JP2019008434A - Trend graph display device - Google Patents

Abstract

To make it possible to appropriately grasp occurrence of an overlap in displaying a plurality of trend graphs.SOLUTION: A trend graph display device comprises: a storing unit 102 that stores a plurality of types of measurement data; a display data creation unit 104 that creates display data of trend graphs in which transition of the measurement data is visualized for each of the types of the measurement data; an overlap determination unit 105 that determines whether or not an overlap is present in the plurality of trend graphs; a coloring determination unit 106 that sets display colors for the trend graphs different from each other, and sets a display color such that a display color of an overlap period of the plurality of trend graphs determined to have the overlap by the overlap determination unit 105 becomes a different color from the display colors of the plurality of trend graphs; and a display unit 107 that displays the display data to which the display colors are set by the coloring determination unit 106.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a trend graph display device that displays a trend graph that visualizes the transition of measurement data.

  2. Description of the Related Art Conventionally, a trend graph display device that graphs and displays measurement data collected at predetermined time intervals such as pressure, liquid amount, and temperature has been widely used (see Patent Document 1). The number of trend graphs that can be displayed at one time on the trend graph display device tends to increase due to user requests. The reason is to increase the data that can be monitored at once.

  However, when a plurality of trend graphs are simultaneously displayed on one screen, all or part of the trend graphs may overlap. The overlapped part is overwritten with the last displayed trend graph, and the other trend graphs are invisible. At this time, the values of the trend graph that cannot be overwritten can be divided into two values: (I) the same value as the last trend graph displayed, and (II) the measurement data is missing and no value exists. Although there is a possibility of a pattern, there is a problem that an operator looking at the screen cannot judge whether it is (I) or (II). As a result, the operator may miss a missing value.

JP 2012-133432 A

  The present invention has been made to solve the above-described problem, and when displaying a plurality of trend graphs, it is possible to appropriately grasp the occurrence of overlap, and to reduce the possibility of an operator overlooking a missing value. It is an object to provide a trend graph display device capable of

  The trend graph display device of the present invention creates a storage unit configured to store a plurality of types of measurement data, and display data of a trend graph that visualizes the transition of the measurement data for each type of measurement data. A display data creation unit configured to, a duplication determination unit configured to determine whether or not there is a display overlap in a plurality of trend graphs, and a different display color for each trend graph, Color arrangement determining unit configured to set the display color so that the display color of the overlapping period of the plurality of trend graphs determined to be overlapped by the overlap determining unit is different from the display color of the plurality of trend graphs And a display unit configured to display a trend graph according to display data for which the display color is set. Than is.

In addition, one configuration example of the trend graph display device of the present invention further includes a loss determination unit configured to determine a loss period of measurement data stored in the storage unit for each type of measurement data, and the display The data creation unit creates the display data so that the line of the trend graph is missing during the missing period when creating the display data.
Also, one configuration example of the trend graph display device of the present invention is a graph movement configured to change the display data so that a trend graph selected by an operator's operation among the plurality of trend graphs moves. And a scale configured to change the display data so that a scale on the vertical axis and a scale on the horizontal axis of the trend graph are newly displayed at positions corresponding to the movement of the selected trend graph. And a generation unit.
Further, in one configuration example of the trend graph display device of the present invention, the color arrangement determination unit is configured such that the vertical scale and the horizontal scale newly generated by the scale generation unit corresponding to the selected trend graph. Is set to the same color as the selected trend graph.

  According to the present invention, by setting the display color of the overlap period of a plurality of trend graphs determined to have overlap in the display to be different from the display color of the plurality of trend graphs, the operator The occurrence can be properly grasped, and the possibility that the operator overlooks the missing value can be reduced.

  Further, in this embodiment, the display data is changed so that the trend graph selected by the operation of the operator moves, and the scale on the vertical axis of the trend graph is changed to the corresponding position after the selected trend graph is moved. Since the display data is changed so that the scale on the horizontal axis is newly displayed, the operator can individually check the trend graph, and the visibility can be improved.

FIG. 1 is a block diagram illustrating a configuration of a control system according to an embodiment of the present invention. FIG. 2 is a block diagram illustrating the configuration of the server computer and the trend graph display device of the control system according to the embodiment of the present invention. FIG. 3 is a flowchart for explaining the operation of the server computer of the control system according to the embodiment of the present invention. FIG. 4 is a flowchart for explaining the operation of the trend graph display device of the control system according to the embodiment of the present invention. FIG. 5 is a diagram showing an example of the trend graph display in the embodiment of the present invention. FIG. 6 is a diagram showing an example of the trend graph display after the moving operation is performed in the embodiment of the present invention.

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a control system to which a trend graph display device according to an embodiment of the present invention is applied.
The control system controls process variables such as flow rate and pressure based on the measurement data obtained by the flow meter 1, the pressure meter 2, the flow meter 1 and the pressure meter 2, and the measurement data is transferred to the control system network 4. The control device 3 to be transmitted, the control system gateway (GW) 5 for sending the measurement data transmitted from the control device 3 to the host system network 6, and the control by the control device 3 are monitored or the control device 3 is instructed. The control man-machine apparatus 7 for this, the server computer 8 which collects the measurement data transmitted from the control apparatus 3, and the trend graph display apparatus 10 which performs the trend graph display of measurement data are comprised.

  Since the present invention is intended for display of collected measurement data, it can be applied regardless of the control method and the type of process variable. Therefore, in FIG. 1, only typical sensors such as the flow meter 1 and the pressure gauge 2 are described, and description of valves, heaters, and the like controlled by the control device 3 is omitted.

  FIG. 2 is a block diagram showing the configuration of the server computer 8 and the trend graph display device 10. The server computer 8 includes a collection unit 80 that collects measurement data, a storage unit 81 that stores the collected measurement data, a search unit 82 that retrieves measurement data requested from the trend graph display device 10, and the retrieved measurement. The transmitter 83 is configured to transmit data to the trend graph display device 10.

  The trend graph display device 10 stores an operation reception unit 100 that receives an operation from an operator, a data request unit 101 that requests measurement data from the server computer 8, and a plurality of types of measurement data acquired from the server computer 8. Storage unit 102, loss determination unit 103 that determines the loss period of measurement data stored in storage unit 102 for each type of measurement data, and display of a trend graph that visualizes the transition of measurement data for each type of measurement data A display data creation unit 104 that creates data, an overlap determination unit 105 that determines whether or not there is a display overlap in a plurality of trend graphs, a color arrangement determination unit 106 that sets the display color of a trend graph, a liquid crystal panel, and the like Display unit 107 including the display device and the trend graph selected by the operator's operation A graph moving unit 108 that changes display data so as to move, and a scale that changes display data so that a scale on the vertical axis and a scale on the horizontal axis are newly displayed at the corresponding positions after the movement of the selected trend graph. And a generation unit 109.

  FIG. 3 is a flowchart for explaining the operation of the server computer 8. The collection unit 80 of the server computer 8 collects measurement data from the control device 3 through the control system GW5 (step S100 in FIG. 3). The collection unit 80 stores the collected measurement data in the storage unit 81 of the server computer 8 (step S101 in FIG. 3).

When there is a data request from the trend graph display device 10 as described later (YES in step S102 in FIG. 3), the search unit 82 of the server computer 8 stores measurement data that matches the data request in the storage unit 81. Search is performed from the measured data (step S103 in FIG. 3).
The transmission unit 83 of the server computer 8 transmits the measurement data searched by the search unit 82 to the trend graph display device 10 via the host system network 6 (step S104 in FIG. 3).

  The server computer 8 repeats the processes in steps S100 to S104 as described above until the operation of the control system ends (YES in step S105 in FIG. 3).

  Next, the operation of the trend graph display device 10 will be described with reference to FIG. The operation receiving unit 100 of the trend graph display device 10 receives an operation from an operator who uses the trend graph display device 10 via an input device (not shown) such as a mouse or a keyboard.

  When the operation accepting unit 100 receives a trend graph display request from the operator (YES in step S200 in FIG. 4), the data request unit 101 of the trend graph display device 10 sends measurement data corresponding to the display request to the server computer 8. (Step S201 in FIG. 4). The request information sent by the data request unit 101 includes information specifying the type of measurement data requested by the operator to display the trend graph, the display target period (measurement date and time) of the measurement data, and the like. In the present embodiment, since it is assumed that a plurality of trend graphs are displayed at the same time, a plurality of types of measurement data are requested from the server computer 8 here.

The operation of the server computer 8 in response to the data request from the data request unit 101 is as described in steps S102 to S104 in FIG.
The data request unit 101 stores the measurement data transmitted from the server computer 8 in response to its own request in the storage unit 102 of the trend graph display device 10 (step S202 in FIG. 4).

  Next, the loss determination unit 103 of the trend graph display device 10 determines, for each type of measurement data, whether the measurement data stored in the storage unit 102 has a missing value (step S203 in FIG. 4). For example, when the measurement time interval between two measurement data adjacent on the time axis is longer than a predetermined time threshold, the loss determination unit 103 determines that there is a missing value between the two measurement data. Here, the time threshold value may be a value obtained by multiplying an average value of measurement time intervals of past measurement data by a magnification α (α is a value larger than 1), or measurement of the two previous measurement data. A value obtained by multiplying the time interval by the magnification α may be used. If the missing determination unit 103 determines that there is a missing value between two pieces of measurement data adjacent on the time axis, the missing period is defined as a period between the two measurement data. The defect determination unit 103 performs the above processing for each type of measurement data.

  Subsequently, the display data creation unit 104 of the trend graph display device 10 creates display data of a trend graph (line graph) that visualizes the transition of the measurement data stored in the storage unit 102 for each type of measurement data ( FIG. 4 step S204). At this time, the display data creation unit 104 interpolates the measurement data discrete on the time axis to connect the measurement data with a straight line or a curve, but between the measurement data determined by the loss determination unit 103 as the loss period, Do not perform interpolation and do not draw graph lines. Therefore, in the trend graph in which the missing value exists in the measurement data, the line is temporarily interrupted at the missing value portion. Examples of the interpolation processing include linear interpolation and spline interpolation.

The display data creation unit 104 may automatically determine the overlapping order of the trend graphs according to a predetermined order rule, or may determine according to the designation from the operator. Further, the display data creation unit 104 sets the vertical axis of the trend graph as the value of measurement data and the horizontal axis as time. At this time, the display data creation unit 104 automatically determines the scale range and scale interval on the vertical axis for each type of measurement data based on the minimum and maximum values of the measurement data, and is common to all measurement data. The scale range and the scale interval on the horizontal axis may be automatically determined based on the minimum value and the maximum value in all measurement data. Further, the display data creation unit 104 may determine the scale range and the scale interval on the vertical axis and the horizontal axis in accordance with designation from the operator.
The display data creation unit 104 performs the above processing for each type of measurement data.

  Next, the duplication determination unit 105 of the trend graph display device 10 determines whether or not there is a display overlap (plot points with the same coordinates) in the trend graph for each type of measurement data created by the display data creation unit 104. (Step S205 in FIG. 4).

  The color arrangement determining unit 106 of the trend graph display device 10 sets the display data color so that the display color of each trend graph is different for each type of measurement data (step S206 in FIG. 4). The display color may be automatically determined according to a predetermined color arrangement rule, or may be determined according to an instruction from the operator.

  Further, when it is determined that at least two trend graphs among the trend graphs have overlapping display (YES in step S205), the color arrangement determining unit 106 sets the display color described in step S206 and overlaps the display. The color of the display data is set so that the display color of the overlapping period of the plurality of trend graphs determined to be different from the display color of the plurality of trend graphs (step S207 in FIG. 4).

  A driver (not shown) in the display unit 107 that receives the display data for which the display color is set by the color arrangement determination unit 106 drives a display device such as a liquid crystal panel based on the display data. Thus, information on the contents corresponding to the display data is displayed on the screen of the display unit 107 (step S208 in FIG. 4).

  FIG. 5 is a diagram showing an example of the trend graph display of the present embodiment. In FIG. 5, in order to make it easy to understand the difference in display color, the trend graph G1 is represented by a solid line, the trend graph G2 is represented by a broken line, and the overlapping period OP of the trend graphs G1 and G2 is represented by a dotted line. Then all the lines are fine. In FIG. 5, SX is a scale on the horizontal axis, and SY is a scale on the vertical axis.

  In the example of FIG. 5, the trend graph G1 is displayed in red, the trend graph G2 is displayed in, for example, blue on the screen 1070 of the display unit 107, and the overlapping period OP of the trend graphs G1 and G2 is the trend graphs G1 and G2. It is displayed in a different color (for example, purple).

  In the present embodiment, the trend graph can be moved in accordance with an instruction from the operator. The graph moving unit 108 of the trend graph display device 10 performs an operation for moving one trend graph by the operator (for example, a drag and drop operation with a mouse) (YES in step S209 in FIG. 4), and the selected trend graph is displayed. The display data is changed so as to move to the designated position (step S210 in FIG. 4).

  Then, the scale generation unit 109 of the trend graph display device 10 changes the display data so that the vertical and horizontal scales of the trend graph are newly displayed at the positions corresponding to the moved trend graph (see FIG. 4 step S211).

The duplication determination unit 105 performs the same processing as step S205 on the display data changed by the graph moving unit 108 and the scale generation unit 109 (step S212 in FIG. 4).
When it is determined that there is no overlap in the display of the trend graph (NO in step S212 in FIG. 4), the color arrangement determining unit 106 is the same as step S206 for the display data changed by the graph moving unit 108 and the scale generation unit 109. Processing is performed (step S213 in FIG. 4). Further, when it is determined that there is an overlapping display in at least two trend graphs (YES in step S212), the color arrangement determining unit 106 performs a step for the display data changed by the graph moving unit 108 and the scale generating unit 109. The same process as S207 is performed (step S214 in FIG. 4).

  The operation of the display unit 107 that has received the display data for which the display color is set is the same as in step S208. Thus, the display is switched, and the selected trend graph and the scales on the vertical and horizontal axes move to the positions designated by the operator (step S215 in FIG. 4).

  FIG. 6 is a diagram showing an example of the trend graph display after the moving operation is performed. In FIG. 6, the trend graph G2 selected by the operator is moved diagonally downward to the right, and the horizontal scale SX2 and the vertical scale SY2 of the trend graph G2 are newly generated and displayed correspondingly. Is shown.

  In order to make the correspondence between the trend graph and the scale easy to understand, the color arrangement determining unit 106 makes the scales SX2 and SY2 of the moved trend graph G2 the same color as the trend graph G2 during the processing of steps S213 and S214. It is preferable to set.

  The trend graph display device 10 repeatedly performs the processes in steps S200 to S215 as described above until the operation of the control system ends (YES in step S216 in FIG. 4).

  As described above, in this embodiment, by setting the display color of the overlapping period of the plurality of trend graphs determined to have overlapping in the display to be different from the display color of the plurality of trend graphs, The operator can appropriately grasp the occurrence of the overlap, and can reduce the possibility of the operator overlooking the missing value. That is, the operator can determine that a plurality of trend graphs are overlapped when the display color is changed. In addition, the operator determines that there is a missing value in at least one trend graph when the display color does not change in a portion that seems to overlap even though the trend graphs appear to overlap. be able to.

  Further, in this embodiment, the display data is changed so that the trend graph selected by the operation of the operator moves, and the scale on the vertical axis of the trend graph is changed to the corresponding position after the selected trend graph is moved. Since the display data is changed so that the scale on the horizontal axis is newly displayed, the operator can confirm by moving a desired trend graph. As a result, even when there is an overlap between a plurality of trend graphs, the trend graphs can be individually confirmed, and visibility can be improved. Further, by moving the trend graph, it can be easily compared with other trend graphs.

  Each of the server computer 8 and the trend graph display device 10 of the present embodiment is realized by a computer having a CPU (Central Processing Unit), a storage device, and an external interface, and a program for controlling these hardware resources. Can do. The CPU of each device executes the processing described in the present embodiment in accordance with a program stored in the storage device.

  The present invention can be applied to a technique for displaying measurement data in a graph.

  DESCRIPTION OF SYMBOLS 1 ... Flow meter, 2 ... Pressure gauge, 3 ... Control apparatus, 4 ... Control system network, 5 ... Control system gateway, 6 ... Host system network, 7 ... Control man-machine apparatus, 8 ... Server computer, 10 ... Trend graph display Device: 80 ... Collecting unit, 81 ... Storage unit, 82 ... Searching unit, 83 ... Transmitting unit, 100 ... Operation receiving unit, 101 ... Data requesting unit, 102 ... Storage unit, 103 ... Defect determination unit, 104 ... Display data creation , 105... Duplicate determination unit, 106... Color arrangement determination unit, 107... Display unit, 108.

Claims (4)

A storage unit configured to store a plurality of types of measurement data;
A display data creation unit configured to create display data of a trend graph visualizing the transition of the measurement data for each type of measurement data;
A duplication determination unit configured to determine whether or not there is an overlapping display in the plurality of trend graphs;
A different display color is set for each trend graph, and the display color of the overlapping period of the plurality of trend graphs determined to be overlapped by the overlap determination unit is different from the display color of the plurality of trend graphs. A color scheme determining unit configured to set a display color;
A trend graph display device, comprising: a display unit configured to display a trend graph according to display data for which the display color is set. The trend graph display device according to claim 1,
A deficiency determination unit configured to determine a deficiency period of measurement data stored in the storage unit for each type of measurement data;
The display data creation unit creates the display data so that lines of the trend graph are missing during the missing period when creating the display data. In the trend graph display device according to claim 1 or 2,
A graph moving unit configured to change the display data such that a trend graph selected by an operator's operation moves among the plurality of trend graphs;
A scale generator configured to change the display data so that a scale on the vertical axis and a scale on the horizontal axis of the trend graph are newly displayed at positions corresponding to the movement of the selected trend graph; A trend graph display device further comprising: The trend graph display device according to claim 3,
The color arrangement determination unit sets the vertical scale and the horizontal scale newly generated by the scale generation unit corresponding to the selected trend graph to the same color as the selected trend graph. Trend graph display device characterized by

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