JPH087754B2 - Drawing search method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a drawing search system for storing and managing drawing data as a database and searching drawing data according to input search conditions.

[Conventional technology]

FIG. 6 is disclosed in Japanese Patent Laid-Open No. 1-263770 and Sho 62-279467.
FIG. 3 is a block diagram showing the configuration of an image search device as seen in FIG. In FIG. 6, 1 is a drawing data input means for inputting drawing data by a scanner or the like and converting it into a required data structure, 3 is a drawing data storage means for coding and storing the inputted drawing data, and 4 is a keyboard or A search condition input means for inputting a search condition for a drawing with a mouse or the like, 7 is a drawing search executing means for referring to the stored drawing data to obtain drawing data satisfying the search condition, and 8 is a drawing search executing means for a CRT display or the like. 7 is a search result output means for displaying and outputting the drawing data obtained by 7.

The details of the drawing data storage means 3 in the above-mentioned Japanese Patent Laid-Open No. 1-263770 and Sho 62-279467 are as shown in FIG. In FIG. 9, 9 is an image information storage means for storing the image data as it is, 10 is a graphic information extraction means for extracting the graphic information used as a search key from the image data,
11 is a graphic information storage means for storing the extracted graphic information,
Reference numeral 12 is structure information creating means for creating structure information in which the image information stored in the image information storage means 9 is associated with the graphic information stored in the graphic information storage means 11, and 13 is structure information for storing the structure information. It is a storage means.

Japanese Patent Laid-Open Publication Nos. 1-263770 and 62-2794, which are conventional examples.
In 67, each of the graphic information extracting means 10 of FIG. 9 extracts various graphic structures that can serve as search keys based on the image information accumulated in the image information accumulating means 9 and uses them to obtain the purpose. You are searching for drawings.

[Problems to be Solved by the Invention]

The conventional drawing retrieval device is configured as described above, and since the graphic information that is the search information is extracted from the original form of the image information that is the search target, there is a limit to the graphic information that can be used as the search condition. . Here, as an example, let us consider a case where a drawing consisting of symbols and connecting lines is targeted, and an example of a problem when a drawing search is performed using only graphic information extracted from the original shape of the above drawing. Describe.

Graphic information extraction means 10 in this conventional drawing retrieval system
A method of encoding the drawing information data of 1 will be described with reference to FIG. FIG. 4 (a) is a drawing consisting of symbols and connecting lines, B and P show the types of symbols, and d shows the intersections / branching points of the connecting lines. In this drawing, if P is selected as the central symbol for encoding, the corresponding drawing is
It is represented by tree-structured data having the symbol P as a root, as shown in FIGS. At this stage, there are a plurality of methods for expressing the tree structure data, and therefore the tree structure data is uniquely expressed based on the priority order of the symbol arrays and expressed as shown in FIG. 4 (d). This unique tree structure data is stored in the drawing data storage means 3.

Next, the drawing search executing means 7 will be described with reference to FIG. FIG. 7 shows the tree structure data uniquely input by the search condition input unit 4 and the tree structure data of the tree structure data stored in the drawing data storage unit 3 that is matched with the above search conditions. An example is shown. The collation in the tree structure data is performed by the following procedure. A of FIG. 7 which is the root of the tree structure data of the search condition is compared with a of FIG. 7 which is the root of the tree structure data of the drawing data to be collated. A
7 and a match in FIG. 7, the node of the next hierarchy next to the root of the tree structure data of the search condition, that is, B of FIG. 7,
It is checked whether the node corresponding to C exists in the hierarchy immediately below the root of the tree structure data for the drawing data to be collated.
In the example of FIG. 7, the nodes corresponding to B and C exist as nodes b and c in the hierarchy immediately below the root of the tree structure data of the drawing data to be collated, and b and c are B and C, respectively. Since it matches C, the node in the hierarchy immediately below the node B of the tree structure data of the search condition, that is, the node corresponding to D and E in FIG.
It is checked whether or not the tree structure data of the drawing data to be collated corresponds to the node B of the search condition and exists in the layer immediately below the matching node b. In the example of FIG. 7, the nodes corresponding to D and E are b of the tree structure data of the drawing data to be collated.
It exists as a node d, e in the hierarchy immediately below, and d, e correspond to D and E, respectively. As described above, in the example of FIG. 7, the nodes corresponding to the nodes A, B, C, D, and E of the search condition tree structure data are present in the tree structure data of the drawing data to be collated, A, B, C, D in the tree structure data of the search condition
E and the corresponding nodes a, b, c, d, and e in the tree structure data of the drawing data to be collated corresponding to each other match.
Through the above procedure, the <search condition> tree structure data of FIG. 7 is collated with the <stored drawing data> tree structure data, and as a result, <stored by the <search condition> of FIG. Drawing data> is searched. On the contrary, if the node corresponding to each node of the tree structure data of the search condition does not exist in the tree structure data of the drawing data to be collated,
Even if the corresponding nodes exist, if they do not match, the search condition is not matched with the drawing data to be matched, and the drawing data cannot be searched under that search condition. FIG. 8 shows an example in which the above procedure is not performed. Of each node of the tree structure data of the search condition in Fig. 8
For A, B, C, there are corresponding nodes a, b, c in the tree structure of the drawing data to be collated, and A and a, B and b, and C and c respectively match. However, the nodes corresponding to the nodes α and β in the hierarchy immediately below the node B of the search condition correspond to the node B of the search condition in the tree structure data of the drawing data to be collated, and the nodes immediately below the node b that match. Hierarchical node ω
Therefore, one of the search condition nodes α and β remains without a corresponding node. Therefore, in the example of FIG. 8, the tree structure data of <search condition>,
It does not collate with the <stored drawing data> tree structure data, and depending on the <search condition> in FIG. 8, the <stored drawing data> in FIG. 8 is not searched.

As described in the above example, in the drawing search method using the graphic information extracted from the original shape of the image information to be searched, that is, the tree structure, as shown in FIG. From the point of view, it was only possible to set the condition that it was completely included in the tree of accumulated drawing data.
For example, as shown in FIG. 8, a complete inclusion relationship is not established in the tree structure, but if there is a node correspondence in the range where a certain part of the tree structure is extracted, the function that the drawing data cannot be searched There was the above problem. Therefore, the conventional drawing search method has a problem in that one drawing data cannot be viewed from various search criteria depending on the search purpose, and a drawing that one really wants to search cannot be searched.

The present invention has been made to solve the above-mentioned problems, and it is not possible to simply use the drawing data and the tree structure data of the search condition as they are for the search as in the conventional art. It is an object of the present invention to provide a drawing search method capable of performing many kinds of searches by accurately searching the target drawing by enabling the drawing search by paying attention to the partial similarity of .

[Means for solving the problem]

A drawing search system according to the present invention classifies a drawing and a drawing of a drawing data input by a drawing data input unit 1 into a plurality of types according to a purpose of use, and classifies a symbol and a connecting line, which are constituent elements in the drawing, in advance. By leaving only a limited type of the constituent elements according to the defined criteria and omitting the other constituent elements, the structural information creating means 2 can obtain the structural information data from one input drawing by the number of the predefined criteria. Created and stored in the drawing data storage means 3, and when the drawing is searched, the user searches the drawings defined as the search condition input by the search condition input means 4 from the criteria defined above. Based on the criteria of the search criteria setting means 5 selected according to the purpose, the search structure information creating means 6 creates the search structure information data with the constituent elements omitted, and uses the omitted search structure information data. It is intended to find the drawing data in the drawing search executing means 7 also abbreviated structure information data where stored in the drawing data storage unit 3.

[Action]

The structural information creating unit 2 classifies the drawings of the drawing data input by the drawing data input unit 1 into a plurality of types of symbols and connecting lines which are the constituent elements in the drawing according to the purpose of use and is defined in advance. According to the standard, only a limited kind of the constituent elements are left, and the other constituent elements are omitted, so that the structural information data is created from one input drawing by the number of the predefined criteria, and the drawing data storage means. Accumulate to 3. Further, at the time of drawing search, the search structure information creating means 6 allows the user to select the drawing as the search condition input by the search condition input means 4 from the defined criteria by the user according to the search purpose. Based on the selected criteria of the search criteria setting means 5, the structure information data for search in which the constituent elements are omitted is created. The drawing search executing means 7 uses the omitted structure information data for retrieval to search the drawing data from the same omitted structure information data stored in the drawing data storage means 3.

〔Example〕

FIG. 1 is a block diagram showing the configuration of a drawing search apparatus adopting a drawing search system according to an embodiment of the present invention. In FIG. 1, components corresponding to those shown in FIG. 6 are designated by the same reference numerals, and their description will be omitted. In this embodiment, by introducing the structure information data described later,
This is to search a drawing by paying attention to the partial similarity between both tree structure data that would be ignored if the drawing data and the tree structure data of the search conditions are used for the search as they are as in the conventional art. The partial similarity in the tree structure is not matched by the method of searching by directly matching all tree structures as shown in FIG. 8, for example. Important nodes, in the example of FIG. 8, only the nodes A, B, C, D and E are left, and the others are omitted to create the structural information data. It can be collated with <stored drawing data>.

This is a search using the partial similarity existing between the specific constituent elements selected according to the search purpose in the two-tree structure. Thus, to take advantage of the similarities that exist only between certain types of components in the two tree structure data, and to omit other non-significant components in the two tree structure data. The criterion of is referred to as the search criterion.

In FIG. 1, reference numeral 2 is a structure information creating means for creating structure information data from the drawing data input by the drawing data inputting means 1 in accordance with some predefined search criteria. These structural information data are accumulated by the drawing data accumulating means 3 together with the original drawing data, and at the same time, data for extracting the original drawing data from the structural information data is also stored. Reference numeral 6 is a search structure information creating unit that creates search structure information data from the search conditions input by the search condition input unit 4 according to the criteria set by the search criterion setting unit 5.

More specifically, the structure information creating unit 2 includes a plurality of symbols, which are constituent elements in the drawing, in the drawing of the drawing data input by the drawing data inputting unit 1 according to the purpose of use of, for example, main equipment or measuring equipment. Categorized into multiple types according to the purpose of use, such as main pipes and control pipes, and leave only a limited number of components according to pre-defined criteria, etc. By omitting the constituent elements of, the structural information data is created from a single input drawing by the number of predefined criteria. Further, the search structure information creating means 6 selects the search criterion setting means 5 selected by the user according to the search purpose from the defined criteria for the drawing as the search condition input by the search condition input means 4. On the basis of the criteria of (1), the configuration information data for search in which the constituent elements are omitted is created.

 Next, the operation of the above embodiment will be described.

First, input of drawing data as a database is performed in the following procedure. FIGS. 2 (a) and 2 (b) are examples of an isolation diagram for a power plant as an example of drawings to be input. Before explaining the procedure, these isolation diagrams will be described.

All the equipment of the power plant is managed by equipment drawings called system diagrams, but when inspecting and maintaining the equipment, it is necessary to separate only that part from the entire equipment. This disconnection, called isolation, is actually done by closing some of the valves installed in the middle of the pipe. A drawing in which only these isolated areas are taken out from the system diagram is called an isolation drawing, and there is an isolation drawing for the inspection / facility performed in the past. Examples of the isolated view are FIGS. 2 (a) and 2 (b). FIG. 2 (c) describes the main symbols in the isolated view.

These drawings are input by the drawing data input means 1,
It is encoded and stored by the drawing data storage means 3.
Next, structural information data is created from these drawing data by using the structural information creating means 2 according to some predefined search criteria, and these are also coded by the drawing data accumulating means 3 similarly to the above drawing data. Is memorized.

The structure information data stored in the drawing data storage means 3 is added with data for later drawing out the original drawing data. FIGS. 3A to 3D are examples of the search criteria for creating the structural information used in this embodiment and the structural information created thereby.

Regarding the procedure for creating the structural information data, four examples will be specifically described below. The structural information based on the search criteria focusing on the main equipment in FIG. 3 (a) first eliminates the distinction of the pipes in the designated isolation diagram. There are several types of piping in the isolation diagram, as shown in FIG. 3 (e). Next, the valve is removed from the above isolation diagram. However, those with control parts are left. FIG. 3 (f) shows an example of a valve to be removed and a valve to be left. In addition, the devices considered to be not particularly important are removed from the above-mentioned isolation diagram. Figure 3 (g)
Here are some examples of non-critical equipment that can be removed. When a loop that does not include a symbol is formed in the isolation diagram by the above-described creation procedure, the loop portion is represented by a single line as shown in FIG. 3 (h).

As for the structural information based on the search criteria focusing on the main pipe in FIG. 3 (b), first, pipes other than the main pipe are removed from the designated isolation diagram. And leave all the equipment on the main piping. An example of the main piping is shown in FIG. 3 (b). If there is no main pipe in the above isolation diagram, this structural information is not defined.

As for the structural information based on the search criteria focusing on the control pipe in FIG. 3 (c), first, the control pipe is found in the designated isolation diagram. The control pipe is an instrumentation control pipe connected to a control component as shown in FIG. 3 (i). Next, the equipment at both ends of the control pipe is included in the structural information.
Each of the above equipment is then tied with all the plumbing possible within the scope of the originally specified isolation drawing. Leave all the equipment on the piping used for tying. If there is no control pipe in the isolation diagram, this structural information is not defined. Regarding the procedure for creating this structural information, an example using the isolation diagram of FIG. 3 (j) is shown in FIG. 3 (k).

As for the structural information based on the search criteria that focuses on the measurement pipe in FIG. 3D, first, the measurement device is found in the designated isolation diagram. FIG. 3 (l) shows an example of the measuring device. Then, each of the above measuring instruments is tied with all possible piping within the scope of the originally specified isolation diagram. Leave all the equipment on the piping used for tying. If there is no measuring device in the above isolation diagram, this structural information is not defined.

Next, input, conversion, and storage of drawing data, which is a search key, are performed in the following procedure. The drawing that is the basis of the search key is the second
It is an isolation view similar to a figure. This drawing is input by the search condition input means 4. Next, by the search criteria setting means 5,
The searcher is made to set one of the four structural information criteria shown in FIG. At this time, unless the searcher particularly selects one of the four structure information, the drawing data input by the search condition input means 4 becomes the search key as it is. According to the set criteria of the structure information, the structure information is created by the search structure information creating means 6 from the drawing input by the search condition input means 4, and is converted into the tree structure data similar to FIG.

 Next, the drawing data is searched in the following procedure.

The drawing search executing means 7 requests, from the tree structure data stored by the drawing data accumulating means 3, one to be matched with the tree structure data of the search key obtained in the previous procedure. Then, if the obtained tree structure data is the structure information of the drawing data, the original drawing data is obtained, and the name of the obtained drawing data is displayed on the search result output means 8.

As described above, according to the above-described embodiment, not only the isolated drawing as shown in FIG. 2 which is directly converted into the tree structure data but also the third data is stored in the drawing data storage means.
As shown in the figure, data that simplifies the tree structure itself based on certain criteria is also stored at the same time, so even if the drawing data does not completely include the tree structure of the search key, it can be set by the searcher. If similarities are found in the criteria, it is possible to search. FIGS. 5 (a) and 5 (b) show an example in which the tree structure data is not simply collated but collated by using the structure information.

As described above, in the above-described embodiment, not only the graphic information is extracted from the original shape of the drawing information to be searched, but also the structure information creating means (the structure described in the section of the prior art) is provided before the drawing data accumulating means. (Other than information), the drawing information itself can be omitted and simplified in several ways depending on the user's search purpose.
By re-extracting the graphic information based on these, a new search that has never been possible will be possible.

In the above embodiment, the graphic data serving as the search key is input from the search condition input means 4 and the structural information is created from the graphic data according to the criteria set by the search criteria setting means 5 using the search structure information creating means 6. However, the drawing data or the structure information as the search key may be manually created in the tree structure data. That is, the search condition input means 4, the search criteria setting means
5. The structural information creating means 6 for retrieval may be realized by manual means. However, in this case, much labor and time are required.

In the above embodiment, the drawing data is input from the drawing data inputting means 1 and the structural information is created from the drawing data inputting means 2, but the drawing data inputting means 1 and If the means corresponding to the structure information creating means 2 is provided, the structure information may be created by the existing device.

Further, although the drawing in which the figure is drawn is searched in the above-described embodiment, the drawing in which the image, the pattern, and the like are drawn can be performed with the same configuration.

〔The invention's effect〕

As described above, according to the present invention, by leaving only a limited type of components according to a predefined standard and omitting other components, the predefined standard from one input drawing can be obtained. Create and store as many structural information data as possible, and use the criteria selected by the user from the criteria defined above for the drawings as the search conditions that were input when searching for drawings. Based on the structure information data for search with the constituent elements omitted based on this, and using the structure information data for search omitted, the target drawing is searched from the accumulated structure information data. Focusing on the partial similarity between both tree-structured data, which can be ignored by simply extracting the satisfying screen and using the drawing-structured data or the tree-structured data of the search condition as is in the conventional search. It is possible to search, and many kinds of searches can be performed, so that one drawing data can be viewed from various search criteria depending on the search purpose, and you can search for the drawing you really want to search without being caught by unimportant search elements, Therefore, it is possible to obtain the effect that the target drawing can be accurately searched.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of a drawing retrieval apparatus adopting a drawing retrieval system according to an embodiment of the present invention, and FIGS. 2 (a) and 2 (b) are isolation diagrams input as a database in this embodiment. FIG. 2 (c) is an explanatory diagram of main symbols in the above-mentioned isolation diagram, and FIG. 3 (a) illustrates structural information created on the basis of paying attention to main equipment in this embodiment. FIG. 3 (b) is a diagram for explaining structural information created on the basis of paying attention to the main piping, FIG.
FIG. 3C is a diagram for explaining structural information created on the basis of paying attention to the control pipe, and FIG. 3D is a diagram for explaining structural information created on the basis of paying attention to the measurement pipe. FIG. 3 (e) is a diagram showing the types of piping in the above-mentioned isolation diagram, and FIG. 3 (f) is a diagram showing the types of valves in the isolation diagram, FIG.
FIG. 3 (g) is a diagram showing unimportant devices in the isolation diagram, FIG. 3 (h) is a diagram for explaining processing when a loop including no symbol is generated, and FIG. 3 (i) is control. FIG. 3 (j) is a diagram showing an example of structural information creation based on a search criterion focusing on the control pipe, and FIG. 3 (k) is a search criterion focusing on the control pipe. FIG. 3 (l) is a diagram showing an example of a measuring device in an isolated view, and FIG. 4 is a tree obtained by converting drawing data and structure information in this embodiment. Diagram showing the contents of structural data,
5 (a) and 5 (b) are views for explaining the effect of the embodiment obtained by introducing the structural information, and FIG. 6 is a block diagram showing the configuration of the drawing search device adopting the conventional drawing search system. FIG. 7 is a diagram for explaining a drawing data search process in this conventional example, and FIG. 8 is a diagram showing an example of tree structure data having a similar pattern that cannot be searched in this conventional example.
FIG. 9 is a block diagram showing the configuration of the drawing data storage means in this conventional example. 1 ... Drawing data input means, 2 ... Structural information creation means,
3 ... Drawing data storage means, 4 ... Search condition input means,
5 ... Search reference setting means, 6 ... Search structural information creating means, 7 ... Drawing search executing means, 8 ... Search result output means.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-3-54670 (JP, A) JP-A-3-54669 (JP, A) JP-A-3-62239 (JP, A) IEICE Technology Research Report IE90-8 (1990-5-24) p. 55-60 "Advanced Database System" Symposium (December 1988) P. 33-42 Proceedings of the 39th National Conference of IPSJ (Late 1989) p. 970-971 Proc. Of the 38th National Conference of Information Processing Society of Japan (the first half of 1988) p. 676-677

Claims (1)

[Claims] 1. A drawing data of a drawing in which a graphic image is drawn by using symbols and connecting lines as main constituent elements, and drawing data of a drawing similar to a drawing presented by a user is stored in the drawing data. In the drawing retrieval apparatus for retrieving from drawings, drawing data input means for inputting drawing data to be stored, and constituent elements of each drawing according to some predefined criteria from the drawing data input by this drawing data input means Structure information creating means for creating structure information data in a simplified form, drawing data storing means for storing the structure information data created by the structure information creating means together with the original drawing data, and a search for searching a drawing The user specifies the search condition input means for inputting the conditions and the search criteria for the search using the search condition input by the search condition input means. From among the drawing data accumulated by the drawing data accumulating means, and a search criteria setting means for creating a search structure information data to be used as a search key based on the above search condition and the search criteria. The above-mentioned drawing data input is provided with a drawing search executing means for searching drawing data to be matched with the structure information data for searching and a search result outputting means for outputting the drawing data searched by this drawing search executing means as drawing search results. With respect to the drawing of the drawing data input by means, the symbols and connecting lines, which are the constituent elements in the drawing, are classified into a plurality of types according to the purpose of use, respectively. Only the specified types are left and the other components are omitted, so that the structural information data is converted into the above-mentioned structural information from one input drawing by the number of predefined standards. Created by the creating means and stored in the drawing data accumulating means, and when a drawing is searched for, the user selects from among the above defined criteria for the drawing as the search condition input by the search condition inputting means. Based on the criteria of the search criteria setting means selected according to the search purpose, the structural information for search with the constituent elements omitted is created by the structural information for search creating means and the omitted structural information data for search is used. A drawing retrieval system characterized in that the drawing retrieval execution means retrieves drawing data from the same omitted structure information data that has been stored in advance in the drawing data storage means.