JPS62271181A - Drawing display device - Google Patents

Abstract

PURPOSE:To prevent state updating leakage during system changeover by recording a device having a state change generated during the graphic display device changeover between system through the provision of a state change recording section and updating the sate as to segment of the device whose state is changed after the graphic display device is connected. CONSTITUTION:The information of device state and the content of device state tables 3A,3B fetched in on-line are compared by host computers 1A,1B and the device having a state change is detected and as to the device having state change, the content of the device state tables 3A,3B is updated. The host computer 1A being a main system updates the state expression form of a segment in a segment buffer 6 corresponding to the state change device, e.g., a display color or shape is updated. In disconnecting the host computer 1A from the device 5, the other host computer 1B being a new main system updates the content of the device state table 3B as to the device having state change until the computer 1B is connected to the device 5 and gives 'presence of state change' to the content of a state change recording section 4B.

Description

[Detailed Description of the Invention] 3. Detailed Description of the Invention A. Industrial Application Field The present invention provides drawing information in which equipment to be managed is superimposed on a map to a graphic display device based on a request from a host computer. The present invention relates to a drawing display device for displaying drawings.

B1 Summary of the Invention A drawing in which a host computer takes in status information of each facility online and displays it on a graphic display device in real time, and the graphic display device is switched and connected between a main series host computer and a slave series host computer. In the display device, a table for storing and updating status information of each piece of equipment imported online and a recording section for recording changes in status of each piece of equipment are installed in the main and slave S++ host computers, and switching between the host computer lines is possible. By updating, for example, a segment of the graphic display device using these contents, online equipment status information received when switching between host computer series of the graphic display device is attempted to be quickly and reliably reflected in the graphic display device. It is something.

C. Prior Art Maps can express information on various human activities such as local natural conditions, population facilities, and even 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 2015, attempts were 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 corporations such as fire departments, electricity, telephone, gas, etc.
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 post computer. In a drawing information processing system, the part that implements the function of displaying drawings using a host computer and a graphic display device will hereinafter be referred to as 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. Hereinafter, the graphic display device shown in FIG. 5 will be explained in detail.

First, the graphic display device has a host interface (HIF) for transmitting and receiving data to and from a host computer. The HIF 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, various display related information is
It is received from the PU and sent 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 lowest layer is a concrete graphic entity (display graphic shape, position coordinates, display color, etc.). This is what is called an IDB. These several IDBs are collected to form a segment. The segment includes
There is information on various attributes (visible attributes, detected attributes, etc.). ID
Both segments B and Segment have names, and various operations can be performed by specifying the names. In addition, the position coordinates of the graphic entity are
It does not directly indicate the pixel position on the screen, but rather the 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.

This cutting process requires a matrix calculator (MTX) that performs parallel translation and rotation transformation of the displayed figure, a CRT monitor (
A clipping device (CLP) or the like is widely used to remove portions that extend beyond the displayable area of the CRT.

Furthermore, the line segment of the graphical information of the cut out descriptive expression is determined from the corresponding frame buffer (F
B) A digital differential analyzer (DDA) is prepared which expands the above bits into 0N10FF information.

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 a color display, a plurality of memory planes are provided, and a set of bits corresponding to the same pixel in each plane are arranged to form column data, which is called the color code of the pixel corresponding to the bit. Furthermore, in recent years, look-up tables (LT), also known as color maps, have been developed to store color codes in advance.
Graphic display devices that use the bit column data as an address, read out the contents of the address in the LT, 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 developed in the plane with the highest priority among the combinations of planes 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 SR, and each graphic is bit-developed into the F'B plane corresponding to its priority. On the other hand, when several figures in each plane overlap, the LT is referenced 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 is a system, -, and the order of priority for overlapping priority display is from highest to lowest. The display color is red.

Green and blue. The priority order of the FB planes is Pl, Pl, Po from highest to lowest. Display figure・mu.

The cabinet shall expand bits to Pl, PI, and PO, respectively. A set of bits corresponding to one pixel read out from each plane of FB is Pl from high order.

Suppose that the addresses are arranged in the order of pt and 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 × indicates that it can be either 0 or 1.) <Graphic type or combination><LT reference address>
<LT contents> l,..., mu, ■ IXX red 2,..., mu Same as above
Same as above 3. Same as above
Same as above 4, Mu, -01 x green 5, Mu Same as above
Same as above 6, ■ oot blue 7, no overlap 000
The background color also indicates the shape type or combination in the diagram. 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 B. R stored at each address,
A unique 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 LT color code, and sends the video signal (R, G, B, separate) to the CR'r.

Composite) and synchronization signals to the CRT (vertical synchronization signal: V D , horizontal synchronization signal HD
). These operations are performed by the CPU
It is independent from the control of the system and always runs rapidly and cyclically. The mechanism up to video signal generation will be explained using FIG. VIF generates a bit address (FBAD) corresponding to a certain pixel for each plane of PI3. The bit contents thus read out are arranged in respective predetermined positions to create an LT reference address. Using this LT reference address, the contents of the corresponding LT are read out in R, G, and B units. D-
Send to A converter. Here, D-A conversion is performed, and R, G,
Generates a B video signal. 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 R, 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 H fluorescent points that emit light at each brightness is determined. Various colors are displayed by compositing. Furthermore, the designation of pixels, that is, the radiation position of the beam, is controlled by a horizontal synchronization signal and a vertical synchronization signal. That is, the electron beam is scanned horizontally from the upper left of the screen, and the required number of scanning lines are sequentially created from 30 to 60 times per second to the lower right. The value of 30 to 60 times is called the vertical scanning frequency (refresh rate), and is generally
A value close to the lower limit is set 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 performed by each dedicated processor (MTx, CLP, VIF, etc.), and in reality, these are often controlled.

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

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 the information stores each graphical element of the drawing information in the form of a segment in the SH, 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 a large amount of information between the host computer and the graphic display device and to register segments within the graphic 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, a graphic display device with a large capacity (about 4MB) SB has been used to configure a drawing display device, and at startup,
All figure information corresponding to all the drawing information managed by the host computer is registered in the SB, and during operation, when there is a display request, the host computer gives instructions only for the display range to the figure display device, and the figure display device displays the information in the SB. A method has been developed in which graphic information in a required range is extracted from graphic information corresponding to all drawings, bit-expanded and displayed on an FB. Since the amount of information to be transmitted at the time of a display request is small and segment registration processing is not necessary, any drawing location can be displayed at high speed. A drawing display device with extremely good responsiveness has been realized.

Now, in recent years, drawing information processing systems have appeared 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. When the system receives status information and there is a change in the status of the equipment, those that express the status with colors change the color attributes of the equipment graphic segments or IDB to the corresponding ones, and those that express the status with shapes or numbers change the color attribute of the equipment graphic segment or IDB to the corresponding one. Operations such as replacing the corresponding segment or IDB itself with one corresponding to the state are performed.

Some drawing information processing systems as described above employ a duplex configuration of host computers to ensure reliability. That is, a plurality of host computers are operated, one of which performs business operations, and the other systems are placed on standby. The moesha is called the main line (main line), and the latter is called the subordinate line (subline).

(The operating modes of such computers are also referred to as "main mode" and "slave mode.") The I10 device connected to the system is used for business purposes, and 1. Always connected to the main sequence. When the main series goes down, the subordinate series automatically starts up as the new main series. It is also possible to manually switch between master and slave for maintenance and inspection of the main train. (After the master-slave system is switched, the old master system, that is, the new slave system, is stopped and work is performed on it.) At this time, the connection of the device 110 is automatically switched to the newly started main system side.

D0 Problems to be Solved by the Invention The drawing display device of such a system also has a duplex configuration. Therefore, the graphic display device is also a 110 device, and when the main line to be connected becomes down 1 or the slave line, the connection is switched to the new line. Even at this time,
Online status information is coming up. By the way, the online status information is mainly due to the dual online network.
The signal is received by both secondary channels, or the main channel receives and transmits to the subordinate channel. The subordinate series must always manage the same data as the main series so that it can be raised to the ascending series when necessary.

Online status information is processed and managed in the same way as the main system. However, the processing is not synchronized between the series, and the eggs are processed only when they are received individually. Therefore, if online status information is received when switching between series of graphic display devices, there is a possibility that the status information cannot be reflected in the corresponding equipment graphic segment of the graphic display device due to switching processing time or processing time difference between series. . That is,
After the graphic display device is disconnected from the old master system (new master system), the system receives status information, and before the graphic display device is connected to the old slave system (new master system), the old slave system (new master system) ) processes the status information, and the status display of the graphic display device may not be updated. Such systems do not provide sufficient reliability. If, after switching the graphic display device, all equipment segments were updated with the managed equipment status information, it would be possible to prevent the status information from being omitted, but this process would take a considerable amount of time, and after switching the graphic display device, There is a problem in that we have to suspend operations for a while.

An object of the present invention is to quickly and reliably reflect on-line equipment status information received at the time of switching between host computer series of a graphic display device 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.

IA and IB are host computers each having the same functions, and one acts as a main system and the other as a slave system. The host computer LA (LB) has a drawing information storage area 2A (2B) that stores drawing information that is used for actual operations and superimposes managed equipment on a map, and a drawing information storage area 2A (2B) that stores the status information of each equipment that is imported online. The equipment status table 3A (3B) to be stored and updated is compared with the status information of each equipment imported online and the previous contents of the equipment status table 3A (3B) to determine whether or not the status of each equipment has changed. A state change recording section 4A (4B) for recording is provided. The graphic display device 5 is also provided with a segment buffer 6 for storing drawing information. 7 is a communication line.

Each element of the equipment status table 3A (3B) corresponds to the equipment to be managed, l=1, and stores the status of each equipment. Regarding each element of the state change recording section 4A (4B), 1. 1, and the recorded content is ``with a change in status'' or ``no change in status.''

F1 Operation It is now assumed that one host computer IA is connected to the graphic display device 5 to perform normal work, and the other host computer IB is disconnected from the graphic display device 5. In this case, these host computers IA and IB become the main system and the slave system, respectively. Both the host computers 1A and 1B compare the equipment status information imported online with the contents of the equipment status tables 3A and 3B, detect equipment with a change in status (hereinafter referred to as a ``change in status''), and identify the occurrence of a change in status. The contents of the equipment status tables 38 and 3B are updated for the equipment that has changed (hereinafter referred to as "equipment with changed condition"). The main host computer IA updates the state expression format of the segment in the segment buffer 6 corresponding to the state-changing equipment, such as the display color or shape.

Here, for example, in order to perform master-slave series switching due to maintenance 1 inspection etc. of the host computer IA of the main series, the host computer IA
When A is disconnected from the graphic display device 5, the other host computer IB, which becomes the new main system, updates the contents of the equipment status table 3B for equipment whose condition has changed before being connected to the graphic display device 5. At the same time, the contents of the state change recording section 4B are changed to "change in state". It is assumed that this status change recording unit 4B has been initialized (set to "no status change" for all equipment) by the time the master-slave system is switched.

Next, when the other host computer @IB is connected to the graphic display device 5, the host computer IB takes out the equipment marked as "changed" from the status change recording unit 4B and refers to the equipment status table 3B for the equipment. The state of the segment in the segment buffer 6 is updated. In this way, the master and slave series are switched, and the master and slave series are reversed between the host computers IA and IB.

G. Example of implementation An example will be described using FIGS. 2 to 4.

Online equipment status information is shown on the rotation side, host computers LA and IB are shown in the center of the figure, and a graphic display device is shown on the right side of the figure.

Inside the graphic display device 5, equipment segments are shown. One element of each data set indicates the corresponding equipment name in alphabetical letters. The equipment status value is 0N10FF, and the status is expressed using red/green colors.

a0 Normal equipment status information processing FIG. 2 shows the processing when equipment status information is received. Initially, host computer IA is the main system, and host computer IB is the slave system. Assuming that there is a change in equipment H,
The main host computer IA updates the status of the equipment status table 3A and the corresponding equipment segment of the graphic display device 5. The host computer 1B, which is a subordinate system, updates the equipment status table for the equipment whose condition has changed.

b. Series switching FIG. 3 shows the processing when the host computer's series is switched. Host computer IA becomes subordinate, and host computer I
B becomes the main sequence. Also, the graphic display device 5 is disconnected from the host computer XA. Assume that there is a change in the condition of equipment H after the graphic display device 5 is disconnected and before it is connected to a new main-series host computer IB. The host computer IA, which has become a new slave, updates only the equipment status table 3A for the equipment that has changed in condition, and the host computer IB, which has newly become the main sequence, updates the equipment status table 3 for the equipment that has changed in condition.
B is updated and the contents of the state change recording section 4B are set to "state change".

C1 graphic display device connection process The process when connecting a graphic display device to a new main line is the fourth
As shown in the figure.

The new main-series host computer LB detects the state-changed equipment H from the state-change recording unit 4B, and updates the state of the corresponding equipment segment of the graphic display device 5 with reference to the equipment state table 3B.

In the above example, each element of the equipment status table and status change recording section is associated with a segment in the segment buffer, but this correspondence is not limited to each segment, but is per IDB. It may be a graphic information unit larger than a segment.

Fl, Effects of the Invention In the present invention, a status change recording unit is provided to record status change equipment that occurs during switching of graphic display devices between series, and to update the status of the segment of the status change equipment after connecting the graphic display device. By doing so, it is possible to prevent failure to update the status during series switching of the graphic display device, and to realize a highly reliable online diagram display device. By treating only state-changing equipment when the graphic display device is connected, time-consuming I10 operations on the graphic display device can be minimized, and business can be started immediately after the graphic display device is connected to the new system.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing the overall configuration of the present invention, FIG. 2 is an explanatory diagram showing equipment status information processing during normal times, FIG. 3 is an explanatory diagram showing status information processing during disconnection of the graphic display device, and FIG. The figure is an explanatory diagram showing the connection process of the graphic display device, FIG. 5 is a block diagram showing the overall configuration of the graphic display device, FIG. 6 is an explanatory diagram showing the state of graphic superimposition, and FIG. 7 is an explanatory diagram showing the video signal generation. FIG. 2 is a block diagram showing the mechanism. IA, IB...Host computer, 2A, 2B...
Drawing information storage area, 3A, 3B... Equipment status table, 4A, 4B... Status change recording section, 5... Graphic display device, 6... Segment buffer. Fig. 1 A light tone O tokumu Fig. 2 Fig. 3 (27F # J!
Figure 4 Mouth shape 11o inoculation treatment

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 takes in the status information of each facility online and displays it on the graphic display device in real time.The host computer consists of a main series and a slave series, and always displays the graphic The equipment is connected to the main system side for work, and the subordinate system side processes the data contents to be the same as the main system side while waiting. The status information of each piece of equipment that has been imported online is sent to the drawing display device. Compare the stored and updated equipment status table with the status information of each piece of equipment that was imported online when the graphic display device was disconnected from the host computer, and the contents of the equipment status table to record whether or not there has been a change in the status of each piece of equipment. a state change recording unit is provided in each of the main-series host computer and the slave-series host computer, and when the connection of the graphic display device is switched between the main-series host computer and the slave-series host computer; Then, based on the recorded contents of the status change recording section in the newly switched host computer, the equipment whose status has changed is searched, the current status of the equipment is grasped from the equipment status table, and the segment is updated based on the current status of the equipment. A drawing display device characterized in that the state of each graphical information unit related to equipment in a buffer is updated.