CN205860999U - A kind of external prestressing based on FBG monitoring system - Google Patents
A kind of external prestressing based on FBG monitoring system Download PDFInfo
- Publication number
- CN205860999U CN205860999U CN201620639323.XU CN201620639323U CN205860999U CN 205860999 U CN205860999 U CN 205860999U CN 201620639323 U CN201620639323 U CN 201620639323U CN 205860999 U CN205860999 U CN 205860999U
- Authority
- CN
- China
- Prior art keywords
- fbg
- temperature sensor
- strain transducer
- external prestressing
- fots
- 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.)
- Expired - Fee Related
Links
Landscapes
- Length Measuring Devices By Optical Means (AREA)
- Optical Transform (AREA)
Abstract
The utility model discloses a kind of based on FBG external prestressing monitoring system, including prestress wire, FBG strain transducer and FBG temperature sensor, wavelength demodulation device, fibre-optic transmission system (FOTS) and data handling system, wherein FBG strain transducer and FBG temperature sensor are connected by Transmission Fibers and are pasted onto steel strand surface, described FBG strain transducer and FBG temperature sensor access wavelength demodulation device by Transmission Fibers, described wavelength demodulation device connects fibre-optic transmission system (FOTS), and described fibre-optic transmission system (FOTS) connects data handling system and monitors in real time.This utility model is adopted and can be realized the real-time monitoring to external prestressing, and measurement result is reliable in real time, and precision is high, can the multinomial content such as monitor stress, strain and temperature, contribute to finding external prestressing damaed cordition in time, adopt remedial measures early, it is to avoid structural damage.
Description
Technical field
This utility model belongs to field of civil engineering, is specifically related to the monitoring of a kind of external prestressing based on FBG
System.
Background technology
External prestressing refers to that presstressed reinforcing steel is arranged in the prestressing force beyond concrete section, and corresponding is tradition
Presstressed reinforcing steel be arranged in member section have bonding or prestressing without bondn, have the advantage that and greatly reduce prestressing force
Friction loss, improves prestressing force benefit；When avoiding internal cloth muscle closeer due to corrugated tube in web, web be difficult to jolt ramming lack
Point；Its state can be checked the most at any time, mend tension loss, replace inefficacy steel bundle；The utilization of external prestressing is permissible
Reduction of erection time, accelerating construction progress, reduce the sectional dimension of component, alleviate the deadweight of component, to save material, increase and cross over energy
Power, working procedure is relatively simple, and casting concrete is more convenient, and quality is easily guaranteed that.The accuracy that loss of prestress is estimated, to body
The security performance of External prestressed structure and serviceability will have a huge impact.If loss of prestress is estimated excessive, in order to protect
Card degree of prestressing, can strengthen tension stress to structure and ensure the value of effective prestress, and actual stress can be higher, produces safety
Risk, also result in the waste of material；Otherwise, if loss of prestress is estimated too small, then local compressive pre-stress can be caused not enough, lead
Cause structure premature rupture, do not reach the effect of precompressed, affect the safety of structure.
At present, in externally pre-stressed concrete structure, generally by amount of deflection, crack and the power of local detection structure
The physical quantitys such as performance parameter, infer the stress of structure, but the stress to presstressed reinforcing steel optional position any time
Detection there is no a set of method of testing accurately and effectively, the effectively pre-of presstressed reinforcing steel cannot be measured the most accordingly rapidly and accurately
Stress value.Fiber Bragg Grating FBG (FBG) sensing technology senses the micro-of external physical quantity by the movement of grid reflection wavelength
Little change, has light weight, volume little, highly sensitive, and electromagnetism interference is strong, and corrosion resistant is turbid, transmission frequency bandwidth, can realize being distributed or
The quasi-distributed measurement of person, the advantages such as in validity period maintenance cost is low, and can realize multinomial contents such as strain, stress and temperature
Monitoring, therefore, be a kind of promising approach of following monitoring structural health conditions.
Utility model content
For defect and the advantage of FBG of prior art, this utility model provides a kind of FBG external prestressing prison
Examining system, can detect external prestressing stress in real time.
The following concrete technical scheme of this utility model employing is attained in that and includes that prestress wire, FBG strain biography
Sensor and FBG temperature sensor, wavelength demodulation device, Transmission Fibers, fibre-optic transmission system (FOTS) and data handling system, wherein, FBG should
Become sensor and FBG temperature sensor connect by Transmission Fibers and be pasted onto steel strand surface, described FBG strain transducer with
FBG temperature sensor accesses wavelength demodulation device by Transmission Fibers, and described wavelength demodulation device connects fibre-optic transmission system (FOTS), described light
Fine transmission system connects data handling system and monitors in real time.
Further, described FBG strain transducer and FBG temperature sensor are connected in series with steel strand wires table by Transmission Fibers
Face, this arrangement makes FBG temperature sensor can measure temperature again can be as the temperature-compensating of FBG strain transducer
Device, eliminates the impact of temperature.
Described FBG strain transducer and FBG temperature sensor are set to 1 and more than 1, and the spacing between sensor is not
Less than 5cm, it is fixed on the steel strand surface through sand papering, described FBG strain transducer and FBG temperature by resin glue and passes
Sensor gauge length is can be 10cm, 30cm, 50cm or 100cm.
Described FBG strain transducer and FBG temperature sensor and Transmission Fibers surface smear epoxy resin, both protected light
Fibre is avoided being destroyed by foreign impacts, also ensures that sensor acts on jointly with steel strand wires, it is ensured that the accuracy of Monitoring Data, and
And prevent the steel strand wires oxidation polished.
Described FBG strain transducer and FBG temperature sensor access wavelength demodulation device, wavelength demodulation device by Transmission Fibers
Incoming fiber optic transmission system, fibre-optic transmission system (FOTS) accesses data handling system, and described data handling system includes non-destructive tests, mould
Type correction and the subsystem such as security evaluation and safe early warning.
This utility model is adopted and can be realized the real-time monitoring to external prestressing, and measurement result is reliable in real time, and precision is high, can supervise
Survey the multinomial contents such as stress, strain and temperature, contribute to finding external prestressing damaed cordition in time, take early to remedy and arrange
Execute, it is to avoid structural damage.
Accompanying drawing explanation
Fig. 1 is the FBG external prestressing monitoring system schematic that this utility model relates to.
Label in figure: 1-steel strand wires, 2-FBG strain transducer, 3-FBG temperature sensor, 4-wavelength demodulation device, 5-transmits
Optical fiber, 6-fibre-optic transmission system (FOTS), 7-data handling system, 8-resin glue, 9-epoxy resin.
Detailed description of the invention
As described in Figure 1, FBG external prestressing of the present utility model monitoring system, including prestress wire 1,
FBG strain transducer 2 and FBG temperature sensor 3, wavelength demodulation device 4, Transmission Fibers 5, fibre-optic transmission system (FOTS) 6 and data process
System 7, wherein FBG strain transducer 2 and FBG temperature sensor 3 is connected by Transmission Fibers 5 and is pasted onto steel strand wires 1 surface,
Described FBG strain transducer 2 and FBG temperature sensor 3 accesses wavelength demodulation device 4, described wavelength demodulation device by Transmission Fibers 5
4 connect fibre-optic transmission system (FOTS) 6, and described fibre-optic transmission system (FOTS) 6 connects data handling system 7 and monitors in real time.
FBG strain transducer 2 and FBG temperature sensor 3 is set to 1 and more than 1, FBG strain transducer 2 and FBG
The gauge length of temperature sensor 3 can be 10cm, 30cm, 50cm or 100cm, at least 5cm of the spacing between sensor.
FBG strain transducer 2 and FBG temperature sensor 3 is connected in series with the steel strand wires through sand papering by Transmission Fibers 5
1 surface, and at FBG strain transducer 2 and FBG temperature sensor 3 and one layer of epoxy resin 9 of Transmission Fibers 5 surface smear, this
Both protected optical fiber, and made again FBG data measured more accurate, more can the stress of reaction structure, thus improve intelligence
The sensitivity of energy reinforcing bar and accuracy, and prevent the steel strand wires 1 of polishing from aoxidizing.
Described FBG strain transducer 2 and FBG temperature sensor 3 accesses wavelength demodulation device 4, wavelength solution by Transmission Fibers 5
Adjusting instrument 4 incoming fiber optic transmission system 6, fibre-optic transmission system (FOTS) 6 accesses data handling system 7, it is achieved monitor in real time.
Described data handling system 7 includes the subsystems such as non-destructive tests, Modifying model and security evaluation and safe early warning.
Above-mentioned for preferred implementation of the present utility model, but those skilled in the art should be understood that without departing from
In the spirit and scope of the present utility model that appended claims is limited, in form and details this utility model is made
The various changes gone out, broadly fall into protection domain of the present utility model.
Claims (7)
1. monitor system based on FBG external prestressing for one kind, it is characterised in that: include prestress wire (1), FBG
Strain transducer (2) and FBG temperature sensor (3), wavelength demodulation device (4), Transmission Fibers (5), fibre-optic transmission system (FOTS) (6) sum
According to processing system (7), wherein FBG strain transducer (2) and FBG temperature sensor (3) are connected by Transmission Fibers (5) and are pasted
On steel strand wires (1) surface, described FBG strain transducer (2) and FBG temperature sensor (3) access wavelength by Transmission Fibers (5)
(FBG) demodulator (4), described wavelength demodulation device (4) connects fibre-optic transmission system (FOTS) (6), and described fibre-optic transmission system (FOTS) (6) connects at data
Reason system (7) monitors in real time.
One the most according to claim 1 monitors system based on FBG external prestressing, it is characterised in that: described
FBG strain transducer (2) and FBG temperature sensor (3) are set to 1 and more than 1, the gauge length of sensor is 10cm, 30cm,
50cm or 100cm, at least 5cm of the spacing between sensor.
One the most according to claim 2 monitors system based on FBG external prestressing, it is characterised in that: described
FBG strain transducer (2) is contacted by Transmission Fibers (5) with FBG temperature sensor (3), and fixes sensor with resin glue (8)
Two ends in steel strand wires (1) surface.
One the most according to claim 2 monitors system based on FBG external prestressing, it is characterised in that: described
Sand papering process is carried out at steel strand wires (1) surface mount sensor.
One the most according to claim 3 monitors system based on FBG external prestressing, it is characterised in that: described
FBG strain transducer (2) and FBG temperature sensor (3) and one layer of epoxy resin (9) of Transmission Fibers (5) surface smear.
One the most according to claim 1 monitors system based on FBG external prestressing, it is characterised in that: described
FBG strain transducer (2) and FBG temperature sensor (3) access wavelength demodulation device (4), then incoming fiber optic by Transmission Fibers (5)
Transmission system (6).
One the most according to claim 1 monitors system based on FBG external prestressing, it is characterised in that: described
Fibre-optic transmission system (FOTS) (6) accesses data handling system (7), monitors in real time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620639323.XU CN205860999U (en) | 2016-06-21 | 2016-06-21 | A kind of external prestressing based on FBG monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620639323.XU CN205860999U (en) | 2016-06-21 | 2016-06-21 | A kind of external prestressing based on FBG monitoring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205860999U true CN205860999U (en) | 2017-01-04 |
Family
ID=57637787
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620639323.XU Expired - Fee Related CN205860999U (en) | 2016-06-21 | 2016-06-21 | A kind of external prestressing based on FBG monitoring system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205860999U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109580057A (en) * | 2019-01-09 | 2019-04-05 | 武汉理工大学 | Lifting airscrew load monitoring system and method based on Built-In Optical-Fiber Sensors Used |
| CN111183085A (en) * | 2017-09-22 | 2020-05-19 | 塔莱斯管理与服务德国有限责任公司 | Method for assembling a rail monitoring element |
| CN116804580A (en) * | 2023-06-07 | 2023-09-26 | 中冶检测认证有限公司 | Monitoring method for nuclear containment prestress steel beam based on fiber bragg grating technology |
-
2016
- 2016-06-21 CN CN201620639323.XU patent/CN205860999U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111183085A (en) * | 2017-09-22 | 2020-05-19 | 塔莱斯管理与服务德国有限责任公司 | Method for assembling a rail monitoring element |
| US11524711B2 (en) | 2017-09-22 | 2022-12-13 | Thales Management & Services Deutschland Gmbh | Method for mounting a rail monitoring element |
| CN109580057A (en) * | 2019-01-09 | 2019-04-05 | 武汉理工大学 | Lifting airscrew load monitoring system and method based on Built-In Optical-Fiber Sensors Used |
| CN116804580A (en) * | 2023-06-07 | 2023-09-26 | 中冶检测认证有限公司 | Monitoring method for nuclear containment prestress steel beam based on fiber bragg grating technology |
| CN116804580B (en) * | 2023-06-07 | 2024-02-02 | 中冶检测认证有限公司 | Monitoring method for nuclear containment prestress steel beam based on fiber bragg grating technology |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9846105B2 (en) | High-durability and long-scale-distance fiber grating sensor and manufacturing method therefor | |
| Luo et al. | Concrete beam crack detection using tapered polymer optical fiber sensors | |
| CN205860999U (en) | A kind of external prestressing based on FBG monitoring system | |
| CN103383246A (en) | High-sensitivity fiber Bragg grating strain sensor | |
| Li et al. | Mechanical property and strain transferring mechanism in optical fiber sensors | |
| CN105158265A (en) | Online detecting device and method for impact damage of composites | |
| Sun et al. | Feasibility study on corrosion monitoring of a concrete column with central rebar using BOTDR | |
| Henault et al. | Qualification of a truly distributed fiber optic technique for strain and temperature measurements in concrete structures | |
| Wang et al. | Strain monitoring of RC members strengthened with smart NSM FRP bars | |
| ITVR20080047A1 (en) | PROCEDURE AND PLANT FOR THE EXTENDED MEASUREMENT AND MONITORING OF THE TENSIONAL STATE OF THE LONG WELDED TRACK (CWR) | |
| Hong et al. | Displacement shape measurement of continuous beam bridges based on long-gauge fiber optic sensing | |
| Weng et al. | Application of fiber bragg grating strain sensors to a centrifuge model of a jacked pile in collapsible loess | |
| CN205688663U (en) | A kind of intelligent reinforcing bar based on FBG | |
| Yan et al. | Fatigue life measuring system using fiber optic sensors for CFRP pantograph upper arm | |
| Yao et al. | Structural cracks detection based on distributed weak FBG | |
| Simon et al. | Long-term measurement of strain in concrete: durability and accuracy of embedded vibrating wire strain gauges | |
| KR101129261B1 (en) | FBGFiber Bragg Gratings Acceleration Sensor for Multi-Point Measuring by Series Connection | |
| KR20210080995A (en) | Apparatus for measuring convergence of slope face using fiber bragg grating sensor | |
| Zhu et al. | Soil nail monitoring using Fiber Bragg Grating sensors during pullout tests | |
| CN114459590A (en) | Non-contact array type distributed optical fiber device and simulation monitoring method thereof | |
| Belarbi et al. | Smart fiber-reinforced polymer rods featuring improved ductility and health monitoring capabilities | |
| Kesavan et al. | Studies on apparent strain using FBG strain sensors for different structural materials | |
| CN217132347U (en) | Non-contact array type distribution optical fiber device | |
| CN105387960A (en) | In-service prestressed reinforcement local position effective stress detection device and measurement method | |
| Raghu et al. | Embedded fibre bragg grating sensors for monitoring the health of concrete structures |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170104 Termination date: 20170621 |