JP3100425B2 - Waveform display method for waveform recorder - Google Patents

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 in a waveform recorder, and more particularly, to a screen moving method for scrolling a display screen.

[0002]

2. Description of the Related Art In a waveform recorder, an analog input signal is converted into digital waveform data by an A / D converter and sequentially written into a storage memory. The waveform is displayed on a display unit such as a CRT.

In such a case, as shown in FIG.
A line cursor L is displayed movably on the RT 1 together with the signal waveform 2.

[0004]

The signal waveform 2 and the line cursor L are relatively movable. However, when the line cursor L is generally moved, the signal waveform 2 does not move. For example, a voltage value of a predetermined portion of the intersecting signal waveform 2 is displayed on the CRT 1.

However, when the signal waveform 2 is scrolled, the line cursor L also moves accordingly.
Depending on the scroll amount, the line cursor L is
1, and the position of the line cursor L cannot be determined.

When the user wants to see the signal waveform near the line cursor L, the user scrolls in the reverse direction. However, since the position of the line cursor L is not known, the direction is wrong. There were problems such as a long scrolling time.

[0007]

SUMMARY OF THE INVENTION This invention has been made in view of the above conventional circumstances, features on its configuration, A / D converting an analog input signal to a digital waveform data
A conversion unit, a storage memory for storing the waveform data, a waveform display unit for displaying a signal waveform based on the waveform data in the storage memory, the A / D conversion unit,
A control unit (CPU) for controlling each part of the storage memory and the waveform display unit, wherein the waveform display unit includes a screen recorder in which a line cursor is displayed so as to be movable together with a signal waveform ; Have and above
The CPU writes the waveform display section to the storage memory.
Total waveform data length display area indicating the total waveform data length stored
And set the line card in the same waveform data length display area.
The current position is displayed on the mark indicating the position of the
The indicated waveform data is stored in the storage memory.
Storage area to be displayed, and an instruction from the screen movement instruction means.
Upon receiving the signal, centered on the current position of the upper Symbol line cursor
Waveform data displayed on one screen as the above storage
Read from memory and display the line cursor on the waveform display
Display the waveform data for one screen above with the
Lies in the fact that.

[0008]

FIG. 1 is a schematic block diagram of the waveform recorder. According to this, the companion recorder includes an A / D converter 11 for converting an analog input signal into a digital signal, a storage memory 12 for storing a digital signal (waveform data) from the A / D converter 11, and a ROM / RA that stores recorder system programs, etc.
M including main memory 13 and CPU 14 as a control unit
And a CRT 15 as a display unit for displaying a signal waveform obtained from the waveform data stored in the storage memory 12.
And

The CPU 14 controls the conversion operation of the A / D converter 11, the read / write operation of the storage memory 12 and the main body memory 13, the display operation of the CRT 15, and the like.
In this case, screen movement instructing means 16 is connected to the CPU 14. In this embodiment, the same screen movement instructing means 1
6, one of the push buttons on the keyboard (not shown) is assigned as a screen movement key.

FIG. 2 shows the screen of the CRT 15 when the line cursor L is hidden outside the screen. In the present invention, when the screen moving key 16 is pressed, as shown in FIG. In addition, a line cursor L appears on the CRT 15 with a signal waveform 2 in the vicinity thereof.

In this case, the line cursor L is displayed at the center of the CRT screen. This will be described with reference to flowcharts of FIGS. 4 and 5 in which addresses of the storage memory 12 are schematically illustrated.

When the screen shift key 16 is pressed, the CPU 1
4 obtains the head address on the screen of the CRT 15 from the current position of the line cursor L.

That is, the current position of the line cursor L corresponds to the address m of the storage memory 12, and
Assuming that the waveform data for the α address is displayed on one screen of T5, the CPU 4 sets the waveform data at address m−α / 2 as the top address on the screen and stores the waveform data up to address m + α / 2. The data is read from the memory 12, subjected to a predetermined operation, and displayed on the CRT 15.

According to the present invention, the CRT 15 stores the currently displayed signal waveform 2 in the storage memory 1.
2, the storage area and the position of the line cursor L are displayed.

That is, under the display control of the CPU 14,
The CRT 15 displays an entire waveform data length display area A indicating the entire waveform data length stored in the storage memory 12, and stores the waveform data of the signal waveform 2 currently displayed on the CRT 15 in the display area A. The area B is displayed in the form of a bar graph.

An arrow C indicating the position of the line cursor L is displayed along the entire waveform data length display area A.

FIG. 2 shows that the line cursor L is hidden on the right side of the CRT 15 because the arrow C is displayed on the right side of the storage area B.

On the other hand, FIG.
By pressing, the line cursor L moves to the center of the CRT 15 and, at the same time, the signal waveform 2 in the vicinity moves to the CRT 15. That is, when the arrow C is within the storage area B, the line cursor L is displayed on the CRT 15.

In the above embodiment, the entire waveform data length display area A
And storage area B are displayed in the form of a bar graph,
The display mode is not limited to this. Also,
Although the case where the number of line cursors L is one has been described, the present invention can be applied to the case where there are two line cursors.

[0020]

As described above, according to the present invention, all the waveforms stored in the storage memory are stored in the waveform display section.
A total waveform data length display area indicating the data length is set, and
The waveform data currently displayed in the total waveform data length display area of
Mark indicating the data storage area and the position of the line cursor
Displayed, so that the line cursor is
The line cursor is
You can easily see if it is hidden by the device.

Further , for example, a screen movement instruction is given by a push button or the like.
The screen can be switched and the waveform
Wave of one screen with the line cursor almost at the center of the display
Time required for scrolling because shape data is displayed
It is greatly shortened, and the operation error is eliminated.

[Brief description of the drawings]

FIG. 1 is a schematic block diagram of a waveform recorder to which the present invention is applied.

FIG. 2 is a screen view of a CRT showing an example of a state in which a cursor is hidden.

FIG. 3 is a CRT with a cursor moved to the center of the screen.
Screen diagram of.

FIG. 4 is an explanatory diagram schematically showing addresses of a storage memory.

FIG. 5 is a flowchart for explaining the operation of the present invention.

FIG. 6 is a CRT screen view for explaining a conventional example.

[Explanation of symbols]

 2 signal waveform 11 A / D converter 12 storage memory 13 ROM / RAM 14 CPU 15 CRT 16 screen movement key L line cursor

──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Naoki Ooi 81, Sakuramachi, Koizumi, Ueda-shi, Nagano Prefecture Inside of Hioki Electric Co., Ltd. (56) References JP-A-62-161193 (JP, A) (58) Survey Field (Int.Cl. ⁷ , DB name) G01R 13/00-13/42 G09G 5/08 G09G 5/36

Claims (1)

(57) [Claims] 1. An A / D converter for converting an analog input signal into digital waveform data, a storage memory for storing the waveform data, and a waveform for displaying a signal waveform based on the waveform data in the storage memory. A display unit,
A control unit (CPU) that controls each unit of the A / D conversion unit, the storage memory, and the waveform display unit;
The waveform display unit has a screen recorder in which a line cursor is displayed so as to be movable together with a signal waveform.
Length of all waveform data stored in the storage memory
Set the full waveform data length display area indicating
Mark indicating the position of the line cursor in the data length display area
And the waveform data currently displayed in the waveform display section
Display the storage area for the above storage memory of
When receiving an instruction signal from the screen movement instruction means,
The current position of the in-cursor is displayed on one screen
Waveform data from the storage memory, and
Set the line cursor on the waveform display
A waveform display method in a waveform recorder, wherein one screen of waveform data is displayed .