JPH1063457A - Display method for radar chart graph - Google Patents

Abstract

PROBLEM TO BE SOLVED: To sensuously read the transition trend of a value at a glance and improve user's convenience by displaying a difference value from last one at a display request by using a symbol of an arrow. SOLUTION: Symbols 4010-4060 at temperature measurement points (a)-(f) show correspondence to temperature measurement points in a blast furnace. The vertex coordinates of a polygon shown in a temperature distribution chart 4070 indicate temperatures at the respective measurement points. Further, the symbol of the arrow displayed in contact with the center point of the radar chart graph shows the difference value 4080 from a last displayed radar chart graph. The difference value 4080 is displayed outwardly from the center point of the radar chart graph when increasing and inwardly when decreasing. Thus, the difference value 4080 is represented with the length of the arrow symbol and the increase or decrease is indicated by the direction of the arrow symbol, so the state of the transition can sensuously be read.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method of displaying a radar chart graph showing a state value in a plant monitoring system.

[0002]

2. Description of the Related Art In a plant monitoring system, a radar chart graph is often used to show general trends such as a temperature distribution diagram of a blast furnace. In general, the radar chart graph erases the figure currently displayed at the timing of display update, and redraws it with new data. This method always indicates the value of the latest data.

[0003]

When using a conventional radar chart graph, when considering how the transition has been made in comparison with the value before display update, the information obtained is the display information stored in the head. Compared to the graphic before the update, the degree is “generally increasing” or “there is a slight increase in the upper right direction and the lower direction, and a large decrease in the upper left direction”. In addition, in order to determine the amount of increase or decrease, it is necessary to obtain the difference between the value shown in the current graph and the value shown in the graph before update, and it is difficult for the user to understand at a glance. There is a point.

[0004] It is an object of the present invention to improve the convenience for the user by indicating the difference from the value before the display update with an arrow symbol so that the user can intuitively read the transition tendency of the value at a glance. It is in.

[0005]

[Means for Solving the Problems] At the time of display update, the value acquired by the previous display request, the value acquired by the latest display request,
A table for storing the difference between the value of the previous display request and the value of the latest display request as a difference value, and means for storing the difference in the table are provided. Further, there is provided means for displaying the difference value on the axis from the center point of the radar chart graph using an arrow symbol. Thus, each time a display request is issued, it is possible to display the difference value from the previous time using the arrow symbol.

When a data display request is issued, the data currently being displayed is stored as the previous value, the data obtained by the display request is set as the latest value, and the difference between the previous value and the latest value is set as the difference value. , Stored in a table. Then, the radar chart graph is redrawn using the value stored as the latest value and the arrow symbol using the value stored as the difference value. At this time, the arrow symbol is in contact with the center point of the radar chart graph, and is arranged on the axis line of the radar chart graph so as to be directed outward from the center point in the case of increase and inward in the case of decrease.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present embodiment is applied to a case where a temperature distribution around a blast furnace is shown in a radar chart graph in a man-machine environment for monitoring a plant.

FIG. 1 is a configuration diagram of an embodiment of a plant control system to which the present invention is applied. The blast furnace 1110 to be monitored by this system has a thermocouple 11 as a temperature measuring device.
20 are installed, the measured data is sent to the converter 1100 through the thermocouple cable 1130, converted into a signal that can be processed by the workstation 1010, and connected to the I / O port 1090 of the workstation 1010. Further, a keyboard 1070 and a mouse 1080 are connected as input devices to the workstation 1010, and a display 1060 is connected as an output device. In the workstation 1010, a central processing unit (hereinafter abbreviated as CPU) 1020
Is connected to the main memory 1030. The main memory 1030 stores the processing program 10
40, a display request data management table 1050 is stored.

FIG. 2 shows a display request data management table. The display request data management table 2010 includes the latest data 2030 stored at the time of occurrence of the latest display request, the previous data 2020 indicating the immediately preceding data to be updated, and the latest display request since the last display request occurred. 2040 (hereinafter abbreviated as update time) until the last data 2020 and the latest data 2030
Are the display request generation times (hereinafter abbreviated as display request generation times) 2050, 2100, values for displaying in a radar chart graph (hereinafter, abbreviated as display request values) 2060, 2110, and Difference from the immediately preceding display request value to be updated (hereinafter abbreviated as difference value) 207
0, 2120, the amount of change in the display request value per unit time (hereinafter, abbreviated as change speed) 2080, 2130, and the amount of change in the change speed per unit time (hereinafter, abbreviated as change acceleration) 2090, 2140 are stored. In each case, data for the number of measurement points is stored.

FIG. 3 is a top view of the blast furnace shown in FIG. 1 cut into a circle at the height of a thermocouple. Thermocouple 301
The symbols of a to f are attached to the temperature measurement points where 0 to 3060 are installed, and correspond to the radar chart graph shown in FIG.

FIG. 4 is a diagram showing a temperature distribution of the blast furnace of FIG. 3 in a radar chart graph of the present invention. Symbols 4010 to 4060 of a to f show the correspondence with the temperature measurement points of the blast furnace. The vertex coordinates of a polygon (hereinafter abbreviated as a polygon part of the radar chart graph) indicated by a solid line 4070 indicate the temperature of the case measurement point. Further, an arrow symbol 4080 displayed in contact with the center point of the radar chart graph indicates a value of a difference from the radar chart graph displayed last time, and when the difference value increases, the center point of the radar chart graph is displayed. From the outside, and inward when it decreases.

FIG. 5, FIG. 6, FIG. 7, and FIG. 8 show the flow when the present invention is applied. In the present embodiment, an example is shown in which the difference value, the change speed, and the change acceleration are switched and displayed by the user's instruction using the arrow symbol.

FIGS. 5 and 6 show a process when a display request for the temperature distribution of the blast furnace 1110 is generated. First, it is determined in process 5010 whether or not the display request is the first display request for the radar chart graph display process. In the case of the first display request, the display request data management table 2010 is initialized by processing 5020. Next, in step 5030, the data acquired by the display request is stored in the latest display request value storage area 2110. Next, in process 5040, the generation time of the display request is stored in the latest display request generation time storage area 2100. Finally, a radar chart graph is drawn with the latest display request value 2110 by processing 5050. On the other hand, if it is determined in step 5010 that the request is not the first display request,
By processing 5060, the latest data 2030 is moved to the previous data storage area 2020. Next, the data acquired by the display request in processing 5070 is stored in the latest display request value storage area 2.
Stored in 110. Next, at step 5080, the display request generation time is stored in the latest display request generation time storage area 2100.
To be stored. Next, in processing 5090, the difference between the last time and the latest display request occurrence time 2050, 2100 is determined to obtain the update time, and the updated time is stored in the update time storage area 2040. Next, in step 5100, the last and latest display request values 206
The difference between 0 and 2110 is calculated to obtain a difference value, which is stored in the latest difference value storage area 2120. Next, the process 5110 divides the latest difference value 2120 by the update time 2040 to obtain a change speed, and stores it in the latest change speed storage area 2130. Next, in processing 5120, it is determined whether or not the display request is the third or more display request for the radar chart graph display processing.
When it is determined to be the third time or more, the difference between the last change speed 2080 and the latest change speed 2130 is calculated by a process [5130], divided by the update time 2040 to obtain a change acceleration, and stored in the latest change acceleration storage area 2140. On the other hand, processing 512
If it is determined to be less than the third time based on 0, since the change speed is not stored in the previous change speed storage area, the change acceleration calculation processing 5130 is skipped. Next, in step 5140, the polygon 4070 of the radar chart graph is redrawn with the latest display request value 2110. Finally, processing 515
Arrow symbol 408 with latest difference value 2120 by 0
Redraw 0.

FIG. 7 is a diagram showing the processing of the drawing part of the arrow symbol. First, it is determined in step 6010 whether the value for drawing the arrow symbol is greater than 0, and if so, in step 6020, the direction of the arrow is turned out of the center of the graph, and the length corresponding to the value is set. To redraw and finish. On the other hand, if it is determined in step 6010 that the value is not larger than 0, it is determined in step 6030 whether the value for drawing the arrow symbol is smaller than 0. Redraw with the length corresponding to the value toward the center of the graph and finish.
On the other hand, if it is not smaller than 0, that is, if the value is 0, the process ends in step 6050 by deleting the arrow symbol currently drawn.

FIG. 8 shows a mouse 1080 and a keyboard 107.
This figure shows a process in which a value indicated by an arrow symbol is sequentially switched to the latest difference value 2120, change speed 2130, and change acceleration 2140 by using input means such as 0. This process is started when a user generates a display switching event using input means such as a mouse 1080 or a keyboard 1070. First, in step 7010, the value currently displayed by the arrow symbol is the difference value 2120
Is determined, and if the difference value is 2120, the symbol of the arrow is redrawn at the changing speed 2130 by processing 7020, and the processing is terminated. On the other hand, the difference value 21
If it is determined that the value is not 20, the process 7030 determines whether or not the value currently indicated by the arrow symbol is the change speed 2130, and if the value is the change speed 2130, the process 7030.
At 040, the arrow symbol is redrawn with the change acceleration 2140, and the processing ends. On the other hand, the change speed 213
If it is determined that the difference value is not 0, the difference 70
At 120, the arrow symbol is redrawn and the process ends.

FIGS. 9 and 10 show the effect of the present invention. In the conventional radar chart graph, the shape shown by the polygonal portion 8010 of the radar chart graph before the display update in FIG. 9 is updated to the shape shown by the polygonal portion 8020 of the radar chart graph after the display update after the display update. Indicates the state change of the measurement point. Here, when considering how the transition has been made as compared with before the display update, b, c, and b are compared with the figure before the display update stored in the head.
Only information can be obtained to the extent that d is increasing and e and f are decreasing. On the other hand, in the radar chart graph to which the present invention is applied as shown in FIG. 10, in addition to the values indicated by the vertices of the polygons 9010 and 9020 of the radar chart graph, difference values are displayed by arrow symbols 9030 and 9040. Therefore, the user can always obtain the tendency of the value transition. Also, since the arrow symbol is in contact with the center of the radar chart graph, the end point of the arrow symbol in the direction opposite to the center point of the radar chart graph becomes the absolute value of the difference value. Using the memories 9050 and 9060
The difference can be easily and accurately read. As described above, the absolute value of the difference is indicated by the length of the arrow symbol, and the increase or decrease is indicated by the direction of the arrow symbol, so that the transition state can be read intuitively.

[0017]

According to the present invention, the transition tendency of the values shown in the radar chart graph can be easily read, and the usability for the user is improved.

[Brief description of the drawings]

FIG. 1 is a block diagram of a device of a plant monitoring system to which the present invention is applied.

FIG. 2 is an explanatory diagram of a display request data management table.

FIG. 3 is a sectional view of the blast furnace as viewed from above.

FIG. 4 is a radar chart graph to which the present invention is applied.

FIG. 5 is a flowchart of a process when a display request is generated.

FIG. 6 is a flowchart of a process when a display request is generated.

FIG. 7 is a flowchart of processing for drawing an arrow symbol.

FIG. 8 is a flowchart of a process for switching data to be drawn with an arrow symbol.

FIG. 9 is a conventional radar chart graph.

FIG. 10 is a radar chart graph to which the present invention is applied.

[Explanation of symbols]

 4070: temperature distribution diagram, 4080: difference value.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroshi Kobayashi 5-2-1 Omikacho, Hitachi City, Ibaraki Prefecture Inside the Omika Plant, Hitachi, Ltd. (72) Inventor Masahiro Nakamura 5-chome Omikacho, Hitachi City, Ibaraki Prefecture No. 1 Hitachi Process Computer Engineering Co., Ltd.

Claims (3)

[Claims] 1. A radar chart graph in which values of a plurality of data are arranged on a radially extending axis and values on adjacent axes are connected by a line. It has a table to manage, and when a new display request is generated, the value of the difference from the data obtained by the display request immediately before the display request is indicated by an arrow symbol having the center point of the radar chart graph as an end point. A method for displaying a radar chart graph characterized by displaying. 2. An apparatus according to claim 1, further comprising: input means for instructing display switching represented by a mouse or a keyboard. How to display a radar chart graph showing the speed of change. 3. A radar chart graph display method according to claim 2, wherein, in response to a display switching instruction, an arrow symbol indicates an acceleration of a value change since the previous display request was generated.