CN109854460A - Fan blade detection method and device - Google Patents

Fan blade detection method and device Download PDF

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Publication number
CN109854460A
CN109854460A CN201910241186.2A CN201910241186A CN109854460A CN 109854460 A CN109854460 A CN 109854460A CN 201910241186 A CN201910241186 A CN 201910241186A CN 109854460 A CN109854460 A CN 109854460A
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CN
China
Prior art keywords
blade
fan blade
cavity
air pressure
detection
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Pending
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CN201910241186.2A
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Chinese (zh)
Inventor
米建军
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米建军
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Priority to CN201910241186.2A priority Critical patent/CN109854460A/en
Publication of CN109854460A publication Critical patent/CN109854460A/en
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/70Wind energy
    • Y02E10/72Wind turbines with rotation axis in wind direction
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/70Wind energy
    • Y02E10/74Wind turbines with rotation axis perpendicular to the wind direction

Abstract

The object of the invention is that providing fan blade detection method and device, there is closed cavity in inside fan blade, the air pressure of cavity inside is set to be higher or lower than the air pressure in the blade external world, blade state is detected by detecting the atmospheric pressure value inside closed blade cavity, if the atmospheric pressure value of cavity inside is higher or lower than comparison value, blade has damaged leakage, Preferable scheme is that closed cavity air pressure inside is greater than blade ambient pressure in fan blade, fan blade has closed cavity, air pressure sensing device and temperature sensing device are set in fan blade, air pressure and temperature in detection blower fan blade closed cavity, if power supply, controller and signal emission module, air pressure sensing device and temperature sensing device are connect with controller, controller is connect with signal emission module, controller connects to power supply, ground sets signal receiving module.

Description

Fan blade detection method and device
Technical field
The present invention relates to field of new energy utilization, specifically the fan blade detection method and device of wind-power electricity generation.
Background technique
Wind-power electricity generation does not need fuel, economic and environment-friendly, is widely used in all over the world, in order to mitigate blower weight, improves Blade strength, improves fan efficiency, and current fan blade generally uses various composite high-strength materials, is manufactured into hollow knot Structure, for some length up to tens meters, fan blade needs to be chronically exposed to the work of field rugged environment, and meets in use It will appear to fitful wind and high wind and tremble, be subjected to alternating load, generate torsional deformation, a blade breakage occurs and is broken, meeting Make entire blower disequilibrium, even results in entire blower and collapse and scrap, seriously affect the normal use of blower, cause huge damage It loses, existing technology has through detection blade vibration wave frequency rate, there is the sensing line laid in blade and can detect tension or pressure, There is the methods of laser detection blade bending deformation, is detected from mechanics and optics aspect method, signal identification difficulty is big, is difficult Any one of blade position occur little damage when detection can come out alarm, can not complete detection blade it is each A part because object occur fracture be typically all first due to portion compare other positions weak not enough or by Power is uneven and breakage first occurs, and then expanding to other positions causes complete rupture, such as blade that very little occurs at a position Crack the reasons such as may vibrate with the stretching in using and constantly expand and is broken suddenly until the position is unbearable, Therefore the blade state of the detection blower fan of better method and device promptly and accurately is needed, while also needs to continuously improve blade Structure is to improve Blade Properties.
Summary of the invention
The object of the present invention is to provide fan blade detection method and devices, find the breakage that blade occurs in time, and same When a kind of method that fan blade resists bending, a kind of method reducing blade damage and a kind of side for reducing blade vibration are provided Method.
A kind of fan blade detection method, inside fan blade in have a closed cavity, it is of the present invention closed to refer to Confined gas makes the air pressure of cavity inside be higher or lower than the air pressure in blade external world, and extraneous formation draught head, when blade have it is broken Damage gas can flow in or out blade, blade state be detected by detecting the atmospheric pressure value inside closed blade cavity, if cavity Internal atmospheric pressure value is higher or lower than comparison value, illustrates have blade exterior gas to enter blade cavity, blade has damaged leakage, base The determination of this comparison value is to detect its gas inside the blade cavity under each working condition when blade is intact Pressure value, the detection of atmospheric pressure value is referring to blade interior different temperatures value and fan blade revolving speed corrected Calculation, in different environment temperature It spends, under the conditions of different rotation speed of fan etc., the atmospheric pressure value of blade interior be will be different, and need to be modified.
Preferable scheme is that closed cavity air pressure inside is greater than blade ambient pressure in fan blade.
A kind of fan blade detection device, fan blade have closed cavity, set air pressure sensing device and temperature in fan blade Sensing device is spent, air pressure and temperature in detection blower fan blade closed cavity can be by air pressure sensing device and temperature sensing devices It is fixed on blade cavity inner wall, acquisition data draw blade with conducting wire, if power supply, controller and signal emission module, air pressure transmission Induction device and temperature sensing device are connect with controller, and controller is connect with signal emission module, and controller connects to power supply, control Device processed mainly carries out electric power distribution conveying and signal processing to each section, and ground sets signal receiving module, signal emission module with Signal receiving module pairing, can contact between signal emission module and signal receiving module, by various modes by infrared Line, laser, radio, GPRS network, WIFI network etc. mainly solve the sensing data signals of the fan blade constantly operated Transmission problem, controller, sender unit and battery can also be arranged in each blade connection center and revolve together with blade The positions such as inside the impeller wheel cover turned.
Blower is equipped with ground control centre, and control centre at least connect with a Fans, with advances in technology, existing wind Machine control centre is able to carry out overall monitor, monitors the power output state of blower, and the adjusting of blade angle controls opening for blower Dynamic movement, the signal receiving module such as stop is connect with control centre, the data processing of acquisition is transferred to control centre, in control The data that heart detection receiving module transmits, are compared with fan blade normal internal air pressure comparison value under the same working condition of blower It is right, deviate comparison value setting range control centre by the way that feathering system or brake system of blower host etc. is arranged in and executes life It enables, controls the operating of corresponding blower, or stop the operating of corresponding blower.
Baroceptor, temperature sensor, controller, sender unit and battery also can be set in blade interior The antenna of cavity, sender unit draws blade, sets dismountable sealable opening in blade and facilitates inside maintenance and inspection Equipment is connected by the solar battery of conducting wire and blade surface.
The so-called setting of signal receiving module and control centre is in ground, including but not limited to ground, some blower fan systems Its control centre is arranged inside blower fan tower barrel, and signal receiving module also can be set in blower fan tower barrel or blower host cabin Equal positions.
Control centre is additionally provided with alarm system, and alarm system includes sound, light and mobile communication terminal alarm at least its A kind of middle type of alarm, live people can be reminded in faulty generation for setting sound-light alarm note that net is arranged in control centre It closes and the network connection devices such as router, with the universal use of mobile communications tool, the especially use of intelligent communication tool, Such as smart phone can use mobile phone by network in control by installing corresponding control program in smart phone The case where heart, remotely monitors, timely solution of finding the problem.
Power supply is set on blade as battery, battery is connect with the solar battery that fan blade surface is arranged in, too Positive energy battery is attached to blade surface, on the central axis wheel cover of blade rotation center position or wind wheel, absorbs sunlight transformation For electric energy, connecting controller is that each sensing device and signal emission module supply electric power, can also be generated electricity using minitype wind power Device or other modes power supply.
Multiple closed cavities are set in fan blade, multiple closed cavities are apart from one another by each cavity at least provided with gas Press sensing device, in this way setting can more acurrate detection vane leakage damage location, interval between cavity while can reinforce Blade construction, interval can be laterally or longitudinally arranged along blade.
A method of blade damage being reduced, fan blade is root of blade close to the position of shaft, and blade free end is Blade tip keeps multiple closed cavities mutual in fan blade along root of blade to multiple closed cavities are set between blade tip It being isolated, the interval between cavity makes confined gas between cavity, and blade interior gas generates centrifugal force because blade rotates, The centrifugal force of centrifugal force, that is, centripetal force, each confined air intracavity gas is distinguished by its closed interval far from blade rotation center side It bears, if blade interior is not provided with closed interval, or has interval without closed, entire blade interior gas connection, as Fluid, when blade rotation, the centrifugal force of blade interior all gas is from root of blade until blade tip, all superposition is applied It is added on blade distalmost end blade tip position, the blade tip position of blade distalmost end needs again because structure design is compared to root of blade Light and thin, the single length of blade of large fan is generally more than 50 meters, the blade tip speed of service at 100 kilometer per hours or more, By taking air as an example, about 1.29 kilograms of the weight of every cube of air, each about several cubic meters of blade interior cavity volume are produced Raw very big centrifugal force, blade interior all gas are compressed to the blade tip far from rotation center under the influence of centrifugal force, in blade It is deviated when the center of gravity of portion's all gas is more static than blade to blade tip, and the centrifugal force of blade interior all gas acts on Blade tip position, action principle are similar in fixed one several kilogram weights of the object of vane tip apart from 50 meters of rotation center Body, if the dispersion of same weight is fixed on root of blade or intermediate position, since angular velocity of rotation is the same, and radius of turn is small Very much, centrifugal force calculation formula is it is found that F=mrw^2, F represent centripetal force, and m represents mass of object, and r represents radius of turn, and w is represented Angular velocity of rotation, object of which movement centrifugal force, that is, centripetal force, size and mass of object, the quadratic sum radius of turn of angular velocity of satellite motion It is directly proportional, so the centrifugal force generated, which also compares, is fixed on that blade tip position is small, and disperses force acts on blade different parts can Blade damage is reduced, during designing fan blade modeling, this active force is not present in static state in blade, and this problem is normal The reason of being often not taken care and becoming blade damage, it is therefore preferable that blade interior gas compares the sky in the blade external world using density The small gas of gas is achieved because the present invention keeps blade interior cavity closed, such as using nitrogen, helium etc., with simultaneously Leaf weight and rotary centrifugal force are reduced, blade interior deterioration by oxidation can also be prevented using inert gas.
A kind of method that fan blade resists bending has closed cavity in fan blade, cavity inside air pressure is made to be greater than leaf Piece ambient pressure can reduce pressure suffered in the certain positions of blade, in turn when blade wind-engaging power is acted on and worked Improve the ability that blade resists bending, it is in oblate wing that blade, which is usually cross section, one facing towards windward, one facing towards Leeward, when having wind to blade, the windward side of blade will bear to increase pulling force, and the leeward of blade will bear to increase pressure, The material of production blade is usually the composite material of carbon fiber or glass fibre etc., in order to mitigate weight, each position of blade as far as possible For laminated structure thin as far as possible, as the laminated structure of blade construction, its tensile resistence being able to bear is far longer than compressive resistance, Therefore the leeward of blade is easy bending, damaged blade, if the air pressure in blade closed cavity is made to be greater than ambient pressure, will make A prestretching force is born at each position of blade cavity, this pretension will can offset part power of the blade by pressure position Amount, makes blade be less likely to occur to bend, compares use increaseds thickness by pressure position in this way to improve the position Intensity method, save leaf weight, save the cost.
A method of reduce blade vibration, blade in use, the stress bending deformation by wind, the power of wind Measure unstable, vane stress is also unstable, thus generates vibration, and covibration, leaf can be also generated because of air-flow and other reasons Because being designed as the strip blade that cross section is discoid shape, blower is equipped with to blower structure piece, makes blade wide in use Two faces be windward side and leeward, therefore the vibration of blade mainly vibrated back and forth along this direction, have in blade close Cavity is closed, cavity inside air pressure is made to be greater than blade ambient pressure, according to saying for a kind of above-mentioned method of fan blade resistance bending Bright, because improving the intensity of the resistance bending of blade, the raising of this intensity mainly enhances blade and exists same principle Intensity between windward side and leeward, it is consistent with the direction that blade vibrates, while the interval between closed cavity has The effect of ribs, therefore reduce the vibration of blade.
The air pressure detection of fan blade can be dynamic or static, it can air pressure is arranged after the completion of blade body Sensing device and temperature sensing device detect whether its air pressure within certain period changes when stationary, thus Judge whether blade has leakage damaged, when being such as delivered for use after the completion of factory's leaf production, can first be detected, Blade surface, which smears the substance for being easy to produce bubble or immerses blade in liquid, can detecte the damaged specifically position of leakage, really After fixed blade is intact, in the atmospheric pressure value of different temperatures some monitoring devices and report can be arranged in company with blade in record blade Alarm device, such as the monitor of air pressure and temperature, factory is checked and accepted with blade together, is sent by the haulage stage to blower place, In transportational process, the atmospheric pressure value of blade and temperature value can observe the situation of blade in time check at any time, if way in transit Blade has leakage damaged, where finding the problem in time, stops the transport toward destination, being avoided that factory in this way, qualified blade exists Transportational process goes wrong, and arrives at the destination as substandard product and installs, and can accurately find out and ask in which section Topic and reason, call to account, can also detect the variation of air pressure in blade, in the course of work of blade whether to judge blade There is leakage breakage, air valve or relief valve etc. can be set in blade surface, be connected to the blade external world and blade interior cavity, it is right using its Blade is inflated or air suction process, can to blade interior cavity air pressure adjustment, for example, adaptation winter or summer etc. due to Temperature greatest differences and cause blade interior air pressure change.
Method and device of the invention equally uses the blade of vertical axis aerogenerator.
Even if in blade, there is no when breakage leakage, blade can cause air pressure inside to become in due to deformation Change, detect these air pressure changes, there can be an anticipation to the operation conditions of blade, to avoid there is blade breakage fracture etc. Extreme phenomenon, such as when have high wind or strong gusts of wind, blade can bend, serious to collide fan supporter or tower Cylinder can predict and take blade feathering or blade brake etc. to avoid that serious consequence occurs by monitoring the variation of blade air pressure.
The invention has the advantages that closed cavity, setting is arranged in blade interior by a series of method and device Air pressure sensing device makes blade interior air pressure be greater than external pressure etc., is capable of the operation shape of timely and accurately detection blower fan blade State enables blade to bear bigger external force, and it is thus achieved that simple improvement creation multiple use, reduces the centrifugation of blade Power reduces the bending of blade, reduces the vibration of blade, these are all conducive to blade and improve efficiency, and reduces loss, increases power generation Amount, method and device of the invention is simple and reliable easy to accomplish, compares and lays the methods of sensing line in blade, can only detect Sense line crosses the information of position, and the present invention, which is able to detect, finds that the leakage of the entire almost all of position of blade is damaged, gives leaf The detection and maintenance of piece provide reliable basis.
Detailed description of the invention
Fig. 1 is a kind of fan blade of the invention along root to blade tip diagrammatic cross-section;
Fig. 2 is a kind of fan blade stress diagram of the invention;
Fig. 3 is a kind of fan blade detection process figure of the invention;
1 is main shaft in figure, and 2 be windward side, and 3 be control box, and 4 be sensing device, and 5 be interval, and 6 be cavity, and 7 be leeward.
Specific embodiment
Present invention will be further explained below with reference to specific examples, and Fig. 1 is a kind of fan blade of the invention along root To blade tip diagrammatic cross-section, 1 is main shaft in figure, and fan blade connect with main shaft 1, in blade equipped with controlling near main shaft 1 Box 3, control box 3 in be equipped with controller, battery and signal emission module, controller respectively with battery and signal emission module Connection, 2 be the windward side of blade, and control box 3 is arranged in blade leeward side, and sensing device 4 is fixed on blade inner wall, sensing device Including temperature sensing device and air pressure sensing device, these present sensing devices can choose there are many kinds of class, it is preferred to use number The electronic sensing device of word formula, the high accuracy number baroceptor such as made of silicon materials, size and weight all very littles, Measurement accuracy is high, small by environmental influence, draws blade by data line and connect with controller, the transducing signal of multiple blades Inside is divided into several closed cavities 6 by interval 5, filled in cavity 6 by the controller being connected in a control box, blade Gas is helium, and 6 air pressure inside of cavity is made to be greater than blade exterior air pressure, and ground sets signal receiving module, signal emission module It is matched with signal receiving module, blower is equipped with ground control centre, and control centre at least connect with a Fans, with technology Progress, existing air-blower control center is able to carry out overall monitor, monitors the power output state of blower, the adjusting of blade angle, It controls movement, the signal receiving modules such as the starting stopping of blower to connect with control centre, control centre's detection receiving module transmits Numerical value, be compared with blower blade interior air pressure comparison value under the same working condition of blower, deviate comparison value setting range Control centre stops the operating of corresponding blower, and control centre is additionally provided with alarm system, and alarm system includes sound, light and movement At least one of type of alarm of communication terminal alarm, setting sound-light alarm can remind people note that faulty generation, with The universal use of mobile communications tool, the especially use of intelligent communication tool, such as smart phone, by smart phone The corresponding control program of installation, can use mobile phone by network to control centre the case where remotely monitor, find the problem in time It solves.
Power supply is set on blade as battery, battery is connect with the solar battery that fan blade surface is arranged in, too Positive energy battery is attached to blade surface, absorbs sunlight and is changed into electric energy, connection controller is that each sensing device and signal emit Module supplies electric power, can also be powered using Miniature wind-driven generator or other modes.
Fig. 2 is a kind of fan blade stress diagram of the invention, and 1 is main shaft in figure, and 2 be windward side, and 3 be control box, 4 For sensing device, 5 be interval, and 6 be cavity, and 7 be leeward, and blade is connect with main shaft 1 in figure, and wind is from the windward side of blade 2 Direction blow to blade, increase by 2 position of windward side of blade and bear drawing force, and in the blade with 2 opposite of blade windward side 7 position of leeward increase and bear pressure, blade is divided into interval 5 by a plurality of cavities 6 in blade interior, makes tool in fan blade There is closed cavity 6, fill helium inside cavity 6,6 helium gas inside air pressure of cavity is made to be greater than blade ambient pressure, in blade wind-engaging When power is acted on and worked, intensity is improved in order to mitigate weight as far as possible, the material for making blade is carbon fibre composite, leaf Each position of piece is laminated structure thin as far as possible, and as the laminated structure of blade construction, its tensile resistence being able to bear is far longer than Compressive resistance, if therefore the leeward 7 of blade be easy to be under pressure to be easy to happen bending and cause to damage entire blade, and in blade Filling helium in closed cavity 6 makes 6 helium gas inside air pressure of cavity be greater than ambient pressure, will make each position of blade cavity include One prestretching force is born when blade is not by wind by wind face 7, blade by wind then, this prestretching Stretch will can offset part strength of the blade by pressure position, and blade is made to be less likely to occur to bend.
Fig. 3 is that a kind of fan blade of the invention detects basic process figure, includes detection process and corresponding work dress in figure It sets.
Above-described embodiment has carried out exemplary embodiment to partial content of the invention, and methods and apparatus of the present invention is unlimited In specific embodiment as described herein, the detection system that method and device of the invention can be combined with blower host come using, It can also be carried out in conjunction with the method and device of other detection blower fan blade states.

Claims (10)

1. a kind of fan blade detection method, inside fan blade in have closed cavity, be higher than the air pressure of cavity inside or low Air pressure in the blade external world forms draught head with the external world, when blade has damaged gas that can flow in or out blade, by detecting leaf Atmospheric pressure value inside piece closed cavity detects blade state, if the atmospheric pressure value of cavity inside is higher or lower than comparison value, explanation There is blade exterior gas to enter blade cavity, blade has damaged leakage.
2. a kind of fan blade detection method according to claim 1, it is characterized in that: the detection of atmospheric pressure value is referring in blade Portion's different temperatures value and fan blade revolving speed corrected Calculation.
3. a kind of fan blade detection method according to claim 1, it is characterized in that: in fan blade inside closed cavity Air pressure is greater than blade ambient pressure.
4. a kind of fan blade detection device, it is characterized in that: a kind of fan blade detection device, sets air pressure transmission in fan blade Induction device and temperature sensing device, air pressure and temperature in detection blower fan blade closed cavity, if power supply, controller and signal transmitting Module, air pressure sensing device and temperature sensing device are connect with controller, and controller is connect with signal emission module, controller with Power supply connection, ground set signal receiving module, and signal emission module and signal receiving module match.
5. a kind of fan blade detection device according to claim 4, it is characterized in that: blower is equipped with ground control centre, Control centre at least connect with a Fans, monitors the power output state of blower, controls the movements such as the starting stopping of blower, letter Number receiving module is connect with control centre, the data that control centre's detection receiving module transmits, under the same working condition of blower Fan blade normal internal air pressure comparison value is compared, and deviates the fortune that comparison value setting range control centre stops corresponding blower Turn.
6. a kind of fan blade detection device according to claim 4, it is characterized in that: its control centre is additionally provided with alarm system System, alarm system include sound, and light and mobile communication terminal alarm are alarmed a kind of mode at least within.
7. a kind of fan blade detection device according to claim 4, it is characterized in that: it sets power supply on blade as electric power storage Pond, battery are connect with the solar battery that fan blade surface is arranged in.
8. a kind of method that fan blade resists bending, there is closed cavity in fan blade, cavity inside air pressure is made to be greater than leaf Piece ambient pressure.
9. a kind of method for reducing blade vibration, there is closed cavity in fan blade, it is greater than cavity inside air pressure outside blade Boundary's air pressure.
10. a kind of method for reducing blade damage, multiple close to being set between blade tip along root of blade in fan blade Close cavity, be mutually isolated multiple closed cavities, the interval between cavity makes confined gas between cavity, blade interior gas because Centrifugal force is generated for blade rotation, the centrifugal force of each confined air intracavity gas is by its interval far from blade rotation center side It is respectively subjected to.
CN201910241186.2A 2019-03-28 2019-03-28 Fan blade detection method and device Pending CN109854460A (en)

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Application Number Priority Date Filing Date Title
CN201910241186.2A CN109854460A (en) 2019-03-28 2019-03-28 Fan blade detection method and device

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111307439A (en) * 2020-03-12 2020-06-19 三一重能有限公司 Wind driven generator blade defect detection method, device, equipment and storage medium

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US20030101798A1 (en) * 2001-12-05 2003-06-05 The Entwistle Company Helicopter hollow blade pressure check and fill apparatus and method to use same
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CN102506009A (en) * 2011-11-21 2012-06-20 上海大学 Inflatable self-adapting deformable blade
KR20130139523A (en) * 2012-06-13 2013-12-23 삼성중공업 주식회사 Blade damage test system used for wind turbine, and blade damage test method using the same
CN108760187A (en) * 2018-06-29 2018-11-06 江苏金风科技有限公司 Blade crack state monitoring method, monitoring system and blade

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3985318A (en) * 1975-11-14 1976-10-12 Tyco Laboratories, Inc. Helicopter blade crack indicator
CN1122903A (en) * 1994-11-05 1996-05-22 郁金香湾有限公司 Monitoring apparatus
US20030101798A1 (en) * 2001-12-05 2003-06-05 The Entwistle Company Helicopter hollow blade pressure check and fill apparatus and method to use same
CN101000041A (en) * 2006-09-04 2007-07-18 陈亚洲 Inflating windpower generator blade
CN101688824A (en) * 2007-05-30 2010-03-31 维斯塔斯风力系统集团公司 A fatigue testing device for wind turbine blade testing, a method of testing wind turbine blades and a control system for a blade testing actuator
CN102052259A (en) * 2009-11-06 2011-05-11 北京理工大学 Blade of air-bag wind driven generator
CN102506009A (en) * 2011-11-21 2012-06-20 上海大学 Inflatable self-adapting deformable blade
KR20130139523A (en) * 2012-06-13 2013-12-23 삼성중공업 주식회사 Blade damage test system used for wind turbine, and blade damage test method using the same
CN108760187A (en) * 2018-06-29 2018-11-06 江苏金风科技有限公司 Blade crack state monitoring method, monitoring system and blade

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111307439A (en) * 2020-03-12 2020-06-19 三一重能有限公司 Wind driven generator blade defect detection method, device, equipment and storage medium

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