JPH0635424A - Plant monitor and control equipment - Google Patents

Abstract

PURPOSE:To smoothly rotate display contents between CRTs while maintaining monitoring operation on the own CRT by providing a matrix switch which selects and takes two optional signals out of plural signals. CONSTITUTION:An image capture reproducing board captures a monitor image of ITV and outputs a video signal 3c. Then 1st and 2nd CRT control boards output video signals 5c and 6c for constituting their monitor scans. The video signal 5c is normally assigned for the output video signal 31a of a video matrix switch 31 and the video signal 3c is assigned for the output video signal 31b. When the display contents are rotated between the CRTs, a video signal 6c is assigned for the video signal 31b. An image composing circuit 33 composes one image of the images of inputted digital video signals 32a and 32b. The output signal 33b of the image composing circuit 33 is outputted as a display output signal 21 to the 1st CRT.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plant monitoring control device having an image synthesizing function.

[0002]

2. Description of the Related Art Conventionally, there are a code refresh method and a dot refresh method (also called a bit map method) as a screen control method for a CRT display. The former is a video RAM (random access me).
is a method of storing a character code, converting it into a display pattern on a CG-ROM, and displaying the converted pattern.
In this method, the display pattern is directly stored in the video RAM. There are cases where only the latter is used and cases where both are used together.

One of the major characteristics of the workstation is graphics. High-resolution bitmap display (one point on the display corresponds to the memory and can be freely read and written by the CPU) and a pointing device called a mouse for specifying the position on the display And a device. Since a display performance that satisfies the user cannot be obtained only by the CPU, many of them have special hardware for coordinate conversion and drawing.

Other input devices include a keyboard, a tablet, a scanner and the like. The output device includes a dot printer, a laser printer, a plotter, and the like. In addition, the display control section is a display timing control section that generates horizontal and vertical sync signals supplied from the sync playback section and various timing signals related to screen display from the display clock, and display memory control that inputs and outputs data to the display memory. Section, a display memory, and a section for synchronizing the data written in the display memory with a horizontal / vertical synchronizing signal, reading the data from the memory, and converting it into an analog RGB signal. There are two types of display memories, a block coloring type corresponding to level A and a bitmap type corresponding to level B.

The block coloring type has a pattern memory in which character / graphic patterns are written and a color memory in which display attribute data such as foreground color, background color and flushing, and concealment are written in 4 × 4 dot block units. Data is read, the outputs are combined, D-A conversion is performed, and the analog RGB signals are output.

Next, regarding the matrix switch,
Conventional optical communication has made rapid progress for transmission systems, but optical technology is about to penetrate into the area of exchange. Various optical communication paths have been proposed as means for realizing this new technology called optical switching as opposed to electronic switching. Among them, space division
Type optical communication path can be constructed mainly by using matrix optical switches, so various devices are required for time division (ti
me division) or wavelength division (wav)
It is said that the realization time is earlier than that of the height division type. That is, a space-division optical switching circuit (space switch) that rearranges spatially arranged optical signal lines in a matrix form and switches a broadband signal such as image information as light is used as an optical time memory or a wavelength conversion element. In comparison, relatively early practical application is expected. And a tightly coupled multiprocessor (TCM
P: tightly coupled multipr
processor) is composed of a plurality of processors sharing a main memory. In general-purpose machines, matrix switches are commonly used, and bus connections are often used in minicomputers and below. Since access concentrates on one main memory device, contention may occur, which may cause a performance bottleneck.
It has been widely put to practical use on a scale up to a processor. Although physically controlled by one OS existing in the shared main memory, this OS can run simultaneously on a plurality of processors.

In a tightly coupled multiprocessor system, tasks within the system can be performed on essentially any processor. When there is no work to be executed, each processor takes out the highest priority task from the list of executable tasks created in the shared main memory and executes it.
Therefore, in the case of loose coupling, a large unit called a job is consciously distributed, whereas the load distribution among the processors is automatically and finely optimized. In addition, the entire main memory area can be dynamically and flexibly allocated to tasks in the system as needed. From the viewpoint of reliability, it can be said that the processor has a property close to an ideal one because another processor can immediately take over the processing in the case of a processor failure. However, since main memory is the only resource, it is vulnerable to the damage that occurs here. Although there is a method of backing up, performance problems can occur only in the main memory that is the bottleneck of performance. From the aspect of adaptability, it has a configuration that can flexibly deal with expansion and dynamic change of function allocation. 2. Description of the Related Art Generally, as a man-machine interface device for plant equipment and process monitoring and control, a monitoring device including a CRT and a keyboard for displaying a required screen when necessary is widely used. However, if the equipment becomes large-scale, the number of display items increases, or there are multiple items that you want to constantly monitor, or if there are multiple operators at all times, you may be provided with multiple CRT devices for each monitoring item in charge of each person. . Even when a plurality of CRT devices are provided as described above, there is an operational problem that the display items of the CRT devices are completely independent of each other.
It is generally necessary to have a relationship between the operator and the distance between the operator and the installation position, backup when one unit is out of order, a monitor function for the display contents of other CRTs, and rotation of the display contents between CRTs.

In order to create a normal CRT display screen,
A CRT control board including a CPU, a CRT control LSI, and a bitmap memory is assigned to each CRT, and is connected to the main control board and other CRT control boards by a system bus. Therefore, in order to realize the above-mentioned function, in order to display the other CRT display screen on the own CRT, it is necessary to fetch the display data (generally in the bitmap) into the own CRT control board by some method. As one of the methods, there is a method of reading display data from another CRT control board via the above-mentioned system bus. In this case, since a large amount of display data is transferred, the system bus is occupied and the bus overhead increases. Another method is to always retain the display data of all the CRT control boards and normally display the screen in charge of the own CRT, while displaying the screen in charge of another CRT if necessary. As a result, the drawback of deterioration of responsiveness due to increase of the drawing time and drawing time becomes obvious. Therefore, the method of switching the output signal to the CRT itself by a video switch or the like to change the display screen is used as the simplest and surest method.

However, according to this method, the CRT display content is, of course, either the output of the own CRT control board or the output of another CRT control board.
It can be seen that it is impossible to refer to other CRT display contents while monitoring the display screen. Also, while maintaining the original monitoring function that constantly displays the latest plant and process information in text and graphics,
It can be seen that it is completely impossible to add a function of displaying new media such as a moving image on the same CRT screen when necessary.

[0010]

SUMMARY OF THE INVENTION In view of the problems of the prior art described above, an object of the present invention is to smoothly rotate the display contents between CRTs while maintaining the monitoring by the CRT in the CRT monitoring control device. It is to provide a plant monitoring control device having a function capable of flexibly coping with the addition of new media functions such as video display while maintaining the original monitoring function.

[0011]

According to the present invention, an ITV camera for monitoring a real image of a plant, an input / output board for inputting / outputting a status signal in a plant process, and an ITV image signal output from the ITV camera are provided. An image capturing / reproducing board for capturing and reproducing as an ITV video signal, a system bus connected to the image capturing / reproducing board and the input / output board for transmitting the display data of the plant system, and the status signal and the ITV video signal on the video RAM. A plurality of CRT display screen control boards adopting a bitmap method that directly accommodates the display pattern, and these CRTs.
A matrix switch that receives a video signal and an ITV video signal output from the display screen control board, selects and extracts any two signals from the plurality of signals, and an analog image signal selected by the matrix switch A / D converter for converting to a digital image signal, an image synthesizing circuit for synthesizing the two digital image signals converted by the A / D converter, and a synthetic analog image for synthesizing the synthetic digital image signal synthesized by the image synthesizing circuit It is a plant monitoring control device comprising a D / A converter that outputs a signal to a CRT display device.

[0012]

In the plant monitoring control apparatus of the present invention, I
The real image of the plant is monitored by the TV camera, the status signal in the process of the plant is input and output, the analog composite type ITV image signal output from the ITV camera is captured, and is reproduced as the ITV video signal by the image capture / reproduction board. Then, the system bus is connected to the image capture / reproduction board and the input / output board, the display data of the plant system is transmitted, the status signal and the ITV video signal are directly stored on the video RAM to accommodate the display pattern, and the CRT display screen control board is used. An analog composite video signal and an ITV video signal to be output are input by a matrix switch, two arbitrary signals are selected and extracted from the plurality of signals, and the analog image signal selected by the matrix switch is converted into a digital image. Converted to a signal and converted to A / D And combining two digital image signal converted by, CR composite digital image signal synthesized by the image synthesizing circuit as a composite analog image signal
Output to T display device.

[0013]

EXAMPLE An example of the present invention will be described below. In FIGS. 1 and 2, 4 is an ITV camera for monitoring a real image of a plant, 2 is an input / output board for inputting / outputting a status signal in a plant process, and 3 is an analog composite ITV output from the ITV camera 4. Capture the image signal and
Image capture playback board that plays back as a TV video signal, 10
Is a system bus connected to the image capturing / reproducing board 3 and the input / output board 2 for transmitting the display data of the plant system, and 5 and 6 are bit maps for accommodating the display signals of the status signal and the ITV video signal directly on the video RAM. CRT display screen control board adopting the method, 31
Is an analog composite type video signal and ITV output from the CRT display screen control boards 5 and 6.
A matrix switch for inputting a video signal and selecting and extracting any two signals from these plural signals, and 32 and 42 for converting an analog image signal selected by the matrix switch 31 into a digital image signal A / D converters, 33 and 43 are image synthesizing circuits for synthesizing the two digital image signals exchanged by the A / D converters 32 and 42, and 35 and 45 are synthetic digital image signals synthesized by the image synthesizing circuits 33 and 43. A D / A converter that outputs to the CRT display devices 5D and 6D as a composite analog image signal, has a plurality of CRT display devices (hereinafter referred to as CRTs), and has a rotation function of display contents between CRTs and a plant moving image. In a supervisory control device requiring surveillance, a video matrix switch, an AD controller Over data, digital image synthesizing circuit, D
Equipped with an image selection and synthesis device consisting of an A converter, etc.,
Necessary video signals for each surveillance CRT and surveillance camera video signals can be selected by the operator, and by switching the display contents and combining and displaying a plurality of images,
It is a plant monitoring control device characterized in that it is possible to easily monitor the display contents of another CRT and monitor the moving image of the plant.

That is, of the analog composite output signal (hereinafter referred to as a video signal) from the CRT control board that drives the monitoring CRT and the video input signal for moving image reproduction, the video signal to be output is a video that can be selected by the operator. By combining the matrix switch and the selected and output multiple video signals into one video signal by an external control command, it is possible to display multiple images on one CRT screen only by hardware without software. By having an image synthesizing circuit that operates, and driving the monitoring CRT with the output video signal of the image synthesizing circuit, it is easy to monitor other CRT display screens for monitoring, rotate between CRTs of display contents, and display video function. It is a CRT monitor and control device that can handle the above.

FIG. 1 shows the basic configuration of this embodiment.
Two CRTs are used for the sake of explanation. 2A represents status signals of various sensors and devices of Blunt. Reference numeral 2 is an input / output board that interfaces these signals with the CRT monitoring and control device, and 1 is C via the system bus 10 based on signals from the operation input device 1A and the input / output board 2.
A CPU board 4 that controls the entire RT monitoring control device represents an ITV camera for monitoring a real image of the plant. The output form of the ITV is an analog composite type (video signal) as a standard, but is input to the image capturing / reproducing board 3. Image capture / playback board 3 is CP
The monitoring video of the ITV 4 is captured by the operator's instruction through the U board 1 and the operation input device 1A and saved (held) in the storage medium 3A such as a hard disk, and when necessary, the necessary video data is read out from the storage medium 3A and reproduced or Outputs the video signal 3C for through display, which immediately displays the captured data without saving it. This video signal 3
It is easy for C to use the same output signal format analog composite as ITV.

# 1 CRT control board 5 and # 2 CRT
The RT control boards 6 are originally CRT 5D and CRT 6 respectively.
A controller for driving D, a CPU board 1 sent via the system bus 10, and a storage device 5B, if necessary, according to instructions from the input device 5A and the latest data,
Data for monitoring screen construction is read from 6B, and each CR
The monitoring screen is updated to T5D and 6D. CRT
The format of the outputs 5C and 6C of the control boards 5 and 6 is CRT5.
It depends on the format of the D and 6D input signals 21 and 22, and the color signals R, G, B, SYNC separation type and the analog composite type in which luminance, color information, and SYNC (synchronization) signals are multiplexed. is there. In any case, it is easy to use the same output format as the image capturing / reproducing board output 3C.

The image selection / synthesis device 20 selects any two signals from the input video signals in accordance with an instruction sent from the CPU 1 via the control line 11 and outputs them as necessary.
Display output signal 21 to CRT5D and output signal 22 to CR for composite display of screens (one is displayed as main screen and the other is displayed as sub-screen) or only one screen is switched and displayed.
It is output to T6D.

FIG. 2 shows the internal structure of the image selection / synthesis device 20. Video matrix switch 31
Is basically a set of analog switches and has a function of selecting and outputting a desired signal from a plurality of analog input signals. This can be easily realized by a general-purpose LSI if it has a function of about 6 inputs and 4 outputs, for example. In the figure, for the sake of explanation, the video signals 31A, 31B, 31C and 31D selected from the input video signals 3C, 5C and 6C by the control signal 11C via the system bus 10 are used as the outputs of the video matrix switch.

A description will be given below in connection with the CRT 5D.

In operation of the CRT monitor controller, the output 31A of the normal video matrix switch 31 is assigned to the output video signal 5C of the CRT control board 5, and the video signal 31B is assigned to the output video signal 3C of the image capturing / reproducing board 3. The output video signal 6C of the CRT control board 6 is assigned to the video signal 31B when the display contents are rotated between CRTs. In either case, the AD converter 32 converts the analog signal into a digital signal. Converted digital video signals 32A, 32B
Is input to the image synthesizing circuit 33 and digitally image-synthesized. Inside the image synthesizing circuit 33, the two input digital video signals are each decomposed into components (luminance and color tone components), phase synchronization signal processing, band limitation by a low pass filter, and video data (especially video data on the sub-screen side). ) Data compression processing is performed, and image data for one frame is displayed after being saved in the internal memory or the external memory 34 in consideration of the display positions of the main screen image, the sub screen image, and the sub screen according to the external control signal 11A. The composite data is output to the output signal line 33B at a predetermined frequency, but these functions can be easily realized by a general-purpose LSI. The output signal 33B is CR
The image is converted into an analog composite (video) signal so as to match the input signal type of T5, and the combined image is displayed on the CRT. The circuit AD converter 42 for the CRT 6D, the image synthesizing circuit 43, the external memory 44, and the AD converter 45 also operate in exactly the same manner.

In order to realize this circuit, a video signal sampling clock circuit, a synchronizing signal processing circuit, and two video signal phase adjusting PLLs (PHASE LOCKED).
A LOOP) circuit or the like is required, but is omitted because it is not directly related to the present invention.

[0022]

According to the present invention, it is possible to easily rotate the CRT display contents between CRTs and monitor other CRT display contents without changing the hardware and software of the CRT control board, which improves the monitoring environment. With the same signal format, the introduction of new media such as video display and video monitoring can be quickly realized.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a plant monitoring control apparatus according to an embodiment of the present invention.

FIG. 2 is a configuration diagram of an image selection / combination device.

[Explanation of symbols]

 2 I / O board 3 Image capture / reproduction board 5, 6 CRT control board 20 Image selection / synthesis device 31 Video matrix switch 32 AD converter 33 Image synthesis circuit 35 DA converter

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification number Office reference number FI technical display location H02B 15/00 E 7028-5G // G05B 23/02 301 T 7208-3H

Claims (1)

[Claims] 1. An ITV camera for monitoring a real image of a plant, an input / output board for inputting / outputting a status signal in the process of the plant, an ITV image signal output from the ITV camera, and an ITV video signal. Image capturing / reproducing board to be reproduced as an image capturing / reproducing board, a system bus connected to the image capturing / reproducing board and the input / output board for transmitting display data of a plant system, the status signal and the ITV video signal on a video RAM. Multiple CRs that adopt the bitmap method that directly accommodates the display pattern
A T display screen control board, a matrix switch for inputting a video signal output from the CRT display screen control board and the ITV video signal, and selecting and extracting any two signals from the plurality of signals; An A / D converter for converting the analog image signal selected by the matrix switch into a digital image signal, an image synthesizing circuit for synthesizing the two digital image signals exchanged by the A / D converter, and this image synthesizing circuit And a D / A converter for outputting the synthesized digital image signal synthesized in step 1 to a CRT display device as a synthesized analog image signal.