JP2007206956A - Cad data identity guarantee server device and cad data identity guarantee method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently identify electronic data for a drawing. <P>SOLUTION: Input CAD data are converted into data in a common format, and compared with original data, so that it is possible to confirm identity regardless of the file format of the original CAD data. Also, the CAD data input from the orderer of a design or construction for confirming identity with the original are defined as original data, and stored with a time stamp, and the original data are compared with comparison target data, so that it is possible to easily confirm identity with the original. An identity certificate as the comparison result and drawing data are printed out, so that it is possible to secure evidence in conflict or the like. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a CAD data identity guarantee server device and a CAD data identity guarantee method, and more particularly to a CAD data identity guarantee server device and CAD data identity for guaranteeing identity with an original for CAD data relating to architecture and civil engineering drawings. It relates to the guarantee method.

  When a national or local public organization orders a construction work and the contractor receives an order, it confirms the identity of the order drawing, which is the drawing at the time of placing the order, and the drawing used by the contractor for the construction or work. Is a problem. In other words, design changes may be required in order to ensure the strength of the construction structure during construction or work. This design change is often based mainly on proposals from the contractor. Upon receiving this proposal, the orderer enters into a change contract with the contractor.

When such a design change is made, if the management is not performed properly, there is a discrepancy between the contents of the drawings that the orderer has as the original and the contents of the drawings that the contractor uses for construction and work. Arise. In such a case, if it is a drawing based on a paper medium, it is possible to easily confirm the identity by comparing and collating the drawings by adopting a well-known method such as clarifying the changed portion by writing in red. It was.
In recent years, ordering drawings as electronic data are often transferred from the orderer to the contractor, and the contractor side processes the drawing into a drawing necessary for construction or work. In addition, there is a movement to electronically replace the contract action. In this case, electronic data needs to be managed as an original.

  For example, in Patent Document 1, the correspondence between the design drawing in the design database and the construction drawing (paper base) used in the site construction cannot be directly obtained, and even if a specific construction drawing is changed locally, it is easy Describes a technique for solving the problem that it cannot be reflected in all related drawings in the design database. That is, Patent Document 1 discloses an image reading apparatus for reading a construction drawing in which correction points are written in red, an image database in which all image information of the original construction drawing is registered, and a construction drawing of the image database. A mesh information database for registering mesh parameters for subdividing image information into one or more regions and drawing numbers of one or more related drawings to be associated with the subdivided regions, and all necessary for plant design A design support system including a design database in which CAD drawings are registered and a related information database in which related information on CAD drawings registered in the design database is registered is described. Then, the drawing number is extracted from the image data captured by the image reading device, the construction drawing having the same drawing number is searched from the image database, and the construction drawing image data read by the image reading device and the image database are searched. The image data area of the completed construction drawing is subdivided using the mesh parameters of the mesh information database, and the difference amount between the two image data is obtained for each resolution in the resolution unit. Whether the image data is the same or not is determined. Further, narrowing down the red writing part which is the correction part, that is, specifying one or a plurality of areas including the red writing part, and the related information database and the design database based on the related drawing number associated with the area. All the related drawings are searched from and the relation is displayed on the display device.

If the design support system configured as described above is used, a construction drawing in which correction points are marked in red is taken as image data, and the area of the image data and the image data of the original construction drawing is subdivided using mesh parameters. For each of the subdivided areas, the difference amount between the two image data is obtained in units of resolution, and whether there is a correction based on whether the two image data are the same is determined according to the difference amount. By identifying and automatically searching for related drawings from the setting database based on the drawing number associated with the area and displaying all of them on the screen, the related drawings can be reduced by the designer. Search omission can be prevented.
Japanese Patent Laid-Open No. 10-283393

  When the ordering drawings as electronic data are transferred from the orderer to the contractor, and the contractor performs processing into drawings necessary for construction and work, the ordering drawings and drawings used by the contractor for the work and work It is difficult to confirm the identity. That is, electronic data about a drawing is usually in a unique file format by CAD (Computer Aided Design) software (hereinafter referred to as CAD software as appropriate) which is application software for handling the drawing. It is difficult to confirm the identity by comparing each other. That is, since the storage order of drawing elements such as line segments, broken lines, dots, and circles constituting a file differs depending on CAD software, it is difficult to compare data created by different CAD software.

  When checking the identity of electronic data for a drawing, even if the file format such as the storage order is different, if the substantial contents indicated by the drawing are the same, it should be determined that there is identity. In other words, if the construction structures obtained by working or construction using the drawings are substantially the same, the difference in the file format should not be an element that hinders the identity of the electronic data.

In such a situation, it may be possible to determine the identity by visually confirming the contents displayed on the screen of a personal computer or the like. However, there is a problem that such confirmation work takes time and effort and is not efficient. In addition, there are many fears of oversight, and the originality cannot be confirmed. Such a problem cannot be solved by the technique described in Patent Document 1.
The present invention has been made in order to solve the above-described problems of the prior art, and an object of the present invention is to provide a CAD data identity assurance server apparatus and CAD data identity that can efficiently check the identity of electronic data for a drawing. It is to provide a sex guarantee method.

  The identity guarantee server device according to claim 1 of the present invention provides the identity of CAD data comprising drawing elements constituting a drawing and parameters defining how the drawing element is represented in the drawing. An identity guarantee server device for guaranteeing original data storage means for storing CAD data input from an orderer as original data together with a time stamp, and data acquisition means for acquiring comparison target data to be compared with the original data And comparison means for comparing the data acquired by the data acquisition means with data stored in the original data storage means, and output means for outputting the comparison result of the comparison means. . The CAD data input from the orderer is used as original data, stored together with a time stamp, and compared with this data to be compared, the content identity with the original can be easily guaranteed. Moreover, the evidence ability in a dispute etc. can be ensured with drawing data together with the identity certificate which is the comparison result.

The CAD data identity assurance server device according to claim 2 of the present invention is the CAD data identity server device according to claim 1, wherein the CAD data further includes an attribute information element related to the data,
The comparison means also compares the attribute information elements. About the CAD data to which the attribute information element is added, it is possible to easily guarantee the identity by performing a comparison process between the attribute information elements, and with the drawing data together with the identity certificate as the comparison result, Evidence capacity in disputes can be secured.

The CAD data identity guarantee server device according to claim 3 of the present invention further includes storage means for storing the CAD data together with the parameters in separate arrays according to claim 1 or 2,
The comparison means sequentially compares the elements stored in the array, and when the comparison results in a one-to-one correspondence between all the elements, the original data and the comparison target data Are determined to be the same. By sequentially comparing the drawing elements, the content identity of the data can be confirmed. Here, the data to be compared by the comparing means is the case where the converted data converted into the common format is acquired by the data acquiring means and the converted data converted into the common format after being acquired by the data acquiring means. It doesn't matter which case it is.

  The CAD data identity assurance server device according to claim 4 of the present invention is the data in a common format according to any one of claims 1 to 3, wherein the input CAD data can be compared with the original data. And a data format conversion means for converting the data into the data format, and the comparison means compares the data converted by the data format conversion means. By converting the data into the common format data and comparing it with the original data, it is possible to confirm the content identity of the data regardless of the file format of the original CAD data.

  The CAD data identity guarantee server device according to claim 5 of the present invention is the CAD data identity guarantee server device according to claim 4, wherein the data format conversion means performs SXF conversion on the input CAD data, and p21 format data obtained by the SXF conversion, and One of the sfc format data is common format data. By performing SXF conversion on the input CAD data, the content identity of the CAD data can be confirmed using the p21 format or the sfc format as a common format. Here, SXF is a standard CAD data format compliant with ISO10303 (commonly referred to as STEP), and there are two types of physical file formats, p21 format and sfc format. The p21 format is adopted as a standard format when delivered to the Ministry of Land, Infrastructure, Transport and Tourism.

  The CAD data identity assurance server device according to claim 6 of the present invention further includes a correction history storage means for storing a correction history of the CAD data according to any one of claims 1 to 5, The output means also outputs the stored contents of the correction history storage means. If the comparison results are not the same, the responsibility relationship can be grasped by outputting the correction history of the CAD data and checking the contents.

  The CAD data identity assurance server device according to claim 7 of the present invention is the CAD data identity guarantee server device according to claim 6, wherein the correction history specifies at least a correction content of the CAD data, a time stamp thereof, and a person who performed the correction. It is characterized by including corrector information. In this way, it is possible to confirm the details of correction, the time stamp such as the date and time, the corrector information such as the name and ID of the corrector, and the responsibility relationship can be understood in more detail.

  The CAD data identity guarantee method according to claim 8 of the present invention is a CAD data identity method comprising drawing elements constituting a drawing and parameters defining how the drawing element is expressed in the drawing. Is an original data storage step for storing CAD data input from an orderer as original data together with a time stamp, and data for obtaining comparison target data to be compared with the original data An acquisition step; a comparison step for comparing the data acquired in the data acquisition step with the data stored in the original data storage step; and an output step for outputting a comparison result of the comparison step. To do. It is possible to easily guarantee the content identity with the original data by storing the CAD data input from the design or construction contractor as the original data, storing it with the time stamp, and comparing it with the data to be compared. it can. Further, by outputting the drawing data together with the identity certificate which is the comparison result, it is possible to guarantee the evidence ability in a dispute or the like.

  The CAD data identity assurance method according to claim 9 of the present invention is the CAD data identity method comprising drawing elements constituting a drawing and parameters defining how the drawing element is represented in the drawing. A data format conversion step for converting input CAD data into data in a common format that can be compared with original data, and a post-conversion converted in the data format conversion step A storage step for storing data in separate arrays together with the parameters, a comparison step for sequentially comparing elements after conversion by the data format conversion step, and a result of comparison by the comparison step, all elements When there is a one-to-one correspondence, the original data and the comparison target data are the same. Characterized in that it comprises a determining that it is. By converting the data into the common format data and comparing it with the original data, it is possible to confirm the content identity of the data regardless of the file format of the original CAD data.

As described above, according to the present invention, the content identity can be confirmed regardless of the file format of the original CAD data by converting the data into a common format and comparing it with the original data. effective.
In addition, CAD data input from the orderer who can confirm the identity of the original is used as the original data, which is stored together with the time stamp, and can be easily confirmed by comparing it with the data to be compared. it can.
Furthermore, since the present invention outputs an identity certificate as a comparison result for both the above-mentioned identity and identity with the original, a dispute or the like can be obtained using this certificate and drawing data. There is an effect that the evidence ability can be secured.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings referred to in the following description, the same parts as those in the other drawings are denoted by the same reference numerals.
(Example of overall system configuration)
FIG. 1 is a diagram showing an outline of a CAD data identity guarantee system configured using a CAD data identity guarantee server device according to the present invention. The CAD data identity guarantee server device 1 in FIG. 1 manages CAD data created by the orderer as original data, and the CAD data managed by the orderer and the ordering party is not different from the original data. It functions as a third-party certification body that guarantees

  In FIG. 1A, a CAD data identity guarantee server device 1 is connected to a network 100 such as the Internet, and an orderer side personal computer (hereinafter abbreviated as a PC) 2 and an orderer side PC 3 are also connected to the network 100. It is connected to the. In this state, the CAD data identity guarantee server device 1 can receive the CAD data from the orderer side PC 2 via the network 100, and also from the order side PC 3 via the network 100. Can be received. When CAD data is transmitted / received, encryption processing may be performed as necessary.

  In FIG. 5B, the orderer side PC 2 and the order side PC 3 are not connected to the network. In such a case, the CAD data identity assurance server device 1 writes the CAD data to a recording medium such as a flexible disk on the orderer side PC2 and the orderer side PC3, and mails the CAD data. It can be received from the orderer side PC 2 and can also be received from the order side PC 3.

(Configuration example of CAD data identity guarantee server device)
FIG. 2 is a block diagram illustrating a functional configuration example of the CAD data identity assurance server device according to the embodiment of the present invention. In the figure, a CAD data identity guarantee server device 1 includes an original data storage unit 11 for storing CAD data input from an orderer side PC as original data together with a time stamp, and comparison target data to be compared with original data. The data acquisition unit 12 to be acquired, the comparison unit 13 that compares the data acquired by the data acquisition unit 12 with the data stored in the original data storage unit 11, and the output unit that outputs the comparison result of the comparison unit 14, the data format conversion unit 15 that converts the input CAD data into data in a common format that can be compared with the original data, and the converted data converted by the data format conversion unit 15, together with parameters, respectively. And a storage unit 16 for storing the data in the array.

  In this example, the data format conversion unit 15 performs SXF conversion on the input CAD data. The p21 format data or the sfc format data obtained by the SXF conversion is used as common format data. In order to convert to a common format, it is necessary to grasp the data format of the input CAD data. In order to grasp the data format, it is only necessary to confirm the contents of the extension added to the file name of the data. If the data format can be grasped, the CAD data format can be converted into a common format by a known conversion method.

The comparison unit 13 sequentially compares the elements of the converted data stored in separate arrays together with the parameters in the storage unit 16. And as a result of this comparison, when all the elements correspond one-to-one, it is determined that the original data and the comparison target data are the same.
By using the server device having such a functional configuration, it is possible to confirm the identity regardless of the file format of the original CAD data by converting the data into a common format and comparing it with the original data.

  In addition, the CAD data input from the design or construction orderer who can confirm the identity with the original is used as the original data, stored with the time stamp, and compared with this data to be compared with the original data. Can be easily confirmed. Then, by printing out the drawing data together with the identity certificate that is the comparison result, it is possible to ensure the evidence ability in a dispute or the like.

  FIG. 3 is a block diagram showing a configuration example when the CAD data identity guarantee server device 1 is realized by a PC or the like. In the figure, a database 101 that functions as an original data storage unit, a communication unit 102 that functions as a data acquisition unit, a display unit 103 and a printing unit 104 that function as an output unit, and a memory 105 that functions as a storage unit are compared. And a control unit 106 that functions as a data format conversion unit, and these units are connected to each other by a bus line.

The database 101 can be realized using a known hard disk device or the like. In addition, for example, other readable / writable storage media such as a magneto-optical disk, a magnetic disk, and a semiconductor memory can be used.
The communication unit 102 is a device for connecting the server device to a network such as the Internet, and includes a modem, a terminal adapter, and other connection devices. For this reason, CAD data stored in another computer can be received via the communication unit 102 and the identity thereof can be verified.

The display unit 103 is a device for presenting information configured on, for example, a CRT (Cathode Ray Tube) display, a liquid crystal display, or a plasma display on a screen.
The printing unit 104 includes various printer devices such as an ink jet printer, a laser printer, a thermal transfer printer, and a dot printer.

  The memory 105 can store programs and data. For example, an OS (Operating System) which is a basic program for operating the server device, a communication program for controlling the communication unit, a conversion program for converting input CAD data into common format data, and the like Various programs are stored. The memory 105 stores a group of tools for manipulating sfc data and p21 data as a library (referred to as a common library). The server device uses the common library to store sfc data and p21 data. Read and do other processing. The memory stores CAD data such as sfc format files and p21 format files for verifying identity.

The control unit 106 opens the sfc format file and the p21 format file, reads the sfc data and the p21 data, stores the features in the array, performs matching processing of the elements of the array, and the server. Control the entire device.
The control unit 106 performs information processing and control of the entire apparatus according to a predetermined program. The control unit 106 has a storage unit called a register, and various functions of the control unit 106 are exhibited by reading a program from the memory 105 or the like into the register and operating according to the program.

  In the present embodiment, the memory 105 stores the sfc data, the sfc data input using the p21 file, the p21 data, the arrays a and b, the conforming array, An area for verifying the identity between the sfc data and the p21 data can be secured by storing a temporary confirmed array and a confirmed array (see FIG. 10 described later).

  The CAD data identity guarantee server device 1 is also provided with an input unit 107 such as a keyboard and a mouse for inputting various data such as characters and numbers. The keyboard includes keys for inputting kana and English characters, numeric keys for inputting numbers, various function keys, cursor keys, and other keys. A mouse is a pointing device. By using a GUI (Graphical User Interface) or the like to click a button or icon displayed on the display screen with a mouse, predetermined information can be input.

(System operation example)
With reference to FIG.4 and FIG.5, the actual operation example of the system comprised using this server apparatus is demonstrated. Both figures show how data is exchanged with the CAD data identity guarantee server device 1 by the orderer side PC 2 and the order side PC 3.
FIG. 4 shows the state of data exchange at the time of contracting and during design and construction. First, in the orderer side PC2, the order data created based on the contract is registered, and the order data is transmitted to the server device 1 (step SS1). The order data is, for example, “XX0.sfc”.

The transmitted order data is received by the server device 1 and is time stamped and registered as an original in the original data storage unit 11 (see FIG. 2) (step SS2). Thereafter, the ordering data is transmitted to the contractor side PC3, and the drawing is referred to by the contractor side PC3 (step SS3).
The contractor-side PC 3 creates a drawing necessary for the construction based on the ordering data (step SS4). Here, a new drawing is created by CAD software. For example, a drawing with the necessary columns added is created by a proposal from the construction site. Here, the data of the created drawing is, for example, “XX1.aaa”. The created drawing data is transmitted from the contractor side PC 3 for registration in the server device 1 (step SS5).

The data “XX1.aaa” transmitted from the contractor side PC 3 is received by the server device 1 and converted into a common format (step SS6), and then a time stamp is added to the original data storage unit as an original. 11 (see FIG. 2) (step SS7). The data registered after conversion is, for example, “◯◯ 1.sfc”.
Thereafter, the registered data “◯◯ 1.sfc” is transmitted from the server apparatus 1 to the orderer side PC2, and is received and viewed by the orderer side PC2 (step SS8). Thereafter, the orderer PC2 corrects the order data (step SS9). This correction is performed based on the data “◯◯ 1.sfc” received from the server device 1. The corrected data is, for example, “XX2.bbb”.

When such correction work is performed, after the data is registered in the orderer side PC 2, the data “○ 2.bbb” is registered in the server apparatus 1 as a change of the contract contents. Is transmitted from the orderer side PC 2 (step SS10).
The data “XX2.bbb” transmitted from the orderer-side PC 2 is received by the server device 1 and converted into a common format (step SS11), and a time stamp is added to the original data storage unit as an original. 11 (see FIG. 2) (step SS12). The data registered after the conversion is, for example, “XX2.sfc”.

Thereafter, the registered data “XX2.sfc” is transmitted to the contractor-side PC 3 and the contractor-side PC 3 refers to the drawing (step SS13). On the side of the contractor, the construction is performed based on the changed contract based on the data.
Thereafter, when a drawing is created on the side of the contractor, the processes from the above steps SS4 to SS13 are repeated.

FIG. 5 shows how data is exchanged at the time of delivery inspection and when a problem such as a contract dispute occurs.
When the construction is completed and the real estate or movable property is completed, a completed drawing is created by CAD software on the contractor side PC (step SS21). Here, the data of the created drawing is, for example, “XX3.aaa”. The created drawing data is transmitted from the contractor side PC 3 for registration in the server device 1 (step SS22).

  The data “XXX3.aaa” transmitted from the contractor-side PC 3 is received by the server device 1 and converted into a common format (step SS23), and then a time stamp is added to the original data storage unit as an original. 11 (see FIG. 2) (step SS24). The data registered after conversion is, for example, “◯◯ 3.sfc”.

  After that, the registered data “XX3.sfc” is subjected to a difference analysis and verification for guaranteeing the identity (step SS25). Here, the comparison unit 13 (see FIG. 2) performs a comparison process on the data “XX0.sfc”, “XX2.sfc”, and “XX3.sfc”. As a result of this comparison processing, when it is confirmed that there is an identity, that is, no difference from the original, the registered data “XX3.sfc” is transmitted to the orderer side PC 2 together with the warranty card. The orderer side PC 2 can browse the difference data and perform the inspection by receiving the data “XX3.sfc” (step SS26). In this case, since the warranty card by the server device 1 which is a third party organization is attached together with the data, the inspection work becomes easy. For this reason, it is possible to shorten the drawing confirmation work time at the time of delivery inspection.

  If a problem such as a contract dispute occurs, the server device 1 performs processing for analyzing and guaranteeing the registered content of the registered data (step SS31). Here, the comparison unit 13 (see FIG. 2) performs a comparison process on the data “XX0.sfc”, “XX2.sfc”, and “XX3.sfc”. The result of this comparison processing is transmitted to the orderer side PC2 and the orderer side PC together with the warranty card (steps SS32 and SS33). By receiving this comparison result and browsing the content data, the responsibility relationship can be grasped. In this case, since a guarantee by the server device 1 which is a third party is attached together with the data, the evidence ability can be secured.

  In the operation example described above with reference to FIGS. 4 and 5, the data is registered after being converted into data in the common format in the server device 1. However, the data is registered without being converted. The data may be converted into a common format at the stage of comparing the data. In the operation example described above, the conversion to the common format data is performed in the server apparatus 1 that has received the data. However, the data is converted before transmission to the server apparatus 1 and the converted data is converted to the server apparatus 1. You may send to.

(Comparative processing example)
Here, an example of comparison processing by the comparison unit 13 described above will be described in more detail. In this example, whether the CAD data output in the p21 format (hereinafter referred to as p21 data) and the data output in the sfc format (hereinafter referred to as sfc data) represent the same design drawing is verified by the following method.
The CAD data is configured using drawing element data representing drawing elements such as virtual paper, layers, point markers, line segments, circles, symbols, and dimension lines. In these drawing element data, parameters that define how the drawing element is expressed in the design drawing (for example, in the case of a line segment, coordinate values of start and end points, line thickness and color, and the like are arranged. Layer). Further, the attribute information element related to the data may be included in the CAD data. The attribute information element is, for example, earthwork amount information, reinforcing bar quantity information, material information, model number information, and the like. The attribute information element added to the CAD data is created by, for example, a well-known XML (eXtensible Markup Language) file format. Also for this attribute information element, a comparison process between elements is performed as described above, and the result of this comparison process is transmitted as described above. By receiving this comparison result and browsing the content data, the responsibility relationship can be grasped.

  Therefore, the drawing element data of the sfc data and the drawing element data of the p21 data are stored together with the parameters in the array a and the array b, respectively, and the parameters are compared so that the elements of the array a correspond to the elements of the array b (matching). To do. When the elements of the array a and the elements of the array b have a one-to-one correspondence, it is determined that the sfc data and the p21 data are the same, and when they do not correspond to the one-to-one, it is determined that they are not the same.

The association between the array a and the array b is performed for each type of drawing element such as virtual paper, layer, line segment, circle, and the like. Thereby, for example, useless association such as associating line segment drawing elements with circle drawing elements can be avoided.
Further, in association, first, the elements of the array a are sorted, and the elements of the array b are associated with the elements of the array a. When the elements of the array a correspond to the elements of the array a, the elements of the array a and the elements of the array b have a one-to-one relationship while updating the combination of the elements of the array a and the elements of the array b. A combination of the elements of array a and array b that correspond is searched.

(Configuration of CAD data)
Here, the configuration of CAD data will be described. The configuration of the CAD data is the same regardless of the CAD data file format.
In the present embodiment, the CAD data file format is described using the p21 format and the sfc format. Note that this does not limit the CAD data file format to the p21 format and the sfc format, and can be applied to other file formats.

FIG. 6 is a conceptual diagram for explaining a configuration of a design drawing drawn by CAD.
In CAD, a design drawing is drawn by arranging point markers, line segments, circles, dimension lines, and the like on a virtual sheet. A coordinate system 19 is set for the virtual paper 10, and by drawing a graphic on the paper 10, the graphic can be arranged in the coordinate space.
The virtual paper 10 is composed of a plurality of layers called layers (layers 11a, 11b, 11c...), And the user can select a layer and draw a design drawing on the layer.

  Layers can be selectively manipulated. For this reason, for example, a geometric shape is drawn on layer 1 and a dimension line is drawn on layer 2, and layers 1 and 2 are displayed simultaneously to display a drawing on which the dimension line is drawn. 2 is not displayed, and only the geometric shape drawn on the layer 1 can be displayed, so that drafting work and use efficiency of the drawing can be improved.

The drawing elements drawn on the paper indicate, for example, those having a geometric shape such as line segments 12a, 12b, 12c, circles 15a, 15b, and positions in the coordinate space such as the point marker 17. There are various types, such as dimension lines, angle dimension lines, text data, symbols (for example, symbol notation representing the inclination of the roof).
In this way, CAD data is structured such as drawing elements representing drawing structures such as virtual paper and layers, drawing elements representing geometric shapes and notations such as point markers and line segments, and symbols and symbols. (For example, a balloon is composed of a circle, an arrow, and text data in the circle structured).
The CAD data of the present embodiment manages these drawing elements using the concept of features described below.

FIG. 7 is a diagram for explaining the configuration of features.
A feature is a management unit of drawing elements. The feature has a feature name and a parameter for specifying the representation of the drawing element on the design drawing.
For example, a drawing element that represents a line is called a line feature, and it represents the line in the design drawing, such as the layer on which the line is drawn, the coordinates of the start and end of the line, line type, and line width. Comes with a parameter to identify
The types of parameters are set for each feature, for example, the coordinate value of the start point and the end point for a line segment feature,..., The coordinate value of a center point for a circle feature,.

Hereinafter, these features will be described in more detail.
Features are roughly classified into three types: drawing structure feature group, geometric notation element feature group, and structured element feature group.
The drawing structure feature group is made up of features that define basic information for constructing CAD data. The drawing structure feature group includes a paper feature, a layer feature, a predefined line type feature, a user-defined line type feature, a predefined color feature, a user-defined color feature, a line width feature, a character font feature, and the like.

The paper feature is a feature that designates a virtual paper on which a design drawing is drawn, and defines a drawing name, a paper size, and the like. By referring to the paper feature, a virtual paper used in the CAD data can be specified.
The layer feature is a table element that is referred to from a geometric notation element and a structuring element, which will be described later, and a layer code that identifies each layer is associated with a name of the layer, a display / display state, and the like. The layer feature has a layer name as a parameter, a flag indicating the display / non-display state of the layer, and the like as parameters. By referring to the layer feature, the layer name and state of each layer can be specified.

  The predefined line type feature is a table element that is referenced from a geometric notation element or a structured element. For example, the predefined line type code 1 is a solid line, the predefined line type code 2 is a dotted line, etc. Line type can be specified by code. Each of these line types is a predefined line. The predefined line type feature has a line type name as a parameter, and the line type code and the line type name are associated with each other.

Similarly, the following features are table elements that are referenced from geometric notation elements and structured elements. User-defined line type features associate user-defined line type codes with user-defined line types. The line type can be specified by specifying the definition line type code.
The predefined color feature associates a preset color with a predefined color code, and the color can be specified by specifying the predefined color code. Colors are represented by parameters.

The user-defined color feature associates a user-defined color code with a user-defined color, and when a user-defined color code is specified, a user-defined color can be specified. Colors are represented by parameters.
The line width feature associates the line width code with the line width, and the line width can be specified by specifying the line width code. The line width is represented by a parameter.

The character font feature associates a character font code with a character font, and the character font can be specified by specifying the character font code. Character fonts are represented by parameters.
The geometric notation element feature group is composed of features representing basic geometric figures and the like. Examples of features constituting the geometric notation element feature group include a point marker feature, a line segment feature, a polygonal line feature, a circle feature, an arc feature, an ellipse feature, an ellipse arc feature, a character feature, and a spline feature.

Hereinafter, the features constituting the geometric notation element feature group will be described in detail using the point marker feature and the line segment feature.
FIG. 8A shows the data structure of the point marker feature. Note that the point marker is a point on the drawing for the sake of convenience in order to display the coordinate position on the display. It is displayed on the display but not printed. For example, when the user draws a circle and wants to display the position of the center point of the circle for the sake of drawing, a point marker is arranged at the center position of the circle.
As shown in the figure, each marker point placed on a virtual sheet is specified by parameters such as layer code, color code, placement point X coordinate, placement point Y coordinate, marker code, rotation angle, scale, and the like. The

The layer code is the layer code of the layer in which this point marker is arranged, and the layer in which this point marker is arranged can be specified by referring to the layer code in the table element of the layer feature.
The color code is a code for specifying the color of the point marker, and the color of the point marker can be specified by referring to the code with a predefined color feature or a user-defined color feature.

The arrangement point X coordinate and the arrangement point Y coordinate are the X coordinate value and the Y coordinate value of the position where the point marker is arranged.
The marker code is a code for specifying the shape of the marker. For example, a table is prepared in advance such that code 1 is an asterisk type, code 2 is a circular shape, and code 3 is a dot.
The rotation angle and scale represent the rotation angle and scale at which point markers are arranged, respectively.

As described above, parameters are set for each point marker feature (data 1, data 2,...) Included in the CAD data, and attributes (layer, position, shape, color) of each point marker feature are set by these parameters. Etc.) on the design drawing.
Each of data 1, data 2,... Corresponds to a point marker displayed on the drawing, and each constitutes drawing element data.

FIG. 8B is a diagram showing a data structure of line segment features.
The line segment feature corresponds to a line segment arranged on the design drawing. Parameters such as layer code, color code, line type code, line width code, start point X coordinate, start point Y coordinate, end point X coordinate, end point Y coordinate are set for the line segment feature placed on the virtual paper. These parameters specify the attributes (representations on the design drawing such as layer, position, shape, and color) of each line feature.

The layer code is a code of a layer in which the line segment feature is arranged and is defined by the layer feature.
The color code is a code for specifying the color of the line segment feature, and is defined by a predefined color feature or a user-defined color feature.
The line type code is a code for specifying the line type (solid line, dotted line,...) Of the line segment feature, and is defined by a predefined line type feature or a user-defined line type feature.

The line width code is a code for specifying the line width of the line segment feature, and is defined by the line width defining feature.
The start point X coordinate and the start point Y coordinate are the XY coordinate values of the start point of the line segment, and the end point X coordinate and the end point Y coordinate are the XY coordinate values of the end point of the line segment.
In this way, parameters are set for each line feature (data 1, data 2,...) Included in the CAD data, and attributes (layer, position, shape, color, etc.) of each line feature are set by these parameters. (Expression on the drawing) is specified. Similarly, attributes (representations on the design drawing such as layer, position, shape, color, etc.) of other features constituting the geometric notation feature group are specified by parameters.

Returning to FIG. 7, each feature constituting the structuring element feature group is a feature constituted by a plurality of geometric notation element features, and is defined so that a plurality of data can be handled as specific unit data. For example, the dimension line is configured by combining line segment features and character features.
The features that make up the structuring element feature group include composite figure definition features, composite figure placement features, predefined symbol features, linear dimension features, angular dimension features, radial dimension features, diameter dimension features, leader line features, balloon features, There are hatched (predefined) features, hatched (filled) features, hatched (user-defined) features, hatched (patterned) features, compound curve defined features, and the like.

The composite graphic definition feature is an element for defining a composite graphic. A composite figure defines a figure name composed of a plurality of geometric notation elements such as line segments and arcs as one figure. It has a composite figure name and a composite figure type flag as parameters. This feature is used for partial views.
The composite graphic arrangement feature is an element for specifying a position or the like where the composite graphic is arranged. The composite graphic arrangement feature has a layer code, a composite graphic name, an XY coordinate value, a rotation angle, an X direction scale, a Y direction scale, and the like as parameters.

Hereinafter, similarly, the predefined symbol feature is an element representing a predefined symbol, and attributes such as the type of symbol, the arrangement position, and the color are defined by parameters.
A linear dimension feature, an angular dimension feature, a radial dimension feature, a diameter dimension feature, and a leader line feature are features that represent each dimension line and leader line in CAD data. Depending on the parameters set for each feature, Display dimensions are specified. The balloon feature is a feature representing a balloon in CAD data, and a layer, an arrangement position, and the like are defined by parameters.

A hatching (predefined) feature, a hatching (filling) feature, a hatching (user-defined) feature, and a hatching (pattern) feature are hatching features, and a layer, a hatching area, and hatching are defined.
The compound curve defining feature represents a curve composed of a plurality of line segments or arcs as one element. This is also uniquely defined by the parameters.

A description will be given with reference to FIG. 2 again. Hereinafter, a case where the identity between the sfc data and the p21 data is determined will be described. That is, this server apparatus matches the feature included in the p21 data with the feature included in the sfc data by comparing the parameters, and checks whether the features of both data correspond one-to-one.
As described above, since the design drawing is defined by each feature constituting the CAD data, when the feature constituting the p21 data and the feature constituting the sfc data have a one-to-one correspondence, the same design drawing is obtained from both data. Since it can be reproduced, it can be said that both data are the same.

When the data format conversion unit 15 is activated, a list of CAD data stored in the original data storage unit 11 or a file acquired by the data acquisition unit 12 is displayed, and a file that the user wants to verify the identity of Can be selected.
Further, the data format conversion unit 15 grasps the file format of the selected file based on the extension of the selected CAD data file. Then, the CAD data is converted into the sfc format or the p21 format. Then, the converted data is stored in the storage unit 16.

  The storage unit 16 stores (assigns) the features included in the sfc data in the array (array a) and stores the features included in the p21 data in the array (array b). When the feature is composed of a plurality of elements (for example, since the line segment feature is generally composed of a plurality of data such as data 1, data 2,..., There are a plurality of elements of the array a). The storage unit 16 stores each data in the elements of the arrays a and b.

The comparison unit 13 receives the array a and the array b from the storage unit 16, compares these parameters, and associates (compares) the elements of the arrays a and b.
The association is performed for each type of feature. That is, first, the arrays a and b are compared with respect to the paper feature, and if they match, the arrays a and b are compared with respect to the next feature. This is performed for all the arrays a and b.
If there is an element that does not match as a result of the comparison, the comparison process is terminated at that time, and it is determined that the sfc data and the p21 data are not the same.

When all the elements of the arrays a and b are associated one-to-one, it is determined that the sfc data and the p21 data are the same.
The reference for determining the coincidence of the elements in the arrays a and b is set for each feature. For example, although there are seven types of parameters in the point marker feature, if all these parameters match, it is determined that the elements of the arrays a and b match.
Further, although there are eight types of parameters in the line segment feature, when all these parameters match, it is determined that the elements of the arrays a and b match.

Note that the parameters are matched by making the coordinates of the points within the allowable coordinate error range the same. Therefore, even if the coordinate value of the point marker feature stored in the array a and the coordinate value of the point marker feature stored in the array b differ numerically, the difference is within the allowable coordinate error range. Are determined as the same point marker feature.
For this reason, an element of the array a may correspond to an element of the array a. An algorithm for processing this case will be described later.
The result output unit 30 uses the comparison result of the comparison unit 13 to output a determination result as to whether the sfc data and the p21 data are the same.

(Procedure for storing features in an array)
FIG. 9 is a diagram for explaining a procedure for storing features in an array.
The sfc data 35 is CAD data that constitutes a design drawing of a house, for example, and is composed of features as shown in Table 37. The storage unit 16 stores each feature constituting the sfc data 35 in the array a.
Each element of the array a stores information for identifying a feature and parameters set for the feature. Since matching is performed using some or all of the parameters, only the parameters necessary for matching may be stored in the arrays a and b.

In addition, what is composed of one element such as a paper feature is stored in one array element, and what is composed of a plurality of data such as a point marker feature and a line segment feature is stored for each data. Information for specifying features and data, and parameters set in the data are stored.
Similarly, the p21 data 40 is composed of each feature as shown in Table 42. The storage unit 16 substitutes each feature constituting the p21 data 40 into the array b in the same manner as the sfc data 35.
Also, since the configuration of parameters differs for each type of feature, the element types of the arrays a and b may be defined for each type of feature.
In this case, structures having a class of feature as a class are defined as arrays a and b.

Next, processing when a plurality of elements of the array b match one element of the array a will be described with reference to FIG.
First, the storage unit 16 sorts the elements of the array a. For example, in the case of a point marker feature, the sorting method is determined for each feature such as sorting in ascending order of the X coordinate. Further, sorting can be performed by using, for example, the coordinates of the center in the case of a circle feature and the coordinates of the starting point in the case of a line segment feature.

After sorting, the comparison unit 13 identifies the element of the array b corresponding to each element of the array a by comparing the parameter of the element of the array a with the parameter of the element of the array b. The correspondence relationship generated in this way is represented as, for example, the matching array 50 in FIG. Here, duplication of elements of the array b is allowed, and a combination corresponding to the elements of the arrays a and b is called a matching array.
In FIG. 10, in order to distinguish the elements of the array a, each element is represented as a (0), a (1),..., And the number is written in the cell. The same applies to the elements of the array b.
In the matching sequence 50, b (0) matches a (0), and b (1) and b (2) correspond to a (1). The same applies hereinafter.

Next, a procedure for making one-to-one correspondence between the elements of the arrays a and b from the matching array 50 thus generated will be described.
First, since only b (0) matches a (0), the comparison unit 13 temporarily determines that a (0) corresponds to b (0), and generates a temporary determined array 55. .
In the provisional definite array 55, b (0) corresponds to a (0), but the element of the corresponding array b is undecided with respect to the elements of the other array a.
Here, a combination in which the elements of the arrays a and b are combined on a one-to-one basis will be referred to as a provisionally determined array. The provisional fixed array may be released from the combination by a later update process.

Next, the comparison unit 13 provisionally determines an element of the array b corresponding to a (1). In the matching arrangement 50, a (1) corresponds to b (1) and b (2), and any one of them is provisionally determined. Here, b (1) is provisionally determined. In this way, the comparison unit 13 updates the temporary confirmation array 55 to the temporary confirmation array 56.
Next, the comparison unit 13 determines the element of the array b corresponding to a (2). In the matching array 50, since the element of the array b that matches a (2) is only b (1), the comparison unit 13 temporarily determines b (1) with respect to a (2). The confirmed array 56 is updated to a temporary confirmed array 57.

However, since b (1) has already been provisionally fixed in correspondence with a (1), if b (1) is associated with a (2), the elements of array a and array b Cannot be associated one-to-one. Therefore, the comparison unit 13 cancels the correspondence relationship between a (1) and a (2), and returns to the step of temporarily determining the correspondence relationship between a (1) and the previous step.
Since the matching sequence 50 corresponding to a (1) has b (2) in addition to b (1), the comparison unit 13 associates b (2) with a (1). . In this way, the comparison unit 13 updates the provisional confirmation array 57 to the provisional confirmation array 58.

Next, the comparison unit 13 associates b (1) as an element corresponding to a (2), and updates the provisional confirmation array 58 to the provisional confirmation array 59.
Next, the comparison unit 13 associates b (2) with a (3), but b (2) is already associated with a (1), so the provisional determination of b (2) is canceled, Temporarily confirm b (4). Then, a provisional fixed array 60 is obtained.

  Hereinafter, the comparison unit 13 sequentially associates the elements of the arrays a and b as described above, and when a contradiction occurs, the comparison unit 13 returns to the previous stage and searches for a new correspondence. If this process is repeated recursively, when the elements of the arrays a and b correspond one-to-one, the correspondence can be determined one-to-one up to the last element a (n), and the fixed array 65 Is obtained. Here, a combination of the elements of the arrays a and b in which the elements of the arrays a and b are associated one-to-one is referred to as a definite array.

If there is no one-to-one correspondence, the process returns to the stage of determining the element of the array b corresponding to a (0), and the matching array 50 includes the elements of the array b corresponding to a (0). Thus, the element of the array b corresponding to a (0) cannot be found without contradiction. In this case, the processing is returned to a (−1) in the stage before a (0).
By the above procedure, it is possible to verify whether CAD data is coincident with respect to the feature by searching for a combination that makes the elements of the arrays a and b have a one-to-one correspondence.

Next, the detailed data processing procedure by this apparatus is demonstrated using a flowchart.
FIG. 11 is a flowchart showing a matching processing procedure performed by the present apparatus.
First, the data format conversion unit 15 reads an sfc format file (step S5). Next, sfc data is read from this sfc format file, and the features are stored in the array a (step S10).

Next, the p21 format file is read by the data format conversion unit 15 (step S15), and the features are stored in the array b (step S20). Then, the storage unit 16 sorts the array a for each feature.
Next, the counter k for the comparison unit 13 to count the features is initialized to 0 (step S25).

For the feature, for example, k = 0 for a paper feature, k = 1 for a layer feature,...
Next, the comparison unit 13 performs matching processing on the elements of the arrays a and b with respect to the k-th feature (step S30). The procedure of this process will be shown later.
If the arrays a and b corresponding to the k-th feature do not exist (for example, in the CAD data created without using the elliptic feature, the arrays a and b corresponding to the elliptic feature do not exist) Processes as a match of elements a and b.

If the elements of the arrays a and b do not match one-to-one (step S35; N), it is determined that the sfc data and the p21 data are not the same (step S55), and the apparatus ends the process.
When the elements of the arrays a and b match one-to-one (step S35; Y), 1 is incremented to k (step S40). Next, the comparison unit 13 determines whether k is less than M (step S45). Here, M is the number of all features.

  When k is not less than M (that is, when k is greater than or equal to M) (step S45; N), matching of the arrays a and b is successful for all the features, and the comparison unit 13 determines that the sfc data and It is determined that the p21 data is the same (step S50), and the process ends. When k is less than M (step S45; Y), since there is a feature that has not been matched yet, the comparison unit 13 returns to the process of step S30.

FIG. 12 is a flowchart showing the matching process procedure in step S30 (FIG. 11).
This process is an operation for searching for a definite sequence from the matching sequence (FIG. 10).
First, the comparison unit 13 confirms the number of elements in the arrays a and b (step S105). If the number of elements in the array is not the same (step S110; N), the elements in the arrays a and b do not correspond one-to-one, so the comparison unit 13 determines that they are incompatible (not matched) (step S145), and step S30. Return to FIG.

When the number of elements of the array is the same (step S110; Y), the comparison unit 13 associates the array b with each element of the array a by comparing the parameters (step S115). As a result, a matching sequence as shown in FIG. 10 is obtained.
Next, the comparison unit 13 checks whether all elements of the array a are associated with at least one element of the array b (step S120). If there is an element of the array a that is not associated with any element of the array b (step S120; N), the elements of the arrays a and b cannot be associated one-to-one. (Step S145), and the process returns to step S30 (FIG. 11).

When at least one element of the array b is associated with all the elements of the array a (step S120; Y), the comparison unit 13 also applies at least one to each element of the array b. It is confirmed whether or not the elements of the array a are associated (step S125).
If there is an element of the array b that is not associated with any element of the array a (step S125; N), the comparison unit 13 determines that it is incompatible (step S145), and returns to step S30.

  When at least one element of array a is associated with all elements of array b (step S125; Y), array element matching processing is performed in step S130 (step S130). This process will be described later with reference to the flowchart of FIG. When the elements of the arrays a and b are associated with each other in this process, a deterministic array as shown in FIG. 10 is obtained.

As a result of the matching process, when the elements of the arrays a and b are associated one-to-one (step S135; Y), it is determined that the elements match (that is, matches) (step S140). Return to FIG.
On the other hand, when the elements of the arrays a and b are not associated one-to-one (step S135; N), it is determined as non-conforming (step S145), and the process returns to step S30.

FIG. 13 is a flowchart showing the procedure of the matching process in step S130 (FIG. 12). The work performed in this process is a work for updating the temporary fixed array in FIG.
First, the comparison unit 13 initializes the counter i to 0.
Next, the comparison unit 13 relates to a (i) among the elements of the array a, and among the elements of the array b associated with a (i), those that are not confirmed (that is, those that are not provisionally confirmed). It is confirmed whether there is any (step S210).
If there is an undetermined element in the array b (step S210; Y), an element of the array b is selected from the elements in the array b and temporarily confirmed, and the element of the array b is associated with a (i) ( Step S215).

Next, the comparison unit 13 increments i by adding 1 (step S225).
Next, the comparison unit 13 determines whether i is greater than N (step S230). Here, N is the number of elements of the array a and the array b. If i is not greater than N (i is equal to or less than N) (step S230; N), there is an element of array a that is not yet associated with the element of array b. Return to S210. When i is larger than N (step S230; Y), since all the elements of the array a are associated with the elements of the array b, the comparison unit 13 determines that the matching is successful (step S235), and performs the processing. The process returns to step S130 (FIG. 12).

In step S210, when there is no unconfirmed element in the array b associated with a (i) (step S210; N), the comparison unit 13 decrements by subtracting 1 from i. (Step S245).
Then, the comparison unit 13 confirms whether or not i is negative (more specifically, whether or not the result of subtracting 1 from i is −1) (step S250). When i is negative (step S250; Y), the comparison unit 13 determines that matching is unsuccessful (step S260), and returns the process to step S130 (FIG. 12). When i is not negative (step S250; N), the comparison unit 13 checks whether there is an element of the array b that matches a (i) that has never been tentatively confirmed (step S250). S225). When there is something that has never been tentatively confirmed (step S255; Y), the comparison unit 13 returns the process to step S215, selects an element of the array b from among them, and tentatively confirms it.

If there is no element of the array b that has never been provisionally confirmed (step S255; N), the comparison unit 13 cancels the provisionally confirmed state of the element of the array b that has been provisionally confirmed in a (i) (step S255). (S240), the process returns to step S245.
The procedure for determining the identity between the sfc data and the p21 data has been described above, but this is merely an example, and various modifications can be made.

For example, in the present embodiment, the array a is sorted and the elements of the array b are associated with it, but conversely, the array b is sorted and the elements of the array a are associated with it. You can also.
In this embodiment, features are stored in an array and matching is performed on an element basis of the array. However, in order to perform matching, it is only necessary to compare the parameters of the features, and it is not always necessary to use the array.

(Application examples)
Although one embodiment of the present invention has been described above, the present invention is not limited to the described embodiment, and various modifications can be made within the scope described in each claim.
For example, in this embodiment, the p21 format and the sfc format are used as the CAD data file format, but this does not limit the file format. For example, the file format used by the CAD software of company A and B Comparison can be made between CAD data related to different file formats such as the file format adopted by CAD software of the company. That is, regardless of the file format, if the parameters can be compared in units of drawing elements, the identity can be verified by this apparatus.

Also, for example, CAD data of the same file format can be compared, such as comparing two p21 data or two sfc data. In this case, for example, the drawing element data of the first p21 data is stored in the array a, the drawing element data of the second p21 data is stored in the array b, and the elements of the arrays a and b are associated with each other.
Furthermore, the above description has been made on the two-dimensional drawing data, but it is obvious that the same can be applied to the three-dimensional drawing data. That is, by converting 3D drawing data into a common data format and sequentially comparing the drawing elements, the content identity between the CAD drawing data can be confirmed.

(Management of revision history)
Incidentally, a correction history of CAD data may be stored, and the correction history storage contents may be printed out. For example, when the order data is corrected, the difference between the correction before and after the correction is used as a correction history and stored in, for example, a database. That is, as illustrated in FIG. 14, the correction source data 101 a and the correction history data 101 b that is the correction contents are stored in the database 101. Then, every time correction is performed, correction history data 101b is sequentially accumulated. In this case, when the contractor modifies the correction source data, data for delivery to the orderer is created. When the delivery data is transmitted from the server device to the orderer side PC, the correction history data is also transmitted in addition to the above-described warranty.

  Even when managing the correction history data, the latest CAD data in which the correction source data is corrected is compared in the comparison process. If there is no identity as a result of the comparison processing between the CAD data, the relationship of responsibility can be grasped by checking the contents of the correction history data transmitted together with the delivery data. As a result of the comparison process, it is a matter of course that the contents of the correction history data transmitted together with the delivery data can be confirmed even when there is identity.

  This correction history includes, for example, the correction content of the CAD data, its time stamp, and corrector information for specifying the person who performed the correction. If these are included, correction information, time stamps such as date and time, corrector information such as corrector name and ID can be confirmed, and the responsibility relationship can be grasped in more detail. However, not limited to these, it is a matter of course that other information may be included as the correction history, and the responsibility relationship can be grasped in detail based on the information.

(CAD data identity guarantee method)
A CAD data identity guarantee method realized by the above-described CAD data identity guarantee system using the CAD data identity guarantee server device will be described with reference to the flowchart of FIG.
The CAD data identity guarantee method realized by the system described above is designed to ensure the identity of CAD data composed of drawing elements constituting a drawing and parameters defining how the drawing element is represented in the drawing. This is a CAD data identity guarantee method to be guaranteed. An original data storage step (step S301) in which CAD data input from an orderer is stored as original data together with a time stamp, and comparison data to be compared with the original data is acquired. A data acquisition step (step S302), a comparison step (step S303) for comparing the data acquired in the data acquisition step with the data stored in the original data storage step, and a comparison result of the comparison step is output. Output step (step S30 ) And contain.

  By adopting such a method, the CAD data input from the orderer of design or construction is used as the original data, stored together with the time stamp, and compared with the comparison target data, the content of the original data Identity can be easily assured. Further, by outputting the drawing data together with the identity certificate which is the comparison result, it is possible to guarantee the evidence ability in a dispute or the like.

Further, the CAD data identity guarantee method as shown in FIG. 16 is also realized by the CAD data identity guarantee system. That is, a CAD data identity guarantee method for guaranteeing the identity of CAD data composed of drawing elements constituting a drawing and parameters defining how the drawing element is expressed in the drawing. The data format conversion step (step S401) for converting the converted CAD data into data in a common format that can be compared with the original data, and the converted data converted in the data format conversion step are arranged in separate arrays together with the parameters. Storing step (step S402), a comparison step (step S403) for sequentially comparing the elements after conversion by the data format conversion step, and as a result of the comparison by the comparison step, all the elements are Compared to the above original data when the one-to-one correspondence Method comprising a determining step and elephants data and are the same (step S404) is implemented.
According to such a method, the content identity of the data can be confirmed regardless of the file format of the original CAD data by converting the data into the common format and comparing it with the original data.

(Summary)
By using the CAD data identity assurance server apparatus and CAD data identity assurance method of the present invention, the following effects can be obtained. That is, by converting the data into the common format data and comparing it with the original data, the identity can be confirmed regardless of the file format of the original CAD data. In addition, the CAD data input from the design or construction orderer who can confirm the identity with the original is used as the original data, stored with the time stamp, and compared with this data to be compared with the original data. Can be easily confirmed, and by outputting the drawing data together with the identity certificate which is the comparison result, it is possible to guarantee the evidence ability in a dispute or the like.

  When confirming the identity of the content of the data, the elements in the data file (for example, “lines”) are drawn in any order as long as the contents displayed on the screen are the same. It can be concluded that there is sex. Furthermore, even if there is a correction point, the difference can be managed. For this reason, when there is a defect in the completed real estate or movable property based on the drawings, it is possible to clarify whether the orderer or the contractor has responsibility, that is, where the responsibility is.

  The present invention can be used when confirming the identity of CAD data.

It is a figure which shows the outline | summary of the CAD data identity guarantee system comprised using the CAD data identity guarantee server apparatus by this invention. It is a block diagram which shows the function structural example of the CAD data identity guarantee server apparatus by one Embodiment of this invention. It is a block diagram which shows the structural example in the case of implement | achieving the CAD data identity guarantee server apparatus 1 by PC etc. FIG. It is a figure which shows the actual operation example of data transfer at the time of contract, and under design and construction. It is a figure which shows the actual operation example of data transmission / reception at the time of delivery inspection and the time of problems, such as the occurrence of contract disputes. It is a conceptual diagram for demonstrating the structure of the design drawing drawn with CAD software. It is a figure for demonstrating the structure of a feature. It is a figure for demonstrating the data structure of a geometric description element feature. It is a figure for demonstrating the procedure which substitutes a feature to an arrangement | sequence. It is a figure for demonstrating the process in case the some element of the arrangement | sequence b matches one element of the arrangement | sequence a. It is the flowchart which showed the procedure of the matching process. 12 is a flowchart showing a procedure of matching processing in step S30 in FIG. It is a flowchart for demonstrating the procedure of the matching process of step S130 in FIG. It is a block diagram which shows the other structural example in the case of implement | achieving the CAD data identity guarantee server apparatus 1 by PC etc. FIG. 3 is a flowchart illustrating an example of a CAD data identity guarantee method according to an embodiment of the present invention. 6 is a flowchart illustrating another example of a CAD data identity guarantee method according to an embodiment of the present invention.

Explanation of symbols

1 Data identity guarantee server device 2 PC on the orderer side
3 Contractor's PC
DESCRIPTION OF SYMBOLS 11 Original data storage part 12 Data acquisition part 13 Comparison part 14 Output part 15 Data format conversion part 16 Storage part 100 Network 101 Database 102 Communication part 103 Display part 104 Printing part 105 Memory 106 Control part 107 Input part

Claims (9)

  An identity guarantee server device that guarantees the identity of CAD data composed of drawing elements constituting a drawing and parameters that define how the drawing element is expressed in the drawing. Original data storage means for storing input CAD data as original data together with a time stamp, data acquisition means for acquiring comparison target data to be compared with the original data, data acquired by the data acquisition means, and the original data A CAD data identity guarantee server device comprising: a comparison means for comparing data stored in a data storage means; and an output means for outputting a comparison result of the comparison means. The CAD data further includes an attribute information element related to the data,
2. The CAD data identity assurance server device according to claim 1, wherein the comparison means also compares the attribute information elements. And further comprising storage means for storing the CAD data together with the parameters in separate arrays,
The comparison means sequentially compares the elements stored in the array, and when the comparison results in a one-to-one correspondence between all the elements, the original data and the comparison target data The CAD data identity assurance server device according to claim 1 or 2, wherein it is determined that they are the same.   A data format converting means for converting the input CAD data into data in a common format that can be compared with the original data, and comparing the converted data by the data format converting means by the comparing means; The CAD data identity guarantee server device according to any one of claims 1 to 3, wherein the CAD data identity guarantee server device is characterized in that:   The data format conversion means performs SXF conversion on the input CAD data, and sets one of p21 format data and sfc format data obtained by the SXF conversion as common format data. Item 5. The CAD data identity assurance server device according to Item 4.   6. The recording apparatus according to claim 1, further comprising a correction history storage unit that stores a correction history of the CAD data, wherein the output unit also outputs the stored contents of the correction history storage unit. 2. The CAD data identity guarantee server device according to item 1.   7. The CAD data according to claim 6, wherein the correction history includes at least correction contents of the CAD data, a time stamp thereof, and corrector information for specifying a person who has made the correction. Identity guarantee server device.   A CAD data identity guarantee method for guaranteeing the identity of CAD data comprising drawing elements constituting a drawing and parameters defining how the drawing element is expressed in the drawing, comprising: The original data storage step of storing the CAD data input from the original data together with the time stamp, the data acquisition step of acquiring the comparison target data to be compared with the original data, the data acquired by the data acquisition step, A CAD data identity guarantee method, comprising: a comparison step for comparing data stored in an original data storage step; and an output step for outputting a comparison result of the comparison step.   A CAD data identity guarantee method for guaranteeing the identity of CAD data composed of drawing elements constituting a drawing and parameters that define how the drawing element is expressed in the drawing. A data format conversion step for converting the CAD data into data in a common format that can be compared with the original data, and a storage step for storing the converted data converted in the data format conversion step in separate arrays together with the parameters And a comparison step for sequentially comparing the elements after conversion by the data format conversion step, and, as a result of the comparison by the comparison step, when all the elements correspond one-to-one, the original data and A step of determining that the data to be compared is the same as C D data identity assurance methods.

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