CN110375791A - Bridge security monitoring method based on optical fiber sensing technology - Google Patents
Bridge security monitoring method based on optical fiber sensing technology Download PDFInfo
- Publication number
- CN110375791A CN110375791A CN201810328861.0A CN201810328861A CN110375791A CN 110375791 A CN110375791 A CN 110375791A CN 201810328861 A CN201810328861 A CN 201810328861A CN 110375791 A CN110375791 A CN 110375791A
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- Prior art keywords
- bridge
- optical fiber
- transferred
- information
- optical sensor
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
- G08B21/182—Level alarms, e.g. alarms responsive to variables exceeding a threshold
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
- G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
- G08B25/10—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using wireless transmission systems
Abstract
The invention discloses the bridge security monitoring methods based on optical fiber sensing technology, successively follow the steps below: detecting the strain information at each position of bridge by strain transducer and be transferred to fibre optical sensor analyzer；The gap information at each position of bridge is detected by optical fiber crack gauge and is transferred to fibre optical sensor analyzer；The every terms of information received is compared with the threshold value of setting by fibre optical sensor analyzer；Alarm command is issued when the every terms of information received is more than the threshold quantity of setting and is transferred to warning device issues alarm.The present invention solves the problems, such as there is limitation in practical applications by manual inspection in traditional Bridge Inspection of the existing technology, bridge security monitoring method based on optical fiber sensing technology is provided, real-time monitoring can be carried out to the parameters of bridge key position when it is applied, and the health condition of bridge is judged by analytical equipment according to monitoring data, to greatly enhance the survival ability of bridge.
Description
Technical field
The present invention relates to bridge security monitoring, and in particular to the bridge security monitoring method based on optical fiber sensing technology.
Background technique
Traditional Bridge Inspection is the information by manually visually inspecting or being obtained by means of portable instrument measurement
The safe condition of bridge structure is assessed.Artificial bridge inspection is divided into running check, inspects periodically and special examined.But
Artificial bridge inspection method has significant limitation in practical applications.The shortcoming of traditional detection mode is mainly manifested in:
It needs a large amount of human and material resources and has many inspection blind spots, this is especially prominent to modern large bridge；Subjectivity is strong, it is difficult to quantify；
Lack globality, manually check using solid memder as object, local detection and diagnosis information can only be provided, and cannot provide whole
The comprehensive structural health testing and evaluation information of body；Normal traffic circulation is influenced, relatively large bridge is usually required to take
If observation platform or observation vehicle, not can avoid and need to implement traffic control；Period is long, poor in timeliness, the inspection of large bridge
The period is looked into up to the several years, in the case where having major traffic accidents or serious natural calamity, cannot be provided to policymaker and the public
Instant messages.
From the above it can be seen that artificial bridge inspection program and facility, it can not detection that is direct and being effectively applied to large bridge
On, in order to provide one be directed to bridge structure health monitoring method, for monitor bridge during operation the safety of structure,
Durability and usability propose the present invention.
Summary of the invention
The present invention solves in traditional Bridge Inspection of the existing technology and relies on manual inspection in practical applications
There are problems that limitation, the bridge security monitoring method based on optical fiber sensing technology is provided, it can be to appearance when applying
Security risk can react in time, realize to the temperature of bridge key position, stress, vibration, gap variation etc. parameters into
Row real-time monitoring, and the health condition of bridge is judged according to monitoring data by analytical equipment, bridge maintenance work personnel can be real
When really recognize the safe condition of bridge, provide effective reference frame for the various activities on bridge, and then by mentioning
Guarantee the safety of bridge for required early stage danger warning and lesion assessment, to greatly enhance the survival ability of bridge.
The present invention is achieved through the following technical solutions:
Bridge security monitoring method based on optical fiber sensing technology, successively follows the steps below:
A: the strain information at each position of bridge is detected by strain transducer and is transferred to fibre optical sensor analyzer；
B: the gap information at each position of bridge is detected by optical fiber crack gauge and is transferred to fibre optical sensor analyzer；
C: the pressure information at each position of bridge is detected by pressure gauge and is transferred to fibre optical sensor analyzer；
D: the location information at detection each position of bridge is counted by GPS and is transferred to fibre optical sensor analyzer；
E: the temperature information at each position of bridge is detected by temperature sensor and is transferred to fibre optical sensor analyzer；
F: the every terms of information received is compared with the threshold value of setting by fibre optical sensor analyzer；
G: issuing alarm command when the every terms of information received is more than the threshold quantity of setting and is transferred to warning device hair
It alerts out.
Further, the bridge security monitoring method based on optical fiber sensing technology, the step G also carry out step H later:
Fibre optical sensor analyzer carries out information exchange by wireless transport module and server.
Further, the bridge security monitoring method based on optical fiber sensing technology, the wireless transport module are gsm wireless
Transmission module or cdma wireless transmission module or 4G wireless transport module.
Further, the bridge security monitoring method based on optical fiber sensing technology, the strain transducer packet in the step A
It includes from temperature compensation strain transducer and reusable strain transducer.
Further, the bridge security monitoring method based on optical fiber sensing technology, between the step E and step F also into
Row step I: the load-bearing information at each position of bridge is detected by dynamic on-ground weigher and is transferred to fibre optical sensor analyzer.
Compared with prior art, the present invention having the following advantages and benefits:
1, the present invention can react the security risk of appearance in time, realize to the temperature of bridge key position, stress, vibration
The parameters such as dynamic, gap variation carry out real-time monitoring, and judge the health condition of bridge by analytical equipment according to monitoring data,
Bridge maintenance work personnel can really recognize the safe condition of bridge in real time, provide effectively for the various activities on bridge
Reference frame, and then guarantee by early stage danger warning and lesion assessment required for providing the safety of bridge, thus greatly
The survival ability of big enhancing bridge.
2, the present invention replaces traditional electric transducer by fibre optical sensor, and compared with traditional electric transducer, optical fiber is passed
Sensor has the advantage that the sensor of multiple identical or different types can concatenate multiplexing on an optical fiber, the system integration
Degree is high；The sensor distance concatenated on simple optical fiber can be several centimetres or tens kilometers, be directly realized by remote transmission；Measurement essence
Degree and high resolution；The zero bias value of sensor is not drifted about, and absolute measurement is belonged to, and long-term work performance is stablized.The detection of sensing amount
And transmission is optical signal, is not influenced by electromagnetic interference and nuclear radiation；Good environmental adaptability can be used for high temperature, high humidity for a long time
And there are the adverse circumstances of chemical erosion etc.；It is light-weight, it is small in size, it is easy to install and use；With optical signal central wavelength value characterization
It is measured, is not influenced by light-intensity variation and transmission fiber bending loss etc.；Sensor, which concatenates chain, has self-healing function: normal work
When making, only need to the head end of sensing concatenation chain or tail end be connected to optical fiber grating sensing network analyzer and all the sensors can be realized
It is detected while signal；Once the fortuitous event or other disasters in construction cause sensor to concatenate chain breakdown, then can will pass
The other end of sense chain is also coupled to optical fiber grating sensing network analyzer, at this time using breakpoint as boundary, all sensors in the left and right sides
It is connected to optical fiber grating sensing network analyzer by the head end and tail end that concatenate chain respectively and is detected, realize self-healing.
3, the present invention is more to the malformation of key position, environment temperature distribution, level of ground water, structural vibration etc. on bridge
Parameter carries out the comprehensive monitor system of real-time monitoring, it can real-time monitoring bridge acted in factors such as various environment, loads
Under structural response, and can effectively provide the scientific basis of bridge maintenance management, significantly improve the whole management level of bridge,
It is pre- to diagnose bridge defect and extend bridge service life so as to ensure bridge security operation to the maximum extent.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below with reference to embodiment, the present invention is made
Further to be described in detail, exemplary embodiment of the invention and its explanation for explaining only the invention, are not intended as to this
The restriction of invention.
Embodiment
Bridge security monitoring method based on optical fiber sensing technology, successively follows the steps below:
A: the strain information at each position of bridge is detected by strain transducer and is transferred to fibre optical sensor analyzer；
B: the gap information at each position of bridge is detected by optical fiber crack gauge and is transferred to fibre optical sensor analyzer；
C: the pressure information at each position of bridge is detected by pressure gauge and is transferred to fibre optical sensor analyzer；
D: the location information at detection each position of bridge is counted by GPS and is transferred to fibre optical sensor analyzer；
E: the temperature information at each position of bridge is detected by temperature sensor and is transferred to fibre optical sensor analyzer；
F: the every terms of information received is compared with the threshold value of setting by fibre optical sensor analyzer；
G: issuing alarm command when the every terms of information received is more than the threshold quantity of setting and is transferred to warning device hair
It alerts out.
Wherein: step H is also carried out after the step G: fibre optical sensor analyzer passes through wireless transport module and service
Device carries out information exchange.The wireless transport module is that gsm wireless transmission module or cdma wireless transmission module or 4G are wirelessly passed
Defeated module.Strain transducer in the step A includes from temperature compensation strain transducer and reusable strain transducer.The step
Step I is also carried out between E and step F: the load-bearing information at each position of bridge being detected by dynamic on-ground weigher and is transferred to Fibre Optical Sensor
Device analyzer.Realization device of the invention includes optical fiber sensing analyzer and monitor terminal, and is connected with optical fiber sensing analyzer
Optical path splice tray, power module and the wireless transport module connect, the power module include DC power supply, solar panel and
Maintenance-free battery.DC power supply is used for system normal power supply；Solar panel is system power supply, phase for receiving solar energy
For common batteries and recyclable rechargeable battery, solar battery belongs to the green product of more energy efficient environmental protection；Work as direct current
When power supply trouble occurs in source, maintenance-free battery is system power supply, to avoid loss of data caused by shutting down.The wireless biography
Defeated module is gsm wireless transmission module or cdma wireless transmission module or 4G wireless transport module.Wireless transmission can break through away from
From obstacle, when transmission do not depend on actual track, the problem of so as to avoid maintenance line fault.The optical path splice tray setting
Several fibre-optical splices, the fibre-optical splice and described from temperature compensation strain transducer, reusable strain transducer, optical fiber joint measurement
Meter, pressure gauge, accelerometer, reinforcing rib meter, temperature sensor, dynamic on-ground weigher, anemobiagraph, GPS, embedment strain transducer and displacement
Meter is connected by communications optical cable.The cable heart and outer jacket that communications optical cable is made of several optical fiber are formed.Optical fiber and tradition
Symmetrical copper circuit and coaxial copper circuit compare, transmission capacity is much bigger；Attenuation is few；Transmission range is long；It is small in size；Weight
Gently；Without electromagnetic interference；It is at low cost.Dynamic on-ground weigher is used to monitor the weight of vehicular traffic on bridge, and anemobiagraph is for monitoring bridge
The air velocity of surrounding, GPS are used to monitor the static position and static displacement at each position of bridge.The monitoring device includes service
Device and the LED large-size screen monitors connecting with server, the optical fiber sensing analyzer are complete by wireless transport module and the server
At information exchange.Fiber grating is using optical fiber as basic material, and a kind of particular device formed by laser processing can satisfy
The light of Bragg condition is reflected, in practical projects, if the point to be detected is strained, temperature, pressure, displacement and add
The variation such as speed, wavelength will change, and can detect the stress situation of this point by the variation of Detection wavelength in this way, in turn
It may determine that the safe condition of detected bridge.It is described from temperature compensation strain transducer, reusable strain transducer, optical fiber joint measurement
Meter, accelerometer, reinforcing rib meter, temperature sensor, is embedded to the sensors such as strain transducer and displacement meter for the non-of measurement at pressure gauge
After electricity of the electricity conversion at easy measurement, by analog-to-digital conversion, digital quantity is transmitted directly to optical fiber sensing analyzer, optical fiber
Alarm command is issued when sensing analysis instrument by being more than the threshold quantity of setting to the digital quantity received, and digital quantity is passed through into nothing
Line transmission module is transferred to server, then is shown by LED large-size screen monitors.
Above-described specific embodiment has carried out further the purpose of the present invention, technical scheme and beneficial effects
It is described in detail, it should be understood that being not intended to limit the present invention the foregoing is merely a specific embodiment of the invention
Protection scope, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should all include
Within protection scope of the present invention.
Claims (5)
1. the bridge security monitoring method based on optical fiber sensing technology, which is characterized in that successively follow the steps below:
A: the strain information at each position of bridge is detected by strain transducer and is transferred to fibre optical sensor analyzer；
B: the gap information at each position of bridge is detected by optical fiber crack gauge and is transferred to fibre optical sensor analyzer；
C: the pressure information at each position of bridge is detected by pressure gauge and is transferred to fibre optical sensor analyzer；
D: the location information at detection each position of bridge is counted by GPS and is transferred to fibre optical sensor analyzer；
E: the temperature information at each position of bridge is detected by temperature sensor and is transferred to fibre optical sensor analyzer；
F: the every terms of information received is compared with the threshold value of setting by fibre optical sensor analyzer；
G:, which issuing alarm command when the every terms of information received is more than the threshold quantity of setting, and is transferred to warning device issues announcement
It is alert.
2. the bridge security monitoring method according to claim 1 based on optical fiber sensing technology, which is characterized in that the step
Step H is also carried out after rapid G: fibre optical sensor analyzer carries out information exchange by wireless transport module and server.
3. the bridge security monitoring method according to claim 2 based on optical fiber sensing technology, which is characterized in that the nothing
Line transmission module is gsm wireless transmission module or cdma wireless transmission module or 4G wireless transport module.
4. the bridge security monitoring method according to claim 1 based on optical fiber sensing technology, which is characterized in that the step
Strain transducer in rapid A includes from temperature compensation strain transducer and reusable strain transducer.
5. the bridge security monitoring method according to claim 1 based on optical fiber sensing technology, which is characterized in that the step
Step I, which is also carried out, between rapid E and step F: the load-bearing information at each position of bridge is detected by dynamic on-ground weigher and is transferred to optical fiber passing
Sensor analyzer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810328861.0A CN110375791A (en) | 2018-04-13 | 2018-04-13 | Bridge security monitoring method based on optical fiber sensing technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810328861.0A CN110375791A (en) | 2018-04-13 | 2018-04-13 | Bridge security monitoring method based on optical fiber sensing technology |
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| Publication Number | Publication Date |
|---|---|
| CN110375791A true CN110375791A (en) | 2019-10-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810328861.0A Withdrawn CN110375791A (en) | 2018-04-13 | 2018-04-13 | Bridge security monitoring method based on optical fiber sensing technology |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112197920A (en) * | 2020-08-27 | 2021-01-08 | 绍兴文理学院 | Bridge structure health monitoring system based on big data |
| CN112556634A (en) * | 2020-12-07 | 2021-03-26 | 贵州乌江清水河水电开发有限公司 | Joint meter monitoring system |
-
2018
- 2018-04-13 CN CN201810328861.0A patent/CN110375791A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112197920A (en) * | 2020-08-27 | 2021-01-08 | 绍兴文理学院 | Bridge structure health monitoring system based on big data |
| CN112556634A (en) * | 2020-12-07 | 2021-03-26 | 贵州乌江清水河水电开发有限公司 | Joint meter monitoring system |
| CN112556634B (en) * | 2020-12-07 | 2022-11-18 | 贵州乌江清水河水电开发有限公司 | Joint meter monitoring system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20191025 |
|
| WW01 | Invention patent application withdrawn after publication |