JP2007256170A - Waveform display and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To display a specified point on a waveform indicated by a cursor to discriminate a measuring point from a non-measuring point at glance, when displaying the waveforms based on measured values in different measuring periods, on the same screen, to display the cursor. <P>SOLUTION: This waveform display includes a means (S11) for reading the plurality of different kinds of measured values while classified the kind by the kind, and for reading a data indicating an interval for measuring times of the respective kinds of measured values, a means for displaying the waveform of the every kind of measured value on the display screen while interpolating the respective measured values therebetween, based on the read measured values, a means (S25) for displaying the cursor crossed with the at least two waveforms, on the display screen, and means (S29, S30, S31) for determining whether each intersection of the displayed waveform with the displayed cursor corresponds to the measured time or not (S29), and for displaying a prescribed mark on the display screen, based on a determination result. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a waveform display device and a program for displaying measured values as waveforms.

  The cursor display on the screen (display surface) on which the waveform is displayed has been performed using data viewer software that displays data stored in a file from before (see Patent Document 1). FIG. 6 shows an example in which a waveform is displayed on the same screen and a cursor is displayed on the same screen in the waveform display device as described in Patent Document 1. By placing a circle mark at the intersection of the line cursor and waveform, the cursor display is easy to read. Even if multiple waveforms are displayed, the visibility is not changed.

  The cursor is an indicator made up of an underline or a symbol indicating the position where characters / graphics are input / displayed on the display surface of a computer, a measuring device, etc. In particular, in the waveform display device, one or a plurality of symbols are displayed together with the waveform display. Is used to read the value of a specific point on one or a plurality of waveforms indicated by the cursor and the difference value between the specific points. Such cursor shapes include a line cursor that is displayed parallel to the vertical or horizontal axis and moves in the horizontal or vertical direction, or a cursor that is displayed in two directions, the horizontal and vertical axes. There is a crosshair cursor to indicate.

FIG. 7 is a diagram illustrating an example of displaying a cursor by displaying waveforms based on measurement values of different measurement periods on the same screen in the waveform display device as described above. As in FIG. 6, the cursor display is easy to read the value by marking the intersection of the line cursor and the waveform. In the example of FIG. 7, when displaying waveforms and line cursors based on measurement values of a plurality of different measurement periods on the same screen, the minimum cursor movement resolution (hereinafter referred to as a unit period) based on the ratio of each measurement period. Calling). In the example of FIG. 7, since a waveform with a measurement period of 1 s (1000 ms) and a waveform with a period of 500 ms are displayed at the same time, the unit period is set to 500 ms, and the cursor display is moved in units of 500 ms. In this method, when displaying a waveform based on the measurement value of a measurement period longer than the unit period, it is represented by the value measured at the actual measurement time among the display points displayed as the intersection with the line cursor. There are certain points (hereinafter referred to as measurement points) and other points (hereinafter referred to as non-measurement points). For example, FIG. 8 shows a waveform in which the measurement period is three times longer than the unit period.
Japanese Patent Laid-Open No. 10-123178

  As shown in Fig. 7, when a cursor is displayed on the same screen with waveforms based on measured values in different measurement periods, the cursor is also displayed at non-measurement points for waveforms based on data whose measurement period is longer than the unit period. Will be. However, with the conventional device, the mark displayed at the intersection of the cursor and waveform is the same regardless of whether it is a measurement point or a non-measurement point. I couldn't judge. Since the measurement point is when data is actually taken, it is important to know what value other data is at that time. Conventional cursor display is inconvenient when knowing the value of other data at a measurement point of certain data. In particular, when the measurement cycle is greatly different, for example, as shown in FIG. 9, when displaying a waveform based on data with a measurement cycle of 1 second and 1 hour, if the unit cycle is 1 second, the data with the longer measurement cycle is adjacent. Since there are 3599 measurement points of data having a short measurement cycle between the matching measurement points, it is difficult to distinguish between measurement points of data having a long measurement cycle and non-measurement points.

  The present invention has been made in consideration of the above circumstances, and when a cursor is displayed by displaying waveforms based on measurement values of different measurement periods on the same screen, a specific point on the waveform indicated by the cursor is: An object of the present invention is to provide a waveform display device and a program capable of displaying a measurement point or a non-measurement point so that it can be seen at a glance.

  In order to solve the above problems, the waveform display device of the present invention reads a plurality of different types of measurement values for each type and reads data indicating the measurement time interval of each type of measurement value, and the read measurement Waveform display means for displaying a waveform for each type of measurement value on the display surface while interpolating between measured values based on the value, and cursor display means for displaying a cursor intersecting at least two or more waveforms on the display surface And a mark display means for determining whether or not each intersection of the displayed cursor and the displayed waveform corresponds to the measurement time, and displaying a predetermined mark on the display surface based on the determination result. Features.

  In the waveform display device of the present invention, the cursor display means may adopt a configuration in which the cursor is displayed in correspondence with a unit period set based on the measurement time interval of each type of measurement value. it can.

  In the waveform display device of the present invention, it is possible to adopt a configuration in which the unit period is set based on the calculation of the greatest common divisor based on the measurement time interval of each type of measurement value.

Next, the waveform display program of the present invention reads a plurality of different types of measurement values for each type and reads data indicating the measurement time interval of each type of measurement values;
A waveform display process for displaying waveforms for each type of measurement values on the display surface while interpolating between the measurement values based on the read measurement values, and a cursor that intersects at least two or more waveforms are displayed on the display surface. A cursor display process, and a mark display process for determining whether each intersection of the displayed cursor and the displayed waveform corresponds to the measurement time, and displaying a predetermined mark on the display surface based on the determination result It contains a description to be executed by a computer.

  According to the present invention, the mark display means can determine whether each intersection of the displayed cursor and the displayed waveform corresponds to the measurement time, and can display a predetermined mark based on the determination result. Therefore, it is possible to determine at a glance whether the cursor display position is a measurement point or a non-measurement point on each waveform.

  Further, according to the present invention, the display position of the cursor is set in correspondence with the unit period set based on the measurement time interval of each type of measurement value. When the display position is moved, the position of the cursor can be easily set to a place where the measurement point exists. In addition, according to the present invention, the unit period is set based on the calculation of the greatest common divisor based on the measurement time interval of each type of measurement value. Therefore, when a plurality of waveforms are displayed, a user operation is performed. Accordingly, when the cursor display position is moved, the cursor position can be efficiently set to a place where the measurement point exists.

  Embodiments of a waveform display device according to the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram illustrating a configuration example of the present embodiment. The present embodiment is configured as a personal computer, a waveform measuring device, and the like, and includes a CPU (central processing unit) 1, an output device 2 including a display, a printer, etc., and a memory including a RAM (random access memory). 3, an input device 4 including a keyboard and a mouse, and a storage device 5 including a hard disk. The memory 3 has an area 31 for storing control parameters, an area 32 for storing data such as measured waveform data (measured values), etc., and data input / output with the CPU 1 and the storage device 5. Read / write. The storage device 5 stores a program file 51, which is a program describing functions provided by the present embodiment, and a plurality of measured waveform data files 52, 52,... Composed of measured waveform data.

  The program file 51 is stored in the storage device 5 via an optical or magnetic recording medium 6 or a communication line, and is read into the memory 3 according to an instruction from the CPU 1 at the start of execution. The measurement waveform data file 52 is obtained by reading data measured and recorded by a built-in measurement unit (not shown) or measured and recorded by an external measurement device via a recording medium or a communication line. Here, each measurement waveform data file 52 has one or a plurality of waveform data (measurement values) at each measurement time, and further indicates the measurement time interval (measurement cycle) of each waveform data. Data including data, unit of each waveform data, date of measurement, and the like are also included.

  The CPU 1 reads the program file 51 in accordance with the user's operation on the input device 4 and then executes the program to access the measurement waveform data file 52 selected in accordance with the user's operation. Waveform data, data indicating measurement time intervals, and the like are read into the memory 3. Further, the CPU 1 interpolates between the waveform data for each type of waveform data based on the waveform data read into the memory 3, and displays the waveform and time axis (X axis) on the screen of the output device 2 (or on the print medium). ), A measurement value axis (Y axis), a character string representing a unit, and the like are drawn. The CPU 1 also displays a cursor on the screen in accordance with a user operation. The present embodiment is characterized by the processing related to the display of the cursor, and the contents thereof will be described below with reference to FIGS.

  FIG. 2 is a flowchart showing a flow of processing related to cursor display by the configuration shown in FIG. 1, and FIG. 3 is a diagram showing a display example on the output device 2. In FIG. 2, a block B1 surrounded by a broken line includes processing for reading the measurement waveform data file 52, acquiring various information, calculating a unit period, and assigning a data number. The block B2 includes processing when the user displays a cursor using a mouse or the like.

  When the CPU 1 receives an instruction from the user via the input device 2, the CPU 1 reads the measurement waveform data file 52 (step S11) and inputs the number of waveforms to be displayed into the variable num (step S12). Next, “0” is stored in a variable i (a variable representing a waveform number) (step S13), and steps S14 to S17 are repeatedly executed by the number num of waveforms. As a result, the array variable interval [i] is converted into an integer value from the measurement cycle (measurement time interval), the measurement start time is stored in the array variable st [i], and the measurement is ended in the array variable et [i]. The time is stored for each waveform. Here, the conversion of the measurement period into an integer value is performed according to the size of each measurement period so that a plurality of measurement periods are all integer values (for example, 1 ms = 0.001 s is “1”). It is obtained by multiplying all measurement periods by the same coefficient. For example, as shown in FIG. 3, when displaying two waveforms (waveform 1 and waveform 2) having a measurement cycle of 1 second and a measurement cycle of 500 ms, both are multiplied by 1000 and converted to “1000” and “500”, respectively. .

  Next, the minimum value of the measurement start times of the plurality of waveforms is stored in the variable st_min (step S18), and the maximum value of the measurement end times of the plurality of waveforms is stored in the variable et_max (step S19). ). Next, the greatest common divisor (that is, the unit period) of the measurement period of each waveform (however, converted to an integer value in step S16) is obtained and stored in the variable gcd (step S21). In the example of the two waveforms shown in FIG. 3, assuming that the values after the integer conversion of the measurement period are “1000” and “500”, the greatest common divisor “500” is stored in the variable gcd.

  Then, data numbers are assigned at intervals of the unit period (variable gcd) obtained in step S21 from the minimum measurement start time to the maximum measurement end time in each waveform (that is, for all measurement times) (step S22). . For example, in the example of FIG. 3, the waveform data 10 of the waveform 2 (reference number: 12) is the data measured at the earliest time, and this time becomes the data number “1” (or “0”), and thereafter, the unit cycle Numbered at intervals (in this case, “500” intervals or 500 ms intervals).

  Next, the user's mouse input (operation for clicking the position where the cursor is displayed) is accepted (step S23), the data number of the mouse click position is stored in the variable dataNo (step S24), and the cursor is moved to the position of the variable dataNo. Displayed (step S25). In the example of FIG. 3, the user clicks the mouse, the data number “1” is stored in the variable dataNo, and the cursor 7 is displayed. In FIG. 3, the second cursor 8 is also displayed. However, the cursor 8 can be displayed by repeating the processes in steps S <b> 23 to S <b> 25 again.

  Next, after initializing the variable i (step S26), steps S27 to S32 are repeatedly executed for the number of waveforms. In step S27, the variable i and the variable num (number of waveforms) are compared. In step S28, the data number of the measurement start time of each waveform is stored in the variable stDataNo. In the case of waveform 1 (11) in FIG. 3, since the data number “2” is the measurement start time, “2” is stored in the variable stDataNo. In the case of waveform 2 (12), the data number “1” is the measurement start time, so “1” is stored in the variable stDataNo.

  Next, the value obtained by subtracting the variable stDataNo from the data number (variable dataNo) displaying the cursor (dataNo-stdataNo), and the value obtained by converting the measurement period to an integer (variable interval [i]) is the greatest common divisor (variable) The remainder when dividing by the value (interval [i] / gcd) divided by gcd), that is, the remainder ((dataNo−stdataNo)% (interval [i] / gcd)) is obtained, and is this “0”? It is determined whether or not (step S29). On the other hand, if it is not “0”, no measured waveform data exists in the data number in the waveform, so a mark for a non-measurement point is displayed (step S30). On the other hand, “0” is displayed. In such a case, since the measurement waveform data exists at the data number in the waveform, a mark for the measurement point is displayed (step S31).

  In the example of FIG. 3, for the data number “1” of the cursor 7, the waveform 1 (11) has the variable stdataNo “2” and the interval [0] “1000”, so the left side of the determination formula in step S29 is ( Since (1-2)% (1000/500)) = − 1, it does not coincide with “0” on the right side, and a mark indicating a non-measurement point (blacked out) is at the intersection of the cursor 7 and the waveform 1 (11). (Circle) 21 is displayed. On the other hand, since the variable stdataNo is “1” and the interval [1] is “500” in the waveform 2 (12), the left side of the determination formula in step S29 is ((1-1)% (500/500)) = 0. Therefore, it coincides with the right side “0”, and a mark (open circle) 23 indicating the measurement point is displayed at the intersection of the cursor 7 and the waveform 2 (12).

  As shown in FIG. 3, when another cursor 8 is displayed, the processes of steps S <b> 26 to S <b> 32 are repeatedly executed for the data number “4” of the cursor 8. In this case, since it is determined that both the waveform 1 (11) and the waveform 2 (12) have measurement points, the mark 22 and the mark 24 are displayed, respectively.

  As described above, according to the present embodiment, when a cursor is displayed, a mark indicating a measurement point or a non-measurement point is displayed for each waveform at the intersection of the waveform and the cursor. Therefore, it is possible to determine at a glance whether the display position of the cursor is a measurement point or a non-measurement point on each waveform. In this case, the display position of the cursor is set so as to correspond to the data number, that is, to correspond to the unit period set based on the measurement period of each waveform data. This unit period is set based on the calculation of the greatest common divisor based on the measurement period of each waveform data. Therefore, since the cursor display position moves so as to correspond to the unit period set based on the measurement period of each waveform data, when the user moves the cursor display position according to the operation, The position of the cursor can be easily set to the place where the measurement point exists. In addition, since the unit cycle is set based on the calculation of the greatest common divisor based on the measurement cycle of each waveform data, the cursor display position matches the measurement point when the measurement cycle of waveform data of multiple waveforms is different When a plurality of waveforms are displayed, when the cursor display position is moved according to the user's operation, the cursor position is efficiently set to the place where the measurement point exists. be able to.

  It should be noted that at the measurement point and the non-measurement point, the mark is displayed at the intersection of the cursor and the waveform. Any mark can be used as long as it can be distinguished at a glance. For example, as shown in FIG. 4, it is conceivable to distinguish the mark by “display” or “not display”. In addition to the purpose of distinguishing between measurement points and non-measurement points, it is conceivable that the state of each data at that position is represented by a mark. For example, as shown in FIG. 5, the alarm ON / OFF may be represented by different marks 31 and 34.

  As described above, according to the present embodiment, when displaying waveforms based on data of different measurement periods on the same screen, the maximum common divisor of the measurement periods of each data displayed on the same screen is displayed as the minimum resolution of the display screen. In order to distinguish between measurement points and non-measurement points in the cursor display, different marks are attached so that the intersection of the cursor and waveform can be distinguished between measurement points and non-measurement points. Non-measurement points can be displayed so that the distinction can be seen at a glance.

  The embodiment of the present invention is not limited to the above, and for example, the distinction between a measurement point and a non-measurement point can be displayed by changing the color or thickness of the cursor itself, or a mark can be displayed. It is also possible to change the blinking cycle when displaying. In addition, the aspect of the present invention can also be understood as a waveform display method including each process including functions of respective units constituting the apparatus.

The block diagram which shows the structural example of the waveform display apparatus by this invention. The flowchart for demonstrating the cursor display process in the waveform display apparatus of FIG. The figure which shows the example of a cursor display in the waveform display apparatus of FIG. The figure which shows the other example of a cursor display in the waveform display apparatus of FIG. The figure which shows the other example of a cursor display in the waveform display apparatus of FIG. The figure which shows the example of a waveform display for demonstrating the background art of this invention. The figure which shows the example of a waveform display for demonstrating the background art of this invention. The figure which shows the example of a waveform display for demonstrating the background art of this invention. The figure which shows the example of a waveform display for demonstrating the background art of this invention.

Explanation of symbols

1 CPU
2 Output device 3 Memory 4 Input device 5 Storage device 6 Media 7, 8 Cursor 51 Program file 52 Measurement waveform data file 21 Non-measurement point mark 22, 23, 24 Measurement point mark

Claims (4)

Data reading means for reading a plurality of different types of measurement values for each type and reading data indicating the measurement time interval of each type of measurement value;
Waveform display means for displaying a waveform for each type of measurement value on the display surface while interpolating between each measurement value based on the read measurement value;
Cursor display means for displaying a cursor crossing at least two or more waveforms on the display surface;
And a mark display means for determining whether or not each intersection of the displayed cursor and the displayed waveform corresponds to a measurement time, and displaying a predetermined mark on the display surface based on the determination result. Waveform display device. The waveform display device according to claim 1, wherein the cursor display unit displays a cursor corresponding to a unit period set based on an interval between measurement times of each type of measurement value. The waveform display device according to claim 2, wherein the unit period is set based on the calculation of the greatest common divisor based on the measurement time interval of each type of measurement value. A data reading process for reading a plurality of different types of measurement values for each type and reading data indicating the measurement time interval of each type of measurement value,
A waveform display process that displays waveforms for each type of measurement value on the display surface while interpolating between each measurement value based on the read measurement value;
A cursor display process for displaying a cursor crossing at least two or more waveforms on the display surface;
To determine whether each intersection of the displayed cursor and the displayed waveform corresponds to the measurement time, and to cause the computer to execute a mark display process for displaying a predetermined mark on the display surface based on the determination result A waveform display program including a description of

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