JP2012226731A - Trend graph display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a trend graph display device capable of providing an operator with information useful for situation determination.SOLUTION: A trend graph display device 1 which displays prediction data obtained by a simulation on a time base as an extension of past and current trends comprises control means (prediction calculation unit 10, variation range prediction calculation unit 11, history DB 12, drawing and display control unit 13, display memory, and display parameter setting unit 16) for superimposing, on the prediction data, data about prediction accuracy calculated in association with the prediction data for a visual display.

Description

  The present invention displays a calculation result obtained by a simulator or the like as prediction data in a graph as an extension of past and present trends, and is particularly used in industrial control systems such as SCADA (Supervisory Control And Data Acquisition) and DCS (Distributed Control System) It is related with the trend graph display apparatus suitable for.

  In recent years, in petrochemical factories, petroleum refining factories, semiconductor device manufacturing factories, etc., plants have become diversified, large-scale and complicated. As a result, it is extremely difficult for an operator who operates the plant to operate the plant, that is, to operate a large number of devices, operation valves, controllers, and the like constituting the plant and to set process conditions related to them. Therefore, on behalf of the operator, the entire plant is comprehensively and cross-sectionally monitored and controlled, and the functions of a large number of devices, operation valves, controllers, etc. are automatically monitored, controlled and operated. DCS (Distributed Control System) has come to be frequently used.

  By the way, in the trend in the conventional DCS operation monitoring function, only past and present trends are displayed. For example, as disclosed in Patent Documents 1 and 2, in recent years, it has become possible to display a predicted trend of process data using a simulation technique. However, for example, as shown in FIG. 12, the predicted trend is to display a predicted value for the future by simulation on one trend graph as an extension from the past and current measured values.

  According to FIG. 12, the trend graph draws a value obtained by measuring a measurement value of a certain measurement object for each time as a point, connects the points with a line, and displays them in a form that is easy for the operator to see. In addition, management values such as an upper limit value and a lower limit value for the measurement item are displayed on the trend graph.

  Specifically, first, measurement values (actual measurement values) of measurement items to be displayed are acquired in time series and drawn on a graph. At that time, a point is plotted with the time of the measured value as the horizontal axis and the measured value as the vertical axis. Furthermore, by drawing a line between adjacent points in time series, drawing from the past measurement value to the current measurement value (■) is performed.

  Next, the future calculated value (●) is drawn on the trend graph, but the measured value for the measurement item is calculated for a plurality of times in one future prediction (simulation). In the case shown in FIG. 12, three points are calculated. In general, the future measurement value drawn on the trend graph is the future measurement value (for multiple times) calculated by a certain future prediction, and is connected to the future measurement value calculated at other times with a line. Do not draw with. In addition, the future measurement value has two types of time, one is the calculation execution time (the time when the calculation was performed), and the other one is the predicted data time (the time indicated by the calculated future calculation value) It is.

  Therefore, when drawing future calculated values on the trend graph, multiple predicted data times based on the calculation execution time (current time) for the measurement item specified by the operator and the predicted values as points, Draw by connecting a line between adjacent points. At that time, the actual measurement value and the future measurement value are often displayed in a superimposed manner.

JP-A-2-41506 JP 2010-26842 A

  By the way, the calculation result by the simulator is only a guess, and the process data does not always change as 100% guess. For this reason, the operator needs to determine the situation after knowing to what extent the simulation result may change the prediction. However, in the conventional trend expression, there is no method for transmitting the certainty of the fluctuation range of the predicted calculation result. For this reason, the operator cannot accurately estimate the situation that may occur in the near future and take a countermeasure in advance, and therefore cannot avoid danger in advance and production loss.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a trend graph display device that can give useful information to an operator for situation determination.

  In order to solve the above-described problems, a trend graph display device according to a first aspect of the present invention is a trend graph display device that displays prediction data obtained by simulation on the time axis as an extension of past and current trends. And control means for visually displaying the prediction data superimposed on the prediction accuracy data calculated in relation to the prediction data.

  According to the present invention, the control means visually displays the prediction data obtained by the simulation by superimposing data relating to the prediction accuracy calculated in relation to the prediction data. For this reason, it is possible not only to display the prediction data on the time axis as an extension of the past and current trends, but also to display the prediction accuracy so that the operator can predict the situation for judgment of the situation. Can provide useful information with accuracy,

  In the present invention, the control means displays on the time axis a prediction upper limit value indicating an upper limit value of a prediction fluctuation range in consideration of the prediction accuracy and a prediction lower limit value indicating a lower limit value of the prediction fluctuation range. Features. According to the present invention, the prediction accuracy is displayed in the prediction fluctuation range including the upper limit value and the lower limit value, so that the operator can visually know how much the simulation result may be blurred. Can be made.

  In the present invention, the control means includes calculation means for calculating the prediction data and a prediction fluctuation range in consideration of the prediction accuracy, and display means for superimposing the prediction data on the prediction fluctuation range on a screen. It is characterized by having. According to the present invention, the calculation means calculates the prediction data together with the predicted fluctuation range, and the display means that receives the calculation data displays the prediction data superimposed on the prediction fluctuation range on the screen. For this reason, it is possible to provide the operator with a material for judging the accuracy of the predicted data. As a result, the operator can accurately estimate the situation that may occur in the near future and take action in advance. Avoidance and production loss can be avoided.

  In the present invention, the display means includes a region surrounded by a line in which a prediction upper limit value indicating the prediction fluctuation range is plotted on the time axis and a line in which the prediction lower limit value is plotted on the time axis. The drawing is performed by performing color processing different from that for other areas. According to the present invention, by performing color processing on the area surrounded by the line indicating the prediction upper limit value and the line indicating the prediction lower limit value of the prediction data, the operator can reduce the fluctuation of the prediction data centered on the prediction data. The possibility can be grasped intuitively.

  In the present invention, the display means is characterized by performing a gradation process for varying the color intensity from a predicted execution time to a future time on the time axis. According to the present invention, for example, the operator can intuitively grasp the opacity of the predicted data by expressing the color closer to the predicted execution time with a lighter color and a darker color toward the future time. .

  In the present invention, the display means is a region sandwiched between a line in which the prediction upper limit value is continuously plotted on the time axis and a line in which the prediction lower limit value is continuously plotted on the time axis. The display transparency is set to the above, or the prediction data including the region is drawn on the lowermost layer. According to the present invention, the operator can set the display transparency in the area surrounded by the line indicating the prediction upper limit value and the line indicating the prediction lower limit value of the prediction data, or display the display transparency in the lowermost layer. It is possible to evaluate while comparing with the predicted data without losing sight of the actually measured value displayed later or with the passage of time.

  In the present invention, the display means is further characterized in that the management data of the measurement item is drawn superimposed on the time axis. According to the present invention, since the management data of the measurement item is also displayed, the operator can consider the correspondence while comparing the prediction data with the management data, so that convenience is obtained.

  In the present invention, the display means plots the prediction upper limit value indicating the prediction variation range in a time series within a region surrounded by a line plotted in time series and the prediction lower limit value plotted in a time series. The prediction data line is used as a gradation reference line, and the gradation data is darkened as it approaches the reference line and becomes lighter as it approaches the prediction upper limit value or the prediction lower limit value. It is characterized by expressing the blur due to the prediction accuracy. According to the present invention, the prediction data can be represented on the trend graph as a distribution map, and at this time, the higher the possibility that the actual measurement value is drawn, the deeper the color is expressed, thereby allowing the operator to predict the prediction data. It is possible to intuitively grasp the shake caused by

  In the present invention, the display means plots the prediction data calculated for each set condition by the computing means on the time axis for each condition, compares the values at the same time for each condition, and is large. One of the prediction data is used instead of the prediction upper limit value, the smaller one is used as the change of the prediction lower limit value, and a region sandwiched between the line instead of the prediction upper limit value and the line instead of the prediction lower limit value By performing color processing different from the area, the blur of the prediction data for each set condition is expressed. According to the present invention, the fluctuation of the side data due to the difference in conditions can be expressed by displaying on the trend graph the prediction fluctuation range that can be taken when the prediction data is calculated under a plurality of conditions.

  In order to solve the above-described problems, a trend graph display device according to a second aspect of the present invention is a trend graph display device that displays a calculation result by a simulator as prediction data in a graph as an extension of past and current trends. In addition to the prediction data, the calculation means for calculating the prediction result of the fluctuation range of the prediction data together with its accuracy, and the prediction result of the fluctuation range by the calculation means are superimposed on the graph according to the accuracy on the screen. And a display means for displaying.

  According to the present invention, the calculation means calculates the prediction of fluctuation range of the prediction data in addition to the prediction data together with the accuracy, and the display means receiving the calculation displays the fluctuation range prediction on the screen by superimposing the prediction by the accuracy. To do. For this reason, the operator can obtain useful information for judging the situation simply by looking at the screen, and it is necessary to judge the situation after knowing to what extent the result of the simulation may cause a prediction blur. Disappears. Therefore, the operator can accurately estimate the situation that may occur in the near future and take measures in advance, and as a result, it is possible to avoid danger in advance and production loss.

  In this invention, the said display means displays the prediction result of the fluctuation range of the said prediction data by the display form different from the trend which shows the said prediction data, It is characterized by the above-mentioned. According to the present invention, the display unit highlights the prediction result of the fluctuation range of the prediction data by, for example, color, shading, painting, or the like. In this way, by displaying the prediction result of the fluctuation range in a display form different from the trend of the prediction data, the operator can watch the fluctuation range prediction, and therefore has an opportunity to miss useful information for situation judgment. decrease.

  In this invention, the said display means displays the prediction result of the fluctuation range of the said prediction data with a different display form according to accuracy. According to the present invention, since the prediction result of the fluctuation range of the prediction data is displayed in different display forms depending on the accuracy, the operator can easily recognize useful information for situation determination.

  In the present invention, the display means approximates the prediction result of the fluctuation range of the prediction data by a straight line, and displays a curve indicating the prediction data surrounded by the straight line. According to the present invention, since the prediction data is enclosed and displayed by the prediction result of the fluctuation range that is linearly approximated, the operator can intuitively recognize the variation in the prediction, and the prior response is facilitated.

  In the present invention, the display means is characterized in that a comment indicating a factor of fluctuation is further superimposed and displayed on the prediction result of the fluctuation range of the prediction data. According to the present invention, more accurate information can be notified to the operator by adding a comment in addition to the predicted data fluctuation range.

  In the present invention, the display means displays the prediction result of the fluctuation range corresponding to the accuracy information separately from the prediction result of the other fluctuation range based on accuracy information set from the outside. According to the invention, when the operator sets accuracy information, the prediction result of the variation range according to the accuracy is displayed separately from the variation range according to other accuracy, so that the visibility is improved and the usability is improved. To do.

  In the present invention, the display means controls display / non-display of a prediction result of a fluctuation range of the prediction data output from the prediction calculation unit based on a command set from the outside. According to the present invention, it is possible to control whether or not to display the prediction result of the fluctuation range of the prediction data for the convenience of the operator, so that the usability is improved.

  ADVANTAGE OF THE INVENTION According to this invention, the trend graph display apparatus which can give useful information for a situation judgment to an operator can be provided.

It is a block diagram which shows the structure of the trend graph display apparatus which concerns on Embodiment 1 of this invention. It is a flowchart which shows the basic operation | movement of the trend graph display apparatus which concerns on Embodiment 1 of this invention. It is a figure which shows an example of the screen display of the trend graph display apparatus which concerns on Embodiment 1 of this invention. It is a flowchart which shows the detailed procedure of the drawing of the trend graph display apparatus which concerns on Embodiment 1 of this invention, and a display process. It is a flowchart which shows the detailed procedure (1) of the future measured value drawing process of the trend graph display apparatus which concerns on Embodiment 1 of this invention. It is a flowchart which shows the detailed procedure (2) of the future measured value drawing process of the trend graph display apparatus which concerns on Embodiment 1 of this invention. FIG. 5 is a table showing an example of (a) measured values, (b) predicted fluctuation ranges, and (c) management values exemplified to explain the operation of the trend graph display device according to the first embodiment of the present invention. is there. It is a figure which shows the other example of the screen display of the trend graph display apparatus which concerns on Embodiment 1 of this invention. It is a figure which shows the further another example of the screen display of the trend graph display apparatus which concerns on Embodiment 1 of this invention. It is a flowchart which shows the detailed procedure of the drawing and display process of the trend graph display apparatus which concerns on Embodiment 2 of this invention. It is a figure which shows an example of the screen display of the trend graph display apparatus which concerns on Embodiment 2 of this invention. It is a figure which shows the other example of the screen display of the trend graph display apparatus which concerns on Embodiment 2 of this invention. It is a figure which shows an example of the screen display by the conventional trend graph display apparatus.

  Hereinafter, an embodiment for carrying out the present invention (hereinafter simply referred to as the present embodiment) will be described in detail with reference to the accompanying drawings.

Embodiment 1. FIG.
FIG. 1 is a block diagram illustrating a configuration of the trend graph display device according to the first embodiment. According to FIG. 1, the trend graph display device 1 according to the present embodiment includes a prediction calculation unit 10, a fluctuation range prediction calculation unit 11, a history DB (12), a drawing / display control unit 13, and a display memory 14. And a display unit 15 and a display parameter setting unit 16.

  The prediction calculation unit 10 generates a prediction trend graph as an extension of the past and current trends from the prediction data obtained by the simulation, and outputs the prediction trend graph to the drawing / display control unit 13. The fluctuation range prediction calculation unit 11 generates a plurality of fluctuation range prediction trend graphs indicating the fluctuation range of the prediction trend graph separately from the prediction trend graph generated by the prediction calculation unit 10, and sends the fluctuation range prediction trend graph to the drawing / display control unit 13. Output.

  The history DB (12) is a database in which measured values of processes collected in advance or values calculated by KPI (Key Performance Indicator) are stored. The prediction calculation unit 10 obtains prediction data by referring to past and current measurement values stored in time series in the history DB (12), and obtains prediction data from the prediction data as an extension of past and current trends. Create a predictive trend graph for the book. The fluctuation range prediction calculation unit 11 further performs a simulation with reference to the past and present measurement values stored in time series in the history DB (12), thereby showing a fluctuation range prediction trend graph indicating the fluctuation range of the prediction data. Are generated together with the probability and output to the drawing / display control unit 13.

  Therefore, the prediction calculation unit 10, the fluctuation range prediction calculation unit 11, and the history DB (12) operate in cooperation to calculate “prediction data and the prediction fluctuation range in consideration of the prediction accuracy. Functions as a calculation means.

  The drawing / display control unit 13 superimposes the prediction trend graph generated by the prediction calculation unit 10 in a form surrounded by the fluctuation range prediction trend graph generated by the fluctuation range prediction calculation unit 11, and displays the display data. As shown in FIG. The drawing / display control unit 13 further displays the display data drawn in the display memory 14 on the display unit 15 by reading the display data in synchronization with the display timing of the display unit 15. The display unit 15 is a display monitor such as an LCD (Liquid Crystal Display Device) or an OLED (Organic Electro-Luminescence Display Device: organic EL).

  The display parameter setting unit 16 outputs, for example, parameters relating to color and gradation, which are set and input by the user from an input device (not shown) from the outside, to the drawing / display control unit 13. Control of display data drawn in the display memory 14 is performed. For this reason, the drawing / display control unit 13, the display memory 14, the display unit 15, and the display parameter setting unit 16 operate in cooperation, so that “the prediction data is superimposed on the prediction variation range and the screen is displayed. Functions as a display means.

  In addition, the prediction calculation unit 10, the fluctuation range prediction calculation unit 11, the history DB (12), the drawing / display control unit 13, the display memory 14, and the display parameter setting unit 16 operate in cooperation. Thus, it functions as a control means that “predicted data is visually displayed by superimposing data relating to prediction accuracy calculated in relation to the predicted data”. This control means displays, for example, the trend graph shown in FIGS. 3A and 3B on the display unit 15, and includes past and present measurement values, prediction data indicating future measurement values, and prediction. A prediction upper limit value indicating the upper limit value of the prediction fluctuation range in consideration of accuracy and a prediction lower limit value indicating the lower limit value of the prediction fluctuation range are displayed on the time axis.

  The basic operation of the trend graph display device 1 according to the first embodiment will be described below with reference to the flowchart shown in FIG. The prediction calculation unit 10 first reads the history of measurement values of the past and the current process stored in time series in the history DB (12) by the size of a preset time constant (step S11). Then, future prediction is performed by simulation, past and current trends are created from the obtained prediction data, one prediction trend graph is generated as an extension thereof, and is output to the drawing / display control unit 13 (step S12). . Here, in creating the prediction trend graph, the prediction calculation unit 10 calculates the moving average of the data for the immediately preceding n plots for every n plots (n is an arbitrary integer) determined by the set time constant, Alternatively, a predicted trend graph is created by smoothing by the least square method.

  Next, the fluctuation prediction range calculation unit 11 calculates a prediction upper limit value that indicates the upper limit value of the prediction fluctuation range in consideration of prediction accuracy, and is calculated in relation to the prediction data generated by the prediction calculation unit 10. Data relating to the prediction accuracy including the prediction lower limit value indicating the lower limit value is output to the drawing / display control unit 13 (step S13). In response to this, the drawing / display control unit 13 reflects the parameter input via the parameter setting unit 16 and superimposes the data related to the prediction accuracy calculated in relation to the prediction data on the prediction data. Display visually. Specifically, the drawing / display control unit 13 is surrounded by prediction data and a line in which the prediction upper limit value indicating the prediction variation range is plotted on the time axis and a line in which the prediction lower limit value is plotted on the time axis. The display data is generated by performing color processing different from that for the other areas on the displayed area and rendered on the display memory 14. Then, the display data drawn in the display memory 14 is read out in synchronization with the display timing of the display unit 15 to be displayed on the display unit 15 in a desired form.

  Here, a configuration of a screen displayed by the trend graph display device 1 according to the first embodiment will be described with reference to FIGS. In FIGS. 3A and 3B, the symbol a is a measurement value scaled on the vertical axis of the trend graph, the symbol b is a time scaled on the horizontal axis of the trend graph, and a symbol c is an object for drawing the measurement value on the trend graph. Each of the measurement items is shown. The symbol d is a point representing (time, measured value) drawn on the trend graph, and the symbol e is a line connecting a point drawn on the trend graph and a point adjacent in time series.

  Reference sign f is an upper limit value that the measurement item can take as a management value (upper limit value), and reference sign g is a lower limit value that the measurement item can take as a management value (lower limit value). A symbol h is a calculation execution time when the future prediction is performed, and becomes a base point for calculating and drawing a future measurement value. The symbol i is an actually measured value of the measurement item c, and the symbol j is an actual measurement value drawn later, which is calculated at the calculation execution time g and is longer than the drawn future measurement value k. This is an actually measured value that is later in the acquisition and drawing timing. The symbol k is a future measurement value, which is a calculation value obtained by predicting the value of the measurement item c in the future for a plurality of hours from the situation at the calculation execution time h.

  Symbol l is a future calculated value prediction upper limit value, and indicates a measured value when the future measured value calculated from the future calculated value k and the prediction accuracy swings to the top. Symbol m is a future measurement prediction lower limit value, and indicates a measurement value when the future measurement value calculated from the future measurement value k and the prediction accuracy swings to the lowest. The symbol n is a line of the future measurement value, and indicates a line connecting the point of the future measurement value k and the point adjacent to the time series. The symbol o is a line of the future measurement value prediction upper limit value, and shows a line connecting points adjacent to each other in the time series between the points of the future measurement value prediction upper limit value l.

  A symbol p is a line of the future measurement value prediction lower limit value, and indicates a line connecting points adjacent to the time series between the points of the future measurement value prediction lower limit value m. A symbol q is an area sandwiched between a future measurement value prediction upper limit line o and a future measurement value prediction lower limit p, and is a target of coloring processing.

  Reference symbol r is a management value arrival prediction time, and indicates a time at which the management value g intersects with a line n of a future measurement value. The symbol s is the management value shortest predicted arrival time, and indicates the time at which the management value g intersects with the future measurement value prediction upper limit line o. The symbol t is the management value longest arrival prediction time, and indicates the time at which the management value f or g intersects the future measurement value prediction lower limit line p.

  A symbol u is a lowermost drawing area, and indicates an area to be drawn on the lowermost layer on the trend graph. Vertical axis, horizontal axis, future measurement value k, future measurement value prediction upper limit l, future measurement value prediction lower limit m, future measurement value line n connecting them, future measurement value prediction upper limit line o, the future measurement value prediction lower limit line p, and the region q sandwiched between the future measurement value prediction lower limit value and the future measurement value prediction lower limit value are drawn in the lowermost layer. A symbol v is a drawing area drawn later or an upper layer drawing area, a point and a line drawn on the lowermost drawing area u, an actual measurement value j drawn later, and an actual measurement value line w drawn later. Etc. are drawn in this area.

  Hereinafter, the drawing processing operation of the trend graph display device 1 according to the first embodiment shown in FIG. 1 will be described in detail with reference to the drawing processing flowcharts shown in FIG. 4 and FIGS. 5A and 5B. Here, it is assumed that the actual measurement value shown in FIG. 6A and the future measurement value shown in FIG. 6B are obtained for the measurement item c, and how it is drawn on the trend graph. Will be explained.

  The drawing / display control unit 13 draws the measurement value axis, the time axis, and the label on the trend graph, with the measurement value a on the vertical axis and the time b on the horizontal axis. Further, “measurement item 1” is drawn as the name of the measurement item c and displayed on the trend graph screen (step S101). Subsequently, the management values f and g of the measurement item 1 to be displayed are drawn on the trend graph in parallel with the time axis c (step S102).

  Next, the drawing / display control unit 13 is the measurement value of the measurement item 1 from the designated past time (0.9: 50: 50) to the current time (10:00:00) (0.9: 59: 50,80 ), (10: 00: 00,90) are plotted on the trend graph and connected by a line (step S103), and the latest measured value is copied to the previous value buffer to perform actual measurement. An initial display process for displaying values in time series is executed (step S104). The “previous value buffer” is one of registers built in the drawing / display control unit 13 and assigned for copying by the drawing / display control unit 13. Here, the “previous value” point buffer, “previous value buffer” A point buffer for the prediction upper limit value of “value” and a point buffer for the prediction lower limit value of “previous value” are prepared.

  Immediately after the completion of the initial display process, for example, when the operator requests a future measurement value drawing process based on the measurement value at the current time (10:00:00) (step S105 “YES”), the drawing / display control unit 13 Performs the future measurement value rendering process (step S106) shown in the flowcharts of FIGS. 5A and 5B.

  5A and 5B, the drawing / display control unit 13 first acquires a simulation result of a future measurement value starting from the calculation execution time from the prediction calculation unit 10 (step S201). Here, as shown in FIG. 2 (b), the present time (10:00:00) is calculated as the calculation execution time h, and the future measurement values k are calculated as five values at intervals of 10 seconds. Then, the drawing / display control unit 13 stores the measurement value (10:00:00, 90) at the calculation execution time h (10:00:00) in the “previous value” point buffer and the calculation execution time h (10: The measured value (10: 00: 00,90) at 00:00) is stored in the point buffer of the predicted upper limit value of “previous value” and the measured value (10: 00: 00.90) at the calculation execution time h (10:00:00) ) As the latest values in the point buffer of the predicted lower limit value of “previous value” (step S202).

  Next, the drawing / display control unit 13 confirms that drawing processing has not been completed for all future measurement values (step S203 “NO”), and among the undrawn values of the future measurement values The value closest to the calculation execution time is set as the “current value” point (step S205), and the “current error” is calculated using the prediction accuracy of “current value” (step S206). Here, the prediction accuracy is obtained by calculating back the error, and 0 is the minimum and 1.0 is the maximum. That is, the closer to 1.0, the closer to the actual measurement value that is predicted.

  If the “current value” is a positive number greater than or equal to 0 (“YES” in step S207), the drawing / display control unit 13 sets the processing of (10: 00: 10,100) as the “current value” point, and 100− The prediction accuracy is 5%, 100 × (1.00 + 5) = 105.0 is the prediction upper limit l of the future measurement value (step S208), and 100 × (1.00-5) = 95.0 is the prediction lower limit value of the future measurement value. As m (step S209), the point of “current value”, that is, the point k of the future measurement value (10: 00: 10,100) is drawn. Then, a drawing process for drawing the line n of the future measurement value between the “previous value” point (10:00:00, 90) is executed (step S210).

  Similarly, the point of the prediction upper limit value of “current value”, that is, the point 1 of the prediction upper limit value of the future measurement value (10:00:10, 105.0) is drawn. Then, a drawing process is performed to draw a prediction upper limit line o of the future measurement value between the “previous value” prediction upper limit point (10:00:00, 90) (step S211). Similarly, the point of the prediction lower limit value of “current value”, that is, the point l of the prediction lower limit value of the future measurement value (10: 00: 10,95.0) is drawn. Then, a drawing process of drawing a line p of the predicted lower limit value of the future measurement value between the “previous value” predicted lower limit point (10:00:00, 90) is executed (step S212).

  Subsequently, the drawing / display control unit 13 stores the “current value” point (10: 00: 10,100) in the “previous value” point buffer and the “current value” predicted upper limit point (10: 00: 10,105.0). ) To the “previous value” forecast upper limit point buffer, and “current value” forecast lower limit point (10: 00: 10,95) to the “previous value” forecast lower limit point buffer. In preparation for the subsequent repetitive processing (step S213).

  That is, the drawing / display control unit 13 returns to the process of step S203, confirms that drawing of all future measurement values has not been completed (step S203 “NO”), and (10: 00: 20,110) When the current value is set as the “current value” point, and 100−prediction accuracy is 5%, 110 × (1.00 + 5) = 115.5 is set as the prediction upper limit l of the future measurement value (step S208), and 110 × ( 1.00-5) = 104.5 is set as the predicted lower limit m of the future measurement value (step S209), the point of “current value”, that is, the point k of the future measurement value (10:00:20, 110) is drawn. Then, a drawing process for drawing the line n of the future measurement value between the “previous value” point (10: 00: 10,100) is executed (step S210).

Similarly, the point of the prediction upper limit value of “current value”, that is, the point 1 of the prediction upper limit value of the future measurement value (10:00:20, 115.5) is drawn. Then, a drawing process is performed in which a line o of the predicted upper limit value of the future measurement value is drawn between the predicted upper limit point (10: 00: 10,105.0) of the “previous value” (step S211). Similarly, the point of the prediction lower limit value of “current value”, that is, the point m of the prediction lower limit value of the future measurement value (10:00:20, 104.5) is drawn. Then, a drawing process for drawing a line p of the predicted lower limit value of the future measurement value between the points of the predicted lower limit value of “previous value” (10: 00: 10,94.5) is executed (step S212).

  Subsequently, the drawing / display control unit 13 sets the “current value” point (10: 00: 20,110) in the “previous value” point buffer and the “current value” predicted upper limit point (10: 00: 20,115.0). ) To the “previous value” forecast upper limit point buffer and “current value” forecast lower limit point (10: 00: 20,94.5) to the “previous value” forecast lower limit point buffer. In preparation for the subsequent repetitive processing (step S213). The future measurement value rendering process from step S208 to step S213 described above is repeatedly executed until the rendering process for all future measurement values is completed.

  On the other hand, in the “current value” determination process in step S207, when “current value” is a negative number (step S207 “NO”), the drawing / display control unit 13 performs the process of (10: 00: 10,100). Is “current value” and 100−prediction accuracy is 5%, 100 × (1.00−5) = 95.0 is set as the prediction upper limit l of the future measurement value (step S214), and 100 × (1.00+ 5) = 105.0 is set as the predicted lower limit m of the future measurement value (step S215), and the point of “current value”, that is, the point k of the future measurement value (10: 00: 10,100) is drawn. Then, a drawing process for drawing the line n of the future measurement value between the “previous value” point (10:00:00, 90) is executed (step S210).

  Similarly, the point of the prediction upper limit value of “current value”, that is, the point 1 of the prediction upper limit value of the future measurement value (10:00:10, 105.0) is drawn. Then, a drawing process is performed to draw a prediction upper limit line o of the future measurement value between the “previous value” prediction upper limit point (10:00:00, 90) (step S211). Similarly, the point of the prediction lower limit value of “current value”, that is, the point l of the prediction lower limit value of the future measurement value (10: 00: 10,95.0) is drawn. Then, a drawing process for drawing a line p of the predicted lower limit value of the future measurement value between the “previous value” predicted lower limit point (10:00:00, 90) is executed (step S212).

  Subsequently, the drawing / display control unit 13 stores the “current value” point (10: 00: 10,100) in the “previous value” point buffer and the “current value” predicted upper limit point (10: 00: 10,105.0). ) To the “previous value” forecast upper limit point buffer, and “current value” forecast lower limit point (10: 00: 10,95) to the “previous value” forecast lower limit point buffer. Then, in preparation for the subsequent repetitive process, the process returns to the process of step S203 (step S213).

  When the drawing process for all future measurement values is completed (step S203 “YES”), the drawing / display control unit 13 sets the future measurement value prediction upper limit line o and the future measurement value prediction lower limit value. The gradation process is performed on the region q sandwiched between the line p and the color is changed from that of the other region for drawing (step S204). Here, as shown in FIG. 3 (a), drawing is performed with a lighter gradation near the calculation execution time h (10:00:00), or, as shown in FIG. Set or draw three-dimensionally on the bottom layer.

  Returning to FIG. When the above-described future measurement value drawing process ends (step S106), the drawing / display control unit 13 waits for the occurrence of a fixed-cycle event. Here, it is assumed that a periodic event occurs every 10 seconds. When the drawing / display control unit 13 detects the occurrence of this fixed-cycle event (step S107 “YES”), it acquires (10: 00: 10,102.0) as the latest measured value and sets it as the point j of the actual measured value ( 10: 00: 10,102.0) is drawn in a higher layer than the drawing of future measurement values.

  Here, the drawing / display control unit 13 determines the actual measurement value between the previous measurement value point (10: 00: 00,100) and the actual measurement value point (10: 00: 10,102.0). A drawing process for drawing the measurement value line x is executed (step S108). Then, the actual measured value point (10: 00: 10,102.0) of this time is copied to the previous value point buffer of the actual measured value (step 109). After the drawing process is completed, the drawing / display control unit 13 waits for a future measurement value display request by an operator input or a fixed-cycle event to occur, and when a fixed-cycle event occurs (step S107 “YES”), the latest actual (10: 00: 20,113.0) is acquired as a measured value of (10: 00: 20,113.0), and (10: 00: 20,113.0) is drawn as a point j of the actual measured value in a higher layer than drawing of the measured value of the future. That is, the drawing / display control unit 13 determines the actual measurement value between the previous measurement value point (10: 00: 10,102.0) and the actual measurement value point (10: 00: 20,113.0). A drawing process for drawing the line x is executed (step S108). Then, the actual measured value point (10:00:20, 113.0) of this time is copied to the previous value point buffer of the actual measured value, and the trend graph drawing process is terminated (step S109).

  Here, the calculation formula of the prediction upper limit value of the future measurement value and the prediction lower limit value of the future measurement value is (1.0−prediction accuracy) × future measurement value, but is limited to this calculation formula. In addition, when calculating the predicted upper limit value of the future measured value and the predicted lower limit value of the future measured value, another calculation formula can be applied.

  As shown in FIG. 3A, the above-described trend graph drawing process causes the display unit 15 to display the vertical axis on which the measurement value a is scaled, the horizontal axis on which the time b is scaled, and the name of the measurement item c. The line of the measurement item management values f and g, the point j of the actual measurement value of the measurement item from the drawing start time to the future measurement value drawing request time, and the trend graph connecting them are displayed. And on this trend graph, the point k of the future measurement value based on the calculation execution time h, the line n of the future measurement value, and the prediction upper limit value of the future measurement value based on the calculation execution time h l and the prediction upper limit line o of the future measurement value, the prediction lower limit point m of the future calculation value based on the calculation execution time h, the prediction lower limit line p of the future measurement value, and the future A region q sandwiched between a prediction upper limit line o of the measurement value and a prediction lower limit line p of the future measurement value is superimposed and displayed. The area is then color-changed and visually displayed so that the fluctuation range of future measurement values can be seen.

  The region q is drawn with gradation and becomes lighter as the calculation time is closer. Further, the transparency of the area q is set as shown in FIG. 3B, or is drawn on the lowermost layer, and when an actual measurement value is drawn thereafter, they are not hidden in the area. ing.

  Note that, according to the trend graph shown in FIG. 3B, the management value of the measurement item c (here, the upper limit) is obtained by the intersection of the actual calculation value point j after the calculation execution time h and the area and line indicated by the line v. The time at the intersection of the line of the value f and the future measurement value k becomes the predicted upper limit arrival prediction time (time r when the upper limit value is reached), and separately from this, the management value f of the measurement item c Between the line of the current line and the prediction upper limit l of the future measurement value, or the intersection of the line of the management value g of the measurement item c and the prediction lower limit m of the future measurement value, the earlier is the upper limit shortest predicted arrival time s In this case, since the intersection of the management value f of the measurement item c and the prediction upper limit line o of the future measurement value is earlier, s is the upper limit shortest arrival prediction time. Become.

  As described above, according to the trend graph display device 1 according to the first embodiment, the drawing / display control unit 13 not only draws the predicted value generated by the prediction calculation unit 10 but also predicts the fluctuation range. The prediction accuracy of the prediction value calculated by the calculation unit 11 is superimposed and displayed in the form of a prediction upper limit value and a prediction lower limit value surrounding the prediction value. As a result, it is possible to provide the operator with materials for determining the urgency and accuracy of future measurement values. For this reason, the operator does not grasp the fluctuation of urgency that is affected by the prediction accuracy after taking the accuracy into consideration for future measurement values, and therefore determines whether or not to deal with it. It can be carried out.

  Thus, the drawing / display control unit 13 draws the upper limit value f and the lower limit value g of the measurement item c in advance on the trend graph, and predicts the upper limit value l and the prediction lower limit value m of the future measurement value. The above-described effects can be obtained by simultaneously drawing the graph. In other words, by coloring and drawing the region q sandwiched between the prediction upper limit line and the prediction lower limit line of the future measurement value, the operator can predict the fluctuation of the prediction data centered on the future measurement value k. Intuitively grasp the possibilities. At that time, the opacity of the future measurement value k can be intuitively grasped by making the color closer to the current time (calculation execution time) a lighter color and making the color darker toward the future time. .

  Further, according to the trend graph display device 1 according to the present embodiment, when the region q sandwiched between the prediction upper limit line and the prediction lower limit line of the future measurement value is colored and drawn, the transparency of the colored portion is drawn. Is set to 50%, for example, or displayed at the lowermost layer, so that the operator does not have to worry about missing the point representing the actual measurement value j drawn in the same area or drawn later. Specifically, in the torrent graph, new actual measurement values are drawn with the passage of time. Even if the data is newly drawn in an area between the prediction upper limit value line and the prediction lower limit value line, the operator can compare the actual measurement value j with the future measurement value k, which is convenient for the operator. Can provide sex.

  Furthermore, according to the trend graph display device 1 according to the first embodiment, the operator visually recognizes the trend graph displayed on the display unit 15, so that not only the upper limit value arrival prediction time r but also the upper limit value shortest arrival time s. I can know. As a result, the operator can simultaneously know the average time and the shortest time remaining until the upper limit is reached, and can make an action plan that takes into account the shortest case.

  It should be noted that in order to express fluctuation due to the prediction accuracy of future measurement values, drawing of a measurable distribution method (pseudo distribution map) is also conceivable. In this case, as shown in the trend graph displayed on the display unit 15 in FIG. 7, the drawing / display control unit 13 draws the point k of the future measurement value, and points adjacent points in time series with the line p. Tie with. Then, the future measurement value line p is used as a reference for gradation, and the closer to the future measurement value line, the darker the color is drawn, and the closer to the prediction upper limit value l or the prediction lower limit value m, the lighter the drawing.

  In this way, by drawing future measurement values on the trend graph using the distribution possibility method, the color is expressed darker as the actual measurement value is more likely to be drawn. It can be recognized that the darker the expression, the higher the possibility that an actual measurement value is drawn.

  In addition, even when the fluctuation due to the prediction accuracy is not expressed when calculating the future measurement value, it may be desired to express the touch of the future measurement value on the trend graph. Specifically, when calculating future measurement values by calculation, a plurality of parameters such as outside air temperature, humidity, reaction rate, etc. actually exist as external factors. The values of these parameters are adjustment factors, and even when the values of these parameters are set, there are cases where it is desired to monitor each calculation result simultaneously on the trend graph.

  In expressing fluctuation due to the set value of the parameter of the future measurement value, for example, as shown in the trend graph displayed on the display unit 15 in FIG. 8, the drawing / display control unit 13 sets the point of the future measurement value. A plurality of types (A = A1, A = A2) of setting values for the parameter A at the time of determination are prepared, and future measurement values l and m are calculated for each setting value. Then, points d adjacent to each other in time series are connected by a line e. At that time, the prediction accuracy is not used for the calculation, and the lines k and l are drawn one for each of the set values A = A1 and A-A2. Then, the line l with the larger future measurement value is substituted for the prediction upper limit line, the line m with the smaller future measurement value is substituted for the prediction lower limit line, and the enclosed region q is colored. To draw differently from other areas.

  In this way, the range that can be taken when calculating the future measurement value under multiple conditions is drawn on the trend graph, the fluctuation of the future measurement value due to the difference in parameters is drawn, and the enclosed area is color-displayed I can do it. For this reason, by visually recognizing the difference in time at which the future measurement values l and m and the management value f of the measurement item c cross due to the parameter setting difference given to the prediction calculation unit 10, for example, s and t, It is possible to make an action plan taking into account the shortest case s.

Embodiment 2. FIG.
Next, a trend graph display device according to the second embodiment will be described. The second embodiment described below also has the same configuration as that of the first embodiment shown in FIG. 1 and executes the basic operation shown in FIG. However, the fluctuation range prediction calculation unit 11 indicates the probability of each of a plurality of fluctuation range prediction trend graphs indicating the fluctuation range of the prediction trend graph, separately from the prediction trend graph generated by the prediction calculation unit 10. It is generated together with the accuracy information and output to the drawing / display control unit 13. Here, the probability calculated by the fluctuation range prediction calculation unit 11 is used as the accuracy information. Further, the display parameter setting unit 16 is a parameter that is set and input from the outside by, for example, an input device (not shown), such as ON / OFF of a fluctuation range prediction trend graph, accuracy information, necessity of comment display, and the like Is output to the drawing / display control unit 13 and the display data drawn in the display memory 14 by the drawing / display control unit 13 is controlled.

  For example, when the display parameter setting unit 16 sets display of the fluctuation range prediction trend graph ON, the drawing / display control unit 13 permits the display of the fluctuation range prediction trend graph and causes the display memory 14 to display the prediction trend. When the display data in which the graph and the fluctuation range prediction trend graph are superimposed are drawn and the fluctuation range prediction trend graph OFF is set, the display of the fluctuation range prediction trend graph is hidden in the display memory 14 and only the prediction trend graph is displayed. draw. When the accuracy information is set by the parameter setting unit 16, the drawing / display control unit 13 distinguishes the fluctuation range prediction trend graph based on the set accuracy information from other fluctuation range prediction trends, and displays the prediction trend graph. The image is superimposed and drawn on the display memory 14. When a parameter that requires comment display is set by the parameter setting unit 16, the drawing / display control unit 13 superimposes a comment based on the set parameter on the vicinity of the fluctuation range prediction trend graph and displays the display memory 14. To draw.

  For this reason, according to the trend graph display device 1 according to the second embodiment, the prediction calculation unit 10 and the fluctuation range prediction calculation unit 11 indicate that “in addition to the prediction data, the prediction result of the fluctuation range of the prediction data is As the calculation means that calculates with accuracy, the drawing / display control unit 13, the display memory 14, and the display unit 15 may superimpose the prediction result of the variation range by the calculation unit on the graph according to the accuracy. Function as display means.

  FIG. 9 is a flowchart showing the drawing processing operation of the trend graph display device 1 according to the second embodiment. FIGS. 10A, 10B, and 11C, and FIGS. 11A, 11B are prediction trend graphs and fluctuations displayed on the screen by the trend graph display device 1 according to the second embodiment. It is a figure which shows an example of a range prediction trend graph. Hereinafter, the operation of the trend graph display device 1 according to the second embodiment will be described in detail with reference to FIGS. 9 to 11.

  The prediction calculation unit 10 first reads the history of measured values of the past and the current process stored in time series in the history DB (12) by the size of a preset time constant, and performs future prediction by simulation. In addition to the prediction trend graph generated by the prediction calculation unit 10, the fluctuation range prediction calculation unit 11 generates a fluctuation range prediction trend graph indicating the fluctuation range of the prediction trend graph together with the accuracy information. Then, the drawing / display control unit 13 acquires the future prediction by the prediction calculation unit 10, the fluctuation prediction range by the fluctuation range prediction calculation unit 11, and the accuracy information (step S301).

  If the fluctuation range prediction display parameter input via the parameter setting unit 16 is OFF (step S302 “NO”), the drawing / display control unit 13 hides the fluctuation range prediction trend graph and performs prediction calculation. Only the predicted trend graph generated by the unit 10 is drawn on the display memory 14 and displayed on the display unit 15 (step S304). For this reason, only the normal prediction trend graph without the fluctuation range prediction trend graph shown in FIG. 12 as a conventional example is displayed on the display unit 15.

  On the other hand, when the fluctuation prediction range display parameter is ON in the parameter setting determination process in step S302 (step S302 “YES”), the drawing / display control unit 13 further inputs via the parameter setting unit 16. The comment request display parameter to be turned on / off is determined (step S303). If the comment request display parameter is OFF (step S303 “NO”), the drawing / display control unit 13 adds the prediction calculation unit 10 to the fluctuation range prediction trend graph generated by the fluctuation range prediction calculation unit 11. The display data to which the predicted trend graph generated by the above is added is drawn on the display memory 14 and displayed on the display unit 15 (step S305).

  An example of the screen configuration displayed on the display unit 15 at this time is shown in FIGS. 10 (a), 10 (b), and 10 (c). According to FIG. 10 (a), two sets of fluctuation range prediction trend graphs RG # 1 and RG # 2, each of which fluctuates in the ± direction, are displayed with probability in a form surrounding one prediction trend graph SG. The Here, a fluctuation range prediction trend graph RG # 1 with probability A (70%) and a fluctuation range prediction trend graph RG # 2 with probability B (80%) are illustrated. As shown in FIGS. 10B and 10C, the two sets of fluctuation range prediction trend graphs RG # 1 and RG # 2 are approximated by a straight line so as to be distinguished from the prediction trend graph SG. Visibility can also be improved by expressing or highlighting with color or fill.

  The description returns to the flowchart of FIG. If the comment request display parameter input via the parameter setting unit 16 is ON in the parameter setting determination processing in step S303 (step S303 “YES”), the drawing / display control unit 13 further determines the parameter. The presence / absence of accuracy information input via the setting unit 16 is determined (step S306). Here, if the probability as the accuracy information indicating the certainty of the fluctuation range prediction is set (step S306 “YES”), the drawing / display control unit 13 generates a plurality of values generated by the fluctuation range prediction calculation unit 11. Of the fluctuation range prediction trend graph, the fluctuation range prediction trend graph according to the set probability is drawn so as to be distinguished from other fluctuation range prediction trends, and the prediction trend graph generated by the prediction calculation unit 10 is drawn. The superimposed display data is generated, drawn on the display memory 14, and displayed on the display unit 15 (step S307).

  An example of the screen configuration displayed on the display unit 15 at this time is shown in FIG. Here, three fluctuation range prediction trend graphs of probabilities A (70%), B (80%), and C (90%) are illustrated here, and the probability C (90%) emphasized by hatching is illustrated. The probability that the fluctuation range prediction trend graph is set is shown. Note that, in the vicinity of the fluctuation range prediction trend graph when the comment request display parameter is ON, for example, as shown in FIG. Comment (Com.) ”May be superimposed and displayed.

  The description returns to the flowchart of FIG. If the probability is not set in the parameter setting determination processing in step S306 (step S306 “NO”), the drawing / display control unit 13 gives each probability generated by the fluctuation range prediction calculation unit 11. Display data in which a plurality of fluctuation range prediction trend graphs RG # 1, RG # 2 and the prediction trend graph SG generated by the prediction calculation unit 10 are superimposed is generated and drawn in the display memory 14, for example, FIG. (B) The screen information shown in (c) is displayed on the display unit 15 (step S308).

  In the flowchart shown in FIG. 9, the drawing / display control unit 13 sets parameters input via the parameter setting unit 16 as ON / OFF setting for fluctuation range prediction display, presence / absence of comment request display setting, and accuracy information setting. Although it has been described that the checks are performed in the order of the presence or absence, the order of the checks is not limited.

  As described above, according to the trend graph display device 1 according to the second embodiment, the prediction of fluctuation range of prediction data is calculated together with the accuracy, and the fluctuation range prediction is superimposed on the accuracy and displayed on the screen. Can obtain useful information for situation judgment just by looking at the screen, and it is not necessary to judge the situation after knowing to what extent the result of the simulation may cause a prediction blur. Therefore, the operator can accurately estimate the situation that may occur in the near future and take measures in advance, and as a result, it is possible to avoid danger in advance and production loss.

  Further, according to the trend graph display device 1 according to the second embodiment, the operator can predict the fluctuation range by displaying the prediction result of the fluctuation range of the prediction data in a display form different from the trend indicating the prediction data. Thus reducing the chance of missing useful information for situational judgment. Furthermore, by displaying the prediction result of the fluctuation range of the prediction data in different display forms according to the accuracy, the operator can easily recognize useful information for situation determination. In addition, by approximating the prediction result of the fluctuation range of the prediction data with a straight line and enclosing and displaying the curve indicating the prediction data, the operator can intuitively recognize the variation in the prediction, and the prior action is easy. Become.

  Furthermore, according to the trend graph display device 1 according to the second embodiment, it is possible to configure the accuracy indicating the accuracy of the fluctuation range prediction. For example, the accuracy information is based on the accuracy information set from the outside. By displaying the prediction result of the corresponding fluctuation range separately from the prediction result of the other fluctuation ranges, the visibility is improved and the usability is improved. At this time, more accurate information can be notified to the operator by superimposing a comment indicating the cause of the fluctuation on the prediction result of the fluctuation range of the prediction data. Further, by controlling the display and non-display of the prediction result of the fluctuation range of the prediction data, it is possible to control whether or not the prediction result of the fluctuation range of the prediction data can be displayed for the convenience of the operator.

  As mentioned above, although preferred embodiment of this invention was explained in full detail, it cannot be overemphasized that the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above-described embodiments. Further, it is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

  1 .... Trend graph display device, 10 .... Prediction calculation unit, 11 .... Fluctuation range prediction calculation unit, 12 .... History DB, 13 .... Drawing / Display control unit, 14 .... Display memory, 15 .... Display unit , 15 Parameter setting part

Claims (16)

A trend graph display device that displays prediction data obtained by simulation on the time axis as an extension of past and current trends,
Control means for visually displaying the prediction data superimposed on the prediction accuracy data calculated in relation to the prediction data;
A trend graph display device characterized by comprising: The control means includes
The trend according to claim 1, wherein a prediction upper limit value indicating an upper limit value of a prediction fluctuation range in consideration of the prediction accuracy and a prediction lower limit value indicating a lower limit value of the prediction fluctuation range are displayed on the time axis. Graph display device. The control means includes
A calculation means for calculating the prediction data and a prediction fluctuation range in consideration of the prediction accuracy;
Display means for displaying the prediction data on the screen superimposed on the prediction fluctuation range;
The trend graph display device according to claim 2, further comprising: The display means includes
A color different from other regions in a region surrounded by a line in which the prediction upper limit value indicating the prediction fluctuation range is plotted on the time axis and a line in which the prediction lower limit value is plotted on the time axis 4. The trend graph display device according to claim 3, wherein the trend graph display device performs processing and performs drawing. The display means includes
The trend graph display device according to claim 4, wherein the drawing is performed by performing gradation processing in which the color intensity is variable from a predicted execution time to a future time on the time axis. The display means includes
Setting display transparency in a region sandwiched between a line in which the prediction upper limit value is continuously plotted on the time axis and a line in which the prediction lower limit value is continuously plotted on the time axis, or 6. The trend graph display device according to claim 3, wherein the prediction data including the region is drawn on a lowermost layer. The display means includes
The trend graph display device according to any one of claims 3 to 6, wherein the management data of the measurement item is drawn superimposed on the time axis. The display means includes
The prediction data line plotted in time series in the area surrounded by the line in which the prediction upper limit value indicating the prediction fluctuation range is plotted in time series and the line in which the prediction lower limit value is plotted in time series is gradation. Expressing the blur due to the prediction accuracy of the prediction data by gradation processing so that the reference line is darker as it approaches the reference line and becomes lighter as it approaches the prediction upper limit value or the prediction lower limit value. The trend graph display device according to claim 3. The display means includes
Prediction data calculated for each set condition by the computing means is plotted on the time axis for each condition, the values at the same time are compared for each condition, and the larger prediction data is set to the prediction upper limit value. The smaller one is the change of the prediction lower limit value, and the area sandwiched between the line instead of the prediction upper limit value and the line instead of the prediction lower limit value is subjected to color processing different from other areas. The trend graph display device according to claim 3, wherein a blur of predicted data for each set condition is expressed. A trend graph display device that displays a calculation result by a simulator as prediction data in a graph as an extension of past and current trends,
In addition to the prediction data, calculation means for calculating the prediction result of the fluctuation range of the prediction data together with the accuracy thereof;
Display means for displaying the prediction result of the variation range by the computing means on the screen superimposed on the graph according to the accuracy;
A trend graph display device characterized by comprising: The display means includes
The trend graph display device according to claim 10, wherein the prediction result of the fluctuation range of the prediction data is displayed in a display form different from the trend indicating the prediction data. The display means includes
The trend graph display device according to claim 10 or 11, wherein the prediction result of the fluctuation range of the prediction data is displayed in a different display form for each accuracy. The display means includes
The trend graph display device according to any one of claims 10 to 12, wherein a prediction result of a range of fluctuation of the prediction data is approximated by a straight line, and a trend indicating the prediction data is surrounded by the straight line and displayed. The display means includes
The trend graph display device according to any one of claims 10 to 13, wherein a comment indicating a factor of fluctuation is further superimposed on a prediction result of a fluctuation range of the prediction data. The display means includes
15. The prediction result of a variation range corresponding to the accuracy information is displayed separately from the prediction result of another variation range based on accuracy information set from the outside. Trend graph display device. The display means includes
The display or non-display of the prediction result of the fluctuation range of the prediction data output from the calculation means is controlled based on a command set from the outside. Trend graph display device.

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