JP2017068849A - Article assembling status information display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an article assembling status information display device in which a status after the assembling of a member or the like can be easily confirmed when assembling the member or the like as a final product, and a place and time of confirmation work are not constrained.SOLUTION: An article is photographed by a camera, and stored as a two-dimensional digital image. Three-dimensional CAD data are converted to a wire frame model, and applied with hidden-line removal, and operation information which is operated by being matched on a specific visual point which is substantially the same as the two-dimensional digital image with respect to the three-dimensional CAD data of the article which is applied with the hidden-line removal is stored in a tablet in advance. When confirming a status of assembling, a worker selects and calls out the two-dimensional digital image of an objective article from a file of the stored image everytime the worker confirms the assembling status, automatically calls out the three-dimensional CAD data which are applied with the hidden-line removal corresponding to the image, operates a controller attached to the tablet so that both the data and the image are extremely superimposed on each other, and displays them.SELECTED DRAWING: Figure 2

Description

  The present invention is an information display method for visually confirming the situation (referring to the overall shape and accuracy, etc.) of an article (a general term for parts, members, and products) using three-dimensional CAD data. For example, it can be used for assembling a steel frame by welding in the construction field.

  When assembling an article such as a steel frame by welding, etc., after performing temporary welding (hereinafter referred to as assembly welding) using an assembly jig for adjusting the shape, the final welding is performed. It is necessary to check the situation after assembly.

  Conventionally, generally, the overall shape after assembling members and the like has been confirmed visually, and the accuracy has been using a measuring instrument such as a ruler or an angle meter. However, when parts such as steel plates are assembled at an arbitrary angle and complicatedly assembled, simple mistakes such as assembly mistakes and forgetting assembly are likely to occur, and the installation angle and position of the completed member etc. It was extremely difficult to measure with good accuracy. In particular, it was difficult to find errors in the assembly process due to human errors.

  Therefore, whether there is no assembly error or forgetting assembly and the accuracy is within an acceptable range is determined by whether or not these components fit within the final product, so if there is a problem However, the members and the like are remade, which causes not only cost but also significant time loss.

  In order to prevent such nonconformity, a method using digital technology has been developed. For example, there is a method of confirming a discrepancy with the two-dimensional CAD data by superimposing the two-dimensional CAD data on an object such as a photograph. However, it cannot be applied when the object is three-dimensional.

  In addition, when the object is three-dimensional, the object is converted into digital data by measurement, and the three-dimensional CAD data of the accurate solid model in the design of the object is superimposed on the object, so that there is a discrepancy with the three-dimensional CAD data. There was a way to check. In this method, since pre-processing of converting the object into digital data by three-dimensional measurement is necessary, it is considerably large and requires labor and cost.

  For example, Patent Document 1 to Patent Document 4 are known as prior arts relating to a method for checking processing accuracy of members and the like using three-dimensional CAD data and preventing assembly errors.

  Patent Document 1 discloses an object existing in an image in an image recognition method in which an actual subject is imaged by a tomographic imaging apparatus and the captured tomographic image data is processed to determine the contour of an object part. This is a method of displaying the difference between the contour of the part and the image data in the vicinity of the contour of the object part at the time of design obtained from the CAD data which is the design information of the subject so as to clearly indicate the difference between the two contour parts. .

  Patent Document 2 uses a X-ray CT apparatus to generate a three-dimensional perspective image of a test object, and superimposes the three-dimensional perspective image of the three-dimensional CAD data that is the design data of the test object. It is a manufacturing error evaluation system for obtaining an error by moving each pixel of the three-dimensional CAD data by a predetermined calculation until they match.

  In Patent Document 3, an image of an assembly object to be assembled by an operator is imaged, a difference in three-dimensional coordinates between the lens position of the imaging means and the position of the operator's eyes is calculated, and the captured image data is added to the captured image data. Based on the three-dimensional design data of the various assembly objects registered in advance in the external storage device of the image processing apparatus, the three-dimensional design data of the assembly object is specified, and the difference already calculated is determined. Based on the converted viewpoint position information, the outline data of the assembly object is displayed on the basis of the converted viewpoint position information. Since the assembly target object is displayed on the screen as viewed from the operator, it is assumed that there is no mistake in the assembly direction.

  However, in the prior arts of Patent Documents 1 and 2, three-dimensional digital data of an object is obtained by using a tomographic imaging apparatus or an X-ray CT apparatus for an actual object (subject or test object). Since pre-processing of creating the image is necessary, a considerably large-scale device is required, and labor and cost are required. In addition, these prior arts are methods for comparing an object that is a three-dimensional object with three-dimensional CAD data and evaluating an error between the two objects. There is no idea of treating it as two-dimensional digital data), and therefore there is nothing to suggest about it.

  Further, Patent Document 3 displays a large number of various objects in the flow work by displaying the assembly object actually assembled by the worker according to the assembly procedure in a state viewed from the viewpoint of the assembly worker. It is intended to support the work so that the assembly position and direction of the parts are not mistaken, and it is not the purpose to confirm the state after the assembly of the members, that is, the overall shape and accuracy. In addition, this method sequentially repeats a series of procedures in which a single assembly object that has been carried is photographed on the spot and contour data is displayed from the corresponding three-dimensional design data based on the image data. Therefore, the place and time of collation work are limited.

  According to Patent Document 4, the “comparison unit” of the computer determines whether the position and orientation of the subassembly are correct as follows. The parts are assembled by the worker in the work area for assembly, and the parts are photographed from a fixed camera position. In the apparatus, a uniform work area visible from the camera position is stored in advance as a background image, and a difference image between the background image and a captured image after the parts are installed is identified. Further, the shape data of the part that can be seen from the camera position is stored in advance in the “shape recognition device”.

The “part discriminating unit” of the computer verifies whether the part to be installed is correct.
Based on the captured image of the subassembly by the camera, the “shape recognition device” recognizes the two-dimensional shape of the subassembly, and outputs the two-dimensional shape data as data indicating the assembled shape of the subassembly. .
On the other hand, a “three-dimensional shape model generation unit” of the computer generates a three-dimensional shape model in a state in which a plurality of components are combined corresponding to the photographed image, from the component identification information of the individual components.

The two-dimensional shape data created by projecting this three-dimensional shape data in the direction of the camera's viewpoint and the two-dimensional shape data of the photographed image are compared to determine whether the position and orientation of the assembly are correct. The “comparator” performs collation.
Therefore, the collation method is an internal process of the computer based on the component identification information, not the visual observation of the operator by superimposing the photographed image and the two-dimensional shape model, and information on whether the assembly state is correct or not is output.
In addition, when extracting a three-dimensional shape model in which a plurality of parts are combined, other parts are hidden so that the sub-assembly to be confirmed stands out on the monitor screen. At that time, hidden line processing is performed. .

  Although the collation method of Cited Document 4 is as described above, in order to recognize that it is a target part, a work area is stored in advance as a background image, and shooting after the background image and the part are installed It is necessary to recognize a difference image from the image. This is suitable when assembling parts by flow work, but cannot be applied in various environments such as construction factories or work sites in the field where steel structures are assembled by welding.

  The hidden line processing is only an operation performed when the sub-assembly to be confirmed is displayed on the monitor screen, and the hidden line processed 3D shape data is photographed for the purpose of determining the assembly status. It is not used as a means to superimpose on an image. And there is no description or suggestion about that. Moreover, the two-dimensional shape data created from the three-dimensional shape data is used for collation with the captured image that is the two-dimensional shape data, that is, the two-dimensional shape model is compared with the two-dimensional image. When the two-dimensional shape data generated by projecting from the shape data in the camera viewpoint direction includes an error that cannot be ignored, the generated two-dimensional shape data cannot be directly corrected and corrected. It is necessary to recreate accurate two-dimensional shape data from the three-dimensional shape data.

Furthermore, since the “comparison unit” of the computer as described above determines whether the assembly state is acceptable or not as an internal process as described above, it is necessary to install a necessary program.
As described above, the method of the cited document 4 has a problem that the place and time for checking the assembly status are restricted and the system becomes large.

Japanese Patent Laid-Open No. 09-204532 JP 2004-132944 A JP 2009-289046 A JP 2008-235504 A

  The present invention eliminates the need for a large-scale device when checking the condition after assembling such members so that the non-conformance that does not fit well when a member such as a steel frame is incorporated as a final product does not occur. Thus, it is an object to provide a display device for assembling information on articles using three-dimensional CAD data in which the location and time of the confirmation work are not limited.

The present invention includes a two-dimensional digital image input means for capturing a two-dimensional digital image of an article such as a member photographed by a camera at a work site into a computer
Two-dimensional digital image display means for displaying the two-dimensional digital image on a monitor screen;
Three-dimensional CAD data (design drawing) of the article stored in a storage medium or storage means provided in the computer is called up and displayed superimposed on a two-dimensional digital image of the article on the monitor screen CAD data calling means;
An assembly status information display device for an article comprising:
Two-dimensional digital image file storage means for storing a data file of a two-dimensional digital image of an article taken in from the two-dimensional digital image input means;
Convert the 3D CAD data of the solid model of the article into a wire frame model, extract the contour line, and display the line that should not be hidden behind the wire frame model with a broken line, a thin line, or another color. Or, hidden line processing means for performing hidden line processing to distinguish by completely hiding,
For the hidden line processed 3D CAD data subjected to the hidden line processing, information operated by a person such as a coordinate transformation matrix viewed from a specific viewpoint that is substantially the same as the 2D digital image of the article to be compared is saved as a management file. Management file storage means,
When checking the assembly status of an article, the data file of the two-dimensional digital image of the article stored in the two-dimensional digital image file storage means to be checked is designated, and the corresponding hidden line processed three-dimensional CAD is specified. Hidden line processed three-dimensional CAD data calling means for automatically calling data;
Manipulating (rotating, moving, enlarging, reducing) a slight shift in the overlapping of the contour lines of the image displayed on the monitor screen by the data file of the two-dimensional digital image and the hidden-line processed three-dimensional CAD data. A controller for fine tuning,
Is further provided.

  In the above-mentioned configuration, the hidden line is a computer equipped with a program that displays a two-dimensional digital image of the article, processes a three-dimensional CAD data of the article, automatically extracts a contour line, and performs a hidden line process. Using a tablet with a controller for manipulating (rotating, moving, enlarging, reducing) processed 3D CAD data, a rear camera attached to the tablet or wirelessly with the tablet as a camera used for photographing the article If a separate camera capable of communication is used, the apparatus can be made compact.

  If the camera can be separated from the tablet, the camera can be fixed with a tripod, etc., and the image on the monitor screen of the tablet will not be blurred, so there is no need to fix the tablet with a tripod, etc. It is also possible to move freely.

  Also, the hidden line processed three-dimensional CAD data corresponding to the solid model of the article is stored with the same file name as the data file of the two-dimensional digital image or with an associated file name, and a person can check the assembly status. When a data file of a two-dimensional digital image of an article whose assembly status is to be confirmed is called out from the stored two-dimensional digital image data file, the same file name or an associated file name is automatically created. If the configuration includes the related data calling means for calling the hidden line processed 3D CAD data stored in (2), the operation becomes easy and erroneous operation can be prevented.

  That is, a two-dimensional digital image taken by a person as viewed from the direction in which the assembly state of the article is to be confirmed is stored as an image file in a computer with a name, and generally matches the direction in which the assembly state of the article is to be confirmed. The hidden line processed three-dimensional CAD data corresponding to the solid model of the article that has been operated (rotated, moved, enlarged, reduced) by the user as a management file together with the operation information (coordinate conversion matrix, file storage location, etc.) The same name as the file is saved in the computer, so that when a person checks the assembly status, a two-dimensional digital image of the article whose assembly status is to be checked is stored in the stored image file. Each time a person selects and calls it, the hidden 3D file with the same file name as the file name of the 2D digital image The AD data, the computer can be called in the automatically the management file.

  If the names of the image file and management file corresponding to each other (excluding the extension) are matched, a two-dimensional digital image that is called by a person operating the computer is stored in the storage device of the computer. The computer refers to the corresponding three-dimensional CAD data together with operation information such as a coordinate transformation matrix stored in the management file having the same name as the image file, so that the specific viewpoint is adjusted in the direction in which the assembly status is to be confirmed. It is possible to immediately rearrange on the computer monitor screen.

  Therefore, it is possible to take one or a plurality of articles to be confirmed in advance, take them in a computer as a two-dimensional digital image, save them, and select and recall the necessary images as appropriate. It is not necessary to place the assembly status confirmation work by superimposing the three-dimensional CAD data of the article on the work site, and since the work can be performed even after leaving the work site, it is not limited in terms of time. Efficient.

  The procedure for confirming the assembly status of the articles using the present invention is shown as a flowchart as follows. The following procedures (1), (2), (1a), and (2a) can be executed in parallel.

Procedure (1): Each part of one or a plurality of manufactured articles is temporarily assembled by assembly welding and assembled into the shape of the design drawing.
Procedure (2): A specific viewpoint is determined from the direction in which the operator wants to check the assembly state of the article, and the image is captured by a camera, and the image is stored in a computer as a two-dimensional image file.

Procedure (1a): An operator creates a solid model (three-dimensional CAD data) from the design drawing of the target article.
Step (2a): The computer converts the solid model into a wire frame model (automatically extracts the contour line), performs hidden line processing, and stores the generated hidden line processed 3D CAD data in the computer. To do.

Procedure (3): The operator selects an image of the article to be confirmed from the image files saved in the procedure (2).
Step (4): The corresponding hidden-line processed three-dimensional CAD data is called up so as to roughly match the specific viewpoint of the image of the article selected in step (3), and the operator operates (rotates, moves, enlarges, reduces) And the operation information (coordinate conversion matrix, file storage location, etc.) is stored in the computer as a management file.

  Step (5): When confirming the assembly status of an article, if an image of the article to be confirmed is designated from the image files saved in step (2), the procedure is stored corresponding to that image. The computer automatically calls the hidden line processed 3D CAD data of (4). At this time, the hidden line processed three-dimensional CAD data stored in the procedure (4) generally matches the specific viewpoint of the image of the component, but there is a slight deviation in the overlapping of the outlines of the two. Therefore, for more accurate overlay, the operator operates the controller on the monitor screen and finely adjusts the contour line of the hidden line processed 3D CAD data by rotating, moving, enlarging, and reducing. Do.

  Procedure (6): The degree of coincidence (displacement) between the outline of the image of the article superimposed in the procedure (5) and the outline of the hidden line processed three-dimensional CAD data corresponding to the image is The operator visually determines whether or not it is an obstacle to incorporating the article as a product, and if there is a problem, the procedure returns to the procedure (1) to correct.

Step (7): If there is no problem in step (6), the parts of the article are fully welded to complete the assembly.
Step (8): Each article after completion of the assembly in step (7) is determined by a specific viewpoint from the direction in which the assembly status is to be confirmed, and the operator takes a picture with the camera, and the image is stored in the computer as an image file. .

Procedure (9): The operator selects an image of the article to be confirmed from the image file saved in the procedure (8).
Step (10): An operator operates (rotates, moves, enlarges, and manipulates the controller attached to the computer with the hidden line processed three-dimensional CAD data so as to substantially match the specific viewpoint of the image of the article selected in step (9). And is stored in the computer as a management file together with the operation information (coordinate conversion matrix, file storage location, etc.).

  Step (11): When checking the assembly status of an article, if an image of the article to be checked is specified from the image file saved in step (8), the procedure is stored corresponding to the image. The computer automatically calls the hidden line processed three-dimensional CAD data of (10). At this time, the hidden line processed three-dimensional CAD data saved in the procedure (4) generally matches the specific viewpoint of the image of the part, but there is a slight deviation in the overlapping of the contour lines of both. Therefore, superimposition with higher accuracy is performed by finely adjusting the controller on the monitor screen by rotating, moving, enlarging, and reducing the hidden line processed 3D CAD data.

Step (12): The degree of coincidence (displacement) between the contour line of the image of the article superimposed in the step (11) and the contour line of the hidden line processed three-dimensional CAD data corresponding to the image is An operator visually determines whether or not it is an obstacle to assembling an article as a product. If the degree of coincidence is satisfactory, the process is terminated. If the problem can be corrected even if there is a problem, the process is corrected and the process returns to step (8). If it cannot be corrected, it will be remanufactured.
If a tablet is used for the computer used in the above procedure, it is easy to move in the assembly work place, so that it is possible to confirm the assembly status flexibly and efficiently.

  In addition, the said outline is a part which becomes important when shape recognition, such as the edge line of the steel plate which is parts of articles, such as the said member, and the edge line of a hole, is carried out.

  Further, the image of the article photographed by the camera is stored after correcting distortion according to the lens characteristics of the camera.

  Since the present invention is used for confirming the assembly status of articles such as members by the means as described above, the following effects can be obtained.

(1) The object, such as a member, is not converted into digital data by three-dimensional measurement, but a two-dimensional digital image taken by a camera may be taken into a computer (tablet), so that it can be superimposed on three-dimensional CAD data. This pre-treatment is extremely simple and quick.

(2) When superimposing hidden line processed 3D CAD data on a 2D digital image, the controller attached to the tablet is used to adjust the overlap condition. However, it will be possible to operate successfully in a short time.

(3) If the tablet is used, the assembly status can be confirmed even at the actual location, so it is flexible and efficient.

(4) There is also a method of superimposing the 3D CAD data of the article on the spot on the 2D digital image itself of the target article immediately after being photographed on the spot using the tablet, but in that case, the work ends. Up to this point, there is a drawback that work on the next image cannot be started. In the present invention, it is possible to photograph a plurality of articles to be confirmed in advance from an arbitrary angle at which assembly status confirmation is desired, capture and store them in a computer as a two-dimensional digital image, and appropriately select and call the confirmation target image. Because it is not constrained where and time to work, it is more reasonable and efficient.

(5) Digitalization of target parts may be two-dimensional, and commercially available products can be used for cameras and tablets, and existing programs can be used to superimpose images and CAD models. is there.

(6) At the time of assembling an article such as a member, it is possible to discover the presence or absence of defects by human vision in a short time and easily, which contributes to the reduction of occurrence of nonconformity including human error of products.

(7) Significantly contributes to avoiding economic and time loss associated with product remanufacturing in the event of nonconformity.

It is a schematic diagram which shows the use condition of the apparatus of this invention. It is a figure which shows the structure and function of the apparatus of this invention. It is a flowchart which shows the procedure which confirms the assembly condition of articles | goods using this invention. It is a perspective view which shows an example of the confirmation target object of an assembly condition, (a) displayed including the outline which should be hidden and cannot be seen, (b) does not display the outline which should be hidden and hidden. It is a thing. 5 is a hidden line processed three-dimensional CAD model of a solid model of an object corresponding to FIG. 4. (Outline that should not be visible is also displayed with a thin broken line) It is a figure in the middle of operation which superimposes FIG.4 (b) and FIG. (The outline that should not be visible is hidden.) FIG. 6B is a diagram after completion of superposition of FIG.

  FIG. 1 is an example of the present invention, and is a schematic diagram showing a use situation of the apparatus of the present invention. A camera 11 for photographing the article 10, a computer that performs information processing on the three-dimensional CAD data, a tablet 12 that displays an image of the article 10, and a code 13 that connects the camera 11 and the tablet 12.

  The camera 11 is fixed by a tripod or the like so as not to blur the image, and is shot while focusing on a specific viewpoint of the article 10 (for example, the sphere center of the article 10). The photographed photographic image is transmitted as a digital signal to the tablet 12 through the code 13 and stored as two-dimensional digital image data. If the camera can transmit digital signals wirelessly, the code 13 is not necessary.

  Since the image of the monitor screen of the tablet 12 is not blurred because the camera 11 is fixed, the tablet 12 does not need to be fixed with a tripod or the like, and may be held by the operator 14.

FIG. 2 is a diagram showing the configuration and function of the apparatus of the present invention, and is as follows.
(1) The operator 14 takes a picture with the camera 11 while focusing on a specific viewpoint of the article 10.
(2) The captured two-dimensional image is named and stored in the storage device of the tablet 12.

(3) Separately, create a solid model (three-dimensional CAD data) from the design drawing of the article,
(4) The 3D CAD data is input to the tablet 12, converted into a wire model by a conversion program (creates 3D CAD data with hidden line processing), and further subjected to hidden line processing.
(5) The created hidden line processed three-dimensional CAD data is stored in the storage device of the tablet 12.

(6) Recalling the two-dimensional image data of the article 10 already saved in (2) and the corresponding hidden-line processed three-dimensional CAD data saved in (5) to make a specific viewpoint of the image data of the article 10 The operator 14 operates (rotates, moves, enlarges, reduces) the controller 12a attached to the tablet so that the hidden line processed 3D CAD data is substantially matched.
(7) Along with the operation information (coordinate conversion matrix, file storage location, etc.), a management file is stored in the storage device of the tablet 12 with the same name as the two-dimensional image data.

  (8) When checking the assembly status, the operator 14 selects any two-dimensional image data of the article 10 from the two-dimensional image data file of the article stored in (2) each time, and responds to it. The computer automatically calls the hidden line processed three-dimensional CAD data stored in (7), and displays it superimposed on the monitor screen of the tablet 12.

  (9) Here, the hidden line processed 3D CAD data displayed on the monitor screen is set so as to roughly match the specific viewpoint of the image data of the article 10. Since the degree of overlap is slightly larger, it is necessary to increase the overlap accuracy. Therefore, a controller 12a is attached to the tablet 12, and the operator 14 finely adjusts the controller 12a by operating (rotating, moving, enlarging, reducing) around the specific viewpoint of the image data of the article 10. Then, the contour line of the hidden line processed three-dimensional CAD data is displayed so as to overlap with the contour of the article 10 as much as possible.

  The above is the embodiment of the method and apparatus for displaying the assembly status information of the article of the present invention. Therefore, the operator 14 only has to check the above-described overlapping images on the monitor screen to see if there is a shift that may cause a problem somewhere between them.

  The procedure for confirming the assembly status of members and the like using the present invention will be described along the procedures (1) to (12) of the flowchart shown in FIG. 3, taking the members as shown in the perspective view of FIG. 4 as an example. . 4 includes a sphere 1, three rib plates 2, 3, 4, and a base plate 5. The sphere 1 has two holes 1 a, a rib plate 2 has holes 2 a and 2 b, and a base plate 5 has a base plate 5. Can visually recognize two holes 5a. In FIG. 4A, the outline that should be hidden and hidden is displayed as a thin dotted line.

  Procedure (1): The sphere 1 which is a part of the real member, the three rib plates 2, 3, 4 and the base plate 5 are assembled into the shape of the design drawing by assembly welding.

  Procedure (2): Next, the member temporarily assembled in Procedure (1) is photographed with a digital camera by determining a specific viewpoint (for example, the center of the sphere 1) from the orientation corresponding to FIG. Two-dimensional digital image data is saved as an image file on a computer (hereinafter referred to as a tablet). The photographed image of the member is as shown in FIG. 4B because the outline indicated by the thin dotted line is not visible in FIG. When the two-dimensional digital image data is stored in the tablet, the captured image is subjected to distortion correction in accordance with the lens characteristics of the digital camera.

  Procedure (1a): A solid model (three-dimensional CAD data) of this member is separately created from the design drawing of the member by using current size three-dimensional CAD software.

Step (2a): The solid model is converted into a wire frame model that represents only lines, and the contour line 6 is extracted as shown in FIG. 5, and then hidden line processing is performed. The hidden line processed three-dimensional CAD data is converted into a tablet. Save to.
In FIG. 5, a thin dotted line shows a contour line that should be hidden and hidden.

  Procedure (3): From the image file saved in the procedure (2), the image of the article to be confirmed, that is, FIG. 4B in this example is selected.

  Procedure (4): Call operation (rotation, movement) of the hidden line processed 3D CAD data of procedure (2a) so as to roughly match the specific viewpoint of FIG. 4B, which is an image of the article selected in procedure (3) , Enlarge, reduce), and store the operation information (coordinate conversion matrix, file storage location, etc.) as a management file on the tablet with the same name as the image file selected in step (3).

  Step (5): When checking the assembly status of the article, specify the target image (Fig. 4 (b)) from the image files of step (2) stored in the tablet, and use the same file name The hidden line processed 3D CAD data (FIG. 5) is automatically called together with the management file of the procedure (4). At this time, the hidden line processed three-dimensional CAD data (FIG. 5) stored in the procedure (4) generally matches the specific viewpoint of the image of FIG. 4B, but is incomplete as shown in FIG. It is the degree of overlap. Therefore, a visible outline (rib or hole edge) of the image of the article selected in the procedure (3) (FIG. 4 (b)), and a procedure (4) that is operated and stored corresponding to the image. By operating (rotating, moving, enlarging, reducing) the controller attached to the tablet so that the thick broken line of the contour line 6 shown in FIG. Fine-adjust and display on the monitor screen of the tablet as shown in FIG. 6 and 7, the thin broken line displayed in FIG. 5 is omitted.

  Step (6): In FIG. 7, the position of the hole 2b indicated by the arrow A is shifted below the normal position, and as indicated by the arrow B, the angle of the rib plate 3 in plan view (not shown). Is confirmed to deviate from the design drawing. The deviation confirmed in FIG. 7 can be corrected because it is a temporary assembly stage.

  Procedure (7): When there is no problem in the temporary assembly, the main assembly is performed to complete the assembly of the members.

  Procedure (8): Even if there is no problem during temporary assembly, there is a possibility that the position and angle may be slightly shifted during the main welding. Therefore, the members after assembly are the same as in Procedure (2). Then, the image is taken with a digital camera from the direction corresponding to FIG. 4A (FIG. 4B), the distortion of the taken image is corrected, and the two-dimensional digital image data is stored in the tablet as an image file.

  Step (9): From the image file saved in step (8), an image of the article to be confirmed, that is, in this example, FIG. 4B after completion of assembly is selected.

  Procedure (10): Calling operation (rotation, movement, enlargement) of the hidden line processed 3D CAD data of procedure (2a) so as to match the viewpoint of FIG. 4B which is the image of the article selected in procedure (9) ), And the operation information (coordinate conversion matrix, file storage location, etc.) is stored as a management file on the tablet with the same name as the image file selected in step (9).

  Step (11): When confirming the assembly status of the article, the target image (FIG. 4B) is designated from the image files of step (9) stored in the tablet, and the same file name is used. The hidden line processed 3D CAD data (FIG. 5) is automatically called together with the management file of the procedure (10). At this time, the hidden line processed three-dimensional CAD data (FIG. 5) stored in the procedure (4) is generally suitable for the specific viewpoint of the image of FIG. 4B, but is incomplete as shown in FIG. It is the degree of overlap. Therefore, superposition is performed by fine adjustment by an operator operating a controller attached to the tablet to rotate, move, enlarge, and reduce the outline of the three-dimensional CAD data.

  Step (12): If the result of overlay confirmation in step (11) shows that there is no deviation exceeding the allowance for incorporating this member as a final product, the process is completed. Is divided into two. In other words, since the welding is performed, the possibility of correction is limited during the temporary assembly, but for example, if correction by heating is allowed for a slight angle error of the rib plate, the correction is made. Return to step (8). If such correction cannot be performed, the member itself is remanufactured.

  Although a tablet is used as the computer used in the above procedure, it is preferable that the assembly status can be confirmed efficiently and efficiently because it can be easily moved in the assembly work place.

  The present invention can display information on the assembly status of articles such as complicated members, which has been difficult with the conventional method, on the monitor screen of the tablet in an easy-to-read manner, and is simple, quick, and mobile without being restricted by location and time. Therefore, it contributes to the prevention of non-conformity in the assembly of articles such as members and the reduction of economic and time loss associated therewith.

1: Sphere 1a: Sphere Hole 2, 3, 4: Rib Plate 2a, 2b: Hole in Rib Plate 2 5: Base Plate 5a: Hole in Base Plate 5 6: Outline of Solid Model of Part 10: Article 11: Camera 12 Tablet 12a: Controller 13: Code 14: Worker A, B: Deviation position of assembly

Claims (3)

Two-dimensional digital image input means for importing into a computer a two-dimensional digital image of an article photographed by a camera at a work place;
Two-dimensional digital image display means for displaying the two-dimensional digital image on a monitor screen;
3D CAD data calling means for calling 3D CAD data of the article stored in a storage medium or a storage means provided in the computer and displaying the 3D CAD data superimposed on the 2D digital image of the article on the monitor screen When,
An assembly status information display device for an article comprising:
Two-dimensional digital image file storage means for storing a data file of a two-dimensional digital image of an article taken in from the two-dimensional digital image input means;
Hidden line processing means for converting the three-dimensional CAD data of the solid model of the article into a wire frame model, extracting a contour line, and performing a hidden line process for distinguishing lines that should be hidden from the wire frame model;
Management file storage means for storing, as a management file, information viewed from substantially the same specific viewpoint as the two-dimensional digital image of the article to be compared for the hidden line processed 3D CAD data subjected to the hidden line processing,
Hidden line processed 3D which designates a data file of the 2D digital image of the article stored in the 2D digital image file storage means to be confirmed and automatically calls the corresponding 3D CAD data which has been processed CAD data calling means;
A controller for manipulating and fine-tuning the deviation of the overlapping of the contour lines of the image displayed on the monitor screen by the data file of the two-dimensional digital image and the hidden line processed three-dimensional CAD data;
An assembly status information display device for an article, further comprising:   2. The article assembly status information display device according to claim 1, wherein a two-dimensional digital image of the article is displayed, three-dimensional CAD data of the article is processed, contour lines are automatically extracted, hidden lines are processed and displayed. A computer having a controller for operating the hidden line processed three-dimensional CAD data, and a camera used for photographing the article is a rear camera attached to the tablet, or the tablet An assembly state information display device for articles, which is a separate camera capable of wireless communication.   3. The article assembly status information display device according to claim 1, wherein the hidden line processed three-dimensional CAD data corresponding to the solid model of the article is associated with the same file name as the data file of the two-dimensional digital image or associated with the data model. When the data file of the 2D digital image of the article for which the assembly status is to be confirmed is called out from the stored data file of the 2D digital image stored in the file name, it is automatically associated with the same file name or associated. An article assembly status information display device comprising related data calling means for calling hidden line processed three-dimensional CAD data stored under a file name.

Images