JPH0752453B2 - Drawing display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to a drawing display device for displaying drawing information in which facilities to be managed are superimposed on a map on a graphic display device based on a request from a host computer. Is.

B. Outline of the invention A device for a host computer to capture the status information of each facility online and to display it in real time on a graphic display device. Based on the information, the presence or absence of the status change of each equipment and the current status are recorded in the host computer, and the presence or absence of the status change of the equipment based on the simulated operation is also recorded. By updating the status of the graphic display device for the equipment that has undergone a status change based on the recorded contents, it is possible to speed up the current restoration process associated with the simulated change.

C. Problems to be solved by conventional technologies and inventions Maps can represent various human activity information such as local natural conditions, population facilities, and population / economic conditions, and have been used for a long time in the aspect of administration. . Even now, the national government, local governments, fire departments, etc., use it as a basis for regional planning and management. In addition, in public enterprises such as electricity, telephone, and gas, we have our own facilities (power lines, telephone lines,
For the planning and management of gas pipes, the drawings of the facility are used on the map. These maps and facility diagrams are drawn as drawings on paper, and the information drawn is called drawing information in this specification.

In recent years, attempts have been made to draw these drawings with a computer and process drawing information with a computer. This was pioneered by the United States and has been carried out since the 1960s. Such a computer system is called a drawing information processing system. Today, it is used by federal, state, and local governments, as well as by public companies such as electricity, telephone, and gas, and private companies such as marketing.

In Japan, we started research later than in the United States, but we have started researching databases, computer graphics, etc.
It successfully absorbs the technological development during that time and shows its own development. It can be said that the government, local governments, fire departments, and public enterprises such as electricity, telephone, and gas have finally reached the stage of practical use.

A feature of each of the drawing information processing systems is that a drawing display device can be connected to display a drawing. The host computer manages the drawing information, and controls to display the requested portion of the drawing on the graphic display device according to the operator's request. The graphic display device displays a requested portion of the drawing in response to a request from the host computer. In the drawing information processing system, a portion that realizes the function of displaying a drawing by the host computer and the graphic display device is hereinafter referred to as a drawing display device.

In a drawing information processing system, it is basically used to proceed with processing by an interactive operation with an operator centering on a drawing displayed on a graphic display device.
Therefore, the responsiveness of the drawing display function is strongly required. However, since the host computer performs various general-purpose tasks in addition to the drawing display processing, the steady load is large, and the effect of improving the performance of the host computer cannot be expected. Rather, the steady load tends to increase due to the increase in information to be processed and the demand for higher functionality, and the display processing on the host computer becomes a burden. Therefore, in order to reduce the load on the host computer and improve the responsiveness of the display processing, there is a tendency that the graphic display device becomes more intelligent. That is, most of the graphic display functions are performed by the graphic display device. Less than,
The graphic display device having the configuration shown in FIG. 6 will be described in detail.

First, the graphic display device has a host interface (HIF) that transmits and receives data to and from the host computer. H
The IF receives various display instructions and graphic information from the host computer and transmits them to the display processor (CPU). Also, upon request from the host computer, it receives various display-related information from the CPU and sends it to the host computer.

The segment buffer (SB) is a descriptive representation (numerical value, symbol)
It is a memory for storing the graphic information of. The graphic information is
It is managed in a hierarchical structure. The lowest layer is a concrete figure entity (display figure shape, position coordinates, display color, etc.). It is what is called an IDB. These several IDBs collectively form a segment. Each segment has information on various attributes (visible attributes, detection attributes, etc.). Both IDB and segment have names, and various operations can be performed by specifying the names. It should be noted that the position coordinates of the graphic entity do not directly indicate the pixel position on the tube surface, but are called coordinates on a virtual large screen, so-called world coordinates.

With respect to the graphic information stored in this SB, the graphic information in the range requested to be displayed (a rectangular area determined by world coordinate values) is cut out. For this cutting process,
A matrix calculator (MTX) that performs parallel movement and rotation conversion of the displayed figure, and a clipping device (CLP) that removes the part that extends beyond the displayable area corresponding to the CRT monitor (CRT) are available. In addition, a digital differential analyzer (DDA) is provided that expands the segment of the graphic information of the cut descriptive representation into the ON / OFF information of the bit on the frame buffer (FB) corresponding to the display position coordinate. .

The frame buffer (FB) is a memory that has one-to-one bits for each pixel on the tube surface of the CRT, at least to the extent corresponding to the number of pixels on the tube surface. In color display, a plurality of memory planes are provided, and a set of bits corresponding to the same pixel is arranged in each plane to form column data, which is used as a color code of the pixel corresponding to the bit. Furthermore, in recent years, there is a lookup table (LT), which is also known as a color map, in which color codes are stored in advance, and the column data of the above bit is used as an address, and the content of the address in LT is read out to obtain the color code of the corresponding pixel. The graphic display device is called the mainstream. In such a graphic display device, overlay priority display is possible. That is, first FB
The priority order is set for each plane, and the priority order that indicates which one of the figures to be displayed is prioritized when they are superimposed is set in advance. Next, for each LT address, store the display color code of the graphic to be developed on the plane with the highest priority among the combinations of planes whose bit contents are on, in the LT portion of that address. . Then, the graphic in the display range is cut out from the SB, and each graphic is bit-developed on the plane of the FB corresponding to the priority. On the other hand, when some figures in each plane overlap, LT is referenced with the bit string corresponding to the pixel of the overlapped portion as an address.
Since the color code of the highest-priority display graphic when the graphic groups of the planes corresponding to the "ON" bits of the addresses overlap is previously stored in the address part, the overlay priority display is realized. This will be described with reference to FIG. There are display figures ●, ▲, and ■, and the priority of overlay priority display is in this order. The display colors are red, green, and blue. FB plane priority is P2, P1,
The order is P0. Displayed figures ●, ▲, ■ are P2, P1, respectively
Bits shall be expanded to P0. It is assumed that a set of bits corresponding to one pixel read from each plane of FB are arranged in the order of P2, P1, P0 from the highest rank and serve as a reference address of LT. The following shows the combination of overlapping graphics in each pixel, the corresponding LT reference address and the corresponding
Indicates the LT contents. (Where the bit content of the address is ×,
0/1 Indicates that either is acceptable. ) The figure also shows the combination of overlapping figures. The numbers written on the surface surrounded by the line segments are the numbers given to the above-mentioned graphic overlapping combinations. The screen displayed on the tube surface as described above is as shown in the figure.

LT is a table that stores the brightness of the three primary colors of R, G, and B. A unique color is expressed by combining the R, G, and B luminance colors stored at each address.

The video interface (VIF) reads the contents of FB and uses the bit string corresponding to each pixel as an address to read the color code of LT to read the video signal (R, G,
B, separate, composite) and sync signal to CRT (vertical sync signal: VD, horizontal sync signal: H)
D) is generated. These operations are independent of the control of the CPU and are always executed at high speed and cyclically. The mechanism until the video signal is generated will be described with reference to FIG. The VIF generates a bit address (FBAD) corresponding to a pixel for each plane of FB. Thus, the read bit contents are arranged at respective predetermined positions to create the LT reference address. The content of the corresponding LT is read out in R, G, B units by this LT reference address. The read contents are sent to the DA converter. Here, D-A conversion is performed to generate R, G, B video signals, respectively. The above processing is performed one after another in the order in which the pixels are arranged. Since these are executed at extremely high speed and cyclically, they appear as a single screen to human eyes, aided by the afterimage phenomenon.

The CRT is a rendering method using the raster scan display method. That is, R for each pixel,
Receiving G and B video signals, radiating an electron beam of corresponding intensity to the pixel position on the phosphor screen and emitting light at each brightness R,
Various colors are displayed by combining the colors of the G and B fluorescent points. Further, the designation of pixels, that is, the radiation position of the beam is controlled by the horizontal synchronizing signal and the vertical synchronizing signal. That is, the electron beam is scanned in the horizontal direction from the upper left on the screen, and the required number of scanning lines are sequentially made 30 to 60 times per second to the lower right.
The numerical value of 30 to 60 times is called a vertical scanning frequency (reflecting rate), and generally, a numerical value close to the lower limit is set within a range where flicker does not occur.

The CPU analyzes and executes input information from the host computer or IM. However, the specific processing is mostly performed by each dedicated processor (MTX, CLP, VIF, etc.), and in practice, they are often controlled.

The input device (IM) is used by an operator to input various information to the graphic display device. There are various types depending on the application. There is a keyboard as standard. Devices for inputting coordinate values include digitizers and tablets. In addition, as a means for moving a figure or a cursor on the tube surface, there are a joystick, a track ball, and the like.

As described above, in the graphic display device including the host computer and the graphic display device, the drawing information is managed by the host computer. This can be considered to have a virtual large drawing that is continuous in a plane in the computer. In the conventional method, when there is a display request from the operator, the host computer sends the drawing information of the requested portion in the virtual large drawing to the cutout graphic display device. The graphic display device that has received it stores each graphic element of drawing information in SB in the form of a segment, bit-expands it in FB, and displays it on the screen. In this method, it takes a considerable time to transmit a large amount of information between the host computer and the graphic display device and to register a segment in the graphic display device, and it takes a long time from the display request to the display on the screen. As described above, the responsiveness is the maximum requirement for the drawing display device, and this method has been a problem.

Recently, a graphic display device was constructed using a graphic display device with a large-capacity (about 4 MB) SB, and at startup, the graphic information corresponding to all drawing information managed by the host computer
In the operation, when there is a display request, the host computer gives an instruction only for the display range to the graphic display device.
In the graphic display device, a method has been developed in which the graphic information in the required range is cut out from the graphic information corresponding to all the drawings in the SB, bit-developed and displayed in the FB. This is because the amount of transmission information at the time of display request is small and segment registration processing is not necessary, so that an arbitrary drawing location can be displayed at high speed. We have realized a drawing display device with extremely good responsiveness.

Now, in the drawing information processing system, from the viewpoint of usability,
It is desired to have a function of changing drawing information in a simulated manner while actually seeing it. In other words, the function is to change the drawing information while visually confirming it on the drawing display device, and restore it again. In other words, it is a drawing information change drawing simulation. For example, in a case where a local government newly plans a new road, a water supply, or a new construction or removal of public goods on a drawing. Similarly, in a power company, a telephone company, or a gas company, when a plan for new installation or removal of a power line, a telephone line, or a gas pipe is performed on a drawing. On the drawing display device, it will be shown how roads, water, public facilities, electric power lines, telephone lines, gas pipes, etc. are actually installed or removed.
When the simulation change is stopped, the original drawing information is restored and the current drawing can be displayed.

In the above function, it is naturally required that the responsiveness of the drawing change process is good, but after the simulation is further stopped, the function of returning to the original drawing information and displaying it can be required. This is because the various tasks that are carried out based on the current drawings are more practical problems.
This is because the current drawing must be able to be displayed when the need arises at any time while executing the simulation. For example, when an accident occurs in a power line under the jurisdiction of an electric power company, it is necessary to display the current drawing, grasp the accident area, and promptly perform an accident recovery operation. Similarly, if a fire occurs in the jurisdiction of the fire department,
It is necessary to display the current drawings, grasp the flame-generating area, and immediately rush to the scene to carry out fire-fighting activities. Even if there is no such urgency, the work performed based on the current drawing information is prioritized. The current drawings are also frequently used. Therefore, it is required to quickly return to the original state even during the simulation. After that,
Restoring the simulated drawing information to the original is called current restoration.

In this simulated change processing, it is problematic from the viewpoint of data protection to change the actual drawing information for the drawing information managed in the host computer. For example, it is possible that the host computer goes down during the simulated change process, and the current drawing information remains unchanged. Therefore, in the case of making a simulated change, a method may be considered in which the genuine (current) drawing information is first copied to another area in the storage device and a simulated change process is performed on the copied drawing information. During the simulated change process, no operation is performed on the real drawing information, so that the data protection is completely established. Further, in this method, when returning to the current state, it is only necessary to discard the simulated drawing information as it is, no data operation is required, and the operation can be instantly restored. Therefore, the response of the processing of the host computer is very good.

However, there is a problem in adopting the above method in a graphic display device that stores all drawing information (format of graphic information). That is, the storage area (SB) of the graphic display device for storing the drawing information is not so large, and the area for storing both the current drawing information and the simulated drawing information cannot be secured.

The memory device of the graphic display device is an IC memory, and it is technically difficult to mount an ultra-large capacity device at this stage. It also becomes expensive. On the other hand, the host computer can have a storage area practically infinite by utilizing an auxiliary storage device such as a disk or a virtual storage function.

Therefore, the host computer executes the simulated change processing on the simulated drawing information, but the graphic display device has a method of directly changing the current drawing information. In this way, when the current state is restored, the restoration process on the host computer side can be executed instantly, but the figure display device has actually changed the current drawing information, and therefore cannot be easily restored. In order to restore the drawing information in the figure display device to the current one, all the current drawing information managed by the host computer must be re-registered as in the system startup. However, this requires a long time for transmission of a large amount of information and segment registration.

By the way, in recent years, in the drawing information processing system, there has appeared a device which displays geographical information by superimposing a facility to be managed, takes in the state information of the facility online, and displays it on a drawing display device in real time. The state information may be a quantity value or a logical value. Display them at or near the location of the facility on the drawing. The display style may be the color or shape of the equipment figure, or may be directly indicated by a number near the equipment figure. When there is a change in the state of equipment,
The color is used to represent the condition by segment of equipment figure or
The color attribute of the IDB is changed to the corresponding one, and the one that expresses the state by the shape or numerical value is replaced with the corresponding segment or the IDB itself by the one corresponding to the state.

Even in the drawing information processing system as described above, a simulated change is made, and even in that case, the state information of the managed equipment is taken in online. However, the drawing information in the graphic display device has been changed by simulation, and is not the current drawing. So to speak, it is displaying future drawings, and it is strange to reflect the current state of the equipment. Therefore, the display of the online status information of the equipment is not updated during the simulated change work. Not updating the display means not operating the drawing information in the graphic display device. During the simulated change work, the latest equipment state information will be lost. However, when the mock change work is completed, it must be possible to return to the current work and quickly display the current drawing. At that time, of course, the equipment must display the latest state. Even if it is possible to actively collect facility information online from the drawing information system side when returning to the current state, the number of facilities is enormous, and because it is also performed by transmission processing, the latest state is captured and displayed. It will take a considerable amount of time to complete.

In order to solve such a problem, the present invention has already examined the following method. This is because the host computer has an equipment status table and current status change recording section for each element corresponding to each equipment, and when the status information of each equipment is fetched online, the status is compared with the contents of the equipment status table. Detects equipment that has changed and updates the equipment status table and equipment segment status for the equipment during the current operation, and updates the equipment status table and the current status change recording section for the equipment during simulated change operation "There is a state change" setting, and when the current state is restored, the current state change recording section is searched for the equipment that has undergone a state change, the current state of the equipment is retrieved from the equipment state table, and the state of only that equipment is updated. By doing so, 1/0 processing to the graphic display device is reduced as much as possible, high-speed status update,
It will realize the current restoration.

By the way, when the equipment having the status information is operated and managed, the related equipment is operated in order to newly install / change / remove the equipment. For example, if the equipment is a gas pipe, a water pipe, an electric power line, etc., the valves, switchgear, etc. that separate the relevant parts from other parts are closed to shut off gas, water, and electricity. If you operate and manage equipment with a drawing information processing system, there is a demand to simulate it on the system (computer / simulation) before planning and executing these works, and verifying the feasibility. . This is because if there are several construction subjects and their locations and dates are close to each other, it may not be possible to perform them due to duplication of operation target equipment and inconsistent operation. In order to verify this, a method of showing the simulated execution process of this construction on the drawing of the graphic display device is effective because it strongly appeals to human vision.
For example, as the construction subject, the operation procedure of the construction (new / replacement / removal) target equipment and its related equipment is registered in the system, and the construction subject scheduled to be executed by the scheduled execution date and time of the target construction subject is sequentially input to the host computer. And expand it on the database of graphic display devices.

In this way, the state of the equipment may be changed in a simulated manner during the simulated change work.

The present invention is a drawing display device capable of rapidly returning the equipment state to the current state even if the equipment state is simulated during the simulation change work by advancing the technology already studied as described above. It is intended to be provided.

D. Means for Solving the Problems FIG. 1 is a diagram showing the overall configuration of the present invention. In the host computer 1, the current drawing information storage area 3 which always stores the current drawing information and is used for actual operation, the simulation drawing information storage area 4 which is used at the time of simulation change, and the current status information of each facility taken online To store and update the current equipment state table 5, a simulated equipment state table 6 to store and update the simulated state of the equipment generated by an operation during simulated change work, and the current state of each equipment taken online The information is compared with the contents of the current equipment status table 5 to record whether or not the current status of each equipment has changed, and the simulated status of each equipment instructed during the simulated change work and the contents of the simulated equipment status table 6 are recorded. And a state change recording section 7 for recording the presence or absence of a change in the simulated state of each facility and a simulated change recording section 8 for recording a simulated change history of the simulated drawing information.

And the segment buffer (SB) 9 of the graphic display device 2
Stores the current drawing information when the host computer 1 performs the current business process, and stores the simulation drawing information when the simulation change process is performed.

E. Operation (1) Drawing information processing Here, first, stepwise description will be given regarding simulated changes of drawing information (for example, house map information) other than equipment state information (for example, switch on / off information) and current restoration.

During the current operation, the host computer 1 performs various processes using the current drawing information. The drawing information in the graphic display device 2 is also current. Therefore, the display operation is also performed on the current drawing of the host computer 1 and the graphic display device.

When starting the simulated change processing, the host computer 1 copies the current drawing information to the simulated drawing information storage area 4.

When performing the simulation change processing, the host computer 1 targets the simulation drawing information. When a drawing information change request is made, the change process is performed on the simulated drawing and the drawing in the graphic display device 2. At this time, the history information regarding the operation of changing the drawing in the graphic display device 2 is recorded in the simulated change recording unit 8.

When the host computer 1 targets the simulated drawing information for processing, the drawing information in the graphic display device 2 is also for the same simulation, so that the simulated drawing is naturally displayed.
Various display operations are also performed on the simulated drawing.

At the time of returning to the current state, referring to the simulated change recording section 8 and the current and simulated drawing information, an operation for restoring the drawing information in the graphic display device 2 from the simulated to the current one is performed.

After the current state is restored, the simulated drawing information and the recorded contents of the simulated change recording unit 8 are unnecessary and are discarded. The current drawing information is copied to the storage area of the simulated drawing information at the start of the simulation, so that no operation is required at the time of restoration.

FIG. 2 shows an example of correspondence between the drawing in the simulated display device 2 and the recorded contents of the recording unit 8.

This drawing is a residential map. The symbol of each house corresponds to one segment.

The recording unit 8 sets the change type, the segment name, and the current content to 1
It is managed as a record. The change type indicates how the change is made, and there are three types: replacement, deletion, and new installation. The replacement means that the contents of the segment, such as the shape and the position coordinates, have been changed. Deletion means that the segment itself has been deleted from the SB.
The new establishment means that a new segment has been established.
Next, the segment name in the recording unit 8 is
This is the name of the segment that has been changed, that is, replaced, deleted, or newly established. Next, the current content is the current (original) content of the change target segment. Since the segment whose change type is new does not originally exist in the current drawing, the current content of the recording unit 8 is “none”.

The current drawing is shown in. There are two houses, Seg.I and Seg.J. Naturally, there is no recorded content at this time.

The simulation was started here, and the drawing information of the graphic display device 2 was changed. The result was a drawing. First, the house of Seg.I in 1st chome moved to 3rd chome [the position coordinates of the segment changed from (X0, Y0) to (X1, Y1)] and changed to a second-floor house. The home of Seg.J, located in 2-chome, has been deleted. A new Seg.K house has been established on 4-chome. The recorded contents of the recording unit 8 are as shown in the table of the figure.

When returning to the current state, Seg.I may be replaced with the current contents stored in the recording unit 8. Since Seg.J has been deleted in the simulation, recording section 8
Reregister the current contents saved in to the segment. Seg.K has been newly registered as a simulation, so you can delete it. By this operation, the drawing information in the graphic display device 2 is returned to.

Further, as a method of changing the drawing information other than the equipment state information and restoring the current state, a saving method which is a step ahead of the method already described may be used. In this save method, the current drawing of the graphic information segment changed at the time of simulated change is saved in SB9 with a name different from the segment name given in the drawing information storage area in SB9. To provide a save area. When the graphic information segment stored in the save area is called a save segment, the visible attribute of the save segment is invisible. This is because the evacuation segment exists in the same SB as the drawing information segment, and the contents of the evacuation segment are the contents of the segments that make up the drawing (positions such as symbols in the drawing). It becomes the target of cutting out. That is, the saved segment, which is the current drawing content, is also displayed during the simulation change process. Since this does not result in a simulated change, the visible attribute of the saved segment is made invisible. A segment whose visible attribute is invisible is not subject to bit expansion in FB.

Then, at the time of the simulated change, the change history is recorded in the simulated change recording unit 8, the current contents to be changed are given a different name and copied to the save area in the graphic display device 2, and when the current state is restored, the recording of the recording unit 8 is performed. By referring to the contents, the restoration target in the save area is restored to the original name, and the restoration target graphic information unit in the drawing information storage area in the graphic display device 2 is deleted. According to such a method, even if there are many graphic information units to be restored, there is an advantage that the transmission processing to the graphic display device and the segment operation in the graphic display device are remarkably small.

(2) Facility state information processing Next, regarding the facility state, the process at the time of receiving the facility state information, the process at the time of returning to the current state, and the process at the time of simulated change work are described. Each of the elements of the current equipment state table 5 and each element of the simulated equipment state table 6 are included in the managed equipment 1:
Corresponding to 1, the former stores the current state of each facility, and the latter stores the simulated state of each facility associated with the simulated operation. Each element of the state change recording unit 7 also corresponds to the equipment to be managed in a 1: 1 manner, and the content thereof indicates whether or not the current state or the simulated state of the equipment has changed during the simulated change operation work. For example, when the current state of a certain target equipment changes, the content of the state change recording unit 7 relating to the equipment becomes “changed”, and even when the simulated state changes due to the simulation operation, it becomes “changed”.

a. Processing at the time of receiving online information about equipment status First, the current equipment status information taken online is compared with the contents of the current equipment status table 5, and equipment with status change (hereinafter referred to as status change) is detected. .

If the current work is in progress, the contents of the current equipment status table 5 and the status expression mode of the segment corresponding to the equipment (eg, display color, shape. Simply called state).

If the simulated change operation is in progress, the contents of the current equipment state table 5 for the state change equipment are updated, and the state of the equipment in the state change recording unit 7 is set to “state change”.

b. Facility state information processing in simulated change operation The simulated change operation is performed based on the drawing information (simulated drawing information) obtained by copying the current drawing information into the simulated drawing information storage area 4. When the change occurs in a simulated manner, the content of the simulated equipment state table 6 and the state expression pattern of the segment corresponding to the equipment are updated for the equipment. It is assumed that the state change recording unit 7 is initialized (“No state change” is set for all equipment) at the start of the simulated change operation work. The timing of initialization is not specified.

c. Current restoration process First, restore the original (current contents) of the equipment segment changed by the simulated change operation. How to return is as described above.

Next, the state change recording unit 7 detects the state change equipment (the content of which is “state change”), retrieves the state of the facility by referring to the current facility state table 5, and determines the state of the segment corresponding to the facility. Update.

F. Examples Next, equipment state information processing will be described with reference to FIGS. However, since the simulation change itself has already been described, it will be omitted. A drawing segment is shown inside the graphic display device 2 on the right side of the drawing. The equipment name corresponding to one element of each data set is indicated by an alphabet.
The equipment status value is ON / OFF, and red / is used to express the status.
The display is in green color.

a. Simulated equipment status information processing Figure 3 shows the processing when developing simulated equipment status information.

There is a simulated state change in the equipment I, and the simulated equipment state table 6 and the equipment segment Seg.i are updated in the simulated state, and the state change recording unit 7 sets the relevant equipment as "state change".

b. Current equipment status processing Figure 4 shows the current equipment status processing during simulated change work.

Upon receiving the online facility state information, there is a state change in the facility H, the current facility state table 5 is updated, and the state change recording unit 7 sets the relevant state as “state change”.

c. Current return processing Figure 5 shows the processing when there is a current return request. However, it is assumed that the returning operation of the segment changed by the simulated change has been completed.

The state change recording units 7 detect the state change equipments H and I, refer to the current equipment state table 5, and refer to the corresponding equipment segment Seg.h, Se.
Update the status of gi.

In the above, in the above example, the current equipment state table 5
Each element of the simulated equipment state table 6 and the state change recording unit 7 and the segment in the segment buffer 9 are made to correspond to each other. However, this correspondence is not limited to the segment unit but to the IDB unit. You can
It may be a graphic information unit larger than a segment.

G. Effects of the Invention As described above, the present invention has the following effects.

(1) When the simulated drawing information in the graphic display device is returned to the current contents, the simulation change history is recorded instead of registering all the current drawing information managed by the host computer as a segment as in the past. Since only the operation for returning only the simulated drawing information to the current contents is performed with reference to the change recording unit, the current status can be restored in a short time.

(2) The state change equipment is detected when the state information is taken online, and only the state change equipment is used to update the state of the equipment segment at the time of the current work, and time-consuming 1/0 processing to the graphic display device is performed. Since the number is minimized, the facility status update process can be performed at high speed.

(3) A current equipment status table is provided, which can be updated when the status information is imported and the latest status can be saved at all times, so there is no need to import status information online when returning to the current status, and the status can be quickly restored. Is possible.

(4) By providing a state change recording unit to record only the equipment that has undergone a current state change or a simulated state change during the simulated change operation work, the equipment segment to be restored to the current state is required. Only for the products, the time-consuming 1/0 processing to the graphic display device is reduced as much as possible to enable a fast current return.

(5) The state change recording section associates each element (or bit) with each equipment and expresses the content as “with state change” / “without state change” and is shared by the current state change and the simulated state change. As a result, even if a mock state or a current state change occurs in the same equipment multiple times during the simulated change work, the record of the state change is not duplicated and is one for that equipment. Only the process of reflecting the current state (state update) is required. Therefore, the time-consuming 1/0 processing to the graphic display device can be minimized, and the current state can be returned at high speed.

(6) For example, if the simulated change recording unit indicated by 8 in FIG. 1 is intended to handle even a simulated change, the change of state of the change equipment of the change equipment is searched when it is registered in the recording unit. Since the number of facilities is large, processing time is required. Further, since the current equipment state table is used during the current restoration process, the contents of the current drawing stored in this recording unit are unnecessary and the storage area is not effectively used.

On the other hand, in the present invention, since each element of the state change recording unit corresponds to the equipment in a 1: 1 relationship, it is possible to directly refer to / record the state change equipment and realize high-speed processing. Further, since the content of the state change recording section is only “with / without state change” and does not have extra information, the storage area can be used efficiently.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an overall configuration of an embodiment of the present invention, and FIG.
The figure is a correspondence diagram showing the correspondence between the drawing information and the contents of the simulated change recording unit, and FIGS. 3 to 5 are explanatory diagrams showing simulated equipment state processing, current equipment state processing and current restoration processing, respectively. Is a block diagram showing the overall structure of the graphic display device, FIG. 7 is an explanatory diagram showing how graphics are superimposed, and FIG. 8 is a block diagram showing the mechanism of video signal generation. 1 ... Host computer, 2 ... Graphic display device, 3 ... Current drawing information storage area, 4 ... Simulated drawing information storage area, 5
…… Current equipment status table, 6 …… Simulation equipment status table, 7 …… State change recording section, 8 …… Simulation change recording section, 9
...... Segment buffer.

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Claims (1)

[Claims] 1. Drawing information in which a facility to be managed is superimposed on a map is registered in a segment buffer of a graphic display device, and graphic information in a display range designated by a host computer is stored in the segment buffer. While cutting out from the drawing information and displaying it on the screen, the host computer fetches the status information of each facility online and displays it on the graphic display device in real time, and during the simulation change work, the simulation drawing information storage area in the host computer In the drawing display device that copies the current drawing information as simulated drawing information to the simulated drawing information and performs the simulated change processing based on the copied drawing information, the current status information of each facility taken online is stored and updated. Equipment status table and simulated equipment status table that stores and updates the simulated status of equipment generated by operations during simulated change work , Comparing the status information of each equipment taken in online and the contents of the current equipment status table to record the presence or absence of a change in the current status of each equipment, and the simulated status of each equipment instructed during the simulated change work and A state change recording unit that records the presence or absence of a change in the simulated state of each facility by comparing the contents of the simulated facility state table,
The host computer is provided with a simulated change recording unit for recording a simulated change history of the simulated drawing information other than the facility state, and at the time of the simulated change, the contents of the current facility state table are updated based on the fetched current facility state information. At the same time, the contents of the simulated equipment state table are updated based on the simulated state generated by the simulated operation, and the state change record of the corresponding equipment in the state change recording unit is set to have a state change. With reference to the recorded contents of the simulated change recording unit, only the drawing information in the simulated display device is returned to the current drawing information, and the facility that has undergone the state change is searched based on the state change recording unit. Grasping the current status of the equipment from the current equipment status table, and updating the status of the graphic information unit related to the equipment in the segment buffer based on it Drawing display device, which comprises carrying out.