JPH0514941B2 - - Google Patents

Description

[Detailed description of the invention] A. Industrial application field The present invention is applicable to electric power, gas,
It is a graphical display device in which a graphic CRT display device is connected to the terminal side of business processing equipment in fields where operational work is performed using equipment such as water supply and communication lines, and is particularly suitable for displaying equipment targeted for operational work. The present invention relates to a graphic display device having characteristics.

B. Summary of the Invention The present invention provides electric power, gas,
In a graphic display device consisting of a graphic CRT display device connected to the terminal side of a business processing device used in the field of operating operations using facilities such as water supply and communication lines, the center and scale of the display screen can be adjusted according to the operator's request. By storing it together with the name of the display item specified at the time of the screen display request, and displaying it on the CRT monitor by cutting out graphic information with the display center and scale memorized by the display item name instruction for the next display. , At the start of operational work, it is possible to easily obtain a screen with display conditions corresponding to previously memorized display items by simply instructing display item names.

Hereinafter, the present invention will be described using an example of application to a power system, particularly a power distribution system.

C. Conventional technology Graphic CRT display devices have been
They are mainly used for offline work such as creating and modifying figures in fields such as CAD, CAM, and CAE, but recently their use as terminal devices for online systems has been increasing.

For example, in a centralized power distribution system monitoring and control system, a central computer serving as the master station processes a large amount of information from a group of slave stations, but this information processing relies on the visual recognition, judgment, and creativity of humans. A graphic CRT display device is available to enable quick and accurate online processing.

In this centralized monitoring and control system, the graphic CRT display device that serves as the terminal device is required to have the following two points in terms of function and performance compared to conventional ones.

(1) High-speed display: Good responsiveness is an essential condition for online systems, and the process from display request to display completion must be performed quickly, and various display updates must also be performed quickly.

(2) Support for wide area: Since the online system is operated for equipment installed in a wide area, it must support a wide display area and be able to display the necessary range according to display requests.

In order to meet these demands, a system configuration called an intelligent terminal type has been adopted as a graphic display system. As shown in FIG. 2, this system has a graphic CRT display device 1 equipped with a computer as a terminal side, and a host computer system 2 is connected to this terminal side via a communication line. Using this host computer system 2 as a master station, the slave stations collect various types of monitoring information in real time, display necessary display information on the graphics CRT display device 1, and receive commands from the graphics CRT display device 1 side and the host A centralized monitoring control system is realized by a configuration in which control information automatically processed by the computer system 2 is transmitted from the host computer system 2 to the slave station side.

In this configuration, the host computer system 2 is made to perform a large amount of arithmetic processing or data processing,
A distributed processing system is adopted in which the computer in the terminal-side graphic CRT display device 1 performs display processing, thereby reducing the load on the host computer system 2 while improving responsiveness on the terminal side. The graphic display process in the configuration shown in FIG. 2 will be described in detail below.

The graphic CRT display device 1 performs refresh drawing using a raster scan display method.
It has a CRT monitor 3, a display processor 4 as a control center, and graphic information (information such as line segments, symbols, characters, etc.) to be displayed is stored in a segment buffer ₅₁ . The graphical information stored in the segment buffer ₅₁ includes the individual graphical elements located at the lowest level (data type that specifies the displayed graphic, display position,
A tree structure is formed by SD (display color, etc.) and attribute elements SP, which are located above these graphic elements SD and define the attributes (visible attributes, detection attributes, etc.) of each graphic element.

From the graphic information stored in the segment buffer ₅₁ , graphic information in a range (rectangular area determined by coordinate values) required to be displayed is cut out. This cutting process includes a matrix calculation processing unit 5 ₂ that performs parallel translation and rotation transformation of the displayed figure;
A clipping processing unit ₅₃ is provided for removing portions of the CRT monitor 3 that extend beyond the displayable screen frame.
Furthermore, a digital differential analysis (DDA) processing section ₅₄ is provided which develops the cut out graphic information line segment from the display position (coordinate position) into bit on/off information on the frame buffer 6 corresponding thereto.

The frame buffer 6 is physically a memory that has bits that correspond one-to-one to each pixel on the screen of the CRT monitor 3. For color display, it has multiple bit planes and uses the lookup table 7. to determine the display color. This will be explained with reference to FIG. The figure shows a case where the frame buffer 6 has three bit planes #1, #2, and #3.
The on/off state of the bits corresponding to the graphic information of the segment buffer ₅₁ is developed as a combination of bit planes #1 to #3. The display on the CRT monitor 3 is then raster scanned on the frame buffer 6, and each bit plane #1 to
Each beam output of R (red), G (green), and B (blue) is given to the CRT monitor 3 according to the display color table defined in the lookup table 7 using the bit-on combination value of #3 as an address.

Returning to FIG. 2, the host computer system 2 uses the host computer 8 as a control center,
As one of the processing functions of online processing, data processed with graphic information is divided into appropriate formats and stored in an auxiliary storage device 9 such as a magnetic disk, and graphic information within the range required by the graphics CRT display device 1 is transferred to the interface. Ace 10, 11, transmission line 1
The received data is transmitted to the graphic CRT display device 1 through the communication line 2, and the received data is stored in the segment buffer ₅₁ in the graphic CRT display device 1.

D Problems to be solved by the invention When using a graphic CRT display device as a terminal device for a centralized monitoring and control system for power systems and equipment,
Among the above (1) high-speed display and (2) wide area support, wide area support is for equipment installed in a wide area, as shown in Figure 5, which shows an example of the power distribution system display. Because only a portion of the equipment system is displayed due to screen limitations, a function is provided to switch and display the necessary range according to the operator's request.

For this necessary range switching display, for example, the operator indicates the name of a distribution substation or distribution line, and the host computer memorizes the display center position and scale for these names, and when the display request is made. The display center position and scale are searched from the name, and a display request is made to the graphic CRT display device based on them.

In this way, when specifying a name and determining the display center position and scale for the name, the following conditions are established as initial settings within the host computer system.

(D-1) When specifying the name of a distribution substation. In this case, the display center position is set to the location where the building of the substation is located, and the scale is set to a large scale such as 1/4000. This is because distribution substations typically supply power to a large number (10-20) of distribution lines, which can be displayed on a monitor.

(D-2) When specifying the name of a power distribution line. In this case, the display center position is set to the position where the rising equipment of the distribution line is located, and the scale is set to, for example, 1/2000 in order to display the distribution line and the distribution lines in its vicinity on the monitor.

In this way, the display center position and scale are determined as initial setting values, but this may not be appropriate for operational purposes.
For example, when specifying the name of a distribution line, the rising equipment of the distribution line is not necessarily located in the center.
As shown in Figure a, if the rise based on the initial setting value is centered on the monitor, if the equipment is spread out only to the right from the rise, the display will be inappropriate, and as a result, the display will be It is necessary to change the display position by scrolling or the like as shown in FIG. 6b.

Regarding the scale, since the supply area of each distribution line is different, as shown in Fig. 6b, the display is smaller than the tube surface of monitor 3 because the supply area of the distribution line is narrow with the initial setting value. become.
At this time as well, the scale is changed so that the tube surface has an appropriate spread as shown in FIG. 6d.

In this way, using only the initial setting values requires operations and functions to change and switch the center position and scale.

Next, in the centralized monitoring and control system for electric power systems and equipment, there is a need to change the display conditions as described below in order to carry out various operational tasks.

For various operational tasks such as accident recovery, normal operation, and maintenance, a subject is determined and the tasks are carried out under that subject. When working on a certain subject, depending on the type of work and cross-section, you may need to draw a graph at a specific display center and scale.
When displaying and operating a power distribution system diagram on a CRT and then starting work related to that subject, you may need to use the same display center and scale as before.

In this case as well, it is necessary to move the display range or change the scale until the appropriate area is displayed, which causes a problem in that the operation time becomes complicated and the operational work is delayed.

These problems occur not only in power systems installed over wide areas, but also in the operations of facilities such as gas, water, and communication lines.

E Means and Effects for Solving the Problems In view of the above problems, the present invention provides display information consisting of a display item group corresponding to each facility such as an electric power system, and a display item group corresponding to map information such as streets and place names. A graphical display device that stores information in a storage device, specifies an area to be cut out and displayed from the stored display information, and displays equipment in that area on a graphic CRT display device in correspondence with a map. , there is a means for storing the display screen center and scale of graphical information displayed on a CRT monitor as display conditions together with display items specified at the time of a display request in the host computer side or display processor, and displaying it in the next operation operation. When the display items are instructed when performing the above operations, processing means is provided for displaying on a CRT monitor by cutting out graphic information with the center and scale of the screen under the display conditions stored last time, and for the second and subsequent operation operations. This allows you to directly obtain the screen under the previous display conditions by simply specifying the display items.

F. Embodiment FIG. 1 shows a display switching/updating mode diagram in which the processing method of the present invention is applied to a power distribution system. In the diagram, the mark indicates the main switch (or section switch), the □ mark indicates the link switch, the line segment connecting these switches indicates the distribution line, the 〓 mark indicates the starting point of the distribution system, and the diagonal block shows the display screen on a CRT monitor.

In Fig. 1, a indicates the point where when the operator indicates the distribution line name □A, the host computer 8 graphs the graphical information centering on the rising point of the name □A.
The state shown is applied to the CRT display device 1 and displayed on the CRT monitor 3 of the display device 1. For this display state, the display screen required by the operator is
Assuming that the position is as shown in Figure e, initially, the center points P ₁ to P ₄ are sequentially indicated on the display screen as in the conventional case, and the screen shown in e is obtained through screen switching from a to d. Alternatively, the screen shown in e can be obtained by giving a scroll instruction in the order of a to e.

These display switching and updating processes are performed by the operator's instructions and by the host computer 8 and display processor 4, respectively. Also, scaling processing and display for the display screen are executed. In these processes, the host computer 8 makes an inquiry to the display processor 4 in response to an instruction to change display conditions from the operator, and stores the center s and scale of the final display screen (FIG. 1e).
Then, the next time the same system name □A or subject is requested to be displayed, the host computer 8 retrieves the center s and scale of the display screen under the previous memory display conditions for the name □A or subject, and displays the screen in question. The graphical information is given to the graphic CRT display device 1 to display the display screen under the previous display conditions.

Therefore, for the first time, the display is changed and updated sequentially from the start point in response to the system name or subject command, but from the second time onwards, the display screen under the previous display conditions is changed according to the system name or subject command. can be displayed directly.

G. Effects of the Invention As described above, according to the present invention, the information necessary for screen display under the previous display conditions is memorized by the operator's instructions, and the information necessary for displaying the screen under the previous display conditions is stored, and the information necessary for displaying the screen under the previous display conditions is stored, and the information required for screen display under the previous display conditions is stored, and the information necessary for screen display under the previous display conditions is stored, and the information necessary for screen display under the previous display conditions is stored, and the information necessary for screen display under the previous display conditions is memorized, and the information necessary for displaying the screen under the previous display conditions is stored, and the information necessary for screen display under the previous display conditions is stored, and the information necessary for screen display under the previous display conditions is stored, and the information necessary for screen display under the previous display conditions is stored, and the information necessary for displaying the screen under the previous display conditions is stored, and the information required for displaying the screen under the previous display conditions is stored, and the information required for displaying the screen under the previous display conditions is stored, and the information necessary for displaying the screen under the previous display conditions is memorized. Screen information under the display conditions is directly extracted and displayed on the CRT monitor, making it easier for the operator to obtain the screen of the target equipment such as the power system, while also allowing the host computer and display processor to Processing can be simplified and business operations can be performed smoothly.

[Brief explanation of the drawing]

Figure 1 shows how to switch the display of the power distribution system according to the present invention.
A diagram for explaining the update mode, Figure 2 is a configuration diagram of the power system/equipment monitoring device, Figure 3 is a segment structure diagram of the graphic information handled in Figure 2, and Figure 4 is a diagram of the configuration of the power system/equipment monitoring device.
FIG. 5 is a diagram illustrating the bit development and color display processing of graphic information in the figure, FIG. 5 is a diagram illustrating display graphics on a CRT monitor, and FIG. 6 is a diagram illustrating display changes and switching modes. 1... Graphic CRT display device, 2... Host computer system, 3... CRT monitor,
4...Display processor, ₅₁ ...Segment buffer, ₅₂ ...Matrix calculation processing unit,
5 ₃ ... Clipping processing section, 5 ₄ ... DDA processing section, 6 ... Frame buffer, 7 ... Lookup table, 8 ... Host computer, 9 ...
Auxiliary storage device, 10, 11...interface, 12...transmission line.

Claims (1)

[Claims] 1 Graphic CRTs are installed on the terminal side of business processing equipment in fields where operations are performed using equipment such as electric power, gas, water, and communication lines installed over a wide area.
A display device is connected, and display information consisting of a display item group corresponding to the equipment and a display item group corresponding to map information such as streets and place names is stored in the storage device, and the stored display information is By specifying the area to be cut out and displayed, the equipment in that area can be mapped and displayed on a graphic CRT.
In a graphic display device that displays on a display device,
A means for storing the display screen center and scale of graphical information displayed on a CRT monitor in the host computer or display processor along with display items specified at the time of display request as display conditions, and displaying it in the next operation operation. When the display item is specified at the time, the CRT is
A graphic display device characterized by comprising processing means for displaying on a monitor.