JP4910740B2 - Waveform display device - Google Patents

Description

  The present invention relates to a waveform display device, and more particularly to improvement of measurement value display in a device that displays a change state of a measurement signal as a graph-like waveform by continuous line segments.

  As a type of waveform display device, there is a paperless recorder as shown in Patent Document 1 in which a two-dimensional display such as a liquid crystal display device or a plasma display device is regarded as a recording paper. In the paperless recorder, various physical quantities such as temperature, pressure, and flow rate are converted into electrical signals by sensors that are compatible with each measurement target and stored in the data memory as measurement data, and the measurement time of these converted electrical signals passes. The state of change associated with is displayed on a two-dimensional display as a graphic waveform by continuous line segments of a plurality of channels.

  FIG. 5 is an example of a display screen in such a conventional paperless recorder. In FIG. 5, continuous line segments L <b> 1 to L <b> 3 represent the change state of the measurement signals of the plurality of channels CH <b> 1 to CH <b> 3 as a graph waveform with a predetermined display color assigned in advance. The time axis of the display screen in the measurement state scrolls from left to right as indicated by arrow A.

  The pointers P1 to P3 indicate the current values of the measurement signals of the channels CH1 to CH3. The pointers P1 to P3 have the same color as the display colors of the measurement signal waveforms of the channels CH1 to CH3, and are assigned channel numbers. It has been. These pointers P1 to P3 move in the direction of the amplitude X-axis in conjunction with the change of each measured value on the screen.

  The scales SL1 to SL3 indicate the scale values corresponding to the measurement ranges 0 to 100% of the measurement signals of the channels CH1 to CH3 together with the physical quantity units, and the display colors of the measurement signal waveforms of the channels CH1 to CH3 are the same color. Assigned.

JP-A-10-253401

  By the way, the operation mode of the paperless recorder includes a real-time mode in which measurement data is sequentially stored in the data memory and displayed on the display screen in real time, and a part of the measurement data stored in the data memory is read and displayed on the display screen. There is a viewer mode.

  In the case of a chart recorder that is configured to record the change state of the measurement signal on the folded chart as a graphical waveform with continuous line segments, an overview of the measured value fluctuations such as the presence or absence of abnormal values from the folded recorded part is displayed. It was also recognized.

  However, a paperless recorder that stores measurement data sequentially in the data memory and displays it on the display screen recognizes the outline of the measurement data stored in the data memory unless the measurement data stored in the data memory is played back. I can't. Playback of measurement data from the data memory is relatively easy, but I don't want to play back the measurement data, whether it is necessary to play back the measurement data or whether there is an abnormal value in the measurement data. There are many cases where I do not know.

  The present invention pays attention to such conventional problems, and its purpose is to provide an overview of the measurement data of the non-display portion that is temporally continuous with the display waveform of the waveform display area stored in the data memory. An object of the present invention is to provide a waveform display device that can be recognized without playback.

In order to achieve such a problem, the invention of claim 1
In the waveform display device that displays the change state of the measurement signal on the display screen as a graph waveform with continuous line segments,
When reading a part of the measurement data stored in the data memory and displaying it on the display screen as a graphical waveform,
An overview of the measurement data of the non-display portion in the future time area and the past time area that are continuous in time with the display waveform in the waveform display area is the length of the line segment connecting the maximum value and the minimum value, respectively. It has a summary display area for displaying in a direction orthogonal to the time axis so as to be identifiable on the same screen as the display waveform .

The invention of claim 2 is the waveform display device of claim 1,
A maximum / minimum detection unit for detecting the maximum value and the minimum value of the measurement data of the non-display part which is stored in the data memory and is continuous in time with the display waveform in the waveform display area;
It has a summary display processing unit that connects the maximum value and the minimum value of the measurement data of the non-display portion detected by the maximum / minimum detection unit and displays them in a direction orthogonal to the time axis.

The invention according to claim 3 is the waveform display device according to claim 1 or 2,
In the vicinity of one end along the time axis of the waveform display area, a summary display area of measurement data of a non-display part in the future time area is provided,
In the vicinity of the other end along the time axis of the waveform display area, a summary display area of measurement data of a non-display portion in the past time area is provided .

The invention of claim 4 is the waveform display device according to claim 1 or 2 ,
A scale corresponding to the measurement data is provided near any end along the time axis of the waveform display region ,
On the future time area side of this scale, a summary display area for measurement data of the non-display part in the future time area is provided, and on the past time area side, an overview display area for measurement data of the non-display part in the past time area is provided. It is characterized by that.

The invention of claim 5 is the waveform display device according to any one of claims 1 to 4,
The waveform display device has a real-time mode in which measurement data is sequentially stored in the data memory and displayed on the display screen in real time, and a viewer mode in which a part of the measurement data stored in the data memory is read and displayed on the display screen. It can be selected.

  As a result, the outline of the measurement data of the non-display portion that is temporally continuous with the display waveform in the waveform display area stored in the data memory can be recognized with the same feeling as the chart recorder without being played back.

  Hereinafter, the present invention will be described with reference to the drawings. FIG. 1 is a specific example of a display screen according to the present invention, and the same reference numerals are given to portions common to FIG. FIG. 1 shows an example of a display screen in a real-time mode in which measurement data is sequentially stored in a data memory and displayed on the display screen in real time.

  In FIG. 1, a continuous line segment Ln in the waveform display area WA represents a change state of the measurement signal of the channel CHn as a graph waveform with a predetermined display color assigned in advance. The time axis of the display screen in the measurement state scrolls from left to right as indicated by arrow A.

  The pointer Pn indicates the current value of the measurement signal of the channel CHn, is the same color as the display color of the measurement signal waveform of the channel CHn, and is assigned an assigned channel number n. The pointer Pn moves on the screen in the direction of the amplitude X axis in conjunction with the change in the measured value of the channel CHn.

  A scale SLn is provided near the right end of the waveform display area WA along the time axis. The scale SLn indicates a scale value corresponding to the measurement range 0 to 100% of the measurement signal of the channel CHn together with the physical quantity unit, and is assigned the same color as the display color of the measurement signal waveform of the channel CHn. Then, a line segment MM, which is superimposed along the scale SLn and connects the maximum value max and the minimum value min of the measurement data of the non-display portion that is temporally continuous with the display waveform of the waveform display area WA, It is highlighted as a thick line of the same color as the display color of the measurement signal waveform of the channel CHn having a wide line width so that it can be distinguished from the line segment. That is, this line segment mm functions as a summary display area provided in a direction orthogonal to the time axis of the waveform display area WA.

  Thereby, the operator does not display the outline of the measurement data of the non-display portion that is temporally continuous with the display waveform of the waveform display area WA as the length of the line segment mm connecting the maximum value max and the minimum value min. Without being played back and scroll-displayed on the waveform display area WA, the measurement data of the portion can be always grasped and recognized intuitively on the same screen as the waveform displayed in the waveform display area WA.

  FIG. 2 is another specific view of the display screen according to the present invention, and the same reference numerals are given to portions common to FIG. FIG. 2 is an example of a display screen in the viewer mode in which a part of the measurement data stored in the data memory is read and displayed on the display screen.

  In FIG. 2, a continuous line segment Ln in the waveform display area WA represents a change state of the measurement signal of the channel CHn as a graph waveform with a predetermined display color assigned in advance. The time axis of the display screen in the measurement state scrolls from left to right as indicated by arrow A.

  The pointer Pn indicates the current value of the measurement signal of the channel CHn, is the same color as the display color of the measurement signal waveform of the channel CHn, and is assigned an assigned channel number n. The pointer Pn moves on the screen in the direction of the amplitude X axis in conjunction with the change in the measured value of the channel CHn.

  Near the left end of the waveform display area WA along the time axis, a scale SLnf corresponding to the measurement data in the future time area following the current time area of the measurement data displayed in the waveform display area WA is provided, and near the right end. A scale SLnb corresponding to the measurement data in the past time domain following the current time domain of the measurement data displayed in the waveform display area WA is provided. These scales SLnf and SLnb also indicate the scale value corresponding to the measurement range 0 to 100% of the measurement signal of the channel CHn together with the physical quantity unit, and are assigned the same color as the display color of the measurement signal waveform of the channel CHn.

  Then, a line segment mmf obtained by connecting the maximum value maxf and the minimum value minf of the measurement data of the non-display portion of the future time region that is temporally continuous with the display waveform of the waveform display region WA is overlapped along the scale SLnf. It is highlighted as a thick line of the same color as the display color of the measurement signal waveform of the channel CHn having a wide line width so that it can be distinguished from other line segments, and is superimposed along the scale SLnb to display the display waveform in the waveform display area WA. The measurement signal waveform of the channel CHn having a wide line width so that the line segment mmb connecting the maximum value maxb and the minimum value minb of the measurement data of the non-display portion in the past time domain that is continuous in time can be distinguished from other line segments. Is highlighted as a thick line of the same color. That is, these line segments mmf and mmb function as a summary display area provided in a direction orthogonal to the time axis of the waveform display area WA.

  As a result, the operator sets the outline of the measurement data of the non-display portion of the future time region that is temporally continuous with the display waveform of the waveform display region WA as the length of the line segment mmf connecting the maximum value maxf and the minimum value minf. The measured data of the non-display part can be always intuitively grasped and recognized on the same screen as the waveform displayed in the waveform display area WA without being played back and scrolled to the waveform display area WA. The measurement data of the non-display portion in the continuous past time region is summarized as the length of the line segment mmb connecting the maximum value maxb and the minimum value minb, and the measurement data of the non-display portion is played back to the waveform display region WA. It is possible to always grasp and recognize intuitively on the same screen as the display waveform of the waveform display area WA without scroll display.

  In the display example of FIG. 2, the scale SLnf corresponding to the measurement data in the future time region following the current time region of the measurement data displayed in the waveform display region WA near the left end along the time axis of the waveform display region WA. In the above example, the scale SLnb corresponding to the measurement data in the past time area following the current time area of the measurement data displayed in the waveform display area WA is provided near the right end. However, the present invention is not limited to this.

  For example, as shown in FIG. 3, the scale SLn is provided only in the vicinity of the left end along the time axis of the waveform display area WA, and the non-existence of the future time area that is temporally continuous with the display waveform of the waveform display area WA is provided on the left side of the scale SLn. The line segment mmf connecting the maximum value maxf and the minimum value minf of the measurement data in the display part is highlighted as a thick line having the same color as the display color of the measurement signal waveform of the channel CHn having a wide line width so that it can be distinguished from other line segments. A line segment mmb connecting the maximum value maxb and the minimum value minb of the measurement data of the non-display portion of the past time region that is temporally continuous with the display waveform of the waveform display region WA on the right side of the scale SLn is another line segment. So that it can be highlighted as a thick line of the same color as the display color of the measurement signal waveform of the channel CHn having a wide line width.

  Note that the scale SLn is provided only in the vicinity of the right end along the time axis of the waveform display area WA, and the line connecting the maximum value maxf and the minimum value minf of the measurement data of the non-display portion in the future time area is connected as in FIG. The measurement signal of the channel CHn having a wide line width so that the minute mmf and the line segment mmb obtained by connecting the maximum value maxb and the minimum value minb of the measurement data of the non-display portion of the past time region can be distinguished from other line segments. You may make it highlight as a thick line of the same color as the display color of a waveform.

  FIG. 4 is a block diagram showing a specific example of the apparatus of the present invention. In FIG. 4, an analog measurement signal applied to the input terminal 1 is input to the A / D converter 3 via the input unit 2, converted into measurement data, and stored in the data memory 4. The input unit 2 performs amplitude adjustment by amplification or attenuation so that the analog measurement signal falls within an appropriate input range of the A / D converter 3.

  The measurement data stored in the data memory 4 is read out by the display screen generation unit 7 controlled via the display setting unit 5 and the display control unit 6, and a display screen corresponding to each display mode described above is generated. Are displayed on the display unit 8.

  The user operates the display setting unit 5 to select and specify a real time mode or a viewer mode to be displayed on the display unit 8, set a time region to be displayed in the waveform display area WA, specify a measurement channel to be displayed, and display amplitude. Set various display conditions such as range specification. The display control unit 6 controls each unit of the display screen generation unit 7 based on the display conditions set by the display setting unit 5.

  In the display screen generation unit 7, the display partial waveform graph display processing unit 71 generates a display screen to be displayed in the waveform display area WA as shown in FIGS. 1 to 3 based on the measurement data read from the data memory 4.

  The summary display processing unit 72 displays the display waveform of the waveform display area WA displayed near the left and right ends along the time axis of the waveform display area WA as shown in FIGS. 1 to 3 based on the measurement data read from the data memory 4. And a summary display screen composed of a line segment MM connecting the maximum value max and the minimum value min of the measurement data of the non-display portion that is temporally continuous.

  The non-display portion maximum / minimum detection unit 73 displays the maximum value max and the minimum value min of the measurement data of the non-display portion that is temporally continuous with the display waveform of the waveform display region WA in the real time mode, and the display of the waveform display region WA in the viewer mode. The maximum value maxf and the minimum value minf of the measurement data in the non-display part of the future time domain that is temporally continuous with the waveform and the measurement data of the non-display part of the past time domain that is temporally continuous with the display waveform of the waveform display area WA. The maximum value maxb and the minimum value minb are detected and output to the summary display processing unit 72.

  The display mode switching unit 74 selects and designates the real time mode or the viewer mode as the display mode to be displayed on the display unit 8.

  With such a configuration, an outline of measurement data of a non-display portion that is temporally continuous with the display waveform in the waveform display area WA can be appropriately displayed in a limited display screen area.

  In the above embodiment, the example in which the time axis of the display screen is set in the horizontal direction and the horizontal scroll display is described has been described. However, the time axis of the display screen may be set in the vertical direction and the vertical scroll display may be performed. The scroll direction may be arbitrarily switched depending on the application.

  As described above, according to the present invention, the waveform display that can recognize the outline of the measurement data of the non-display portion that is temporally continuous with the display waveform of the waveform display area stored in the data memory without being played back. An apparatus can be realized and is suitable for various waveform measurements.

It is an example of a display screen based on this invention. It is another example of a display screen based on this invention. It is another example of a display screen based on this invention. It is a block diagram which shows the specific example of this invention apparatus. It is a display screen example figure in the conventional paperless recorder.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Input terminal 2 Input part 3 A / D converter 4 Data memory 5 Display setting part 6 Display control part 7 Display screen production | generation part 71 Display partial waveform graph display process part 72 Summary display process part 73 Non-display part maximum / minimum detection part 74 Display mode switching part 8 Display part

Claims (5)

In the waveform display device that displays the change state of the measurement signal on the display screen as a graph waveform with continuous line segments,
When reading a part of the measurement data stored in the data memory and displaying it on the display screen as a graphical waveform,
An overview of the measurement data of the non-display portion in the future time area and the past time area that are continuous in time with the display waveform in the waveform display area is the length of the line segment connecting the maximum value and the minimum value, respectively. A waveform display device comprising a summary display area for displaying in a direction orthogonal to a time axis so as to be identifiable on the same screen as a display waveform . A maximum / minimum detection unit for detecting the maximum value and the minimum value of the measurement data of the non-display part which is stored in the data memory and is continuous in time with the display waveform in the waveform display area;
2. The summary display processing unit according to claim 1, further comprising: a summary display processing unit configured to connect the maximum value and the minimum value of the measurement data of the non-display portion detected by the maximum / minimum detection unit and display in a direction orthogonal to the time axis. Waveform display device. In the vicinity of one end along the time axis of the waveform display area, a summary display area of measurement data of a non-display part in the future time area is provided,
The waveform display device according to claim 1, wherein a summary display region of measurement data of a non-display portion in the past time region is provided in the vicinity of the other end along the time axis of the waveform display region. . A scale corresponding to the measurement data is provided near any end along the time axis of the waveform display region ,
On the future time area side of this scale, a summary display area for measurement data of the non-display part in the future time area is provided, and on the past time area side, an overview display area for measurement data of the non-display part in the past time area is provided. The waveform display device according to claim 1 or 2, wherein   The waveform display device has a real-time mode in which measurement data is sequentially stored in the data memory and displayed on the display screen in real time, and a viewer mode in which a part of the measurement data stored in the data memory is read and displayed on the display screen. 5. The waveform display device according to claim 1, wherein the waveform display device can be selected.

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