CN104655033A - Fiber-optic gyroscope technology-based method and device for detecting deformation of underwater engineering structures - Google Patents
Fiber-optic gyroscope technology-based method and device for detecting deformation of underwater engineering structures Download PDFInfo
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- CN104655033A CN104655033A CN201310587508.1A CN201310587508A CN104655033A CN 104655033 A CN104655033 A CN 104655033A CN 201310587508 A CN201310587508 A CN 201310587508A CN 104655033 A CN104655033 A CN 104655033A
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- fiber
- optic gyroscope
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- gyroscope
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- Length Measuring Devices With Unspecified Measuring Means (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention discloses a fiber-optic gyroscope technology-based method and device for detecting deformation of underwater engineering structures. The device consists of a fiber-optic gyroscope 1, a linear velocity sensor 4 and a signal reception and storage unit 2, which are sealed in a container. According to the method and the device, the characteristic that the fiber-optic gyroscope is sensitive to angular velocity is utilized, sealing container is pulled to move along a detected object; the data detected by the fiber-optic gyroscope and the linear velocity sensor are processed; and the one-dimensional or three-dimensional movement locus of the device, namely, the one-dimensional or three-dimensional deflection and deformation condition of the detected object, can be obtained by computing according to a formula. Aiming at the problem of the traditional method for monitoring the deformation of large-scale underwater engineering structures, the invention provides a detection method which is more accurate, convenient to implement and continuous.
Description
Technical field
The present invention relates to a kind of undersea detection technology, particularly a kind of method and device detecting Underwater Engineering Structure deformation based on fiber-optics gyroscope.
Background technology
In many Large Underwater engineering structures, monitoring works structural deformation can obtain important information, the maximum deflection value of such as panel can as a kind of design class of face dam Deformation control than index, and the change of shape of underwater pipeline is the important parameter of assessment pipeline work.Due to the restriction of actual observation condition, the traditional measurement method of these Large Underwater engineering structures implements all exists very large problem, wherein the determination of reference point is maximum difficult point, such as, in the measurement of dam and underwater pipeline, finds reference point under water quite difficult; Secondly, classic method cannot accurately be measured at all continuously, can only be extrapolated the value of other points by certain some measured value; In addition, the underwater erection of instrument is also one of difficult point.
Summary of the invention
The object of the invention is the difficulty existed for Large Underwater engineering structure shape changing detection, provide one more accurate, be convenient to method and the device of the continuous detecting implemented.
The object of the invention is to be realized by following technical scheme: the method detecting Underwater Engineering Structure deformation based on fiber-optics gyroscope, the method is the characteristic utilizing fibre optic gyroscope diagonal angle speed sensitive, traction optical fiber gyroscope moves along measurand (as dam facing, underwater pipeline etc.), integration is carried out to the angular velocity recorded and obtains angle, then the movement locus of package unit is obtained by formulae discovery, the namely shape of measurand, the result that twice records is compared, just can obtain the deformation values of measurand.
The above-mentioned device used based on the method for fiber-optics gyroscope detection Underwater Engineering Structure deformation comprises: fibre optic gyroscope, Signal reception storage unit, computer interface, linear velocity trans, shell.And shell can move along measurand under external force drives, and measurement data is sent to computing machine by computer interface and carries out data processing.Shell possesses good sealing, waterproof and interference free performance.
Fibre optic gyroscope is the angular-rate sensor of the interference effect based on light, and the advantage of its uniqueness is it with this absolute magnitude of the light velocity for reference system, is an absolute measurement mode.
Ultimate principle of the present invention is see Fig. 2.Suppose that fibre optic gyroscope is along curvilinear motion in figure, sampling time interval is △ t, at i moment (Xi, Yi) be θ i with the angle of X-axis, now the linear velocity of gyro is Vi, the angular velocity that fibre optic gyroscope records is Ω, is enough hour of △ t when the time interval recorded, and the coordinate of i+1 point can obtain with formula approximate treatment once.
X=X
i+1X
i=L×cos
i
Y=Y
i+1Y
i=L×sin
i
Wherein, with the angle of X-axis
i=
i1the distance L=V passed by+× t, t
i× t.
Just can draw the actual motion track of gyro after calculating all coordinates, i.e. the geometric configuration of tested surface, thus determine the parameters such as its amount of deflection, collimation and deformation.
As from the foregoing, the method for Underwater Engineering Structure deformation is detected based on fiber-optics gyroscope and device advantage is: only with determining a reference point, namely measuring the parameter of starting point, just accurately can measure the parameter of every other point continuously.And this device all seals in a vessel, only need draw this device during detection and move one time along the track preset or original pipeline.The method and device are easier to implement relative to needing the classic method of multiple reference point, and thoroughly solve the deficiency that classic method can only measure specific several point.
In addition, the present invention can on the basis of original method and apparatus, and adopt the strapdown inertial surveying system based on fiber-optics gyroscope to detect the 3D shape curve of Underwater Engineering Structure, this will be an important breakthrough of structural deformation detection method in engineering.
Accompanying drawing explanation
Fig. 1 is the device schematic diagram that fiber-optics gyroscope detects Underwater Engineering Structure deformation
Fig. 2 is the schematic diagram detecting Underwater Engineering Structure deformation method based on fiber-optics gyroscope
In figure: 1-fibre optic gyroscope, 2-Signal reception storage unit, 3-computer interface, 4-linear velocity trans, 5-shell, 6-measurand.△ t is sampling time interval, θ i is i moment angle, and Vi is i time line speed.
Embodiment
Shown in Fig. 1 and Fig. 2: detect the basic composition of the device of Underwater Engineering Structure deformation based on fiber-optics gyroscope as shown in Figure 1.This device comprises fibre optic gyroscope 1, Signal reception storage unit 2, computer interface 3, linear velocity trans 4, shell 5.Fibre optic gyroscope 1, Signal reception storage unit 2, computer interface 3, linear velocity trans 4 are all contained in the sealing shell 5 of waterproof, and shell 5 can move along measurand 6 under external force drives, and measurement data is sent to computing machine by computer interface 3 and carries out data processing.Shell 5 possesses good sealing, waterproof and interference free performance, can adapt to severe external environment condition under water.
Determine the parameters such as the pitch angle of starting point before measurement, need in measurement to pull this device to roll along the track preset or pipeline by external force.But this application of installation is when dam deformation detects, preset a track at the Dam Construction initial stage, just can irregular enforcement monitor; Then original pipeline can be directly utilized when being applied to underwater pipeline deformation detection.The method is compared, and traditional measurement method precision is higher is easier to realization.
Claims (2)
1. one kind is detected the method for Underwater Engineering Structure deformation based on fiber-optics gyroscope, it is characterized in that: the characteristic utilizing fibre optic gyroscope diagonal angle speed sensitive, traction optical fiber gyroscope moves along measurand, integration is carried out to the angular velocity recorded and obtains angle, then the movement locus of package unit is obtained by formulae discovery, the namely shape of measurand, compares the result that twice records, and just can obtain the deformation values of measurand.
2. method according to claim 1 and the device adopted is characterized in that: this device comprises fibre optic gyroscope (1), Signal reception storage unit (2), computer interface (3), linear velocity trans (4), shell (5).Fibre optic gyroscope (1), Signal reception storage unit (2), computer interface (3), linear velocity trans (4) are all contained in the sealing shell (5) of waterproof, and shell (5) can along measurand (6) motion under external force drives, and measurement data is sent to computing machine by computer interface (3) and carries out data processing.Shell (5) possesses good sealing, waterproof and interference free performance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310587508.1A CN104655033A (en) | 2013-11-19 | 2013-11-19 | Fiber-optic gyroscope technology-based method and device for detecting deformation of underwater engineering structures |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310587508.1A CN104655033A (en) | 2013-11-19 | 2013-11-19 | Fiber-optic gyroscope technology-based method and device for detecting deformation of underwater engineering structures |
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| Publication Number | Publication Date |
|---|---|
| CN104655033A true CN104655033A (en) | 2015-05-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310587508.1A Pending CN104655033A (en) | 2013-11-19 | 2013-11-19 | Fiber-optic gyroscope technology-based method and device for detecting deformation of underwater engineering structures |
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| CN (1) | CN104655033A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110319809A (en) * | 2019-07-16 | 2019-10-11 | 江西省水利厅工程建设稽察事务中心 | The wire type monitoring device and its monitoring method with appearance are seen in dam |
-
2013
- 2013-11-19 CN CN201310587508.1A patent/CN104655033A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110319809A (en) * | 2019-07-16 | 2019-10-11 | 江西省水利厅工程建设稽察事务中心 | The wire type monitoring device and its monitoring method with appearance are seen in dam |
| CN110319809B (en) * | 2019-07-16 | 2021-05-14 | 江西省水利厅工程建设稽察事务中心 | Line type monitoring device and method for dam interior and appearance |
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| PB01 | Publication | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150527 |