CN112281935B - Dynamic monitoring system and method for fan foundation ring - Google Patents

Dynamic monitoring system and method for fan foundation ring Download PDF

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Publication number
CN112281935B
CN112281935B CN202011120776.9A CN202011120776A CN112281935B CN 112281935 B CN112281935 B CN 112281935B CN 202011120776 A CN202011120776 A CN 202011120776A CN 112281935 B CN112281935 B CN 112281935B
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wind turbine
foundation ring
fan
laser displacement
sensor
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CN112281935A (en
Inventor
赵道程
郭小华
王新泉
幸坤涛
关键
于英俊
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Central Research Institute of Building and Construction Co Ltd MCC Group
MCC Inspection and Certification Co Ltd
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Central Research Institute of Building and Construction Co Ltd MCC Group
MCC Inspection and Certification Co Ltd
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D33/00—Testing foundations or foundation structures
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00—Foundations as substructures
    • E02D27/32—Foundations for special purposes
    • E02D27/42—Foundations for poles, masts or chimneys
    • E02D27/425—Foundations for poles, masts or chimneys specially adapted for wind motors masts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
    • F03D13/20—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
    • F03D13/22—Foundations specially adapted for wind motors
    • 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
    • G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/16—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge
    • G01B7/18—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge using change in resistance
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C9/00—Measuring inclination, e.g. by clinometers, by levels
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2600/00—Miscellaneous
    • E02D2600/10—Miscellaneous comprising sensor means
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/728—Onshore wind turbines

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Paleontology (AREA)
  • Mining & Mineral Resources (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Remote Sensing (AREA)
  • Mechanical Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical & Material Sciences (AREA)
  • Sustainable Energy (AREA)
  • Sustainable Development (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Wind Motors (AREA)
  • Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)

Abstract

The invention provides a dynamic monitoring system and method for a fan foundation ring. This dynamic monitoring system of fan foundation ring includes: level bubble, device box, unipolar tilt angle sensor, laser displacement sensor, data acquisition module, device fixed bolster, leveling nut, magnetism fixing support, laser reflection panel, resistance strain gauge and data processing terminal. The invention can be used for rapidly and effectively dynamically monitoring the vertical displacement of the fan foundation ring.

Description

Dynamic monitoring system and method for fan foundation ring
Technical Field
The application relates to the technical field of engineering structure monitoring, in particular to a dynamic monitoring system and method for a fan foundation ring. The system and the method are a dynamic monitoring system and a dynamic monitoring method for the vertical displacement of the fan foundation ring, wherein the elastic deformation of the foundation ring is considered.
Background
In recent years, the fan has the safety accidents that the foundation ring is separated from the peripheral concrete, the fan tower barrel shakes too much to cause the alarm stop of the fan, the fan cannot normally operate and even falls down. Therefore, the basic ring of the wind turbine needs to be monitored in real time so as to avoid corresponding safety accidents as much as possible.
The monitoring technology in the prior art usually adopts an inclinometer to detect the inclination angle of a wind turbine tower, the monitoring technology actually monitors tower equipment of a wind turbine, the monitoring result reflects the deformation of the tower equipment, and the change of the anchoring capacity of a wind power foundation to a foundation ring cannot be directly reflected, namely, the weak part with lower safety margin, namely the damage degree of concrete at the periphery of the foundation ring cannot be monitored and early warned.
Disclosure of Invention
In view of this, the invention provides a dynamic monitoring system and method for a fan foundation ring, so that the vertical displacement of the fan foundation ring can be dynamically monitored quickly and effectively.
The technical scheme of the invention is realized in the following way:
a dynamic monitoring system of a wind turbine foundation ring comprises: the device comprises a leveling bubble, a device box, a single-axis tilt sensor, a laser displacement sensor, a data acquisition module, a device fixing bracket, a leveling nut, a magnetic fixing support, a laser reflection panel, a resistance strain gauge and a data processing terminal;
the device fixing bracket includes: side plates and a top plate;
the inner side of the magnetic fixed support is fixedly connected with the outer side of the side plate of the device fixing support; the outer side of the magnetic fixed support is fixed on the side wall of a flange on a basic ring of the fan;
the top of the device box is connected with the top plate of the device fixing bracket through a plurality of leveling nuts;
the leveling air bubble is arranged at the top of the device box;
the single-axis tilt angle sensor and the data acquisition module are arranged in the device box;
the laser displacement sensor is arranged at the bottom of the device box;
the single-axis tilt angle sensor and the laser displacement sensor are respectively connected with the data acquisition module through data lines;
the laser reflection panel is arranged on the top surface of the foundation concrete of the fan and corresponds to the laser displacement sensor;
the resistance strain gauge is arranged on the inner side wall of the base ring of the fan; the resistance strain gauge is connected with the data acquisition module through a data line;
the data acquisition module is connected with the data processing terminal through a data line.
Preferably, the dynamic monitoring system of the wind turbine foundation ring further includes: an interactive display interface;
the interactive display interface is arranged on the side surface of the device box and is connected with the data acquisition module;
and the interactive display interface is used for synchronously displaying corresponding data of the dynamic monitoring system of the fan foundation ring, and setting the sampling frequency of the single-axis tilt angle sensor and the laser displacement sensor through the interactive display interface.
Preferably, the dynamic monitoring system of the wind turbine foundation ring further includes: a power interface and a data transmission interface;
one end of the power supply interface is respectively connected with the single-shaft tilt angle sensor and the laser displacement sensor, and the other end of the power supply interface is connected with an external power supply;
one end of the data transmission interface is respectively connected with the single-axis tilt sensor, the laser displacement sensor and the resistance strain gauge, and the other end of the data transmission interface is connected with the data processing terminal.
Preferably, the dynamic monitoring system of the wind turbine foundation ring further includes: an alarm;
the data processing terminal is further used for sending an alarm instruction to the alarm when the calculated relative vertical displacement is larger than a preset displacement threshold;
and the alarm is used for giving an alarm according to the alarm instruction.
Preferably, the laser reflection panel is fixed on the top surface of the foundation concrete of the wind turbine through an anchor bolt.
Preferably, the sampling frequency of the single-axis tilt sensor, the laser displacement sensor and the resistance strain gauge is preset, and the sampling frequency of the single-axis tilt sensor, the sampling frequency of the laser displacement sensor and the sampling frequency of the resistance strain gauge are consistent.
Preferably, the sampling frequency is 5 acquisitions per second.
The invention also provides a dynamic monitoring method of the fan foundation ring, which comprises the following steps:
presetting a plurality of measuring point positions on a foundation ring of a fan to be monitored;
a dynamic monitoring system of the fan foundation ring as claimed in any one of claims 1 to 7 is respectively installed at each measuring point position;
before the wind turbine generator runs, obtaining a measured value in an initial state through data obtained by measuring a single-axis inclination angle sensor, a laser displacement sensor and a resistance strain gauge, and transmitting the measured value serving as an initial reference value to a data processing terminal;
after the wind turbine generator starts to operate, acquiring measured data in real time through a single-axis inclination angle sensor, a laser displacement sensor and a resistance strain gauge, and transmitting the measured data to a data processing terminal through a data acquisition module;
and the data processing terminal acquires and measures the data in real time according to the received initial reference value and the data acquired by the single-axis tilt sensor, the laser displacement sensor and the resistance strain gauge, and calculates the relative vertical displacement and the dynamic elastic deformation of the foundation ring of the fan at the measuring point.
Preferably, the relative vertical displacement of the foundation ring of the wind turbine at the measuring point is calculated by the following formula:
d i ＝L i cosθ i -(ε i -ε 0 )H-L 0 cosθ 0 ；
wherein d is i Is the relative vertical displacement of the fan foundation ring at the measuring point at the moment i, L 0 Is a distance value, epsilon, measured by a laser displacement sensor before the wind turbine generator runs 0 For operating at wind turbinesStrain value, theta, measured by front resistance strain gage 0 For measuring the inclination angle value L obtained by the single-shaft inclination angle sensor before the wind turbine generator runs i Is a distance value, epsilon, measured by a laser displacement sensor at the moment i after the wind turbine generator starts to operate i The strain value theta is measured by the resistance strain gauge at the time i after the wind turbine generator starts to operate i The inclination angle value is measured by the single-shaft inclination angle sensor at the moment i after the wind turbine generator starts to operate, and H is the total height of the foundation ring of the fan.
Preferably, the method further comprises:
and when the relative vertical displacement obtained by the calculation of the data processing terminal is greater than a preset displacement threshold value, alarming.
As can be seen from the above, in the dynamic monitoring system and method of the wind turbine foundation ring in the invention, because the single-axis tilt angle sensor, the laser displacement sensor and the resistance strain gauge are arranged in the monitoring system, the corresponding tilt angle value, the distance value from the system to the top surface of the foundation concrete of the wind turbine and the dynamic strain value of the foundation ring under the wind load can be obtained through measurement, and the relative vertical displacement of the foundation ring of the wind turbine at the measuring point and the dynamic elastic deformation of the foundation ring of the wind turbine at the measuring point under the wind load can be respectively obtained through calculation according to the tilt angle value, the distance value and the dynamic strain value, so that the vertical displacement of the foundation ring of the wind turbine can be rapidly, effectively and intuitively monitored and early warned dynamically, thereby the manpower and time operation and maintenance costs of the wind power plant can be effectively saved, the later operation and maintenance efficiency of the wind power plant can be greatly improved, and the economic benefits can be improved, avoid falling the tower etc. serious incident.
Drawings
FIG. 1 is a side cross-sectional view of a wind turbine foundation ring dynamics monitoring system in an embodiment of the present invention.
FIG. 2 is a top view of a wind turbine foundation ring dynamics monitoring system in an embodiment of the present invention.
FIG. 3 is a diagram of an interactive display interface in an embodiment of the invention.
FIG. 4 is a schematic view of a station arrangement in an embodiment of the present invention.
Fig. 5 is a schematic flow chart of a dynamic monitoring method for a wind turbine foundation ring according to an embodiment of the present invention.
Detailed Description
In order to make the technical scheme and advantages of the invention more apparent, the invention is further described in detail with reference to the accompanying drawings and specific embodiments.
In the technical scheme of the invention, the invention provides a dynamic monitoring system of a fan foundation ring.
As shown in fig. 1 to 2, a dynamic monitoring system of a wind turbine foundation ring in an embodiment of the present invention includes: the device comprises a leveling bubble 1, a device box 2, a single-axis tilt angle sensor 4, a laser displacement sensor 5, a data acquisition module 6, a device fixing bracket 9, a leveling nut 10, a magnetic fixing support 11, a laser reflection panel 12, a resistance strain gauge 14 and a data processing terminal (not shown in the figure);
wherein the device fixing bracket 9 includes: side plates and a top plate;
the inner side of the magnetic fixed support 11 and the outer side of the side plate of the device fixing support 9 are fixedly connected with the outer side of the magnetic fixed support 11 and fixed on the side wall of a flange 13 on a foundation ring of the fan;
the top of the device box 2 is connected with the top plate of the device fixing bracket 9 through a plurality of leveling nuts 10;
the level bubble 1 is arranged at the top of the device box 2;
the single-shaft tilt angle sensor 4 and the data acquisition module 6 are arranged in the device box 2;
the laser displacement sensor 5 is arranged at the bottom of the device box 2;
the single-axis tilt angle sensor 4 and the laser displacement sensor 5 are respectively connected with the data acquisition module 6 through data lines;
the laser reflection panel 12 is arranged on the top surface of the foundation concrete of the fan and at a position corresponding to the laser displacement sensor 5;
the resistance strain gauge 14 is arranged on the inner side wall of the base ring of the fan; the resistance strain gauge 14 is connected with the data acquisition module 6 through a data line 15;
and the data acquisition module 6 is connected with the data processing terminal through a data line.
When the dynamic monitoring system of the fan foundation ring is installed, the outer side of the magnetic fixing support 11 can be fixed on the side wall of the flange 13 on the fan foundation ring, and then the horizontal installation of the whole device can be realized by adjusting a plurality of (for example, 3) leveling nuts and cooperatively observing the condition of the leveling bubbles. Then, fixing the laser reflection panel 12 on the top surface of the foundation concrete of the fan, and enabling the positions of the laser reflection panel 12 and the high-precision laser displacement sensor 5 to correspond to each other; the laser reflection panel 12 may be used to reflect the laser light emitted from the laser displacement sensor 5. Since the surface of the laser reflection panel 12 is smooth, the adverse effect of the unevenness of the surface of the foundation concrete on the top surface of the foundation ring of the wind turbine on the measurement result can be reduced. Meanwhile, the resistance strain gauge 14 is arranged on the inner side wall of the basic ring of the fan and is connected with the data acquisition module 6 through a data line 15.
After the dynamic monitoring system of the fan foundation ring is installed, a corresponding inclination angle value, namely the inclination angle value of a flange on the foundation ring in a plane perpendicular to the tangent line of a measuring point of the foundation ring, can be obtained through measurement of the single-shaft inclination angle sensor 4, the inclination angle value can reflect the change of the horizontal angle of the measuring point of the dynamic monitoring system in the plane perpendicular to the tangent line of the fan foundation ring, and the inclination angle value can be transmitted to the data acquisition module 6 through a data line and transmitted to the data processing terminal through the data acquisition module 6; meanwhile, the distance from the high-precision laser displacement sensor 5 to the top surface of the foundation concrete of the fan can be measured by the high-precision laser displacement sensor 5 in the dynamic monitoring system, and the distance value can be transmitted to the data acquisition module 6 through a data line and transmitted to the data processing terminal through the data acquisition module 6; in addition, a dynamic strain value of the foundation ring at the measuring point under the action of the wind load can be measured through the resistance strain gauge 14 in the dynamic monitoring system, and the strain value can be transmitted to the data acquisition module 6 through a data line and transmitted to the data processing terminal through the data acquisition module 6.
The data processing terminal can calculate the relative vertical displacement of the foundation ring of the fan at the measuring point according to the received inclination angle value, the distance value and the strain value, and can also calculate the dynamic elastic deformation of the foundation ring of the fan at the measuring point under the action of wind load according to the received strain value.
Therefore, the dynamic monitoring system of the fan foundation ring can realize the remote real-time monitoring of the dynamic vertical displacement and the dynamic elastic deformation of the fan foundation ring,
in addition, as an example, in another preferred embodiment of the present invention, the sampling frequencies of the single-axis tilt sensor 4, the laser displacement sensor 5, and the resistance strain gauge 14 may be set in advance, and the sampling frequencies of the single-axis tilt sensor 4, the laser displacement sensor 5, and the resistance strain gauge 14 may be made to coincide.
In the technical scheme of the invention, the sampling frequencies of the single-axis tilt sensor 4, the laser displacement sensor 5 and the resistance strain gauge 14 can be preset according to the requirements of practical application conditions.
For example, in another preferred embodiment of the present invention, the sampling frequency may be 5 acquisitions per second, as an example.
In addition, as an example, in another preferred embodiment of the present invention, the dynamic monitoring system of the wind turbine foundation ring may further include: an interactive display interface 3;
the interactive display interface 3 is arranged on the side face of the device box 2, is connected with the data acquisition module 6 and is used for synchronously displaying corresponding data of a dynamic monitoring system of the fan foundation ring, and the interactive display interface 3 is provided with the sampling frequency of the single-axis inclination angle sensor 4 and the sampling frequency of the laser displacement sensor 5.
For example, as shown in fig. 3, in a preferred embodiment of the present invention, the corresponding data may include, but is not limited to: sampling frequency, reference distance L 0 Initial tilt angle theta 0 Initial strain ε 0 Real-time distance L, real-time inclination angle theta and real-time strain epsilon.
Through the displayed corresponding data, the staff can obtain the corresponding data in real time from the interactive display interface 3, and can set the sampling frequency of the single-axis tilt sensor 4, the laser displacement sensor 5 and the resistance strain gauge 14 through the interactive display interface 3.
In addition, as an example, in another preferred embodiment of the present invention, the dynamic monitoring system of the wind turbine foundation ring may further include: a power supply interface 7 and a data transmission interface 8;
one end of the power interface 7 is respectively connected with the single-shaft tilt angle sensor 4 and the laser displacement sensor 5, and the other end of the power interface is connected with an external power supply (for example, a power supply system inside a wind power tower);
one end of the data transmission interface 8 is respectively connected with the single-axis tilt angle sensor 4, the laser displacement sensor 5 and the resistance strain gauge 14, and the other end is connected with the data processing terminal (for example, the data processing terminal is connected with the signal transmission line of the wind turbine generator set and transmits the measured data to the data processing terminal arranged in the wind power plant monitoring room).
In addition, as an example, in another preferred embodiment of the present invention, the dynamic monitoring system of the wind turbine foundation ring may further include: an alarm;
the data processing terminal is further used for sending an alarm instruction to the alarm when the calculated relative vertical displacement is larger than a preset displacement threshold;
and the alarm is used for giving an alarm according to the alarm instruction.
Therefore, the alarm can also realize the functions of early warning or alarming.
In addition, as an example, in another preferred embodiment of the present invention, the laser reflection panel 12 is fixed to the top surface of the foundation concrete of the wind turbine by means of an anchor bolt.
In addition, in the technical scheme of the invention, based on the dynamic monitoring system of the fan foundation ring, a dynamic monitoring method of the fan foundation ring is also provided.
FIG. 5 is a schematic flow chart of a method for dynamically monitoring a fundamental ring of a wind turbine in an embodiment of the present invention. As shown in fig. 5, a method for dynamically monitoring a wind turbine foundation ring in an embodiment of the present invention may include the following steps:
and 51, presetting a plurality of measuring point positions on a foundation ring of the fan to be monitored.
In the technical scheme of the invention, due to the uncertainty of the wind load of 360 degrees, a dynamic monitoring system of the fan foundation ring needs to be respectively arranged at a plurality of measuring point positions to dynamically monitor the plurality of measuring point positions, so that more comprehensive monitoring data can be obtained. Therefore, in this step, a plurality of site positions may be set in advance on the foundation ring of the wind turbine to be monitored.
For example, as shown in FIG. 4, in a preferred embodiment of the present invention, 4 equidistant measuring point positions can be preset along the whole circumference of the wind turbine foundation ring; a measuring point position (namely the position of the device 1 in the figure 4) is required to be arranged at the position of the fan foundation ring corresponding to the main wind direction, and measuring point positions (namely the positions of the devices 2-4 in the figure 4) are arranged at intervals of 90 degrees.
And step 52, respectively installing the dynamic monitoring system of the fan foundation ring at each measuring point position.
When installing the dynamic monitoring system of above-mentioned fan foundation ring, can be fixed in the flange 13's on the foundation ring of fan lateral wall in the outside of the magnetism fixing support 11 among the dynamic monitoring system, utilize the powerful magnetism of magnetism fixing support 11, be fixed in on the flange lateral wall on the foundation ring, simultaneously, also realized the quick fixed mounting of equipment.
Step 53, before the wind turbine generator runs, obtaining a measured value (L) in an initial state through data obtained by measuring the single-axis inclination angle sensor, the laser displacement sensor and the resistance strain gauge 0 ，θ 0 ，ε 0 ) And using the measured value as an initial valueThe reference value is transmitted to the data processing terminal.
And step 54, after the wind turbine generator starts to operate, acquiring data obtained by measurement in real time through the single-axis inclination angle sensor, the laser displacement sensor and the resistance strain gauge, and transmitting the data obtained by measurement to the data processing terminal through the data acquisition module.
And step 55, the data processing terminal acquires and measures data in real time according to the received initial reference value and the data acquired by the single-axis inclination angle sensor, the laser displacement sensor and the resistance strain gauge, and calculates to acquire the relative vertical displacement and the dynamic elastic deformation of the foundation ring of the fan at the measuring point.
Therefore, through the steps 51-55, the dynamic vertical displacement and the dynamic elastic deformation of the fan foundation ring can be remotely monitored in real time through the dynamic monitoring method of the fan foundation ring.
In addition, as an example, in another preferred embodiment of the present invention, the relative vertical displacement of the foundation ring of the wind turbine at the measuring point can be calculated by the following formula:
d i ＝L i cosθ i -(ε i -ε 0 )H-L 0 cosθ 0 (1)
wherein d is i Is the relative vertical displacement of the fan foundation ring at the measuring point at the moment i, L 0 Is a distance value, epsilon, measured by a laser displacement sensor before the wind turbine generator runs 0 Is a strain value theta measured by a resistance strain gage before the wind turbine generator runs 0 For measuring the inclination angle value L obtained by the single-shaft inclination angle sensor before the wind turbine generator runs i Is a distance value epsilon measured by a laser displacement sensor at a time i after the wind turbine generator starts to operate i The strain value theta measured by the resistance strain gauge at the moment i after the wind turbine generator starts to operate i The inclination angle value measured by the single-shaft inclination angle sensor at the moment i after the wind turbine generator starts to operate is shown, and H is the total height of the foundation ring of the wind turbine.
In addition, as an example, in another preferred embodiment of the present invention, the method for dynamically monitoring the wind turbine foundation ring may further include:
and when the relative vertical displacement calculated by the data processing terminal is greater than a preset displacement threshold value, alarming.
In summary, in the dynamic monitoring system and method of the wind turbine foundation ring, because the single-axis tilt angle sensor, the laser displacement sensor and the resistance strain gauge are arranged in the monitoring system, the corresponding tilt angle value, the distance value from the system to the top surface of the foundation concrete of the wind turbine and the dynamic strain value of the foundation ring under the action of the wind load can be obtained through measurement, and the relative vertical displacement of the foundation ring of the wind turbine at the measuring point and the dynamic elastic deformation of the foundation ring of the wind turbine at the measuring point under the action of the wind load can be respectively obtained through calculation according to the tilt angle value, the distance value and the dynamic strain value, so that the vertical displacement of the foundation ring of the wind turbine can be rapidly, effectively and intuitively monitored and early warned dynamically, thereby effectively saving the manpower and time operation and maintenance cost of the wind power plant, greatly improving the later operation and maintenance efficiency of the wind power plant, and reducing the operation and maintenance cost, the economic benefit is improved, and major safety accidents such as tower collapse are avoided.
In addition, the dynamic monitoring system and the method for the wind turbine foundation ring are simple to operate and high in practicability, can realize real-time monitoring of dynamic vertical displacement of the wind turbine foundation ring, realize fine monitoring and early warning of key positions of the wind turbine foundation, avoid the risk that the foundation ring is separated from foundation concrete or even falls down to the tower, and ensure normal operation of the wind turbine generator.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (9)

1. The utility model provides a dynamic monitoring system of fan foundation ring which characterized in that, this dynamic monitoring system of fan foundation ring includes: the device comprises a leveling bubble, a device box, a single-axis tilt sensor, a laser displacement sensor, a data acquisition module, a device fixing support, a leveling nut, a magnetic fixing support, a laser reflection panel, a resistance strain gauge and a data processing terminal;
the device fixing bracket includes: side plates and a top plate;
the inner side of the magnetic fixed support is fixedly connected with the outer side of the side plate of the device fixing support; the outer side of the magnetic fixed support is fixed on the side wall of a flange on a basic ring of the fan;
the top of the device box is connected with the top plate of the device fixing bracket through a plurality of leveling nuts;
the level bubble is arranged at the top of the device box;
the single-axis tilt angle sensor and the data acquisition module are arranged in the device box;
the laser displacement sensor is arranged at the bottom of the device box;
the single-axis tilt angle sensor and the laser displacement sensor are respectively connected with the data acquisition module through data lines;
the laser reflection panel is arranged on the top surface of the foundation concrete of the fan and corresponds to the laser displacement sensor;
the laser displacement sensor is used for measuring and obtaining a distance value from the laser displacement sensor to the top surface of the foundation concrete;
the resistance strain gauge is arranged on the inner side wall of the base ring of the fan; the resistance strain gauge is connected with the data acquisition module through a data line;
the data acquisition module is connected with the data processing terminal through a data line;
the data processing terminal is used for calculating the relative vertical displacement and the dynamic elastic deformation of the foundation ring of the fan at the measuring point according to the initial reference value, the inclination angle value measured by the single-axis inclination angle sensor, the distance value measured by the laser displacement sensor and the strain value acquired and measured by the resistance strain gauge in real time;
wherein, the relative vertical displacement of the base ring of the fan at the measuring point is calculated by the following formula:
d i = L i cosθ i -（ε i - ε 0 ）H - L 0 cosθ 0 ；
wherein the content of the first and second substances,d i is a time of dayiThe relative vertical displacement of the fan foundation ring at the measuring point,L 0 the distance value measured by the laser displacement sensor before the wind turbine generator runs,ε 0 the strain value is measured by the resistance strain gauge before the wind turbine generator runs,θ 0 the inclination angle value is measured by a single-shaft inclination angle sensor before the wind turbine generator runs,L i at the moment after the wind turbine starts to operateiThe distance value measured by the time laser displacement sensor,ε i at the moment after the wind turbine starts to operateiThe strain value measured by the time resistance strain gauge,θ i at the moment after the wind turbine starts to operateiAnd the inclination angle value measured by the single-shaft inclination angle sensor is H, and the total height of the foundation ring of the fan is H.
2. The wind turbine foundation ring dynamic monitoring system of claim 1, further comprising: an interactive display interface;
the interactive display interface is arranged on the side surface of the device box and is connected with the data acquisition module;
and the interactive display interface is used for synchronously displaying corresponding data of the dynamic monitoring system of the fan foundation ring and setting the sampling frequency of the single-axis tilt angle sensor and the laser displacement sensor through the interactive display interface.
3. The wind turbine foundation ring dynamic monitoring system of claim 1, further comprising: a power interface and a data transmission interface;
one end of the power supply interface is respectively connected with the single-shaft tilt angle sensor and the laser displacement sensor, and the other end of the power supply interface is connected with an external power supply;
one end of the data transmission interface is respectively connected with the single-axis tilt sensor, the laser displacement sensor and the resistance strain gauge, and the other end of the data transmission interface is connected with the data processing terminal.
4. The wind turbine foundation ring dynamic monitoring system of claim 1, further comprising: an alarm;
the data processing terminal is further used for sending an alarm instruction to the alarm when the calculated relative vertical displacement is larger than a preset displacement threshold;
and the alarm is used for giving an alarm according to the alarm instruction.
5. The wind turbine foundation ring dynamic monitoring system of claim 1, wherein:
the laser reflection panel is fixed on the top surface of the foundation concrete of the fan through anchor bolts.
6. The wind turbine foundation ring dynamic monitoring system of claim 1, wherein:
the sampling frequency of the single-axis tilt sensor, the laser displacement sensor and the resistance strain gauge is preset, and the sampling frequency of the single-axis tilt sensor, the sampling frequency of the laser displacement sensor and the sampling frequency of the resistance strain gauge are consistent.
7. The wind turbine foundation ring dynamic monitoring system of claim 6, wherein:
the sampling frequency is 5 acquisitions per second.
8. A dynamic monitoring method for a fan foundation ring is characterized by comprising the following steps:
presetting a plurality of measuring point positions on a foundation ring of a fan to be monitored;
a dynamic monitoring system of the fan foundation ring as claimed in any one of claims 1 to 7 is respectively installed at each measuring point position;
before the wind turbine generator runs, obtaining a measured value in an initial state through data obtained by measuring a single-axis inclination angle sensor, a laser displacement sensor and a resistance strain gauge, and transmitting the measured value serving as an initial reference value to a data processing terminal;
after the wind turbine generator starts to operate, acquiring measured data in real time through a single-axis inclination angle sensor, a laser displacement sensor and a resistance strain gauge, and transmitting the measured data to a data processing terminal through a data acquisition module;
the data processing terminal calculates and obtains the relative vertical displacement and the dynamic elastic deformation of the foundation ring of the fan at the measuring point according to the received initial reference value, the dip angle value measured by the single-axis dip angle sensor, the distance value measured by the laser displacement sensor and the strain value acquired and measured by the resistance strain gauge in real time;
the relative vertical displacement of the foundation ring of the fan at a measuring point is calculated by the following formula:
d i = L i cosθ i -（ε i - ε 0 ）H - L 0 cosθ 0 ；
wherein the content of the first and second substances,d i is a time of dayiThe relative vertical displacement of the fan foundation ring at the measuring point,L 0 the distance value measured by the laser displacement sensor before the wind turbine generator runs,ε 0 the strain value is measured by a resistance strain gage before the wind turbine generator runs,θ 0 the inclination angle value measured by the single-shaft inclination angle sensor before the wind turbine generator runs,L i at the moment after the wind turbine starts to operateiThe distance value measured by the time laser displacement sensor,ε i at the moment after the wind turbine starts to operateiThe strain value measured by the time resistance strain gauge,θ i at the moment after the wind turbine starts to operateiAnd the inclination angle value obtained by the measurement of the single-shaft inclination angle sensor is H, and the total height of the foundation ring of the fan is H.
9. The method for dynamically monitoring a wind turbine foundation ring as recited in claim 8, further comprising:
and when the relative vertical displacement calculated by the data processing terminal is greater than a preset displacement threshold value, alarming.
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