JPH05133980A - Waveform display device - Google Patents

Abstract

PURPOSE:To improve a waveform display device in operability and displaying accuracy by displaying an enlarged waveform picture produced based on a set magnification and overall waveform picture in such a way that the pictures are superimposed upon a frame picture and bar graphs. CONSTITUTION:The enlarging magnifications along the time (X) axis and amplitude direction (Y-axis) are set 5 against a display enlarging extent set 4 to waveform data in a memory 3. An enlarged waveform picture is produced 7 from the waveform data in the memory 3 by using the magnifications as parameters. The produced 7 picture is displayed in a frame picture produced 7 and displayed 10 in accordance with the number of frames in the displaying mode together with an overall waveform picture through a picture synthesizing section 9. In addition, bar graphs BGI and BG2 respectively indicating displayable extents and waveform displaying extents on the X- and Y-axes are produced 8 and displayed 10 through the section 9. Therefore, the relation between an enlarged waveform and overall waveform can be clearly recognized and a highly accurate display can be performed by enlarging a waveform amplitude by changing the magnification of the amplitude as required.

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 for displaying waveform data stored in a memory on a display unit. It is about clarification.

[0002]

2. Description of the Related Art As a waveform display device, the measured waveform is A / D
There is a configuration in which a converter converts it into a digital signal and stores it as waveform data in a memory, and then reads the stored waveform data and displays it on a display unit. When observing the changing parts such as the rising and falling of the waveform and the transient region in detail using such a device,
The corresponding portion is enlarged and displayed in the time axis direction while scrolling left and right.

By the way, in performing the enlarged display in the time-axis direction as described above, it is desirable to always be able to clearly grasp which portion of the entire waveform the displayed enlarged portion is located. In this case, it is easy to understand that the entire waveform and the enlarged waveform are displayed on the common screen so as to be compared at the same time, and further the enlarged portion is displayed in association with the entire waveform.

However, the enlarged display in the conventional device of this type is only in the time axis direction and is not considered in the amplitude direction. Therefore, in order to simultaneously display the entire waveform and the enlarged waveform on a common screen for comparison, the waveform data in the amplitude direction must be compressed to, for example, 1/2, and sufficient measurement accuracy cannot be obtained.

Therefore, for example, Japanese Patent Application Laid-Open No. 62-161193.
The device disclosed in the publication is configured to selectively switch between the entire waveform and the enlarged waveform and display the positional relationship between the enlarged waveform and the entire waveform with a cursor.

[0006]

However, according to such a structure, although the cursor is always displayed,
When the enlargement position or the enlargement portion is changed, it is necessary to switch the display screen to the whole waveform and the enlargement waveform as necessary to check the mutual relationship, and the operability is poor. The present invention solves such a problem, and an object thereof is to provide a waveform with excellent operability in which the entire waveform and the enlarged waveform can be simultaneously displayed by allowing the enlargement factor in the amplitude direction to be set arbitrarily. It is to realize a display device.

[0007]

In order to solve such problems, the present invention converts a measured waveform into a digital signal by an A / D converter and stores it as waveform data in a memory, and then stores it. In a waveform display device configured to read the displayed waveform data and display it on a display unit, an expansion range setting unit for setting a display expansion range for the waveform data stored in the memory, and the set display expansion A magnification ratio setting section for setting the magnification ratio in the time axis and amplitude direction of the range,
A frame screen generation unit that generates a frame screen to be displayed on the display unit, a waveform screen creation unit that creates the entire waveform screen and an expanded waveform screen based on the set magnification from the waveform data stored in the memory, and the set display A bar graph that generates a first bar graph that displays the expanded range along the time axis of the frame screen, and a second bar graph that displays the displayable range in the amplitude direction and the waveform display range along the amplitude direction of the frame screen. It is characterized in that it is configured by a generation unit and a screen synthesis unit that superimposes the frame screen, the waveform screen, and the bar graph on the display unit.

[0008]

According to the present invention as described above, the enlarged waveform and the entire waveform are simultaneously displayed in the frames assigned to them,
Further, the display expansion range is displayed by the first bar graph along the time axis of the frame screen, and the displayable range and the waveform display range in the amplitude direction are displayed by the second bar graph along the amplitude direction of the frame screen. .. As a result, the relationship between the enlarged waveform and the overall waveform can be clearly understood from the display screen, and the waveform amplitude can be enlarged and displayed with high accuracy by changing the amplitude magnification as necessary.

[0009]

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 the figure, reference numeral 1 is an input terminal for the measured waveform, which is connected to the A / D converter 2. Reference numeral 3 is a memory for storing the waveform data converted and output from the A / D converter 2. Reference numeral 4 is an enlargement range setting unit for setting a display enlargement range for the waveform data stored in the memory 3, and 5 is an enlargement ratio setting unit for setting the enlargement ratio of the set display enlargement range in the time axis and the amplitude direction. .. A frame screen generation unit 6 generates a frame screen to be displayed on the display unit 10. 7 is memory 3
2 is a waveform screen creating unit that creates an entire waveform screen and an enlarged waveform screen based on a set magnification from the waveform data stored in. Reference numeral 8 denotes a bar graph generation unit, which displays a first bar graph for displaying the set display expansion range along the time axis of the frame screen, a displayable range in the amplitude direction and a waveform display range along the amplitude direction of the frame screen. A second bar graph to be displayed is generated. Reference numeral 9 denotes a screen synthesizing unit, which superimposes the frame screen, the waveform screen, and the bar graph and displays them on the display unit 10.

FIG. 2 is a diagram showing an example of a screen display having the configuration of FIG. 1, showing an example of two frames. In the figure, A is the entire waveform, which is displayed in the lower frame FL.
B is an enlarged waveform and is displayed in the upper frame FU. BG1 is a first bar graph showing the display expansion range set for the entire waveform A, and is displayed along the time axis (X axis) of the lower frame screen FL. BG
Reference numeral 2 is a second bar graph showing the displayable range and the waveform display range in the amplitude direction (Y axis), and the upper frame screen FU
Are displayed along the amplitude direction of.

FIG. 3 is a flowchart related to the enlarged waveform display operation of FIG. The magnification setting unit 5 determines the magnification in the X-axis and Y-axis directions. The waveform screen creation unit 7 has X-axis, Y-axis
The enlarged waveform screen () is generated from the waveform data stored in the memory 3 using the axis magnification as a parameter, and the screen synthesis unit 9
It is displayed on the display unit 10 via.

The bar graph screen generator 8 calculates the display position and display width of the waveform when all the waveform data on the X axis is converted into the X axis width of the frame, and displays the displayable range and the waveform on the X axis. A bar graph BG1 () displaying the range is generated and displayed on the display unit 10 via the screen compositing unit 9. Similarly, a bar graph B for displaying the displayable range and the waveform display range on the Y axis by calculating the display position and the display width of the waveform when converting all the waveform data on the Y axis as the Y axis width of the frame.
G2 () is generated and is displayed on the display unit 10 via the screen synthesis unit 9.
To display.

In an actual device, first, a necessary frame screen to be displayed on the display unit 10 is generated and displayed according to the number of frames (for example, 2) in the display mode set by the frame screen generation unit 6. , The entire waveform of the measurement channel to be displayed in each frame is displayed. Then, while enlarging the entire waveform of the desired measurement channel, the enlarging range setting unit 4 sets the enlarging range of the entire waveform, and the magnification calculation process is executed according to the above-described flowchart of FIG. The frame screen also displays parameters of various measurement conditions on the time axis and the amplitude axis.

As a result, by displaying the same measurement channel on the frame screens FL and FU and displaying the enlarged waveform on the frame screen FU, the display unit 10 displays the frame screens FL and FU as shown in FIG. Waveform screen A, B
The bar graphs BG1 and BG2 are displayed in an overlapping manner, and the mutual relationship between the entire waveform and the enlarged waveform can be accurately grasped and confirmed.

FIGS. 4 and 5 are concrete display examples, respectively. FIG. 4 shows examples of A and B2 frames, and FIG. 5 shows examples of A to D4 frames.

In FIG. 4, two types (1 and 2 channels) of waveforms are displayed in each frame, an enlarged waveform is displayed in the A frame, and an entire waveform is displayed in the B frame. The bar graph display is being executed for the first channel. That is, regarding the time axis (X axis),
The entire waveform displays 0.00 ms to 20.00 ms, and the expanded waveform displays 7.50 ms to 12.50 in between.
ms is magnified 4 times. The bar graph in the time axis direction shows the enlarged portion. On the other hand, with respect to the amplitude axis (Y axis), the overall waveform is from -2,000 V to +2.00.
0 V is displayed, and in the enlarged waveform, −1.800 V to 0.200 V in the meantime is enlarged and displayed twice. The upper limit of the displayable range of the bar graph in the amplitude axis direction indicates +4.00 V, the lower end indicates −4.00 V, and the two lines in the middle indicate −2,000 V and +2.000 V, respectively. The upper end shows an amplitude voltage of 0.200 V in the expanded portion, and the lower end shows an amplitude voltage of 1.800 V in the expanded portion.

In FIG. 5, one type (1 channel or 2 channels) of waveform is displayed in each frame,
In the A frame, the enlarged waveform of channel 1 is displayed,
In the B frame, the enlarged waveform of channel 2 is displayed,
In C frame, the whole waveform of channel 1 is displayed,
In the D frame, the entire waveform of the second channel is displayed. The bar graph display is in progress for the second channel. That is, with respect to the time axis (X axis), 0.00 ms to 20.00 ms is displayed in the entire waveform, and 5.00 ms to 15.00 ms in the meantime is magnified and displayed twice. On the other hand, the amplitude axis (Y
(Axis) is -2,000V to + in the overall waveform
2.000V is displayed, and in the expanded waveform, -0.4 in between
00V to 1.600V are enlarged and displayed twice. The upper limit of the bar graph displayable range in the amplitude axis direction is +4.0.
00V, the lower end shows -4000V, 2 in the middle
The lines show -2,000 V and +2.000 V, respectively, and the upper end of the bar graph has an amplitude voltage of 1.600 at the enlarged portion.
V is shown, and the lower end shows the amplitude voltage −0.400 V of the enlarged portion.

[0018]

As described above, according to the present invention,
A waveform display device having excellent operability can be realized in which the enlargement factor in the amplitude direction can be arbitrarily set and the entire waveform and the enlarged waveform are simultaneously displayed.

[Brief description of drawings]

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

FIG. 2 is a diagram showing a screen display example according to the configuration of FIG.

FIG. 3 is a flowchart related to the enlarged waveform display operation of FIG.

4 is a diagram showing another screen display example according to the configuration of FIG. 1. FIG.

5 is a diagram showing another screen display example according to the configuration of FIG.

[Explanation of Codes] 1 Input Terminal 2 A / D Converter 3 Memory 4 Enlargement Range Setting Section 5 Enlargement Magnification Setting Section 6 Frame Screen Generation Section 7 Waveform Screen Creation Section 8 Bar Graph Screen Creation Section 9 Screen Synthesis Section 10 Display Section

Claims (1)

[Claims] 1. A waveform configured so that a measured waveform is converted into a digital signal by an A / D converter and stored in a memory as waveform data, and the stored waveform data is read and displayed on a display unit. In the display device, an enlargement range setting unit that sets the display enlargement range for the waveform data stored in the memory, an enlargement ratio setting unit that sets the enlargement ratio in the time axis and amplitude direction of the set display enlargement range, A frame screen generation unit that generates a frame screen to be displayed on the display unit, a waveform screen creation unit that creates the entire waveform screen and an expanded waveform screen based on the set magnification from the waveform data stored in the memory, and the set display The first bar graph that displays the expanded range along the time axis of the frame screen, the displayable range in the amplitude direction, and the waveform display range are displayed along the amplitude direction of the frame screen. And a screen synthesis unit for superimposing the frame screen, the waveform screen, and the bar graph on the display unit to display the second bar graph. ..