CN106969862A - A kind of device for being used to monitor steel strand prestress loss - Google Patents
A kind of device for being used to monitor steel strand prestress loss Download PDFInfo
- Publication number
- CN106969862A CN106969862A CN201611094471.9A CN201611094471A CN106969862A CN 106969862 A CN106969862 A CN 106969862A CN 201611094471 A CN201611094471 A CN 201611094471A CN 106969862 A CN106969862 A CN 106969862A
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- China
- Prior art keywords
- sensor
- steel strand
- strand wires
- bellows
- fibre optical
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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
- 239000000835 fiber Substances 0.000 claims abstract description 29
- 230000003287 optical effect Effects 0.000 claims abstract description 27
- 239000013307 optical fiber Substances 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 230000035807 sensation Effects 0.000 claims description 3
- 230000015556 catabolic process Effects 0.000 claims 1
- 238000006731 degradation reaction Methods 0.000 claims 1
- 238000012544 monitoring process Methods 0.000 abstract description 7
- 238000010276 construction Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 3
- 238000005259 measurement Methods 0.000 description 4
- 230000007774 longterm Effects 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
- 238000005538 encapsulation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000012360 testing method 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 being used to monitor steel strand prestress loss, including fibre optical sensor, temperature compensation sensor, bellows, pilot protection sleeve pipe, sensor lead, sensor protection pad and light grating demodulation instrument；The fibre optical sensor is laid at the steel strand wires inflection point along the steel strand wires length direction in the bellows, the fibre optical sensor is connected with the temperature compensation sensor by the sensor lead with the light grating demodulation instrument, the light grating demodulation instrument obtains the real-time prestress change situation of steel strand wires to obtain the wavelength information that sensor is collected in real time.The present invention can solve the problem that the problem of lacking direct monitoring method to loss of prestress in existing heavy construction prestressed component work progress, and easy construction is simple to operate, with good engineering adaptability.
Description
Technical field
It is more particularly to a kind of to be used to monitor steel strand prestress the present invention relates to steel strand prestress loss monitoring field
The device of loss.
Background technology
On the one hand, at present, stretching end effective prestress, nothing can only be measured for the pre-stress damage monitoring method of steel strand wires
Method knows the distribution situation of steel strand wires effective prestress inside beam body.Moreover, current strain transducer is generally point sensor,
Its measurement range is shorter and measurement effect uncertain larger with limitation, it is impossible to realize for the long-term of prestress wire
Monitoring；On the other hand, according to the requirement of Practical Project, bellows interior used does not allow major diameter sensor in construction, and
And the steel strand wires in bellows are generally curve, it is necessary to sensor can be bent in itself, i.e., sensor can not be using rigidity encapsulation, and together
Frictional Slipping is easily caused foil gauge and wire quilt between a branch of steel strand wires inner wire tension slip and steel strand wires and bellows
Cut up.
The content of the invention
In view of this, it is an object of the invention to provide a kind of device for being used to monitor steel strand prestress loss, Neng Gouyou
Effect realizes the long term monitoring lost to steel strand prestress.
The present invention is realized using following scheme：A kind of device for being used to monitor steel strand prestress loss, including optical fiber are passed
Sensor, temperature compensation sensor, bellows, pilot protection sleeve pipe, sensor lead, sensor protection pad and light grating
(FBG) demodulator；The fibre optical sensor is laid in the steel strand wires inflection point along the steel strand wires length direction in the bellows
Place, the fibre optical sensor passes through the sensor lead and the light grating demodulation instrument with the temperature compensation sensor
It is connected, the light grating demodulation instrument to obtain the wavelength information that sensor is collected 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 the ripple
On the six roots of sensation steel strand wires of line pipe Internal and external cycle.
Further, described temperature compensation sensor is laid in structure temperature different zones to be measured in the bellows,
To eliminate strain measurement error caused by temperature.
Further, a through hole, the fibre optical sensor and the temperature compensation sensor are offered on the bellows
After being laid in the bellows, the sensor lead being connected with the fibre optical sensor, temperature compensation sensor passes through
Institute's through hole passes the bellows.
Further, described pilot protection sleeve pipe is one section of center shim piece plastic tube, one end of the plastic tube with
The through hole that is opened up on the bellows is connected, the length of the plastic tube intercept with by the sensor lead from the through hole
Lead to outside beams of concrete and be defined.
Further, the sensor protection pad is the circular hollow pad of peripheral six groove, six spacing in pad periphery
Equal circle hole groove is harmonious with steel strand wires size, and centre is provided with circular opening, and Circularhole diameter is more than single steel strand diameter；Lay
When the fibre optical sensor is with the temperature compensation sensor, the sensor protection pad is inserted in steel strand wires, and is arranged at biography
Sensor two ends, the steel strand wires in same bellows to be separated at sensor laying, make to reserve sky enough between steel strand wires
Between, to protect the fibre optical sensor and the temperature compensation sensor from sensor caused by the phase mutual friction between steel strand wires
Damage.
Compared with prior art, the invention has the advantages that：Steel strand prestress loss monitoring device can
The direct monitoring lost to component inside steel strand prestress is realized, and tests fibre optical sensor durability degree height used and has
Certain bending property, can adapt to the laying needs of component inside sensor, realize to the long-term of steel strand prestress loss
Monitoring.
Brief description of the drawings
Fig. 1 is structure skiagraph of the invention.
Fig. 2 is structure transverse face figure of the invention.
Fig. 3 is single steel strand sensor layout diagram of the invention.
In figure：
1--- fibre optical sensors；2--- temperature compensation sensors；3--- bellowss；4--- pilot protection sleeve pipes；5--- sensors
Lead；6--- sensor protection pads；7--- light grating demodulation instrument；8--- steel strand wires.
Embodiment
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 being used to monitor steel strand prestress loss, as shown in figure 1, including Fibre Optical Sensor
Device 1, temperature compensation sensor 2, bellows 3, pilot protection sleeve pipe 4, sensor lead 5, sensor protection pad 6 and light
Grating demodulation instrument 7；The fibre optical sensor 1 is laid in the steel strand wires along the length direction of steel strand wires 8 in the bellows 3
At inflection point, the fibre optical sensor 1 passes through the sensor lead 5 and the light with the temperature compensation sensor 2
Grating demodulation instrument 7 is connected, and the light grating demodulation instrument 7 is obtained to obtain the wavelength information that sensor is collected in real time
To the real-time prestress change situation of steel strand wires.
In the present embodiment, described fibre optical sensor 1 includes the high-precision optical fiber sensor that all are used to survey strain, cloth
On the six roots of sensation steel strand wires of the bellows Internal and external cycle.
In the present embodiment, described temperature compensation sensor 2 is laid in structure temperature difference to be measured in the bellows
Region, to eliminate strain measurement error caused by temperature.
In the present embodiment, first bellows is divided into two in fibre optical sensor section, then offered on the bellows 3
One through hole, will be with the light after the fibre optical sensor 1 and the temperature compensation sensor 2 are laid in the bellows
The connected sensor lead 5 of fiber sensor, temperature compensation sensor passes the bellows by institute's through hole.
In the present embodiment, described pilot protection sleeve pipe 4 is one section of center shim piece plastic tube, the one of the plastic tube
End is connected with the through hole opened up on the bellows, and the length of the plastic tube intercepts to lead to the sensor lead from described
Lead to outside beams of concrete and be defined at hole.
In the present embodiment, the sensor protection pad 6 is the circular hollow pad of peripheral six groove, pad periphery six
The equal circle hole groove of spacing is harmonious with steel strand wires size, and centre is provided with circular opening, and Circularhole diameter is more than single steel strand diameter；
When laying the fibre optical sensor with the temperature compensation sensor, the sensor protection pad is inserted in steel strand wires, and sets
In sensor two ends, the steel strand wires in same bellows to be separated at sensor laying, make to stop in advance between steel strand wires
Enough spaces, to protect the fibre optical sensor and the temperature compensation sensor from being passed caused by the phase mutual friction between steel strand wires
Sensor is damaged.
The foregoing is only presently preferred embodiments of the present invention, all equivalent changes done according to scope of the present invention patent with
Modification, should all belong to the covering scope of the present invention.
Claims (6)
1. a kind of device for being used to monitor steel strand prestress loss, it is characterised in that：Passed including fibre optical sensor, temperature-compensating
Sensor, bellows, pilot protection sleeve pipe, sensor lead, sensor protection pad and light grating demodulation instrument；By the light
Fiber sensor is laid at the steel strand wires inflection point along the steel strand wires length direction in the bellows, the fibre optical sensor
It is connected with the temperature compensation sensor by the sensor lead with the light grating demodulation instrument, the light grating
(FBG) demodulator obtains the real-time prestress change situation of steel strand wires to obtain the wavelength information that sensor is collected in real time.
2. a kind of device for being used to monitor steel strand prestress loss 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 the bellows Internal and external cycle
On.
3. a kind of device for being used to monitor steel strand prestress loss according to claim 1, it is characterised in that：Described
Temperature compensation sensor is laid in structure temperature different zones to be measured in the bellows, is surveyed to eliminate to strain caused by temperature
Measure error.
4. a kind of device for being used to monitor steel strand prestress loss according to claim 1, it is characterised in that：The ripple
A through hole is offered on line pipe, after the fibre optical sensor is laid with the temperature compensation sensor in the bellows, with
The connected sensor lead of the fibre optical sensor, temperature compensation sensor passes the bellows by institute's through hole.
5. a kind of device for being used to monitor steel strand prestress loss according to claim 1, it is characterised in that：Described
Pilot protection sleeve pipe is one section of center shim piece plastic tube, one end of the plastic tube and the through hole phase opened up on the bellows
Even, the length interception of the plastic tube is defined so that the sensor lead is led to outside beams of concrete from the through hole.
6. a kind of device for being used to monitor steel strand prestress loss according to claim 1, it is characterised in that：It is described to pass
Sensor protection pad is the circular hollow pad of peripheral six groove, the equal circle hole groove of six spacing in pad periphery and steel strand wires size
It is harmonious, centre is provided with circular opening, Circularhole diameter is more than single steel strand diameter；Lay the fibre optical sensor and the temperature
When compensating sensor, the sensor protection pad is inserted in steel strand wires, and is arranged at sensor two ends, to by same ripple
Steel strand wires in pipe are separated at sensor laying, make to reserve sufficient space between steel strand wires, with protect the fibre optical sensor and
The temperature compensation sensor is from sensor degradation caused by the phase mutual friction between steel strand wires.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2016105624195 | 2016-07-18 | ||
| 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 |
|---|---|
| CN106969862A true CN106969862A (en) | 2017-07-21 |
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 Before (1)
| 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 |
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| Country | Link |
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| CN (2) | CN106153226A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109667264A (en) * | 2018-06-26 | 2019-04-23 | 湘潭大学 | A kind of installation guard method of fiber-optic grating sensor on overlength 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 |
Families Citing this family (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 |
| 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 |
| 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 |
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| 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 |
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- 2016-07-18 CN CN201610562419.5A patent/CN106153226A/en active Pending
- 2016-12-02 CN CN201611094471.9A patent/CN106969862A/en active Pending
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109667264A (en) * | 2018-06-26 | 2019-04-23 | 湘潭大学 | A kind of installation guard method of fiber-optic grating sensor on overlength 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106153226A (en) | 2016-11-23 |
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Application publication date: 20170721 |