JP2021174408A - Assisting device and assisting method - Google Patents

Abstract

To enhance improvements of a technology for assisting design knowledge pertaining to ferrous materials to be shared and passed down.SOLUTION: There is provided an assisting device for assisting design of a ferrous material, comprising a control part 11 and an output part 14. The control part 11, as to a plurality of design items pertaining to characteristic values of the ferrous material, causes the output part 14 to output design assisting information obtained from chaining the design items, based on a cause-effect relationship among the design items.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to support devices and support methods for supporting the design of steel materials.

Knowledge related to the development and design of steel materials is specialized, and although some knowledge remains as documents such as reports and dissertations, it is fragmentary. Also, the knowledge tends to be personal and implicit, with many of the important parts not explicitly stated. In addition, proceeding with development without understanding the precautions and the reasons for determining the design conditions will increase the risk of development failure. Therefore, the designer needs to systematically organize and acquire the knowledge by himself / herself over time. However, resources such as time available for human resource development are limited, and it is desirable to establish an efficient method for transferring knowledge. In addition, the introduction of computational materials science into the steel material development process is being promoted, and computational science experts are also required to have knowledge of development and design. In order to accelerate the promotion of the introduction of computational materials science, it is necessary to establish an efficient method of transferring knowledge.

Katsumi Nitta, "Knowledge Representation and Reasoning in Expert Systems", Information Processing Vol28, No.2, 1987

As a method of describing the design knowledge of steel materials, it is common to describe it in the form of sentences such as papers or textbooks. However, the description method of the text varies depending on the writer, and the explanation may be insufficient and not explicit. Therefore, when design knowledge is described in sentences, it tends to be fragmentary knowledge. Also, when describing additional information, it is not easy because it is necessary to add the information in a form that is in line with the context.

In Non-Patent Document 1, a method of systematically describing knowledge according to rule-based (If-Then) rules is adopted as an expert system in order to process design knowledge by a computer. However, when the amount of design knowledge information is large, the number of If-Then becomes enormous. Further, in Non-Patent Document 1, there are no restrictions on the relationship between If-Then and the description of the rule, and how to connect the content of the if statement (antecedent) and the content below then (consequent) is the rule creator. It was up to you. In addition, although non-patent document 1 describes knowledge representation by network, it is merely a connection between concepts by instance_of, is_a, and part_of, and it is difficult to apply it to sharing and handing down design knowledge of steel materials. ..

The purpose of the present disclosure made in view of such circumstances is to improve the technology for supporting the sharing and transmission of design knowledge related to steel materials.

The support device according to the embodiment of the present disclosure is
A support device that supports the design of steel materials, including a control unit and an output unit, and the control unit
With respect to a plurality of design items related to the characteristic values of the steel material, design support information in which the design items are chained is output to the output unit based on the causal relationship between the design items.

The support method according to the embodiment of the present disclosure is
It is a support method that supports the design of steel materials.
A step of generating design support information in which the design items are chained based on a causal relationship between the design items for a plurality of design items related to the characteristic values of the steel material by the support device.
Steps to output the design support information and
including.

According to the support device and the support method according to the embodiment of the present disclosure, it is possible to improve the technique for supporting the sharing and transmission of design knowledge related to steel materials.

It is a block diagram which shows the structure of the support device which concerns on one Embodiment of this disclosure. It is a figure which shows a part of the directed graph structure. It is a figure which shows a part of the directed graph structure which shows the AND condition. It is a figure which shows a part of the directed graph structure which shows the OR condition. It is a figure which shows an example which represented the design support information by a directed graph structure. It is a figure which shows an example which added additional information to the directed graph structure of FIG. It is a figure which shows a part of a table structure. It is a figure which shows an example which represented the design support information by a table structure. It is a figure which shows an example of the directed graph structure of the comparative example. It is a figure which shows an example which represented the design support information including the rejected design knowledge by the directed graph structure. It is a figure which shows an example which represented the design support information including the design knowledge which may cause a defect by the directed graph structure. It is a flowchart which shows the list of the defect and the process which provides the solution method of the defect. This is an example of design support information related to IF steel shown in a directed graph structure. It is a figure which shows the list of the defect and the checklist which includes the solution method of the defect. It is a figure which shows the partial graph.

Hereinafter, the support device 10 according to the embodiment of the present disclosure will be described with reference to the drawings.

In each figure, the same or corresponding parts are designated by the same reference numerals. In the description of the present embodiment, the description will be omitted or simplified as appropriate for the same or corresponding parts.

The configuration of the support device 10 according to the present embodiment will be described with reference to FIG.

The support device 10 according to the present embodiment includes a control unit 11, a storage unit 12, an input unit 13, and an output unit 14. The control unit 11 includes at least one processor, at least one dedicated circuit, or a combination thereof. The processor is a general-purpose processor such as a CPU (central processing unit) or GPU (graphics processing unit), or a dedicated processor specialized for a specific process. The dedicated circuit is, for example, an FPGA (field-programmable gate array) or an ASIC (application specific integrated circuit). The control unit 11 executes processing related to the operation of the support device 10 while controlling each part of the support device 10.

The storage unit 12 includes at least one semiconductor memory, at least one magnetic memory, at least one optical memory, or at least two combinations thereof. The semiconductor memory is, for example, a RAM (random access memory) or a ROM (read only memory). The RAM is, for example, SRAM (static random access memory) or DRAM (dynamic random access memory). The ROM is, for example, an EEPROM (electrically erasable programmable read only memory). The storage unit 12 functions as, for example, a main storage device, an auxiliary storage device, or a cache memory. The storage unit 12 stores data used for the operation of the support device 10 and data obtained by the operation of the support device 10.

The input unit 13 includes at least one input interface. The input interface is, for example, a physical key, a capacitive key, a pointing device, a touch screen integrated with the display, or a microphone. The input unit 13 accepts an operation of inputting data used for the operation of the support device 10. The input unit 13 may be connected to the support device 10 as an external input device instead of being provided in the support device 10. As the connection method, for example, any method such as USB, HDMI (registered trademark), or Bluetooth (registered trademark) can be used.

The output unit 14 includes at least one output interface. The output interface is, for example, a display or a speaker. The display is, for example, an LCD (liquid crystal display) or an organic EL (electroluminescence) display. The output unit 14 outputs the data obtained by the operation of the support device 10. The output unit 14 may be connected to the support device 10 as an external output device instead of being provided in the support device 10. As the connection method, for example, any method such as USB, HDMI (registered trademark), or Bluetooth (registered trademark) can be used.

The function of the support device 10 is realized by executing the program according to the present embodiment on the processor corresponding to the control unit 11. That is, the function of the support device 10 is realized by software. The program causes the computer to function as the support device 10 by causing the computer to perform the operation of the support device 10. That is, the computer functions as the support device 10 by executing the operation of the support device 10 according to the program.

In this embodiment, the program can be recorded on a computer-readable recording medium. Computer-readable recording media include non-temporary computer-readable media, such as magnetic recording devices, optical discs, opto-magnetic recording media, or semiconductor memories. The distribution of the program is carried out, for example, by selling, transferring, or renting a portable recording medium such as a DVD (digital versatile disc) or a CD-ROM (compact disc read only memory) on which the program is recorded. Further, the distribution of the program may be performed by storing the program in the storage of the server and transmitting the program from the server to another computer. The program may also be provided as a program product.

In the present embodiment, for example, the computer temporarily stores the program recorded on the portable recording medium or the program transmitted from the server in the main storage device. Then, the computer reads the program stored in the main storage device by the processor, and executes the processing according to the read program by the processor. The computer may read the program directly from the portable recording medium and perform processing according to the program. Each time the computer receives a program from the server, the computer may sequentially execute processing according to the received program. The process may be executed by a so-called ASP (application service provider) type service that realizes the function only by the execution instruction and the result acquisition without transmitting the program from the server to the computer. The program includes information used for processing by a computer and equivalent to the program. For example, data that is not a direct command to a computer but has the property of defining the processing of a computer corresponds to "a program-like data".

The input unit 13 of the support device 10 receives input of a plurality of design parameters and design knowledge (hereinafter, also referred to as design items) related to the characteristic values of the steel material and stores them in the storage unit 12. The design items include, for example, the state of the structure of the steel material, the state of the additive element, and the manufacturing conditions. Then, the control unit 11 causes the output unit 14 to output the design support information generated based on the plurality of design items. Design support information is information that supports the design of steel materials, and is a chain of multiple design items based on the causal relationship between the design items.

In the design of steel materials, design items such as structure, composition, and manufacturing conditions are adjusted in order to obtain steel materials having desired characteristics. These design items are not independently related to the characteristic values of the steel material, but depend on the components and manufacturing conditions, and the guidelines such as the structure obtained by these. In this embodiment, paying attention to the causal relationship between the target material state and the guideline for achieving it, the directed graph structure is used as a method for explicitly and systematically describing the design knowledge of the steel material.

FIG. 2 shows a part of the directed graph structure. A directed graph structure is a structure represented by a plurality of nodes and edges connecting the nodes. For example, the manufacturing conditions for obtaining a structure having a small particle size can be described as shown in FIG. 2 by using a directed graph structure. The directed graph structure of FIG. 2 shows the direct relationship between the design items, that is, “the set temperature of the equipment B is lowered” and “the structure becomes smaller”. This is the knowledge to obtain a structure with a small particle size. That is, in the present embodiment, the design knowledge is described by the relationship between a plurality of design items. Here, each design item is represented by each node 21. Further, the causal relationship between each node is represented by the edge 22 with an arrow. The edge 22 has a directional component from the cause to the effect, and the directional component indicates a causal relationship between the nodes.

In addition, FIG. 3 shows another part of the directed graph structure. FIG. 3 is a part of a directed graph structure showing an AND condition. The AND condition is expressed using the node 21, the edge 22, and the hub node 23. For example, the design knowledge that "the r value can be increased" by "increasing the strain near the grain boundary" and "increasing the grain of {x, y, z}" is as shown in FIG. Be expressed. As shown in FIG. 3, when there is a phenomenon that occurs when a plurality of conditions (parameter states), that is, a plurality of design items are satisfied at the same time, the node 21 related to the plurality of conditions is via the hub node 23 by the edge 22. It is connected to the node 21 related to the phenomenon that appears. Specifically, the nodes 21 according to a plurality of conditions are connected to the hub node 23 by the edge 22. Here, the edge 22 has a directional component from the node 21 related to a plurality of conditions toward the hub node 23. Further, the node 21 related to the phenomenon that occurs is connected to the hub node 23 by the edge 22. The edge 22 has a directional component toward the node 21 according to the phenomenon expressed from the hub node 23.

Further, FIG. 4 shows another part of the directed graph structure. Specifically, FIG. 4 is a part of a directed graph structure showing an OR condition. The OR condition is expressed using a plurality of nodes 21 and edges 22. Specifically, when there is a phenomenon that occurs if even one of the plurality of conditions is satisfied, the node 21 corresponding to the plurality of conditions and the node 21 corresponding to the phenomenon are connected by the edge 22. For example, it is assumed that the design knowledge that "the solid solution carbon and the solid solution nitrogen at the grain boundary can be reduced" by either "reducing the carbon component concentration" or "adding titanium" is expressed. In this case, as shown in FIG. 4, the node 21 corresponding to "lowering the carbon component concentration" and "adding titanium" and "reducing the solid solution carbon and the solid solution nitrogen at the grain boundary" correspond to each other. The node 21 is connected by the edge 22. The edge 22 has a directional component from the node 21 according to each condition toward the node 21 corresponding to the phenomenon to be expressed.

The design support information can be systematically expressed by the above-mentioned expression method. FIG. 5 is a diagram showing an example in which the design support information is represented by the directed graph structure by the above-mentioned representation method. Here, an example is shown in which design support information relating to a steel material having excellent press formability called IF steel is expressed by a directed graph structure.

Design knowledge (hereinafter, also referred to as additional information 210) can be added to the design support information. For example, the design knowledge shown in FIG. 2, that is, the knowledge for obtaining a structure having a small particle size may be added to the directed graph structure shown in FIG. FIG. 6 shows a directed graph structure in which additional information 210 is added to the directed graph structure of FIG. In this way, even if you want to add design knowledge later, you only need to add nodes and edges to the original directed graph, and there is no need to review the description content in consideration of the context as in the case of sentences.

In the present embodiment, the design support information is expressed by the directed graph structure, but the design support information may be expressed by another structure. For example, design support information can be represented by a table structure (table format) instead of a directed graph structure. When design support information is expressed by a table structure, for example, the relationship between elements can be shown by adjoining each element (cell). In other words, in the table structure, each design knowledge is used as an element, and the causal relationship between the design knowledge is expressed by adjoining the elements. FIG. 7 is a diagram showing a part of the table structure. In FIG. 7, of the two adjacent elements, the result design item is arranged on the left side, and the element causing the result is arranged on the right side. In the causal relationship table structure, design support information can be described by arranging each element adjacently and connecting them. FIG. 8 shows the design support information represented by a table structure. In this way, the design support information can be described not only in the directed graph structure but also in the table structure.

Here, in the conventional expert system, there are no restrictions on the rules, and it is up to the rule creator how to connect the contents of the if statement (antecedent) and the contents below then (consequent). Therefore, for example, in a conventional expert system,
"If press to produce a steel sheet with excellent formability then lower the finishing temperature"
Can also be described. The description does not specify why lowering the finishing temperature results in a steel sheet with excellent press formability. Therefore, even if a designer other than the rule creator sees this rule, he / she cannot understand the physical basis of the rule and cannot evaluate the validity of the rule.

FIG. 9 shows a directed graph structure of a comparative example. In the comparative example, a case is shown in which a graph structure in which the purpose and the means are linked is described without describing the direct causal relationship. In FIG. 9, it is difficult for non-experts to interpret because it does not show the rationale. On the other hand, since the present embodiment uses design support information in which design items are chained by a direct causal relationship, it is easy for non-experts to understand.

Here, the design support information may include the rejected design knowledge, and the node 21a (hereinafter, also referred to as the rejected node 21a) corresponding to the rejected design knowledge, or the non-adopted node 21a. The edge from the adopted node 21a to the other node 21 may be labeled 24 indicating that it has been adopted or rejected. Not only the design currently adopted as the design knowledge of steel materials, but also the design that has not been adopted is important as knowledge of the reason for determining the conditions. However, such knowledge is held by experts as tacit knowledge and is unlikely to be manifested. Such knowledge can also be described in the directed graph by adding it as shown in FIG. FIG. 10 shows that two methods, "lowering the set temperature of equipment B" and "lowering the set temperature of equipment A", can be adopted in order to "obtain a structure having a small particle size". An adopted or not adopted label 24 is attached to the edge 22 indicating the relationship between the material state and the design guideline. By attaching the label 24, it can be clearly shown that the method of "lowering the set temperature of the equipment A" is not adopted (not adopted). Further, in the design support information, the reason for non-adoption may be added as a balloon 25. By adding the balloon 25, the reason for non-adoption can be clarified, which is useful when considering a new design. As described above, with the directed graph structure according to the present embodiment, the unadopted design knowledge can be easily added to the design support information.

In addition to the design items such as the structure, components, and manufacturing conditions necessary to achieve the final purpose, it is not possible to obtain the desired characteristics by grasping the knowledge about the points to be noted in the design. It is important to reduce the risk of For example, suppose that there is knowledge that the carbon component concentration should be lowered in order to increase the r value. However, if the carbon component concentration is low, there is a problem that the welding strength deteriorates, so care must be taken in adjusting the components. Therefore, the design support information according to the present embodiment may include design knowledge that may cause a defect. FIG. 11 is a diagram showing an example in which design support information including design knowledge that may cause a defect is represented by a directed graph structure. The design support information of FIG. 11 includes a node 21b (hereinafter, also referred to as a defect cause node 21b) corresponding to design knowledge that may cause a defect. The defect-causing node 21b, the edge 22 from the defect-causing node 21b toward the defect node (hereinafter referred to as the defect node 25), or the defect node 25 are labeled to indicate that a defect may occur. You may. Alternatively, the defective node 25 may have a different display mode (shape, color, font, etc.) from the other nodes. As a result, it can be clearly shown that the node indicates the information related to the defect. For example, in FIG. 11, in order to “increase the r value”, it may be necessary to perform an operation of “decreasing the concentration of the carbon component”. Then, when the operation is performed, it can be grasped from the node 21, the cause node 21b of the defect, the defect node 25, and the edge 22 that there is a risk of the defect that the welding strength is lowered. Here, we focused on one defect that "welding strength decreases", but even if there are multiple defects, the entire risk of the defect can be grasped by tracing the relationship between them in the same manner. Further, the defect node 25 may be connected to the defect node 25 which is secondary or tertiary caused by the defect. FIG. 11 shows that when the carbon component concentration is lowered, the following problems are associated with each other.
"Quenchability decreases" → "HAZ becomes softer" → "Welding strength decreases"

Further, the design support information may include knowledge on how to solve the defect. When attempting an operation with a new design, the designer needs to be aware of defects associated with the affected design item in addition to defects associated with the design item related to the new setting. Therefore, for example, as shown in FIG. 11, it may be indicated that "boron is added" as a countermeasure for "decreasing hardenability" as a solution method and precautions for solving the problem. Further, a label 26 indicating the elimination method may be attached to the edge 22 to clearly indicate that the elimination method is used. Hereinafter, the node to which the edge to be connected with the label 26 of the resolution method is attached is also referred to as a resolution method node 27. The resolution method node 27 may have a different display mode (shape, color, font, etc.) from other nodes. This makes it easy to understand that the node is the solution method. In addition, precautions relating to the elimination method may be added as a balloon 28. By adding the balloon 28, the precautions related to the elimination method can be clarified, which is useful when the elimination method is used.

Next, the information processing executed by the support device 10 according to the embodiment of the present disclosure will be described. When knowledge of steel material design is described in a directed graph structure, the size of the graph becomes enormous according to the amount of knowledge described, and it may be difficult to grasp the risk of important defects related to design risk. Therefore, the support device 10 according to the present embodiment is provided with a search function so that the risk of malfunction can be easily grasped. Specifically, the support device 10 receives input of a keyword related to a design item from the input unit 13. The keyword is a character string related to a design item that attempts at least one of operation and change. The support device 10 may provide a corresponding defect and a method for solving the defect based on a label attached to a node or an edge connected to a design item corresponding to the keyword in a chain of causal relationships. FIG. 12 is a flowchart showing a list of defects and an example of processing for providing a method for solving the defects.

First, the control unit 11 receives the input of the keyword via the input unit 13 (step S10). Next, the control unit 11 searches for a node 21 including the keyword based on the keyword acquired in step S10, and stores a set of the corresponding nodes 21 (hereinafter, also referred to as a node set) in the storage unit 12 in a list format. (Step S20).

Subsequently, the control unit 11 traces the cause side node 21 for each node 21 of the node set, and extracts the cause node 21b of the defect. The control unit 11 saves the information of the extracted defect cause node 21b in the storage unit 12 (step S30). The process of "following the node on the cause side" is a process of searching for the connection relationship of the nodes toward the node side in which the design item corresponding to the cause is described among the two nodes connected by the edge. In other words, the control unit 11 traces the nodes toward the cause side based on the chain of causal relationships between the nodes. Then, the control unit 11 extracts and saves the cause node 21b of the defect.

Subsequently, the control unit 11 searches for the defect node 25 connected to the stored defect cause node 21b. Further, the control unit 11 traces the result side node from the defect node 25, and extracts the defect node 25 secondarily brought about by the defect node 25. In other words, the control unit 11 extracts the defective node 25 connected to the defective node 25. The process of "following the node on the result side" is a process of searching the connection relationship of the nodes toward the node side in which the design item corresponding to the result is described among the two nodes connected by the edge 22. The control unit 11 stores the information related to the extracted defective node 25 in the storage unit 12. Further, the control unit 11 saves the connection relationship of these nodes based on the directional component of the edge 22 (step S40).

Subsequently, the control unit 11 extracts the resolution method node 27 connected to the defect node 25 with respect to the defect node 25 saved in step S40. Further, the control unit 11 stores the resolution method node 27 in the storage unit 12. Further, the control unit 11 saves the connection relationship of these nodes 21 and the information of the caution balloon 28 connected to the resolution method node 27. Further, the control unit 11 saves the connection relationship between the node 21 and the balloon 28 based on the directional component of the edge 22 (step S50).

Subsequently, the control unit 11 extracts the precautions connected to the resolution method node 27 saved in step S50. Further, the control unit 11 stores the precautions in the storage unit 12. Further, the control unit 11 stores the connection relationship of these nodes in the storage unit 12 based on the directional component of the edge 22 (step S60). Further, the control unit 11 may store the information related to the resolution method node 27 in the storage unit 12 in association with the information.

Subsequently, the control unit 11 outputs the information stored in the storage unit 12 in the form of a list and a subgraph by the output unit 14 (step S70). The subgraph is a part of the design support information represented by the directed graph structure, and includes a defect cause node 21b, a defect node 25, a resolution method node 27, and a caution balloon 28. The subgraph can cover the cause node 21b of the defect and the information related to the node. In other words, the subgraph allows the user to easily understand the mechanism that adversely affects the characteristic values of the steel material. In addition, the user can grasp how to eliminate the adverse effect.

As described above, according to the embodiment of the present disclosure, since the support device 10 presents the design support information in which the design items are chained based on the causal relationship between the design items by the directed graph structure or the like, the designer is a steel material. It is possible to systematically grasp the whole picture of the design knowledge of. In addition, in the design support information, each design item is linked based on a causal relationship, so even when adding design knowledge, it is only necessary to combine the design items with one of the design items, and it is easy to add information. You can. Further, the design support information according to the present embodiment may include a node related to the design knowledge that has been rejected and a node related to the design knowledge that may cause a defect. By doing so, the designer can grasp the precautions for the design, the reason for determining the design conditions, and the like, which are tacit knowledge. Therefore, even a non-expert in steel materials can easily acquire design knowledge, have a high educational effect, and can efficiently share and pass on knowledge. That is, according to the embodiment according to the present disclosure, it is possible to improve the technique for supporting the sharing and transmission of design knowledge related to steel materials.

(Example)
Hereinafter, the processing according to one embodiment of the present disclosure will be described, but the present disclosure is not limited to this embodiment. In this embodiment, the case where the target steel material is IF steel is shown. IF steel is one of the steel materials having excellent press formability. FIG. 13 shows the design support information related to IF steel in a directed graph structure. In this way, the directed graph structure can clarify the relationship between the material state and the design guideline, and can systematically describe the entire knowledge by chaining information, so that even non-experts can easily understand it. Since the directed graph structure shown in FIG. 13 also includes information on the rejected design policy, possible defects, and how to solve the problems, the user can grasp the whole picture of the knowledge related to the design and is regarded as tacit knowledge. It is also possible to grasp the precautions for design and the reason for determining the design conditions.

When material development / design is performed with the purpose of "increasing the r value" using the design support information related to the IF steel, the control unit 11 of the support device 10 is operated via the input unit 13. It is assumed that "increase the r value" is accepted as the keyword of. In this case, a process for providing a list of defects and a method for solving the defects is executed according to the flowchart shown in FIG. FIG. 14 is an example in which the control unit 11 outputs the information stored in the storage unit 12 to the output unit 14 in a list format. Each line in the list represents each element to keep in mind. The list also includes five columns: "final defect", "cause", "solution", "caution", and "defect mechanism". The "final defect" column indicates an undesired final defect (result) given to the characteristic value of the steel material for the matter of "increasing the r value". The "Cause" column shows the design items that caused the final failure. The "Solution" column shows the countermeasures that are design guidelines that can be adopted to prevent problems. The "Caution" column shows the relevant precautions when there are precautions when taking a solution. In the "Fault Mechanism" column, a button to display a subgraph is displayed.

For example, the top row of FIG. 14 shows the possibility of a final defect of "welding strength decreasing". From this, it can be seen that when developing and designing materials in order to "increase the r-value", it is necessary to consider whether or not boron (B) should be added in order to prevent problems. The cause of the problem is "lowering the carbon component concentration". On the other hand, as a point to be noted when adding boron, "the r value decreases" is shown as a precaution.

When you press the button displayed in the "Fault Mechanism" column, a subgraph related to the fault in that row is displayed. The subgraph shows a defect occurrence mechanism, which is what kind of defect is caused by the "cause process" in the row. FIG. 15 shows a screen displayed when the button in the top row is pressed. Here, it is shown that by "reducing the carbon component concentration", "hardening property is lowered", and as a result, the final defect of "welding strength is lowered" may occur. In addition, the resolution method node indicates that the addition of boron displayed in the check item of the relevant line is to eliminate the "hardenability" in this defect occurrence mechanism. There is. The subgraph presented here is a part of the directed graph structure of the design support information of IF steel shown in FIG. 13, and is a countermeasure "reduce the carbon component concentration" which is the cause of the final defect and the defect. Only the subtrees that connect "Add Boron" are displayed. By displaying only the subtree, the user can easily understand the mechanism by which the defect occurs. In this way, according to this embodiment, a checklist for dealing with the risk of a defect can be presented to the user from the knowledge of the created graph structure, and the check can be performed by presenting supplementary information such as the cause of the defect. It is also possible to explicitly indicate the intention. This prevents omissions in dealing with the risk of defects and enables efficient design development even by designers with little knowledge.

Although the present disclosure has been described based on the drawings and examples, it should be noted that those skilled in the art can easily make various modifications and modifications based on the present disclosure. It should be noted, therefore, that these modifications and modifications are within the scope of this disclosure. For example, the functions and the like included in each configuration or each step and the like can be rearranged so as not to be logically inconsistent, and a plurality of configurations or steps and the like can be combined or divided into one. ..

For example, the support device 10 may automatically generate design support information. Specifically, for example, the control unit 11 of the support device 10 automatically determines the causal relationship between the design items based on the attribute information associated with each design item, and generates the support information. The attribute information is, for example, information related to a causal relationship, and includes information on other design items that affect when a certain design item is changed. By automatically generating design support information by the support device 10 in this way, it is possible to improve the technology for supporting the sharing and transmission of design knowledge related to steel materials.

10 Support device 11 Control unit 12 Storage unit 13 Input unit 14 Output unit 21 Node 21a Not adopted node 21b Cause of failure Node 22 Edge 23 Hub node 24 Label 25 Defect node 26 Label 27 Resolution node 210 Additional information

Claims (9)

A support device that supports the design of steel materials, including a control unit and an output unit, and the control unit
A support device for outputting design support information in which the design items are chained to the output unit based on a causal relationship between the design items for a plurality of design items related to the characteristic values of the steel material. The support device according to claim 1.
The design support information is a support device having a directed graph structure in which each design item is a node and the nodes are connected by an edge having a directional component from a cause to an effect to represent a causal relationship between the design items. The support device according to claim 1.
The design support information is a support device having a table structure in which each design item is an element and the elements are adjacent to each other to represent a causal relationship between the design items. The support device according to claim 2.
The design support information includes a node related to the design knowledge that has been rejected, and the control unit determines that the node related to the design knowledge that has been rejected or an edge from the node to another node is not adopted. A support device for outputting the information with a label indicating that the node has been used to the output unit. The support device according to claim 2.
The design support information includes a node related to design knowledge that may cause a defect, and the control unit is directed to a node related to design knowledge that may cause a defect or an edge from the node to another node. , A support device for outputting the information with a label indicating that a defect may occur to the output unit. The support device according to claim 5, wherein the design support information includes a solution method node related to knowledge for solving the defect, and the control unit is a control unit.
When the input of the keyword related to the design item is accepted, the defect corresponding to the label and the defect are based on the label attached to the node or edge connected to the design item corresponding to the keyword in a causal chain. A support device that outputs a method of solving the problem to the output unit. The support device according to claim 6, wherein the control unit is
A support device for outputting a subgraph including a node related to the cause of the problem and the solution method node to the output unit. The support device according to claims 1 to 7, wherein the control unit is
A support device that automatically determines a causal relationship between the design items based on the attribute information associated with each design item and generates the design support information. It is a support method that supports the design of steel materials.
A step of generating design support information in which the design items are chained based on a causal relationship between the design items for a plurality of design items related to the characteristic values of the steel material by the support device.
Steps to output the design support information and
Support methods including.

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