• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    It is a device for detecting a Eisbelags on the rotor blades (5) of a wind turbine (1) with a transmitting and receiving device on the one hand on the rotor blades (5) and on the other hand stationarily arranged, connected to each other via a wireless transmission path parts and with one of the Transmitter and receiver device connected evaluation circuit (9) described. In order to create advantageous design conditions, it is proposed that the transceiver comprises passive transponders (6) on the rotor blades (5) and at least one stationary reading unit (7) for the transponders (6) and that the evaluation circuit (9) comprises a comparator stage (10) for the safe reading of the transponder (6) required minimum transmission power of the reading unit (7) having a predetermined threshold value of this transmission power when an ice pad occurs.
    公开号:AT512155A4
    申请号:T50221/2012
    申请日:2012-06-05
    公开日:2013-06-15
    发明作者:
    申请人:Hainzl Industriesysteme Gmbh；
    IPC主号:
    专利说明:

    1
    ¢ 38623) II
    The invention relates to a device for detecting an ice covering on the rotor blades of a wind turbine with a transmitting and receiving device on the one hand on the rotor blades and on the other hand stationarily arranged, connected to each other via a wireless transmission path parts and with an evaluation circuit connected to the transmitting and receiving device ,
    Apart from the additional load of the rotor blades of a wind turbine through an ice coating, such an ice covering, which forms in particular in the flow area of the rotor blades, changes the flow profile, so that a deterioration of the efficiency of the wind turbine is to be expected. For the operation of wind turbines, the monitoring of the rotor blades on a possible ice formation thus has a significant importance. To monitor the rotor blades with respect to icing different measures are known, it has already been proposed (DE 10 2005 016 524 A1), in addition to the meteorological conditions in connection with a risk of icing to detect the changing with a Eisbelag mass ratios of the rotor blades, for example via The bending moments occurring at the blade roots, which is not only expensive, but only provides measurement results when due to a considerable ice formation, the mass ratios change sufficiently for detection.
    Another possibility is (DE 10 2006 032 387 A1) to detect the formation of ice optically with the aid of laser beams which are aligned along the surface of the rotor blades which tends to form ice and, due to the interaction with ice formed on the surface, a parameter for ice formation. Another disadvantage is the relative insensitivity of the detection of a resulting ice film. In addition, energy-supplied design elements are to be provided on the rotor blades.
    In another known method for monitoring the formation of ice on Ro-torblättem (DE 10 2005 017 054 A1), the vibration behavior of the rotor blades is monitored, which changes in the formation of ice. For this purpose, the structure-borne sound of the rotor blades is measured at different locations at least in selected frequency ranges and monitored for characteristic changes for the detection of ice formation. Again, a comparatively high design effort is expected.
    The invention is therefore based on the object, an apparatus for monitoring of rotor blades of a wind turbine on the formation of an ice sheet in such a way that with simple constructive means a secure detection of Eisbelags is possible without having to provide energy sources on the rotor blades.
    Starting from a device of the type described for detecting a Eisbelags on the rotor blades of a wind turbine, the invention solves this problem in that the transmitting and receiving device includes passive transponder on the rotor blades and at least one stationary reading unit for the transponder and that the evaluation circuit a Comparator stage for the required for safe reading of the transponder minimum transmission power of the reading unit with a predetermined threshold value of this transmission power when an ice pad occurs.
    The invention is based on the finding that when covering a passive transponder with an ice sheet, the electric field radiated by the reading device is damped, so that due to such damping any ice coating can be reliably detected. For this purpose, it is only necessary to set a threshold value for the transmission power required for the response of the passive transponder when an ice pad occurs, in order to check whether the minimum transmission power of the reading device required for safe reading of the transponder is below or above this threshold value , If the minimum transmission power of the reading device required for safe reading of the transponder is below the predetermined threshold value, then no ice formation determining the threshold value can be present. If the minimum transmission power required for safe reading of the transponders reaches the prescribed threshold value, then a corresponding ice coating is present in the area of the transponders. In the simplest case, the threshold value can be determined empirically and selected as a function of the sensitivity of the respectively required monitoring. Since the energy for reading the passive transponders is transmitted via the electric field sent by the reading unit to the transponders, which only respond when receiving a sufficient electrical energy, simple construction conditions result, especially since corresponding passive transponders without difficulty at the sites sensitive to ice formation the rotor blades can be attached.
    In order to ensure a sensitive monitoring of ice formation on the rotor blades of a wind turbine, the transmission power of the reading unit via a control device in response to the response of the transponder can be at least gradually increased, so that the readout of the transponder to be provided minimum transmission power of the reading unit safely detected can be. Therefore, it only requires a suitable evaluation circuit in order to compare the transmission power of the reading unit detected in the response of the transponder in a comparator stage with the predetermined threshold value of this transmission power when an ice coating occurs and to display ice formation depending thereon.
    In the drawing, the subject invention is shown, for example. Show it
    1 shows a wind turbine with a device according to the invention for detecting an ice covering on the rotor blades in a schematic view and 4
    2 shows such a device according to the invention in a schematic block diagram.
    From Fig. 1, a wind turbine 1 can be seen on a stand 2, which carries a rotatably mounted about a vertical axis housing 3 for the turbine rotor 4.
    The rotor blades 5 are provided with passive transponders 6, which are distributed over the surface areas of the rotor blades 5 that are susceptible to icing. For reading these transponders 6, distributed reading units 7 are provided over the circumference of the stator 2 in order to take into account the orientation of the turbine rotor 4 with respect to the wind and for each rotational position of the housing 3 relative to the stator 2 reading the transponder 6 via at least one of the reading units 7 sure.
    According to FIG. 2, each reading unit 7 is supplied with electrical energy via a power stage 8, which provides the minimum transmission power required for reading the passive transponders 6. This required for safe reading of the transponder 6 minimum transmission power is evaluated in an evaluation circuit 9 for detecting a vulnerable Eisbelags in the range of one of the transponder 6 by this minimum transmission power for safe reading of the transponder 6 in a comparator stage 10 of the evaluation circuit 9 with a memory 11 stored threshold corresponding to that minimum transmission power required to read the transponder 6 at least to be detected ice pad. If the respective transmission power necessary for the response of the transponder 6 is below this threshold value, there is no ice covering to be detected. When this threshold value is exceeded, however, an ice covering to be considered is present, which is indicated in the display and input stage 12 connected to the evaluation circuit 9. About this display and input stage 12, the respective threshold value of the transmission power can be read into the memory 11.
    If the transponder 6 can not be read at a transmission power of the reading unit 7 set via the power level 8, then the transmission power is transmitted via the mmm 5
    Performance level 8 increased at least gradually. For this purpose, a control device 13 is acted upon by the reading unit 7, which controls the power stage 8 in the sense of an increase in power for the reading unit 7. If this transmission power suffices for reading out the passive transponder 6, the evaluation circuit 9 connected to the reading unit 7 is acted upon by the actual value of this transmission power in order to be able to judge any possible ice formation via the comparison with the predetermined threshold value of this power. If the transponder 6 can not yet be read, the transmission power is further increased by the control device 13 until the passive transponder 6 responds and can be read. For the detection of ice formation on the rotor blades 5, it is sufficient to read an identifier of the individual transponders 6, because the position of the transponders 6 on the respective rotor blade 5 can be determined via the transponder identification, so that an incipient icing of the rotor blade 5 is locally detectable, when the rotor blade 5 is moved past the respective stationary reading unit 7. Due to the limitation of the transmission path due to the use of passive transponders 6, it may be necessary to provide a plurality of read units 7 distributed over the height of the stand 2 for the transponders 6 distributed over the rotor blades 5.
    权利要求:
    Claims (2)
    [1]
    Printed: 064) 6-2012 £ 014.1 10 2012/50221 Patent Attorneys Dipl.-Ing. Helmut Hübscher Dipl.-Ing. 1. A device for detecting an ice covering on the rotor blades (5) of a wind turbine (1) with a transmitting and receiving device on the one hand on the rotor blades (5) and on the other hand stationary arranged, connected to each other via a wireless transmission path parts and with an evaluation circuit connected to the transmitting and receiving device (9), characterized in that the transmitting and receiving device passive transponder (6) on the rotor blades (5) and at least one stationary reading unit ( 7) for the transponder (6) and that the evaluation circuit (9) has a comparator stage (10) for the safe reading of the transponder (6) required minimum transmission power of the reading unit (7) with a predetermined threshold value of this transmission power when an ice pad occurs ,
    [2]
    2. Apparatus according to claim 1, characterized in that the transmission power of the reading unit (7) via a control device (13) in response to the response of the transponder (6) is at least gradually enlarged. Linz, on June 5, 2012 Hainzl Industriesysteme GmbH by: / DI Helmut Hübscher / (electronically signed)
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    同族专利:
    公开号 | 公开日
    CA2817513A1|2013-12-05|
    AT512155B1|2013-06-15|
    US20130323057A1|2013-12-05|
    EP2672113A2|2013-12-11|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE4023982A1|1989-08-07|1991-02-14|Gen Electric|SYSTEM AND METHOD FOR NOTIFYING ICING, IN PARTICULAR A PROPELLER BLADE|
    DE102007001507A1|2006-01-10|2007-08-16|General Electric Co.|A method and arrangement for detecting leaf condition / status in a wind turbine|
    US20100021298A1|2007-03-30|2010-01-28|Ingemann Hvas Sandvad|Wind Turbine Blade Position Determination System|
    US6430996B1|1999-11-09|2002-08-13|Mark Anderson|Probe and integrated ice detection and air data system|
    ITTO20020908A1|2002-10-17|2004-04-18|Lorenzo Battisti|ANTI-ICE SYSTEM FOR WIND SYSTEMS.|
    US7086834B2|2004-06-10|2006-08-08|General Electric Company|Methods and apparatus for rotor blade ice detection|
    DE102005017054B4|2004-07-28|2012-01-05|Igus - Innovative Technische Systeme Gmbh|Method and device for monitoring the condition of rotor blades on wind turbines|
    ITTO20060400A1|2006-05-31|2007-12-01|Lorenzo Battisti|METHOD AND SYSTEM FOR DETECTION OF DANGER OF ICE FORMATION ON AERODYNAMIC SURFACES|
    DE102006032387A1|2006-07-13|2008-01-24|Repower Systems Ag|Wind turbine, has rotor blade with ice detection device having laser, where laser beam of laser runs within area of surface of component, and sensor provided in optical path of beam and detecting changes of physical characteristics of beam|
    EP2130009A2|2007-03-29|2009-12-09|Vestas Wind Systems A/S|Method for inspecting at least one rotor blade of a wind turbine and inspection system for at least one rotor blade of a wind turbine|
    US20120207589A1|2009-07-23|2012-08-16|Liwas Aps|Detection of ice on airfoils|
    US8434360B2|2011-07-22|2013-05-07|General Electric Company|System and method for detecting ice on a wind turbine rotor blade|WO2015160656A1|2014-04-16|2015-10-22|Flsmidth A/S|Methods and apparatus for the continuous monitoring of wear in flotation circuits|
    CN106091894B|2016-06-30|2018-11-16|洛阳双瑞精铸钛业有限公司|A kind of detection method of turbine rotor blade|
    FR3060063B1|2016-12-13|2019-05-17|Electricite De France|METHOD FOR DETECTING FRICTION AND DEFROSTING|
    US20190286963A1|2018-03-13|2019-09-19|3M Innovative Properties Company|Ultra-high frequency antenna tag|
    法律状态:
    2013-11-15| HA| Change or addition of new inventor|Inventor name: DIPL.ING. DR. CLEMENS HESCH, AT Effective date: 20130917 Inventor name: DIPL.ING. DR. THOMAS BUCHEGGER, AT Effective date: 20130917 |
    2018-02-15| MM01| Lapse because of not paying annual fees|Effective date: 20170605 |
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50221/2012A|AT512155B1|2012-06-05|2012-06-05|Device for detecting an ice covering on the rotor blades of a wind turbine|ATA50221/2012A| AT512155B1|2012-06-05|2012-06-05|Device for detecting an ice covering on the rotor blades of a wind turbine|
    EP13167823.7A| EP2672113A2|2012-06-05|2013-05-15|Device for detecting a layer of ice on the rotor blades of a wind turbine|
    CA2817513A| CA2817513A1|2012-06-05|2013-06-03|Apparatus for measuring ice deposition on the rotor blades of a wind turbine|
    US13/909,249| US20130323057A1|2012-06-05|2013-06-04|Apparatus for measuring ice deposition on the rotor blades of a wind turbine|
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