JP2014059309A - Flat bed scan module, flat bed scan system, flat bed scan module alignment error measurement jig and flat bed scan module alignment error measurement method using flat bed scan module alignment error measurement jig - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flat bed scan module, a flat bed scan system, a flat bed scan module alignment error measurement jig and an alignment error measurement method using the flat bed scan module alignment error measurement jig that can reduce a measurement error by automatically scanning a shape of a flat plate.SOLUTION: A flat bed scan module 10 is a scan module for scanning the shape of the flat plate, and includes: a first laser oscillation part 12 and a second laser oscillation part 14 that are positioned at both ends of one side of a virtual quadrangle, respectively and emit a linear laser beam to the flat plate; a third laser oscillation part 16 and a fourth laser oscillation part 18 that are positioned at both ends of the other side adjacent to the one side of the quadrangle, respectively and emit the linear laser beam to the flat plate; a camera 20 that is positioned at a center part of the quadrangle and photographs the laser beam reflected from the flat plate; and a frame 24 that supports the first to fourth laser oscillation parts and the camera.

Description

  The present invention relates to a flatbed scan module, a flatbed scan system, a jig for measuring an alignment error of a flatbed scan module, and a method for measuring an alignment error of a flatbed scan module using the same. More specifically, a flatbed scan module and a flatbed that can automatically scan the shape of a flat plate to reduce measurement errors, thereby reducing work time by performing NC marking. The present invention relates to a scanning system, a jig for measuring an alignment error of a flatbed scan module, and a method for measuring an alignment error of a flatbed scan module using the jig.

  The hull structural member is formed by processing and assembling members such as a flat plate, a curved plate, straight steel, and curved steel.

  In order to improve the accuracy and efficiency of such hull processing operations, marking is performed on the surface of the steel material to be processed in advance to display processing information with lines and symbols, and processing operations are performed according to the marked information. I do.

  Conventionally, marking was done directly by hand using tools such as a tape measure and ink brush, but in recent years, marking materials have been processed by computer equipment, and marking work has been automatically performed by an NC (Numerical Control) marking machine. Yes.

  However, in such NC marking, since a person directly marks a reference point using a tape measure and teaches it, a measurement error due to manual operation may occur. There was a problem that a lot of work time was required for point measurement.

  In response to such problems, a laser vision system has been developed. The laser vision system is an apparatus that measures a workpiece by being attached to the front end of a welding torch of a welding apparatus, for example, and may be used to align the welding torch with a welding line to be welded.

  Such a laser vision system is mounted in alignment with processing equipment such as a welding apparatus. However, the mounting angle or position of the laser vision system may change due to external personnel such as vibration or load generated by work such as welding, and an alignment error may occur between the laser vision system and the processing equipment.

  The laser vision system includes a laser generator including a laser diode that emits a laser beam and a camera that captures the emitted laser beam. The laser diode and the camera are provided in alignment with each other. However, as described above, an external load such as vibration acts during actual work, and an alignment error may occur between the laser diode and the camera.

  When such alignment errors between the laser vision system and the processing equipment and alignment errors between the components in the laser vision system occur, the actual information of the measurement object and the measurement information measured by the laser vision system An error will occur between the two. As a result, there is a problem that it is difficult to ensure the reliability of the laser vision system.

  The present invention can automatically scan the shape of a flat plate to reduce measurement errors, and thereby can reduce working time by performing NC marking, and a flatbed scan module and a flatbed It aims to provide a scanning system.

  In addition, the alignment error between the flatbed scan module and the target equipment, and the alignment error between the camera of the flatbed scan module and the laser oscillation unit can be confirmed, and the degree can be measured. Another object is to provide an alignment error measurement jig and an alignment error measurement method using the jig.

  According to one aspect of the present invention, a flatbed scan module for scanning the shape of a flat plate is located at both ends of one side of a virtual quadrangle, and emits a linear laser beam to the flat plate. The first laser oscillation unit and the second laser oscillation unit, and the third laser oscillation unit and the fourth laser oscillation unit, which are respectively positioned at both ends of the other side adjacent to one side of the quadrangle and emit a linear laser beam to the flat plate A flatbed scan module that includes a camera that is located at the center of the quadrangle and that captures the laser beam reflected from the flat plate, and a frame that supports the first to fourth laser oscillators and the camera. The

  The linear laser beam emitted from the first to fourth laser oscillation units can be emitted toward the lower plate of the camera.

  The tilt angle of the main axis of the laser beam tilting with respect to the optical axis of the camera can be adjusted.

  The linear laser beams emitted from the first to fourth laser oscillation units can be emitted so as to intersect the outer periphery of the flat plate.

  When the flat plate has a straight outer periphery, the linear laser beam may be orthogonal to the straight outer periphery.

  According to another aspect of the present invention, a flatbed scanning system for scanning the shape of a flat plate, the gantry moving along the rail, and the trolley moving along the gantry. And a first laser oscillation unit and a second laser oscillation unit, which are respectively positioned at both ends of one side of the virtual quadrangle and emit a linear laser beam on a flat plate, and at both ends of the other side adjacent to one side of the quadrangle A third laser oscillation unit and a fourth laser oscillation unit which are respectively positioned and emit a linear laser beam to a flat plate; a camera which is positioned at the center of the quadrangle and which reflects the laser beam reflected from the flat plate; A flat bed scanning system including a fourth laser oscillation unit and a frame supporting the camera and coupled to a trolley.

  The linear laser beam emitted from the first to fourth laser oscillation units can be emitted toward the lower plate of the camera.

  The tilt angle of the main axis of the laser beam tilting with respect to the optical axis of the camera can be adjusted.

  The linear laser beams emitted from the first to fourth laser oscillation units may be emitted so as to intersect the outer periphery of the flat plate. When the flat plate has a straight outer periphery, the linear laser beam may be orthogonal to the straight outer periphery.

  A marking part connected to the trolley and marking a specific shape on the flat plate may be further included.

  According to still another aspect of the present invention, a pair of lasers selected from the first laser oscillation unit, the second laser oscillation unit, the third laser oscillation unit, and the fourth laser oscillation unit of the flatbed scan module described above. Alignment error between a pair of laser oscillator and camera that emits a linear laser beam from the oscillator to form a cross beam, and target equipment equipped with flatbed scan module and flatbed scan module Alignment error measurement jig of a flatbed scan module for measuring an alignment error between and a plane part having a plane on which a cross beam is scanned, and an inclined surface surrounding the plane part and in contact with the plane Provided with an alignment error measurement jig for flatbed scan modules including It is.

  The plane may be a regular quadrangle, and the inclined surface may include four trapezoidal surfaces that are in contact with the sides of the plane.

  The inclinations of the four trapezoidal surfaces with respect to the plane may be the same.

  According to still another aspect of the present invention, an alignment error between the pair of laser oscillation units forming the cross beam and the camera, and the flatbed scan using the alignment error measuring jig. A method for measuring an alignment error between a module and target equipment provided with the flatbed scan module, the pair of laser oscillation units, the camera, and the flatbed scan module. Capturing a pair of reference lines formed by scanning the cross beam on the plane portion with the camera and obtaining reference data during alignment with the target equipment, the pair of laser oscillation units and the camera And between the flatbed scan module and the target equipment at least When an alignment error occurs in one of them, a step of photographing a pair of measurement lines formed by scanning the cross beam on the plane portion with the camera to obtain measurement data, the reference data, and the measurement data And calculating an error of the measurement data with respect to the reference data. A method for measuring an alignment error of a flatbed scan module is provided.

  The reference data may include first reference coordinate values for both end points of the pair of reference lines, and the measurement data may include first measurement coordinate values for both end points of the pair of measurement lines.

  The reference data may further include a second reference coordinate value for the center point of each of the pair of reference lines, and the measurement data may further include a second measurement coordinate value for the center point of each of the pair of measurement lines. .

  The reference data may further include a length of each of the pair of reference lines, and the measurement data may further include a length of each of the pair of measurement lines.

  The reference data may further include a slope of a remaining reference line with respect to one reference line of the pair of reference lines, and the measurement data may be a remaining measurement line with respect to one measurement line of the pair of measurement lines. The inclination of the measurement line can be further included.

  The reference data may further include a thickness of each of the pair of reference lines, and the measurement data may further include a thickness of each of the pair of measurement lines.

  The plate shape can be automatically scanned to reduce measurement errors.

  In addition, the working time can be shortened by automatically scanning the shape of the flat plate, thereby marking the specific shape on the flat plate.

  In addition, the alignment error between the flatbed scan module and the target equipment, and the alignment error between the camera and the laser oscillator of the flatbed scan module can be confirmed, and the degree of the error is measured. can do.

1 is an exploded perspective view of a flatbed scan module according to an embodiment of the present invention. 1 is a combined perspective view of a flatbed scan module according to an embodiment of the present invention. It is a top view of the flatbed scan module concerning one example of the present invention. FIG. 6 is a perspective view of a flatbed scanning system according to another embodiment of the present invention. FIG. 6 is a partial perspective view of a flatbed scanning system according to another embodiment of the present invention. It is the schematic for demonstrating the method to scan a flat plate using the flatbed scanning system which concerns on the other Example of this invention. It is the schematic for demonstrating the method to scan a flat plate using the flatbed scanning system which concerns on the other Example of this invention. It is the schematic for demonstrating the method to scan a flat plate using the flatbed scanning system which concerns on the other Example of this invention. It is the schematic for demonstrating the method to scan a flat plate using the flatbed scanning system which concerns on the other Example of this invention. It is the schematic which shows the alignment error measurement process using the jig | tool for alignment error measurement of the flatbed scan module which concerns on one Example of this invention. It is a top view which shows the jig for alignment error measurement of the flatbed scan module which concerns on one Example of this invention. It is a front view which shows the jig for alignment error measurement of the flatbed scan module which concerns on one Example of this invention. FIG. 6 is a flowchart illustrating a method for measuring alignment errors of a flatbed scan module according to another embodiment of the present invention. It is a top view which shows the reference line at the time of the acquisition process of the reference data of the alignment error measuring method of the flatbed scan module which concerns on the other Example of this invention. It is a top view which shows the measurement line at the time of the acquisition process of the measurement data of the alignment error measuring method of the flatbed scan module which concerns on the other Example of this invention. It is a top view which shows the measurement line at the time of the acquisition process of the measurement data of the alignment error measuring method of the flatbed scan module which concerns on the other Example of this invention. It is a top view which shows the measurement line at the time of the acquisition process of the measurement data of the alignment error measuring method of the flatbed scan module which concerns on the other Example of this invention. It is a top view which shows the measurement line at the time of the acquisition process of the measurement data of the alignment error measuring method of the flatbed scan module which concerns on the other Example of this invention.

  Hereinafter, a flatbed scan module, a flatbed scan system, a jig for measuring an alignment error of a flatbed scan module, and a method for measuring an alignment error of a flatbed scan module using the same will be described. An example will be described in detail with reference to the accompanying drawings. In the description with reference to the accompanying drawings, the same or corresponding components are denoted by the same drawing numbers, and redundant description thereof will be omitted.

  FIG. 1 is an exploded perspective view of a flatbed scan module according to an embodiment of the present invention. FIG. 2 is a combined perspective view of a flatbed scan module according to an embodiment of the present invention. FIG. 3 is a plan view of a flatbed scan module according to an embodiment of the present invention. Referring to FIGS. 1 to 3, the flatbed scan module 10, the first laser oscillator 12, the second laser oscillator 14, the third laser oscillator 16, the fourth laser oscillator 18, the camera 20, and the bracket 22. The frame 24, the lower case 26, the supports 28 and 32, the openings 30 and 36, and the upper case 34 are shown.

  The flatbed scan module 10 according to the present embodiment is a flatbed scan module for scanning the shape of a flat plate, which is located at both ends of one side of a virtual quadrangle, and is linear on the flat plate. A first laser oscillator 12 and a second laser oscillator 14 that emit laser beams, and a third laser oscillator that is positioned at both ends of the other side adjacent to one side of the quadrangle and emits a linear laser beam on a flat plate Unit 16 and fourth laser oscillation unit 18, a camera 20 which is located at the center of the quadrangle and captures the laser beam reflected from the flat plate, and first to fourth laser oscillation units 12, 14, 16, 18 and camera And a frame 24 that supports 20 and can automatically scan the shape of the flat plate to reduce measurement errors.

  A method of scanning the shape of a flat plate using the flatbed scan module 10 according to the present embodiment is as follows. First, a laser beam is irradiated at a predetermined interval while moving the flatbed scan module 10 along the outer periphery of the flat plate, and this is photographed by the camera 20 to obtain an image of the laser beam. Then, the image thus obtained is processed to scan the shape of the flat plate.

  The first laser oscillation unit 12, the second laser oscillation unit 14, the third laser oscillation unit 16, and the fourth laser oscillation unit 18 emit a linear laser beam. Such a linear laser beam is emitted so as to intersect the outer periphery of the flat plate member, and the camera 20 captures an image of the laser beam reflected from the flat plate.

  The linear laser beam emitted so as to intersect the outer periphery of the flat plate changes the shape of the reflected laser beam according to the shape of the outer periphery of the flat plate, and this is photographed by the camera 20 to obtain an image. Become.

  The flatbed scan module 10 according to the present embodiment scans the outer peripheral shape of the flat plate while moving along a linear direction or a direction orthogonal to the linear direction.

  In order to scan the outer peripheral shape of the flat plate member, the first laser oscillating unit 12 and the second laser oscillating unit 14 are arranged at both ends of one side of a virtual square, respectively, and the third laser oscillating unit 16 and the fourth laser oscillating unit 18 are arranged. Are arranged at both ends of the other side adjacent to one side of the virtual quadrangle. With this arrangement, the first laser oscillation unit 12 and the third laser oscillation unit 16 are arranged adjacent to each other.

  The first laser oscillating unit 12 and the second laser oscillating unit 14 are paired with each other, and emit a laser beam to the outer periphery of the opposed flat plates.

  The third laser oscillation unit 16 and the fourth laser oscillation unit 18 are paired with each other, and emit a laser beam to the outer periphery of the flat plates facing each other.

  The camera 20 is located at the center of the imaginary quadrilateral and photographs the laser beam emitted from the first laser oscillation unit 12 to the fourth laser oscillation unit 18 and reflected from the flat plate. In this way, one camera 20 is arranged at the center, and laser beams are emitted with the laser oscillation units 12, 14, 16, and 18 positioned at the ends of the imaginary quadrilateral directed toward the flat plate below the camera 20. Thus, the camera 20 can take an image of the laser beam emitted from each of the laser oscillators 12, 14, 16, and 18.

  On the other hand, the tilt angle of the main axis of the laser beam tilted with respect to the optical axis of the camera can be adjusted. For this purpose, each laser oscillator 12, 14, 16, 18 may be coupled to the frame 24 using a bracket 22 that can adjust the tilt angle.

  More specifically, referring to FIG. 7 and FIG. 9, the tilt angle is determined by the linear laser beam 13 emitted toward the flat plate 46 and projected onto the flat plate 46 and the optical axis 21 of the camera. It is defined as an angle formed by a virtual surface to be defined and a virtual surface defined by the linear laser beam 13 projected on the flat plate 46 and the principal axis 15 of the laser beam emitted from the laser oscillation units 12 and 14. The magnitude of the tilt angle can be adjusted by the bracket 22.

  The linear laser beam is formed by emitting a laser beam emitted from a laser diode in both directions by optical processing. A virtual line that bisects the radiation angle of such a linear laser beam can be defined as the main axis 15 of the linear laser beam.

  By adjusting the tilt angle, the width of the linear laser beam 13 projected onto the flat plate 46 can be adjusted, and an image can be easily obtained using the camera 20. For example, when the width of the groove portion 47 is narrow and the groove angle is steep, the resolution of the image of the linear laser beam obtained from the camera may be lowered. In this case, the tilt angle is increased to widen the width of the linear laser beam 13 projected onto the flat plate 46 so that an image of the laser beam can be easily obtained.

  The frame 24 supports the first laser oscillation unit 12, the second laser oscillation unit 14, the third laser oscillation unit 16, the fourth laser oscillation unit 18, and the camera 20 that are located on a virtual quadrangle. In this embodiment, a rectangular plate material is used as the frame 24. However, the present invention is not limited to this, and it is apparent that various shapes of frames can be used, such as assembling a bar-shaped steel material to form a frame.

  The lower case 26, the frame 24 and the upper case 34 are connected to each other through a plurality of supports 28 and 32 to protect the flatbed scan module 10.

  The lower case 26 is formed with openings 30 corresponding to the positions of the laser oscillation parts 12, 14, 16, 18, and a laser beam is emitted through the openings 30.

  Further, an opening 36 is formed in the upper case 34 for connection with another device, and the other device can be connected to the frame 24 through the opening 36.

  As another example, when the flat plate has a straight outer periphery, the linear laser beam can be emitted so as to be orthogonal to the straight outer periphery. A flat plate having a polygonal shape has outer peripheries in various directions, but a linear laser beam is irradiated so as to be orthogonal to each direction, and the reflected laser beam is photographed by the camera 20.

  FIG. 4 is a perspective view of a flatbed scan system according to another embodiment of the present invention, and FIG. 5 is a partial perspective view of a flatbed scan system according to another embodiment of the present invention. . 4 and 5, the flatbed scan module 10, rail 38, gantry 40, trolley rail 42, trolley 44, flat plate 46, fixture 48, square frame 50, connection bar 52, connection tool 54, marking Portion 56 is shown.

  The flat bed scanning system according to this embodiment is a flat bed scanning system for scanning the shape of the flat plate 46, and includes a gantry 40 that moves along a rail 38, and a gantry 40. A trolley 44 that moves in each direction, a first laser oscillation unit and a second laser oscillation unit that are positioned at both ends of one side of the virtual quadrangle and emit a linear laser beam to the flat plate 46, and one side of the quadrangle Are located at both ends of the other side adjacent to each other, and the third laser oscillation unit and the fourth laser oscillation unit for emitting a linear laser beam to the flat plate 46, are located at the center of the quadrangle, and are reflected from the flat plate 46. Further, the camera 20 for photographing the laser beam 13 (see FIG. 7), the first to fourth laser oscillation units and the camera 20 are supported, and the trolley 44 Anda frame coupled, it is possible to reduce the measurement error automatically scans the shape of the flat plate 46.

  In the flat bed scanning system according to the present embodiment, the above-described flat bed scanning module 10 is attached to a gantry robot including a gantry 40 that moves along the rail 38 and a trolley 44 that moves along the gantry 40. Thus, the shape of the flat plate 46 is scanned.

  In the description of the present embodiment, a detailed description of components that overlap with the flatbed scan module 10 described above is omitted.

  The gantry 40 is a gate-shaped structure that moves along two parallel rails 38, and the trolley 44 is a moving pulley that moves in the longitudinal direction of the gantry 40. Various kinds of equipment such as a measuring instrument, a welding machine, and a cutting machine can be attached to the trolley 44, and the equipment can be moved to a predetermined position on the plane by moving the gantry 40 and the trolley 44.

  In this embodiment, the flatbed scan module 10 described above is attached to the trolley 44 to scan the shape of the flat plate 46.

  The method of scanning the shape of the flat plate 46 using the flatbed scan module 10 attached to the trolley 44 is as follows. First, the flatbed scan module 10 is moved to the outer periphery of the flat plate 46 by moving the gantry 40 and the trolley 44. While moving along, a linear laser beam is emitted from the laser oscillator of the flatbed scan module 10, and the laser beam reflected from the flat plate 46 is photographed by the camera 20 to obtain an image. The obtained image is converted into image data, the image data is processed, and the shape of the flat plate 46 is scanned.

  The camera of the flatbed scan module 10 is positioned above the outer periphery of the flat plate 46 to be scanned, and reflects a linear laser beam emitted from the laser oscillation section so as to intersect the outer periphery of the flat plate 46. Take the captured image.

  The first laser oscillating unit and the second laser oscillating unit arranged in the horizontal direction (X direction in FIG. 4) use a linear laser beam to scan the outer periphery in the vertical direction of the flat plate 46 to be scanned. The third laser oscillation unit and the fourth laser oscillation unit that are emitted and arranged in the vertical direction (the Y direction in FIG. 4) are linear in order to scan the outer periphery in the lateral direction of the flat plate 46 to be scanned. A laser beam is emitted.

  The fixing tool 48 is for attaching the flatbed scan module 10 to the trolley 44. In this embodiment, the fixing tool 48 has a rectangular square frame 50 and a connecting bar 52 protruding from both ends of the lower part of the rectangular frame 50. It consists of and.

  One side of the square frame 50 is connected to the trolley 44, and the flatbed scan module 10 is connected to one of the connection bars 52 protruding from both ends of the other side of the square frame 50 by a connector 54, and the rest One of these is connected to a marking portion 56 described later. The connector 54 is connected to the frame 24 through the opening 36 of the upper case 34 of the flatbed scan module 10 to connect the frame 24 and the trolley 44.

  The flat bed scanning system according to the present embodiment includes the above-described flat bed scanning module 10 on a gantry robot including a gantry 40 that moves along the rail 38 and a trolley 44 that moves along the gantry 40. A specific shape can be marked on the flat plate 46 by using the marking portion 56 attached to the trolley 44 while adhering and scanning the shape of the flat plate 46.

  It is necessary to mark the welding position of various longitudinal members and the cutting position of the flat plate 46 on the flat plate 46 for forming the hull. In order to mark the flat plate 46 member, the gantry 40 can be marked using a conveyor or the like. A flat plate 46 is loaded at the bottom.

  When the flat plate 46 is loaded, it is necessary to set a reference point for marking, and the flat plate scan module 10 attached to the trolley 44 is used to scan the shape of the flat plate 46. A specific shape such as a welding position and a cutting position of the longitudinal member is marked on the flat plate 46 using the marking unit 56 according to the shape of the scanned flat plate 46.

  The marking unit 56 according to the present embodiment can include a marking torch that sprays zinc-based powder from an oxygen nozzle and burns it with a preheating flame. Below, the method to mark a specific shape using a marking torch is demonstrated.

  When the shape of the flat plate 46 is scanned by the flatbed scanning module 10, the specific position of the flat plate 46 is coordinated, whereby the marking torch marks the specific shape while moving on the flat plate 46.

  When the shape of the flat plate 46 can be predicted, it is possible to set the reference point by scanning only a specific portion around the outer periphery of the flat plate 46. For example, when marking a specific shape on the rectangular flat plate 46, it is possible to perform marking using a marking torch after only the apex portion of the rectangular flat plate 46 is scanned to coordinate the position of the apex.

    By moving the gantry 40 and the trolley 44, the marking torch can be moved to a predetermined position on the flat plate 46, whereby a specific shape can be marked on the flat plate 46.

  In the present embodiment, a method of marking a specific shape on the flat plate 46 using a marking torch as the marking portion 56 has been shown. However, other methods such as punch marking and painting may be used for the flat plate 46. A specific shape can be marked on the top.

  6 to 9 are schematic views for explaining a flat plate scanning method using a flatbed scanning system according to another embodiment of the present invention. 6 to 9, the flatbed scan module 10, the first laser oscillation unit 12, the second laser oscillation unit 14, the main shaft 15, the third laser oscillation unit 16, the fourth laser oscillation unit 18, and the camera 20. The optical axis 21, the flat plate 46, and the groove portion 47 are shown.

  6 and 7 are diagrams for explaining a method of scanning the outer periphery in the vertical direction of the flat plate 46 using the first laser oscillation unit 12 positioned in the horizontal direction (refer to the X direction in FIG. 4). In order to scan the outer periphery on the left side of the flat plate 46, the camera 20 is positioned above the outer periphery on the left side, and the flatbed scan module 10 is moved along the outer periphery on the left side. A laser beam is emitted from the first laser oscillation unit 12 at a predetermined interval by the movement of the flatbed scan module 10, and the linear laser beam 13 projected and reflected on the flat plate 46 is photographed by the camera 20. The linear laser beam 13 emitted from the first laser oscillator 12 is emitted so as to intersect with the outer periphery in the vertical direction of the flat plate 46, and the shape of the laser beam 13 depends on the shape of the outer periphery of the flat plate 46. The image is captured by the camera 20 to obtain an image. For example, when the groove portion 47 is formed on the outer periphery of the flat plate 46 for welding the flat plate 46, the laser beam 13 should be photographed in a folded shape as shown in FIG. If the scan module 10 is positioned on a flat stage, the shape of a linear laser beam should be imaged. The shape of the flat plate 46 can be scanned from the image of the laser beam 13 photographed in this way.

  8 and 9 are for explaining a method of scanning the outer periphery in the vertical direction of the flat plate 46 using the second laser oscillation unit 14 positioned in the horizontal direction (see the X direction in FIG. 4). To scan the outer periphery on the right side of the flat plate 46, the trolley 44 is used to move the flat bed scan module 10 to the outer periphery on the right side of the flat plate 46, and the flat bed scan module 10 is moved along the outer periphery on the right side. The linear laser beam 13 is emitted from the second laser oscillation unit 14 while being moved, and the reflected laser beam 13 is photographed by the camera 20 to scan the shape of the outer periphery on the right side of the flat plate 46.

  Thus, the first laser oscillation unit 12 and the second laser oscillation unit 14 emit a laser beam 13 to the outer periphery of the flat plate 46 facing each other in the vertical direction in a pair.

  The third laser oscillation unit 16 and the fourth laser oscillation unit 18 positioned in the vertical direction (see the Y direction in FIG. 4) are for scanning the outer periphery in the lateral direction of the flat plate 46, and the third laser oscillation is performed. The part 16 and the fourth laser oscillation part 18 emit a laser beam 13 to the outer periphery of the flat plates 46 that are opposed to each other in the lateral direction.

  The method of scanning the shape of the flat plate 46 using the third laser oscillation unit 16 and the fourth laser oscillation unit 18 is similar to the method of scanning using the first laser oscillation unit 12 and the second laser oscillation unit 14 described above. The description thereof is omitted.

  In this embodiment, the method for scanning the shape of the rectangular flat plate 46 has been described. However, as described above, the outer periphery in the vertical direction of the flat plate 46 is scanned using the first laser oscillation unit 12 and the second laser oscillation unit 14. Since the outer periphery in the lateral direction of the flat plate 46 can be scanned using the third laser oscillation unit 16 and the fourth laser oscillation unit 18, the flat plate 46 having various shapes such as a circle and a polygon is scanned. Obviously it can be done.

  FIG. 10 is a schematic diagram illustrating an alignment error measurement process using an alignment error measurement jig of a flatbed scan module according to an embodiment of the present invention.

  According to the present embodiment, as shown in FIG. 10, an alignment error measurement jig 110 of the flatbed scan module 10 including a flat portion 120 and an inclined portion 130 is provided.

  Such an alignment error measuring jig 110 is used to measure an alignment error between the flatbed scan module 10 and the target equipment 105 provided with the flatbed scan module 10. Further, it is used to measure an alignment error between the laser oscillation unit which is a component of the flatbed scan module 10 and the camera.

  Since the specific configuration of the flatbed scan module 10 is as described above, its description is omitted.

  A linear laser beam is emitted from a pair of laser oscillation units selected from the first laser oscillation unit, the second laser oscillation unit, the third laser oscillation unit, and the fourth laser oscillation unit of the flatbed scan module 10 described above. Then, a cross beam is formed, and the camera photographs the cross beam scanned by the alignment error measurement jig 110.

  The first laser oscillation unit and the third laser oscillation unit may be paired to form a cross beam, or the second laser oscillation unit and the fourth laser oscillation unit may be paired to form a cross beam. Alternatively, the first laser oscillation unit and the fourth laser oscillation unit may be paired to form a cross beam, or the second laser oscillation unit and the third laser oscillation unit may be paired to form a cross beam. Good.

  According to the present embodiment, a control unit (not shown) receives an image captured by a camera and is displayed by a reference line and a measurement line (cross beam scanned on the plane unit 120) of the image. 1st and 2nd reference coordinate values, 1st and 2nd measurement coordinate values, and reference data and measurement data such as the length, inclination and thickness of the reference line and measurement line are extracted from Thus, the alignment error can be calculated using these.

  Thus, according to the present embodiment, the alignment error between the flatbed scan module 10 and the target equipment 105 can be confirmed, and the degree of the error can be easily measured. Furthermore, the alignment error between the camera of the flatbed scan module 10 and the pair of laser oscillation units can be confirmed, and the degree of the error can be easily measured.

  Hereinafter, each configuration will be described in more detail with reference to FIGS. 10 to 12.

  11 and 12 are a plan view and a front view showing an alignment error measurement jig of the flatbed scan module according to one embodiment of the present invention.

  As shown in FIGS. 10 to 12, the plane unit 120 has a plane on which the cross beam is scanned. That is, the cross beam generated from the pair of laser oscillation units selected from the first to fourth laser oscillation units is scanned on the plane of the plane unit 120 and the inclined plane of the ramp unit 130, A reference line or measurement line is formed.

  As a result, the cross beam scanned from the pair of laser oscillation units is displayed as a straight line as a reference line or a measurement line on the plane unit 120, so that the reference data and flat bed scan during alignment of the flat bed scan module are displayed.・ Measurement data at the time of module alignment error can be obtained more precisely.

  In this case, the plane of the plane portion 120 is a regular square as shown in FIGS. Since the plane part 120 has a regular rectangular plane, the lengths of the pair of reference lines displayed on the plane part 120 when the flatbed scan module 10 is aligned are equal to each other. Can be calculated.

  As shown in FIGS. 10 to 12, the inclined portion 130 has an inclined surface that surrounds the flat surface portion 120 and is in contact with the flat surface. The inclined portion 130 is formed along the outer periphery of the planar portion 120 and is inclined with respect to the plane of the planar portion 120. As a result, a singular point that facilitates the extraction of the position by the camera is formed on the boundary line (side of the plane) between the plane portion 120 and the inclined portion 130, and more accurate reference data and measurement data can be extracted more easily. Can do.

  As shown in FIGS. 10 to 12, the inclined surface of the inclined portion 130 may include four trapezoidal surfaces that are in contact with the sides of the plane. As described above, since the plane of the plane portion 120 is a regular tetragon, the inclined surfaces formed by the four trapezoidal surfaces are in contact with the sides of the regular tetragonal plane.

  As shown in FIGS. 10 to 12, the inclinations of the four trapezoidal surfaces with respect to the plane are equal to each other. That is, the trapezoidal inclined surfaces of the inclined portion 130 are formed to be equally inclined with respect to the plane.

  Eventually, the alignment error measuring jig 110 according to the present embodiment is realized in the shape of a regular quadrangular pyramid as shown in FIGS. As a result, the alignment error measuring jig 110 is horizontally and vertically symmetric, so that the alignment error of the flatbed scan module 10 can be more easily confirmed, and the alignment error can be measured more precisely. Can do.

  Next, a method for measuring an alignment error of a flatbed scan module according to another embodiment of the present invention will be described.

  FIG. 13 is a flowchart illustrating an alignment error measurement method for a flatbed scan module according to another embodiment of the present invention.

  Referring to FIG. 10 and FIG. 13, the alignment error measurement method of the flatbed scan module according to the present embodiment uses the alignment error measurement jig 110 described in the above-described embodiment to connect the laser oscillation unit and the camera. A method for measuring an alignment error between the flatbed scan module 10 and the target equipment 105, and obtaining reference data during alignment of the flatbed scan module; Obtaining measurement data when an alignment error of the flatbed scan module occurs and calculating an error of the measurement data with respect to the reference data can be included.

  According to the present embodiment, the alignment error between the flatbed scan module 10 and the target equipment 105 can be confirmed, and the degree of the error can be easily measured. Furthermore, the alignment error between the camera of the flatbed scan module 10 and the laser oscillation unit can be confirmed, and the degree of the error can be easily measured.

  Specifically, the alignment error measuring method of the flatbed scan module according to the present embodiment will be described. First, the laser oscillation unit and the camera, and the flatbed scan module 10 and the target equipment 105 are respectively aligned. In the initial state, the alignment error measuring jig 110 is aligned with the target equipment 105 (S110).

  In this case, an origin alignment unit (not shown) may be disposed in the direction of the inclined portion 130 side of the alignment error measuring jig 110. Therefore, the alignment error measurement jig 110 and the target equipment 105 can be more effectively aligned using such an origin alignment unit.

  Next, at the time of alignment of the laser oscillation unit and the camera, and the flatbed scan module 10 and the target equipment 105, a pair of reference lines formed by scanning the cross beam on the plane unit 120 is photographed by the camera and the reference data. Is obtained (S120).

  FIG. 14 is a plan view showing a reference line in a process of obtaining reference data of an alignment error measurement method for a flatbed scan module according to another embodiment of the present invention.

  As shown in FIG. 14, a pair of reference lines 150 a and 150 b formed by scanning the cross beam on the plane unit 120 is displayed on the image captured by the camera. Accordingly, reference data can be extracted from such reference lines 150a and 150b. Here, the reference data may include the first reference coordinate value, the second reference coordinate value, the length and inclination of the reference line, and the like.

  The first reference coordinate value means a two-dimensional coordinate value for each of the end points a1, a2, b1, b2 of the pair of reference lines 150a, 150b. As shown in FIG. 14, the image displayed on the alignment error measurement jig 110 by the cross beam is folded by the alignment error measurement jig 110 to generate a singular point, and thus the singular point generated in this way. That is, the two-dimensional coordinates for the end points a1, a2, b1, b2 of the reference lines 150a, 150b are obtained as the first reference coordinate values.

  The second reference coordinate value means a second dimension coordinate value for the center point of each of the pair of reference lines 150a and 150b. Such a second reference coordinate value can be calculated using the first reference coordinate value described above.

  For example, the two-dimensional coordinates for the end points a1 and a2 of the arbitrary reference line 150a are the first reference coordinate values. In this case, the midpoint of the first reference coordinate value with respect to both end points a1 and a2 can be obtained as the second reference coordinate value.

  The length and inclination of the pair of reference lines 150a and 150b can also be calculated using the above-described first reference coordinate values. For example, a distance between two first reference coordinate values with respect to both end points a1 and a2 of one reference line 150a is obtained as the length of the reference line 150a, and the reference axis is calculated from the two first reference coordinate values. The inclination with respect to the remaining one reference line 150b can be calculated.

  Further, the thickness of the pair of reference lines 150a and 150b can be obtained as the reference data described above.

  Next, when an alignment error occurs between at least one of the laser oscillation unit and the camera and between the flatbed scan module and the target equipment, the cross beam is scanned on the plane unit 120 and formed. A pair of measurement lines 150c and 150d is photographed with a camera to obtain measurement data (S130).

  In order to obtain the measurement data in this way, a process of aligning the alignment error measurement jig 110 with the target equipment 105 using the origin alignment unit is required in the same manner as the process of obtaining the reference data described above. As a result, the alignment error measurement jig 110 maintains the same relative position as when the reference data is obtained for the target equipment 105.

  15 to 18 are plan views showing measurement lines in a process of obtaining measurement data of an alignment error measurement method for a flatbed scan module according to another embodiment of the present invention.

  As shown in FIGS. 15 to 18, a pair of measurement lines 150 c and 150 d formed by scanning the cross beam on the plane portion 120 is displayed on the image taken by the camera. Therefore, measurement data can be extracted from such measurement lines 150c and 150d. Here, like the reference data, the measurement data may include the first measurement coordinate value, the second measurement coordinate value, the length and inclination of the measurement line, and the like.

  The measurement data of the first measurement coordinate value means a two-dimensional coordinate value for each of the end points c1, c2, d1, and d2 of the pair of measurement lines 150c and 150d. The second measurement coordinate value means a two-dimensional coordinate value with respect to the center point of each of the pair of measurement lines 150c and 150d, and can be calculated using the first measurement coordinate value.

  The length and inclination of the pair of measurement lines 150c and 150d can also be calculated using the first measurement coordinate values. And the thickness of a measurement line can also be obtained as measurement data.

  Next, the reference data and the measurement data are compared to calculate an error of the measurement data with respect to the reference data (S140). After securing the reference data and measurement data by the above-described process, comparing them with each other, the flatbed scan module 10 (see FIG. 10) and the target equipment 105 (see FIG. 10) or the laser oscillation unit Whether or not alignment with the camera is possible can be easily confirmed.

  Further, by calculating the error of the measurement data with respect to the reference data, between the flatbed scan module 10 (see FIG. 10) and the target equipment 105 (see FIG. 10), or between the laser oscillation unit and the camera. The degree of alignment error can be easily measured.

  Furthermore, it is possible to easily confirm whether the laser oscillation unit is abnormal by comparing the reference data and the data related to the thickness in the measurement data.

  Specifically, referring to FIG. 14 and FIG. 15, the length, inclination and thickness of the line in the measurement data are the same as the reference data obtained in advance. However, the line intersection was moved horizontally compared to the reference data.

  Thereby, it can be confirmed that the center of the flatbed scan module 10 (see FIG. 10) is moved and arranged in the horizontal direction with respect to the target equipment 105 (see FIG. 10). Thereby, it can be seen that the flatbed scan module 10 is not aligned with the target equipment 105.

  Referring to FIGS. 14 and 16, the thickness of the line in the measurement data is the same as the reference data obtained in advance. However, the length and slope of the line are different from the reference data. That is, the length of one measurement line 150c is different from the length of the corresponding reference line 150a, and the inclination between one measurement line 150c and the remaining one measurement line 150d is a pair of reference lines 150a, Different from the slope between 150b.

  Accordingly, it can be confirmed that the separation angles of the pair of laser diodes included in the laser oscillation unit that generates the cross beam are out of the aligned state.

  Referring to FIGS. 14 and 17, the line length, the line inclination, and the line thickness in the measurement data are the same as the reference data obtained in advance. However, the image of the alignment error measurement jig 110 photographed by the camera shown in FIG. 17 and the pair of measurement lines 150c and 150d scanned by the jig is rotated at a constant angle as compared with the image shown in FIG. It is in.

  Thereby, it can be confirmed that only the camera is out of the aligned state.

  14 and 18, the thickness of one measurement line 150c of the pair of measurement lines 150c, 150d is smaller than the corresponding reference line 150a. Thereby, it can be confirmed that one of the laser diodes included in the laser oscillation unit is weakened or damaged.

  The above description has been made with reference to the preferred embodiments of the present invention. However, those skilled in the art will not depart from the spirit and scope of the present invention described in the following claims. It will be understood that various modifications and changes can be made to the present invention within the scope.

10 Flatbed scan module,
12, 14, 16, 18 laser oscillation part,
20 cameras,
22 bracket,
24 frames,
26 Lower case,
28, 32 support,
30, 36 opening,
34 Upper case,
38 rails,
40 Gantry,
42 Trolley rail,
44 Trolley,
46 flat plate,
48 fasteners,
50 square frame,
52 connecting bar,
54 connectors,
110 Jig for measuring alignment error,
120 plane part,
130 slope,
150a, 150b reference line,
150c, 150d Measurement line.

Claims (9)

A first laser oscillating unit and a second laser oscillating unit which are respectively located at both ends of one side of a virtual quadrangle and emit a linear laser beam to an inclined surface in contact with the flat plate and the plane;
A third laser oscillation unit and a fourth laser oscillation unit, which are respectively located at both ends of the other side adjacent to one side of the quadrangle, and emit linear laser beams to the inclined surface in contact with the flat plate and the plane;
A camera for photographing the laser beam reflected from an inclined surface in contact with the flat plate and the plane, which is located at the center of the quadrangle;
The first laser oscillation unit, the second laser oscillation unit, and the third laser oscillation unit of a flatbed scan module including the first laser oscillation unit to the fourth laser oscillation unit and a frame that supports the camera. A linear laser beam is emitted from a pair of laser oscillation units selected from the fourth laser oscillation unit to form a cross beam, and an alignment error between the pair of laser oscillation units and the camera, and A jig for measuring an alignment error of a flatbed scan module for measuring an alignment error between the flatbed scan module and a target equipment provided with the flatbed scan module,
A plane portion having a plane in which the cross beam is scanned;
A jig for measuring an alignment error of a flatbed scan module, comprising: an inclined portion surrounding the flat portion and having an inclined surface in contact with the flat surface. The plane is a regular square;
The jig for measuring an alignment error of a flatbed scan module according to claim 1, wherein the inclined surface includes four trapezoidal surfaces that are in contact with the sides of the plane.   The jig for measuring an alignment error of a flatbed scan module according to claim 2, wherein the inclinations of the four trapezoidal surfaces with respect to the plane are equal to each other. An alignment error measurement jig according to any one of claims 1 to 3, and an alignment error between the pair of laser oscillation units and the camera, the flatbed scan module, and the jig A method for measuring an alignment error with a target equipment provided with a flatbed scan module,
When aligning the pair of laser oscillation units and the camera, and the flatbed scan module and the target equipment, the camera captures a pair of reference lines formed by scanning the cross beam on the plane portion. Obtaining reference data
When an alignment error occurs between at least one of the pair of laser oscillation units and the camera and between the flatbed scan module and the target equipment, the cross beam is placed on the plane unit. Capturing a pair of measurement lines formed by scanning with the camera to obtain measurement data;
Comparing the reference data with the measurement data to calculate an error of the measurement data with respect to the reference data;
Alignment error measurement method for flatbed scan module including The reference data includes first reference coordinate values for both end points of the pair of reference lines,
5. The method for measuring an alignment error of a flatbed scan module according to claim 4, wherein the measurement data includes first measurement coordinate values for both end points of the pair of measurement lines. The reference data further includes a second reference coordinate value for the center point of each of the pair of reference lines,
6. The method for measuring an alignment error of a flatbed scan module according to claim 5, wherein the measurement data further includes a second measurement coordinate value with respect to a center point of each of the pair of measurement lines. The reference data further includes a length of each of the pair of reference lines,
The method of claim 5, wherein the measurement data further includes the length of each of the pair of measurement lines. The reference data further includes an inclination of the remaining reference line with respect to one reference line of the pair of reference lines,
The method of claim 5, wherein the measurement data further includes an inclination of a remaining measurement line with respect to one measurement line of the pair of measurement lines. The reference data further includes a thickness of each of the pair of reference lines,
6. The method for measuring an alignment error of a flatbed scan module according to claim 5, wherein the measurement data further includes a thickness of each of the pair of measurement lines.

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