KR101824103B1 - A fixation jig for legs - Google Patents

A fixation jig for legs Download PDF

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Publication number
KR101824103B1
KR101824103B1 KR1020150167334A KR20150167334A KR101824103B1 KR 101824103 B1 KR101824103 B1 KR 101824103B1 KR 1020150167334 A KR1020150167334 A KR 1020150167334A KR 20150167334 A KR20150167334 A KR 20150167334A KR 101824103 B1 KR101824103 B1 KR 101824103B1
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KR
South Korea
Prior art keywords
rack gear
fixing jig
leg fixing
leg
gear
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KR1020150167334A
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Korean (ko)
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KR20170062019A (en
Inventor
김민정
김성준
차지혜
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삼성중공업 주식회사
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Priority to KR1020150167334A priority Critical patent/KR101824103B1/en
Publication of KR20170062019A publication Critical patent/KR20170062019A/en
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Publication of KR101824103B1 publication Critical patent/KR101824103B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
    • B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
    • E02B17/04—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction
    • E02B17/06—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction for immobilising, e.g. using wedges or clamping rings
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
    • E02B17/04—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction
    • E02B17/08—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction for raising or lowering
    • E02B17/0818—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction for raising or lowering with racks actuated by pinions

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • Studio Devices (AREA)

Abstract

A leg fastening device is provided that is mounted on a platform of a vertical lift-off type offshore structure to secure the platform against a plurality of legs. The leg fixing apparatus includes an image capturing section for capturing a rack gear formed on a cord pipe constituting a plurality of legs, a rack gear identification section for grasping the tooth profile of the rack gear on the basis of the photographed image, And a leg fixing jig driving part for adjusting the position of the leg fixing jig so as to fasten the fixing jig to the rack gear.

Description

A fixation jig for legs}

The present invention relates to a leg fastening device, and more particularly to a leg fastening device for supporting legs of a vertical lift-and-drop type offshore structure.

An offshore structure, particularly a vertical lift platform such as a jack-up jig or a wind turbine, includes legs fixed to the sea floor and is configured to be able to move up and down along the legs. Generally, the legs fixed to the seabed can be formed by skeleton of X brace pipes connecting three or more cord pipes and cord pipes.

To support an offshore structure at sea, the legs secured to the seabed may have a length of, for example, 150 m to 200 m.

Korean Patent No. KR 10-1359647

Since the legs supporting the vertical lifting and lowering platform have a length of 150 m to 200 m, it is difficult to assemble and install them on the platform at once using conventional equipment.

Thus, the legs can be made of, for example, a plurality of legs having a length of 10 to 50 meters, and the plurality of legs can be welded together along their lengthwise direction to form one leg.

In order to ensure the mechanical strength and stability of the legs to be vertically oriented at sea, it is necessary that the legs are designed as, for example, straight lines. In addition, the vertically aligned legs must be firmly supported on the platform after the vertical up and down movement.

An apparatus (hereinafter referred to as a "leg fixing jig") for firmly securing a plurality of legs to a platform generally comprises a hydraulic device having a toothed portion coupled on a respective rack gear formed on a cord pipe of each leg, ≪ / RTI >

Generally, when the toothed portion of the leg fixing jig is engaged with each rack gear, the operator normally aligns the teeth of the leg fixing jig with the position of the toothed portion of the rack gear, and adjusts its position finely.

However, the operation and operation of the leg fixing jig of the operator may increase the workload of the operator and may cause damage to the rack gear or the leg fixing jig due to malfunction of the operator.

Accordingly, an object of the present invention is to provide a vertical lifting / descending type offshore structure including a fixed jig device capable of automatically fixing and releasing the leg fixing jig to a rack gear formed on a cord pipe of a leg.

The problems to be solved by the present invention are not limited to the above-mentioned problems, and other matters not mentioned can be clearly understood by those skilled in the art from the following description.

In order to solve the above-mentioned problems, a leg fixing device installed on a platform of a vertical lift-and-lowering type offshore structure according to an embodiment of the present invention and fixing the platform to a plurality of legs includes: An image capturing section for capturing a rack gear; A rack gear identification unit for recognizing a tooth profile of the rack gear based on the photographed image; And a leg fixing jig driving part for adjusting the position of the leg fixing jig according to the grasped tooth shape of the rack gear to fasten the leg fixing jig to the rack gear.

On the other hand, the image capturing unit is fixed to the upper portion of the leg fixing jig.

The rack gear identification unit identifies the distance between the gear teeth provided in the rack gear and the distance from the reference point of the picked-up image to the specific gear gear in the photographed image.

On the other hand, a horizontal distance between the leg fixing jig and the rack gear is checked from an interval between the gear teeth on the photographed image, and based on the distance between the reference point and the specific gear mountain, And a relative position confirmation unit for confirming a vertical distance deviation between the mountains.

The apparatus may further include a position adjusting signal transmitter for transmitting a position adjusting signal for moving the leg fixing jig in the horizontal and vertical directions to the leg fixing jig driving unit based on the determined horizontal distance and the vertical distance deviation.

Other specific details of the invention are included in the detailed description and drawings.

FIG. 1 is an exemplary view schematically showing an offshore structure according to an embodiment of the present invention.
2 is a perspective view illustrating a portion of one leg of a vertical lift-and-lift type offshore structure according to an embodiment of the present invention.
3 is a cross-sectional view that schematically illustrates a view of a leg support and a movement device capable of supporting and moving one leg relative to a platform in accordance with one embodiment of the present invention.
FIG. 4 is a longitudinal sectional view schematically showing a state of a leg supporting and moving apparatus capable of supporting and moving one leg with respect to a platform according to an embodiment of the present invention; FIG.
5 is a block diagram showing a functional configuration of a leg fixing apparatus according to an embodiment of the present invention.
6 is an enlarged partial cross-sectional view of a leg fixing jig equipped with an image capturing unit of the leg fixing apparatus according to an embodiment of the present invention.
Fig. 7 is a partial cross-sectional view schematically showing an image of a rack gear obtained by a leg fixing jig equipped with an image acquiring unit of a leg fixing apparatus according to an embodiment of the present invention. Fig.
8 shows a photographed image of an exemplary rack gear acquired in the image acquisition section.
Fig. 9 is a spectral graph showing the tooth profile of the rack gear identified from the captured image.
10 is a flowchart showing a leg fixing method using a leg fixing apparatus according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and the manner of achieving them, will be apparent from and elucidated with reference to the embodiments described hereinafter in conjunction with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

Unless defined otherwise, all terms (including technical and scientific terms) used herein may be used in a sense commonly understood by one of ordinary skill in the art to which this invention belongs. Also, commonly used predefined terms are not ideally or excessively interpreted unless explicitly defined otherwise.

Also, terms used herein are for the purpose of illustrating embodiments and are not intended to limit the invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. It should be understood that the terms comprising and / or comprising the terms used in the specification do not exclude the presence or addition of one or more other elements, steps and / or operations in addition to the stated elements, steps and / use. And "and / or" include each and any combination of one or more of the mentioned items.

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

1 is an exemplary view schematically showing a jack-up league as an example of a vertical lift-down type offshore structure.

1, a jack-up rig 1 according to an embodiment of the present invention is illustrated as a vertical lift-down type offshore structure according to an embodiment of the present invention. The jack-up rig according to an embodiment of the present invention includes a derrick 10, a plurality of legs 20 And a platform 30.

The plurality of legs 20 may be upright legs, one end of which is fixed to the seabed surface 50 and the other end is exposed to the outside of the ocean 40. The plurality of legs 20 may have a truss structure in which a plurality of pipes form a skeleton thereof. A sprue can 22 can be disposed at one end of the plurality of legs 20 and the plurality of legs 20 and the sea floor surface 50 can be stably fixed through the sprue can. The seabed surface 50 may be 150 to 200 m deep from the surface of the ocean 40.

Vertical elevated platforms, such as jack-up rigs, are typically installed in the ocean with a depth of 150 m to 200 m, so that the legs should be at least 150 m to 200 m long. Since legs having such lengths are difficult to carry and to install in the ocean, generally installed legs are, for example, a plurality of legs having a length of 10 to 50 meters, .

The platform 30 can be connected to a plurality of legs 20 and is capable of ascending and descending along a plurality of legs 20. The level of the platform 30 can be adjusted so as to be spaced apart from the surface of the ocean by a certain distance, whereby the platform 30 can be stably maintained without being affected by waves, tides, etc. on the surface of the ocean.

The derrick 10 is disposed at one side of the platform 30 and is used to drill equipment that drill the seabed 50 into the lower portion of the derrick 10, such as boreholes, drill bits, risers, Can be performed.

2 is a perspective view illustrating a portion of one leg of a vertical lift-and-lift type offshore structure according to an embodiment of the present invention.

Referring to FIG. 2, in one embodiment of the present invention, one leg 20 may be a truss structure forming a triangular pillar. One leg may include three cord pipes 22 extending parallel to one another and brace pipes 26 connecting and supporting each cord pipe 22. [

Each cord pipe 22 may include two rack gears 24 formed along the length of each cord pipe 22.

The two rack gears 24 can be installed to extend in the opposite directions about one cord pipe 22 and extend along the length of the cord pipe 22 and form, for example, I.e., in the direction perpendicular to the direction of each cord pipe 22 from the center of the legs.

Although the positional relationship of the rack gears of the cord pipe 22 with respect to the triangular prismatic leg according to the embodiment of the present invention has been described above, the present invention is not limited thereto. In other embodiments of the invention, the shape of the legs may be a polygonal or polygonal column, including quadrangular columns and pentagonal columns.

3 is a cross-sectional view that schematically illustrates a view of a leg support and a movement device capable of supporting and moving one leg relative to a platform in accordance with one embodiment of the present invention.

FIG. 4 is a longitudinal sectional view schematically showing a state of a leg supporting and moving apparatus capable of supporting and moving one leg with respect to a platform according to an embodiment of the present invention; FIG.

3 to 4, a leg supporting and moving apparatus 100 according to an embodiment of the present invention supports one leg 20 and supports one leg 20 in a vertical direction That is to say in the direction perpendicular to the sea level, and can move the platform 30 up and down with respect to the legs 20 after the legs 20 are secured to the seabed.

In addition, the leg support and movement device 100 may be provided to correspond to the number and position of each cord pipe 22 of one leg 20. That is, as illustrated, when the legs have three cord pipes 22 to form a triangular pillar truss structure, the three leg support and movement devices 100 are configured to wrap at least a portion of each cord pipe 22 .

The leg supporting and moving device 100 according to an embodiment of the present invention may also include a body 101 that can be inserted and fixed in the platform through the platform 30 and surround at least a portion of the cord pipe 22, A first pinion gear driving unit 120 and a first leg fixing jig driving unit 134 and a second leg fixing jig driving unit 144 installed in the body 101. The first pinion gear driving unit 110,

The body 101 is a space formed inside the body 101 and includes a leg accommodating portion 102 in which the cord pipe 22 is accommodated, two leg portions 102 disposed on both sides of the leg accommodating portion 102, And a first pinion gear accommodating portion and a second pinion gear accommodating portion for accommodating the first pinion gear 112 and the second pinion gear 122 interlocked with the rack gear 24, respectively.

The body may have a groove recessed in a " C " shape, and this groove may correspond to the leg accommodating portion 102. The body 101 may be formed to have an opening that is not interfered with the brace pipe 26. In this case, have.

Grooves recessed in a " C " shape in which the first pinion gear 112 and the second pinion gear 122 can be respectively received can be formed on both sides of the leg accommodating portion 102, 1 pinion gear receiving portion and the second pinion gear receiving portion.

The first pinion gear 112 and the second pinion gear 122 may be respectively disposed in the first pinion gear receiving portion and the second pinion gear receiving portion, And the second pinion gear 122 can be rack-and-pinion-coupled to the other rack gear. The first pinion gear 112 and the second pinion gear 122 are disposed in the first pinion gear receiving portion and the second pinion gear receiving portion, respectively, so that damage due to external force can be minimized. The first pinion gear 112 and the second pinion gear 122 are connected to the first pinion gear drive unit 110 and the second pinion gear drive unit 120, respectively, And may be connected through a connection portion 124.

The first pinion gear driving unit 110 and the second pinion gear driving unit 120 may be driving units capable of providing rotational power to the first pinion gear 112 and the second pinion gear 122, , An electric motor, or a hydraulic motor.

The first pinion gear drive unit 110 and the second pinion gear drive unit 120 can rotate the first pinion gear 112 and the second pinion gear 122, respectively, Rack-and-pinion-coupled rake gears 24 respectively on the second pinion gear 122 are mounted on a platform with a relative motion to the leg support and movement device 100, more specifically a platform on which the leg movement and support device 100 is fixedly coupled The plurality of legs 20 may be translationally moved vertically or vertically with respect to each other.

The first leg fixing jig driving part 134 and the second leg fixing jig driving part 144 may be disposed adjacent to the respective rack gears 24 on both sides of one cord pipe 22. [ The first leg fixing jig driving part 134 and the second leg fixing jig driving part 144 are connected to the first leg fixing jig 130 and the second leg fixing jig driving part 144 through the first jig connecting rod 132 and the second jig connecting rod 142, And the first jig connecting rod 132 and the second jig connecting rod 142 are pushed or pulled toward the adjacent cord pipe 22 so that the first leg fixing jig 130 and the second jig connecting rod 142 The two leg fixing jigs 140 can be engaged or disengaged with the rack gears 24 provided on the cord pipe 22. [ The first leg fixing jig driving part 134 and the second leg fixing jig driving part 144 may be, for example, a hydraulic or pneumatic cylinder liner or a linear motor.

The legs 20 can be rigidly supported on the leg support support and movement device 100 so that the leg support and movement device 100 is secured The platform 30 to be installed can be supported and fixed by the legs 20.

The first image capturing unit 200 may be installed on the first leg fixing jig 130 and the second image capturing unit 202 may be installed on the second leg fixing jig 1402. Each of the image capturing units can be directed toward the adjacent rack gear 24 and can take images of the rack gear.

The leg fixing jigs and the leg fixing jig driving portions can be disposed below the first pinion gear 112 and the second pinion gear 122 in a state where the leg supporting and moving apparatus 100 is installed on the platform 30. [ And a lower guide 150 is installed under the leg fixing jigs and the leg fixing jig driving parts to support the vertical alignment of the legs.

In the illustrated embodiment, the leg support and movement device 100 incorporates a leg moving device that moves the legs 20 relative to the platform 30 and a leg support device or leg locking device that holds the legs against the platform Lt; / RTI > However, the leg locking apparatus according to an exemplary embodiment of the present invention may be a separate apparatus that is different from the leg moving apparatus. Hereinafter, only the leg locking apparatus will be described, and its function and configuration will be described in more detail.

5 is a block diagram showing a functional configuration of a leg fixing apparatus according to an embodiment of the present invention.

Referring to FIG. 5, the leg fixing apparatus according to an embodiment of the present invention may include image capturing units 200 and 202, a control unit 510, and leg fixing jig driving units 134 and 144.

The image acquisition units 200 and 202 can acquire images of the rack gear 24 formed in the code pipe 22 and can be, for example, a combination of a light source and a camera or a laser vision system.

The image capturing units 200 and 202 may be attached to be fixed to the leg fixing apparatus and fixedly disposed on the leg fixing jig, for example.

The images acquired by the image acquisition units 200 and 202 can be transmitted to the control unit 510. [ The image acquisition units 200 and 202 can transmit the image data acquired by the wireless communication or the wired communication to the control unit 510. [

The control unit 510 may include a rack gear identification unit 512, a relative position determination unit 514, and a position adjustment signal transmission unit 516.

The rack gear identification unit 512 can receive the image photographed from the image acquisition units 200 and 202 and grasp the tooth profile of the rack gear 24 formed in the code pipe 22 constituting the plurality of legs 20 .

For example, the rack gear identification unit 512 can determine the distance between the gear teeth of the rack gear 24 or the distance from the reference point of the pickup image to one gear tooth in the photographed image. In this case, the reference point of the photographed image may be, for example, a center line bisecting the photographed image. However, the present invention is not limited thereto. The reference point may be a position of the image acquisition units 200 and 202 May be a hypothetical line that is set to specify < RTI ID = 0.0 >

The relative position confirmation unit 514 determines the relative position between the leg fixing jig and the rack gear from the distance between the gear ranks of the rack gear identified from the rack gear identification unit 512 or the distance from the reference point of the captured image to one gear mountain .

For example, the relative position check unit 514 can check the horizontal distance between the rack 200 and the image capturing units 200 and 202 mounted on the leg fixing jig from the interval between the gear teeth of the rack gear on the photographed image Thus, it is possible to confirm the horizontal distance between the leg fixing jig to which the image capturing units 200 and 202 are fixed and the rack gear.

More specifically, as the number of gear meshes in the photographed image is larger, that is, the interval between the gear meshes of the photographed image is shorter, the horizontal distance between the image capturing units 200 and 202 and the rack gear is further confirmed The shorter the distance between the image pickup units 200 and 202 and the rack gear is, the closer the distance between the image pickup units 200 and 202 and the rack gear becomes closer to each other ≪ / RTI >

Accordingly, the relative position determining unit 514 determines the horizontal distance between the image capturing units 200 and 202 and the rack gear according to the interval between the rack gear ridges of the photographed image, from a look-up table storing them or a calculation formula for calculating them .

The relative position determination unit 514 can confirm the difference in distance between the gear position of the at least one rack gear and the reference point or the reference line and thereby determine whether the image acquisition units 200, You can see the vertical distance deviations between the gear teeth of the gears.

The position adjustment signal transmission unit 516 transmits the vertical distance between the leg fixing jigs 130 and 140 and the rack gear 24 or the vertical distance between the leg fixing jigs 130 and 140 and the gear rims of the rack gear 24 And may transmit the position adjustment signal corresponding to the received information to the leg fixing jig driving unit.

The leg fixing jig driving units 134 and 144 can move the leg fixing jigs 130 and 140 in the horizontal and vertical directions in accordance with the received position adjusting signal and the gears of the rack gear 24 and the leg fixing jig 130 The leg fixing jigs 130 and 140 can be coupled to the rack gear 24 without malfunctioning between the teeth formed on the legs 140. [

6 is an enlarged partial cross-sectional view of a leg fixing jig equipped with an image capturing unit of the leg fixing apparatus according to an embodiment of the present invention.

Fig. 7 is a partial cross-sectional view schematically showing an image of a rack gear obtained by a leg fixing jig equipped with an image acquiring unit of a leg fixing apparatus according to an embodiment of the present invention. Fig.

6 and 7, the image capturing units 200 and 202 of the leg fixing apparatus according to the embodiment of the present invention may be fixedly mounted on the leg fixing jigs 130 and 140, respectively.

That is, the image acquisition units 200 and 202 may move together with the leg fixing jigs 130 and 140, respectively, and may have a predetermined relative position with respect to the respective leg fixing jigs 130 and 140.

Jig connection rods 132 and 142 may be connected to one side of each of the leg fixing jigs 130 and 140 and a tooth portion may be formed on the other side of the leg fixing jig 130 and 140. [ The teeth can be arranged to face one rack gear. They may be moved in the horizontal direction D2 so as to engage the gear teeth with the rack gear 24 and may be moved in the vertical direction D1 in order to engage the gear teeth of the gear teeth with the rack gear.

As shown in Fig. 7, before the one leg fixing jig 202 is engaged with the rack gear 24, the image acquiring unit 202 can photograph the adjacent rack gear. The leg fixing jig can be moved in the vertical direction (D1) and the horizontal direction (D2) based on the photographed image, and the teeth of the leg fixing jig can be engaged with the rack gear without malocclusion.

8 shows a photographed image of an exemplary rack gear acquired in the image acquisition section.

Fig. 9 is a spectral graph showing the tooth profile of the rack gear identified from the captured image.

8, image capturing units 200 and 202, such as, for example, a laser vision system, can produce an image of the appearance of the rack gear 24, It is possible to acquire images having different shades or light intensities depending on the height difference protruding in the horizontal direction.

For example, as illustrated in FIG. 8, in the photographed image, the gear ridge (recess) of the rack gear may appear relatively to the arm portion, and the gear ridge (ridge portion) of the rack gear may appear relatively on the list. However, depending on the selected system, the dark area and the dark area may be reversed.

The rack gear identification unit 512 identifies the captured image by a spatial frequency analysis, for example, by determining the amount of change in brightness or the amount of spectrum per length in the vertical axis direction of the shown image, And the distance deviation between one thread and the reference point.

Referring to Fig. 9, the image shown in Fig. 8 can show a light intensity variation or spectral intensity variation which increases and decreases in the longitudinal direction (z) of the rack gear.

Here, the period of the fluctuation of the spectral intensity may correspond to the distance between the two threads, and if the horizontal distance between the image capturing units 200 and 202 and the rack gear is increased (if distant) , And the period will increase if the horizontal distance between the image acquisition units 200 and 202 and the rack gear is reduced (closer). That is, the fluctuation period of the spectral intensity shown in FIG. 9 can be increased or decreased according to the horizontal distance between the image acquisition units 200 and 202 and the rack gear.

Since the distance between the gear ranks of the rack gear has a designed value, i.e., a predetermined value, by comparing the variation period of the spectral intensity identified from the photographed image with the distance (or period due to the gap) between the gear ranks of the predetermined rack gear The distance between the image acquisition units 200 and 202 and the rack gear can be determined.

Further, the distance deviation between one leading end of the spectrum intensity and the reference point can be identified by a vertical distance deviation between the teeth of the leg fixing jig and the teeth of the rack gear. Here, the reference point can be understood as a hypothetical line in which one tip portion of the spectrum intensity is located when the teeth of the leg fixing jig and the teeth of the rack gear are tightly coupled with each other.

In one embodiment of the present invention, the control unit 510 can identify the horizontal distance or the vertical distance deviation between the leg fixing jig and the rack gear, and move the leg fixing jig horizontally and vertically, Lt; / RTI >

More specifically, the control unit 510 can calculate the vertical movement distance of the leg fixing jig for eliminating the corresponding deviation using both the horizontal distance and the vertical distance deviation between the identified leg fixing jig and the rack gear. That is, if the horizontal distance between the leg fixing jig and the rack gear is long, the vertical distance deviation of the leg fixing jig identified from the photographed image will be correspondingly large. Accordingly, the controller 510 reflects the compensation value regarding the vertical distance deviation from the photographed image according to the horizontal distance between the leg fixing jig and the rack gear, and the difference in the vertical distance deviation between the actual leg fixing jig and the gear rims of the rack gear Or a discriminant expression or a lookup table including the discriminant.

10 is a flowchart showing a leg fixing method using a leg fixing apparatus according to an embodiment of the present invention.

Referring to Fig. 10, first, the image capturing units 200 and 202 capture an image of the rack gear to acquire an image related to the tooth profile of the rack gear (S10).

Next, the rack gear identification unit 512 receives the photographed image from the image acquisition units 200 and 202 and reads the image (S20).

Next, the rack gear identification unit 512 checks the deviation of the spectral intensity change period and the reference point from the photographed image (S30).

Then, it is determined whether the deviation is 0 (S40).

If the deviation is not 0, the position adjustment signal transmission unit 516 can move the leg fixing jig in accordance with such deviation.

After the movement of the leg fixing jig, the image acquisition step (S10) can be performed again.

If the deviation is not 0, the position adjustment signal generator may transmit a fixed signal to the leg fixing jig driving units 134 and 144, and the leg fixing jig driving units 134 and 144 horizontally move the leg fixing jig, The fixing jig can be fastened to the rack gear without malocclusion.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, You will understand. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

20: Leg 24: Rack gear
200, 202: image acquisition unit 510:
134, 144: Leg fixing jig driving part

Claims (5)

A leg fastening device mounted on a platform of an offshore structure for securing said platform to a leg,
An image capturing section for capturing a rack gear formed on a cord pipe constituting the leg;
A rack gear identification unit for recognizing a tooth profile of the rack gear based on the photographed image;
A leg fixing jig driving unit for adjusting a vertical position of the leg fixing jig so that a tooth portion of the leg fixing jig is engaged with the rack gear according to a detected tooth profile of the rack gear to fasten the leg fixing jig to the rack gear;
And checking the horizontal distance between the leg fixing jig and the rack gear based on an interval between gear teeth of the rack gear included in the photographed image, A relative position confirming unit for confirming a vertical distance deviation between the gear teeth of the leg fixing jig and the rack gear with reference to a vertical distance; And
And a position adjusting signal transmitter for transmitting a position adjusting signal for moving the leg fixing jig to the leg fixing jig driving unit by a vertical movement distance for eliminating the vertical distance deviation. The method according to claim 1,
And the image capturing unit is fixed to an upper portion of the leg fixing jig. The method according to claim 1,
Wherein the rack gear identification part identifies a distance between a gear tooth provided in the rack gear and a distance from the reference point to a specific gear mountain in the photographed image. delete delete
KR1020150167334A 2015-11-27 2015-11-27 A fixation jig for legs KR101824103B1 (en)

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Publication number Priority date Publication date Assignee Title
KR20190123006A (en) 2018-04-23 2019-10-31 삼보씨엠씨 주식회사 breaking device of jack up rig

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JP2015505950A (en) * 2011-11-30 2015-02-26 株式会社ニコン Shape measuring apparatus, structure manufacturing system, shape measuring method, structure manufacturing method, shape measuring program, and non-transitory computer readable medium

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015505950A (en) * 2011-11-30 2015-02-26 株式会社ニコン Shape measuring apparatus, structure manufacturing system, shape measuring method, structure manufacturing method, shape measuring program, and non-transitory computer readable medium

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190123006A (en) 2018-04-23 2019-10-31 삼보씨엠씨 주식회사 breaking device of jack up rig

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