CN104501732B - A kind of hydro-structure distortion distributed optical fiber sensing device and method - Google Patents
A kind of hydro-structure distortion distributed optical fiber sensing device and method Download PDFInfo
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- CN104501732B CN104501732B CN201410784038.2A CN201410784038A CN104501732B CN 104501732 B CN104501732 B CN 104501732B CN 201410784038 A CN201410784038 A CN 201410784038A CN 104501732 B CN104501732 B CN 104501732B
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Abstract
The invention discloses a kind of hydro-structure distortion distributed optical fiber sensing device and method, comprise vertical shaft of the logical end, be provided with displacement platform in vertical shaft of the described logical end, the both sides on displacement platform are provided with drill bit drive unit, and drill bit drive unit is connected with taper bit; Drill bit drive unit is connected with halliard respectively, and lift cord wrapping is on take-up reel; Be connected with one end of a pair spring in the middle part of displacement platform, the other end of spring is with vertically to survey chi hinged, vertical survey chi is through scale platform, be provided with optical fiber between two springs and hang bucket, optical fiber is hung in bucket and is provided with wavy loopback fiber, wavy loopback fiber is provided with optical fiber button, and the input end of wavy loopback fiber is provided with light wave transmitter, and the output terminal of wavy loopback fiber is provided with light wave collector.The present invention has repeatably use, very easily installation and the feature such as the advantage such as real-time detection and maintenance and distributed, micro-macroscopic view, real-time, complex environment high-adaptability.
Description
Technical field
The present invention relates to the monitoring method of a kind of hydro-structure distortion distributed optical fiber sensing device, belong to building field.
Background technology
Wear the hydraulic structures such as dike, sluice to be in operation and often to occur the diseases such as non-uniform settling, adverse effect is caused to the safety of buildings and normal use, even causes building destruction or accident.By laying monitoring instrument or device, Real-time Obtaining region deformation information, reasonable analysis region deformation space and Time Change, Timeliness coverage region deformation (particularly nonaffine deformation) unusual condition, take to take precautions against or control measure with science, be on active service safely significant to guarantee hydraulic structures.
At present, conventional hydro-structure deformation monitoring device many existence construction lay difficulty, can recycling rate of waterused low, not easily repair and maintenance, poor durability, precision low, be subject to the deficiencies such as electromagnetic environment interference.Fibre Optical Sensor has radioresistance, the feature such as corrosion-resistant, and being applied to nonaffine deformation disease monitoring has obvious advantage; But from the present situation of fibre strain monitoring, distributed Real-Time Monitoring mode is current research and application focus, but technology itself is still immature with engineering practicability aspect, utilize the change of Rayleigh scattering and Fresnel reflection in optical fiber, Brillouin scattering, not only can accurately locate nonaffine deformation disease in theory, and the quantitative description of nonaffine deformation disease can be provided; But in the implementation procedure of above-mentioned target, the laying of optical fiber is extremely fastidious, especially loop arranges difficulty especially.From up-to-date technical field of optical fiber, ODiSI (the Optical Distributed Sensor Interrogator) distributed optical fiber sensing system of LunaTechnology company of the U.S. can realize mm level spatial resolution, but maximum sensing length only has 50m, and in practical application, being subject to multifactor interference, it effectively monitors length and resolution can reduce; NBX company of the Japan light that utilizes PPP-BOTDA technology to produce receives instrument, and effective spatial resolution can bring up to cm level, but needs optical fiber circuit to lay, and the nonaffine deformation causing it to be difficult to directly apply to Practical Project is monitored.Spatial resolution when ensureing existing distribution type fiber-optic maximum monitoring distance (within the scope of 25km), can be brought up to mm level by the technology of the present invention.
In order to make full use of the nonaffine deformation of prior art monitoring hydro-structure, monitoring equipment is made to obtain higher initial precision, larger measurement range, traditional monitoring technology combines with optical fiber sensing technology by the present invention, use for reference traditional monitoring technology directly perceived, simple advantage, avoid it and lay difficulty, utilization factor is low, cannot repair and maintenance, by unfavorable drawbacks such as electromagnetic environment interference, in conjunction with current optical fiber sensing technology have distributed, high precision, real-time, the advantage of many complex environment application, structure can carry the application platform of two kinds of technology altogether, the element of installation of the shared information fusion of two kinds of technology is set, realize effective monitoring and the application of hydro-structure nonaffine deformation mm class precision.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the invention provides the monitoring method of a kind of hydro-structure distortion distributed optical fiber sensing device, creatively build the integrated platform that can merge new and old technology, there is repeatably use, very easily installation and the feature such as the advantage such as real-time detection and maintenance and distributed, micro-macroscopic view, real-time, complex environment high-adaptability.
Technical scheme: for solving the problems of the technologies described above, a kind of hydro-structure distortion distributed optical fiber sensing device of the present invention, comprises vertical shaft of the logical end, is provided with displacement platform in vertical shaft of the described logical end, displacement platform is monosymmetricly provided with drill bit drive unit, and drill bit drive unit is connected with taper bit; The drill bit drive unit of displacement platform both sides is connected with halliard respectively, and lift cord wrapping is on take-up reel, and take-up reel is arranged on gear shaft, and the gear on gear shaft engages with transmitting gear, and transmitting gear is driven by motor; In the middle part of displacement platform, one end of the spring installed symmetrical with a pair is connected, the other end of spring is with vertically to survey chi hinged, vertical survey chi is through scale platform, scale platform is positioned at the crossbeam be arranged on vertical shaft of the logical end, be provided with optical fiber between two springs and hang bucket, the bottom that bucket hung by optical fiber is connected with displacement platform, optical fiber is hung in bucket and is provided with wavy loopback fiber, wavy loopback fiber is provided with optical fiber button, the input end of wavy loopback fiber is provided with light wave transmitter, and the output terminal of wavy loopback fiber is provided with light wave collector.
As preferably, described halliard is provided with scale.
As preferably, the upper surface of vertical shaft, the described logical end is provided with level meter.
As preferably, the below of described displacement platform is provided with river bottom protection boss.
As preferably, below described displacement platform, be provided with Compress Spring.
A monitoring method for hydro-structure distortion distributed optical fiber sensing device, comprises the following steps:
1st step, under zero load, halliard is totally released, displacement platform and the parts that carry thereof are relax to the lowermost end of vertical shaft of the logical end, allow river bottom protection boss touch the bottom surface of vertical shaft of the logical end, test drawing-pressing spring and the vertical duty surveying chi, wavy loopback fiber work condition is monitored with light wave transmitter, light wave collector, after treating that above-mentioned operation completes, in no abnormal situation, each parts are returned to original initial position;
2nd step, in native stone calmodulin binding domain CaM, the groove of excavation and vertical shaft shape similar of the logical end, by the balance between level meter adjustment vertical shaft of the logical end and native stone calmodulin binding domain CaM, halliard is driven to transfer taper bit by motor, displacement platform and river bottom protection boss, after dropping to assigned address, by checking the scale on halliard, make the length conjugating platform both sides halliard equally long, make displacement platform, taper bit is in horizontal equilibrium position, by hinged for the vertical survey chi on prior mounted drawing-pressing spring and scale platform, the wavy loopback fiber being installed to optical fiber extension bucket is drawn out to light wave transmitter and light wave collector place,
3rd step, promotes taper bit by drill bit drive unit and passes from vertical shaft of the logical end, in the native stone calmodulin binding domain CaM that taper bit deepens continuously around vertical shaft of the logical end the most at last;
4th step, when the drawing-pressing spring of side is subject to the sedimentation load of the respective side transmitted from this side taper bit, it is d that respective side vertically surveys this side sedimentation and deformation value that chi monitors
1, meanwhile, when opposite side drawing-pressing spring is subject to the sedimentation load from the corresponding side of transmitting to its respective side taper bit, corresponding vertical survey chi monitor this side sedimentation and deformation value be d
2, the distance between the drawing-pressing spring of both sides is designated as L, and the distance of the drawing-pressing spring and tested point Q that are out of shape less side is M, then the settlement at Q place is δ
q=d
2+ (d
1-d
2) M/L, the sedimentation and deformation value being positioned at middle position C point is δ
c k=(d
1+ d
2)/2, the change of the Rayleigh scattering occurred based on wavy loopback fiber and the optical information such as Fresnel reflection, Brillouin scattering, monitoring distortion value is this moment δ
c o, initial deformation value is
then for same centre position monitor sedimentation difference absolute value be
for building the computing formula of native stone calmodulin binding domain CaM non-uniform settling, definition non-uniform settling parameter ω, and the expression formula of ω is defined as
based on this monitoring device principle of work and above-mentioned derivation, the final settlement computing formula at tested point Q place is
Beneficial effect: a kind of hydro-structure distortion distributed optical fiber sensing device of the present invention, the all easy-to-dismount design of all component, greatly facilitate engineering transportation and use, the flexible lifting of sensing drill bit and the contraction by controller control drill bit, greatly add device repeatably to use, effect of installation and repairing and maintenance easily, retain the simple of current traditional monitoring instrument, advantage intuitively, and both can be elevated taper bit by halliard, also the balance of taper bit can be corrected, merge the real-time of current up-to-date fiber optic monitoring technology, distributed, high precision, low cost, high sensitivity, not by electromagnetic interference (EMI), many complex environments adaptability characteristic, research and development can carry the reliable monitoring device of new and old technology altogether, it is made to have each technical advantage concurrently, expand its using function, greatly reduce engineering monitoring and testing cost, when ensureing existing distribution type fiber-optic maximum monitoring distance (within the scope of 25km), spatial resolution can be brought up to mm level, monitoring accuracy, reliability and engineering practicability obtain larger lifting.
Accompanying drawing explanation
Fig. 1 is installation drawing of the present invention;
Fig. 2 is vertical view of the present invention;
Fig. 3 is the A-A sectional view of Fig. 1 of the present invention;
Fig. 4 is the vertical operation schematic diagram surveying chi in Fig. 1.
Wherein: 1-leads to end vertical shaft; 2-gear shaft; 3-halliard; 4-drill bit drive unit; 5-drawing-pressing spring; 6-vertically surveys chi; 7-scale platform; The wavy loopback fiber of 8-; 9-light wave transmitter; 10-light wave collector; 11-optical fiber button; Bucket hung by 12-optical fiber; 14-taper bit; 15-conjugates platform; 16-river bottom protection boss.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further described.
As shown in Figures 1 to 4, a kind of hydro-structure distortion distributed optical fiber sensing device of the present invention, comprises vertical shaft of the logical end 1, is provided with displacement platform 15 in vertical shaft of the described logical end 1, displacement platform 15 is monosymmetricly provided with drill bit drive unit 4, and drill bit drive unit 4 is connected with taper bit 14; The drill bit drive unit 4 of displacement platform 15 both sides is connected with halliard 3 respectively, and halliard 3 is wrapped on take-up reel, and take-up reel is arranged on gear shaft 2, and the gear on gear shaft 2 engages with transmitting gear, and transmitting gear is driven by motor; In the middle part of displacement platform 15, one end of the spring installed symmetrical with a pair is connected, the other end of spring is with vertically to survey chi 6 hinged, vertical survey chi 6 is through scale platform 7, scale platform 7 is positioned at the crossbeam be arranged on vertical shaft of the logical end 1, be provided with optical fiber between two springs and hang bucket 12, the bottom that bucket 12 hung by optical fiber is connected with displacement platform 15, optical fiber is hung in bucket 12 and is provided with wavy loopback fiber 8, wavy loopback fiber 8 is provided with optical fiber button 11, the input end of wavy loopback fiber 8 is provided with light wave transmitter 9, and the output terminal of wavy loopback fiber 8 is provided with light wave collector 10.
In the present invention, drill bit drive unit 4 can adopt motor to drive, hydraulic-driven or other type of drive, in the present invention, employing motor drives, what conjugate the two ends symmetry of platform 15 is provided with drive motor, drive motor is connected with driving shaft, driving shaft is provided with external thread away from one end of drive motor, taper bit 14 is arranged in push pedal, push pedal is positioned at piston cylinder, the piston cylinder other end is provided with piston, the outside one end of piston is provided with the threaded hole coordinated with external thread, drive shaft turns is driven by drive motor, and then promote piston movement by screw thread, drive push pedal is moved, thus drive taper bit 14 to move.
In the present invention, the below of described displacement platform 15 is provided with river bottom protection boss 16, and river bottom protection boss 16 can play the function arriving vertical shaft 1 bottom, the logical end in advance, protects whole device performance to play, also has huge effect when Measuring error; In actual monitoring, taper bit 14 is subjected to outside vertical load, and when will arrive bottom, river bottom protection boss 16 can arrive the bottom of vertical shaft of the logical end 1 in advance, plays damping effect.
In the present invention, taper bit 14 is symmetrical, before device is installed, symmetrical taper bit 14 is in compressive state, it is close to the outer wall of vertical shaft of the logical end 1, after Embedment and installation, by drive motor, taper bit 14 is fixed on native stone calmodulin binding domain CaM inside, contraction state before not installing can reduce engineering excavation expense and protection operation greatly, after being installed to applicable position, it can be in elongation state for a long time, greatly ensure that the tracking and monitoring that sensing drill bit is long-term to structure, when needs are safeguarded or detect, it is recoverable to, greatly improve its repeatable and monitoring accuracy.
In the present invention, vertical survey chi 6 on drawing-pressing spring 5 upper end and scale platform 7 is hinged, and the vertical initial scale surveying chi 6 flushes with scale platform 7 upper horizontal plane, the lower end of drawing-pressing spring 5 is connected with displacement platform 15, being combined as of above-mentioned parts is symmetrical, respective side settling amount is delivered on respective side drawing-pressing spring 5 by displacement platform 15 when the uneven sedimentation of native stone calmodulin binding domain CaM by both sides taper bit 14 by this combined member, drawing-pressing spring 5 vertical deformation has driven vertical chi 6 scale of surveying on scale platform 7 to change, thus directly effectively can read this side sedimentation and deformation numerical quantity on the ground.
In the present invention, optical fiber is hung in bucket 12, hang in the side parallel with drawing-pressing spring 5 and optical fiber on bucket 12 middle part, be furnished with optical fiber button 11, the upper end that the wavy loopback fiber 8 sent from light wave transmitter 9 hangs bucket 12 side from optical fiber successively can be postponed to displacement platform 15 downwards by optical fiber button 11, after through being fixed on displacement platform 15 on optical fiber button 11, in the mode in certain radian loop, upwards postpone to light wave collector 10 from the lower end of the opposite side of optical fiber extension bucket 12 successively again, and the side that optical fiber extension 12 two, bucket is laid with optical fiber button 11 has scale to indicate, as coordinate mark, axial plane in bucket 12 hung by optical fiber is elastic construction, taper bit 14 is around suffering during native stone calmodulin binding domain CaM non-uniform settling load, vertical load is passed to vertical wavy distribution by the optical fiber button 11 on the displacement platform 15 of horizontal positioned by it, be in the wavy loopback fiber 8 of middle axial plane, constantly optical information is launched in light wave transmitter 9 one end, optical information in wavy loopback fiber 8 in optical phenomena can constantly change, light wave collector 10 can constantly collect the optical information wherein changed, and then, optical information is carried out recording and stores, fusion identification is carried out by collecting different optical informations, carry out realizing in real time, distributed, micro-macroscopic monitoring soil stone calmodulin binding domain CaM sedimentation change.
In the present invention, wavy loopback fiber 8 two ports all rest on the ground, and optical time domain reflection technology can be utilized to position monitoring, utilize the Brillouin scattering technology of dual-port to carry out Quantitative Monitoring simultaneously.Dynamic distance value between the vertical survey chi 6 utilizing two ends symmetrical and the vertical settlement values surveying chi 6 can measure wherein any point settlement; Meanwhile, wavy loopback fiber 8 to external world load is extremely responsive, small distortion value also can effectively be captured, utilize the monitoring result value of wavy loopback fiber 8 to calibrate the vertical monitoring result value surveying chi 6, the settlement existed in precise monitoring soil stone calmodulin binding domain CaM can be realized everywhere.
In the present invention, it is cylindric for leading to end vertical shaft 1 main body our department, starts on the both sides of vertical shaft 1 main body of the logical end passage having taper bit 14 movement.Bucket 12 hung by optical fiber is structures that elasticity is larger, and optical fiber is hung bucket 12 and is connected with displacement platform 15 by the optical fiber button 11 be positioned on displacement platform 15.
By each assembly according to from down to up, order is from left to right assembled, and uses conventional general sensor fibre as internal placement optical fiber, explains by reference to the accompanying drawings to preferred embodiments.
(1) excavating shaft, arranges sensing drill bit
At native stone calmodulin binding domain CaM to be monitored, cutting depth is the vertical drum of 10m, and determines excavated minimum diameter based on the diameter of the vertical shaft of the logical end 1 constructed by early stage, installs for the ease of device, needs the diameter of diameter slightly larger than vertical shaft of the logical end 1 of excavation.Then be 10m by length, the diameter vertical shaft of the logical end 1 that is slightly less than excavating shaft transfers in the vertical shaft of native stone calmodulin binding domain CaM.
(2) backfill original soil, eject sensing drill bit
The original soil stone calmodulin binding domain CaM excavated out is backfilled along the space between vertical shaft and vertical shaft of the logical end 1, starter motor, taper bit 14 is placed into suitable position by below halliard 3, start drill bit drive unit 4, taper bit 14 is deep in the sidewall of the dark native stone calmodulin binding domain CaM vertical shaft of 10m, starter motor again, makes halliard 3 be in relaxed state;
(3) open each information collecting device, gather and analyze data result
When the drawing-pressing spring 5 of side is subject to the sedimentation load of the respective side transmitted from this side taper bit 14, it is d that respective side vertically surveys this side sedimentation and deformation value that chi 6 monitors
1, meanwhile, when opposite side drawing-pressing spring 5 is subject to the sedimentation load from the corresponding side of transmitting to its respective side taper bit 14, corresponding vertical survey chi 6 monitor this side sedimentation and deformation value be d
2, the distance between the drawing-pressing spring 5 of both sides is designated as L, and the drawing-pressing spring 5 being out of shape less side is M with the distance of tested point Q, then the settlement at Q place is δ
q=d
2+ (d
1-d
2) M/L, the sedimentation and deformation value being positioned at middle position C point is δ
c k=(d
1+ d
2)/2), the Rayleigh scattering occurred based on wavy loopback fiber 8 and the change of the optical information such as Fresnel reflection, Brillouin scattering, monitoring distortion value is this moment δ
c o, initial deformation value is
then for same centre position monitor sedimentation difference absolute value be
for building the computing formula of native stone calmodulin binding domain CaM non-uniform settling, definition non-uniform settling parameter ω, and the expression formula of ω is defined as
based on this monitoring device principle of work and above-mentioned derivation, the final settlement computing formula at tested point Q place is
Open light wave transmitter 9 and light wave collector 10, the vertical survey chi 6 on adjustment scale platform 7, the primary data of each measured value harvester of record initial time, and correct; After treating time t, light wave transmitter 9 and light wave collector 10 can collect continuous data, Monitoring Data is processed, be extracted in the measured value of t, based on the basic parameter of used optical fiber, utilize the relation of itself and ess-strain to be obtained by the strain value in this moment, after can obtain sedimentation and deformation value now through integration, record is now (δ by light wave transmitter 9 and the result collected by light wave collector 10
o)
t, the distortion value (δ after having deducted initial time correction
o)
0afterwards, obtaining now relative magnitude is (δ
o)
t-(δ
o)
0, the distortion value now using vertical survey chi 6 to record is (δ
r)
t, the initial magnitude corresponding with it is (δ
r)
0, the relative magnitude obtained is (δ
r)
t-(δ
r)
0, the non-uniform settling parameter obtaining this moment t is | (δ
o)
t-(δ
o)
0-((δ
r)
t-(δ
r)
0)/2|/((δ
o)
t-(δ
o)
0), on the right side of the positional distance of tested point, the vertical distance surveying chi 6 is l, is L based on the vertical normal pitch surveying chi 6 (11), and when moment t, left and right sides vertically surveys the sedimentation scale displayed value of chi 6 is D
t 1and D
t 2, and D
t 1> D
t 2, the formula calculating non-uniform settling based on this device is
Then show that point to be monitored at the settling amount of t is:
(4) aggregation process result of calculation, the in time native stone calmodulin binding domain CaM sedimentation condition of diagnosis
Utilize above-mentioned instrument and monitoring method can obtain certain a bit in each not sedimentation result in the same time, time-history curves and certain moment soil stone calmodulin binding domain CaM settlement space figure of arbitrfary point can be drawn by data processor, by analyzing time-history curves and the space diagram in region to be measured, monitor the sedimentation condition in this region in real time, Timeliness coverage abnormal occurrence, in time detection and maintenance.
The above is only the preferred embodiment of the present invention; be noted that for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (6)
1. a hydro-structure distortion distributed optical fiber sensing device, is characterized in that: comprise vertical shaft of the logical end, is provided with displacement platform in vertical shaft of the described logical end, and monosymmetric on displacement platform is provided with drill bit drive unit, and drill bit drive unit is connected with taper bit; The drill bit drive unit of displacement platform both sides is connected with halliard respectively, and lift cord wrapping is on take-up reel, and take-up reel is arranged on gear shaft, and the gear on gear shaft engages with transmitting gear, and transmitting gear is driven by motor; In the middle part of displacement platform, one end of the spring installed symmetrical with a pair is connected, the other end of spring is with vertically to survey chi hinged, vertical survey chi is through scale platform, scale platform is positioned on the crossbeam that is arranged on vertical shaft of the logical end, be provided with optical fiber between two springs and hang bucket, the bottom that bucket hung by optical fiber is connected with displacement platform, optical fiber is hung in bucket and is provided with wavy loopback fiber, wavy loopback fiber is provided with optical fiber button, the input end of wavy loopback fiber is provided with light wave transmitter, and the output terminal of wavy loopback fiber is provided with light wave collector.
2. hydro-structure distortion distributed optical fiber sensing device according to claim 1, is characterized in that: described halliard is provided with scale.
3. hydro-structure distortion distributed optical fiber sensing device according to claim 1, is characterized in that: the upper surface of vertical shaft, the described logical end is provided with level meter.
4. hydro-structure distortion distributed optical fiber sensing device according to claim 1, is characterized in that: the below of described displacement platform is provided with river bottom protection boss.
5. hydro-structure distortion distributed optical fiber sensing device according to claim 1, is characterized in that: be provided with Compress Spring below described displacement platform.
6. a monitoring method for hydro-structure distortion distributed optical fiber sensing device, is characterized in that, comprise the following steps:
1st step, under zero load, halliard is totally released, displacement platform and the parts that carry thereof are relax to the lowermost end of vertical shaft of the logical end, allow river bottom protection boss touch the bottom surface of vertical shaft of the logical end, test drawing-pressing spring and the vertical duty surveying chi, wavy loopback fiber work condition is monitored with light wave transmitter, light wave collector, after treating that above-mentioned operation completes, in no abnormal situation, each parts are returned to original initial position;
2nd step, in native stone calmodulin binding domain CaM, the groove of excavation and vertical shaft shape similar of the logical end, by the balance between level meter adjustment vertical shaft of the logical end and native stone calmodulin binding domain CaM, then motor drives halliard to transfer taper bit, displacement platform and river bottom protection boss, after dropping to assigned address, by checking the scale on halliard, make the length conjugating platform both sides halliard equally long, make displacement platform, taper bit is in horizontal equilibrium position, by hinged for the vertical survey chi on prior mounted drawing-pressing spring and scale platform, the wavy loopback fiber being installed to optical fiber extension bucket is drawn out to light wave transmitter and light wave collector place,
3rd step, promotes taper bit by drill bit drive unit and passes from vertical shaft of the logical end, in the native stone calmodulin binding domain CaM that taper bit deepens continuously around vertical shaft of the logical end the most at last;
4th step, when the drawing-pressing spring of side is subject to the sedimentation load of the respective side transmitted from this side taper bit, it is d that respective side vertically surveys this side sedimentation and deformation value that chi monitors
1, meanwhile, when opposite side drawing-pressing spring is subject to the sedimentation load from the corresponding side of transmitting to its respective side taper bit, corresponding vertical survey chi monitor this side sedimentation and deformation value be d
2, the distance between the drawing-pressing spring of both sides is designated as L, and the distance of the drawing-pressing spring and tested point Q that are out of shape less side is M, then the settlement at Q place is δ
q=d
2+ (d
1-d
2) M/L, the sedimentation and deformation value being positioned at middle position C point is δ
c k=(d
1+ d
2)/2), the change of the Rayleigh scattering occurred based on wavy loopback fiber and Fresnel reflection, Brillouin scattering optical information, monitors that to be out of shape value be δ this moment
c o, initial deformation value is δ
cI o, then for same centre position monitor sedimentation difference absolute value be | (δ
c o-δ
cI o)-δ
c k|, for building the computing formula of native stone calmodulin binding domain CaM non-uniform settling, definition non-uniform settling parameter ω, and the expression formula of ω be defined as ω=| (δ
c o-δ
cI o)-δ
c k|/δ
c o, based on this monitoring device principle of work and above-mentioned derivation, the final settlement computing formula at tested point Q place is
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| CN106049399B (en) * | 2016-05-26 | 2018-06-12 | 南京大学 | A kind of distributed fibre optic sensing foundation deformation, the method for determining ground failure mode and bearing capacity |
| CN108195330B (en) * | 2018-01-26 | 2019-07-12 | 中国计量大学 | A kind of underground displacement sensor delivery device |
| CN109163665B (en) * | 2018-06-15 | 2020-04-14 | 广东电网有限责任公司 | Civil structure point three-dimensional displacement monitoring method based on distributed optical fiber sensing technology |
| CN111576380B (en) * | 2020-05-29 | 2022-01-07 | 杭州市城市建设基础工程有限公司 | Foundation bearing capacity detection method |
| CN114370967B (en) * | 2021-12-16 | 2023-03-24 | 之江实验室 | Three-dimensional force sensor based on polymer optical fiber junction and detection method |
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