CN103348087A - Parameter sensing and monitoring - Google Patents

Abstract

Apparatus and method for monitoring at least one parameter associated with an elongate structure are disclosed. The apparatus may include at least one elongate support body element arranged along a longitudinal structure axis associated with an elongate target structure; and at least one optic fibre element arranged substantially helically along a longitudinal body element axis associated with the at least one support body element. A method of manufacturing flexible pipe body is also disclosed.

Description

Parameter sensing and monitoring

The present invention relates to for the method and apparatus of monitoring with at least one parameter of structurally associated.Especially but by halves, the present invention relates to a kind of for monitoring be positioned on the structure or the method for fibre system, thereby obtain strain in the expression structure and/or the data of temperature.

Have in many technical fields, every now and then or continuously monitoring is useful with one or more parameters of structurally associated.For example, every now and then, should repeat or monitor continuously bridge, road surface, ground region, lamppost, blade of wind-driven generator, yacht mast, hang feed cable etc., make it possible to identify the information of any potential problems of representing structure, take remedial action then.

The structure of wishing the another kind of type monitor is, at sea the nothing of the type of using in the oil and natural gas industry in production field bonding flexible pipe.This flexible pipe comprises that its one or more ends have one section flexible pipe body of end fitting.Flexible pipe can be used as line of flow (flow line), standpipe, wire jumper (jumper) etc.Need to monitor the dynamic behaviour of this pipeline day by day.The monitoring strain (tension force, strain) and/or temperature and/or some other parameters be the past of assessment pipeline, the method for current and/or future performance.

For all structures, will experience many different power.This may cause very complicated load, and includes, but are not limited to; Deadweight, internal pressure, tensile force (tension), vortex-induced vibration, bending, distortion etc.

A kind of method that has been proposed to be used in the parameter of monitoring and this structurally associated is to use fibre system.Optical fiber can be used as strain gauge, thermometer, temperature indicator, and can carry out strain measurement, this can according to optical fiber be detected and zone/sensor be arranged in the optical fiber mode and by localization, distribution or half point cloth.WO2009/068907 discloses a kind of method, and wherein, optical fiber can twine around the flexible pipe spiral, and can determine some measurement of gathering from the parameter relevant with pipeline, and the disclosure integral body of described patent is incorporated this paper into.

System although it is so can make some parameter relevant with pipeline be determined really, but the scope that this optical system can be used is restricted.One of them reason is, optical fiber is the comparison fragility in essence, and if just monitored foundation structure be easy to occur a large amount of mechanical movements, then can in optical fiber, cause mechanical stress and strain, cause producing the fiber fault.

Therefore, up to the present, the restriction that the optical fiber purposes is subjected to is, for the unsuitable restriction of fibre movement.

In addition, can reduce the peak strain of seeing by optical fiber to a certain extent though be wrapped in to fiber spiral the main body method on every side of structure (as at the flexible pipe as shown in the WO2009/068907), but its being limited in essence, if the length poor fit is distinguished by a section spiral line and employed optical time domain reflectometer/optical time-domain analyzer system, then they can not be used for the measurement of using at circumferential discontinuous construction along single axis or accurate data are provided.

According to manufacturer's recommendation, be at present based on the strain restriction of the limit tensile strain (UTS) of fiber optic cables in 1% the scope.Therefore, the strain of using commercially available optical fiber to measure more than 1% needs a kind of method, and it can reduce the strain capacity that fiber stands, thereby improves the ability that its measurement exceeds the strain level of its UTS limit value.

The objective of the invention is, alleviate the problems referred to above at least in part.

The purpose of some embodiment of the present invention is, a kind of method is provided, and is used for reducing the strain that optical fiber stands, thereby do not have under the situation of fault at any parts of monitoring system, makes foundation structure to be tightened up, and this strain can be monitored and measure.

The purpose of some embodiment of the present invention is, a kind of apparatus and method are provided, be used for monitoring and slim-lined construction (such as, but not limited to, flexible pipe, turbine blade, aircraft wing, yacht mast etc.) relevant parameter.

The purpose of some embodiment of the present invention is, a kind of parameter measurement/monitoring system based on optical fiber is provided, this system provides a good resolution, that is to say, the mass data point of each unit length of object construction is provided, also have in addition, with the strain the experienced foundation structure decoupling from the fiber-optic monitoring system.

The purpose of some embodiment of the present invention is, the strain measurement system of a kind of localization, half point cloth or distribution is provided, and it can utilize Bragg grating (Bragg gratings) and/or Brillouin scattering (Brillouin scattering) in the fibre system.

The purpose of some embodiment of the present invention is to provide a kind of method and apparatus, for monitoring temperature and/or strain and/or some other parameter relevant with foundation structure.

According to a first aspect of the invention, provide a kind of device, be used for the device of monitoring at least one parameter relevant with slim-lined construction, described device comprises:

At least one elongated support body member along the vertical structure axis setting relevant with elongated object construction; The vertical body element axis relevant with at least one supporter element with the edge be at least one fiber optic component of spiral setting basically.

According to a second aspect of the invention, provide a kind of for monitoring at least one parameter relevant with slim-lined construction, it may further comprise the steps: provide along at least one elongated support body member of the vertical structure axis relevant with elongated object construction, it comprises the edge vertical body element axis relevant with body element at least one fiber optic component of spiral setting basically; And via sensing system, monitor at least one feature relevant with fibre element, the parameter that described character representation is relevant with slim-lined construction.

According to a third aspect of the invention we, provide a kind of method of making flexible pipe body, it comprises: provide fluid to keep layer; At least one armor (armour layer) is provided; And provide along at least one elongated support body member of the vertical body axis relevant with body, it comprises the edge vertical body element axis relevant with body element at least one fiber optic component of spiral setting basically.

According to a forth aspect of the invention, a kind of device for monitoring at least one parameter relevant with slim-lined construction is provided, it comprises: along with vertical body element axis of elongated support body member at least one fiber optic component of arranging of spiral basically, described body element longitudinally structure axis arranges; Wherein, the structure axis correlation length that separates and between first plane and second plane, twine with preset space length greater than fiber optic component perpendicular to the length of first plane of vertical structure axis and the fibre element between second plane longitudinally.

Some embodiment of the present invention provides following advantage: can be arranged on the length of the optical fiber between the Chosen Point of object construction greater than the available correlation length of prior art.Extra length with respect to prior art refers to, if the length of foundation structure is dwindled or extended certain distance, then has in optical fiber and proportionally dwindles or extend, and it dwindles/extend less than existing technique known experience.

Some embodiment of the present invention provides following advantage: optical fiber can be wound with basic spiral way around the basic supporting layer that the predetermined length of the structure of being monitored along parameter is located.This makes optical fiber to be positioned properly and to monitor with effective means.

Now will only with way of example embodiments of the invention be described with reference to the accompanying drawings hereinafter, wherein:

Fig. 1 illustrates and freely hangs the catenary suspension type continuous vulcanization standpipe;

Fig. 3 illustrates the zone of flexible pipe;

Fig. 2 illustrates the bending of crooked reinforcing rib and body;

Fig. 4 illustrates the optical fiber that twines around the foundation cylinder body;

Fig. 5 illustrates winding optical fiber;

Fig. 6 illustrates winding optical fiber;

Fig. 7 illustrates the supporter and the optical fiber that arrange with linear mode and twines;

Fig. 8 illustrates the supporter and the optical fiber that arrange in a spiral manner and twines;

The rectangle supporter is shown Fig. 9 and optical fiber twines; And

Figure 10 illustrates for monitoring the parameter relevant with flexible pipe and the system that analyzes.

Fig. 1 illustrates flexible pipe (10), and it comprises one section flexible pipe body (11), and first end (12) of flexible pipe body has end fitting (13) and the other end (14) has the other end accessory (15).Flexible pipe extends to surf zone (17) from sea-bed area (16).Floating platform (18) is used for the upper end accessory (15) of stationary pipes.Crooked reinforcing rib (19) is used to limit the bending of flexible pipe, will be understood that as those skilled in the art.

Therefore, Fig. 1 illustrates the example of slim-lined construction (being flexible pipe in this case), wherein, the mobile fluctuation that can cause stress and strain and/or temperature frequently or constantly that in flexible pipe, causes, this is desirable for monitoring.

Should be appreciated that some embodiment of the present invention is applicable to far-ranging structure, wherein, monitored with one or more parameters of these structurally associateds.For example, replace flexible pipe, embodiments of the invention also can be monitored the part of bridge, road surface and/or land area and/or lamppost and/or wind turbine blade and/or yacht mast and/or suspended cables etc.

Get back to the flexible pipe shown in Fig. 1 again, confirmable parameter is, to the fatigue damage of tubular structure, as in this system, this regional prediction is to be the zone that the maximum fatigue damage of the tensile layer of flexible pipe can take place under crooked reinforcing rib.Some embodiment of the present invention provides a kind of system, and it is stored in the data of collecting in the database, but this real-time implementation or afterwards certain time realize, be used for understanding fatigue and the motor behavior of the pipeline in the service.This can with the predicted value of storage in advance relatively, this will allow the life prediction improvement to pipe-line system, and/or problem of implementation or fault are carried out early prediction.

System can be used to the calibration system model, and to predict the behavior of real world system more accurately, this will allow to make system's design have littler conservative based on revising model.

The parameter that is conducive to monitor in such system is, height is answered the zone of the pipeline in the step-down curvature system, and it is predicted to be the inside at the crooked reinforcing rib of riser top.High strain and the highest top side curvature are stood in this zone, and they combine, tensile layer is produced the zone of maximum fatigue damage.

Because the curvature of pipeline is from the most advanced and sophisticated beginning of crooked reinforcing rib decay rapidly on about 5 to 6 meters, so will be by measuring curvature in this zone and fitting data to providing the curve to the forecast model of the estimation of excitation maximum curvature to infer maximum curvature.Modeling is (such as Orcaflex ^TMAnd/or local generation model) can forecasting institute the curvature of pipe-line system of design, and can produce scale model for service system.Fig. 2 how to illustrate by analyze can provide show production system (shown in example in standpipe) the scheme of curvature prediction.The x axle is the metering of the pipeline around the crooked reinforcing rib, thus Fig. 2 illustrate from more than the flange of crooked reinforcing rib (15) 6 meters to following 11 meters of crooked reinforcing rib flange (11 meters).The crooked reinforcing rib of central horizontal line (21) expression covers the zone of pipeline.In this system, peak value curvature is predicted, and this is equivalent to the minimum bending radius of about 8 meters pipeline at about 0.9 to 1 meter, yet in lower area (20), measured radius is only between between 1,000 meter of 50 meters and 9 meters ends of 5 meters ends.This is that the curvature measurement system will measure.

The shape of prediction curve is similar to the system that is monitored, so though each riser systems has difform attenuation curve, the different wave pattern that this curve will stand for standpipe are similar.Therefore, if curve shape is known, and use fibre system to measure curvature, then can predict maximum curvature by using curve fitting algorithm.Can calculate fatigue damage on maximum impaired loci in conjunction with curvature data and strain.By fatigue data, residual life that can prognoses system.Actual damage is with respect to the prediction damage.The variation of pipeline behavior shows may damage may drifting about of riser systems.

Monitoring system can be utilized the sensors of various types system.One, two or more sensors of various types systems can be used to provide data point, in order to further analyze.For example, can use the strain gauge of the total tensile force that detects the flexible pipe upside or load cell etc. or determine the tensile force in the system by applied stress measuring method (as MAP, it uses magnetic sensor to determine the stress that produces in flexible pipe).The sensor of spendable another kind of type is slant angle sensor.This provides very Useful Information, and it can indicate the inclination of ship or crooked reinforcing rib.

There are one or more methods of using optical fiber to determine strain.Replacedly or additionally, optical fiber can be used for determining the temperature along the position of structure.This will be an example of distributed system.Embodiments of the invention are not limited to such distributed system.Optical fiber is as distributed strain instrument (or thermometer), and it provides the mean strain value of the optical fiber of predetermined (for example, 1 meter) length, as data point.Then, one meter average moves about 400 millimeters, and has provided another data point.Therefore, provide strain above 1m optical fiber to the fibre length of every 400mm.An advantage of this system is, can utilize the quantity of data point of relatively inexpensive optical fiber and generation very high.

Fig. 3 illustrates other position of the monitoring that wherein can utilize the parameter relevant with flexible pipe.These positions comprise sub-sea arch (sub-sea arch) (30) and/or touchdown point (touchdown) (31), and wherein, the scope of the strain that produces in flexible pipe can be up to positive and negative 7% or bigger, and can monitor the length of hundreds of rice.Pipe-line system will need these measurements, and wherein, the position of the high fatigue damage of prediction is upper area not necessarily, and may be other position.Other zone that can monitor comprises optional whole length.

Brillouin scattering and/or Bragg grating or other detection technology can use with the optical fiber according to some embodiment of the present invention.Bragg grating uses the optical fiber that has write discrete grid block in the zone, and this zone is as strain meter (or temperature measuring set).These systems work under high frequency, and very accurate, because they can pick up strain or temperature along very little zone (5mm or littler).Can be on single fiber multiplexing Bragg grating.That is to say that as long as reflection frequency is not overlapping, challenger can be seen of farther place by a Prague.

Fig. 4 illustrates one or more optical fiber (40) and how to twine and to be bonded to cylinder supporter (41) around cylinder supporter (41) with spiral form.Therefore tension cylinder supporter (41) can strain optical fiber.As a kind of alternative method that optical fiber (41) directly is bonded to cylinder, helicla flute (50) can be formed in the cylinder, to hold fiber as shown in Figure 5.Fig. 6 illustrates by the adhesive such as epoxy resin etc. and is positioned in the endoporus of pipe and remains on spiral optical fiber on the correct position.

As shown in Figure 4, the cross section of supporter (41) is circular basically, has the cross section that diameter is d.Have fibre length between isolated plane A, B, this isolated plane is with respect to the longitudinal axis X relevant with supporting member and axially spaced, its separating distance P, and this distance P is represented the spacing of the winding of optical fiber (40) in Fig. 4.Be understandable that the length of fiber is provided by equation 1:

$L=\sqrt{{\left(\mathrm{\πd}\right)}^2+P^2}$ Equation 1

This is shown in Fig. 4.

Fig. 7 show that the optical fiber shown in Fig. 4 to 6 twines and supporter (41) the longitudinal axis the Y how edge is relevant with monitored object construction with the linear arrangement setting.As shown in Figure 7, provided by equation 2 from the fibre length along longitudinally-spaced two the plane A of the axis Y of object construction to B:

$L=\frac{H}{P}\sqrt{{\left(\mathrm{\πd}\right)}^2+P^2}$ Equation 2

Here, H is the distance of measuring strain.

To experience the strain identical with cylinder along the direct bonding optical fiber of the length of cylinder (41).By twining the length that fiber increases fiber around supporter, can reduce the overall strain that fiber stands.Remove to amplify (de-amplification) to what the part of given length increased that twining amount can produce bigger strain.The cylinder that this method allows to have bonding optical fiber stands the strain around radius R, and it surpasses the breaking strain of fiber.Rightly, the diameter of supporter is enough little, satisfies the length of distinguishing of employed sensing system with the minimum value that allows a circle.

Rightly, conveyor screw is twined and relatively tightly closely near basic main body, to realize the high Upon Cooperative Efficiency of amplifying of going.

Rightly, supporter keeps elasticity at big range of strain.

Because with respect to strain axis, need to realize that the high-strain-rate angle is big (for example, only produce in theory with respect to 45 ° of strain axis 1.4:1 geometry go to amplify Upon Cooperative Efficiency, therefore actual value may be slightly higher than this value, this be because, dwindle because poisson effect makes to support, this be lower than the big strain of measuring in elasticity or the height bending system required go the Upon Cooperative Efficiency of amplifying), so supporter is enough big, thereby can bring any damage or surpass critical angle fiber.Alternatively, fibre length and fiber and the angle that should change direction are suitably mated, obtaining the optimum measurement requirement, such as, but not limited to, sensitivity, resolution ratio and go to amplify.

Rightly, be no more than the minimum bending radius of optical fiber.Rightly, the radius of curvature of the optical fiber that twines around supporter is so not tight, makes the fiber border surpass the critical angle relevant with optical fiber.

Fig. 8 illustrates another kind of method, and wherein, optical fiber and braced structures can arrange with respect to the basic target structure.As shown in Figure 8, not to place supporter along the longitudinal axis of object construction with linear mode, but make the optical fiber itself that supporter and spiral twine to twine around the object construction spiral.This has further strengthened bigger fibre length introduced between this plane along the longitudinal axis of object construction and (has reached to set a distance).

For example, as shown in Figure 8, provided by equation (3) to the fiber lengths of B apart from the plane A that is separated by distance H:

$L=\frac{\sqrt{{\left(\mathrm{\πD}\right)}^2+H^2}}{P}\sqrt{{\left(\mathrm{\πd}\right)}^2+P^2}$ Equation 3

Fig. 9 illustrates an alternative embodiment of the invention, and wherein, optical fiber (90) twines around base support body (91) spiral of the substantial rectangular cross section with band circular end zone (92).The length of supporter (91) is b, and the width of supporter is d.That separate at the longitudinal axis along supporter and basically the fibre length between the perpendicular adjacent plane be P.This is the winding spacing of optical fiber.Fibre length L is provided by equation (4):

$L=\sqrt{{(\mathrm{\πd}+2(b-d))}^2+P^2}$ Equation (4)

Can utilize optical fiber (90) among Fig. 9 and the bar (91) of rectangular shape, described in Fig. 7 as mentioned above or Fig. 8.In other words, according to Fig. 7, can optical fiber and rectangle supporter be set linearly along the longitudinal axis relevant with object construction.Therefore, at least one fiber optic component is along the vertical body element axis basically spiral setting relevant with at least one supporter element, and this supporter element itself is arranged along the vertical structure axis relevant with vertical object construction.Perhaps, as shown in Figure 8, optical fiber and rectangle supporter itself can twine along the longitudinal axis spiral of object construction.Therefore, at least one fiber optic component is along the vertical body element axis basically spiral setting relevant with at least one supporter element, and this supporter element itself arranges along the vertical structure axis relevant with elongated object construction.

When optical fiber and rectangle supporter twined with linear mode shown in Figure 7, the fibre length from A to B (L) was:

$L=\frac{H}{P}\sqrt{{(\mathrm{\πd}+2(b-d))}^2+P^2}$ Equation 5

When optical fiber and rectangle supporter arranged as shown in Figure 8, the fibre length L from A to B was:

$L=\frac{\sqrt{{\left(\mathrm{\πD}\right)}^2+H^2}}{P}\sqrt{{(\mathrm{\πd}+2(b-d))}^2+P^2}$ Equation 6

Should be appreciated that one, two or more optical fiber and support devices itself can be along the longitudinal axis settings of this structure, in this structure, parameter is sensed.Every optical fiber is bonded to the supporter that optical fiber twines around its spiral repeatedly or continuously.

Selected following example, realized to measure strain sensitivity to use canonical measure equipment.

For example, suppose d=5mm, b=50mm and H=500mm

Then for increasing by 0.05% in Fig. 4-L=500.24mm(length L)

Compare with case 1 for Fig. 9-L=511.05mm(, increase by 2.2% in the length L)

If P=50mm and d=5mm, b=50mm and H=500mm

Then, for Fig. 7, compare with Fig. 4 according to Fig. 4-L=524.09mm(, increase by 4.8% in the length L)

For Fig. 7, compare with Fig. 4 according to figure 0-L=1169.36mm(, increase by 134% in the length L)

If D=200mm and P=50mm, d=5mm, b=50mm and H=500mm

For Fig. 8, compare with Fig. 4 according to Fig. 4-L=841.67mm(then, increase by 68.2% in the length L)

For Fig. 8, compare with Fig. 4 according to Fig. 9-L=1877.9mm(, increase by 276% in the length L)

Wherein, the increase of the % among the L is directly proportional with the strain demagnification of employed concrete grammar/winding technology.

If monitored parameter is temperature, then can on the supporter of per unit length, wrap up fiber more by twining the optical fiber winding more tightly.Should be understood that when doing like this, twine angle with respect to the axis of supporter near 90 °.This makes strain demagnification maximum effect, and has improved the resolution ratio of system.Other parameter can be handled similarly, but when the monitoring strain, can weigh according to surrounding environment (whether strain demagnification, resolution ratio and/or measurement sensitivity are most important for special-purpose), with the spacing of the winding on the selection supporter, and the corresponding optical fiber of the winding quantity of per unit length is with respect to the angle that should change direction.Helical angle is approached perpendicular to changing direction, will make strain on the fiber dwindle and close to zero, improve resolution ratio, but can desensitization.The resolution ratio here is the coverage between the survey mark.Sensitivity is relevant with the precision of measuring at these aspects.

Be some embodiment of the present invention of flexible pipe according to elongated object construction wherein, flexible pipe can have one or more armors.Such armor normally twines and forms in the fabrication stage by twine armoury wire around the basal layer spiral.Should be understood that available its cross section in the embodiments of the invention can be compatible or the optical fiber of the cross section of coupling armoury wire and supporter replace one or more armouring wires and twine.In this case, the spacing of optical fiber and supporter winding is determined by the spacing of selecting in flexible pipe design and manufacture process.

Can be used for making the elastic behavior that the material of the bar of the rectangular shape with radius chamfer shown in Figure 9 can bear and reach the measured maximum strain level of expection in service.Bar material for example can be metal, polymer or composite material etc.Groove is set, so that optical fiber is placed and is fixed in the bar.Use is applicable to that the ready-made adhesive on the surface of bar/element of construction comes bondable fibers.The path of groove is designed to, and makes that be identical along one group of axial stroke of the length of bar in the whole length of groove, thereby provides groove with respect to the fixed-direction of the axis of bar.The strain monitoring bar is can be temporarily attached, for good and all bonding or directly incorporate in the structure of wherein monitoring strain/displacement.

Make bar when tension when be applied to structure owing to load, the strain on the optical fiber (axis of itself and bar is angled) will reduce, and proportional with the strain in the bar.Strain on the fiber and the relation of the strain on the bar are provided by equation:

$\frac{{\mathrm{\ϵ}}_{\mathrm{Fibre}}}{{\mathrm{\ϵ}}_{\mathrm{Rod}}}=\left(\frac{1+v}{2}\right)+\left(\frac{1+v}{2}\right)\mathrm{Cos}2\mathrm{\θwhereTan\θ}=\frac{2(b-d)+\mathrm{\πd}}{P}\mathrm{and}2R=d$

For example, if the thickness of bar b is 25mm, the thickness of bar d is that 5mm and spacing P are 60mm(poisson's ratio V-0.3 in steel pole), then strain decay (going to amplify) is:

$\frac{{\mathrm{\ϵ}}_{\mathrm{Fibre}}}{{\mathrm{\ϵ}}_{\mathrm{Rod}}}\≈0.4(40\%)$ Equation (8)

The minimum value of the radius of curvature R of locating in rectangular shaft radius end depends on the maximum strain that fiber can bear.

The simple form of this respect development is the cylindrical bar (L=0) of trough of belt.Yet the attainable amount of amplifying of going is low, unless shank diameter is big, because optical fiber can only be as photoconductive tube work (reaching certain bend radius), and bend radius reduces, and light can pass fibre wall and loss gradually.The use of rectangular shaft has advantage: under the situation of the diameter that does not increase bar, can increase the length of fiber.

The benefit that the shape of bar has is that strain measurement is for the bend-insensitive of bar, because stretching and compressive strain are being used with the distributed strain sensing system and can offset.Offset curvature effect and be equally applicable to the circle of bar and elongated cross section.Rightly, the average distance of strain measurement equals the length L above the fiber of a helix pitch.Under these circumstances, the axial strength of measuring stick only.Rightly, system can use with the discrete sensing system based on Bragg grating, to reduce the overall strain on the fiber.

Bar can be suitably by the whole bag of tricks manufacturing, such as, machining, extrude processing or have for a plurality of overlapping running roller that forms the groove impression of groove at the preform bar by use.Perhaps, can use the rapid prototyping reproduction technology of printing such as laser centering or 3D to make bar.

Figure 10 illustrates the configuration of hardware/software according to an embodiment of the invention.Single monitoring means that can be by having a plurality of inputs or have when common a plurality of monitoring means of base and monitor one or more sensors.These data are transferred to database, and in described database, data will be stored, and its mode allows to be easy to inquiry.Because data volume, preferably, the detailed data collection of short-term will keep a period of time, for example, 6 months, wherein will comprise the data of all records, then other database will be used for storage can be by compressing the long-term trend data of short-term data generation.Under the situation of accident or fault, use short-term data.

In the claim of whole manual and this manual, word " comprises " and the meaning of " comprising " and their derivative words is, " include but not limited to ", and their purpose is not that (no) got rid of other parts, added part, ingredient, integral body or step.In the claim of whole manual and this manual, odd number is contained plural number, unless context refers else.Particularly, when using indefinite article, manual is understood that to have considered plural number and odd number, unless context refers else.

Feature, integral body, characteristic, compound, chemical part or group in conjunction with particular aspects of the present invention, embodiment or case description should be understood that to be applicable to any other side, embodiment or the example of describing herein, unless incompatible with it.The institute of disclosed in this manual all features (comprising any appending claims, summary and accompanying drawing) and/or disclosed any method or process all can make up by any combination in steps, except wherein at least some such features and/or step are repelled mutually.The present invention is not limited to the details of any previous embodiment.The present invention extends to any new invention or any new combination of disclosed feature in this manual (comprising any appending claims, summary and accompanying drawing), or any new invention of the step of disclosed any method or process or any new combination.

Reader's notice should with this manual simultaneously or all papers and the file before it, submitted to, these papers relevant with this application with file and can check the public by this manual open, and all such papers and file content all by reference mode incorporate this paper into.

Claims (35)

1. device that is used for monitoring at least one parameter relevant with slim-lined construction comprises:

At least one elongated support body member arranges along the vertical structure axis relevant with elongated object construction; With

At least one fiber optic component arranges basically spirally along vertical body element axis relevant with described at least one supporter element.

2. device according to claim 1, wherein, described supporter element arranges basically along described vertical structure axis directly.

3. device according to claim 1, wherein, described supporter element arranges basically spirally along described vertical structure axis.

4. according to each described device in the claim 1 to 3, further comprise:

Each fiber optic component repeatedly or continuously is bonded to described at least one body element.

5. according to each described device in the claim 1 to 4, further comprise:

Each fiber optic component is arranged around the external surface of described at least one body element.

6. according to each described device in the claim 1 to 4, further comprise:

Each fiber optic component is arranged in the groove zone that the external surface of described at least one body element extends basically spirally.

7. according to each described device in the aforementioned claim, further comprise:

Described at least one body element and described at least one fibre element are arranged to, and make described object construction stand the strain around radius R, and described strain surpasses the specified breaking strain relevant with described fibre element.

8. according to each described device in the aforementioned claim, further comprise:

Described at least one body element has enough little diameter, so that the described fibre element of a circle has minimum value, thereby satisfies the length of distinguishing of the sensing system be connected to described fibre element.

9. according to each described device in the aforementioned claim, further comprise:

Described fibre element is closely arranged near described body element.

10. according to each described device in the aforementioned claim, wherein, described body element is flexible.

11. according to each described device in the aforementioned claim, further comprise:

Described at least one fibre element is arranged to, the feasible minimum bending radius that is no more than described fiber, and the fiber border is no more than the critical angle of described fibre element.

12. according to each described device in the aforementioned claim, further comprise:

The setting of the spiral basically of described at least one fibre element is followed along the substantially the same axial stroke of the entire length of described body element.

13. according to each described device in the aforementioned claim, further comprise:

Described at least one body element comprises the bar member with constant cross-section, and the shape of described cross section is to have the rectangle of fillet or avette circular or oval.

14. device according to claim 13, wherein, described bar member be metal or condensate or composite material.

15. according to claim 13 or 14 described devices, further comprise:

The interim attached or permanent adhesive of described bar member or directly be incorporated into described object construction.

16. according to each described device in the aforementioned claim, further comprise:

Sensing system can be connected at least one end of described fiber optic component.

17. according to each described device in the aforementioned claim, wherein, described at least one parameter comprises strain or temperature.

18. according to each described device in the aforementioned claim, wherein, described object construction comprises a part of one in bridge or road surface or lamppost or wind turbine blade or yacht mast or suspension feed cable or the aircraft fuselage sheet.

19. according to each described device in the claim 1 to 15, further comprise:

Described elongated object construction comprises flexible pipe body, and described flexible pipe body comprises that fluid keeps layer and at least one armor.

20. device according to claim 19 further comprises:

Described at least one body element comprises substrate component, and described substrate component twines with the spacing of mating the winding spacing in the described armor, and described fibre element is arranged basically spirally around the external surface of described substrate component.

21. device according to claim 19 further comprises:

Described at least one body element comprises hollow body member, and described hollow body member is twined with the spacing of mating the winding spacing in the described armor, and described fibre element is arranged basically spirally around the inner surface of described hollow body member.

22. according to each described device in the claim 19 to 21, further comprise:

First end accessory and the second end accessory, stop first end and second end of described flexible pipe body respectively, described at least one fibre element is at least between described first end accessory and described the second end accessory, or between the part of the described body between described first end accessory and the described the second end accessory, or along between the intermediate point of described flexible pipe body and one of described first end accessory and described the second end accessory and extend.

23. according to each described device in the claim 19 to 22, further comprise:

Described flexible pipe body comprises the body of flexible pipe, and described body comprises standpipe or flowline or wire jumper.

24. the method for at least one parameter that a monitoring is relevant with slim-lined construction may further comprise the steps:

Provide along at least one elongated support body member of the vertical structure axis relevant with elongated object construction, described at least one elongated support body member comprises at least one fiber optic component that arranges spirally basically along vertical body element axis relevant with described body element; And

Monitor at least one feature relevant with described fibre element, the parameter that described character representation is relevant with described slim-lined construction via sensing system.

25. method according to claim 24 further comprises:

Provide described body element to comprise, described body element is placed basically along described structure axis directly.

26. method according to claim 24 further comprises:

Provide described body element to comprise, twine described body element spirally along described structure axis.

27. a method of making flexible pipe body comprises:

Provide fluid to keep layer;

At least one armor is provided; And

Provide along at least one elongated support body member of the vertical body axis relevant with described body, described at least one elongated support body member comprises at least one fiber optic component of arranging spirally basically along vertical body element axis relevant with described body element.

28. method according to claim 27 further comprises:

By described supporter element is twined the winding that becomes described armor spirally, and provide described supporter element.

29. a device that is used for monitoring at least one parameter relevant with slim-lined construction comprises:

At least one fiber optic component, along arranging spirally basically that with vertical body element axis of elongated support body member described body element is the structure axis arranged longitudinally, wherein,

Separate and be wrapped in correlation length described first plane and described second plane between greater than described fiber optic component with preset space length perpendicular to the length of first plane of described vertical structure axis and the fibre element between second plane along described vertical structure axis.

30. device according to claim 29, wherein, described preset space length comprises along the helix pitch of the described fibre element of described body element layout.

31. device according to claim 29, wherein, the possible maximum spacing of described preset space length is enough little, makes the described fibre element of a circle have minimum value, thereby satisfies the length of distinguishing of the sensing system be connected to described fibre element.

32. device according to claim 29, wherein, described preset space length is to keep the bend radius of described fibre element to be equal to or less than the spacing that minimum bending radius and fiber border are equal to or less than the critical angle of described fibre element.

33. device according to claim 29, wherein, described slim-lined construction comprises flexible pipe, and described flexible pipe comprises armor, and described armor comprises that the armoury wire that spiral twines twines, and described preset space length comprises the winding spacing that described line twines.

34. a device is constructed and is arranged as described with reference to drawings basically.

35. a method is basically as described with reference to the accompanying drawings.

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