JPH07294559A - Waveform display method of waveform recorder - Google Patents

Abstract

PURPOSE:To obtain a waveform display method in which a display screen is divided, and waveforms can be displayed with an arbitrary magnifying power in individual split screens and also, a mark indicating the display range of a waveform displayed in the other split screen is displayed in one split screen so as not to protrude to the outside of a frame even when the waveform in the other divided screen is scrolled. CONSTITUTION:Magnified waveforms D, E can be displayed respectively with arbitrary magnifying powers in an upper-part split screen WU and a lower-part split screen WL which are formed by dividing a display screen, e.g. into the upper part and the lower part. In this case, marks C indicating the display range of the magnified waveform E are displayed in the upper-parts split screen WU on the side of the magnified waveform D, and the marks C are stopped inside the upper-part split screen WU even when the side of the magnified waveform E is scrolled in the direction of a time base.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waveform display method for a waveform recorder, and more particularly, it divides a display screen and displays an input waveform on each divided screen in a predetermined manner. It relates to a display method.

[0002]

2. Description of the Related Art Generally, a waveform recorder of this type has a memory for storing waveform data of an input waveform. For this reason, after the data is captured, the waveform data can be processed to display the input waveform in various modes, for example, by changing the enlargement ratio. In FIG. 5, the same display screen is displayed. An example in which the entire input waveform and a part of the input waveform are enlarged and displayed is shown.

That is, according to this example, the display screen is vertically divided into two, the upper screen WU displays the entire waveform A of the input waveform by the entire waveform data loaded in the memory, and the lower screen WL has the entire waveform A. An enlarged waveform B in which a part of the waveform A is enlarged is displayed.

In this case, on the upper screen WU, a mark C indicating the enlarged position range for displaying the display range of the enlarged waveform B with respect to the entire waveform A is displayed. Normally, this mark C is displayed by two cursors, but it may be displayed by the color or shade of the framed or waveform display. In any case, when the enlarged waveform B displayed on the lower screen WL is scrolled in the time axis direction, the mark C is also moved accordingly. In some cases, the enlarged waveform is displayed on the upper screen WU and the entire waveform is displayed on the lower screen WL.

[0005]

According to this, the whole waveform A can be observed, and at the same time, a part of it can be enlarged to observe its details. Further, since the entire waveform A is displayed on the upper screen WU, even if the enlarged waveform B on the lower screen WL is scrolled, the mark C is displayed on the upper screen WU.
There is no protrusion.

However, in the prior art, the display magnification of one divided screen on which the entire waveform A is displayed is fixed to x1, so that the waveform is blocked when the recording length is long and the frequency is high. It was sometimes too difficult to know what was being displayed.

The present invention has been made to solve the above-mentioned conventional drawbacks, and its object is to divide a display screen and display a waveform on each of the divided screens. It is an object of the present invention to provide a waveform display method for a waveform recorder, in which the waveform can be displayed by arbitrarily setting.

Another object of the present invention is to display a divided screen with a large enlargement ratio in a divided screen with a small enlargement ratio when setting the enlargement ratio for each divided screen and displaying a waveform. A mark indicating the display range of the waveform being displayed is displayed, and as the waveform with a large magnification is scrolled in the time axis direction, the waveform with a small magnification is moved in conjunction with it to move the above mark to the display screen. It is to provide a waveform display method of a waveform recorder which is not deviated from the above.

[0009]

To achieve the above object, the present invention stores an input section including an A / D converter for converting an analog input signal into a digital signal, and waveform data from the input section. A storage unit, a display unit having a display screen such as a CRT, and a central processing unit (CPU) for reading waveform data from the storage unit and displaying the input waveform on the display screen are provided, and instructions from the operation unit are provided. In the waveform recorder in which the display screen is vertically divided into at least two parts and the input waveforms are displayed in a predetermined manner on each of the divided screens, the divided screens are input with different waveform display magnifications. The whole or part of the waveform is displayed.

In this case, in the split screen with the smaller enlargement ratio, the waveform displayed on the split screen with the larger enlargement ratio is relative to the waveform displayed on the split screen with the smaller enlargement ratio. , A waveform indicating a display range is displayed, and the waveform displayed on the split screen with the larger enlargement ratio is scrolled in the time axis direction, so that the mark shows the split screen with the smaller enlargement ratio. If it is out of the range, it is preferable that the waveform displayed on the split screen having the smaller enlargement ratio is scrolled along with the scroll.

[0011]

According to the above configuration, when the display screen is divided into upper and lower parts and the waveform is displayed on each of the divided screens, it is possible to arbitrarily set the enlargement ratio, so that one of the divided screens is displayed. In the case where the displayed entire waveform is crushed due to a long recording length, a part of the waveform can be appropriately enlarged.

Also in this case, since a mark indicating the display range of the enlarged waveform displayed on the other split screen is displayed on that one split screen, the corresponding relationship is known and the other one is displayed. Even if the enlarged waveform of the split screen is scrolled in the time axis direction, one of the split screens is also scrolled in conjunction with it, so that the above mark does not go out of the frame of the screen.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram schematically showing the configuration of the waveform recorder according to this embodiment. According to this, in the waveform recorder, an A / D converter 3 for converting an analog input signal supplied from the input terminal 1 through the input unit 2 into digital waveform data, and an output from the A / D converter 3 Waveform data to be stored, such as RA
A memory 4 composed of M (random access memory), a central processing unit (CPU) 7 as a waveform display means,
A ROM (Read Only Memory) 5 in which an operation program of the CPU 7 is written, and an operation unit 6 for setting a magnification of the waveform display and giving the setting signal to the CPU 7.
And a display unit 8 having a display screen such as a CRT or a plasma display.

After displaying the waveform on the display screen of the display unit 8 after the waveform data is loaded into the memory 4,
Based on the instruction from the operation unit 6, the CPU 7 divides the display screen of the display unit 8 into, for example, an upper divided screen WU and a lower divided screen WL, as shown in FIG.

Then, as shown in the flow chart of FIG. 3, the CPU 7 judges whether or not an instruction for an enlargement ratio has been issued from the operation unit 6, and the divided display screens WU, WL are both displayed in enlarged form. In this case, according to the designated magnification, an enlarged waveform D having a magnification of, for example, 2 is displayed on the upper divided screen WU, and an enlarged waveform E having a magnification of, for example, 5 is displayed on the lower divided screen.

This magnified display is N / 2 when the magnifying power is 2 and N / 5 when the magnifying power is 2 when the total number of display dots in the time axis direction of the display screen is N. The dots are evenly arranged. Further, the waveform data from the memory 4 is read out as appropriate by designating its address range.

In this way, the enlarged waveforms D and E are displayed at a predetermined magnification on each of the divided screens WU and WL. In this case, the divided screen with the smaller enlargement ratio, that is, the upper divided screen in this example. WU has a split screen with a larger magnification,
That is, the enlarged waveform E displayed on the lower split screen WL
A mark C for indicating the display range of is displayed.

The display of the mark C itself and the display of the mark C by the color and shade of the frame or the waveform display are the same as in the conventional example of FIG. 5 described above. In the present invention, even if the enlarged waveform E displayed on the lower split screen WL is scrolled in the time axis direction, the mark C is prevented from appearing outside the frame of the upper split screen WU.

This will be described with reference to the flowchart of FIG. When the enlarged waveform E is scrolled by the operation unit 6, the CPU 7 moves the enlarged waveform E rightward or leftward according to the operation direction and the operation amount. Along with this, the mark C on the upper split screen WU also moves, but when the mark C reaches the right or left frame edge of the upper split screen WU, the CPU 7 instead of stopping the mark C at that position, This time, the enlarged waveform WU displayed on the upper split screen WU is moved to the right or left.

In this way, since the mark C does not go out of the frame from the upper split screen WU, the expanded waveform E of the lower split screen WL is always in any range of the expanded waveform D displayed on the upper split lower surface WU. I know if. It should be noted that the scrolling of the waveform on the display screen is performed by reading the waveform data from the memory 4 and reading the waveform data within a certain range from the same start address while shifting the start address. Further, although the display screen is vertically divided into two in the above embodiment, the present invention can be applied even if the display screen is divided into two or more.

[0021]

As described above, according to the present invention,
The following effects are achieved. That is, according to the invention described in claim 1, the waveforms can be displayed on each divided screen at arbitrary magnifications.

Further, according to the invention described in claim 2, even when it is possible to display the waveforms at arbitrary magnifications on each divided screen as in the invention described in claim 1, any one of them can be displayed. On one of the split screens, a mark indicating the display range of the waveform displayed on the other split screen is displayed, which is convenient for observing the waveform and understanding the correspondence between the waveforms on both split screens. .

Further, according to the invention of claim 3,
Even if the waveform displayed on the other split screen is scrolled, the mark does not disappear from the one split screen, so that the scroll operation can be freely performed.

[Brief description of drawings]

FIG. 1 is a block diagram schematically showing the configuration of a waveform recorder according to an embodiment of the present invention.

FIG. 2 is a schematic diagram showing a display example of a waveform according to the present invention.

FIG. 3 is a flowchart for explaining a waveform display according to the present invention.

FIG. 4 is a flowchart for explaining waveform display according to the present invention.

FIG. 5 is a schematic diagram showing an example of a conventional display screen.

[Explanation of symbols]

 1 Input Terminal 2 Input Section 3 A / D Converter 4 Memory (RAM) 5 ROM 6 Operation Section 7 CPU 8 Display Section

Claims (3)

[Claims] 1. An input section including an A / D converter for converting an analog input signal into a digital signal, a storage section for storing waveform data from the input section, and a display section having a display screen such as a CRT. A central processing unit (CPU) for reading the waveform data from the storage unit and displaying the input waveform on the display screen, and the display screen is vertically divided into at least two parts based on an instruction from the operation unit, In a waveform recorder in which the input waveform is displayed on a split screen in a predetermined manner, the split screen may display all or part of the input waveform at different waveform display magnifications. Characteristic waveform recorder waveform display method. 2. A portion of the input waveform is displayed on each of the divided screens with a predetermined enlargement ratio, and a divided screen having a smaller enlargement ratio is displayed on a divided screen having a larger enlargement ratio. 2. The waveform recorder according to claim 1, wherein a mark indicating a relative display range with respect to the waveform displayed on the split screen having the smaller enlargement ratio of the displayed waveform is displayed. Waveform display method. 3. When the waveform displayed on the split screen with the larger enlargement ratio is scrolled in the time axis direction, and when the mark deviates from the split screen with the smaller enlargement ratio, the same enlargement is performed. 3. The waveform display method for a waveform recorder according to claim 2, wherein the waveform displayed on the split screen having the smaller magnification is scrolled along with the scroll.