CN106153226A - A kind of device for monitoring steel strand prestress loss - Google Patents
A kind of device for monitoring steel strand prestress loss Download PDFInfo
- Publication number
- CN106153226A CN106153226A CN201610562419.5A CN201610562419A CN106153226A CN 106153226 A CN106153226 A CN 106153226A CN 201610562419 A CN201610562419 A CN 201610562419A CN 106153226 A CN106153226 A CN 106153226A
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- China
- Prior art keywords
- sensor
- steel strand
- strand wires
- fibre optical
- corrugated tube
- 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.)
- Pending
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 58
- 239000010959 steel Substances 0.000 title claims abstract description 58
- 238000012544 monitoring process Methods 0.000 title claims abstract description 20
- 239000000835 fiber Substances 0.000 claims abstract description 29
- 230000003287 optical effect Effects 0.000 claims abstract description 27
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 239000013307 optical fiber Substances 0.000 claims description 4
- 230000035807 sensation Effects 0.000 claims description 3
- 208000031481 Pathologic Constriction Diseases 0.000 claims description 2
- 210000001215 vagina Anatomy 0.000 claims description 2
- 230000015556 catabolic process Effects 0.000 claims 1
- 238000006731 degradation reaction Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 4
- 238000010276 construction Methods 0.000 abstract description 3
- 230000007774 longterm Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/24—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet
- G01L1/242—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet the material being an optical fibre
- G01L1/243—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet the material being an optical fibre using means for applying force perpendicular to the fibre axis
- G01L1/245—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet the material being an optical fibre using means for applying force perpendicular to the fibre axis using microbending
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The present invention relates to a kind of device for monitoring steel strand prestress loss, including Fibre Optical Sensor, temperature compensation sensor, corrugated tube, pilot protection sleeve pipe, sensor lead, sensor protection pad and light grating demodulation instrument；Described Fibre Optical Sensor steel strand wires length direction along described corrugated tube is laid at described steel strand wires inflection point, described Fibre Optical Sensor is all connected with described light grating demodulation instrument by described sensor lead with described temperature compensation sensor, described light grating demodulation instrument is in order to obtain the wavelength information that sensor acquisition arrives in real time, and then obtains the prestress change situation that steel strand wires are real-time.The present invention can solve the problem that in existing heavy construction prestressed component work progress to loss of prestress lack direct monitoring method problem, easy construction, simple to operate, there is good engineering adaptability.
Description
Technical field
The present invention relates to steel strand prestress loss monitoring field, particularly relate to a kind of for monitoring steel strand prestress
The device of loss.
Background technology
On the one hand, the pre-stress damage monitoring method currently for steel strand wires can only measure stretching end effective prestress, nothing
Method knows the distribution situation of beam body internal steel twisted wire effective prestress.And, current strain transducer mostly is point sensor,
Its measure that scope is shorter and the uncertainty of measurement effect and limitation bigger, it is impossible to realize for prestress wire is long-term
Monitoring；On the other hand, according to the requirement of Practical Project, bellows interior used in construction does not allow major diameter sensor, and
And the steel strand wires in corrugated tube mostly are curve, need sensor itself to bend, i.e. sensor can not use rigidity to encapsulate, and with
A branch of steel strand wires inner wire tension is slided and between steel strand wires and corrugated tube, Frictional Slipping is easily caused foil gauge and wire quilt
Cut up.
Summary of the invention
In view of this, it is an object of the invention to provide a kind of device for monitoring steel strand prestress loss, it is possible to have
Effect realizes the long term monitoring to steel strand prestress loss.
The present invention uses below scheme to realize: a kind of device for monitoring steel strand prestress loss, passes including optical fiber
Sensor, temperature compensation sensor, corrugated tube, pilot protection sleeve pipe, sensor lead, sensor protection pad and light line grating
(FBG) demodulator；Described Fibre Optical Sensor steel strand wires length direction along described corrugated tube is laid in described steel strand wires inflection point
Place, described Fibre Optical Sensor and described temperature compensation sensor are all by described sensor lead and described light grating demodulation instrument
Being connected, described light grating demodulation instrument is in order to obtain the wavelength information that sensor acquisition arrives in real time, and then it is real-time to obtain steel strand wires
Prestress change situation.
Further, described Fibre Optical Sensor is the high-precision optical fiber sensor for surveying strain, is laid in described ripple
On the six roots of sensation steel strand wires of stricture of vagina pipe Internal and external cycle.
Further, described temperature compensation sensor is structure temperature zones of different to be measured in being laid in described corrugated tube,
In order to eliminate the strain measurement error that temperature causes.
Further, described corrugated tube offers a through hole, described Fibre Optical Sensor and described temperature compensation sensor
After laying in described corrugated tube, the described sensor lead being connected with described Fibre Optical Sensor, temperature compensation sensor passes through
Institute's through hole passes described corrugated tube.
Further, described pilot protection sleeve pipe is one section of center shim sheet plastic tube, one end of described plastic tube with
The through hole offered on described corrugated tube is connected, the length of described plastic tube intercept with by described sensor lead from described through hole
Lead to be as the criterion outside beams of concrete.
Further, described sensor protection pad is the circular hollow pad of peripheral six grooves, peripheral six spacing of pad
Equal circle hole groove is harmonious with steel strand wires size, and centre has circular opening, and Circularhole diameter is more than single steel strand diameter；Lay
When described Fibre Optical Sensor and described temperature compensation sensor, described sensor protection pad is inserted in steel strand wires, and is arranged at biography
Sensor two ends, in order to be separated at sensor laying by the steel strand wires in same corrugated tube, make between steel strand wires reserved enough empty
Between, with the sensor protecting described Fibre Optical Sensor and described temperature compensation sensor to cause from the phase mutual friction between steel strand wires
Damage.
Compared with prior art, the method have the advantages that this steel strand prestress loss monitoring device can
Realize the directly monitoring to the loss of component inside steel strand prestress, and experiment Fibre Optical Sensor durability degree used is high and has
Certain bending property, it is possible to adapt to the laying needs of component inside sensor, it is achieved that loses steel strand prestress is long-term
Monitoring.
Accompanying drawing explanation
Fig. 1 is the structure skiagraph of the present invention.
Fig. 2 is the structure transverse face figure of the present invention.
Fig. 3 is that schematic diagram laid by the single steel strand sensor of the present invention.
In figure:
1---Fibre Optical Sensor；2---temperature compensation sensor；3---corrugated tube；4---pilot protection sleeve pipe；5---sensor
Lead-in wire；6---sensor protection pad；7---light grating demodulation instrument；8---steel strand wires.
Detailed description of the invention
Below in conjunction with the accompanying drawings and embodiment the present invention will be further described.
The present embodiment provides a kind of device for monitoring steel strand prestress loss, as it is shown in figure 1, include Fibre Optical Sensor
Device 1, temperature compensation sensor 2, corrugated tube 3, pilot protection sleeve pipe 4, sensor lead 5, sensor protection pad 6 and light
Grating demodulation instrument 7；The described Fibre Optical Sensor 1 steel strand wires 8 length direction along described corrugated tube 3 is laid in described steel strand wires
At inflection point, described Fibre Optical Sensor 1 and described temperature compensation sensor 2 are all by described sensor lead 5 and described light
Grating demodulation instrument 7 is connected, and described light grating demodulation instrument 7 is in order to obtain the wavelength information that sensor acquisition arrives in real time, and then obtains
To the prestress change situation that steel strand wires are real-time.
In the present embodiment, described Fibre Optical Sensor 1 includes that all are for the high-precision optical fiber sensor surveying strain, cloth
It is located on the six roots of sensation steel strand wires of described corrugated tube Internal and external cycle.
In the present embodiment, in described temperature compensation sensor 2 is laid in described corrugated tube, structure temperature to be measured is different
Region, in order to eliminate the strain measurement error that temperature causes.
In the present embodiment, first at Fibre Optical Sensor section, corrugated tube is divided into two, then offers on described corrugated tube 3
One through hole, until described Fibre Optical Sensor 1 with described temperature compensation sensor 2 after laying in described corrugated tube, will be with described light
The described sensor lead 5 that fiber sensor, temperature compensation sensor are connected passes described corrugated tube by institute's through hole.
In the present embodiment, described pilot protection sleeve pipe 4 is one section of center shim sheet plastic tube, the one of described plastic tube
End is connected with the through hole offered on described corrugated tube, and the length of described plastic tube intercepts to lead to described sensor lead from described
Lead at hole be as the criterion outside beams of concrete.
In the present embodiment, described sensor protection pad 6 is the circular hollow pad of peripheral six grooves, peripheral six of pad
The circle hole groove that spacing is equal is harmonious with steel strand wires size, and centre has circular opening, and Circularhole diameter is more than single steel strand diameter；
When laying described Fibre Optical Sensor with described temperature compensation sensor, described sensor protection pad is inserted in steel strand wires, and arranges
In sensor two ends, in order to be separated at sensor laying by the steel strand wires in same corrugated tube, make to stop in advance between steel strand wires
Enough spaces, with the biography protecting described Fibre Optical Sensor and described temperature compensation sensor to cause from the phase mutual friction between steel strand wires
Sensor damages.
The foregoing is only presently preferred embodiments of the present invention, all impartial changes done according to scope of the present invention patent with
Modify, all should belong to the covering scope of the present invention.
Claims (6)
1. the device being used for monitoring steel strand prestress loss, it is characterised in that: include that Fibre Optical Sensor, temperature-compensating pass
Sensor, corrugated tube, pilot protection sleeve pipe, sensor lead, sensor protection pad and light grating demodulation instrument；By described light
Fiber sensor steel strand wires length direction along described corrugated tube is laid at described steel strand wires inflection point, described Fibre Optical Sensor
All it is connected with described light grating demodulation instrument by described sensor lead with described temperature compensation sensor, described smooth line grating
(FBG) demodulator is in order to obtain the wavelength information that sensor acquisition arrives in real time, and then obtains the prestress change situation that steel strand wires are real-time.
A kind of device for monitoring steel strand prestress loss the most according to claim 1, it is characterised in that: described
Fibre Optical Sensor is the high-precision optical fiber sensor for surveying strain, is laid in the six roots of sensation steel strand wires of described corrugated tube Internal and external cycle
On.
A kind of device for monitoring steel strand prestress loss the most according to claim 1, it is characterised in that: described
Temperature compensation sensor is structure temperature zones of different to be measured in being laid in described corrugated tube, and the strain caused in order to eliminate temperature is surveyed
Amount error.
A kind of device for monitoring steel strand prestress loss the most according to claim 1, it is characterised in that: described ripple
A through hole is offered on stricture of vagina pipe, after described Fibre Optical Sensor and described temperature compensation sensor are laid in described corrugated tube, with
The described sensor lead that described Fibre Optical Sensor, temperature compensation sensor are connected passes described corrugated tube by institute's through hole.
A kind of device for monitoring steel strand prestress loss the most according to claim 1, it is characterised in that: described
Pilot protection sleeve pipe is one section of center shim sheet plastic tube, the through hole phase that one end of described plastic tube and described corrugated tube are offered
Even, the length of described plastic tube intercepts to lead to be as the criterion outside beams of concrete from described through hole by described sensor lead.
A kind of device for monitoring steel strand prestress loss the most according to claim 1, it is characterised in that: described biography
Sensor protection pad is the circular hollow pad of peripheral six grooves, circle hole groove that peripheral six spacing of pad are equal and steel strand wires size
Being harmonious, centre has circular opening, and Circularhole diameter is more than single steel strand diameter；Lay described Fibre Optical Sensor and described temperature
When compensating sensor, described sensor protection pad is inserted in steel strand wires, and is arranged at sensor two ends, in order to by same ripple
Steel strand wires in pipe separately, make reserved sufficient space between steel strand wires at sensor laying, with protect described Fibre Optical Sensor and
The sensor degradation that described temperature compensation sensor causes from the phase mutual friction between steel strand wires.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610562419.5A CN106153226A (en) | 2016-07-18 | 2016-07-18 | A kind of device for monitoring steel strand prestress loss |
| CN201611094471.9A CN106969862A (en) | 2016-07-18 | 2016-12-02 | A kind of device for being used to monitor steel strand prestress loss |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610562419.5A CN106153226A (en) | 2016-07-18 | 2016-07-18 | A kind of device for monitoring steel strand prestress loss |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106153226A true CN106153226A (en) | 2016-11-23 |
Family
ID=58060425
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610562419.5A Pending CN106153226A (en) | 2016-07-18 | 2016-07-18 | A kind of device for monitoring steel strand prestress loss |
| CN201611094471.9A Pending CN106969862A (en) | 2016-07-18 | 2016-12-02 | A kind of device for being used to monitor steel strand prestress loss |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611094471.9A Pending CN106969862A (en) | 2016-07-18 | 2016-12-02 | A kind of device for being used to monitor steel strand prestress loss |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN106153226A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107059619A (en) * | 2017-04-12 | 2017-08-18 | 浙锚科技股份有限公司 | A kind of intelligent suspension cable of parallel steel wire bridge |
| CN107478564A (en) * | 2017-06-30 | 2017-12-15 | 石家庄铁道大学 | Prestress anchorage cable corrosion damage monitoring method and device based on Fibre Optical Sensor |
| CN109578079A (en) * | 2019-01-28 | 2019-04-05 | 霍州煤电集团有限责任公司 | A kind of sowing type optical fiber temperature-measurement connecton layout and its wiring method |
| CN111289474A (en) * | 2020-03-11 | 2020-06-16 | 大连理工大学 | Intelligent anchorage device for monitoring corrosion fracture of prestressed steel strand |
| CN111486999A (en) * | 2019-01-26 | 2020-08-04 | 桂林理工大学 | Self-sensing rebar packaging |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109667264B (en) * | 2018-06-26 | 2020-12-11 | 湘潭大学 | Method for installing and protecting fiber grating sensor on ultra-long anchor cable |
| CN110514582A (en) * | 2019-08-27 | 2019-11-29 | 湖南联智桥隧技术有限公司 | A kind of prestress pipe segmentation friction loss detection system and detection method |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2716315Y (en) * | 2004-04-13 | 2005-08-10 | 柳州欧维姆机械股份有限公司 | Anchor cable with sensing optical fibers and cables |
| JP2007297777A (en) * | 2006-04-27 | 2007-11-15 | Nippon Steel Engineering Co Ltd | Cable for suspension structure and measurement system |
| CN201266127Y (en) * | 2008-09-28 | 2009-07-01 | 中冶建筑研究总院有限公司 | Force value monitoring device for steel bundle with bonding pre-stress |
| CN202614430U (en) * | 2011-12-31 | 2012-12-19 | 交通运输部公路科学研究所 | Pre-stress steel-beam along-path stress distribution state testing device |
| CN203688111U (en) * | 2013-12-13 | 2014-07-02 | 中国一冶集团有限公司 | Steel strand stress measurement device for prestressed concrete |
| CN203929292U (en) * | 2014-06-30 | 2014-11-05 | 山西省交通科学研究院 | A kind of prestress anchorage cable stress distribution proving installation |
| CN105113505B (en) * | 2015-09-01 | 2018-02-06 | 中国电建集团贵阳勘测设计研究院有限公司 | Prestressed anchorage cable isolation support mounting structure |
| CN106049291B (en) * | 2016-07-26 | 2018-01-30 | 王家梁 | Hollow force snesor bite type tensioning system and method built in bridge |
-
2016
- 2016-07-18 CN CN201610562419.5A patent/CN106153226A/en active Pending
- 2016-12-02 CN CN201611094471.9A patent/CN106969862A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107059619A (en) * | 2017-04-12 | 2017-08-18 | 浙锚科技股份有限公司 | A kind of intelligent suspension cable of parallel steel wire bridge |
| CN107478564A (en) * | 2017-06-30 | 2017-12-15 | 石家庄铁道大学 | Prestress anchorage cable corrosion damage monitoring method and device based on Fibre Optical Sensor |
| CN107478564B (en) * | 2017-06-30 | 2023-10-24 | 石家庄铁道大学 | Method and device for monitoring corrosion damage of prestressed anchor cable based on optical fiber sensing |
| CN111486999A (en) * | 2019-01-26 | 2020-08-04 | 桂林理工大学 | Self-sensing rebar packaging |
| CN109578079A (en) * | 2019-01-28 | 2019-04-05 | 霍州煤电集团有限责任公司 | A kind of sowing type optical fiber temperature-measurement connecton layout and its wiring method |
| CN111289474A (en) * | 2020-03-11 | 2020-06-16 | 大连理工大学 | Intelligent anchorage device for monitoring corrosion fracture of prestressed steel strand |
| CN111289474B (en) * | 2020-03-11 | 2024-05-07 | 大连理工大学 | Intelligent anchorage device for monitoring corrosion fracture of prestressed steel strand |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106969862A (en) | 2017-07-21 |
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