JP2009075029A - Display device and display method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display device capable of improving convenience when displaying a trend graph indicating change of measured values. <P>SOLUTION: The display device includes: a storage part for storing an event concerning measured data about a physical amount of a measuring object and the physical amount specified by the change of the measured values based on the measured data; a display part 4 capable of displaying the trend graph G1a indicating the change of the measured value; and a control part for controlling display of the trend graph G1a by the display part 4. The control part displays detailed graph G3 of a prescribed time on the display part 4 including generation time of the event selected when selection operation selecting the event is performed. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a display device and a display method for displaying a trend graph indicating a change in a measured value based on measurement data on a physical quantity to be measured on a display unit.

As this type of display device, a central monitoring device disclosed in Japanese Patent Laid-Open No. 2005-215845 is known. In this central monitoring device, when a change point on the trend graph displayed on the display is designated by a mouse operation, an event that occurred within a predetermined time centered on the time on the time axis corresponding to the change point is detected. Displayed on the same screen as the trend graph. For this reason, it is possible to relatively easily know what event has occurred at the change point on the trend graph.
Japanese Patent Laying-Open No. 2005-215845 (page 4-6, FIG. 5)

  However, the above central monitoring apparatus has the following problems. That is, in this central monitoring device, when a change point on the trend graph is designated, an event occurring at the change point is displayed. On the other hand, for example, when displaying a trend graph based on data collected continuously over a long period of time, it is necessary to display the trend graph with a reduced time axis, and therefore it may be difficult to specify the changing point. In addition, when the variation in the measured value is small, it may be difficult to identify the change point on the trend graph. In such a situation, contrary to specifying the change point on the trend graph and displaying the event that occurred at the change point as described above, when the specified event is specified and the event occurs It may be preferable to display a change point on the trend graph and a detailed trend graph (enlarged graph) at that time. However, the above-mentioned central monitoring apparatus does not have such a function and lacks convenience, and improvement of this point is desired.

  The present invention has been made in view of such problems, and a main object of the present invention is to provide a display device and a display method that can improve convenience when displaying a trend graph indicating changes in measured values.

  In order to achieve the above object, the display device according to claim 1 includes a storage unit that stores measurement data about a physical quantity to be measured and an event about the physical quantity specified by a change in a measurement value based on the measurement data; A display device comprising a display unit capable of displaying a trend graph indicating changes in measured values, and a control unit for controlling display of the trend graph by the display unit, wherein the control unit selects the event When the selection operation to be performed is performed, the trend graph for a predetermined time including the time of occurrence of the selected event is displayed on the display unit.

  The display device according to claim 2 is the display device according to claim 1, wherein when the plurality of selected events exist, the control unit displays each trend graph for the predetermined time for each event. A plurality of images are displayed on the display unit.

  The display device according to claim 3 is the display device according to claim 2, wherein the control unit displays a plurality of trend graphs for the predetermined time on the display unit when the events occur. And simultaneously displaying the trend graph for the continuous time including all of the above on the display unit, and the correspondence between the occurrence site of the event on the trend graph for the continuous time and each trend graph for the predetermined time An identifiable identification display is displayed on the display unit.

  According to a fourth aspect of the present invention, the storage unit stores the measurement data about the physical quantity to be measured and the event about the physical quantity specified by the change in the measurement value based on the measurement data. A display method for displaying a trend graph indicating a change on a display unit, wherein when the selection operation for selecting the event is performed, the trend graph for a predetermined time including the time of occurrence of the selected event is displayed. Display on the display.

  The display method according to claim 5 is the display method according to claim 4, wherein when there are a plurality of the selected events, a plurality of trend graphs for the predetermined time for each event are displayed on the display unit. Display.

  According to the display device according to claim 1 and the display method according to claim 4, when an event specified by a change in measurement value is selected by a selection operation, a trend for a predetermined time including the time of occurrence of the event is selected. By displaying the graph on the display unit, for example, it is necessary to display with a reduced time axis like a trend graph based on measurement data collected over a long period of time, so events are identified (identified) from the trend graph. Even if it is difficult to do so, by selecting a desired event, it is possible to display a trend graph for a predetermined time centering on the time of occurrence of the event. For this reason, according to the display device and the display method, it is possible to sufficiently improve the convenience in a usage pattern in which, for example, a change in measured value at the time of occurrence of a desired event is investigated in detail.

  According to the display device according to claim 2 and the display method according to claim 5, when a plurality of selected events exist, a plurality of trend graphs for a predetermined time for each event are displayed on the display unit. Because it is possible to compare the trend graphs for a predetermined time on the same screen, when the predetermined event occurs multiple times, the usage pattern to compare the change in measured value at each occurrence, It is possible to sufficiently improve the convenience in the usage pattern in which the correlation between changes in measured values at the occurrence of different events is investigated.

  According to the display device of claim 3, when a plurality of trend graphs for a predetermined time are displayed on the display unit, a trend graph for a continuous time including all occurrences of each event is simultaneously displayed on the display unit. A trend graph for a predetermined time is displayed on the display unit by displaying an identification display that can identify the correspondence between the occurrence part of the event on the trend graph for a continuous time and each trend graph for a predetermined time. Even when a plurality of symbols are displayed, it is possible to know at a glance the correspondence between the occurrence portion of the predetermined event on the trend graph for a continuous time and each trend graph for the predetermined time.

  Hereinafter, the best mode of a display device and a display method according to the present invention will be described with reference to the accompanying drawings.

  First, the configuration of the display device 1 will be described. A display device 1 shown in FIG. 1 is an example of a display device according to the present invention, and shows a physical quantity to be measured (for example, a voltage value of a voltage supplied to a motor as a measurement object or a rotation speed of the motor). Trend graphs G1a and G1b (refer to FIG. 2; hereinafter, also referred to as “trend graph G1” when not distinguished from each other) showing the changes (temporal changes) of the measured values are displayed according to the display method according to the present invention. Has been. Specifically, as shown in FIG. 1, the display device 1 includes a measurement unit 2, a storage unit 3, a display unit 4, an operation unit 5, and a control unit 6.

  The measurement unit 2 performs analog-digital conversion on the electrical signal S1 indicating the physical quantity of the measurement target output from the sensors (for example, the voltage sensor 101 and the rotation speed sensor 102 shown in FIG. 1) and generates measurement data D1. The measurement data D1 is output to the control unit 6. The storage unit 3 stores measurement data D1 output from the measurement unit 2 and event data D2 generated by the control unit 6 (which will be described later) under the control of the control unit 6. The storage unit 3 stores an operation program for the control unit 6.

  The display unit 4 includes, for example, an LCD panel, and displays a trend graph G1 based on display data D3 output from the control unit 6 and an event list screen G2 (see FIG. 3). The operation unit 5 includes, for example, various keys such as a display switching key, a detail display key and a cursor key, and a pointing device (not shown) such as a mouse, and is operated when these are operated. The signal S2 is output.

  The control unit 6 controls each component constituting the display device 1 and executes various processes according to the operation signal S <b> 2 output from the operation unit 5. Further, the control unit 6 generates event data D2 indicating an event related to the physical quantity specified by the change in the measured value of the physical quantity, based on the measurement data D1 output from the measurement unit 2. Specifically, for example, the control unit 6 generates, as the event data D2, data indicating an event of “supply start” when the measured value of the voltage increases from 0 to a predetermined value, and the measured value of the voltage value When the value drops from a predetermined value to 0, data indicating an event of “supply stop” is generated as event data D2. Further, the control unit 6 determines that the measured voltage value exceeds a predetermined upper limit value (upper limit value during steady operation of the motor), and the measured rotational speed value of the motor exceeds the upper limit value during steady operation. Is generated as event data D2 indicating an “abnormal rise” event, and when the measured voltage value falls below a predetermined lower limit value (lower limit value during steady operation of the motor), and the measured value of the motor speed is steady. It is generated as event data D2 indicating an “abnormal decrease” event when the value falls below the lower limit during operation.

  In addition, the control unit 6 outputs the display data D3, thereby causing the display unit 4 to display the trend graph G1 and the event list screen G2 in which the various events described above are listed in time series. In this case, when one or more events are selected from the event list screen G2 by a selection operation, the control unit 6 executes a detailed graph display process to be described later, thereby including a predetermined time point including the occurrence time of the event. The trend graph G1 corresponding to the time is enlarged and displayed on the display unit 4 (hereinafter, the enlarged trend graph G1 is also referred to as “detailed graph G3”).

  Next, as an example, the display device 1 is used to measure the voltage value supplied to the motor as the measurement object and the rotation speed of the motor, and display the trend graph G1, the event list screen G2, and the detailed graph G3. The display method (display method in the present invention) and the overall operation of the display device 1 at that time will be described. In this case, a voltage sensor 101 (see FIG. 1) that detects a voltage value and outputs an electric signal S1 indicating the voltage value is connected to the voltage supply circuit, detects the number of rotations of the motor, and indicates the electric signal S1. It is assumed that a rotation speed sensor 102 (see FIG. 5) that outputs the signal is disposed in the motor.

  In the display device 1, the measurement unit 2 performs analog-digital conversion on the electrical signals S 1 output from the voltage sensor 101 and the rotation speed sensor 102 to generate measurement data D 1, and the measurement data D 1 is sent to the control unit 6. Output. In addition, the control unit 6 stores the measurement data D1 output from the measurement unit 2 in the storage unit 3, and generates event data D2 indicating the various events described above based on the measurement data D1 and stores it in the storage unit 3. Remember.

  Here, in the display device 1, it is possible to display either the trend graph G <b> 1 or the event list screen G <b> 2 or both of them by the display switching operation of the display unit 4. ing. In this case, for example, when displaying the trend graph G1, the display switching key of the operation unit 5 is operated to select “display trend graph”. At this time, the control unit 6 reads the measurement data D1 from the storage unit 3 in accordance with the operation signal S2 output from the operation unit 5, and generates display data D3 for displaying the trend graph G1 based on the measurement data D1. And output to the display unit 4. Thereby, as shown in FIG. 2, a trend graph G1a showing a change in the measured value for the voltage supplied to the motor as the measurement object, and a trend graph G1b showing a change in the measured value for the rotational speed of the motor, It is displayed on the display unit 4.

  On the other hand, when displaying the event list screen G2 instead of the trend graph G1, the display switching key of the operation unit 5 is operated to select “display event list screen”. At this time, the control unit 6 reads the event data D2 from the storage unit 3 in accordance with the operation signal S2 output from the operation unit 5, and generates display data D3 for the event list screen G2 based on the event data D2. And output to the display unit 4. As a result, as shown in FIG. 3, an event list screen G2 in which various events regarding the voltage and the rotational speed are listed in time series is displayed on the display unit 4.

  Next, for example, when the change in the measured value at the time of occurrence of the event listed in the event list screen G2 is examined in detail, the detail display key of the operation unit 5 is operated. At this time, the control unit 6 controls the display unit 4 to display a cursor in the event list screen G2, as shown in FIG. Next, the cursor key and pointing device of the operation unit 5 are operated to move the cursor to the “item” portion in the event list screen G2 indicating the physical quantity, as shown in FIG. Down menu) A desired physical quantity (for example, “voltage”) is selected from M. Next, the pointing device is operated in the same manner to select a desired event (for example, “abnormality decrease”).

  Subsequently, the control unit 6 executes the detailed graph display process according to the operation signal S2 output from the operation unit 5 in response to the above operation. In the detailed graph display process, the control unit 6 specifies the occurrence time of the selected event in the selected physical quantity based on the event data D2. In this case, when there are a plurality of applicable events (three in this example), the control unit 6 specifies the occurrence time of each event. Next, the control unit 6 extracts and reads out the measurement data D1 for a predetermined time (for example, several seconds to several tens of seconds) centered on each identified time from the storage unit 3.

  Subsequently, the control unit 6 generates display data D3 for the detailed graph G3 based on the extracted measurement data D1 and display data D3 for the trend graph G1 based on the measurement data D1 before extraction on the display unit 4. Output. As a result, as shown in FIG. 5, a trend graph G1a showing changes in the measured value of the voltage and three detailed graphs showing changes in the measured value of the voltage for a predetermined time centered on the time when the abnormal drop in voltage occurs. G3 is displayed on the display unit 4. In this case, as shown in the figure, for example, numerical values are assigned in order of time series to the display portion centering on the time when the abnormal drop in voltage occurs on the trend graph G1a, and the numerical values are also displayed in each detailed graph G3. Attached (display of identification display in the present invention). As a result, even when a plurality of detailed graphs G3 are displayed, the correspondence between each portion of the trend graph G1a where the abnormal drop in voltage has occurred and each detailed graph G3 becomes clear at a glance.

  In this case, in the display device 1, as shown in FIG. 5, even if it is difficult to identify (identify) the occurrence of an event such as an abnormal decrease in voltage or rotation speed from the trend graph G 1 a, As described above, by selecting a desired event from among the events listed on the event list screen G2, a detailed graph G3 for a predetermined time centering on the occurrence time of the event is displayed. For this reason, in the display device 1, for example, convenience in a usage pattern in which a change in measured value at the time of occurrence of a desired event is investigated in detail is sufficiently improved. Further, in the display device 1, when there are a plurality of selected events (“abnormal decrease” in the “voltage” described above) (three in the above example), the detailed graph G3 for each event is displayed on the display unit 4. A plurality (three in the above example) are displayed. For this reason, since each detailed graph G3 can be compared on the same screen, when a predetermined event occurs a plurality of times, the convenience in the usage mode in which the change in the measured value at each occurrence is compared is also sufficient. Has been improved.

  Next, instead of “abnormal decrease” in “voltage”, when selecting an event in another physical quantity (for example, “abnormal decrease” in “rotational speed”), the display list key G2 is displayed by operating the display switching key. Then, the detail display key is operated, and then, in the same manner as the above-described operation, “rotation speed” as a physical quantity is selected in the event list screen G2, and “abnormal decrease” as an event is selected. Subsequently, as shown in FIG. 6, the control unit 6 executes the above detailed graph display process, and as shown in FIG. 6, the trend graph G <b> 1 b indicating the change in the measured value of the rotational speed and the time when the abnormal decrease in the rotational speed has occurred. A detailed graph G3 showing a change in the measured value of the rotation speed for a predetermined time at the center is displayed on the display unit 4.

  On the other hand, when selecting both “abnormal decrease” in “voltage” and “abnormal decrease” in “rotation speed”, the detail display key is pressed after the event switching screen is operated to display the event list screen G2. Then, in the same manner as the above-described operation, “Voltage” and “Rotation speed” as physical quantities are selected in the event list screen G2, and “abnormal decrease” as an event is selected. Subsequently, as shown in FIG. 7, the control unit 6 executes the detailed graph display process, and as shown in FIG. 7, the trend graphs G1a and G1b respectively showing changes in the measured value of the voltage and the measured value of the rotation speed, and the voltage and rotation Four detailed graphs G3 each showing changes in the measured voltage value and the measured rotational speed value for a predetermined time centered on the time when the abnormal drop in the number occurs are displayed on the display unit 4.

  In this case, in the display device 1, a plurality of detailed graphs G <b> 3 for each event are displayed on the display unit 4 by selecting a plurality of types of events (in this example, abnormal decrease in voltage and abnormal decrease in rotation speed). The For this reason, since each detailed graph G3 can be compared on the same screen, the convenience in the usage form which investigates the correlation of the change of the measured value at the time of generation | occurrence | production of a different event is fully improved.

  As described above, in the display device 1 and the display method, when an event specified by the change in the measurement value is selected by the selection operation, the trend graph G1 for a predetermined time including the occurrence time of the event is displayed on the display unit 4. To display. For this reason, for example, since it is necessary to display a reduced time axis as in the trend graph G1 based on the measurement data D1 collected over a long time, it is difficult to identify (identify) an event from the trend graph G1. Even in such a case, by selecting a desired event, it is possible to display a detailed graph G3 for a predetermined time centering on the occurrence time of the event. For this reason, according to the display device 1 and the display method, it is possible to sufficiently improve the convenience in a usage pattern in which, for example, a change in measured value at the occurrence of a desired event is investigated in detail.

  In the display device 1 and the display method, when there are a plurality of selected events, a plurality of detailed graphs G3 for each event are displayed on the display unit 4. For this reason, each detailed graph G3 can be compared on the same screen, so when a predetermined event occurs multiple times, the usage pattern for comparing the change in measured value at each occurrence or the occurrence of different events It is possible to sufficiently improve the convenience in a usage pattern in which the correlation between changes in measured values at the time is investigated.

  Further, in the display device 1, when a plurality of detailed graphs G3 are displayed on the display unit 4, numerical values as identification displays that can identify the correspondence between the occurrence portion of a predetermined event in the trend graph G1 and each detailed graph G3. Is displayed. For this reason, even when a plurality of detailed graphs G3 are displayed, it is possible to know at a glance the correspondence between the occurrence site of the predetermined event on the trend graph G1 and each detailed graph G3.

  In addition, this invention is not limited to said structure. For example, in the detailed graph display process, the configuration example in which only the trend graph G1 and the detailed graph G3 are simultaneously displayed has been described above. However, as shown in FIG. 8, the trend graph G1, the event list screen G2, and the detailed graph G3 are simultaneously displayed. A configuration can also be adopted. In the detailed graph display process, a configuration in which only the detailed graph G3 is displayed without displaying the trend graph G1 or the event list screen G2 may be employed. Further, the configuration example in which the event for which the detailed graph G3 is displayed is selected in the event list screen G2 has been described above. It is also possible to employ a configuration in which a screen similar to the menu M is displayed and a desired event is input or selected on the screen. In addition, the above-described voltage and rotation number as physical quantities, and supply start, supply stop, abnormal rise and abnormal fall as events are examples, and other various physical quantities and various other events are included as a matter of course. It is. In addition, the identification display in the present invention is not limited to a numerical value, and may be an identification display that enables identification with different characters and display colors, or a predetermined event on each of the plurality of detailed graphs G3 and the trend graph G1. It is also possible to use, as an identification display, a line segment in which the correspondence relationship is identifiable with the generation site.

3 is a block diagram illustrating a configuration of the display device 1. FIG. It is a display screen figure of trend graph G1a, G1b. It is a display screen figure of event list screen G2. It is explanatory drawing for demonstrating the selection method of a physical quantity and an event. It is a display screen figure of trend graph G1a and detailed graph G3. It is a display screen figure of trend graph G1b and detailed graph G3. It is a display screen figure of trend graph G1a, G1b and detailed graph G3. It is a display screen figure of trend graph G1a, G1b, event list screen G2, and detailed graph G3.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Display apparatus 2 Measuring part 3 Memory | storage part 4 Display part 5 Operation part 6 Control part D1 Measurement data G1a, G1b Trend graph G2 Event list screen G3 Detailed graph

Claims (5)

A storage unit that stores measurement data about a physical quantity to be measured and an event about the physical quantity specified by a change in a measurement value based on the measurement data; a display unit that can display a trend graph indicating the change in the measurement value; A display device including a control unit that controls display of the trend graph by the display unit,
The said control part is a display apparatus which displays the said trend graph for the predetermined time including the time of generation | occurrence | production of the selected event on the said display part, when selection operation which selects the said event is performed.   The display device according to claim 1, wherein when there are a plurality of the selected events, the control unit causes the display unit to display a plurality of trend graphs for the predetermined time for each event.   When the control unit displays a plurality of trend graphs for the predetermined time on the display unit, the control unit simultaneously displays a trend graph for a continuous time including all occurrences of the events on the display unit, The display device according to claim 2, wherein an identification display capable of identifying a correspondence relationship between the occurrence part of the event on the trend graph for the continuous time and the trend graph for the predetermined time is displayed on the display unit. The measurement data about the physical quantity to be measured and the event about the physical quantity specified by the change in the measurement value based on the measurement data are stored in the storage section, and the trend graph indicating the change in the measurement value is displayed on the display section Display method,
A display method for causing the display unit to display the trend graph for a predetermined time including the time of occurrence of the selected event when a selection operation for selecting the event is performed.   The display method according to claim 4, wherein when there are a plurality of the selected events, a plurality of trend graphs for the predetermined time for each event are displayed on the display unit.

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