JPS62247468A - Drawing display device - Google Patents

Abstract

PURPOSE:To reflect state information on facilities on a graphic display device in a quick, rational and assured way in case said state information is received in on-line while the drawing information is registered in a rise mode of the graphic display device, by replacing the state of the corresponding facilities after registration for each graphic information in a segment buffer. CONSTITUTION:When registration is through with the drawing information, the display of a flag 6 is replaced with 'registration done'. Then the facilities H and J that had state changes during registration are extracted out of a state change recording part 4. The states of the corresponding segments Seg. h and Seg. j of a segment buffer 7 are replaced in response to the states of said facilities H and J and with reference to a facilities state table 3. When these state replacements are through, the elements corresponding to the facilities H and J are defined as 'no (state change)'. Thus the state of the facilities J is changed to an OFF state from an ON state after the segment state is replaced. In such a case, the corresponding element of the table 3 is replaced and at the same time the state of the segment Seg. j of the buffer 7 is replaced.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to a drawing display device that displays drawing information managed by a host computer on a graphic display device serving as a terminal in response to an operator's request. be.

B0 Summary of the Invention The present invention provides a device in which a host computer takes in status information of each piece of equipment online and displays it on a graphic display device in real time, and when drawing information is registered in the graphic display device, the information is read based on the online information. The presence or absence of a change in the status of each piece of equipment and the status of the equipment are recorded in the host computer, and after registration is completed, the status of the equipment whose status has changed is updated to the graphic display device based on the recorded contents of the host computer. This makes it possible to quickly start up the graphic display device without missing the equipment status that is captured online from the stopped state to the completion of startup.

C1 Problems with the Prior Art Maps can represent information on various human activities such as local natural conditions, population facilities, and population and economic conditions, and have been used for administrative purposes since ancient times. It is still a country.

Local governments, fire departments, etc. use it extensively as information that forms the basis of regional planning and regional management. In addition, public companies such as electricity, telephone, and gas companies use drawings depicting their facilities on maps to plan and manage their own facilities (power lines, telephone lines, gas pipes) installed in the region. . These maps and facility diagrams are drawn as figures on paper, and the information drawn is referred to as drawing information in this specification.

In recent years, attempts have been made to draw these drawings using computers and to process drawing information using computers.

The United States was a pioneer in this, and it has been practiced since the 1960s. Such a computer system is called a drawing information processing system. Currently, it is used by federal, state, and local governments, as well as public companies such as electricity, telephone, and gas companies, and private companies such as marketing companies.

Although Japan started research later than the United States, it has successfully absorbed the developments in technology during that time, such as databases and computer graphics, and is now showing its own development. Now, national and local governments.

In public enterprises such as fire departments, electric, telephone, and pruning,
It can be said that we have finally reached the practical stage.

A feature of the above-mentioned drawing information processing systems is that they can all be connected to a graphic display device to display drawings. The host computer manages the drawing information and controls the graphic display device to display the requested portion of the drawing according to the operator's request. The graphic display device displays the requested portion of the drawing in response to a request from the host computer. In a drawing information processing system, the part that implements the function of displaying drawings using a post computer and a graphic display device is called a drawing display device.

The basic usage of a drawing information processing system is to proceed with processing through interactive operations with an operator, centering on drawings displayed on a graphic display device.

Therefore, a high responsiveness of the drawing display function is strongly required. However, since the host computer performs various general-purpose tasks in addition to drawing display processing, the steady load is heavy, and no performance improvement effect on the host computer can 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 display processing, there is a tendency for graphics display devices to become more intelligent. In other words, the graphic display device performs most of the graphic display functions. The graphic display device having the configuration shown in FIG. 6 will be described in detail below.

First, the graphic display device has a post interface (H11?) for sending and receiving data to and from the host computer. IIIF receives various display instructions and graphic information from the host computer and transmits them to the display processor (CI'U). Further, in response to a request from the host computer, it receives fS type display related information from the CPU and transmits it to the host computer.

Segment buffer (SB) is a descriptive representation (numeric value).

This is a memory that stores graphic information (symbols). The graphic information is managed in a hierarchical structure. The bottom layer is.

It is a concrete figure entity (display figure shape 9 position coordinates 1 display color, etc.). This is what is called an IDB. These several IDBs are collected to form a segment. The segment has various attribute information (visible attribute, detected attribute, etc.). The IDB and segments have names, and various operations can be performed by specifying the names. Note that the positional coordinates of the graphic entity do not directly indicate the pixel position on the screen, but are coordinates on a virtual large screen, so-called world coordinates.

From the graphic information stored in this SB, graphic information in a range (a rectangular area determined by world coordinate values) required to be displayed is cut out.

For this cutting process, a matrix calculator (MTX) that performs parallel translation and rotational transformation of the displayed figure, a clipping 5 (CLP) that removes the part that extends beyond the displayable area corresponding to the CRT monitor (CRT), etc. are prepared. ing. Furthermore, the line segment of the graphical information of the cut out descriptive expression is extracted from the corresponding frame buffer (
A digital differential analyzer (DDΔ) is used to expand the bits on 0N10FF information (FB).

A frame buffer (FB) is a memory having bits corresponding to each pixel on the screen of a CRT in an 1 to 1 ratio, at least to the extent corresponding to the number of pixels on the screen. In color display, a plurality of memory planes are provided, and column data in which a set of bits corresponding to the same pixel are arranged in each plane is used as the color code of the pixel corresponding to the bit.

Furthermore, in recent years, there is a lookup table (LT), also known as a color map, in which color codes are stored in advance.
Graphic display devices that read out the contents of the corresponding address and use it as a color code for the corresponding pixel have become mainstream.

In such a graphic display device, overlapping priority display is possible. That is, first, a priority order is determined for each plane of the FB, and similarly, a priority order indicating which of the figures to be displayed is prioritized and displayed when they are superimposed is determined. Next, for each LT address, store the display color code of the figure to be expanded to the highest priority brain among the combinations of brains corresponding to the bit whose bit content is turned on in the LT part of the address. . Then, the graphics in the display range are cut out from the SB, and each graphic is bit-developed into the FB plane corresponding to its priority order. On the other hand, when several figures in each brane overlap, the LT is referred to using the bit string corresponding to the pixels in the overlapped part as an address, but the address part contains the plane figure corresponding to the "on" bit of the address. Since the color code of the highest priority display figure when sets overlap is stored in advance, overlapping priority display is realized. This will be explained in FIG. Display figure.

There are 3, 3 and 4, and the order of priority for superimposition priority display is from highest to highest. The display color is red.

Green and blue. The priority order of the FB brains is P2. The order is I'l, PO. Display figure・mu.

■ is P2. Assume that the bits are expanded into Pl and PG. The set of bits corresponding to one pixel read out from each plane of FI3 is P2゜Pi from the highest order.
, are arranged in the order of PO, and are the reference address of LT. The combinations of overlapping figures in each pixel, the corresponding LT reference addresses, and the LT contents of the addresses are shown below. (The part where the bit content of the address is x indicates that either O/1 is acceptable.) Figure type or combination><LT reference address>
<LT contents> 1, ・, mu, ■ l×× red 2, ・, mu Same as above
Same as above 3. Same as above
Same as above 4, Mu, l OIX Green 5, Mu Same as above
Same as above 6, ■ 001 Blue 7, No overlap 000 Background color Also, figure types and combinations are shown in the figure. The numbers written on the surface surrounded by line segments are the numbers assigned to the above graphic types or combinations. The screen displayed on the screen as described above is as shown in the figure.

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

The video interface (VIF) reads out the contents of the FB, uses the bit string corresponding to each pixel as an address, reads out the color code of the LT, and sends the video signal (R, G, B, separate) to the CrtT.

composite) and synchronization signals to the CRT (vertical synchronization signal: VD, horizontal synchronization signal: I-I
D). These actions are
It is independent of CPU control and always executes at high speed and cyclically. The mechanism up to video signal generation will be explained using FIG. 8. VIF is the bit address (FBAD) corresponding to a certain pixel for each plane of FI3.
) occurs. The bit contents thus read out are arranged in respective predetermined positions to create an LT reference address. The corresponding LT by this LT reference address
Read out the contents in R, G, and B units. The read contents are sent to the DA converter. Here, D-A conversion is performed, and each R
, G, B video signals are generated. The above processing is performed one after another in the order in which the pixels are arranged.

These processes are executed extremely fast and cyclically, so to the human eye, the image appears as a single screen, aided by the afterimage phenomenon.

The CRT performs refresh drawing using a rask scan display method. That is, upon receiving the IN, G, and B video signals for each pixel, an electron beam of the corresponding intensity is emitted to the pixel position of the phosphor screen, and the color of the R, G, and B fluorescent points emitted at each luminance is determined. Various colors are displayed by compositing. Further, pixel designation 4', that is, the beam radiation position, is controlled by a horizontal synchronization signal and a vertical synchronization signal. In other words, the electron beam is scanned horizontally from the left side of the screen, and the required number of scanning lines are sequentially scanned from 30 to 30 per second to the bottom right.
Make it 60 times. The value of 30 to 60 times is called a vertical scanning frequency (refresh rate), and is generally set to a value close to the lower limit within a range that does not cause flickering.

The CPU analyzes and executes input information from the host computer and IM. However, most of the specific processing is carried out by dedicated processors (MTX, CLP, VIF, etc.), and in fact, they are often controlled.

The input device (IM) is used by an operator to input various information to the graphic display device. There are many different types available depending on the purpose. A keyboard is standard. Devices for inputting coordinate values include digitizers, tablets, and the like.

Furthermore, there are joysticks, trackballs, etc. for moving figures and cursors on the screen.

As described above, in the drawing display device composed of the host computer and the graphic display device, the drawing information is managed by the host computer. This can be thought of as having a large continuous virtual drawing within the computer. In the conventional method, when there is a display request from an operator, the host computer transmits drawing information of the requested location in the virtual hole drawing to the cutout figure display device. The graphic display device that receives it stores each graphical element of the drawing information in the form of a segment in the SB, expands it into bits in the FB, and displays it on the screen. In this method, it takes a considerable amount of time to transmit the large m information between the host computer and the graphics display device and to register the segments in the graphics display device, and it takes a long time from the display request to the display on the screen. . As mentioned above, the highest requirement for drawing display devices is good responsiveness.
There was a problem with this method.

Recently, I configured a drawing display device using a graphic display device with a SB of large fi (approximately 4 NIB), and at startup, I registered all the graphic information corresponding to all the drawing information managed by the host computer in the SB. During operation, when there is a display request, the host computer gives instructions only for the display range to the graphic display device, and the graphic display device cuts out the graphic information in the requested range from the graphic information corresponding to all drawings in the SB and sends the bits to the FB. A method of expanding and displaying has been developed. In this case, the amount of information to be transmitted at the time of a display request is small, and there is no need for segment registration processing, so any drawing location can be displayed at high speed. A drawing display device with extremely good responsiveness has been realized.

Now, in recent years, there has been a demand for drawing information processing systems that display equipment to be managed superimposed on geographic information, capture status information of the equipment online, and display it on a drawing display device in real time. Status information may be a quantitative value or a logical value. Display them at or near the relevant equipment location on the drawing. The display style may be the color or shape of the equipment graphic, or it may be expressed directly in numbers near the equipment graphic. If the condition of the equipment changes,
Segment or I of the equipment figure to express the status with color
Change the color attribute of DL3 to the corresponding one, and use the corresponding segment or IDIE to express the status by shape or numerical value.
Perform operations such as replacing itself with something corresponding to the state. (Hereinafter, this operation will be simply referred to as status update.) D6 Problem to be solved by the invention In the drawing information processing system as described above, the graphic display device may stop several times after starting operation. be. For example, it may be stopped due to maintenance/inspection or failure of the graphic display device. Even in this case, the status information of the managed equipment is available online. If the host computer constantly manages the equipment status and updates the managed equipment status when the equipment status increases online, the equipment status can be maintained even if the graphic display device is stopped. There are no problems in terms of state management.

When the graphic display device is started up after being stopped, the equipment status managed by the system at that time is referred to, and equipment graphic information that reflects the status is registered. However, it takes a considerable amount of time to register all the graphic information.

With a general drawing display device, it takes several minutes to ten minutes.

After registering a certain equipment shape to reflect its latest status, it is quite possible that status information about the equipment will be uploaded online during the subsequent registration process. At this time, it is sufficient to update the status of the host computer and the graphic display device for the equipment whose status has changed, but there are the following problems with updating the status of the graphic display device during the registration process.

If there is a change in the status of the Aro equipment figure before it is registered, it is sufficient to update only the equipment status managed by the host computer. If the status of the equipment not registered in the graphic display device is updated, it will become invalid or an error will occur. Furthermore, if there is a change in status after registration of a certain equipment graphic, it is necessary to update the status of both the host computer and the graphic display device as described above. However, if a certain equipment figure has been registered during figure information registration and the status of this equipment figure is updated to the figure display device, an error will occur if the equipment figure whose status has changed has not yet been registered. Therefore, the equipment figure must be registered in advance. In order to do this,
It is necessary to accurately grasp the timing of the end of registration of each equipment figure, that is, to accurately grasp the registration processing status, but this will complicate the process.

Furthermore, since the graphic information registration process is the core process for starting up the graphic display device, it must be performed quickly, and access to the graphic display device by other processes is often prevented. For example, the registered program may be given the highest priority, or the registered program may have access to the graphics display device.

As described above, the update of the equipment status during the registration of drawing information in the graphic display device actually has a conical correspondence. Therefore, a method of updating the status of all equipment figures after registration may be considered, but this usually takes a considerable amount of time since there are a large number of equipment.

The present invention has been made based on the above circumstances, and its purpose is to provide a system that, when equipment status information is received online during drawing information registration processing at the time of starting up a graphic display device,
It is an object of the present invention to provide a drawing display device that can quickly, rationally and reliably reflect the above information on the graphic display device.

Means to solve the E1 problem FIG. 1 is an explanatory diagram showing the overall configuration of the present invention.

The host computer 1 includes a drawing information storage area 2 that is used for actual operations and stores drawing information in which managed equipment is superimposed on a map, and equipment that stores and updates status information of each equipment that is imported online. a status recording unit 4 for comparing the status table 3 with the status information of each piece of equipment imported online and the previous contents of the equipment status table 3 and recording the presence or absence of a change in the status of each piece of equipment; and a graphical display. A flag 6 is provided as a registration status recognition unit that recognizes whether the registration status of drawing information with respect to the device 5 is unregistered, registered, or registered. The graphic display device 5 is also provided with a segment buffer 7 for storing drawing information. 8 is a communication line.

Each element of the equipment status table 3 is
It stores the status of each facility. For each element of the state change recording unit 4, l=
1, and the recorded content is ``with a change in status'' or ``no change in status.''

F1 effect (1) Processing when not registered When the graphic display device 5 is stopped due to maintenance or inspection, and the drawing information in the drawing information storage area 2 of the host computer l is not registered in the segment buffer 7, flag 6 is set.
recognizes this state and displays "unregistered". Even at this time, the host computer 1 takes in the status information of each piece of equipment online and constantly updates the equipment status of the drawing information in the drawing information storage area 2 based on the online information. The host computer 1 then refers to the flag 6 and performs processing according to the registration status. If the display of flag 6 is "unregistered", the equipment status table 3 is displayed for the equipment whose status has changed.
, and no processing is performed on the state change recording section 4. Note that the flag 6 is in the "unregistered" state from when the graphic display device 5 stops until it starts up and starts registration.
I recognize that.

(2) Processing during registration The maintenance and inspection of the graphic display device 5 is completed, the graphic display device 5 is started up, and the drawing information in the drawing information storage area 2 of the post computer 1 is registered in the segment buffer 7. Sometimes, flag 6 recognizes this state and displays "registering". In this case, the host computer 1 updates the contents of the equipment status table 3 for the equipment whose status has changed, and sets the recorded content of the equipment in the status change recording unit 4 as "with a status change". It is assumed that the state change recording unit 4 is initialized (“no state change” is set for all equipment) at the time of starting the registration process. There is no particular regulation regarding the timing of initialization.

(3) Processing after registration is completed When the registration process of the graphic display device 5 is completed, the flag 6 recognizes this and displays "Registered". In this case, the post computer 1 searches the status change recording unit 4 for the equipment whose status has changed, grasps the current status of the equipment from the equipment status table 3, and based on this, updates the segment buffer 7 related to the equipment. Updates the segment status.

After the update of the equipment whose status has changed in this manner is completed, if there is a status change of a certain piece of equipment, the status of the contents of the equipment status table 3 and the segments of the segment buffer 7 are updated.

In the above example, the equipment status table 3'&
Although each element of the state change recording unit 4 and the segment in the segment buffer 7 are associated with each other, this correspondence is not limited to each segment, and the IDB
It may be a unit or a graphic information unit larger than a segment.

G. Embodiment With reference to FIGS. 2 to 5, an example of how to deal with the registration status of drawing information, online information, recorded contents of the equipment status table 3, etc., and the status of segments will be described. Figure 2,
Online information is shown on the left side of FIGS. 3 and 5. One element of each data set indicates the corresponding equipment name in alphabetical letters. The equipment status value is 0IOFF, and the status is expressed using red/green colors.

Now, if the status of equipment H changes from OFF to ON before the drawing information is registered, the corresponding element in equipment status table 3 changes from OFF to ON as shown in Figure 2.
will be updated. At this time, flag 6 is displayed as "unregistered"
It is.

Next, when the registration of drawing information is started, the display of the flag 6 will be updated to "Registering" as shown in FIG. 3 above.

During this registration, the status of equipment H and J changes from ON to O, respectively.
When the switch changes from OFF to ON at FF, the corresponding element in the equipment status table 3 is updated, and "(status change) exists" is recorded for the corresponding element in the status change recording unit 4.

When the registration of the drawing information is completed, the display of the flag 6 is updated to "registered" as shown in FIG. 4. Then, from the status change recording unit 4, the equipment I-1, J whose status changed during registration
Take out the equipment H and refer to equipment status table 3.
, J, the corresponding segment Seg h of the segment buffer 7.

Update the status of Seg j. After this state update, the equipment 11 of the state change recording section 4. Let the element corresponding to J be "(state change) no 5".

After the segment status update is completed in this way, if the status of equipment J changes from ON to OFF, the corresponding element in equipment status table 3 is updated, and the status of segment Seg j in segment buffer 7 is updated. .

H. Effects of the Invention As described above, the present invention records equipment whose status has changed during registration of drawing information to a graphic display device, and after registration, displays graphic information units, such as segments, in the segment buffer for the equipment. If there is a change in status after registration, the status of the equipment graphic is updated in units of graphic information.

Therefore, since the processing target is limited to equipment whose state has changed, the time-consuming 110 operations can be postponed to the minimum necessary. Further, the process is simple because there is no need to grasp the timing of the end of registration of each equipment figure during registration.

Furthermore, an equipment status table is provided, which is updated when status information is imported, and the latest status can be saved at all times, so there is no chance of missing the online status that is updated from when the graphic display device is stopped to when it is started up. do not have. Therefore, after registering graphic information in the graphic display device, there is no need to import status information online again, and the graphic display device can be started up quickly.

In addition, the status change recording unit allows each element of the table to correspond to each piece of equipment, and expresses the contents as ``with a status change''/``no status change''. Even if it occurs twice, there is only one record for the equipment without duplication, and when the graphic information registration is finished, it is only necessary to perform the process of reflecting the current state (status update) for the equipment only once. Therefore, from this point of view as well, the time-consuming I10 processing for the graphic display device can be minimized.

As described above, according to the present invention, a graphic display device can be started up at high speed.

[Brief explanation of drawings]

Figure 1 is a configuration diagram showing the overall configuration of the present invention, Figures 2 to 5
The figures are explanatory diagrams showing the processing status at each stage from when drawing information is not registered to after it is registered, Fig. 6 is a block diagram showing the overall configuration of the graphic display device, and Fig. 7 is a state of graphic superimposition. FIG. 8 is a block diagram showing the mechanism of video signal generation. l...Host computer, 2...Drawing information storage area, 3
...Equipment status table, 4...Status change recording section, 5
. . . Graphic display device, 6. Flag, 7. Segment buffer. Figure 1: Reciting all columns ■ 1 view 1 host total S 2 figure f 11 Ryogin's drinking °C withdrawal J Figure 3 figure 襦 slim climbing gin 0 animal sentry map H Figure 4

Claims (1)

[Claims] Drawing information in which equipment to be managed is superimposed on a map is registered in a segment buffer of a graphic display device, and graphic information of a display range instructed by a host computer is displayed in the drawing in the segment buffer. In addition to cutting out the information and displaying it on the screen, the host computer also stores the status information of each piece of equipment captured online in the drawing display device that captures the status information of each piece of equipment online and displays it on the graphic display device in real time. a status change recording unit for comparing the equipment status table to be updated with the status information of each piece of equipment imported online and the contents of the equipment status table to record whether there is a change in the status of each piece of equipment; and the graphic display device. The host computer is equipped with a registration status recognition unit that recognizes whether the registration status of the drawing information is unregistered, registered, or registered. The contents of the equipment status table are updated based on the information, and at the time of recognition during registration, the contents of the equipment status table are updated based on the imported equipment status information, and the status change of the corresponding equipment is recorded in the status change recording section. When the record is set to have a state change and the registered state is recognized, the equipment whose state has changed is searched based on the state change recording section, the current state of the equipment is grasped from the equipment state table, and the segment buffer is stored based on the current state of the equipment. 1. A drawing display device that updates the status of graphical information units related to equipment therein.