fiber fixing system is arranged in support system, radial strain measurement sensor and hoop strain measurement sensor are interted in optical fiber fixing system, radial strain measurement sensor and hoop strain measurement sensor are connect with signal demodulating system respectively, and signal demodulating system is connected with data collection system.The utility model provides the fiber-optic grating sensor that one kind is easy to operate, the test period is short, at low cost, the radial and circumferential rust crack strain field of energy real-time monitoring reinforcing bar surrounding concrete in situ changes, improve the accuracy and authenticity of result, reducing problem to further investigation concrete durability as caused by steel bar corrosion has vital meaning, provides basic guarantee for durability design in future.
Description
Technical field
The utility model belongs to concrete strain field monitoring field, is related to a kind of suitable for monitoring reinforcing bar surrounding concrete rust
Split the fiber-optic grating sensor of strain field.
Background technique
Concrete is as one of most important construction material in the world today, because of its materials, cost, production technology etc.
Advantage, application are very extensive.It is not only used in various civil engineerings, in the engineerings such as shipbuilding industry, mechanical industry, ocean development
Also it is very important material.Concrete structure under marine environment and deicer salts environmental condition, steel bar corrosion are to influence
The principal element of concrete structure durability.A large amount of concrete structures are since durability deterioration causes serious economic loss, also
Immense pressure and baneful influence are generated to world today's energy supply, environmental pollution and sustainable development.
Concrete structure performance caused by steel bar corrosion is degenerated, and is due to generating corrosive deposit.Corrosion product density is less than
Reinforcing bar generates rust swelling pressure power between reinforcing bar and concrete, causes outside reinforcing bar in rebar surface accumulation and generating body product swelling
The cracking of side concrete is until peel off.In fact, concrete not only bears expansive force radially, also existed simultaneously on circumferential direction
Tensile stress.Therefore, concrete cracking problem caused by steel bar corrosion should be different by the items under multi-axis stress state from concrete
Property damage set out and studied.The variation of radial, the circumferential rust crack strain field of real-time monitoring reinforcing bar surrounding concrete in situ, facilitates
Each side's face data of steel bar corrosion is counted, to predict that the rust crack degree of armored concrete, rust crack time mention under varying environment from now on
For foundation.
Chinese patent Authorization Notice No. CN104567709A, Granted publication date are on January 14th, 2015, entitled " one
The fiber-optic grating sensor patch of Seed King font "；Chinese patent Authorization Notice No. CN205561776U, Granted publication date be
On September 7th, 2016, it is entitled " a kind of fiber grating patch type strain transducer "；Chinese patent Authorization Notice No.
CN107218900A, Granted publication date are on September 29th, 2017, and entitled " one kind is based on fiber grating strain detection technology
PCCP strain testing method ", be all made of in three utility model applications arrangement patch type fiber-optic grating sensor obtain it is to be measured
Data, although the strain of patch type sensor energy real-time monitoring radial direction, can only arrange along single rectilinear direction, cannot obtain
Along the strain of reinforcing bar circumferential direction, the hoop strain field situation of surrounding concrete, is unable to get standard when cannot really reflect rebar corrosion
Really, reliable rust crack degree and rust crack time of the data to predict armored concrete under different situations.
Utility model content
In order to overcome longer the troublesome in poeration of prior art fiber-optic grating sensor, test period, higher cost, Wu Fayuan
The deficiency of the radial and circumferential rust crack strain field variation of position real-time monitoring reinforcing bar surrounding concrete, the utility model provide a kind of behaviour
Work is simply, the test period is short, at low cost, energy real-time monitoring reinforcing bar surrounding concrete in situ is radial and circumferential direction rust crack strain field changes
Fiber-optic grating sensor, improve the accuracy and authenticity of result, to further investigation the concrete as caused by steel bar corrosion it is resistance to
Long property, which reduces problem, vital meaning, provides basic guarantee for durability design in future.
The technical scheme adopted by the utility model to solve the technical problem is as follows:
A kind of fiber-optic grating sensor suitable for monitoring reinforcing bar surrounding concrete rust crack strain field, including support system,
Optical fiber fixing system, radial strain measurement sensor, hoop strain measurement sensor, signal demodulating system and data acquisition system
It unites, the optical fiber fixing system is arranged in the support system, the radial strain measurement sensor and the hoop strain are surveyed
Quantity sensor interts in the optical fiber fixing system, the radial strain measurement sensor and hoop strain measurement sensing
Device is connect with the signal demodulating system respectively, and the signal demodulating system is connected with the data collection system.
Further, the support system includes adaptive frame system, drawknot system, clamping rings and stationary nodes, institute
It states in clamping rings and the adaptive frame system and one-to-one at equal intervals to lay the stationary nodes, the drawknot system and institute
It states optical fiber fixing system junction and lays the stationary nodes, the clamping rings is connected with the drawknot system, the drawknot
System is connected with the adaptive frame system.
Further, the optical fiber fixing system includes radially fixed system and circumferential fixed system, and the optical fiber is fixed
System is hollow tubular structure, and the radially fixed system includes horizontal cross fixed structure and vertical vertical fixed structure, institute
State circumferential fixed system include set the quantity center of circle overlapping, diameter at associated multiple annulus fixed structure, the annulus consolidate
Determine superstructure and is provided with an aperture, the radial strain measurement sensor and the hoop strain measurement sensor from described small
Hole penetrates the annulus fixed structure, along the annulus fixed structure after a circle, then with high viscosity glue pours into the aperture
It is packaged, the radially fixed system overlays on the circumferential fixed system, then is bonded with high viscosity glue at the place of stacking
The radially fixed system.
Further, the radially fixed system surfaces use screw thread process technology, the support system and the optical fiber
Fixed system once melts the type of building up.
The adaptive frame system is stable polygonal structure, if the drawknot system uses arterial highway drawknot fixed knot
Structure, the clamping rings and the stationary nodes shape, size are variable, the clamping rings and the adaptive frame system
On one-to-one laying at equal intervals the stationary nodes for fixing the radially fixed system, the drawknot system and the light
The stationary nodes that fine fixed system junction is laid are for connecting and fixing the circumferential fixed system.
In the utility model, reinforcing bar surrounding concrete rust crack situation, real-time monitoring coagulation are measured using circumferential, radial twin shaft
Native twin shaft rust crack strain field situation, and the rust crack journey of concrete under different situations can be predicted according to gained rust crack strain data
Degree and rust crack time；The present apparatus is fixed by interting radial strain measurement sensor, hoop strain measurement sensor into optical fiber
High viscosity glue package is used in system, ensure that strain gauge sensors do not deform and are displaced in optical fiber fixing system,
Influence the measurement accuracy of rust crack strain in position to be measured；The present apparatus is several in drawknot system and the laying of optical fiber fixing system junction
A stationary nodes prevent circumferential fixed system from rotating in concreting for connecting and fixing circumferential fixed system
Or displacement；Radially fixed system is overlayed circumferential direction by using screw thread process technology to radial fixed system surface by the present apparatus
On fixed system, and radially fixed system is adhesively fixed with high viscosity glue, and in clamping rings and adaptive frame system
On at equal intervals one-to-one laying stationary nodes fixed radial fixed system is straightened, ensure that radially fixed system will not be with concrete
It pours and is subjected to displacement in any direction, influence the monitoring of concrete radial direction rust crack strain field；The present apparatus is by fixing optical fiber
System and support system once melt the type of building up, and guarantee that optical fiber fixing system is generally aligned in the same plane with support system, it is ensured that support
Supporting & stablizing effect of the system to optical fiber fixing system；Clamping rings is fastened on reinforcing bar by the present apparatus, guarantees that the present apparatus is vertical
It is fastened in concrete blinding in reinforcing bar, it is ensured that optical fiber fixing system is close to concrete interface, effectively prevents concrete
The problem of fiber-optic grating sensor shifts when pouring, improves the accuracy of in-situ monitoring and the accuracy of result；The present apparatus can
It is especially every on a sensor to pass through the pitch for changing grating in radial strain measurement sensor and hoop strain measurement sensor
Several distance production reference markers are spaced, the signal intensity of reflection wavelength is caused, demodulating equipment is the variation for passing through Detection wavelength
It derives the strained situation of reference marker position, realizes that controllability is good, accuracy to the real-time monitoring of concrete rust crack strain field
It is high；If multiple gratings are written in the present apparatus again in same root optical fiber, sensor array is constituted, and the grating more being written is for straining not
Sensitivity can also measure multiple physical quantitys (temperature, stress, concentration etc.) simultaneously；The adaptive frame system that the present apparatus uses can
To be the polygonized structures such as quadrangle, or more stable hexagon, it can more be bonded, fix optical fiber circumferential direction fixed structure；
If the drawknot system that the present apparatus uses can be between horizontal cross fixed structure and vertical vertical structure using together or arterial highway
Drawknot fixed structure；The clamping rings and stationary nodes shape, size that the present apparatus uses can be adjusted according to the actual situation.
The beneficial effects of the utility model are mainly manifested in: by the variation of detection fiber grating sensor central wavelength,
The real-time monitoring of radial to reinforcing bar surrounding concrete, circumferential rust crack strain field variation is realized, to predict steel under different condition from now on
The rust crack degree of reinforced concrete and rust crack time lay the foundation, and have structure simple, and high sensitivity, is convenient for peace at anti-electromagnetic interference
Dress, corrosion resistant advantage, there is preferable application value.
Detailed description of the invention
Fig. 1 is the principle schematic diagram of the utility model.
Fig. 2 be the utility model relates to support system principle schematic diagram.
Fig. 3 be the utility model relates to optical fiber fixing system front view.
Fig. 4 be the utility model relates to optical fiber fixing system left view.
Fig. 5 be the utility model relates to optical fiber fixing system top view.
Fig. 6 be the utility model relates to fiber retention structures hollow tubular structure schematic diagram.
Fig. 7 is the optical fiber for being suitable for monitoring reinforcing bar surrounding concrete rust crack strain field that the utility model embodiment 1 provides
The principle schematic diagram of grating sensor.
Fig. 8 is the optical fiber for being suitable for monitoring reinforcing bar surrounding concrete rust crack strain field that the utility model embodiment 2 provides
The principle schematic diagram of grating sensor.
Fig. 9 is the optical fiber for being suitable for monitoring reinforcing bar surrounding concrete rust crack strain field that the utility model embodiment 3 provides
The principle schematic diagram of grating sensor.
In figure: 1-support system；2-optical fiber fixing systems；3-radial strain measurement sensors；4-hoop strains are surveyed
Quantity sensor；5-signal demodulating systems；6-data collection systems；7-concrete blindings；11-adaptive frame systems；
12-drawknot systems；13-clamping rings；14-section fixed points；21-radially fixed systems；22-circumferential fixed systems；
221-annulus fixed structures；211-horizontal cross fixed structures；212-vertical vertical fixed structures.
Specific embodiment
The utility model is further described with reference to the accompanying drawing.
Referring to Fig.1~Fig. 9, a kind of fiber-optic grating sensor suitable for monitoring reinforcing bar surrounding concrete rust crack strain field,
Including support system 1, optical fiber fixing system 2, radial strain measurement sensor 3, hoop strain measurement sensor 4, signal demodulation
System 5, data collection system 6 arrange the optical fiber fixing system 2, the radial strain measurement sensing in the support system 1
Device 3 and the hoop strain measurement sensor 4 are interted in the optical fiber fixing system 2, the radial strain measurement sensor 3
It is connect respectively with the signal demodulating system 5 with the hoop strain measurement sensor 4, the signal demodulating system 5 and described
Data collection system 6 connects.
The support system 1 includes adaptive frame system 11, drawknot system 12, clamping rings 13 and stationary nodes 14,
The adaptive frame system 11 can be used the stable polygonals structure such as quadrangle, hexagon, and the drawknot system 12 can be with
If 14 shape of the clamping rings 13 and the stationary nodes, size are variable, the fixation using arterial highway drawknot fixed structure
One-to-one several described stationary nodes 14 of laying are used to fix institute at equal intervals on annulus 13 and the adaptive frame system 11
Radially fixed system 21 is stated, the drawknot system 12 lays several fixed knots with 2 junction of optical fiber fixing system
Point 14 is described for connecting and fixing the circumferential fixed system 22, the clamping rings 13 and the drawknot system 12 connection
Drawknot system 12 and the adaptive frame system 11 connection, the support system 1 by founding of high strength alloy material at
Type.
The optical fiber fixing system 2 includes radially fixed system 21, circumferential fixed system 22, the optical fiber fixing system 2
For hollow tubular structure, the radially fixed system 21 includes horizontal cross fixed structure 211, vertical vertical fixed structure 212,
21 surface of radially fixed system use screw thread process technology, it is described circumferential direction fixed system 22 include several centers of circle overlapping,
For diameter at the annulus fixed structure 221 of associated multiple, 221 top of annulus fixed structure is provided with an aperture, the radial direction
Strain gauge sensors 3 and the hoop strain measurement sensor 4 penetrate the annulus fixed structure 221, edge from the aperture
The annulus fixed structure 221 is after a circle, then pours into the aperture with high viscosity glue and be packaged, the radially fixed system
System 21 overlays on the circumferential fixed system 22, then bonds the radially fixed system 21 at the place of stacking with high viscosity glue,
The optical fiber fixing system 2 is once molding formed by high rigidity fibre reinforced composites.
The support system 1 and the optical fiber fixing system 2 once melt the type of building up.
A kind of test method suitable for monitoring the fiber-optic grating sensor of reinforcing bar surrounding concrete rust crack strain field, including
Following steps:
Step 1: the preparation of device: according to the required shape and size for pouring test specimen, being embedded in required reinforcing bar in test specimen
Type, diameter and position determine the shape and size of support system 1, the shape of clamping rings 13 and diameter in support system 1,
Number of the ring of annulus fixed structure 211 away from, required annulus fixed structure 211；3 He of radial strain measurement sensor is determined respectively
The length, pitch of fiber grating, measurement step pitch in the hoop strain measurement sensor 4 interted in each annulus fixed structure 211
And accuracy, production obtain one and are suitable for the real-time rust crack strain field of real-time monitoring reinforcing bar surrounding concrete in situ and rust crack prediction
Optical fiber grating sensor apparatus.
Step 2: test specimen pour before preparation: by clamping rings 13 in several fiber-optic grating sensor support systems 1
It is fastened on reinforcing bar every a distance, guarantees that sensor will not be displaced when concrete sample pours, amount to institute's light requirement
The number of fiber grating sensor；It is close to 7 inner wall of concrete mold when placement outside 1 frame of support system, guarantees that fiber grating passes
The entire plane of sensor is put perpendicular to reinforcing bar；By the circumferential direction in radial strain measurement sensor 3 and each annulus fixed structure 211
The fiber grating of strain gauge sensors 4 is connect with several conducting wires respectively, and conducting wire is carefully orderly placed to outside concrete mold 7
Side, prevents from being mixed into concrete mold 7 and is destroyed.
Step 3: preparing concrete sample: concrete raw material property and match ratio are determined, after vibrating, in concrete mould
It is poured in tool 7 and closely knit, notices that adjustment sensor plane is put perpendicular to reinforcing bar always in operating process；Concrete formation
Test specimen is placed and carries out conserving for 28 days at the standard conditions by demoulding afterwards；The concrete conserved is taken out, each fiber grating passes
Sensor is connected with several conducting wires with a signal demodulating system 5, amounts to the number of desired signal demodulating system 5；By signal solution
Adjusting system 5 is connected with data collection system 6 with conducting wire.
Step 4: data acquire: the switch of opening signal demodulating system 5 and data collection system 6 controls initial strain value
After zeroing, corrosion operation is carried out to reinforcing bar using energization accelerating corrosion device or other test methods, starts to carry out to reinforcing bar week
The real-time monitoring in situ that radial, the circumferential rust crack strain field of concrete changes is enclosed, record acquisition, which is powered, to start to concrete rust crack to break
The data of bad process, by testing radial, the circumferential rust crack strain data of the available test specimen reinforcing bar surrounding concrete, finally
Obtain rust crack degree and the rust crack time of armored concrete.
Below using the real-time monitoring ratio of mud 0.53 in situ, match ratio as cement: water: sand: coarse aggregate=1.0:0.53:
The concrete of 2.0:3.0 is right after built-in fiber grating sensor for reinforcing bar surrounding concrete circumferential direction rust crack strain field situation
The work of the utility model illustrates.
The raw material of the embodiment mixing concrete are as follows: cement is 52.5 class a portland cement of P.I, and sand uses fineness mould
The natural river sand that number is 2.64, coarse aggregate use the rubble of 5~20mm continuous grading, and water uses laboratory tap water.Test specimen ruler
Very little is prism 100mm × 100mm × 400mm, the HPB300 steel that the intermediate pre-buried diameter in position is 12mm on the left of test specimen
Muscle, protective layer thickness 20mm.
Before casting concrete, Fig. 2~Fig. 6 and Fig. 9 configuration device components are pressed first.According to the required test specimen ruler poured
Very little 100mm × 100mm × 400mm, a diameter for being embedded in intermediate position on the left of test specimen is the HPB300 reinforcing bar of 12mm, is protected
Covering thickness is 20mm, determines that support system 1 is the regular quadrangle structure of 40mm × 40mm, clamping rings 13 in support system 1
It for one circular configuration of diameter 12.1mm, arrangement annulus fixed structure 211 and is 10mm with lateral extent outside reinforcing bar；According to annulus
Fixed structure 211 only arranges one, determines and does not arrange stationary nodes 14, drawknot in clamping rings 13 and adaptive frame system 11
System 12 and 2 junction of optical fiber fixing system arrange that four stationary nodes 14 are used for clamping rings fixed structure 211；Determine circle
In ring fixing structure 211 intert hoop strain measurement sensor 4 in fiber grating fiber grating length be 314.2mm,
Pitch is 40 μm, 0.1 μm of step pitch of measurement and accuracy are ± 5 μ ε.Since relative to entire concrete sample, optical fiber grating sensing
Device size is smaller, needs to increase frame on the basis of support system 1 and entire concrete mold 7 is close on four side of sensor support arm
Inner wall, so selection makes braced frame 1 as shown in Figure 9.Secondly respectively with aluminum alloy materials one founding support system 1,
With polyester fiberglass Steel material one-step mould optical fiber fixing system 2, finally by the support system 1 and the optical fiber fixing system 2
Once melt the type of building up, production obtains one and is suitable for the real-time rust crack strain field of real-time monitoring reinforcing bar surrounding concrete in situ and rust crack
The optical fiber grating sensor apparatus of prediction.
In casting concrete, first reinforcing bar is strained and fixed with iron wire in the intermediate position in 7 left side of concrete mold, protective layer
With a thickness of 20mm.Then optical fiber grating sensor apparatus is fastened on clamping rings 13 in support system 1 every 90mm distance
It on reinforcing bar, enables starting distance and terminating distance is 20mm, guarantee that sensor will not be displaced when concrete sample pours,
Optical fiber grating sensor apparatus four needed for total；7 inner wall of concrete mold is close on 1 frame of support system, four side when placement, protects
The card entire plane of fiber-optic grating sensor is put perpendicular to reinforcing bar；Radial strain measurement sensor 3 and hoop strain measurement are passed
Fiber grating in sensor 4 is connect with two and a conducting wire respectively, and three conducting wires are carefully orderly placed to outside concrete mold 7
Side, prevents from being mixed into concrete mold 7 and is destroyed.Finally concrete is poured into concrete mold 7, vibration compacting operated
Notice that adjustment sensor plane is put perpendicular to reinforcing bar always in journey；Concrete forms demoulding after one age, is placed on standard
Under the conditions of carry out 28 days conserve；The concrete conserved is taken out, each fiber-optic grating sensor is believed with three conducting wires with one
Number demodulating system 5 connects, and amounts to desired signal demodulating system 5 four；By four signal demodulating systems 5 with a data acquisition system
System 6 is connected with conducting wire.
The switch of opening signal demodulating system 5 and data collection system 6 uses energization after control initial strain value zeroing
Accelerating corrosion device or other test methods carry out corrosion operation to reinforcing bar, start to carry out to reinforcing bar surrounding concrete circumferential direction rust crack
The real-time monitoring in situ of strain field variation, record acquisition, which is powered, to be started to the data of concrete rust crack destructive process, passes through test
The rust crack strain data of the available test specimen reinforcing bar surrounding concrete circumferential direction, the then test parameters that gained concrete rust crack strains
It is as shown in table 1 with test result, reflect the concrete ring to rust crack strain variation and rust crack state.
Table 1
When it is implemented, the utility model to specific device types of spare parts with no restrictions, to concrete sample size,
Reinforcing bar type and diameter with no restrictions, as long as can complete above-mentioned function optical fiber grating sensor apparatus and concrete sample it is equal
It can.
Content described in this specification embodiment is only enumerating for the way of realization conceived to the utility model, this is practical
Novel protection scope should not be construed as being limited to the specific forms stated in the embodiments, the protection scope of the utility model
Including those skilled in the art according to the utility model conceive it is conceivable that equivalent technologies mean.
Claims (5)
1. a kind of fiber-optic grating sensor suitable for monitoring reinforcing bar surrounding concrete rust crack strain field, which is characterized in that described
Fiber-optic grating sensor includes support system, optical fiber fixing system, radial strain measurement sensor, hoop strain measurement sensing
Device, signal demodulating system and data collection system arrange the optical fiber fixing system, the radial strain in the support system
Measurement sensor and the hoop strain measurement sensor are interted in the optical fiber fixing system, and the radial strain measurement passes
Sensor and the hoop strain measurement sensor are connect with the signal demodulating system respectively, the signal demodulating system and described
Data collection system connection.
2. the fiber-optic grating sensor as described in claim 1 for being suitable for monitoring reinforcing bar surrounding concrete rust crack strain field,
It is characterized in that, the support system includes adaptive frame system, drawknot system, clamping rings and stationary nodes, the fixation
It is one-to-one at equal intervals on annulus and the adaptive frame system to lay the stationary nodes, the drawknot system and the optical fiber
The stationary nodes are laid in fixed system junction, and the clamping rings connect with the drawknot system, the drawknot system with
The adaptive frame system connection.
3. the fiber-optic grating sensor as claimed in claim 1 or 2 for being suitable for monitoring reinforcing bar surrounding concrete rust crack strain field,
It is characterized in that, the optical fiber fixing system includes radially fixed system and circumferential fixed system, the optical fiber fixing system is
Hollow tubular structure, the radially fixed system include horizontal cross fixed structure and vertical vertical fixed structure, the circumferential direction
Fixed system includes the overlapping of the setting quantity center of circle, annulus fixed structure of the diameter at associated multiple, the annulus fixed structure
Top is provided with an aperture, and the radial strain measurement sensor and the hoop strain measurement sensor are penetrated from the aperture
The annulus fixed structure along the annulus fixed structure after a circle, then pours into the aperture with high viscosity glue and is sealed
Dress, the radially fixed system overlay on the circumferential fixed system, then bond the diameter at the place of stacking with high viscosity glue
To fixed system.
4. the fiber-optic grating sensor as claimed in claim 1 or 2 for being suitable for monitoring reinforcing bar surrounding concrete rust crack strain field,
It is characterized in that, the radially fixed system surfaces use screw thread process technology, the support system and the fixed system of the optical fiber
The type of building up is melted in unification time.
5. the fiber-optic grating sensor as claimed in claim 2 for being suitable for monitoring reinforcing bar surrounding concrete rust crack strain field,
It is characterized in that, the adaptive frame system is stable polygonal structure, if the drawknot system uses arterial highway drawknot fixed knot
Structure, the clamping rings and the stationary nodes shape, size are variable, the clamping rings and the adaptive frame system
On one-to-one laying at equal intervals the stationary nodes for fixing the radially fixed system, the drawknot system and the light
The stationary nodes that fine fixed system junction is laid are for connecting and fixing the circumferential fixed system.
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| CN201920102358.3U CN209588996U (en) | 2019-01-22 | 2019-01-22 | Suitable for monitoring the fiber-optic grating sensor of reinforcing bar surrounding concrete rust crack strain field |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109781021A (en) * | 2019-01-22 | 2019-05-21 | 浙江工业大学 | The fiber-optic grating sensor predicted for real-time monitoring reinforcing bar surrounding concrete rust crack strain field in situ and rust crack |
| CN114459646A (en) * | 2022-01-20 | 2022-05-10 | 河南科技大学 | Sensitization type temperature self-compensating fiber grating force sensor |
-
2019
- 2019-01-22 CN CN201920102358.3U patent/CN209588996U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109781021A (en) * | 2019-01-22 | 2019-05-21 | 浙江工业大学 | The fiber-optic grating sensor predicted for real-time monitoring reinforcing bar surrounding concrete rust crack strain field in situ and rust crack |
| CN114459646A (en) * | 2022-01-20 | 2022-05-10 | 河南科技大学 | Sensitization type temperature self-compensating fiber grating force sensor |
| CN114459646B (en) * | 2022-01-20 | 2024-02-20 | 河南科技大学 | Sensitization type temperature self-compensating fiber bragg grating force sensor |
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