WO2015046651A1

WO2015046651A1 - Measurement apparatus and measurement method for center of gravity of blade for wind power generator

Info

Publication number: WO2015046651A1
Application number: PCT/KR2013/008719
Authority: WO
Inventors: 김철수; 전용준; 홍근빈; 김종현; 김기영; 김선영
Original assignee: 주식회사 케이티이엔지
Priority date: 2013-09-27
Filing date: 2013-09-30
Publication date: 2015-04-02

Abstract

The present invention relates to a measurement apparatus and a measurement method for the center of gravity of a blade for a wind power generator. The measurement apparatus comprises first and second weight measurement units, a distance measurement unit, and a controller. The first weight measurement unit has a root part of the blade seated thereon to measure the weight of the root part. The second weight measurement unit is placed to be spaced apart from the first weight measurement unit and has a tip part of the blade seated thereon to measure the weight of the tip part. The distance measurement unit measures a distance between an edge position of the root part and a weight measurement intermediate position of the root part and a distance between the weight measurement intermediate position of the root part and a weight measurement intermediate position of the tip part. The controller calculates the center of gravity of the blade on the basis of the measured weight data and the measured distance data.

Description

Center of gravity measuring device and measuring method of wind turbine blade

The present invention relates to an apparatus and method for measuring the center of gravity of a blade used in a wind turbine.

Recently, the importance and the importance of renewable energy are increasing due to the deepening of climate change problem and the depletion of fossil fuel. Renewable energy refers to energy used by converting existing fossil fuels or by converting renewable energy including sunlight, water, geothermal, precipitation, and bioorganisms.

New energy is divided into fuel cell, coal liquefaction gas, heavy residue oil gasification, and hydrogen energy. Renewable energy is divided into solar, solar, bio, wind, hydro, marine, waste, and geothermal fields. Among renewable energy sources, wind power is recognized as the most competitive energy source.

Wind power generators are changing from onshore wind power generators to offshore wind power generators of 5MW or more due to securing installation locations and environmental issues. In the case of offshore wind power generators, regular maintenance is performed every six months. However, due to the difficulty in securing weather conditions and transportation means, it is difficult to quickly perform maintenance.

Generally, a wind turbine includes a rotor, a transmission, and a generator. The rotor is rotated by wind power. For example, the rotor may have three blades arranged at regular intervals around the hub, and each root portion of the blades may be fixed to the hub. And, the hub may be connected to the rotating shaft. The transmission receives the rotational force of the rotor through the rotating shaft, and increases the rotational speed required by the power generator. The generator converts the mechanical energy received through the transmission into electrical energy.

On the other hand, because the blade manufacturing technology is relatively labor-intensive, it is difficult to manufacture a homogeneous blade. Therefore, there may be a case where the center of gravity of some of the three blades provided in one rotor does not meet the tolerance range. In this case, the center of gravity balance between the blades is not achieved, which can generate a considerable amount of vibration on the rotating shaft.

As a result, when the wind turbine is operated for a long time, the structure supporting the rotating shaft may be overloaded, which may cause a failure of the wind turbine. In particular, in order to increase the power generation capacity of the wind turbine, the blade is increasing in size, the above-mentioned problem may be more serious. In addition, if the wind turbine fails, repair work must be performed, which can be difficult for offshore wind turbines. Therefore, before installing the blades in the wind turbine, there is a need for a method for accurately measuring the center of gravity of the blade.

An object of the present invention is to provide an apparatus for measuring the center of gravity of a blade for a wind turbine and a measuring method capable of accurately measuring the center of gravity of each blade before mounting the blades to the wind turbine.

An apparatus for measuring the center of gravity of a wind turbine blade according to the present invention for achieving the above object includes a first weighing unit, a second weighing unit, a distance measuring unit, and a controller. The first weighing unit measures the weight of the root by seating the root of the blade. The second weighing unit is disposed spaced apart from the first weighing unit, and measures the weight of the tip by seating the tip of the blade. The distance measuring unit measures the distance between the edge position of the root portion and the weighing intermediate position of the root portion and the distance between the weighing intermediate position of the root portion and the weighing intermediate position of the tip portion. The controller calculates the center of gravity of the blade based on the weight data measured from the first and second weighing units and the distance data measured from the distance measuring unit.

The method for measuring the center of gravity of a blade for a wind turbine according to the present invention includes mounting the root and tip of the blade to the first and second weighing units, respectively. Then, by adjusting the height of any one of the root portion and the tip portion seated on the first and second weighing units, the edge of the root portion is positioned on a vertical line. Then, the distance between the edge position of the root portion and the weighing intermediate position of the root portion and the distance between the weighing intermediate position of the root portion and the weighing intermediate position of the tip portion are measured. Then, the weight of the root portion and the tip portion of the first and the second weighing unit, respectively, are measured. The center of gravity of the blade is then calculated based on the measured weight and distance data.

According to the present invention, since the center of gravity of each blade can be accurately measured before mounting the blades in the wind turbine, it is possible to check whether the center of gravity of each blade meets the tolerance range. In addition, it is possible to check whether the respective weights of the root and tip of the blade meet the tolerance range. Therefore, since the center of gravity and the blades to which the weight meets the tolerance range can be combined and mounted in one rotor, there is an effect that can prevent the failure due to the center of gravity and the weight imbalance between the blades in advance.

1 is a perspective view of an apparatus for measuring the center of gravity of a blade for a wind turbine according to an embodiment of the present invention.

2 is a block diagram of the measuring apparatus shown in FIG.

3 is a diagram illustrating an example of a blade.

FIG. 4 is a perspective view illustrating a root portion of a blade seated in the first seating portion in FIG. 1.

FIG. 5 is a front view illustrating a state in which the first moving table is fixed to the ground in FIG. 1.

6 is a front view illustrating a state in which the second moving table is fixed to the ground in FIG. 1.

7 to 10 are views for explaining a method for measuring the center of gravity of the blade for a wind turbine according to an embodiment of the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view of a device for measuring the center of gravity of the blade for a wind turbine. 2 is a block diagram of the measuring apparatus shown in FIG. 3 is a diagram illustrating an example of a blade.

1 to 3, the center of gravity measuring apparatus 100 of the wind turbine blade includes a first weighing unit 110, a second weighing unit 120, a distance measuring unit 130, and Includes a controller 140. Here, the wind turbine blade 10 has a length from the other side of the central body portion 11, the root portion 12 extending in the longitudinal direction from one side of the central body portion 11, and the central body portion (11). It may include a tip portion 13 extending in the direction. The root portion 12 may be coupled to the hub of the rotor and fixed. The root portion 12 may have a structure in which a plurality of coupling pins 12a are arranged along the circumferential direction and protrude in the longitudinal direction, respectively.

The first weighing unit 110 measures the weight of the root portion 12 by mounting the root portion 12 of the blade 10. For example, the first weighing unit 110 may include a first moving table 111, a first weighing unit 112, a first seating unit 113, a first height adjusting unit 114, and a first 1 may include a horizontal sensing unit 115. The first movable table 111 is movable on the ground. The plurality of wheels 111a may be mounted on the lower side of the first moving table 111 to facilitate movement. The first weighing unit 112 is installed on the first moving table 111 to measure the weight of the root unit 12. The first weighing unit 112 may include a load cell for measuring the weight. In addition, the first weighing unit 112 may provide the weight data measured by the load cell to the controller 140.

The first seating portion 113 is for stably mounting the root portion 12 on the first weighing portion 112. Referring to FIG. 4 along with FIG. 1, the first seating part 113 may include a seating member 1131 and a pair of support rollers 1132. The seating member 1131 may be mounted to an upper surface of the first weighing unit 112 to support a center portion of the lower surface of the root portion 12. In addition, the mounting member 1131 may have an insertion groove 1131a into which one of the coupling pins 12a of the root part 12 is inserted.

The support rollers 1132 support both portions of the root portion 12. The support rollers 1132 may be rotatably coupled to brackets mounted on the upper surface of the first weighing unit 112. Here, when the root portion 12 is lowered and seated on the seating member 1131, the support rollers 1132 may be disposed to rotate while being in contact with both portions of the root portion 12, respectively. In the state where the root portion 12 is seated on the seating member 1131, the support rollers 1132 may be stopped by a brake, thereby supporting the root portion 12 more stably. Each rolling surface of the support rollers 1132 may be coated with a urethane material or the like for preventing or cushioning the surface of the root portion 12.

The first height adjusting unit 114 is for adjusting the height of the first moving table 111. The first height adjustment unit 114 may include four hydraulic cylinders. The hydraulic cylinders may be divided into two on both sides of the first movable table 111 facing each other. Each hydraulic cylinder may be fixed to the side of the first movable table 111 in a state where the cylinder rod is arranged to extend downward from the cylinder body. The bottom of the cylinder rod may be equipped with a scaffold.

If the scaffold of each cylinder rod continues to extend in contact with the ground, as shown in FIG. 5, the first movable base 111 may be fixed to the ground so that it is not horizontally moved by being lifted from the ground. In this state, the height of the first movable table 111 may be adjusted by adjusting the extension length of each cylinder rod. When the height of the first movable table 111 is adjusted, the height of the root portion 12 seated on the first seating portion 113 may be adjusted. The hydraulic cylinders can be connected to a manual hydraulic pump and operated manually. Of course, the hydraulic cylinders can also be operated automatically by an automatic hydraulic pump.

The first horizontal sensor 115 detects whether the first weight measuring unit 112 is horizontal. When the height of the first movable base 111 is adjusted by the first height adjusting unit 114, the first horizontal sensing unit 115 is the first weighing unit 112 positioned on the first movable base 111. ) Can be detected horizontally. For example, the first horizontal sensing unit 115 may include at least two levels. The two spirit levels may be installed in two adjacent sides of the first weighing unit 112. As a level, a spirit level or an electronic level may be used. A bubble level is a device configured to measure the inclination of the surface under measurement using bubbles. The electronic level is a device configured to measure and display the inclination of the surface under measurement and output the inclination data as an electric signal.

When the hydraulic cylinders are operated manually, the operator may operate the hydraulic cylinders to level the first weighing unit 112 while visually checking the inclination measured by the spirit level. When the hydraulic cylinders operate automatically, the inclination data measured from the electronic level can be input to the controller 140. The controller 140 may operate the hydraulic cylinders to level the first weighing unit 112 based on the input inclination data.

The first weighing unit 110 may include a vertical sensing unit 116 that detects whether the edge of the root is vertical. When the edges of the root portion 12 are vertical, the center of each edge of the root portion 12 and the tip portion 13 may be located on the horizontal line. Therefore, by detecting whether the edge of the root portion 12 is vertical, it is possible to detect whether the center of each edge of the root portion 12 and the tip portion 13 is located on the horizontal line.

The vertical sensing unit 116 may be made of an electronic level. The vertical sensing unit 116 may be mounted to the vertical mounting unit 1161. The vertical mounting plate 1161 is fitted into and fixed to some of the coupling pins 12a of the root portion 12, and may be configured to be separated from the fixed state. As shown in FIG. 4, in a state where the root portion 12 is seated on the first seating portion 113, the vertical mounting stand 1161 is fitted and fixed to some of the coupling pins 12a of the root portion 12. Can be. When the root portion 12 is inclined as the height of the tip portion 13 is adjusted, the vertical mount 1161 may be inclined with the root portion 12. In this case, the vertical sensing unit 116 may measure the inclination of the vertical mounting table 1161 and provide the measured inclination data to the controller 140.

The second weighing unit 120 is disposed spaced apart from the first weighing unit 110. The second weighing unit 120 measures the weight of the tip portion 13 by seating the tip portion 13 of the blade 10. For example, the second weighing unit 120 includes a second moving table 121, a second weighing unit 122, a second seating unit 123, a second height adjusting unit 124, and a second 2 may include a horizontal sensing unit 125. The second moving table 121 is movable on the ground. The plurality of wheels 121a may be mounted on the lower side of the second moving table 121. The second weighing unit 122 is installed on the second moving table 121 to measure the weight of the tip unit 13. The second weighing unit 122 may include a load cell. In addition, the second weighing unit 122 may provide the weight data measured by the load cell to the controller 140.

The second seating part 123 is for stably seating the tip part 13 on the second weighing part 122. For example, the second seating part 123 may include a band member 1231 and a pair of pillar members 1232. The band member 1231 may be formed to wrap and support the lower surface and both sides of the tip portion 13 together. Each of the pillar members 1232 is fixed to the upper surface of the second weighing unit 122. In the state in which the tip portion 13 is seated on the band member 1231, the pillar members 1232 are formed of the band member 1231 so that the center portion of the band member 1231 does not touch the upper surface of the second weighing unit 122. Both ends can be supported. The band member 1231 may be made of a material such as a cloth material. Accordingly, the band member 1231 may be in close contact with the tip 13 to support the tip 13 more stably.

The second height adjusting unit 124 is for adjusting the height of the second moving table 121. The second height adjustment unit 124 may include four hydraulic cylinders. The hydraulic cylinders may be divided into two on both sides of the second moving table 121 facing each other. Each hydraulic cylinder may be fixed to the side of the second moving table 121 in a state where the cylinder rod is arranged to extend downward from the cylinder body. The bottom of the cylinder rod may be equipped with a scaffold.

If the scaffold of each cylinder rod continues to extend in contact with the ground, as shown in FIG. 6, the second movable base 121 may be fixed to the ground so that it is not horizontally moved by being lifted from the ground. In this state, the height of the second moving table 121 may be adjusted by adjusting the extension length of each cylinder rod. When the height of the second moving table 121 is adjusted, the height of the tip portion 13 seated on the second seating portion 123 may be adjusted. The hydraulic cylinders can be operated automatically by an automatic hydraulic pump.

The second horizontal sensing unit 125 detects whether the second weighing unit 122 is horizontal. When the height of the second movable base 121 is adjusted by the second height adjusting unit 124, the second horizontal sensing unit 125 is the second weighing unit 122 positioned on the second movable base 121. ) Can be detected horizontally. For example, the second horizontal sensing unit 125 may include at least two levels. The two spirit levels may be installed in two adjacent sides of the second weighing unit 122. As the level, an electronic level may be used. Inclination data measured from the electronic level may be input to the controller 140. The controller 140 may operate the hydraulic cylinders to level the second weighing unit 122 based on the input tilt data.

Distance measuring unit 130 is the distance between the edge position of the root portion 12 and the weighing intermediate position of the root portion 12, the intermediate weight measurement position of the root portion 12 and the weight measurement intermediate of the tip portion 13 Measure the distance between locations. The weighing intermediate position of the root portion 12 is defined as an intermediate position of the first weighing unit 112, and the weighing intermediate position of the tip unit 13 is defined as an intermediate position of the second weighing unit 122. Can be.

For example, the distance measuring unit 130 may include a first reflecting member 131, a second reflecting member 132, and a distance sensor 133. The first reflecting member 131 is disposed at the edge position of the root portion 12. The first reflecting member 131 may be fixed to the vertical mounting plate 1161. The first reflecting member 131 may be fixed to the first moving table 111. The second reflecting member 132 is disposed at the weighing intermediate position of the tip portion 13. The second reflecting member 132 may be fixed to the second moving table 121. The first and second reflecting

members

131 and 132 may be formed of mirrors or the like, respectively.

The distance sensor 133 may be formed of a laser distance sensor. The distance sensor 133 is rotatably installed about a vertical axis at a weighing intermediate position of the root part 12. The distance sensor 133 may be disposed toward the first reflecting member 131 or the second reflecting member 132 as the measurement part rotates by 180 degrees about the vertical axis. The distance sensor 133 may be rotatably installed around the horizontal axis to adjust the vertical angle of the measurement part.

The distance sensor 133 is a time that is reflected by the first reflecting member 131 after the laser is emitted to the first reflecting member 131 in a state where the measurement portion is disposed toward the first reflecting member 131. By measuring, the distance between the weighing intermediate position of the root portion 12 and the edge position of the root portion 12 can be calculated. In addition, the distance sensor 133 emits a laser to the second reflecting member 132 in a state where the measurement part is disposed toward the second reflecting member 132, and then is reflected by the second reflecting member 132. By measuring the coming time, the distance between the weighing intermediate position of the root portion 12 and the weighing intermediate position of the tip portion 13 can be calculated.

The controller 140 calculates the center of gravity of the blade 10 based on the weight data measured from the first and second

weight measuring units

110 and 120 and the distance data measured from the distance measuring unit 130, respectively. The controller 140 may calculate the center of gravity of the blade 10 by Equation 1 below. Referring to Figure 3 together as follows.

Equation 1

Here, x _cm: the blade center of gravity, m _1: Root parts of weight, m _2: distance between the root portion edge of the root portion weighing intermediate position, x _2:: tip portion weight, x ₁ root portion edge position and It means the distance between the weighing intermediate positions of the tips.

Then, the distance (x ₂ ) between the edge position of the root portion and the intermediate weight measurement position of the tip portion is the distance between the edge position of the root portion and the intermediate weight measurement position of the root portion (x ₁ ) and the weight of the intermediate portion of the root portion and the weight of the tip portion. This can be obtained by adding the distances between the measuring intermediate positions.

On the other hand, the controller 140 adjusts the height of the tip portion 13 by the second height adjusting portion 124 based on the information detected from the vertical sensing portion 116 to fit the edge of the root portion 12 in a vertical state. Can be. The controller 140 may include a first controller 141 and a second controller 142. The first controller 141 outputs a control signal for the second height adjuster based on the information detected by the vertical sensor 116. The first control unit 141 receives the weight data of the root unit 12 measured from the first weight measuring unit 112. The first controller 141 receives the distance data measured by the distance measurer 130.

The second control unit 142 receives the control signal for the second height adjusting unit output from the first control unit 141 and controls the second height adjusting unit 124. In addition, the second control unit 142 transmits the weight data signal of the tip unit 13 measured by the second weighing unit 122 to the first control unit 141. Then, the first controller 141 is the center of gravity of the blade 10 based on the weight data measured from the first and second

weight measuring units

112 and 122 and the distance data measured from the distance measuring unit 130, respectively. Can be calculated.

The first control unit 141 and the second control unit 142 may be connected by wireless communication by a wireless communication unit. The wireless communication unit may include a first wireless communication module 151 and a second wireless communication module 152. The first wireless communication module 151 transmits the control signal for the second height adjusting unit output from the first control unit 141 to the second control unit 142, and the tip portion 13 output from the second control unit 142. The weight data signal is received and transmitted to the first control unit 141. The second wireless communication module 152 transmits the weight data signal of the tip unit 13 output from the second control unit 142 to the first control unit 141, and adjusts the second height output from the first control unit 141. The bouillon control signal is received and transmitted to the second control unit 142. The first and second

wireless communication modules

151 and 152 may be formed of a Bluetooth module or the like.

The process of measuring the center of gravity of the blade 10 by the above-described center of gravity measuring apparatus 100 of the blade for a wind turbine will be described with reference to FIGS. 1 to 10.

First, the root portion 12 and the tip portion 13 of the blade 10 are seated on the first and second

weight measuring units

110 and 120, respectively. In detail, as illustrated in FIG. 7, the first and second

weight measuring units

110 and 120 are moved to positions where the root portion 12 and the tip portion 13 can be seated, respectively. The measuring

parts

112 and 122 correspond to the root part 12 and the tip part 13, respectively. In this case, guide lines may be formed on the ground, and the first and second moving tables 111 and 121 may be arranged side by side at the set position.

Next, as shown in FIG. 8, the first movable table 111 is lifted while being leveled by the first height adjusting unit 114 and fixed to the ground. That is, each cylinder rod of the first height adjusting unit 114 is extended to lift the first moving table 111 by the set height from the ground. Then, the second movable table 121 is lifted while being leveled by the second height adjusting unit 124 and fixed to the ground. That is, each cylinder rod of the second height adjusting unit 124 is extended to lift the second moving table 121 by the set height from the ground. Next, as shown in FIG. 9, the root part 12 is seated on the first seating part 113 and the tip part 13 is seated on the second seating part 123. In this case, the blade 10 may be lowered from the upper side of the first and

second seating parts

113 and 123 by a crane or the like to be seated on the first and

second seating parts

113 and 123.

In a state where the root portion 12 and the tip portion 13 are seated on the first and

second seating portions

113 and 123, the edge of the root portion 12 may not be positioned on a vertical line. Accordingly, the center of each edge of the root portion 12 and the tip portion 13 may not be located on the horizontal line. In this case, as shown in FIG. 10, any one of the root portion 12 and the tip portion 13 seated on the first and second

weight measuring units

110 and 120, for example, adjusts the height of the tip portion 13. Thus, the edge of the root portion 12 is positioned on the vertical line. At this time, the vertical sensing unit 116 detects whether the edge of the root portion 12 is in the vertical state and inputs it to the controller 140. The controller 140 adjusts the height of the tip part 13 by the second height adjusting part 124 based on the information detected by the vertical sensing part 116 to adjust the edge of the root part 12 to the vertical state. In detail, based on the information detected by the vertical sensing unit 116, the first control unit 141 outputs the control signal for the second height adjusting unit and transmits the control signal to the second control unit 142. Then, according to the control signal for the second height adjusting unit received from the first control unit 141, the second height adjusting unit 124 may be controlled by the second control unit 142.

Through this process, the center of each edge of the root portion 12 and the tip portion 13 is positioned on the horizontal line, and then the distance between the edge position of the root portion 12 and the intermediate weight measurement position of the root portion 12, The distance between the weighing intermediate position of the root portion 12 and the weighing intermediate position of the tip portion 13 is measured. At this time, the laser beam is emitted from the distance sensor 133 to the first reflecting member 131 and then the return time reflected by the first reflecting member 131 is measured to measure the intermediate position and the root of the root portion 12. The distance between the edge positions of the part 12 is calculated. Next, after rotating the distance sensor 133 180 degrees about the vertical axis, the laser is emitted from the distance sensor 133 to the second reflecting member 132 and then reflected by the second reflecting member 132 and then turned back. The coming time is measured to calculate the distance between the weighing intermediate position of the root portion 12 and the weighing intermediate position of the tip portion 13.

Then, the weight of the root portion 12 and the weight of the tip portion 13 respectively seated on the first and second

weight measuring units

110 and 120 are measured. Then, the center of gravity of the blade 10 is calculated based on the measured weight data and the distance data. In this case, the weight data of the root portion 12 measured by the first weight measuring unit 112 and the distance data measured by the distance sensor 133 are input to the first control unit 141. Then, the weight data of the tip unit 13 measured by the second weighing unit 122 is input to the second control unit 142 and transmitted to the first control unit 141. Then, the first control unit 141 calculates the center of gravity of the blade 10 by Equation 1 based on the weight data and the distance data.

As described above, since the center of gravity of each blade 10 can be accurately measured before mounting the blades 10 to the wind turbine, it is possible to check whether the center of gravity of each blade 10 satisfies the tolerance range. In addition, it is possible to check whether the respective weights of the root portion 12 and the tip portion 13 of the blade 10 meet the tolerance range. Therefore, since the center of gravity and the blades that meet the weight tolerance range can be combined and mounted in one rotor, it is possible to prevent failure due to the center of gravity and the weight imbalance between the blades.

And, if the center of gravity of the blade is outside the tolerance range, after making a pocket inside the blade, it is possible to correct the center of gravity and weight by adding a mass member. As another example, a buckling prevention member is inserted in the blade portion over the root portion and the tip portion of the blade so as not to cause buckling, that is, entanglement or curling caused by strong heat or moisture. Can be. In this case, the mass member may be attached to the anti-buckling member to correct the center of gravity and weight.

Although the present invention has been described with reference to one embodiment shown in the accompanying drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Could be. Accordingly, the true scope of protection of the invention should be defined only by the appended claims.

Claims

A first weighing unit configured to measure a weight of the root part by seating a root part of a wind turbine blade;

A second weighing unit disposed to be spaced apart from the first weighing unit to measure the weight of the tip by seating the tip of the blade;

A distance measuring unit for measuring a distance between an edge position of the root portion and an intermediate weighing position of the root portion and a distance between an intermediate weighing position of the root portion and an intermediate weighing position of the tip portion; And

A controller for calculating a weight center of the blade based on the weight data measured from the first and second weight measuring units and the distance data measured from the distance measuring unit;

Center of gravity measuring device for a wind turbine blade comprising a.
The method of claim 1,

The first weighing unit,

A first movable table made movable on the ground,

A first weighing unit installed on the first moving table to measure a weight of the root unit;

A first seating part for seating the root part on the first weighing part;

A first height adjusting part for adjusting a height of the first moving table, and

Apparatus for measuring the center of gravity of the blade for a wind turbine, characterized in that it comprises a first horizontal sensing unit for detecting whether the first weighing unit horizontal.
The method of claim 1,

The second weighing unit,

A second moving table made movable on the ground,

A second weighing unit installed on the second moving table to measure the weight of the tip unit;

A second seating part for seating the tip part on the second weighing part;

A second height adjusting part for adjusting a height of the second moving table, and

Apparatus for measuring the center of gravity of the blade for a wind turbine, characterized in that it comprises a second horizontal sensing unit for detecting whether the second weighing unit is horizontal.
The method of claim 3,

The first weighing unit,

A vertical sensing unit for sensing whether the edge of the root is vertical;

The controller,

The center of gravity measuring device of the blade for the wind turbine, characterized in that to adjust the height of the tip portion by the second height adjustment unit based on the information detected from the vertical sensing unit to adjust the edge of the root portion in a vertical state.
The method of claim 4, wherein

The controller,

Outputs a control signal for the second height adjustment unit based on the information detected from the vertical sensing unit, receives weight data of the root unit measured by the first weighing unit, and receives distance data measured from the distance measuring unit. A first control unit; And

A second signal for controlling the second height adjusting part by receiving a control signal for the second height adjusting part output from the first control part, and transmitting a weight data signal of the tip part measured from the second weighing unit to the first control part; Control unit;

Center of gravity measuring device for a wind turbine blade comprising a.
The method of claim 5,

Apparatus for measuring the center of gravity of the blade for a wind turbine, characterized in that it comprises a wireless communication unit for connecting between the first control unit and the second control unit by wireless communication.
The method of claim 1,

The distance measuring unit,

A first reflecting member disposed at an edge of the root portion;

A second reflecting member disposed at a weighing intermediate position of the tip portion; And

It is installed to be rotatable about a vertical axis at the intermediate position of the weighing of the root portion, and after measuring the return time reflected by the first reflecting member after emitting the laser to the first reflecting member, Calculates the distance between the position and the edge position of the root portion, and measures the return time reflected by the second reflecting member after the laser is emitted to the second reflecting member to measure the intermediate position of the weight of the root portion and the tip A distance sensor for calculating a distance between negative weighing intermediate positions;

Center of gravity measuring device for a wind turbine blade comprising a.
Mounting the root and tip portions of the wind turbine blade to the first and second weighing units, respectively;

Positioning an edge of the root portion on a vertical line by adjusting a height of one of the root portion and the tip portion seated on the first and second weighing units;

Measuring a distance between an edge position of the root portion and a weighing intermediate position of the root portion and a distance between a weighing intermediate position of the root portion and a weighing intermediate position of the tip portion;

Measuring the weight of the root portion and the weight of the tip portion respectively seated on the first and second weight measuring units; And

Calculating a center of gravity of the blade based on the measured weight data and distance data;

Center of gravity measurement method of the blade for a wind turbine comprising a.
The method of claim 8,

Seating the root portion and the tip portion to the first and second weighing unit, respectively,

Moving the first and second weighing units to positions where the root and tip portions can be seated, respectively, so as to correspond to the root and tip portions of the first and second weighing units, respectively. and,

Lifting and fixing the first movable table of the first weighing unit in a horizontal state by a first height adjusting unit and fixing it to the ground;

Lifting and fixing the second moving table of the second weighing unit in a horizontal state by a second height adjusting unit and fixing it to the ground; and

And centering the root portion on the first seating portion on the first weighing portion and seating the tip portion on a second seating portion on the second weighing portion. How to measure.
The method of claim 9,

Positioning the edge of the root portion on a vertical line,

Detecting whether an edge of the root portion is vertical by a vertical sensing unit, and

The center of gravity of the blade for the wind turbine, characterized in that the step of adjusting the height of the tip portion by the second height adjustment unit based on the information detected by the vertical sensing unit to adjust the edge of the root portion in a vertical state. How to measure.
The method of claim 10,

Positioning the edge of the root portion on a vertical line,

Outputting a control signal for the second height adjusting unit by the first control unit based on the information detected by the vertical sensing unit and transmitting the control signal to the second control unit; and

And controlling the second height adjustment unit by the second control unit according to the control signal for the second height adjustment unit received from the first control unit.
The method of claim 8,

Measuring the distance,

The distance from the distance sensor rotatably centered on the vertical axis at the intermediate position of the weighing of the root part is emitted from the laser to the first reflecting member disposed at the edge position of the root part and then reflected by the first reflecting member. Measuring and calculating a distance between a weighing intermediate position of the root portion and an edge position of the root portion, and

The distance between the intermediate weight measurement position of the root portion and the intermediate weight measurement position of the tip portion is calculated by measuring the return time reflected by the second reflective member after the laser is emitted from the distance sensor to the second reflective member. Method for measuring the center of gravity of the blade for a wind turbine, characterized in that it comprises a process.
The method of claim 8,

Calculating the center of gravity of the blade,

Weight data of the root portion measured by the first weighing unit of the first weighing unit, distance data between the edge position of the root portion and the weighing intermediate position of the root portion, the intermediate weight measurement position of the root portion and the tip Inputting distance data between negative weighing intermediate positions into a first control unit;

Inputting weight data of the tip portion measured by the second weighing unit of the second weighing unit to a second control unit and transmitting the weight data to the first control unit; and

Comprising the step of calculating the center of gravity of the blade based on the weight data and the distance data by the first control unit.