CN107621255A - A kind of flush type sedimentation monitoring system and monitoring method - Google Patents
A kind of flush type sedimentation monitoring system and monitoring method Download PDFInfo
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- CN107621255A CN107621255A CN201710949643.4A CN201710949643A CN107621255A CN 107621255 A CN107621255 A CN 107621255A CN 201710949643 A CN201710949643 A CN 201710949643A CN 107621255 A CN107621255 A CN 107621255A
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Abstract
The embodiments of the invention provide a kind of flush type sedimentation monitoring system and monitoring method, it is related to and belongs to technical field of electronic measurement, it is possible to achieve the real-time monitoring of distributed flush type sedimentation, classification of sedimentation warning function, and there is stable performance, the advantages of accuracy of detection is high.The monitoring system includes：Sensor, it is configured as measurement flush type horizontal direction and settles and produce the first signal；Signal transmission unit, electrically connected with the sensor, be configured as transmitting first signal；Signal demodulation unit, electrically connected with the signal transmission unit, be configured as demodulating first signal；Information process unit, electrically connected with the signal demodulation unit, be configured as the signal after demodulation being changed into settlement of foundation shift value.The monitoring system is distributed monitoring system.
Description
Technical field
The present invention relates to technical field of electronic measurement, more particularly to a kind of flush type sedimentation monitoring system and monitoring side
Method.
Background technology
Roadbed is an important component of line project (railway, highway, airfield runway etc.), especially high-speed railway
Higher requirement is proposed to the ride comfort of track, is subject to the basis of track structure weight and train load, it is also circuit
Most weak least stable component, the irregularity of roadbed physical dimension in engineering, the Geometric irregularity of track can be caused naturally, because
This needs basis to have higher stability and less permanent deformation, to ensure the high speed such as train, safety, even running.Due to
The characteristics of special engineering properties of weak soil and various carrier vehicle roadbeds, in general, the intensity of most section grounds with
The intractability of stability is all little, not as governing factor；To the main bugbear that engineering is brought it is sedimentation and deformation and its various
Solidification problem under the conditions for the treatment of measures, thus subgrade settlement problem on deformation be in the design of various circuits the master control to be considered because
Element.
The traditional monitoring method of subgrade settlement mainly has：Settle plate, single point settlement gage, Settlement Profiler pipe, settlement monitoring stake
Deng.The major defect of these monitoring methods is that installation is complicated, interference construction, influences construction quality, data acquisition is difficult, especially
Be point measurement, information content very little, it is difficult to grasp the change of whole piece subgrade settlement.Also some monitoring systems are in overall structure
It is more complicated, exist and be unfavorable for the various problems such as construction.
The content of the invention
The embodiments of the invention provide a kind of flush type sedimentation monitoring system and monitoring method, at least to solve existing skill
One or more problems present in art.
One aspect of the invention, there is provided a kind of flush type sedimentation monitoring system, the monitoring system include：
Sensor, it is configured as measurement foundation level direction and settles and produce the first signal；
Signal transmission unit, electrically connected with the sensor, be configured as transmitting first signal；
Signal demodulation unit, electrically connected with the signal transmission unit, be configured as demodulating first signal；
Information process unit, electrically connected with the signal demodulation unit, be configured as being changed into ground by the signal after demodulation
Base sedimentation deformation value.
The monitoring system is distributed monitoring system.
In monitoring system provided in an embodiment of the present invention, the monitoring system is arranged to distributed, distribution can be obtained
Formula is measured, for example a plurality of branch line is connected on a main line.Distributed monitoring system is obtainable to contain much information, and distributed
The distributed SS resolution ratio of monitoring system is small, and spacing can be less than 5mm between single adjacent sensors, and measurement accuracy is non-
Chang Gao, and will appreciate that the change of the settlement of foundation in larger area region.And the monitoring system compares in overall structure
It is relatively simple, in the absence of being unfavorable for the various problems such as construction.
In a kind of possible implementation, in above-mentioned monitoring system provided in an embodiment of the present invention, the sensor is
Multichannel optical fiber sensor, and the spacing between the sensor that is connected largely improves the accurate of measurement between 2mm-5mm
Property.
In a kind of possible implementation, in above-mentioned monitoring system provided in an embodiment of the present invention, the multichannel light
Fiber sensor also includes being used for experiencing that settlement of foundation produces that Brillouin scattering optical information changes grabs ground sensing optic cable and prevent
The buffer unit that optical cable is not pulled off
It is described to sense with grabbing in above-mentioned monitoring system provided in an embodiment of the present invention in a kind of possible implementation
Optical cable is provided with armouring, includes optical fiber inside the armouring.
In a kind of possible implementation, in above-mentioned monitoring system provided in an embodiment of the present invention, the buffer unit
In be provided with tediously long optical cable and the remaining long optical cable can freely stretch, optical cable can be avoided to be produced during stress and deformation and broken
Split.
In a kind of possible implementation, in above-mentioned monitoring system provided in an embodiment of the present invention, the multichannel light
Fiber sensor quantity is two or more, and the multichannel optical fiber sensor length is adapted with monitored area.
In a kind of possible implementation, in above-mentioned monitoring system provided in an embodiment of the present invention, described information processing
Unit is additionally provided with alarm, and ground sedimentation deformation value can be alarmed.
In a kind of possible implementation, in above-mentioned monitoring system provided in an embodiment of the present invention, the multichannel light
Fiber sensor includes the multichannel optical fiber sensor that at least one length is limited in 1m.
Based on same inventive concept, as another aspect of the present invention, the embodiment of the present invention is additionally provided for being embedded to
The monitoring method of formula settlement monitoring, the monitoring method are that ground is monitored by above-mentioned monitoring system.The monitoring side
Method can obtain distributed measurement, and information content is too big, will appreciate that the change of the settlement of foundation in larger area region, and measure
Method is easier.
In a kind of possible implementation, in above-mentioned monitoring method provided in an embodiment of the present invention, specifically include：It is described
Sensor measurement foundation level direction settles and produces the first signal；
First signal is transferred to the signal demodulation unit by the signal transmission unit；
First signal is demodulated into secondary signal and the secondary signal is transferred into institute by the signal demodulation unit
State information process unit；
The secondary signal is converted into settlement of foundation shift value by described information processing unit, and carries out classifying alarm.
In a kind of possible implementation, in above-mentioned monitoring method provided in an embodiment of the present invention, first signal
For Brillouin information signal, secondary signal is stress signal.
Brief description of the drawings
Fig. 1 is used for flush type settlement monitoring device planar structure schematic diagram to be provided in an embodiment of the present invention；
Fig. 2 grabs ground sensing optic cable structural representation to be provided in an embodiment of the present invention；
Fig. 3 is used for flush type settlement monitoring device operating diagram to be provided in an embodiment of the present invention；
Fig. 4 is flush type Monitoring method of the subsidence workflow schematic diagram provided in an embodiment of the present invention.
Embodiment
The embodiments of the invention provide a kind of flush type sedimentation monitoring system and monitoring method, at least to solve existing skill
Monitoring information amount present in art is very little, it is difficult to grasps the change of whole a wide range of flush type sedimentation, and monitoring system is in entirety
It is more complicated in structure, the one or more problems of grade for being unfavorable for construction be present.
Below in conjunction with the accompanying drawing 1 in the embodiment of the present invention to Fig. 4, the technical scheme in the embodiment of the present invention is carried out clear
Chu, it is fully described by, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.
The embodiments of the invention provide a kind of monitoring system and monitoring method of flush type settlement monitoring, referring to Fig. 1；It is described
Monitoring system includes：
Sensor 4, it is configured as measurement flush type horizontal direction and settles and produce the first signal；
Signal transmission unit 3, electrically connected with the sensor, be configured as transmitting first signal；
Signal demodulation unit 2, electrically connected with the signal transmission unit, be configured as demodulating first signal；
Information process unit 1, electrically connected with the signal demodulation unit, be configured as being changed into ground by the signal after demodulation
Base sedimentation deformation value.
The monitoring system is distributed monitoring system.Distribution refers to same or like sensor spatially in certain
Regular array, a plurality of branch line is in most cases presented and is connected on a main line, the model in larger area and space can be monitored
Enclose, measurement accuracy can also be adjusted according to the arrangement of sensor.
In monitoring system provided in an embodiment of the present invention, the monitoring system is arranged to distributed, distribution can be obtained
Formula measure, information content is too big, and the distributed SS resolution ratio of distributed monitoring system is small, single adjacent sensors it
Between spacing can be less than 5mm, measurement accuracy is very high, and will appreciate that the change of the flush type settling amount in larger area region
Change.And the monitoring system is fairly simple in overall structure, in the absence of be unfavorable for construction etc. various problems.
Further, in above-mentioned monitoring system, the sensor is fibre optical sensor 4, and the fibre optical sensor 4 is based on cloth
In deep scattering effect construction, the sedimentation and deformation distribution on measurement surface horizontal direction or vertical direction, and to dangerous section
Carry out real-time monitoring alarming；And the spacing between the sensor that is connected largely improves the standard of measurement between 2mm-5mm
True property.
Further, in above-mentioned monitoring system, the multichannel optical fiber sensor 4 also includes being used to experience settlement of foundation production
What raw Brillouin scattering optical information changed grabs ground sensing optic cable 5 and the buffer unit 6 for preventing optical cable not to be pulled off.It is described by
Power sensing optic cable 5, it is the optical signal sensing technology based on Brillouin light scattering effect, it can be quick to ambient temperature and strain
Sense.
Further, in above-mentioned monitoring system, the ground sensing optic cable 5 of grabbing is provided with armouring 7, and the inside of armouring 7 is wrapped
Contain optical fiber 8.
Further, in above-mentioned monitoring system, the armouring 7 is provided with the protrusion 71 of shape of threads.I.e. armouring 7 is screw thread
Armouring, screw thread armouring can both increase the lateral resistance of optical cable and soil, and can also increase the longitudinal resistance of optical cable and soil, should
Structure is beneficial to be in close contact with the soil of surrounding, it is ensured that settlement effectively passes to optical fiber 8.The horizontal stroke of the threaded bosses thing 71
Cutting profile can be with triangle or trapezoidal or circular arc etc..
Further, in above-mentioned monitoring system, tediously long optical cable and the remaining long optical cable energy are provided with the buffer unit 6
It is enough freely to stretch, optical cable can be avoided to produce fracture during stress and deformation.
Further, in above-mentioned monitoring system, the quantity of multichannel optical fiber sensor 4 is two or more, and described more
Channel fiber sensor length 4 is adapted with monitored area, in distribution, and can formulate sensor length according to field condition.
Further, in above-mentioned monitoring system, described information processing unit 1 is additionally provided with alarm, and ground can be sunk
Drop shift value is alarmed.Because distribution is set, alarm also into distribution, can the settling amount different to flush type divide
Level alarm.
Further, in above-mentioned monitoring system, the multichannel optical fiber sensor 4 is limited in 1m including at least one length
Multichannel optical fiber sensor, such as, first multichannel optical fiber sensor 4 (connection signal demodulation unit one end) length limitation
In 1m, lay monitored area for discrimination in logical calculated and happens is that local sedimentation and bulk settling.
Specifically, fibre optical sensor 4 is the sensing unit of distributed measurement foundation settlement deformation, can be according to field condition system
Determine sensor length；It is to experience settlement of foundation to grab ground sensing optic cable 5, and deformation of sedimentation is converted into the ess-strain of optical fiber,
And cause the close contact of optical cable and surrounding soil, it is ensured that sedimentation and deformation value effectively transmits；Buffer unit 6 to sense with grabbing
Optical cable 5 has Telescopic, optical cable can be protected not to be pulled off in certain range of stretch；Signal transmission unit 3 is will be more logical
The signal collection of the fibre optical sensor 4 in road is simultaneously delivered on signal demodulation unit 2；Signal demodulation unit 2 is by fibre optical sensor 4
Signal be demodulated as scattering optical information；Information process unit 1 be by optical information by analysis, be converted into displacement sedimentation become
Shape value, and classifying alarm is carried out to settling amount.
It is as described below to the principle of the present invention below in order to be better understood from the present invention.
The present invention is using optical fiber Brillouin sensing technology.In Brillouin scattering, the frequency of light is scattered relative to pump
Pu light has a frequency displacement, and the frequency displacement is commonly referred to as Brillouin shift.Scatter the size and fiber optic materials sound of light Brillouin shift amount
The characteristic of son has direct relation.When the fiber optic materials characteristic related to scattering light frequency is influenceed by temperature and strain, in cloth
Deep frequency displacement size will change.Therefore realized and divided by the frequency shift amount can for the backward Brillouin scattering light for determining pulsed light
Cloth temperature strain measures.
Brillouin scattering is showed by the generation of the stokes wave moved down relative to incident pump wave frequency rate in optical fiber,
Brillouin scattering can be regarded as the parameter interaction between pumping wave and stokes wave, sound wave.In cloth caused by scattering
Deep frequency shift amount is directly proportional to the velocity of sound in light：
fB=2nVA/λ (1)
In formula, VAFor the velocity of sound in optical fiber, λ is optical wavelength.
And the refractive index and the velocity of sound in optical fiber are all relevant with the factor such as the temperature of optical fiber and suffered stress, this makes in cloth
Deep frequency displacement fBChange with the change of parameter, temperature and fibre strain can all cause the linear movement of Brillouin's frequency, can represent
For：
Experiment finds that Power of Brillouin also changes with temperature and strain, and Power of Brillouin is linear with the rising of temperature
Increase, the linear decline with strain increase.Therefore Power of Brillouin is also referred to as：
Wherein, fB(0), P0Respectively T=0 DEG C, strain for 0 ε when Brillouin shift and power,Respectively
Temperature coefficient corresponding to Brillouin shift and the coefficient of strain,Respectively corresponding to Brillouin light power temperature coefficient and
The coefficient of strain.
It because strain facies is much smaller for influence of the temperature to Brillouin scattering luminous power, can typically ignore, and recognize
It is only relevant with temperature for Brillouin scattering luminous power.Therefore from 2,3 liang of formulas, by the luminous power for detecting Brillouin scattering
It is that can obtain the distributed intelligence of temperature along optical fiber, strain etc. with frequency.
The assessment system and optical fiber sensing technology of ess-strain-sedimentation and deformation effectively coordinate, i.e., the Brillouin in optical fiber dissipates
Information knots modification is penetrated, is directly changed into ess-strain value, sedimentation and deformation value is converted into by ess-strain value.
In order that the object, technical solutions and advantages of the present invention are clearer, below to reality provided in an embodiment of the present invention
When monitoring process and operation principle combination Fig. 1, Fig. 2 illustrate.
When sedimentation and deformation does not occur for ground, grab the ground stress of sensing optic cable 5 and show all in original state, information process unit
The settlement of foundation schematic diagram shown is the horizontal linear of 0 coordinate, and ground is in good condition.
If settlement of foundation occurs for sensor 1 and the section of sensor 2, the optical cable of the section is stretched, Brillouin scattering
Change, the section optical information is converted into the sedimentation and deformation value of the section length by information process unit 2, and is shown in such as figure
In sedimentation deformation schematic diagram shown in 3, continuous sedimentation is formed, other sections are normal.
The workflow of the system is shown in Fig. 4, and settlement of foundation causes to grab the ground stress of sensing optic cable 5, and buffer unit 6 discharges part
Length surplus optical cable, prevent that grabbing ground sensing optic cable 5 is pulled off, the stress of fibre optical sensor shows as Brillouin scattering optical information and changed
Become, dimming information solved by signal demodulation unit 2 in next step, optical information is converted into grabbing to the ess-strain size of ground sensing optic cable 5,
And the optical signal to being reflected back carries out sedimentation positioning；Data processing is carried out in next step and uploads to information process unit 1, finally
Sedimentation and deformation value is converted into, distributed sedimentation schematic diagram is formed, determines what is settled by Brillouin optical time domain analysis technology
Position, then whether transfinited come analysis and assessment settling amount according to sedimentation and deformation value, carry out classifying alarm.
Based on same inventive concept, as another aspect of the present invention, the embodiment of the present invention additionally provides flush type and sunk
Monitoring method is dropped, is illustrated in conjunction with accompanying drawing 1, Fig. 2, Fig. 3.
The flush type Monitoring method of the subsidence is that flush type is monitored by above-mentioned monitoring system.The monitoring method
Distributed measurement can be obtained, information content is too big, will appreciate that the change of the flush type settling amount in larger area region, and measure
Method is easier.
In a kind of possible implementation, in above-mentioned monitoring method provided in an embodiment of the present invention, specifically include：It is described
Sensor measurement flush type horizontal direction settles and produces the first signal；
First signal is transferred to the signal demodulation unit by the signal transmission unit 3；
First signal is demodulated into secondary signal and the secondary signal is transferred into institute by the signal demodulation unit 2
State information process unit 1；
The secondary signal is converted into settlement of foundation shift value by described information processing unit 1, and carries out classifying alarm.
In a kind of possible implementation, in above-mentioned monitoring method provided in an embodiment of the present invention, first signal
It is Brillouin information signal for wavelength movable signal, secondary signal is stress signal.
When settlement of foundation causes sedimentation device 6 to sink, sedimentation device 6 is closely connected with stress sensing optical cable 5, so as to drive
The under tension of stress sensing optical cable 5, buffer unit 6 discharge partial-length surplus optical cable, prevent stress sensing optical cable 5 to be pulled off,
The stress of multichannel optical fiber sensor 4 shows as light scattering and changed, and is demodulated by signal demodulation unit 2, and upload to information
Processing unit 1, optical information is converted into the ess-strain of stress sensing optical cable, is ultimately converted to settlement, formed distributed
Settle schematic diagram.The scattered light signal of fibre optical sensor 4 moved by generation wavelength carries out optical time domain positioning, according to settlement come
Analysis and assessment, carry out classifying alarm.
Alarm can be audible-visual annunciator, and can transmit SMS notification to staff.If settling amount does not transfinite
If, some other processing can be done.
Flush type sedimentation monitoring system provided in an embodiment of the present invention and monitoring method can at least realize it is following a kind of or
Multiple beneficial effect：
1. the real-time monitoring of distributed flush type sedimentation can be realized, relative to point type settlement sensor, its monitoring range is
Wire；
2. monitoring system stable performance provided in an embodiment of the present invention, accuracy of detection is high, not by electromagnetic interference；
3. the multichannel optical fiber sensor 4 in monitoring system provided in an embodiment of the present invention can realize series and parallel (wavelength-division
Multiplexing, time division multiplexing) flexible networking technology, expand monitoring range；
4. monitoring system provided in an embodiment of the present invention can realize sedimentation dynamic monitoring, sedimentation positioning and classification of sedimentation report
Alert function；
5. monitoring system provided in an embodiment of the present invention can realize that locally sedimentation and bulk settling are distinguished to monitored area
Not；
6. monitoring system provided in an embodiment of the present invention is simple, it is easy to construction, operation and maintenance；
7. monitoring system monitoring range provided in an embodiment of the present invention is big, cost is very low, it might even be possible to it is small to be generalized to life
Area and field etc..
Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention
God and scope.So, if these modifications and variations of the present invention belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising including these changes and modification.
Claims (10)
- A kind of 1. flush type sedimentation monitoring system, it is characterised in that including：Sensor, it is configured as measurement foundation level direction and settles and produce the first signal；Signal transmission unit, electrically connected with the sensor, be configured as transmitting first signal；Signal demodulation unit, electrically connected with the signal transmission unit, be configured as demodulating first signal；Information process unit, electrically connected with the signal demodulation unit, be configured as the signal after demodulation being changed into ground and sink Shift value drops.The monitoring system is distributed monitoring system.
- 2. monitoring system as claimed in claim 1, it is characterised in that the sensor is multichannel optical fiber sensor, and phase Even the spacing between sensor is between 2mm-5mm.
- 3. monitoring system as claimed in claim 2, it is characterised in that the multichannel optical fiber sensor also includes being used to experience Settlement of foundation produces the buffering dress grabbed ground sensing optic cable and prevent optical cable not to be pulled off that Brillouin scattering optical information changes Put.
- 4. monitoring device as claimed in claim 3, it is characterised in that the ground sensing optic cable of grabbing is provided with armouring, the armour Dress is internal to include optical fiber.
- 5. monitoring device as claimed in claim 4, it is characterised in that the armouring is provided with thread protrusion thing.
- 6. monitoring system as claimed in claim 3, it is characterised in that tediously long optical cable and described is provided with the buffer unit Remaining long optical cable can freely stretch.
- 7. monitoring system as claimed in claim 3, it is characterised in that the multichannel optical fiber number of sensors be two with On, and the multichannel optical fiber sensor length is adapted with monitored area.
- 8. monitoring system as claimed in claim 1, it is characterised in that described information processing unit is additionally provided with alarm, energy It is enough that ground sedimentation deformation value is alarmed.
- 9. a kind of flush type Monitoring method of the subsidence, it is characterised in that including being supervised with the monitoring system described in power 1 to ground Survey.
- 10. monitoring method as claimed in claim 8, it is characterised in that the monitoring system with described in power 1 is to settlement of foundation Be monitored including：The sensor measurement foundation level direction settles and produces the first signal；First signal is transferred to the signal demodulation unit by the signal transmission unit；First signal is demodulated into secondary signal and the secondary signal is transferred into the letter by the signal demodulation unit Cease processing unit；The secondary signal is converted into settlement of foundation shift value by described information processing unit, and carries out classifying alarm.
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| CN108613700A (en) * | 2018-05-31 | 2018-10-02 | 中国计量大学 | A kind of building inclination angle and Oscillation Amplitude detection device and method |
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| CN107702689A (en) * | 2017-10-11 | 2018-02-16 | 北京国华恒源科技开发有限公司 | The monitoring system and monitoring method of a kind of surface subsidence monitoring |
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| CN103604382A (en) * | 2013-11-01 | 2014-02-26 | 河海大学 | Bellows-distributed optical fiber measuring sensor |
| CN105547364A (en) * | 2015-12-23 | 2016-05-04 | 南京航空航天大学 | Splicing-type distributed optical fiber sensing system used for monitoring in internal portion of roadbed |
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