CN106500613B - A kind of apparatus and system for the blade deformation monitoring wind power plant - Google Patents
A kind of apparatus and system for the blade deformation monitoring wind power plant Download PDFInfo
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- CN106500613B CN106500613B CN201610902577.0A CN201610902577A CN106500613B CN 106500613 B CN106500613 B CN 106500613B CN 201610902577 A CN201610902577 A CN 201610902577A CN 106500613 B CN106500613 B CN 106500613B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
Abstract
The invention discloses a kind of devices of blade deformation for monitoring wind power plant, including laser emitter, are arranged in the nearly wheel hub in root on leaflet inner faces, and are suitable for axial to blade tip transmitting laser along blade；Optical screen is arranged in measurement point on leaflet inner faces, intersects vertically with the laser of laser transmitter projects, suitable for blocking laser so that it forms luminous point on optical screen, is further adapted for axially deflecting with the deformation of blade along blade；Camera is arranged on leaflet inner faces away from optical screen preset distance, does not block laser, forms the optical screen image of luminous point on optical screen suitable for absorbing laser；And signal processing apparatus, the optical screen image suitable for being absorbed according to camera calculate the deformation of measurement point blade.Invention additionally discloses the systems and blade of a kind of blade deformation for monitoring wind power plant.
Description
Technical field
The present invention relates to blade state monitoring field more particularly to a kind of dresses for the blade deformation for monitoring wind power plant
It sets and system.
Background technique
Wind-power electricity generation is received significant attention as a kind of important renewable new energy.And the blade of wind power plant
As the key position for capturing wind energy in wind power generating set, health status directly influences the operation of entire wind power system.
The structure and stress of blade are considerably complicated, since the working environment of blade is very severe, spring, summer, autumn and winter, scorching summer and freezing winter, thunder and lightning, ice
Hail, sleet, sand and dust etc. be likely at any time to fan blade generate damage, therefore blade become wind power plant in be easiest to
The position of appearance accident.According to statistics, the accident that blade injury generates accounts for about the one third of the total accident of blower.Common fan blade
It will appear the typical fatigue failure such as crackle, layering, gap and unsticking after being damaged, these damage the fortune with blade
It goes and constantly accumulates and eventually result in leaf destruction.Fatigue failure is generated to during fracture in blade, and blade is at runtime
Strain or deformation in various degree can occur for each section.Necessary shutdown maintenance when damage accident occurs for usual blade, once while leaf
Piece fractures, then probably damages tower, this will lead to the maintenance cost of great number, and very big economic damage is also brought to wind power plant
It loses.Therefore, if the health status of blade can be monitored effectively, machine halt trouble caused by fan blade can must be effectively reduced, is avoided
Generate great economic loss.
Currently, the blade of wind power plant, which strains common monitoring means, foil gauge stress monitoring method and fiber grating
Monitoring method etc..These monitoring methods suffer from its applicable defect type and advantage and disadvantage, and technical requirements are harsher, monitor
Journey is influenced by running environment, weather conditions and other factors, and usually require by complicated detecting instrument equipment and
The intervention of the analysis personnel of profession can just do result judgement, significantly increase monitoring cost and universal degree of difficulty.
Therefore a kind of scheme of the blade deformation of novel monitoring wind power plant is needed.
Summary of the invention
In consideration of it, the present invention provides a kind of schemes of the blade deformation of new monitoring wind power plant, to try hard to solve
Certainly or at least alleviate above there are the problem of.
According to an aspect of the invention, there is provided a kind of device for the blade deformation for monitoring wind power plant, comprising:
Laser emitter is arranged in the nearly wheel hub in root on leaflet inner faces, and is suitable for axial to blade tip transmitting laser along blade；Light
Screen, is arranged in measurement point on leaflet inner faces, shape is rectangle, and is intersected vertically with the laser of laser transmitter projects, light
Screen is suitable for blocking laser so that it forms luminous point on optical screen, is further adapted for axially deflecting with the deformation of blade along blade；It takes the photograph
As head, it is arranged on leaflet inner faces away from laser at optical screen preset distance, is not blocked, camera is suitable for intake laser in optical screen
The upper optical screen image for forming luminous point；And signal processing apparatus, the optical screen image suitable for being absorbed according to camera calculate measurement point
Locate the deformation of blade.
Optionally, in a device in accordance with the invention, position and blade of the optical screen image recording current spot on optical screen
Position of the initial light spot on optical screen when deformation occurs, the deformation of blade are expressed as blade deformation quantity and blade deflection angle, letter
Number processing unit is suitable for calculating the coordinate of current spot and initial light spot under the first coordinate system, the first coordinate system according to optical screen image
Using the adjacent both sides of optical screen as transverse and longitudinal axis；It is further adapted for the current spot coordinate, initial light spot coordinate, measurement point blade according to calculating
Deformation quantity and current spot coordinate, the relationship of initial light spot coordinate and blade deflection angle and measurement point amount of deflection and blade are inclined
The relationship of corner calculates the measurement point blade deformation quantity and blade deflection angle.
Optionally, in a device in accordance with the invention, signal processing apparatus is suitable for calculating current spot according to optical screen image
With coordinate of the initial light spot under the second coordinate system, current spot and initial light spot are obtained in the first coordinate system by coordinate transform
Under coordinate, the second coordinate system is deformed to obtain by the first coordinate system, and is with the adjacent both sides of optical screen represented by optical screen image
Transverse and longitudinal axis.
Optionally, in a device in accordance with the invention, signal processing apparatus is further adapted for judging blade deformation quantity, deformation quantity
Whether differential value and the differential value at blade deflection angle, deflection angle are more than threshold value, if any is more than threshold value, are sounded an alarm.
Optionally, in a device in accordance with the invention, signal processing apparatus is further adapted for supplying to laser emitter and camera
Electricity.
Optionally, in a device in accordance with the invention, the frame number of camera is 20fps.
Optionally, in a device in accordance with the invention, measurement point and laser emitter are at a distance of 1/3 length of blade.
Optionally, in a device in accordance with the invention, further includes: it is arranged in another measurement point on leaflet inner faces, to
Optical screen another side, another laser emitter for axially emitting laser along blade, optical screen another side and another laser transmitter projects
Laser intersect vertically, and be suitable for block the laser so that it forms luminous point on optical screen another side；It is arranged in leaflet inner faces
Above, away from another camera at optical screen another side preset distance, lens plane is vertical with leaflet inner faces, does not block another
The laser of laser transmitter projects goes back camera and is suitable for absorbing the laser of another laser transmitter projects shape on optical screen another side
At the optical screen image of luminous point；And the optical screen image calculating that signal processing apparatus is further adapted for being absorbed according to another camera is described another
The deformation of one measurement point blade.
According to another aspect of the present invention, a kind of system of blade deformation for monitoring wind power plant, packet are provided
Include the device of the blade deformation of at least one monitoring wind power plant according to the present invention.
According to the present invention there are one aspects, provide a kind of blade of wind power plant, including according to the present invention
Monitoring wind power plant blade deformation system.
The scheme of the blade deformation of monitoring wind power plant according to the present invention, by the nearly wheel hub cloth of root of blade
It sets laser emitter, arrange the optical screen of the corresponding laser for blocking laser transmitter projects in measurement point, then taken the photograph by camera
It takes laser to fall on optical screen the optical screen image for forming luminous point, is realized according to luminous point changes in coordinates on optical screen image to blade deformation
Detection, thus can quickly and effectively and in real time reflect the damage status of blade, while significantly reducing the cost of monitoring.
Further, by the way that laser emitter is equally arranged in optical screen another side, the extension of monitoring range is realized.
Detailed description of the invention
To the accomplishment of the foregoing and related purposes, certain illustrative sides are described herein in conjunction with following description and drawings
Face, these aspects indicate the various modes that can practice principles disclosed herein, and all aspects and its equivalent aspect
It is intended to fall in the range of theme claimed.Read following detailed description in conjunction with the accompanying drawings, the disclosure it is above-mentioned
And other purposes, feature and advantage will be apparent.Throughout the disclosure, identical appended drawing reference generally refers to identical
Component or element.
Fig. 1 shows the system of the blade deformation of monitoring wind power plant according to an illustrative embodiment of the invention
100 structural schematic diagram；
Fig. 2 shows the devices of the blade deformation of monitoring wind power plant according to an illustrative embodiment of the invention
200 structural schematic diagram；
Fig. 3 shows the blade deformation for being disposed with monitoring wind power plant according to an illustrative embodiment of the invention
Device 200 blade the schematic diagram of the section structure；
Fig. 4 shows the undeformed schematic diagram of blade according to an illustrative embodiment of the invention；
Fig. 5 shows the schematic diagram that deformation occurs of blade according to an illustrative embodiment of the invention；
Fig. 6 shows horizontal axis side under the first coordinate system that deformation occurs of blade according to an illustrative embodiment of the invention
To geometrical model schematic diagram；
Fig. 7 shows blade according to an illustrative embodiment of the invention deformation occurs the longitudinal axis side under the first coordinate system
To geometrical model schematic diagram；
Fig. 8 shows the schematic diagram of the optical screen 220 for establishing the first coordinate system according to an illustrative embodiment of the invention；
Fig. 9 is shown represented by the optical screen image for establishing the second coordinate system according to an illustrative embodiment of the invention
The schematic diagram of optical screen 220；And
Figure 10 shows the blade deformation of the monitoring wind power plant of another exemplary embodiment according to the present invention
The structural schematic diagram of device 200.
Specific embodiment
Exemplary embodiments of the present disclosure are described in more detail below with reference to accompanying drawings.Although showing the disclosure in attached drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here
It is limited.On the contrary, these embodiments are provided to facilitate a more thoroughly understanding of the present invention, and can be by the scope of the present disclosure
It is fully disclosed to those skilled in the art.
Blade directly influences entire wind-powered electricity generation as the key position for capturing wind energy in wind power generating set, health status
The operation of system.The blade of wind power plant is generally very long, and in operation process, each position can all occur under the action of the wind
Different degrees of deformation.And with the growth of blade runing time, the fatigue damage of blade can gradually increase, these fatigues
Accumulation can reduce blade reliability of operation, serious, will lead to blower failure.Therefore, the deformation of blade at runtime
Size can effectively reflect the health status of blade entirety.
Fig. 1 shows the system of the blade deformation of monitoring wind power plant according to an illustrative embodiment of the invention
100 structural schematic diagram.As shown in Figure 1, the system 100 of the blade deformation of monitoring wind power plant includes at least one monitoring
The device 200 of the blade deformation of wind power plant.
Fig. 2 shows the devices of the blade deformation of monitoring wind power plant according to an illustrative embodiment of the invention
200 structural schematic diagram.As shown in Fig. 2, the device 200 of the blade deformation of monitoring wind power plant may include Laser emission
Device 210, optical screen 220, camera 230 and signal processing apparatus 240.
Laser emitter 210 is arranged in the nearly wheel hub in root on leaflet inner faces, and axial along blade, sharp to blade tip transmitting
Light.Laser emitter 210 is usually fixed by support frame, and support frame can be single foot, both feet or multiway structure.The support
Leaflet inner faces are fixed on by structure glue or other fixed forms in frame bottom, and support frame and laser emitter 210 pass through can
It adjusts fixing clamp to be connected and fixed, which can be adjusted after fixed laser transmitter 210 by bolt or other modes
The height of laser emitter 210 and direction.
In one embodiment, the cable of laser emitter 210 is connected by the cover board hole and signal processing apparatus 240 of blade
It connects, powers from the signal processing apparatus 240 to laser emitter 210.In another embodiment, laser emitter 210 may be used also
By lithium battery power supply.
Correspondingly, the measurement point arrangement and Laser emission on laser emitter 210 to blade tip direction, leaflet inner faces
The corresponding optical screen 220 in 210 position of device, the laser which emits perpendicular to laser emitter 210, shape is usually square
Shape, size can according to practical blade the measurement point space allocation.Optical screen 220 can block the laser emitter
The laser of 210 transmittings forms luminous point on optical screen 220 so as to laser.Here, measurement point is usually the blade position that easily deformation occurs
It sets, such as on leaflet inner faces and at laser emitter 210 apart 1/3 length of blade.
Optical screen 220 can be fixed by the bracket in leaflet inner faces, which passes through structure glue or other fixed forms
It is fixed with blade, and the height of adjustable optical screen 220.
When Fig. 4 and Fig. 5 respectively illustrates blade undeformed normal operation and status diagram of blade when deformation occurs.
It is apparent that optical screen 220 axially deflects with the deformation of blade along blade when deformation occurs for blade.It is to be appreciated that light
Screen 220 deflects, but laser is still along straightline propagation, such laser be incident upon the luminous point on optical screen 220 can with blade deformation and
Variation, therefore the on-line monitoring to blade deformation can be just realized according to variation of the luminous point on optical screen, it is easy and intuitive.
The present invention can obtain variation of the luminous point on optical screen by arrangement camera 230.Camera 230 is arranged in leaf
On plate inner surface away from 220 preset distance of optical screen at, while will not block laser emitter 210 transmitting laser, can take in sharp
Light forms the optical screen image of luminous point on optical screen.The specific azimuth-range that wherein present invention arranges camera 230 does not limit
System, the panorama that can take optical screen 220 all belongs to the scope of protection of the present invention, such as can be arranged in optical screen 220
In front of front, side etc..
In one embodiment, the arrangement of laser emitter 210, optical screen 220 and camera 230 on leaflet inner faces
It can be as shown in Figure 3.Further, camera 230 can also be integrated with optical screen 220, rather than discrete arrangement, the present invention
With no restriction to this.
Camera 230 can fix by bracket in leaflet inner faces, and adjustable bracket adjusts bowing for camera 230
The elevation angle shoots the panorama of optical screen 220 convenient for camera 230, wherein image a need in the length or wide direction of head plane
It is parallel with the corresponding length of optical screen 220 or wide direction.Here the frame number of camera 230 is usually arranged as 20fps.
After camera 230 absorbs optical screen image, image transmitting to signal processing apparatus 240 can be handled.Signal
Processing unit 240 can calculate the deformation of above-mentioned measurement point blade according to the optical screen image that camera 230 absorbs.Signal processing
Device 240 is typically secured on blade wheel hub internal control cabinet.
In one embodiment, the end of camera 230 is connected with cable, which is passed through by blade inner wall cabling
Bucket cover plate hole is connect with signal processing apparatus 240.Signal processing apparatus 240 is powered to camera 230 at this time, and passes through cable
Receive the image that camera 230 transmits.In another embodiment, camera 230 can also be by lithium battery power supply, signal at this time
Processing unit 240 passes through wireless network and 230 connecting communication of camera.In initial placement, inferior lobe can be recorded on optical screen
Later observations are convenient in position of the initial light spot on optical screen when piece undeformed.The position can specifically be sent out by adjusting laser
Emitter 210 and 220 position of optical screen adjust.
Naturally, camera 230 absorb optical screen image then simultaneously record have position of the current spot on optical screen 220 and
The blade position of initial light spot on optical screen 220 when deformation occurs.Signal processing apparatus 240 can be according to the optical screen image meter
The coordinate of current spot and initial light spot under the first coordinate system is calculated, the first coordinate system here is with the adjacent both sides of optical screen 220
Transverse and longitudinal axis is established.
And the difference in orientation, light represented by the optical screen image of intake are arranged in the deformation and camera 230 due to blade
Screen may be deformed due to the variation of shooting angle, such as irregular four side of adjacent both sides out of plumb is deformed by rectangle
Shape.Signal processing apparatus 240 can calculate the seat of current spot and initial light spot under the second coordinate system according to the optical screen image
Mark, the second coordinate system is from the deformation of the first coordinate system here, i.e., using the adjacent both sides of optical screen represented by optical screen image as transverse and longitudinal
Axis is established.Then signal processing apparatus 240 can obtain current spot and initial light spot in above-mentioned first seat by coordinate transform
Coordinate under mark system.
It is to be appreciated that blade deformation can be showed with blade deformation quantity and blade deflection angle.Obtain current spot and
After the coordinate under the first coordinate system, signal processing apparatus 230 can be sat initial light spot according to current spot coordinate, initial light spot
The relationship and measurement point of mark, measurement point blade deformation quantity and current spot coordinate, initial light spot coordinate and blade deflection angle
The relationship for locating amount of deflection and blade deflection angle calculates measurement point blade deformation quantity and blade deflection angle.It is illustrated below to signal processing
Device 240 is specifically described according to the process that optical screen image calculates blade deformation.
Fig. 6 shows horizontal axis under the first coordinate system that deformation occurs of blade according to an illustrative embodiment of the invention
Geometrical model schematic diagram.As shown in fig. 6, luminous point falls in C on optical screen 220 when deformation occurs (being represented by dotted lines) for blade0Point
Place.When deformation occurs for blade, luminous point is fallen on optical screen 220 at C point.Wherein, d is optical screen 220 (i.e. measurement point) and laser is sent out
The distance of emitter 210, x0For C0Point abscissa, x are C point abscissa, and Δ x is the blade deformation quantity of X direction, and α is horizontal axis side
To blade deviation angle.
Fig. 7 shows blade according to an illustrative embodiment of the invention, and deformation occurs in the first coordinate system y direction
Geometrical model schematic diagram, it is possible to understand that ground, it is identical as modular concept shown in Fig. 5.Wherein, when deformation occurs (with void for blade
Line indicates) when, luminous point falls in C on optical screen 2200At point.When deformation occurs for blade, luminous point is fallen on optical screen 220 at C point.Its
In, y0For C0Point ordinate, y are C point ordinate, and Δ y is the blade deformation quantity of y direction, and β is that the blade of y direction deviates
Angle.
Assuming that optical screen 220 is rectangle, actual optical screen is as shown in figure 8, using optical screen lower-left intersection point as origin at this time, adjacent two
Side is that transverse and longitudinal axis establishes the first coordinate system, and horizontal axis is X-axis, and the longitudinal axis is Y-axis.A point is initial light spot, 220 y direction of optical screen
Two edge lengths are b, and coordinate of the A point under first coordinate system is (x0,y0).B point is current spot, 220 X direction of optical screen
Two edge lengths are a, and coordinate of the B point under first coordinate system is (x, y).
And optical screen represented by the optical screen image that camera 230 absorbs at this time is as shown in figure 9, rectangle is deformed into adjacent side not
Vertical irregular quadrilateral, the first coordinate system are deformed into the second coordinate system, and second coordinate system is with an irregular quadrilateral left side
Lower intersection point is origin, and two adjacent sides are the foundation of transverse and longitudinal axis, horizontal axis X ' axis, longitudinal axis Y ' axis.A point is initial light spot, l1And l2Respectively
The distance on the both sides for A point away from 220 y direction of optical screen, p1It is A point along the distance of y direction to horizontal axis, 220 horizontal axis of optical screen
Two edge lengths in direction are a', and two edge lengths of 220 y direction of optical screen are b', and coordinate of the A point under second coordinate system is
(x0',y0').B point is current spot, m1And m2The distance on both sides of the respectively B point away from 220 y direction of optical screen, q1For B point edge
For y direction to the distance of horizontal axis, coordinate of the B point under second coordinate system is (x', y').Wherein, a', b', m1, m2, l1,
l2, p1And q1Image procossing can be carried out by aiming screen image by signal processing apparatus 240 to obtain.It can to sum up calculate
Out under the second coordinate system initial light spot and current spot abscissa and ordinate:
It then needs optical screen represented by optical screen image being transformed to actual optical screen, i.e., the second coordinate system is converted to
One coordinate system specifically can pass through coordinate transformIt is calculated:
Observe the deformation quantity of Fig. 6 and the available measurement point blade of geometrical model shown in Fig. 7 are as follows:
Δ x=xcos α-x0, Δ y=ycos β-y0
The deformation of blade at this time is reduced to cantilever beam by distributed load model, the amount of deflection and leaf of available measurement point
Relationship between piece deviation angle are as follows:
Finally combine two equations that can solve the blade-shaped variable Δ x and blade deviation angle of X direction of measurement point
α, the blade-shaped variable Δ y and blade deviation angle β of y direction.Wherein work as α, when β is smaller, can also be approximately considered: Δ x=x-
x0, Δ y=y-y0。
After obtaining blade deformation quantity and blade deviation angle, signal processing apparatus 240 can also judge blade deformation quantity,
Whether the differential value of the differential value of deformation quantity, deviation angle and deviation angle is more than threshold value, if any is more than threshold value, is sounded an alarm.
Wherein, the normal variation range of the deformation quantity that blade occurs at runtime and deviation angle can be measured according to experiment, and according to this
Normal variation range is arranged the threshold value of blade deformation quantity and deviation angle.Once blade is abnormal deformation or fracture, and above-mentioned
When one numerical value is more than threshold value, system can sound an alarm automatically, notify staff's unit exception.
In addition, as shown in Figure 10, device 200 can also include: to be arranged in order to increase the monitoring range to blade deformation
Another measurement point on leaflet inner faces axially emits another laser emitter of laser to 220 another side of optical screen, along blade
250, the laser that 220 another side of optical screen emits with another laser emitter 250 intersects vertically, and can block the laser so as to it
Luminous point is formed on 220 another side of optical screen.Wherein, another measurement point is usually at 1/3 length of blade of optical screen.
Device 200 can also include: to be arranged on leaflet inner faces, away from another at 220 another side preset distance of optical screen
Camera 260 does not block the laser that another laser emitter 250 emits, and the camera 260 is identical as camera 230, can be with
Absorb the optical screen image that the laser that another laser emitter 250 emits forms luminous point on 220 another side of optical screen.
Correspondingly, the optical screen image that signal processing apparatus 240 can also then be absorbed according to another camera 260 calculates another
The deformation of measurement point blade, specific Computing Principle is identical as the calculating of optical screen image absorbed to camera 230, herein no longer
It repeats.
In conclusion wind power plant is generally located at wind resource field abundant, Service Environment is severe, loaded complexity, zero
The maintenance of part and monitoring cost are higher.And blade is as component important in wind power plant, the direct shadow of reliability
Ring the normal operation for arriving wind power plant.Many great blower accidents all originate from leaf destruction, if can be to blade fragment
It splits progress effective monitoring and will be avoided that and accident occurs, be significantly reduced loss.The present invention mainly pass through arrangement laser emitter and
Optical screen can intuitively, effectively monitor blade deformation, to achieve the purpose that blade health monitoring.Meanwhile the present invention
System it is simple, stablize, be reliable, install convenient significantly reduces the strain on-line monitoring cost of blade.
In the instructions provided here, numerous specific details are set forth.It is to be appreciated, however, that implementation of the invention
Example can be practiced without these specific details.In some instances, well known method, knot is not been shown in detail
Structure and technology, so as not to obscure the understanding of this specification.
Similarly, it should be understood that in order to simplify the disclosure and help to understand one or more of the various inventive aspects,
Above in the description of exemplary embodiment of the present invention, each feature of the invention is grouped together into single implementation sometimes
In example, figure or descriptions thereof.However, the disclosed method should not be interpreted as reflecting the following intention: i.e. required to protect
Shield the present invention claims than feature more features expressly recited in each claim.More precisely, as following
As claims reflect, inventive aspect is all features less than single embodiment disclosed above.Therefore, it abides by
Thus the claims for following specific embodiment are expressly incorporated in the specific embodiment, wherein each claim itself
As a separate embodiment of the present invention.
Those skilled in the art should understand that the module of the equipment in example disclosed herein or unit or groups
Part can be arranged in equipment as depicted in this embodiment, or alternatively can be positioned at and the equipment in the example
In different one or more equipment.Module in aforementioned exemplary can be combined into a module or furthermore be segmented into multiple
Submodule.
Those skilled in the art will understand that can be carried out adaptively to the module in the equipment in embodiment
Change and they are arranged in one or more devices different from this embodiment.It can be the module or list in embodiment
Member or component are combined into a module or unit or component, and furthermore they can be divided into multiple submodule or subelement or
Sub-component.Other than such feature and/or at least some of process or unit exclude each other, it can use any
Combination is to all features disclosed in this specification (including adjoint claim, abstract and attached drawing) and so disclosed
All process or units of what method or apparatus are combined.Unless expressly stated otherwise, this specification is (including adjoint power
Benefit require, abstract and attached drawing) disclosed in each feature can carry out generation with an alternative feature that provides the same, equivalent, or similar purpose
It replaces.
In addition, it will be appreciated by those of skill in the art that although some embodiments described herein include other embodiments
In included certain features rather than other feature, but the combination of the feature of different embodiments mean it is of the invention
Within the scope of and form different embodiments.For example, in the following claims, embodiment claimed is appointed
Meaning one of can in any combination mode come using.
In addition, be described as herein can be by the processor of computer system or by executing by some in the embodiment
The combination of method or method element that other devices of the function are implemented.Therefore, have for implementing the method or method
The processor of the necessary instruction of element forms the device for implementing this method or method element.In addition, Installation practice
Element described in this is the example of following device: the device be used for implement as in order to implement the purpose of the invention element performed by
Function.
As used in this, unless specifically stated, come using ordinal number " first ", " second ", " third " etc.
Description plain objects, which are merely representative of, is related to the different instances of similar object, and is not intended to imply that the object being described in this way must
Must have the time it is upper, spatially, sequence aspect or given sequence in any other manner.
Although the embodiment according to limited quantity describes the present invention, above description, the art are benefited from
It is interior it is clear for the skilled person that in the scope of the present invention thus described, it can be envisaged that other embodiments.Additionally, it should be noted that
Language used in this specification primarily to readable and introduction purpose and select, rather than in order to explain or limit
Determine subject of the present invention and selects.Therefore, without departing from the scope and spirit of the appended claims, for this
Many modifications and changes are obvious for the those of ordinary skill of technical field.For the scope of the present invention, to this
Invent done disclosure be it is illustrative and not restrictive, it is intended that the scope of the present invention be defined by the claims appended hereto.
Claims (7)
1. a kind of device for the blade deformation for monitoring wind power plant, comprising:
Laser emitter is arranged in the nearly wheel hub in root on leaflet inner faces, and is suitable for axial to blade tip transmitting laser along blade；
Optical screen is arranged in measurement point on leaflet inner faces, and shape is rectangle, and hangs down with the laser of the laser transmitter projects
Straight intersection, the optical screen are suitable for blocking the laser so that it forms luminous point on the optical screen, are further adapted for the deformation with blade
It axially deflects along blade；
Camera is arranged on leaflet inner faces away from the optical screen preset distance, does not block the laser, the camera
The optical screen image of luminous point is formed on optical screen suitable for absorbing laser；And
Signal processing apparatus, the optical screen image suitable for being absorbed according to camera calculate the deformation of the measurement point blade；Wherein,
Optical screen image recording current spot on optical screen position and blade deformation occurs when position of the initial light spot on optical screen
It sets, the deformation of blade is expressed as blade deformation quantity and blade deflection angle, and the signal processing apparatus is suitable for according to optical screen image meter
The coordinate of current spot and initial light spot under the first coordinate system is calculated, first coordinate system is using the adjacent both sides of the optical screen as transverse and longitudinal
Axis；It is further adapted for being sat according to the current spot coordinate of calculating, initial light spot coordinate, measurement point blade deformation quantity and current spot
Described in the relationship of mark, the relationship and measurement point amount of deflection of initial light spot coordinate and blade deflection angle and blade deflection angle calculates
Measurement point blade deformation quantity and blade deflection angle.
2. device as described in claim 1, wherein the signal processing apparatus is suitable for being calculated according to the optical screen image current
The coordinate of luminous point and initial light spot under the second coordinate system obtains current spot and initial light spot by coordinate transform and sits first
Coordinate under mark system, second coordinate system are deformed to obtain by the first coordinate system, and with optical screen represented by the optical screen image
Adjacent both sides be transverse and longitudinal axis.
3. device as claimed in claim 2, wherein the signal processing apparatus is further adapted for judging the blade deformation quantity, shape
Whether the differential value of variable and the differential value at blade deflection angle, deflection angle are more than threshold value, if any is more than threshold value, are issued
Alarm.
4. device as described in claim 1, wherein the signal processing apparatus is further adapted for the laser emitter and camera shooting
Head power supply.
5. device as described in claim 1, wherein the frame number of camera is 20fps.
6. device according to any one of claims 1 to 5, wherein the measurement point and the laser emitter are at a distance of 1/3
Length of blade.
7. device as claimed in claim 4, wherein further include:
It is arranged in another measurement point on leaflet inner faces, axially emits the another of laser to the optical screen another side, along blade
The laser of laser emitter, the optical screen another side and another laser transmitter projects intersects vertically, and is suitable for blocking the laser
So that it forms luminous point on the optical screen another side；
It is arranged on leaflet inner faces, away from another camera at preset distance described in the optical screen another side, lens plane
It is vertical with leaflet inner faces, the laser of another laser transmitter projects is not blocked, the camera is suitable for absorbing another laser
The laser of transmitter transmitting forms the optical screen image of luminous point on optical screen another side；And
The signal processing apparatus is further adapted for calculating another measurement point leaf according to the optical screen image that another camera absorbs
The deformation of piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610902577.0A CN106500613B (en) | 2016-10-17 | 2016-10-17 | A kind of apparatus and system for the blade deformation monitoring wind power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610902577.0A CN106500613B (en) | 2016-10-17 | 2016-10-17 | A kind of apparatus and system for the blade deformation monitoring wind power plant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106500613A CN106500613A (en) | 2017-03-15 |
| CN106500613B true CN106500613B (en) | 2018-12-18 |
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| PL237198B1 (en) * | 2017-10-19 | 2021-03-22 | Politechnika Rzeszowska Im Ignacego Lukasiewicza | Method for determination of geometric parameters of damages in the aircraft engine compressor vanes |
| CN111120220B (en) * | 2018-10-31 | 2021-05-28 | 北京金风科创风电设备有限公司 | Method and system for video monitoring of wind generating set blade |
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| CN111121658B (en) * | 2019-12-31 | 2021-04-20 | 沈阳航空航天大学 | Blade deformation measuring method under wind turbine aerodynamic performance experiment |
| CN112283047B (en) * | 2020-09-10 | 2022-07-12 | 中车株洲电力机车研究所有限公司 | Load monitoring method and system based on wind turbine clearance monitoring |
| CN115342746B (en) * | 2022-10-19 | 2022-12-23 | 河北钢铁集团沙河中关铁矿有限公司 | Underground mine support deformation monitoring device and method |
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