CN208060053U - A kind of science of bridge building fiber grating pressure ring sensor - Google Patents
A kind of science of bridge building fiber grating pressure ring sensor Download PDFInfo
- Publication number
- CN208060053U CN208060053U CN201820202032.3U CN201820202032U CN208060053U CN 208060053 U CN208060053 U CN 208060053U CN 201820202032 U CN201820202032 U CN 201820202032U CN 208060053 U CN208060053 U CN 208060053U
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- Prior art keywords
- fiber grating
- pressure rings
- sensor
- pressure
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Abstract
The utility model discloses a kind of science of bridge building fiber grating pressure ring sensors, including metal fixed column, and several pressure rings being arranged in metal fixed column, the groove body for placing press sensor is provided at the top of pressure rings, press sensor both ends are connected to by fiber grating at plug, by being sealingly connected to external instrument instrument at plug, it is provided with mating outer cover at the top of groove body where press sensor, outer cover is fixedly connected on by fixing screws in pressure rings, and fiber grating is along the circumferential direction or generatrix direction is rigidly pasted onto pressure rings；The utility model mainly uses pressure rings cooperation fiber grating that can make forming fibre-optic grating pressure rings cable tension sensor; with precision height; reliably and with long-term; convenient the features such as part and whole monitoring are carried out to cable; this method is eyes with non-contact method; it is suitable for static and dynamic cable force measurement, can accomplishes round-the-clock in due course sampling, the erosion resistant coating and protection plastic bushing on bridge rope surface is on measurement result without influence.
Description
Technical field
The utility model is related to fiber grating pressure ring sensor, specially a kind of science of bridge building fiber grating pressure rings
Sensor belongs to fiber-optic grating sensor comprehensive application technology and drag-line field of pressure measurement.
Background technology
Currently, Suo Li on-line monitorings mainly use Magnetic Sensor both at home and abroad, but such method precision is not high, and device is easy
It is disturbed；And drag-line, hoist cable, tie-rod length are long, validity period limit for length, the long term monitoring system of traditional electrical quantities sensing equipment composition
System stability, durability and distribution cannot all meet actual requirement of engineering well.
As the invention of great significance of 20th century testing field, fiber grating sensing technology is developed rapidly, and at
Forward position for numerous areas is studied and application direction, but still needs to the breakthrough of the relevant technologies.The advantages of fiber-optic grating sensor main table
It is now：Durability is good, is suitable for long term monitoring；No-spark is suitable for special monitoring field；Both a measurement may be implemented, it can also be real
Existing quasi-distributed measurement；Measurement dynamic range is only limited by light source spectrum is wide, and multivalued function problem is not present；Detected level is wavelength
Information, therefore influenced by factors such as splicing losses small；It is insensitive to environmental disturbances, electromagnetism interference；Wavelength-encoding, Ke Yifang
Just absolute measurement etc. is realized.Exactly these features, fiber grating sensing technology have the advantages that in cable tension test it is prominent, however
It still has many very difficult problems in the application of Practical Project.
Although optical fiber grating intelligent dragline precision is higher, manufacture craft is complex, and wherein greatest problem is optical fiber
How adaptable with the manufacturing process of existing drag-line grating is,
Utility model content
The technical problems to be solved in the utility model is to overcome the deficiencies of existing technologies, and provides a kind of science of bridge building optical fiber
Grating pressure ring sensor.
In order to solve the above-mentioned technical problem, the utility model provides the following technical solution：
The utility model provides a kind of science of bridge building fiber grating pressure ring sensor, including metal fixed column, and
Several pressure rings being arranged in metal fixed column, pressure rings top are provided with the groove body for placing press sensor, buckling sensing
Device both ends are connected to by fiber grating at plug, main at plug by being sealingly connected to external instrument instrument at plug
For detecting the fiber grating centralized processing of pressure change together in metal fixed column, and by plug it is carried out close
Envelope processing.
As a kind of optimal technical scheme of the utility model, it is provided at the top of the groove body where press sensor mating
Outer cover, outer cover are fixedly connected on by fixing screws in pressure rings, and strain transducer is fixed in pressure rings inside groove by outer cover, is exempted from
Changed by the external world.
As a kind of optimal technical scheme of the utility model, fiber grating is along the circumferential direction or generatrix direction is rigidly pasted
In pressure rings, for fiber grating due to nature, comparison is light crisp, is directly fixed in pressure rings, when pressure rings are received
When changing to external pressure, the variation of fiber grating sensed pressure first, to change the centre wavelength hair of fiber grating receiving
Changing.
The advantageous effect that the utility model is reached is：The utility model mainly uses pressure rings cooperation fiber grating that can make
Make forming fibre-optic grating pressure rings cable tension sensor, there is precision height, reliably and with long-term, the convenient prison that part and entirety are carried out to cable
The features such as survey, this method are eyes with non-contact method, and sensor transmissions power is big, signal is strong, simple in structure, service life is long, overload energy
Power is strong, is suitable for static and dynamic cable force measurement, can accomplish that round-the-clock in due course sampling, the erosion resistant coating on bridge rope surface and protection are moulded
Expect that casing, without influence, and can also test the corrosion condition of cable wire to measurement result.But the measurement result and magnetic circuit of this method
Structure is closely related, and the above results are only suitable in bridge construction, at the coiling of bridge scene, field calibration and temperature-compensating are all difficult.
Description of the drawings
Attached drawing is used to provide a further understanding of the present invention, and a part for constitution instruction, with this practicality
Novel embodiment for explaining the utility model, does not constitute limitations of the present invention together.
In the accompanying drawings：
Fig. 1 is the utility model fiber grating pressure rings sensor internal structural schematic diagram；
Figure label：1, metal fixed column；2, pressure rings；3, outer cover；4, strain transducer；5, plug；6, fixing screws.
Specific implementation mode
The preferred embodiment of the utility model is illustrated below in conjunction with attached drawing, it should be understood that described herein excellent
It selects embodiment to be only used for describing and explaining the present invention, is not used to limit the utility model.
Embodiment：As shown in Figure 1, the utility model provides a kind of science of bridge building fiber grating pressure ring sensor, packet
Metal fixed column 1 is included, and several pressure rings 2 being arranged in metal fixed column 1,2 top of pressure rings is provided with placement buckling
The groove body of sensor 4,4 both ends of press sensor are connected to by fiber grating at plug 5, and fiber grating is along the circumferential direction or female
Line direction is rigidly pasted onto pressure rings 2；By being sealingly connected to external instrument instrument at plug 5；Slot where press sensor 4
It is provided with mating outer cover 3 at the top of body, outer cover 3 is fixedly connected on by fixing screws 6 in pressure rings 2.
Operation principle：
Country's bridge cable uses chill casting pier nose anchor rope, cable body to be turned round with one heart by the identical steel wire of several diameters now
It twists, outer cladding pe sheath is made, the epoxy resin mortar that filling is made of epoxy resin, zinc powder and cast steel ball etc. in anchor cup.It will
Steel wire is implanted into cable body when drag-line makes with the metal fixed column 1 with diameter, and the both ends of metal fixed column 1 pass through the ring in anchor cup
Oxygen mortar is fixed, and is kept compatible deformation with cable body, is formed optical fiber grating intelligent dragline；Several pressure are distributed in metal fixed column
Ring 2 is internally provided with the strain transducer of detectable drag-line pressure in pressure rings 2, leads between strain transducer and instrument and meter
Fiber grating is fixedly connected, and instrument and meter can send identical broadband wave to fiber grating always, when the light on strain transducer
Fine grating has specific centre wavelength, and when fiber grating receives identical signal wavelength, meeting send the wave to instrument and meter
It is long, but when drag-line is by extraneous pressure, pressure rings 2 perceive pressure change, the fiber grating in strain transducer 4
The rapid pressure change that receives forms certain deformation, and the fiber grating deformation of non-adhesive portion restores, and center reflection wavelength is not
Become；And the deformation being pasted onto on strain transducer 4 cannot restore in time, so as to cause the foveal reflex of this part fiber grating
Wavelength shift, therefore will appear two obstructed reflection peaks in this fiber grating and appear in instrument, by measuring this 2 reflections
The wave length shift at peak can be with pressure-strain value；Such fiber-optic grating sensor perceives drag-line stress, to obtain Suo Li, and can
Directly to carry out breakdown diagnosis, with range is big, overall cost is low, the system integration is easy, entirety is damaged with local damage simultaneously
Monitoring and other advantages
2 installation method of pressure rings：
(1) pressure rings 2 fill preceding inspection：First, it is specific to understand pressure rings for PLEASE READ CAREFULLY pressure rings 2, (FBG) demodulator specification
Parameter is familiar with test view and uses operation；Pressure rings 2 are connect with (FBG) demodulator again, are read, whether detection pressure rings work just
Often.Tester display screen should show " temperature ", " strain " at this time.Check pressure rings cable length, pressure rings quantity and optical cable
Whether there is breakage, determines whether pressure rings are damaged or lose in transportational process.
(2) 2 set-up time of pressure rings：Wait for that prestress anchorage cable installs, rope hole is poured in slurry and cement mortar is fully consolidated, and reaches
When desired strength, selection is installed without sleety weather.
(3) it layouts：According to experimental design test request, structure and measuring point are selected.
(4) preparation before installing：According to point position, appropriate cable length pressure rings 2 are selected, scene is transported to.Prepare
Good jack, anchorage, PVC wired hoses, demodulation view.
(5) it installs：When installation, it is consistent that 2 stress surface of pressure rings should press to force direction with tested point.First pressure rings 2 are installed
Metal fixed column 1, steel strand wires or anchor cable are passed through from rope meter centre bore, and rope meter is placed between metal fixed column 1, are placed flat
Surely.It such as finds that geometric eccentricity is excessive to be adjusted immediately.It should return to zero in time after rope meter installation positioning, read initial value.It records
Pressure rings are numbered.
(6) cable protection：Pressure rings optical cable is protected with PVC wired hoses, grooving postpone side slope introduce observation case
It is interior.Nameplate is performed in pressure rings optical cable position, is indicated.And special messenger is sent to be responsible for keeping an eye on, to prevent optical cable because the later stage applies
Work and destroy.
(7) it is measured by test request.
Finally it should be noted that：The preferred embodiment that these are only the utility model, is not limited to this practicality
It is novel, although the utility model is described in detail with reference to the foregoing embodiments, for those skilled in the art,
It still can be with technical scheme described in the above embodiments is modified, or is carried out to which part technical characteristic etc.
With replacement.Within the spirit and principle of the utility model, any modification, equivalent replacement, improvement and so on should all include
It is within the protection scope of the utility model.
Claims (3)
1. a kind of science of bridge building fiber grating pressure ring sensor, which is characterized in that including metal fixed column (1), Yi Jishe
Several pressure rings (2) in metal fixed column (1) are set, the slot for placing press sensor (4) is provided at the top of pressure rings (2)
Body, press sensor (4) both ends are connected to by fiber grating at plug (5), by being sealingly connected to external instrument at plug (5)
Instruments and meters.
2. a kind of science of bridge building according to claim 1 fiber grating pressure ring sensor, which is characterized in that buckling passes
It is provided with mating outer cover (3) at the top of groove body where sensor (4), outer cover (3) is fixedly connected on pressure by fixing screws (6)
On ring (2).
3. a kind of science of bridge building according to claim 1 fiber grating pressure ring sensor, which is characterized in that optical fiber light
Grid are along the circumferential direction or generatrix direction is rigidly pasted onto pressure rings (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820202032.3U CN208060053U (en) | 2018-02-06 | 2018-02-06 | A kind of science of bridge building fiber grating pressure ring sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820202032.3U CN208060053U (en) | 2018-02-06 | 2018-02-06 | A kind of science of bridge building fiber grating pressure ring sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208060053U true CN208060053U (en) | 2018-11-06 |
Family
ID=63993183
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820202032.3U Expired - Fee Related CN208060053U (en) | 2018-02-06 | 2018-02-06 | A kind of science of bridge building fiber grating pressure ring sensor |
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| Country | Link |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109374193A (en) * | 2018-11-21 | 2019-02-22 | 中铁大桥科学研究院有限公司 | A kind of Oversea bridge steel suspended box cofferdam wave lift measuring device and method |
| CN110864840A (en) * | 2019-11-29 | 2020-03-06 | 北京瑞格星科技有限公司 | Cable force measuring sensor |
| CN114235238A (en) * | 2021-12-17 | 2022-03-25 | 桂林理工大学 | Semi-combined pressure ring sensor and design method thereof |
-
2018
- 2018-02-06 CN CN201820202032.3U patent/CN208060053U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109374193A (en) * | 2018-11-21 | 2019-02-22 | 中铁大桥科学研究院有限公司 | A kind of Oversea bridge steel suspended box cofferdam wave lift measuring device and method |
| CN110864840A (en) * | 2019-11-29 | 2020-03-06 | 北京瑞格星科技有限公司 | Cable force measuring sensor |
| CN114235238A (en) * | 2021-12-17 | 2022-03-25 | 桂林理工大学 | Semi-combined pressure ring sensor and design method thereof |
| CN114235238B (en) * | 2021-12-17 | 2024-03-26 | 桂林理工大学 | Semi-combined pressure ring sensor and design method thereof |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181106 |
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| CF01 | Termination of patent right due to non-payment of annual fee |