JPH03201033A - Symbol data structure for expert system - Google Patents

Abstract

PURPOSE:To facilitate both a plotting operation and a display updating opera tion by providing each item of the update of display, etc., as the symbol data after turning these items into the routine forms. CONSTITUTION:The symbol data are provided with the group names (an electric power system and a sewerage system) which identify the symbol groups, a knowledge-related declarer showing that a relevant symbol is related to the display processing and the generation/editing of a knowledge base, a non-relative declarer which is used for only the display processing and has no relation with the knowledge, and the intra-block symbol number. Then a symbol identifier, a plotting area which designates an area on a display screen, a graphic block which specifies the display format of a symbol, and a graphic command which specifies a graphic are provided in each symbol in a routine format respectively for specification of each symbol. In such constitution, the data can be systemat ically handled at every symbol and both a plotting operations and a display updating operation can be facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to an expert system for supporting the operation and operation of a plant, and particularly to a symbol data structure.

B9 Summary of the Invention The present invention provides an expert system that uses a system diagram as a display screen, generates and edits the system diagram by combining symbol data, and updates the display according to the system status. This structure facilitates drawing operations and display updates.

C2 Conventional technical expert systems are broadly divided into an execution environment that performs inference using a constructed knowledge base, and an editing environment that generates and edits the knowledge base.

In its execution environment, the Exverter System, which is primarily used to support plant operation and operation, inputs data about the target plant online and executes various support functions based on that data. For example, when applied to electric power systems and sewage treatment facilities, it is possible to obtain inference results such as accident determination and recovery, and whether or not pump operation is possible. These execution statuses and execution results are displayed on various display screens together with various information obtained from the target plant, and command input from the operator is also accepted using the keyboard and mouse.

Figure 2 shows a configuration diagram of an expert system to support plant operation and operation. The knowledge base 1 stores production rules and frame rules for system equipment, and the knowledge base editor 2, keyboard 3, and CRT display device 4 are used to generate and edit this knowledge. The system equipment database 5 stores system diagram data of the target plant. Here, the system diagram corresponds to a drawing that expresses the facilities and equipment of the target plant using graphic data called symbols, and expresses the functions of the plant by arranging and connecting these. This system system diagram data is created using the symbol data of the symbol file 6 by the knowledge base editor 2 or a dedicated drawing editor, and is stored in the database 5. In addition, each graphical data of the system system diagram also includes status data (on/off status and operating status) of the system equipment given through online communication, and is edited according to changes in the status of the system equipment. The execution display processing unit 7 uses the system equipment data in the database 5 to display a system system diagram on the CR7 display device 8.

The inference section 9 performs inference by obtaining knowledge from the knowledge base 1 and system status data from the system equipment database 5 from the display processing section 7 using a compilation method, and causes the inference result to be displayed on the CR7 display device 8 through the display processing section 7.

D1 Problems to be Solved by the Invention In conventional expert systems, system system diagrams are generated and edited using symbol data in symbol file 6, but in the execution environment, each symbol is displayed and updated according to the system system status. . For this reason, symbol data is divided and saved in units of display updates, and in Knowledge Base Editor 2, etc., which generates and edits system system diagrams by combining these, operations to draw system equipment data (symbol definition) and display updates This complicates the operation check and makes symbol recognition difficult.

An object of the present invention is to provide a symbol data structure that facilitates drawing operations and display updates.

81 Means and Effects for Solving Problems In order to achieve the above object, the present invention provides a knowledge base and an inference unit for supporting plant operation and operation using a system diagram as a display screen, and a system diagram display process. In the expert system, the system diagram is generated and edited by an editor with reference to symbol data of a symbol file, and the display is updated in accordance with the system state by the display processing section, wherein the symbol data is a symbol identifier for identifying the symbol. , a drawing area for specifying an area on the display screen, a figure block for specifying the display form of the symbol, and a figure command for specifying the figure are standardized and provided,
By stylizing symbol data, recognition during processing and operations such as drawing is facilitated, and display updating processing can be performed depending on the contents of graphic blocks.

F. Embodiment FIG. 1 shows a symbol data structure illustrating an embodiment of the present invention. The symbol data in the symbol file 6 referenced by the knowledge base editor 2 includes group names (power system and sewage treatment system) that identify symbol groups, as shown in Figure 1.
, a knowledge-related declarator indicating that the symbol is related to display processing and knowledge base generation/editing, an unrelated declarator that is used only for display processing and is not related to knowledge, and the number of symbols in the block. provided.

Next, in order to specify each symbol, a symbol identifier, a drawing area, a graphic block, and a type of graphic command are provided. The symbol identifier has items for the symbol name and corresponding number, and the drawing area has items for the display area declarator of the symbol and its coordinate position in the system diagram. The graphic block specifies the display format of the symbol, and the following four types of display formats are declared in the declarator.

(a) Fixed graphic area (b) Color-changing graphic area (c) Filled graphic area (d) Numerical display area The number of commands represents the number of graphic commands for drawing the block.

Next, the figure command has items for the command name, text data area, display attribute number, and argument.The command name is given as a straight line, rectangle 1 circle, etc., and the argument is the display attribute number, integer value, and real value. and a character, and argument-2 gives the starting point coordinates of the figure, and argument-3 gives the ending point coordinates, etc. in relative coordinates.

In this way, symbol data includes not only knowledge-related declarators and non-related declarators, but also graphical commands, each item of a combination of arguments required for the command, a drawing area, a symbol identifier, and a graphical block that specifies the display format. It is standardized and provided within each symbol.

This structure allows systematic handling of each symbol, and facilitates operator recognition and facilitates checking and definition when generating and editing a system system diagram from the symbol data. In addition, the system system diagram can be displayed by extracting only the data necessary for display from the data given to the system equipment database 5, and the display format can be changed for each symbol without defining display updates individually. Display processing can be performed by referring to the display format, and this display format can also be referenced from the symbol file 6.

Effects of the G3 Invention As described above, according to the present invention, each item such as display update is provided as symbol data in a standardized manner, so that processing in units of symbol data is unified and recognition during drawing operations is facilitated. At the same time, display updating has the effect of facilitating display processing in units of symbol data, as well as facilitating maintenance and checking.

[Brief explanation of drawings]

FIG. 1 is a symbol data structure diagram showing an embodiment of the present invention, and FIG. 2 is a configuration diagram of an expert system. 1...Knowledge base, 2...Knowledge base editor, 5
. . . System equipment database, 6. Symbol file, 7. Execution display processing section, 9. Inference section. Figure 1 Data structure diagram of the embodiment

Claims (1)

[Claims] (1) It is equipped with a knowledge base, an inference unit, and a system diagram display processing unit for supporting plant operation and operation using a system diagram as a display screen, and the system diagram is displayed by referring to symbol data in a symbol file. In an expert system in which an editor generates and edits the display and the display processing unit updates the display according to the system status, the symbol data includes a symbol identifier for identifying a symbol, a drawing area for specifying an area on the display screen, and a symbol display format. A symbol data structure for an expert system, characterized in that a graphic block for specifying a figure and a figure command for specifying a figure are provided in a standardized manner.