CN207395653U - A kind of strata displacement monitoring device - Google Patents
A kind of strata displacement monitoring device Download PDFInfo
- Publication number
- CN207395653U CN207395653U CN201721560738.9U CN201721560738U CN207395653U CN 207395653 U CN207395653 U CN 207395653U CN 201721560738 U CN201721560738 U CN 201721560738U CN 207395653 U CN207395653 U CN 207395653U
- Authority
- CN
- China
- Prior art keywords
- coaxial cable
- monitoring device
- rock stratum
- signal
- strata displacement
- 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.)
- Active
Links
- 238000006073 displacement reaction Methods 0.000 title claims abstract description 44
- 238000012806 monitoring device Methods 0.000 title claims abstract description 35
- 239000011435 rock Substances 0.000 claims abstract description 30
- 238000005553 drilling Methods 0.000 claims abstract description 19
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 9
- 239000010959 steel Substances 0.000 claims abstract description 9
- 239000004020 conductor Substances 0.000 claims description 14
- 238000004146 energy storage Methods 0.000 claims description 6
- 238000009826 distribution Methods 0.000 claims description 2
- 230000000737 periodic effect Effects 0.000 claims description 2
- 238000012544 monitoring process Methods 0.000 abstract description 16
- 238000005259 measurement Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 3
- 230000000644 propagated effect Effects 0.000 abstract description 3
- 230000005540 biological transmission Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 210000003484 anatomy Anatomy 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000007569 slipcasting Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The utility model discloses a kind of strata displacement monitoring devices, are related to Geotechnical Engineering field.The strata displacement monitoring device includes coaxial cable bragg grid strain transducer, signal (FBG) demodulator, radio receiving transmitting module, solar powered module and retaining wall steel pipe, when coaxial cable bragg grid strain transducer is when rock stratum generates and generates elongation strain when displacement is subject to external force to act on, so that the reflection peak frequency for the electromagnetic wave propagated in coaxial cable generates offset, reflected signal is sent to signal (FBG) demodulator and is demodulated, rock stratum is sent to monitoring center by force information by radio receiving transmitting module, the stressing conditions of real-time monitoring objective rock stratum, early warning is carried out to strata displacement.A kind of strata displacement monitoring device disclosed in the utility model, firm in structure, wide range of measurement can work in extreme environment, avoid generation rock stratum is straggly from causing drilling well plug dead and the electric gate signal in coaxial cable is caused to interrupt, monitoring effect is more preferable.
Description
Technical field
The utility model is related to Geotechnical Engineering fields, and in particular to one kind is strained based on coaxial cable bragg grid
The strata displacement monitoring device of sensor.
Background technology
At present, since rock stratum compression and land subsidence caused by a large amount of exploitations and the construction of underground engineering of subterranean resource show
As commonplace, huge economic loss is caused to society, prevents and reduces natural disasters and has become compeling for China's economy and society development
It is essential and asks.And rock stratum internal modification, displacement situation are accurately grasped, establishing strata displacement Long-term Monitoring Systems is prevention and administers ground
The key of face sedimentation.
Currently, fiber-optic grating sensor is mainly used for the monitoring device of strata displacement, it is mainly by means of SiO2
The low-loss of the signal transmission of single mode optical fiber and specific optical characteristics are monitored work.But fiber-optic grating sensor
The fragility of making material in itself causes its measurement dynamic range small, fragile, and can not expire under extreme conditions and environment
The requirement of strain measurement when full.
Therefore, in view of problem above, it is necessary to propose a kind of sound construction, wide range of measurement, adaptable rock stratum position
Monitoring device is moved, to meet the needs of research measurement.
Utility model content
In view of this, the utility model proposes a kind of strata displacement monitoring device, the monitoring device uses coaxial cable
Bragg grid strain transducer, firm in structure, monitoring dynamic range is wide, can work in extreme environment and be monitored in real time,
Disaster accident can be effectively born, ensures that monitoring device works normally under severe conditions.
A kind of strata displacement monitoring device that purpose according to the present utility model proposes, including：
Coaxial cable bragg grid strain transducer：For gather rock stratum by force information and generate electric gate signal；
Signal (FBG) demodulator：It is electrically connected with the coaxial cable bragg grid strain transducer, for receiving electric gate signal
And the electric gate signal is demodulated, to obtain the displacement strain information of the rock stratum；
Radio receiving transmitting module：It is electrically connected with the signal (FBG) demodulator, for modulating signals into the position for the rock stratum that instrument demodulates
It moves strain information and is transmitted to monitoring center, so that monitoring center carries out early warning according to the displacement strain information of rock stratum.
Preferably, the coaxial cable bragg grid strain transducer is made of an at least coaxial cable, Mei Yisuo
Stating coaxial cable includes inner conductor layer, outer conductor layer and dielectric layer, and the medium is placed in inner conductor layer and outer conductor layer
Between, drilling, the drilling connection inner conductor layer and outer conductor layer are formed inside the coaxial cable, it is described to drill along coaxial electrical
Cable axially carries out periodic distribution, forms electric grid impedance discontinuous structure.
Preferably, the radio receiving transmitting module is low-power consumption Zigbee module, and the Zigbee module includes microcontroller
And radio-frequency module.
Preferably, the monitoring device further includes one for providing the solar powered module of electric power, and the solar energy supplies
Electric module is electrically connected with signal (FBG) demodulator, and the solar powered module includes solar collecting device and electrical energy storage device.
Preferably, the electrical energy storage device is accumulator.
Preferably, the monitoring device further includes a retaining wall for fixing coaxial cable bragg grid strain transducer
Steel pipe, the retaining wall pipe diameter are 100mm, pipe thickness 3.5mm.
Compared with prior art, it is the advantages of a kind of strata displacement monitoring device disclosed in the utility model：
(1) the coaxial cable bragg grid strain transducer that the utility model uses has good flexibility, structure
Firm, monitoring dynamic range is wide, can work in extreme environment and be monitored in real time, can effectively bear disaster accident, ensure
Monitoring device works normally under severe conditions.
(2) the utility model can realize that delamination-terrane monitors, and the variation of each rock stratum can be monitored.
(3) the utility model can work in extreme environment, avoid occur rock stratum it is straggly cause drilling well plug extremely so as to cause
Coaxial cable in electric gate signal interrupt, improve monitoring effect.
(4) the utility model uses solar power supply apparatus, can realize the self energizing of monitoring device, ensures monitoring device
It works normally in the field environment.
Description of the drawings
For the clearer technical solution for illustrating the utility model embodiment or the prior art, below will to embodiment or
Attached drawing needed to be used in the description of the prior art does simple introduction, it is clear that, the accompanying drawings in the following description is only
Some embodiments of the utility model, it will be clear to the skilled person that before not making the creative labor
It puts, can also obtain other accompanying drawings according to these attached drawings.
Fig. 1 is a kind of structure diagram of strata displacement monitoring device disclosed in the utility model.
Fig. 2 is coaxial cable bragg grid strain transducer structure diagram.
Digital or alphabetical representative parts title in figure is：
1st, solar powered module；2nd, radio receiving transmitting module；3rd, signal (FBG) demodulator；4th, coaxial cable bragg grid strains
Sensor；5th, retaining wall steel pipe；6th, dielectric layer；7th, inner wire；8th, drill；9th, outer conductor.
Specific embodiment
Specific embodiment of the present utility model is described briefly below in conjunction with the accompanying drawings.Obviously, described embodiment
The only part of the embodiment rather than whole embodiments of the utility model, based on the embodiment in the utility model, ability
Domain those of ordinary skill all other embodiments obtained on the premise of creative work is not made, belong to this practicality
Novel protected scope.
Figures 1 and 2 show that a kind of preferred embodiment of strata displacement monitoring device disclosed in the utility model, respectively from
Different angles has carried out structure detailed anatomy.
A kind of strata displacement monitoring device as shown in Figs. 1-2, including：
Coaxial cable bragg grid strain transducer 4：For gather rock stratum by force information and generate electric gate signal.
Signal (FBG) demodulator 3：It is electrically connected with coaxial cable bragg grid strain transducer 4, for receiving electric gate signal simultaneously
Electric gate signal is demodulated, to obtain the displacement strain information of rock stratum.
Radio receiving transmitting module 2：It is electrically connected with signal (FBG) demodulator 3, for modulating signals into the displacement for the rock stratum that instrument 3 demodulates
Strain information is transmitted to monitoring center, so that monitoring center carries out early warning according to the displacement strain information of rock stratum.
4 one end of coaxial cable bragg grid strain transducer is embedded in rock stratum, and the other end is electrically connected with signal (FBG) demodulator 3
It connects, signal (FBG) demodulator 3 is electrically connected the output signal access radio receiving transmitting module 2 of i.e. signal (FBG) demodulator 3 with radio receiving transmitting module 2
Input port.When 4 surrounding rock stratum of coaxial cable bragg grid strain transducer is subjected to displacement variation, coaxial cable Prague
For electric grid strain transducer 4 because stress generates elongation strain, electric gate length, which changes, causes reflection of electromagnetic wave peak frequency to occur
Offset, electric gate signal change, and signal (FBG) demodulator 3 receives the electric grid letter in coaxial cable bragg grid strain transducer 4
Number, and be demodulated to obtain strata displacement information, strata displacement information is then transmitted to radio receiving transmitting module 2, by wirelessly receiving
Microcontroller in hair module 2 wakes up radio-frequency module and is transmitted to monitoring center, and early warning is monitored to strata displacement.
Rock stratum stress information is obtained using coaxial cable bragg grid strain transducer 4, firm in structure, monitoring
Dynamic range is wide, can work in extreme environment and be monitored in real time, can effectively bear disaster accident, ensures that monitoring device exists
It is worked normally under conditions of severe.
Further, coaxial cable bragg grid strain transducer 4 is made of an at least coaxial cable, each coaxial
Cable includes 7 layers of inner wire, 9 layers of outer conductor and dielectric layer 6, and dielectric layer 6 is placed in 7 layers of inner wire and 9 layers of centre of outer conductor, together
Drilling 8 is formed inside shaft cable, 87 layers of connection inner wire of drilling and 9 layers of outer conductor, drilling 8 axially carry out week along coaxial cable
Phase property is distributed, and forms electric grid impedance discontinuous structure.Coaxial cable bragg grid sensor 4 is to drill 8 on coax
It makes, the coaxial cable section being placed in monitoring rock stratum has drilling 8, that is, the strain of coaxial cable bragg grid passes
Sensor 4, and the coaxial cable in other parts is propagated for electromagnetic wave signal, if drilling 8 makes electric grid and is not limited.
The coaxial cable bragg grid strain transducer 4 is on coax along the cable axial direction progress equidistant cycle
Property drilling, uniform impedance discontinuities are formed on coax, so as to which bragg grid be made.The spy of coaxial cable transmission line
Sign impedance can be expressed as：
Wherein：μ is magnetic conductivity, and ε is dielectric constant, and α is the inner wire diameter of coaxial cable transmission line, and b is coaxial cable
The outer conductor diameter of transmission line.
The dielectric material at 5 that drills becomes air so as to change the dielectric constant of the dielectric layer of the point so that the point hinders
Anti- change and the characteristic impedance of coaxial cable script do not match that the characteristic impedance of transmission line can be regarded as from Z0Become ZLSo as to
It generates the electromagnetic wave propagated in coaxial cable to reflect, the voltage reflection coefficient at the impedance discontinuity can be expressed as：
For coaxial cable electricity grid structure, it is assumed that the impedance discontinuity variation on coaxial wire has uniformity, then often
Reflected voltage caused by a impedance discontinuity point is same phase, and the reflected voltage signal superposition with phase just generates coaxial cable
Electric gate signal.
Further, radio receiving transmitting module 2 be low-power consumption Zigbee module, wherein Zigbee module include microcontroller and
Radio-frequency module.
Further, which further includes one for providing the solar powered module 1 of electric power, this is solar powered
Module 1 is electrically connected with signal (FBG) demodulator 3, and including solar collecting device and electrical energy storage device, wherein electrical energy storage device is
Accumulator.Entire monitoring device is powered using solar powered module 1, solar energy is collected by solar cell, and
It converts solar energy into electrical energy to be stored in accumulator and be used for whole device, realize the self energizing of monitoring device, ensure monitoring
The all weather operations of device.
Further, which further includes one for fixing coaxial cable bragg grid strain sensing
The retaining wall steel pipe 5 of device 4,5 internal diameter of retaining wall steel pipe are 100mm, pipe thickness 3.5mm.
A kind of strata displacement monitoring device disclosed in the utility model, with coaxial cable bragg grid strain transducer
Rock stratum stress information gathering is carried out, monitoring result is accurate, and firm in structure, applied widely, is properly applied to extreme environment.
The strata displacement monitoring device of corresponding above-described embodiment, the utility model also propose a kind of strata displacement monitoring side
Method, this method are realized using the device of above-described embodiment.The monitoring method comprises the following steps：
Step 1：According to the geological structure in monitoring region, monitoring point is selected with reference to Rock soil Characteristics.
Step 2：Drilling well is carried out at monitoring point, drilling depth is depending on actual conditions.
Step 3：It from drilling well tripping in retaining wall steel pipe 5, is repeated after whole well and rushes well and retaining wall work, remove deposition in well
Object, and ensure the complete of the borehole wall.
Step 4：Coaxial cable bragg grid strain transducer 4 is transferred into drilling well, is avoided in decentralization process coaxial
It is mutually wound between cable.
Step 5：After decentralization, slip casting solidification, fixing coaxial cable are carried out to coaxial cable upper and lower ends.
Step 6：By 3 input port of the coaxial cable to basset access signal (FBG) demodulator, coaxial cable bassets portion
The length divided is 350mm.
Step 7：Signal (FBG) demodulator 3 receives the electric gate signal in coaxial cable bragg grid strain transducer 4, goes forward side by side
Row demodulation obtains strata displacement information, is then transmitted to monitoring center by radio receiving transmitting module 2, strata displacement is monitored
Early warning.
When 4 surrounding rock stratum of coaxial cable bragg grid strain transducer is subjected to displacement variation, coaxial cable Prague
For electric grid strain transducer 4 because stress generates elongation strain, electric gate length, which changes, causes reflection of electromagnetic wave peak frequency to occur
Offset, electric gate signal change, and signal (FBG) demodulator 3 receives the electric grid letter in coaxial cable bragg grid strain transducer 4
Number, and be demodulated to obtain strata displacement information, monitoring center is then transmitted to by radio receiving transmitting module 2, to strata displacement
It is monitored early warning.
Further, the Noncoring drill bit that drill bit used in drilling well is diameter 124mm in step 2.
Further, 5 a diameter of 100mm of retaining wall steel pipe, pipe thickness 3.5mm in step 3.
Further, grouting cement cement mortar ratio is cement in step 5:Water:Husky=1:0.65:1.
In conclusion the coaxial cable bragg grid strain transducer that the utility model uses is firm in structure, model is measured
It encloses extensively, can work in extreme environment and be monitored in real time.The utility model can realize that delamination-terrane monitors, and to each
The variation of rock stratum can monitor.A kind of strata displacement monitoring device can work in extreme environment disclosed in the utility model, keep away
Exempt from occur rock stratum it is straggly cause drilling well plug extremely so as to cause in coaxial cable electric gate signal interrupt, improve monitoring effect.
The foregoing description of the disclosed embodiments enables professional and technical personnel in the field to realize and new using this practicality
Type.A variety of modification modes of these embodiments will be apparent for those skilled in the art, herein
Defined General Principle can be real in other embodiments in the case where not departing from the spirit and scope of the utility model
It is existing.Therefore, the utility model is not intended to be limited to the embodiments shown herein, and is to fit to original disclosed herein
The reason most wide scope consistent with features of novelty.
Claims (6)
1. a kind of strata displacement monitoring device, which is characterized in that including：
Coaxial cable bragg grid strain transducer (4)：For gather rock stratum by force information and generate electric gate signal；
Signal (FBG) demodulator (3)：It is electrically connected with the coaxial cable bragg grid strain transducer (4), for receiving electric grid letter
Number and the electric gate signal is demodulated, to obtain the displacement strain information of the rock stratum；
Radio receiving transmitting module (2)：It is electrically connected with the signal (FBG) demodulator (3), for modulating signals into the rock stratum that instrument (3) demodulates
Displacement strain information be transmitted to monitoring center, so as to monitoring center according to the displacement strain information of rock stratum carry out early warning.
2. strata displacement monitoring device according to claim 1, which is characterized in that the coaxial cable bragg grid should
Become sensor (4) to be made of an at least coaxial cable, each coaxial cable includes inner wire (7) layer, outer conductor (9) layer
And dielectric layer (6), the dielectric layer (6) is placed among inner wire (7) layer and outer conductor (9) layer, inside the coaxial cable
Form drilling (8), described drilling (8) connection inner wire (7) layer and outer conductor (9) layer, the drilling (8) is along coaxial cable axis
To periodic distribution is carried out, electric grid impedance discontinuous structure is formed.
3. strata displacement monitoring device according to claim 2, which is characterized in that the radio receiving transmitting module (2) is low
Power consumption Zigbee module, the Zigbee module include microcontroller and radio-frequency module.
4. strata displacement monitoring device according to claim 1, which is characterized in that the monitoring device further includes one and is used for
The solar powered module (1) of electric power is provided, the solar powered module (1) is electrically connected with signal (FBG) demodulator (3), it is described too
Positive energy power supply module (1) includes solar collecting device and electrical energy storage device.
5. strata displacement monitoring device according to claim 4, which is characterized in that the electrical energy storage device is electric power storage
Pond.
6. strata displacement monitoring device according to claim 1, which is characterized in that the monitoring device further includes one and is used for
The retaining wall steel pipe (5) of fixing coaxial cable bragg grid strain transducer (4), retaining wall steel pipe (5) internal diameter are 100mm,
Pipe thickness is 3.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721560738.9U CN207395653U (en) | 2017-11-21 | 2017-11-21 | A kind of strata displacement monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721560738.9U CN207395653U (en) | 2017-11-21 | 2017-11-21 | A kind of strata displacement monitoring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207395653U true CN207395653U (en) | 2018-05-22 |
Family
ID=62324022
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721560738.9U Active CN207395653U (en) | 2017-11-21 | 2017-11-21 | A kind of strata displacement monitoring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207395653U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108007333A (en) * | 2017-11-21 | 2018-05-08 | 中国矿业大学 | A kind of strata displacement monitoring device and monitoring method |
| CN110017760A (en) * | 2019-04-15 | 2019-07-16 | 同济大学 | Passive and wireless displacement sensor and displacement sensing system based on helical antenna |
-
2017
- 2017-11-21 CN CN201721560738.9U patent/CN207395653U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108007333A (en) * | 2017-11-21 | 2018-05-08 | 中国矿业大学 | A kind of strata displacement monitoring device and monitoring method |
| CN110017760A (en) * | 2019-04-15 | 2019-07-16 | 同济大学 | Passive and wireless displacement sensor and displacement sensing system based on helical antenna |
| CN110017760B (en) * | 2019-04-15 | 2024-05-10 | 同济大学 | Passive wireless displacement sensor and displacement sensing system based on spiral antenna |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102168950B (en) | Method of using distributed optical fibers for advanced monitoring of tunnel surrounding rock deformation | |
| CN201232545Y (en) | Downhole wireless electromagnetical signal radiation apparatus while drilling | |
| CN102221332A (en) | Fiber grating multi-point sensing device for unconsolidated strata as well as monitoring system and method | |
| WO2019056410A1 (en) | Structure for monitoring stability of existing roadbed and slope, and construction method therefor | |
| CN202139617U (en) | System for monitoring power transmission line pole tower foundation settlement based on single-point displacement | |
| CN101761062A (en) | Wireless rotating penetrometer | |
| CN207395653U (en) | A kind of strata displacement monitoring device | |
| CN202454043U (en) | Monitoring device of ground collapse disaster | |
| CN206573157U (en) | Landslide monitoring device and system | |
| CN204457878U (en) | Without cable, the landslide disaster monitor and early warning system that can work alone for a long time | |
| CN112504336A (en) | Landslide area pipeline deformation monitoring system | |
| CN212003162U (en) | Electromagnetic wave logging-while-drilling parameter monitoring device | |
| CN108007333A (en) | A kind of strata displacement monitoring device and monitoring method | |
| CN102692640A (en) | Optical fiber deep well earthquake sound instrument | |
| WO2020143187A1 (en) | Far-field acoustic sensing and imaging and evaluation system for surveying offshore wind turbine tower foundation | |
| CN203310382U (en) | Concrete freeze-thaw expansion strain monitoring fiber sensor | |
| CN207528356U (en) | A kind of multichannel temperature monitoring device for underground heat shallow well | |
| CN110397047A (en) | Side slope protection stake and its slope monitoring and guard system | |
| CN108716906A (en) | A kind of fixed intelligent inclinometer, system and implementation | |
| CN208505293U (en) | A kind of fixed intelligent inclinometer and system | |
| CN213748552U (en) | Landslide area pipeline deformation monitoring system | |
| CN106436675B (en) | A kind of monitoring method of frozen ground regions foundation pit side-wall water-heat process | |
| CN213240507U (en) | Self-adaptive monitoring device for large displacement in deep part of landslide | |
| CN210442518U (en) | Improved PVC pipe suitable for measuring geological potential information | |
| CN211200411U (en) | Side slope protection pile and side slope monitoring and protection system thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |