KR101247760B1 - Apparatus and method for measuring plate position - Google Patents
Apparatus and method for measuring plate position Download PDFInfo
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- KR101247760B1 KR101247760B1 KR1020100133864A KR20100133864A KR101247760B1 KR 101247760 B1 KR101247760 B1 KR 101247760B1 KR 1020100133864 A KR1020100133864 A KR 1020100133864A KR 20100133864 A KR20100133864 A KR 20100133864A KR 101247760 B1 KR101247760 B1 KR 101247760B1
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Abstract
Disclosed is a member position measuring apparatus and method. According to an embodiment of the present invention, a method for measuring a position of a member by a member position measuring apparatus, the method comprising: a) receiving a measurement condition and generating a measurement path based on design data and measurement conditions of the member; b) measuring position data for each corner portion of the member and each point in the X-axis direction while moving along the measurement path; c) matching the design data of the member with the measured edge portion and position data in the X-axis direction; And d) moving matching so that an error that is a difference between the design data and the position data is within a reference tolerance range.
Description
The present invention relates to a member position measuring apparatus and method.
The hull of a ship is formed by combining members processed into flat plates, curved plates, straight steel and curved steel.
Therefore, in order to increase the accuracy and efficiency of the machining operation for the member in shipbuilding, the machining information is marked with lines and symbols on the surface of the member, and the machining operation is performed according to the marked information.
In shipbuilding, NC (Numerical Control) marking is to mark the long line which is the position where the longage is coupled. For NC marking, the position of the member must be known.
Since the member coming into the NC marking process comes in an arbitrary angle based on the y-axis coordinate value of the gantry, the accurate position of the member must be measured for NC marking.
Then, the position where the long line is marked is matched by matching the position of the measured member with the design data, and NC marking is executed.
Conventionally, the operator measures the amount of twist of the member by using a laser pointer for NC marking, compare the difference between the measured value and the design data and reflected it in the NC marking.
In conventional NC marking, since a person directly marks a reference point and teaches it, a measurement error is generated by manual operation.
In addition, a large amount of work time is required for the reference point measurement by hand, and reworking occurs after NC marking because it is not performed for the entire member.
In addition, although a step difference (protrusion) error is formed in the central part of the member due to the nonuniformity of the end plates and the mounting error in the sheet-based process, the measurement for this cannot be performed accurately, which is severe in NC marking through comparison with the design data. An error occurs.
An embodiment of the present invention is to provide a member position measuring apparatus and method for performing accurate NC marking by automatically measuring the position of the member.
In addition, an embodiment of the present invention is to provide a member position measuring apparatus and method for accurately measuring the step (protrusion) error of the main plate in the position measurement of the member to perform the optimum matching with the design data.
According to an aspect of the invention, the setting unit for setting the measurement conditions; A measuring unit measuring position of the member according to the measuring condition to generate position data; And a control unit which generates a measurement path based on the design data of the member and the measurement condition, controls the measurement unit along the measurement path, and matches the design data with the measured position data. do.
The controller may set a plurality of corner parts in the design data, determine a measurement order of the corner parts, and generate measurement points at predetermined intervals in the X-axis moving path.
The control unit may further include a moving unit for moving the member position measuring apparatus to the measuring path.
The controller may control the measurement unit to measure a set number of points on both sides of the edge of the member, and determine the point where the two straight lines formed by connecting the measurement points as an edge to extract the position data. .
The controller may match the design data with the measured position data so that an error that is a difference between the design data and the position data is within a reference tolerance range.
According to another aspect of the present invention, a method for measuring the position of a member by a member position measuring device, comprising: a) receiving a measurement condition and generating a measurement path based on the design data and the measurement condition of the member; b) measuring position data for each corner portion of the member and each point in the X-axis direction while moving along the measurement path; c) matching the design data of the member with the measured edge portion and position data in the X-axis direction; And d) moving matching such that an error that is a difference between the design data and the position data is within a reference tolerance range.
The measurement path of step a) may include a measurement point in the X-axis direction in each corner portion of the member, the measurement order for the corner portion, and the movement between the corner portions.
In the step b), it may include the step of extracting the position data by measuring the set number of points for both sides of the corner, and determining the point where the two straight lines generated by connecting the measurement points as the corner.
The member position measuring apparatus and method according to the embodiment of the present invention can provide accuracy and reliability when marking the long line by measuring the position of the member for NC marking.
1 is a configuration diagram schematically showing a member position measuring apparatus according to an embodiment of the present invention.
2 is a flow chart showing a member position measuring procedure according to an embodiment of the present invention.
3 is a flow chart showing a matching procedure with the design data in the member position measurement according to an embodiment of the present invention.
4 is a view showing an example for explaining a member position measuring procedure according to an embodiment of the present invention.
5 is a view schematically showing a measurement path of the member position measuring apparatus according to an embodiment of the present invention.
6 is a view schematically showing a measurement result of the member position measuring apparatus according to an embodiment of the present invention.
7 is a view showing a measurement screen of the member position measuring apparatus according to an embodiment of the present invention.
8 is a view showing a matching result through the member position measuring apparatus according to an embodiment of the present invention.
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention.
The present invention can be embodied in various different forms, and thus the present invention is not limited to the embodiments described herein.
In describing the present invention, the member refers to a plurality of abacus formed by being arranged adjacent to the species, the member referred to in the present specification means that four abacus is formed by being arranged adjacent to the species.
1 is a configuration diagram schematically showing a member position measuring apparatus according to an embodiment of the present invention.
Referring to FIG. 1, a setting unit 110, a moving
The setting unit 110 is a means for receiving various control commands of the operator who sets the operation of the member position measuring apparatus, for example, a measurement starting point, a moving direction, a moving speed, a matching condition of measured position data and design data, and the like. It may be implemented in the form of a key panel or a touch screen.
The setting unit 110 includes a button composed of numeric keys, character keys, symbol keys, and the like, and a plurality of buttons composed of one or more function keys, for example, a menu key, a confirmation key, and the like.
The moving
The
Here, the laser beam may include light, light rays or other known waves that can be irradiated to the target member to obtain the shape / position information of the member.
The
Hereinafter, in the following description of the present invention, when the lower left end of the member is assumed as the origin, the direction connecting the lower left and right lower ends or the upper left and upper right ends of the member is referred to as the X axis. The lower left and the upper left or the lower right and the upper and the right of connecting the upper right will be described on the assumption of the Y-axis.
However, this is only assumed to facilitate the understanding and explanation of the present invention, and the XY coordinate system may be variously set in the member according to the environment to which the present invention is applied.
The
The design data is data for NC marking as design data for shipbuilding provided from a server through a network (not shown).
The
The
In addition, the
In addition, the
Here, the position data may include step (protrusion) error information of the main plate constituting the member in the X-axis direction.
For example, assuming that the shape of the member is a quadrangle, the
At this time, since the corner portion cannot be accurately measured, the edges can be measured by measuring both sides forming the vertex.
When the measurement of one corner is completed, the measurement path may move to the other corner through the measurement path.
At this time, when the measurement direction of the
Here, the method of measuring the step (protrusion) error of the main plate will be described later.
As the
For example, in the process of moving in the X-axis direction, 7 points are measured to extract the position data, connected with a straight line, and the remaining 5 points are positioned except for the position data of the 2 points that deviate the most from the straight line. By extracting the data can improve the reliability of the data.
The
In this case, the
The
So far, the internal components of the member position measuring apparatus according to the exemplary embodiment of the present invention have been described with reference to FIG. 1. However, this is merely an example for the convenience of understanding and explanation of the present invention, and may be variously modified and changed according to the environment to which the present invention is applied.
For example, each of the above-described components may be divided into more subdivided components according to subdivided functions, and may be integrated into components that collectively perform the above-described functions.
Therefore, components that perform the same / similar functions as the components of the present invention regardless of the names of each component will be included in the technical idea of the present invention.
Referring to the operation of the present invention including the above function in more detail as follows.
2 is a flow chart showing a member position measuring procedure according to an embodiment of the present invention.
Each step described below is performed by the internal component of the member position measuring apparatus described above with reference to FIG. 1, but as described above, the internal component of the member position measuring apparatus according to the embodiment of the present invention may vary. Since it can be implemented, the member position measuring device is mainly described for the convenience of understanding and explanation.
Referring to FIG. 2, the member position measuring apparatus is initialized, and when the information of the member is recognized, the design file stored in the internal storage space is read (S201).
The design file is a file including design data for the member, which may be received from a server connected to a network or previously stored in a storage space of the member position measuring apparatus.
Hereinafter, the design file will be referred to as design data.
When the design data is read in step S201, the member position measuring apparatus extracts the number of corners from the read design data according to the set command (S202).
The member position measuring apparatus generates a measuring path including a measuring start point, a measuring point, a number of measuring points, a moving direction, a moving speed, and the like in order to measure the position of the member (S203).
For example, assuming that the shape of the member is a rectangle, the member position measuring device sets each corner part of the rectangle as a measurement point, and determines the measurement sequence number for each corner by referring to the moving direction connecting each corner part and the corner part. do.
Then, the member position measuring device determines the measuring point at predetermined intervals in the case of movement in the X-axis direction.
When the generation of the measurement path is completed in the step S203, the member position measuring apparatus moves to the measurement start corner, for example, corner number 1 of FIG. 4 to measure the position of the member (S204).
When the member position measuring device is moved to the measurement start corner, for example, the corner 1, in step S204, a measurement operation of acquiring an image of the member by irradiating a laser beam to the member is performed (S205).
Since it is impossible to accurately measure the edge portion of the member in the step S205, by measuring both sides to measure the intersection point where the two sides meet as the edge portion.
Here, the member position measuring apparatus may measure a predetermined number of points, for example, 10 points, for each side near the edge of the member.
Then, the member position measuring device connects the measured points by a straight line and recognizes the intersection point where the two straight lines meet as a corner portion to be measured.
The member position measuring apparatus determines whether the position measurement for the measurement start corner, for example, the corner portion 1 of FIG. 4 is completed (S206), and if the measurement is not completed, returns to the step S205.
However, if the position measurement for the measurement start corner, for example, corner 1, is completed, the direction of movement (measurement direction) for the next measurement corner, for example,
In step S207, the member position measuring device determines whether the moving direction of the member position measuring device is a movement in the X axis direction with respect to the origin (S208).
In the step S208, when the member position measuring device is determined to move in the X-axis direction, the laser beam is irradiated to the member at a predetermined interval in the process of moving to the next measurement corner, for example,
For example, when moving in the X-axis direction from the first corner portion, which is the measurement start corner, to the second corner portion, the member position data is measured at predetermined intervals, for example, at intervals of 500 to 1,000 mm.
The member position data are (X, Y) axis coordinates of the member measured in the process of moving the member position measuring device from corner 1 to
In the step S209, the member position measuring device filters the member position data measured in the process of moving in the X-axis direction to a predetermined band and extracts only normalized data, thereby providing reliability to the member position data measured in the process of moving in the X-axis direction. Give (S210).
Since the position data for various points of the member measured in the state moving in the X-axis direction may include noise, the member position measuring apparatus according to the present embodiment extracts only reliable position data through filtering.
For example, the member position measuring device extracts the position data by measuring seven points in the process of moving in the X-axis direction, connects them with a straight line, and then removes the position data of the two points that deviate most from the straight line. The five points are extracted as position data so that the position data can be provided with reliability.
If it is determined in step S208 that the member position measuring apparatus is moved in the Y-axis direction, the member position measuring device controls the moving speed to move to the next corner portion (S211).
For example, the member position measuring apparatus may control only the moving speed when the member position measuring apparatus moves from the second corner portion to the third corner portion.
In addition, the member position measuring device is able to measure the number of points, for example, 3 to 4 points set during the movement in order to prevent the deviation of the path in the movement in the Y-axis direction.
The member position measuring apparatus determines whether the measurement is completed with respect to the number of all the edge portions and the movement path in the X-axis direction through the above-described steps (S212).
If the member position measuring device has not completed the measurement for all the corner parts and the movement path in the X-axis direction in the determination of step S212, the member position measuring device returns to the step S205, and the member position measuring device returns to the designated corner part and the X-axis direction. Repeat until the measurement is completed for the movement path.
When the measurement of the member position measuring device is completed for all the edge portions and the movement path in the X-axis direction, as a result of the determination in step S212, the member position measuring device matches the position data and the design data in the X-axis direction (S213).
For example, the member position measuring device matches each measured corner portion with position data in the X-axis direction and design data to match the position where the difference is minimal.
The difference between the measurement position data and the design data by moving or rotating based on the coordinate axis (for example, X and Y axis) of the member according to a signal set by the operator as a key input means in the process of matching the measured position data and design data. The registration position is adjusted such that is minimized (S214).
When matching is completed through the above procedure, NC marking may be performed to form a long line.
So far, with reference to FIG. 2, it has been described that the member position measuring device according to the embodiment of the present invention measures the position data in the X axis direction of the member and does not measure the position data in the Y axis direction. It is apparent to those skilled in the art in view of the technical spirit of the present invention that position data can be measured in both the X-axis direction and the Y-axis direction.
3 is a flow chart showing a matching procedure with the design data in the member position measurement according to an embodiment of the present invention.
The member position measuring device according to the present invention corresponds to each corner portion of the member, the measurement data in the X-axis direction, and the design data to match according to the difference.
Hereinafter, referring to FIG. 3, the member position measuring device is mainly the same as FIG. 2 in describing the matching procedure according to the exemplary embodiment of the present invention.
Referring to FIG. 3, the member position measuring apparatus measures position data in the x-axis direction in the designated corner portion and the movement path (S301). Here, the position data in the X-axis direction means the X coordinate value and the Y coordinate value of the measurement point.
In this case, the origin of the X, Y coordinate system may be specified in various places, for example, the lower left of the member may be designated as the origin.
In the step S301, the member position measuring device is matched so that the difference between the measured position data and the design data is minimized when the measurement of the designated edge portion and the X-axis direction is completed (S302).
The matching is performed by matching the corners of the design data with the measured position data and the X-axis direction to match the positions where the difference between the design data and the measured position data is minimized.
The member position measuring apparatus determines whether or not the X-axis direction error exists evenly as a result of registration (S303). Here, the X-axis direction error means a difference value between the Y coordinate value in the coordinate values of the design data and the measured position data that are the basis of the matching.
And, "equality" may be interpreted to fall within a specified tolerance range. For example, it may be the case that the X-axis direction error according to the present embodiment is included in the specified tolerance range (for example, ± 5mm).
As a result of the determination in step S303, the member position measuring device determines that an optimum match is made when the X-axis direction error is evenly completed, and completes the matching (S306).
However, if the X-axis direction error does not exist evenly as a result of the determination in step S303, the member position measuring device determines that the difference is due to the step (protrusion) of the main plate, and moves the matching position to minimize the X-axis direction error to perform matching. (S304).
For example, one-side reference registration may be performed to match one side of position data measured on one side connecting the
Thereafter, the member position measuring apparatus determines whether the matching is made properly (S305).
If the match is not suitable in step S305, the member position measuring apparatus moves to step S304 to perform the X-axis direction matching in accordance with the movement value and / or rotation value input by the operator.
If the match is a suitable state in step S305 is determined to be the best match and complete the match (S306).
According to an embodiment of the present invention, the member position measuring apparatus basically performs optimum matching by measuring the corner portion and the X-axis direction of the movement path, and if the position in the X-axis direction is not uniform, the X-axis The movement matching is performed to minimize the error in the direction, thereby minimizing the matching error due to the step (projection) of the main plate.
In addition, by performing the optimum matching by one-sided reference matching or two-sided reference matching so that reliable NC marking can be performed.
4 is a view showing an example for explaining a member position measuring procedure according to an embodiment of the present invention.
Referring to FIG. 4, the
Referring to FIG. 4, the member position measuring apparatus sets the first to
The member position measuring apparatus may receive the
The member position measuring device measures the position data of the member by measuring the measurement points 70 set at predetermined intervals in the X-axis direction on the
5 is a view schematically showing a measurement path of the member position measuring apparatus according to an embodiment of the present invention.
Referring to FIG. 5, the member position measuring apparatus moves along the
The member position measuring device starts the measurement at the
The member position measuring device performs measurement on both sides at each corner portion, and measures the
In addition, the member position measuring device may measure three points set at any position of the
The member position measuring apparatus performs the same operation on the
In the member position measuring device, the path direction predicted when moving from the
In the embodiment according to the present invention has been described as measuring around the X-axis, but not limited to this, it is obvious that the measurement of the Y-axis can be performed.
As a further embodiment according to the present invention, a method of simultaneously measuring the X-axis direction and the Y-axis direction can be applied according to the above-described procedure, and after measuring the X-axis direction first, only the Y-axis direction can be measured later. Can be.
For the measurement in the Y-axis direction, for example, since the
That is, according to the present embodiment, the member position measuring device performs measurement at predetermined intervals with respect to each corner portion of the member and the X-axis direction, thereby minimizing registration error due to the step difference (protrusion) between the design data and the measurement data. To provide the best match.
6 is a view schematically showing a measurement result of the member position measuring apparatus according to an embodiment of the present invention.
Referring to FIG. 6, since the measured values at the measurement points 70 set at predetermined intervals on each corner of the member and the movement path include various unstable elements, the noise is removed through filtering and then the X axis of the member. Applied to the measured position value in the direction of travel. For example, in the process of moving in the X-axis direction, 7 points are measured to extract the position data, connected with a straight line, and the remaining 5 points are excluded except for the position data of the two points that deviate most from the straight line. Only location data is extracted and applied.
7 is a view showing a measurement screen of the member position measuring apparatus according to an embodiment of the present invention.
Referring to FIG. 7, FIG. 7 is an example of a screen output to the
The member position measuring apparatus basically performs the optimum matching after the measurement is completed, and may adjust the matching position according to the user's selection.
The
The values (X, Y) appearing at each
That is, the difference value (measured position data-design data) becomes a positive value when the position data value measured based on the design data is larger, and becomes a negative value when the position data value is larger.
Referring to FIG. 7, the
For example, the operator uses the menu shown in the
8 is a view showing a matching result through the member position measuring apparatus according to an embodiment of the present invention.
Referring to FIG. 8, the values shown at each
For example, X = 3.6 and Y = -0.9 of the
X = 3.4, Y = -1.1 of the
X = 4.1 and Y = -0.9 of the
X = 3.9 and Y = -1.1 of the
Y = 0.8 and Y = 3.5 in the X-axis movement path of the
In the X-axis movement path of the
Therefore, the matching position is moved so that the error in the X-axis direction is minimized so that uniform matching is provided.
Accordingly, the cutting or nurturing work is minimized due to the error due to the step (protrusion) of the main plate in the matching.
Referring to FIG. 8, a predetermined distance, for example, 1.8 mm, is moved in the Y-axis direction to match.
Although one embodiment of the present invention has been described above, the spirit of the present invention is not limited to the embodiments presented herein, and those skilled in the art who understand the spirit of the present invention may add components within the scope of the same idea, Alterations, additions, deletions, etc. may easily suggest other embodiments, but this will also be included within the scope of the invention.
110: setting unit 120: moving unit
130
150: control unit 160:
Claims (8)
A measuring unit measuring position of the member according to the measuring condition to generate position data; And
Generate a measurement path based on the design data of the member and the measurement conditions, and control the measurement part along the measurement path,
A controller for matching the design data with the measured position data;
Including,
And the control unit sets a plurality of corner portions in the design data, determines a measurement order for the corner portions, and generates measurement points at predetermined intervals in the X-axis movement path.
A measuring unit measuring position of the member according to the measuring condition to generate position data; And
A control unit for generating a measurement path based on the design data of the member and the measurement condition, controlling the measurement unit along the measurement path, and matching the design data with the measured position data,
The control unit further comprises a moving unit for moving the member position measuring device to the measurement path.
The control unit controls the measurement unit to measure the number of points set for both sides forming the corner of the member,
The member position measuring device, characterized in that for extracting the position data by determining the point where the two straight lines generated by connecting the measurement point to the corner.
And the control unit matches the design data with the measured position data so that an error that is a difference between design data and position data is within a reference tolerance range.
a) receiving a measurement condition and generating a measurement path based on the design data of the member and the measurement condition;
b) measuring position data for each corner portion of the member and each point in the X-axis direction while moving along the measurement path;
c) matching the design data of the member with the measured edge portion and position data in the X-axis direction; And
d) moving matching so that an error that is a difference between the design data and the position data is within a reference tolerance range;
Member position measurement method comprising a.
In the measurement path of step a),
And a measuring point in the X-axis direction in each corner portion of the member, the measurement order for the corner portions, and the movement between the corner portions.
In the step b)
And measuring the set number of points on both sides of the corner, and extracting the position data by determining the point where the two straight lines generated by connecting the measuring points meet as an edge.
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KR102641784B1 (en) * | 2020-10-30 | 2024-03-04 | 에이치디한국조선해양 주식회사 | A system and method that forms the curved shell of the hull |
KR102665036B1 (en) * | 2020-10-30 | 2024-05-16 | 에이치디한국조선해양 주식회사 | A system and method that forms the curved shell of the hull |
KR102665037B1 (en) * | 2020-10-30 | 2024-05-16 | 에이치디한국조선해양 주식회사 | A system and method that forms the curved shell of the hull |
CN116394190B (en) * | 2023-03-30 | 2023-11-07 | 深圳市亿图视觉自动化技术有限公司 | Curved surface screen assembling method and equipment |
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JPH06109442A (en) * | 1992-09-30 | 1994-04-19 | Toshiba Corp | Detection apparatus for three-dimensional position |
JP2001010142A (en) | 1999-06-28 | 2001-01-16 | Kawasaki Heavy Ind Ltd | Marking apparatus |
JP2010127755A (en) | 2008-11-27 | 2010-06-10 | Panasonic Corp | Installation error estimation apparatus and method |
KR100963460B1 (en) | 2005-10-27 | 2010-06-17 | 고마쓰 산기 가부시끼가이샤 | Automatic cutting device and production method for beveled product |
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2010
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JPH06109442A (en) * | 1992-09-30 | 1994-04-19 | Toshiba Corp | Detection apparatus for three-dimensional position |
JP2001010142A (en) | 1999-06-28 | 2001-01-16 | Kawasaki Heavy Ind Ltd | Marking apparatus |
KR100963460B1 (en) | 2005-10-27 | 2010-06-17 | 고마쓰 산기 가부시끼가이샤 | Automatic cutting device and production method for beveled product |
JP2010127755A (en) | 2008-11-27 | 2010-06-10 | Panasonic Corp | Installation error estimation apparatus and method |
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