JP6935033B1 - How to convert a bridge completion drawing to 3D data - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a conversion method capable of easily and accurately generating three-dimensional data relating to the latest state of a bridge from a completed drawing left on a microfilm. SOLUTION: A first digital image data and a second digital image data are recorded from a first microfilm 20a on which a completion drawing of a new construction work is recorded and a second microfilm 20b on which a completion drawing of a repaired part is recorded, respectively. The process of acquiring and recording the data in association with the structure name for each construction, the process of reading the coordinate data from the linear diagram converted into digital image data, and recording the score and the coordinate data in association with each other, and the bridge related to the new construction. The process of composing the three-dimensional data of the above, the process of composing the three-dimensional data related to the repair work, and the elements corresponding to the three-dimensional data related to the repair work in the three-dimensional data related to the new construction work are related to the repair work. It is characterized by having a step of performing a replacement process of replacing with dimensional data. [Selection diagram] Fig. 1

Description

The present invention relates to a technique for leaving a drawing of a completed bridge as digital data, which is related to bridge construction.

The completed drawings of bridges are stored on microfilm by the ordering party and the contractor, but they are being collected because they are created not only for new construction work but also for repair work and seismic retrofitting work. In addition, it is not always well preserved in many institutions, and the film itself can cause vinegar syndrome, leading to non-reproducibility. As a technique for converting such microfilm into digital data, for example, those disclosed in Patent Document 1 are known. That is, the microfilm is photographed with a digital camera and recorded as digital image data.

JP-A-2009-130514

Certainly, according to the above technique, it is considered that it is possible to prevent the film from becoming unreproducible due to deterioration of the film.
On the other hand, as for the bridge itself, there are many bridges that have changed their appearance from the time of new construction due to repair work centering on damaged parts and repair work such as seismic retrofitting work due to long-term service. Since bridge maintenance activities will continue for a long period of time, it is desirable to build a system in which the ordering party and the contractor view and update common data. In the future, as CIM activities begin in earnest, it is planned to manage bridges with 3D information, and there is an urgent need to convert existing 2D bridge data into 3D.

With the current technology, if the two-dimensional data is CAD data for design, it is easy to make it three-dimensional. However, as described above, the digital data obtained by photographing the microfilm is image data and cannot be used as it is as CAD data for design.

In addition, in the repair work, it may be difficult to grasp the latest state of the bridge as a whole from the drawing because the completed drawing of the entire bridge does not always remain.

Therefore, an object of the present invention is to provide a conversion method capable of easily and accurately generating three-dimensional data relating to the latest state of a bridge from a completed drawing left on a microfilm.

The method of converting the completed drawing of the bridge to the three-dimensional data according to the present invention for achieving the above object is from the completed drawing of the bridge using a reading means and a three-dimensional processing means having a storage unit and a calculation unit. This is a method of converting to three-dimensional data, in which the first microfilm on which the completion drawing of the new construction work is recorded and the second microfilm on which the completion drawing of the repaired part is recorded are read by the reading means, respectively. The first digital image data and the second digital image data are acquired, and the acquired first digital image data and the second digital image data are stored in association with the structure name for each construction via the calculation unit. The grade is detected via the calculation unit from the process recorded in the unit and the linear diagram of the completed drawing of the new construction and the completion drawing of the repair work converted into digital image data, and is recorded in the score. The process of reading the coordinate data and recording the score and the coordinate data in the storage unit is associated with each of the grades related to the completion drawing of the new construction via the calculation unit. The coordinate data is given, projected onto the first spatial coordinate system, and a line connecting the grades whose coordinate data are adjacent positions is arranged in the first spatial coordinate system to form 3 of the bridge related to the new construction. The associated coordinate data is given for each of the grades related to the completion drawing of the partial repair work through the process of constructing the three-dimensional data and the calculation unit, and projected onto the second spatial coordinate system. In the process of arranging the lines connecting the grades whose coordinate data are adjacent positions in the second spatial coordinate system to form the three-dimensional data related to the repair work, and through the calculation unit, the new construction work It is characterized by having a step of performing a replacement process of replacing an element corresponding to the three-dimensional data related to the repair work with the three-dimensional data related to the repair work in the three-dimensional data.

Further, in the method of converting a completed drawing of a bridge having the above-mentioned characteristics into three-dimensional data, attributes are associated with each of the components converted into digital image data and stored in the storage unit, and the components are stored. The material, plate thickness, and coating of the steel material of the above should be determined by the above attributes. With such a feature, it is not necessary to model the plate thickness portion for a portion such as a secondary member where the plate thickness does not need to be displayed. Therefore, three-dimensional data modeling becomes easy.

According to the method of converting a completed drawing of a bridge having the above characteristics into 3D data, it is possible to easily and accurately generate 3D data related to the latest state of the bridge from the completed drawing left on the microfilm. Is possible.

It is a figure which shows the schematic structure of the conversion system which concerns on embodiment. It is a figure which shows the image of the linear diagram of a bridge converted into digital image data. It is a figure which shows the state which projected the grade point detected from the alignment figure on the space coordinate system. It is a figure which connects the grades projected on the space coordinate system with a line, and shows the state which projected the linear figure on the space coordinate system. It is a flow chart for demonstrating the method about the conversion from the completion drawing written on the microfilm to three-dimensional data. It is a figure which shows the 3D data model of a main girder. It is a figure which shows the state which the 3D data model of a main girder is aligned with the linear figure projected on the space coordinate system. It is a figure for demonstrating the addition of a plate thickness to a 3D data model. It is a figure which shows the 3D data model of the reinforcing bar structure for constructing a deck. It is a figure which shows the 3D data model of a bearing. It is a figure which shows the arrangement structure of the bearing with respect to a main girder. Of the three-dimensional data models of bridges related to new construction, (A) is a plan view and (B) is a side view. Of the three-dimensional data models of the bridge after the repair work, (A) is a diagram showing a plane configuration and (B) is a diagram showing a side configuration.

Hereinafter, embodiments relating to a method for converting a completed drawing of a bridge of the present invention into three-dimensional data will be described in detail with reference to the drawings. It should be noted that the embodiments shown below are a part of a suitable embodiment for carrying out the present invention, and as long as the effect is exhibited, the present invention may be modified even if a part of the configuration or method is changed. Can be considered as part of.

[composition]
First, with reference to FIG. 1, a configuration example of a system (hereinafter, simply referred to as a conversion system 10) for implementing a method of converting a completed bridge drawing to three-dimensional data according to the present embodiment will be described. The conversion system 10 according to the present embodiment is basically composed of a reading means 12 and a three-dimensional processing means 14, and is accompanied by an input means 16 and a display means 18.

The reading means 12 records the microfilm recording the completed drawing of the bridge (in the present embodiment, the microfilm recording the completed drawing before the repair is the first microfilm 20a, and the completed drawing after the repair is recorded. This is an element for converting the microfilm (referred to as the second microfilm 20b) into digital image data. The specific configuration of the reading means 12 is not limited, but a general microfilm scanner, a digital camera having a defined angle of view, or the like may be used.

The three-dimensional processing means 14 is an element for creating three-dimensional data based on the digital image data of the completed drawing read through the reading means 12. The three-dimensional processing means 14 according to the embodiment has at least a storage unit and a calculation unit (both are not shown). The storage unit is an element for recording digital image data acquired via the reading means 12 in association with a structure name for each construction work, as well as for recording programs and the like required for various processes. Here, the construction refers to repair work for the bridge, such as repair work and seismic retrofitting work, in addition to new construction work. Further, the structure name may be read from the digital image data of the completed drawing via a program for reading characters or the like, or may be input via an input means 16 whose details will be described later. The structure name is the name specified in each drawing or structure such as general map, linear map, main girder, anti-tilt structure, cross girder, horizontal structure, bearing, drainage device, telescopic device, bridge collapse prevention device, inspection path, etc. All you need is. Further, in the present embodiment, in addition to the structure names shown in each figure, the attributes corresponding to each constituent member are also recorded. The attributes referred to here indicate, for example, the material, plate thickness, and coating system of the steel material.

The calculation unit is an element for developing a program recorded in the storage unit and performing a process of creating three-dimensional data from the digital image data recorded for each construction. The calculation unit according to the embodiment first detects the grade from the linear diagram as shown in FIG. 2 of the completed drawings converted into digital image data (note that in FIG. 2, the specifics showing the coordinates of the grade). Numerical values are omitted). Next, the coordinate data written in the grades of the detected linear diagram is read, the grades and the coordinate data are associated with each other, and the processing is performed to record them in the storage unit.

Further, the calculation unit performs a process of projecting the score associated with the coordinate data onto the spatial coordinate system as shown in FIG. The points indicated by white circles in FIG. 3 are the positions indicating the three-dimensional coordinates of the grades detected from the linear diagram shown in FIG. Further, the calculation unit performs a process of arranging a line connecting the points whose coordinate data are adjacent positions in the spatial coordinate system according to the linear diagram converted into digital image data, so that the spatial coordinates are as shown in FIG. Project a linear diagram onto the system.

Next, the calculation unit creates individual 3D data models based on the plan view and cross-sectional view of the incidental structure according to the structure name, and combines this with the linear diagram projected on the spatial coordinate system. .. The three-dimensional data modeling of the ancillary structure and the projection onto the spatial coordinate system are performed from the main girder, and the processing proceeds so as to combine the anti-tilt structure, the horizontal girder, the horizontal structure, the floor slab, and the bearing with the main girder as the base point.

Each component is formed by a line, and the plate thickness is determined by the attribute corresponding to the component. Therefore, in the storage unit, the plate thickness is recorded for each attribute of the constituent members constituting the bridge. Further, for ancillary structures such as a telescopic device, a bridge collapse prevention device, and a drainage device whose plate thickness and the like cannot be determined, the shape thereof may be simply modeled as a three-dimensional data and projected onto a part specified in the spatial coordinate system.

The input means 16 is an element for inputting supplementary information for recording digital image data, such as a name (structure name) for the structure of the completed drawing written on the microfilm 20, as needed.

The display means 18 is for visually displaying the data input by the input means 16, the digital image data acquired by the reading means 12, the three-dimensional data converted via the three-dimensional processing means 14, and the like. It is an element.

[How to create 3D data]
Next, the conversion of the bridge from the completed drawing to the three-dimensional data by the conversion system having the above configuration will be described with reference to FIG. First, the first microfilm 20a on which the completion drawing in the new construction work is recorded is set in the reading means 12, the analog data is converted into digital image data, and the digital image data (first digital image data) of the completion drawing is acquired. do. The acquired digital image data is recorded in the "new construction" folder (step 10: acquisition of digital image data (new construction)).

Next, in the same manner as in step 10, the second microfilm 20b on which the completion drawing in the repair work is recorded is set, converted from analog data to digital image data, and the digital image data of the completion drawing (second digital image data). ) To get. Here, the acquired digital image data is recorded in a folder with a predetermined repair work name (for example, “repair work”). If the repair work is carried out a plurality of times, the conversion process to digital image data will be repeated a plurality of times for each work. In the present embodiment, in order to simplify the explanation, the following explanation will be given assuming that the number of repair works is one (step 20: acquisition of digital image data (repair work)).

Next, the three-dimensional processing means 14 selects a linear diagram based on the structure name from the completed drawings converted into digital image data for each construction, and detects the grades written on the linear diagram. The detection of the grade is performed by detecting the point on which the coordinate data is written, and the detected grade is recorded in the storage unit after the coordinate data written in the digital image data is associated with the detected score. .. Here, the characters and numbers (coordinate data, etc.) written in the digital image data may be read by a general image processing program. In addition, the correspondence between the grade and the coordinate data is recognized as the coordinates corresponding to the grade when it is judged as "match" by the program that judges the match or mismatch of the correspondence between the read characters and numerical values. , You should make an association. Specifically, in each of the plan view and the cross-sectional view in FIG. 2, the rating corresponding to L1 indicated by the leader line corresponds to L1 in the table showing the coordinate data, and A1 indicating one end to one end of the bridge, respectively. With respect to having coordinates corresponding to X, Y, and Z from A2 to A2, the judgment and the certification may be repeated and the association may be performed (step 30: detection of the score).

After detecting the grades and associating the coordinate data, the coordinate data associated with each detected grade is given and projected onto the spatial coordinate system (see FIG. 3). After projecting the grades on the spatial coordinate system, the linear diagram is projected onto the spatial coordinate system by arranging the lines connecting the adjacent grades on the spatial coordinate system based on the linear diagram (see Fig. 4). ) Is completed (step 40: projection of a linear diagram onto a spatial coordinate system).

After projecting the linear diagram onto the spatial coordinate system, the incidental structure is projected. The incidental structure is a procedure for projecting the main girder, which is the main part of the bridge, and then projecting the anti-tilt structure, cross girder, horizontal structure, deck, bearing, drainage device, telescopic device, bridge collapse device, inspection path, etc. It should be done.

As for the incidental structure, first, a three-dimensional data model is created based on a plan view or a cross-sectional view converted into digital image data. When a three-dimensional data model of the main girder is created as shown in FIG. 6, the alignment is performed based on the plan view and the cross-sectional view with reference to the linear diagram projected on the spatial coordinate system, and as shown in FIG. All you have to do is project it onto the spatial coordinate system. Here, attributes are associated with each of the components converted into digital image data. Therefore, each constituent member is given a thickness and a shift amount according to the associated attributes after being three-dimensionally data-modeled by a diagram. For example, in the case of the I-digit, which is a constituent member of the main girder as shown in FIG. 8, the initial three-dimensional data model is a diagram shown by a solid line in the figure. On the other hand, when the thickness based on the attribute is given, a model of the appearance shown by the broken line in FIG. 8 is formed.

Here, the model based on the diagram is a portion that serves as a reference for dimensions in the drawing, and the plate thickness is given in the direction of maintaining this dimension. For example, in the case of flanges located above and below the I girder, the plate thickness is given to the opposing flange side (inside). On the other hand, in the case of the thickness of the web, the thickness is evenly applied to both side surfaces of the web based on the diagram. Further, in the case of overlapping constituent members such as splicing plates, the thickness according to the attribute is given after giving a shift amount corresponding to the thickness of the web (1/2 of the thickness). It becomes.

Next, in the case of a floor slab, the structure of the reinforcing bar is acquired based on the plan view and the cross-sectional view, and a three-dimensional data model as shown in FIG. 9 is created. A 3D data model of the concrete structure is added to the 3D data model that reproduces the reinforcing bars (not shown), and this is projected onto the spatial coordinate system. Projection to the spatial coordinate system may be performed with reference to the three-dimensional data model of the main girder already projected on the spatial coordinate system.

Similarly, in the case of a bearing, a three-dimensional data model of the bearing as shown in FIG. 10 is created based on a plan view and a cross-sectional view. The created 3D data model may be projected onto the spatial coordinate system with reference to the 3D data model of the main digit. Specifically, as shown in FIG. 11, it may be arranged directly below the sole plate provided at the lower part of the lower flange of the main girder. It should be noted that the alignment may be based on the numerical values described in the plan view and the cross-sectional view.

Furthermore, although not shown, drainage devices, telescopic devices, bridge collapse prevention devices, inspection paths, etc. are also projected onto the spatial coordinate system in sequence after creating individual 3D data models, as with decks and bearings. You can do it. Similarly, for the structure added by additional work or another work, the three-dimensional data is modeled and then projected onto the spatial coordinate system to be reflected in the three-dimensional data (step 50: spatial coordinates). Projection of ancillary structures on the system).

As described above, for example, a three-dimensional data model of a bridge at the time of new construction as shown in FIG. 12 (in the example shown in FIG. 12, two-dimensional with FIG. 12 (A) as a plan view and FIG. 12 (B) as a side view). After creating the data model), a three-dimensional data model of each structure related to the repair work is created in the same manner as described above. The structure associated with the repair work in this embodiment is a model showing a state in which mortar or the like is injected to make the floor slab provided with a telescopic device a continuous structure at the time of new construction work, or a seismic isolation rubber bearing. This refers to parts whose structure has been modified due to repairs, such as models with seismic isolation bearings and other telescopic devices.

Here, the spatial coordinate system that projects the three-dimensional data model related to the new construction work and the spatial coordinate system that projects the three-dimensional data model related to the repair work may be separate spatial coordinate systems. That is, when the spatial coordinate system that projects the 3D data model related to the new construction is the first spatial coordinate system, the spatial coordinate system that projects the 3D data model related to the repair work is the second spatial coordinate system. Just do it. This is because the configuration of each construction can be clarified by adopting such a method.

After creating a 3D data model of each structure associated with the repair work, each structure is projected onto the first spatial coordinate system and replaced with the corresponding structure in the previous 3D model. By performing such processing, if there is a corresponding structure, the corresponding part will be replaced with the repaired structure. On the other hand, when there is no corresponding structure, the structure of the relevant portion maintains the previous structure.

As shown in FIGS. 13A and 13B, the three-dimensional data model subjected to the replacement process in this way shows the entire structure of the bridge after the repair (step 60: in the repair work). Replacement of such structure).

[effect]
According to the conversion method to 3D data using the conversion system 10 having the above configuration, the 3D data related to the latest state of the bridge is easily and accurately generated from the completed drawing left by the microfilm 20. It becomes possible. Moreover, not only the latest state but also the configuration related to the repair work is added and replaced sequentially from the new construction work, so that the previous state can be restored with the three-dimensional model as needed. In addition, as a matter of course, the current state of the bridge can be shared with the ordering party (manager) and construction-related contractors as a three-dimensional data model.

When projecting the 3D data model onto the spatial coordinate system, if there is a location where the models interfere with each other, processing such as changing the color of the 3D data and displaying it is performed as a location to be confirmed. It is good to do so. This is because if there is an error in reading the numerical value at the point to be confirmed, it is necessary to input the correct numerical value via the input means. In addition, if there is an actual design mistake, there is a possibility that on-site adjustments have been made, so by clearly indicating the points to be confirmed, it is easy to feed back this when confirming the site. Become.

In the present invention, it is described that the completed drawing recorded on the microfilm is converted into three-dimensional data mainly for the bridge, but it can be applied to the completed drawing of other structures.

10 ……… Conversion system, 12 ……… Reading means, 14 ……… Three-dimensional processing means, 16 ……… Input means, 18 ……… Display means, 20a ……… First microfilm, 20b… … The second microfilm.

Claims (2)

It is a method of converting a completed drawing of a bridge into three-dimensional data by using a reading means and a three-dimensional processing means having a storage unit and a calculation unit.
The first digital image data and the second digital image are obtained by reading the first microfilm on which the completion drawing of the new construction work is recorded and the second microfilm on which the completion drawing of the repaired part is recorded by the reading means, respectively. A step of acquiring data and recording the acquired first digital image data and the second digital image data in the storage unit in association with the structure name for each construction via the calculation unit.
From the linear diagram of the completed drawing of the new construction work and the completed drawing of the repair work converted into digital image data, the grade is detected via the calculation unit, and the coordinate data written in the grade is read and described. A step of associating a rating point with the coordinate data and recording it in the storage unit,
Through the calculation unit, the associated coordinate data is given to each of the grades related to the completion drawing of the new construction, and the coordinate data is projected onto the first spatial coordinate system, and the coordinate data becomes the adjacent position. The process of arranging the lines connecting the points in the first spatial coordinate system to compose the three-dimensional data of the bridge related to the new construction, and
The associated coordinate data is given to each of the grades related to the completion drawing of the partial repair work via the calculation unit and projected onto the second spatial coordinate system, and the coordinate data becomes an adjacent position. The process of arranging the lines connecting the grade points in the second spatial coordinate system to compose the three-dimensional data related to the repair work, and
A step of performing a replacement process of replacing the element corresponding to the 3D data related to the repair work with the 3D data related to the repair work in the 3D data related to the new construction work via the calculation unit.
A method of converting a completed drawing of a bridge into three-dimensional data. Attributes are associated with each of the components converted into digital image data and stored in the storage unit.
The method for converting a bridge completion drawing to three-dimensional data according to claim 1, wherein the material, plate thickness, and coating of the steel material of the constituent member are determined by the above attributes.

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