JP2003302424A - Waveform display device and waveform display method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a waveform display device and a waveform display method capable of estimating easily the magnification ratio of a magnified waveform. <P>SOLUTION: In this waveform display device, a display screen of a display part is divided at least in two, and a waveform and a plurality of cursors are displayed on the display screen on one side, and a waveform acquired by magnifying the waveform on a part enclosed by the plurality of cursors is displayed on the display screen on the other side. The device is characterized by being provided with a marker display processing means for displaying or not displaying a marker corresponding to the magnification ratio of the magnified waveform, near the plurality of cursors displayed on the display screen on one side of the display part. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waveform display device and a waveform for dividing a display screen, displaying a waveform on one screen, and enlarging and displaying a waveform of a portion designated on one screen on the other screen. It is related to the display method, for details,
The present invention relates to a waveform display device and a waveform display method capable of easily estimating the enlargement ratio of an enlarged waveform.

[0002]

2. Description of the Related Art A waveform measuring device measures a waveform to be measured,
The result of this measurement is stored in memory as waveform data,
The waveform data stored in the memory is processed and displayed on a display screen, and examples thereof include a digital oscilloscope and an analyzing recorder.

The waveform display device used in this waveform measuring device, for example, divides the display screen into two, displays the whole waveform or a part of the waveform of the waveform data on the upper screen, and specifies it on the lower screen by the cursor on the upper screen. It is also possible to magnify the waveform of the displayed portion and display it in more detail. The enlargement ratio is, for example, 2 times, 5 times, 10 times, 20 times,
It is provided at intervals of 50 times and 100 times. Such a device is described in, for example, Japanese Patent Application Laid-Open No. 7-120502.

5 and 6 show display examples of the display screen of the display section in the conventional waveform display device. 5 and 6
In, the display screen is divided into upper and lower two screens, the horizontal axis represents time, and the vertical axis represents signal level.

First, in FIG. 5, the upper screen 1 displays the entire waveform 101 of the waveform data loaded in the memory. The lower screen 2 is the entire waveform 101 of the upper screen 1.
The enlarged waveform 102 in which a part of the above is enlarged along the time axis is displayed. The rectangular box 3 is surrounded by the two cursors 3 a and 3 b displayed on the upper screen 1 and the vertical axis of the upper screen 1, and the portion surrounded by the rectangular box 3 becomes the enlarged waveform 102.

Next, FIG. 6 will be described. here,
The same parts as those in FIG. 5 are designated by the same reference numerals and the description thereof will be omitted.
6, an enlarged waveform 103 is an enlargement of the entire waveform 101 surrounded by the rectangular box 3 on the upper screen 1, and is displayed on the lower screen 2 at a greater enlargement ratio than the enlarged waveform 102 shown in FIG. There is.

[0007]

Generally, when the waveform data stored in the memory has a long memory length or the frequency of the waveform to be measured is high, a procedure for searching a desired observation portion from the entire waveform 101 is used. First, as shown in FIG. 5, the rectangular box 3 is moved along the time axis of the entire waveform 101 while looking at the enlarged waveform 102 in a state where the enlargement ratio is low (2 to 20 times), and an observation portion is searched for. Then, the magnifying power is gradually increased at a desired observation portion, magnified at an appropriate magnifying power (50 times, 100 times) as shown in FIG. 6, and observation is performed with the magnified waveform 103 displayed in detail. .

At this time, the observer sees the enlarged waveforms 102 and 103.
Is estimated from the ratio of the horizontal width of the upper screen 1 and the horizontal width between the cursors 3a and 3b of the rectangular box 3. For example, when the enlargement ratio is low as shown in FIG. 5, the observer can guess the enlargement ratio without making a mistake, but as shown in FIG. 6, when the enlargement ratio increases to 50 times or 100 times, the cursors 3a and 3b move. The width is narrower in the horizontal axis direction, and the lines become almost linear, and the expansion ratio of the expanded waveform 103 is 50 times or 100.
It's hard to guess if it's double.

Therefore, an object of the present invention is to realize a waveform display device and a waveform display method that can easily estimate the enlargement ratio of an enlarged waveform.

[0010]

The invention according to claim 1 is
The display screen of the display unit is divided into at least two, one display screen displays the waveform and a plurality of cursors, and the other display screen displays a waveform obtained by enlarging the waveform of the portion sandwiched by the plurality of cursors. In the waveform display device, a marker display processing unit that displays or does not display a marker according to the enlargement ratio of the enlarged waveform is provided near the plurality of cursors displayed on one display screen of the display unit. It is characterized by.

According to a second aspect of the present invention, in the first aspect of the present invention, the marker display processing means changes the shape or the brightness of the marker for each enlargement ratio and displays it.

The invention according to claim 3 is the invention according to claim 1 or 2.
In the invention described above, the marker display processing means is characterized by displaying a marker whose enlargement ratio is represented by a number.

The invention according to claim 4 is characterized in that, in the invention according to any one of claims 1 to 3, the invention is used for a waveform measuring device.

According to a fifth aspect of the present invention, the display screen of the display unit is divided into at least two parts, one display screen displays the waveform and a plurality of cursors, and the other display screen is sandwiched by the plurality of cursors. In a waveform display method of displaying a waveform obtained by enlarging the waveform of a part, in the vicinity of the plurality of cursors displayed on one display screen of the display unit, a marker is displayed according to the enlargement ratio of the enlarged waveform or The method is characterized by non-display.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the present invention. In FIG. 1, a measuring section 10 receives a measured waveform, converts the measured waveform into waveform data which is a digital signal, and outputs the waveform data. The waveform data of the measurement unit 10 is input to the memory 20. The operation unit 30 is a button, a rotary knob, or the like, and outputs the enlargement ratio and the setting condition of the enlarged portion.

The display processing unit 40 has a marker display processing unit 41, and displays a desired waveform on the display screen of the display unit 50 based on the waveform data of the memory 20 and the setting conditions of the operation unit 30.

Further, the marker display processing means 41 discriminates the magnitude of the enlargement ratio set by the operation section 30, and displays the marker on the display screen of the display section 50 according to the discrimination result.

Next, the operation of the device shown in FIG. 1 will be described. The measuring section 10 attenuates or amplifies the input measured waveform as necessary, converts the waveform into a digital signal, and stores the converted digital signal in the memory 20 as waveform data.

On the other hand, the observer inputs the enlargement ratio and the setting conditions regarding the enlarged portion to the display processing unit 40 through the buttons and the rotary knob of the operation unit 30.

Then, the display processing section 40 reads the waveform data from the memory 20. The operation that the display processing unit 40 causes the display unit 50 to display will be described with reference to the flowchart shown in FIG. In addition, a display example of the display screen of the display unit 50 is shown in FIG.
Shown in. Here, the same parts as those in FIG. 6 are designated by the same reference numerals and the description thereof will be omitted.

Returning to the explanation of the flow chart of FIG. 2, first, the display processing section 40, like the conventional waveform display apparatus,
As shown in FIGS. 3 and 5, the upper screen 1 displays the entire waveform 101 and the cursors 3a and 3b based on the setting conditions of the operation unit 30, and the lower screen 2 displays the enlarged waveform 102 of the portion sandwiched between the cursors 3a and 3b. , 103 are displayed (S10).

Subsequently, the marker display processing means 41 determines the magnitude of the enlargement ratio set by the operation unit 30. For example, it is determined that the enlargement ratio is small up to the enlargement ratio of 50 times. Then, when the marker display processing means 41 determines that the enlargement ratio is small, the marker display processing means 41 ends the processing (S11).

The marker display processing means 41 is the operation unit 30.
When it is determined that the enlargement ratio (for example, 100 times) set in step 1 is large, as shown in FIG. 3, arrows Mrk, which are markers, are provided near the cursors 3a and 3b on the upper screen 1, respectively.
1 and Mrk2 are displayed (S11, S12).

As described above, the marker display processing means 4 of the display processing unit 40 is applied to the enlargement ratio set by the operation unit 30.
1 determines the enlargement ratio. Then, based on the result of this determination, the arrows Mrk1, Ma are displayed on the display screen of the display unit 50.
Since k2 is displayed, the arrow Mr
k1 and Mrk2 are displayed or hidden. Thus, even if it is difficult to estimate the enlargement ratio, for example, 50 times or 100 times from the horizontal axis of the upper screen 1 and the widths of the cursors 3a and 3b, the enlargement ratio can be estimated by the arrows Mrk1 and Mrk2. it can. Therefore, the enlarged waveform 10
The enlargement ratio of 2, 103 can be easily estimated.

Further, the enlargement ratio becomes large, and the cursor 3
When a and 3b are close to each other, the width in the horizontal axis direction is narrowed to almost form a line, and the entire waveform 101 and the cursor 3 are displayed.
There is a problem that it becomes difficult to distinguish between a and 3b and it becomes difficult to confirm the enlarged portion. However, when the enlargement ratio becomes large, the arrows Mr appear near the cursors 3a and 3b.
Since k1 and Mrk2 are displayed, it is possible to easily confirm which part is enlarged. In particular, when the display screen of the display unit 50 or the display screen of an external device (not shown) to be displayed via a communication line or media is not a color screen,
Alternatively, when the display screen of the display unit 50 is printed in black and white by a monochrome printer (not shown), the position of the enlarged portion can be easily confirmed.

The present invention is not limited to this, but may be as follows. The marker display processing means 41 uses the cursors 3a and 3b when the enlargement ratio is large.
Although the arrows Mrk1 and Mrk2 are displayed in the vicinity, it is also possible to display a marker Mrk3 that displays the enlargement ratio as a number as shown in FIG. Here, the same components as those in FIG. 3 are designated by the same reference numerals, and the description thereof will be omitted.

In FIG. 4, the marker Mrk3 is displayed in the vicinity of the cursor 3b together with the arrow Mrk2, and represents the enlargement ratio of the enlarged waveform 103 by a numeral. From this point of view, the observer can grasp the accurate enlargement ratio and the enlarged portion of the entire waveform 101 without changing the viewpoint. of course,
Without displaying the markers Mrk1 and Mrk2, the marker M
You may display only rk3.

When the enlargement ratio is large, the shapes of the markers displayed near the cursor are arrows Mrk1 and Mrk2.
However, a triangle or the like may be used.

Further, as an example of the enlargement ratios of the enlarged waveforms 102 and 103, 2 times, 5 times, ..., 100 times, but the magnification intervals of the enlargement ratio may be arbitrary, and further larger enlargement ratios. It may be (200 times, 500 times).

Also, an example has been shown in which the marker display processing means 41 determines that the enlargement ratio is large by 100 times.
The magnification may be determined to be large from any number of times, for example, from 50 times. In this case, 50 times and 100
The markers displayed near the cursors 3a and 3b may be changed for each enlargement ratio in order to distinguish the magnification. For example, (A)
A triangle is multiplied by 50 and arrows Mrk1 and Mrk2 are multiplied by 100. (B) Depending on the enlargement ratio, the arrows Mrk1 and Mrk2
Change the size of. (C) Depending on the enlargement ratio, the display unit 50
The brightness of the arrows Mrk1 and Mrk2 displayed on the display screen may be changed.

Further, although the configuration is shown in which the expansion is performed along the time axis, the configuration may be expanded along the signal level.
In this case, the cursor is displayed vertically (parallel to the horizontal axis) with respect to the cursors 3a and 3b.

Further, in the waveform analysis, a cursor is sometimes used to specify the range to be analyzed. Even if the cursors Mrk1 and Mrk2 are displayed near the cursor, the position of the cursor can be easily confirmed. Good.

[0033]

The present invention has the following effects. According to claims 1 to 4, the marker display processing means,
Markers are displayed or hidden near a plurality of cursors displayed on one display screen in accordance with the enlargement ratio. As a result, when the enlargement ratio of the enlarged waveform becomes large, the enlargement ratio can be estimated by the marker as well as by comparing the horizontal axis of one display screen with the widths of the plurality of cursors. Therefore, the expansion rate of the expanded waveform can be easily estimated.

Further, when the enlargement ratio becomes large, it becomes difficult to distinguish the whole waveform displayed on one display screen from a plurality of cursors, and it becomes difficult to confirm the enlarged portion. Markers are displayed or hidden near a plurality of cursors displayed on one display screen according to the rate. Thereby, even if the enlargement ratio of the enlarged waveform is increased, it is possible to easily confirm which part of the entire waveform is enlarged by the marker.

Further, according to the second aspect, the marker display processing means changes and displays the shape or the brightness of the marker for each enlargement ratio, so that the enlargement ratio of the enlarged waveform can be easily estimated.

Further, according to the third aspect, the marker display processing means displays the marker, which represents the enlargement ratio by a numeral, in the vicinity of the cursor. Therefore, the enlargement ratio of the enlarged waveform can be easily grasped and the viewpoint can be changed. It is also possible to check the enlarged portion without doing so.

Further, according to the fifth aspect, the marker is displayed or not displayed in the vicinity of the plurality of cursors displayed on one display screen of the display unit according to the enlargement ratio of the enlarged waveform. This makes it possible to estimate the enlargement ratio with or without displaying the marker. Therefore, the expansion rate of the expanded waveform can be easily estimated.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of the present invention.

FIG. 2 is a flowchart showing the operation of the display processing unit 40.

FIG. 3 is a first display example when the enlargement ratio in the device shown in FIG. 1 is large.

FIG. 4 is a second display example when the enlargement ratio in the device shown in FIG. 1 is large.

FIG. 5 is a display example when the enlargement ratio is small in the conventional waveform display device.

FIG. 6 is a display example when the enlargement ratio is large in the conventional waveform display device.

[Explanation of symbols]

41 Marker display processing means 50 display

Claims (5)

[Claims] 1. A display screen of a display unit is divided into at least two parts, one display screen displays a waveform and a plurality of cursors, and the other display screen enlarges the waveform of a portion sandwiched by the plurality of cursors. In a waveform display device for displaying a waveform, a marker display process for displaying or hiding a marker in the vicinity of the plurality of cursors displayed on one display screen of the display unit according to the enlargement ratio of the enlarged waveform. A waveform display device comprising means. 2. The waveform display device according to claim 1, wherein the marker display processing means changes and displays the shape or the brightness of the marker for each enlargement ratio. 3. The waveform display device according to claim 1, wherein the marker display processing means displays a marker whose enlargement ratio is represented by a number. 4. The waveform display device according to claim 1, which is used in a waveform measuring device. 5. A display screen of a display section is divided into at least two, one display screen displays a waveform and a plurality of cursors, and the other display screen enlarges the waveform of a portion sandwiched by the plurality of cursors. In the waveform display method for displaying the waveform, a marker is displayed or not displayed in the vicinity of the plurality of cursors displayed on one display screen of the display unit according to the enlargement ratio of the enlarged waveform. Waveform display method.