JPH0626889A - Graph display - Google Patents

Abstract

PURPOSE:To attain effective plant surveillance by deleting and recovering unnecessary trend graph on the same screen without scrolling the display screen and monitoring many trend graphs in a short time. CONSTITUTION:Process data sent from a plant 1 is displayed on a CRT display device 6. If there are trend graphs desired to delete among displayed ones on the CRT display device 6, the operator touches a specified part on the touch screen device 10. A coordinate conversion part sends the directed coordinate to a display output control part 12 and the display control part 5 indicates the trend graph on the CRT display device 6 in the deleted state of the trend graphs desired to be deleted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a graph display device for displaying process data of a thermal power plant or the like as a trend cliff.

[0002]

2. Description of the Related Art In a thermal power plant or the like, process data is displayed as a trend graph on a CRT display device for monitoring in order to perform efficient plant operation.
When monitoring such a plant state, a screen display in the form of a graph capable of grasping the temporal change in the process state quantity is performed, and a typical example is a trend graph. The trend graph is a curve display on the CRT display device of a temporal change in the process state quantity, such as the amount of power generation, which changes with time in a power plant or the like. By the way, when displaying such a trend graph, for example, a plurality of trend graphs of the same kind of process state quantity such as temperature and rotation speed may be displayed. As a result, it becomes difficult to distinguish between the two, which may interfere with plant monitoring.

When it is difficult to identify such overlaps, only the graph of interest is displayed, and the trend graph necessary for monitoring is deleted, or the deleted graph is restored. Operate the function keys on the registration display screen in the menu for dialogue,
Graphs were deleted or restored by repeatedly registering or deleting setting items and switching display screens.

[0004]

However, if a setting item is registered or deleted from the registration display screen and the operation of switching the display screen is performed, the operation requires time and labor, which hinders emergency response. And could affect effective plant monitoring.

The present invention has been made in view of the above problems, and an object thereof is to erase or restore unnecessary trend graphs on the same screen without switching the display screen. Another object of the present invention is to provide a graph display device capable of monitoring many trend graphs in a short time and effectively monitoring the plant.

[0006]

In order to achieve the above-mentioned object, the present invention shows a display means for displaying a plurality of process data as a graph together with information indicating a plurality of process data and the plurality of process data. A graph display including an instructing means for instructing any one of the information and a means for erasing or restoring the graph of the process data corresponding to this information when the instructing means instruct the information indicating the process data. It is a device.

[0007]

According to the present invention, when the information indicating the process data is instructed by the instructing means, the graph of the process data corresponding to this information is erased or restored without switching the display screen.

[0008]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of a graph display device according to an embodiment of the present invention. In the figure,
Reference numeral 1 denotes a plant, and the data collection unit 2 collects process data from the plant 1. The storage unit 3 stores the amount of process data collected by the data collection unit 2 that can be displayed on the screen and the surplus amount. The input unit 9 is a keyboard for inputting necessary information. The display item registration unit 7 registers an input point of process data necessary for display, a display range, and the like based on the input information of the input unit 9. The display data editing unit 4 reads out the necessary process data from the storage unit 3 and creates the display data necessary for the graph display according to the items registered by the display item registration unit 7. Display control unit 5
Converts the display data so that it can be displayed on the CRT display device 6 and outputs it. The CRT display device 6 displays the converted data so that the display control device 5 can display the data.
The display unit 8 requests the graph display from the input unit 9. The touch screen device 10 is a CRT display device 6
This is to input an arbitrary position on the screen.

FIG. 2 shows the touch screen device 10. This touch screen device 10 has a C
It is installed just before the display screen of the RT display device 6 and emits infrared rays vertically and horizontally as shown in FIG. When the touch screen device 10 is touched with a finger, it is detected that infrared rays are passing through, as shown in FIG. Coordinate conversion unit 11
As shown in Fig. 4, the points where infrared rays can be blocked are
It is converted into XY coordinates indicating the position of the screen on the CRT display device 6 and sent to the display output selection processing unit 12.

The display output selection processing unit 12 includes a coordinate conversion unit 1.
The comparison table 1 is checked by comparing the coordinates sent from 1 with the comparison table 15.
When the designated coordinates are coincident with the erase and return areas registered in 5, the operator's command information is determined to determine whether to erase or restore the graph. The display unit 8 requests the graph display from the input unit 9.

Next, the operation of this embodiment will be described.
When the plant 1 is started, the operator registers in advance the input points necessary for display, the display range, etc. in the display item registration section 7 from the input section 9. The data collection unit 2 includes a display item registration unit 7
Process data is collected from the plant 1 according to the items registered from. The process data collected in this way is the amount that can be displayed on the screen in the storage unit 3 and the extra amount,
Saved.

When displaying a trend graph, the display data editing unit 4 reads the process data from the storage unit 3 along with the registered items by making a graph display request from the display unit 8, and a display for displaying the process data is displayed. Create the data. The created display data is displayed on the display controller 5 as C
It is displayed on the RT display device 6 as a trend graph display screen.

FIG. 5 shows this trend graph display screen. On this display screen, four trend graphs (1), (2), (3) and (4) are displayed.
The three trend graphs with the numbers (1), (2), and (3) are overlapped with each other and are difficult to identify.

Therefore, the process for deleting the trend graph of (2) will be described below. FIG. 6 is a flowchart showing the processing at this time. The operator
On the touch screen device 10, any part of the touch area A where the trend graph (2) can be selected is touched with a finger to give an instruction (step 601). When such an instruction is made, the coordinate conversion unit 11 converts the coordinate to the position indicating the position of the display screen on the CRT display device 6 with respect to the instructed point, and notifies the display output selection processing unit 12 (step 602).

The display output selection processing unit 12 includes a coordinate conversion unit 1.
When the coordinates sent from 1 and the comparison table 15 are collated (step 603), and the coordinates sent from the erase and return areas registered in the comparison table 15 match,
The response is transmitted to the CRT display device 6 via the display control unit 5 (step 604). As a result, the CRT display device 6
Then, the trend graph of (2) is displayed in a deleted form.

Next, when the trend graph of (2) is restored, by touching the portion A on the touch screen device 10 with a finger, the coordinate conversion unit 11 causes the CRT display screen for the designated location. Is converted into coordinates indicating the position of and is transmitted to the display output selection processing unit 12. The display output selection processing unit 12 collates the sent coordinates with the comparison table 15, and if the erased and restored areas registered in the comparison table 15 match the designated coordinates, The response is transmitted to the CRT display device 6 via the display control unit 5. As a result, the graph of (2) is displayed in the restored state on the CRT display device 6. After that, by repeating the same operation, it is possible to easily erase or restore any trend graph.

As described above, according to this embodiment, the touch screen device 10 is used for the displayed trend graph.
By inputting an instruction from the display screen, the trend graph can be erased and restored on the same display screen without switching the display screen, so there is no need to register or delete display screen switching items as in the past. The number of operations can be reduced, more trend graphs can be monitored in a short time, emergency response can be facilitated, and effective plant monitoring can be performed.

FIG. 7 shows another embodiment of the present invention. In this embodiment, instead of the touch screen device 10, a light pen 13 or a mouse 14 is used to indicate an arbitrary place on the display screen of the CRT display device 6.

[0020]

As described above in detail, according to the present invention, unnecessary trend graphs can be deleted or restored on the same screen without switching the display screen, and many trends can be achieved in a short time. The graph can be monitored and effective plant monitoring can be performed.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a graph display device according to a first embodiment of the present invention.

FIG. 2 is a diagram showing a touch screen device 10.

FIG. 3 is a diagram showing an input of the touch screen device 10.

FIG. 4 is a diagram showing an input of the touch screen device 10.

FIG. 5 is a diagram showing a trend graph displayed on a CRT display device 6.

FIG. 6 is a flowchart showing the main operation of the first embodiment.

FIG. 7 is a block diagram showing a configuration of a graph display device according to a second embodiment.

[Explanation of symbols]

 1 ... Plant 2 ... Data collection unit 3 ... Storage unit 4 ... Display data editing unit 5 ... Display control unit 6 ... CRT display device 7 ... Display item registration unit 8 ... Display unit 9 Input unit 10 Touch screen device 11 Coordinate conversion unit 12 Display output selection processing unit 13 Light pen 14 Mouse 15 Comparison table

Claims (1)

[Claims] 1. A display unit for displaying a plurality of process data as a graph together with information indicating a plurality of process data, an instruction unit for instructing any one of the information indicating the plurality of process data, and the instruction unit. A graph display device comprising: means for deleting or restoring a graph of process data corresponding to this information when an instruction of information indicating the process data is given.