JP2002267691A - Waveform measuring device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a waveform measuring device indicating text information without falling on a marker. SOLUTION: The waveform measuring device constituted to point an arbitrary position on a display measurement waveform with at least one marker and to indicate text information relating with a digit of the display measurement waveform at the position on the same screen is provided with a means to separate the display screen into a plurality of regions and move the text information to an indication region which does not fall on the marker.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waveform measuring apparatus, and more particularly to a text measuring apparatus configured to display text information related to a numerical value at an arbitrary position designated on a display measurement waveform. It relates to display control.

[0002]

2. Description of the Related Art An arbitrary position on a display measurement waveform is designated by a marker in a type of waveform measurement apparatus, and text information (hereinafter referred to as text information) related to the numerical value of the display measurement waveform at that position is displayed on the same screen. Some are configured to display.

FIG. 8 is a block diagram showing an example of such a conventional waveform measuring device. In the figure, input terminal 1
Is converted into a digital signal by the A / D converter 2 and stored in the memory 3 or the hard disk 4 as waveform data. The CPU 5 controls the operation of each section as a whole and performs various calculations and analysis processes on the waveform data. The operation unit 6
Various setting inputs including indication of an arbitrary position on the display measurement waveform by the marker are performed. The display 7 displays waveform data and analysis processing results.

FIG. 9 is an example of a conventional display screen. The operation unit 6 places the markers M1 and M2 on the displayed waveform W and moves them to an arbitrary position. In the example of FIG. 9, the marker M1 is indicated by a "+" mark, and the marker M2 is indicated by an "x" mark. Then, numerical information (hereinafter referred to as text information) T on the Y-axis and the X-axis of the waveform W at positions indicated by the markers M1 and M2 is displayed.

The text information T shown in FIG.
Are the following seven types. Y +: The amplitude value of the voltage at the position of the marker M1 Y ×: The amplitude value of the voltage at the position of the marker M2 ΔY: (Y +) − (Y ×) X +: The time at the position of the marker M1 XX: The time at the position of the marker M2 ΔX: (X +) − (X ×) 1 / ΔX

[0006]

The display position of the text information in such a conventional waveform measuring apparatus is fixed at a lower right portion of the display screen. For this reason, depending on the state of the display waveform W, for example, as shown in FIG. 10, the marker M2 and the text information T may overlap, and the marker M2 and the numerical information T may be difficult to read.

An object of the present invention is to solve such a conventional problem, and an object of the present invention is to provide a waveform measuring apparatus for displaying text information so as not to overlap a marker.

[0008]

According to a first aspect of the present invention, there is provided a waveform measuring apparatus for indicating an arbitrary position on a display measurement waveform with at least one marker, and displaying the display measurement waveform at that position. In a waveform measuring apparatus configured to display text information related to numerical values on the same screen, a means for dividing the display screen into a plurality of areas and moving the text information to a display area that does not overlap with the marker is provided. It is characterized by.

According to a second aspect of the present invention, in the waveform measuring apparatus according to the first aspect, adjacent divided areas slightly overlap each other.

According to a third aspect of the present invention, in the waveform measuring device according to the first or second aspect, the waveform measuring device is a power waveform analyzing device.

According to a fourth aspect of the present invention, in the waveform measuring device according to the first or second aspect, the waveform measuring device is a digital oscilloscope.

Thus, the text information does not overlap the marker, and the operator can comfortably read the text information related to the waveform at the position designated by the marker. Then, by making the adjacent divided areas slightly overlap each other, a change in the display position of the text information when the marker moves near the boundary of the divided area can be reduced, and a display environment friendly to the operator can be realized. .

[0013]

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, and portions common to FIG. 8 are denoted by the same reference numerals. In FIG. 1, a text information movement processing unit 8 is a characteristic part of the present invention described below.

FIG. 2 is a diagram for explaining the division of a display screen into regions according to the present invention. First, a × (N +
1) Divide into pieces. a: Horizontal resolution coefficient (a ≧ 1, basic is 1) N: Number of all markers (for example, “+” and “×”)

Then, the image is divided into b parts in the vertical direction. b: vertical resolution coefficient (b ≧ 1) where (area of information display area) ≦ (area of divided display screen area).

In the display area shown in FIG. 2, if i is a horizontal area coordinate (column) and j is a vertical area coordinate (row), (1, 1) to (3, It is divided into 6 areas of 2).

A method of determining the position at which the text information T is displayed will be described with reference to the flowchart of FIG. First, the initial display position of the text information T is determined. For example, in FIG. 2, the lower right (3, 2) is set as the initial value.

When the waveform measurement is started, the waveform data is stored in the memory. At this time, the immediately preceding area data of the text information T is stored in the memory.

First, in step ST1, it is determined in which divided area of the display screen the marker M is located.

Next, in step ST2, it is determined whether or not the area where the text information T exists and the area where the marker M exists are the same. If they are not the same area, the process proceeds to the drawing process of step ST5 without changing the display position of the text information T.

In the case of the same area, the process transits to the display position determination routine of the text information T in step ST3. After determining the display position of the text information T, the display position is changed in step ST4. Then, the process proceeds to the drawing process in step ST5.

A method for determining the display position of the text information T will be described. In determining the display position of the text information T, first, a) the horizontal position is determined, and then b) the vertical position is determined.

A) Position determination in the horizontal direction (row) First, a row i in which no other marker M exists is searched. a
Is 1, the horizontal division is the number of markers M + 1, as shown in FIG. 4, so one area is always empty.

The position determination when two or more areas are free will be described with reference to FIG. 1) Move to the column on the left of the area where the text information T is located.
Specifically, assuming that the column where the text information T exists is the i-th column, the (i−1) -th region is selected.

2) If there is no selectable column on the left or if there is a marker M there, select the column on the left. Specifically, assuming that the column in which the text information T exists is the i-th column, the i + 1-th region is selected.

3) If this area cannot be selected for the same reason as above, select the next two columns to the right. 4) If that is not possible, select the two columns to the left. By repeating these steps, an empty row closest to the area where the text information T was initially displayed is selected.

FIG. 6 shows a series of horizontal (row) position determination search routines. The meaning of each variable in FIG. 6 is as follows. i: a column (1, 2, ...) where the current text information T is present sayuu: a search direction (-1 searches on the left side, 1 searches on the right side) n: a column farther from the column where the current text information T exists Number retsu: Column to search for presence of marker M

In step ST1, as the initial setting, the current text information T is searched from a column one row away from the position i, so that 1 is set to n.

In step ST2, "-1" is substituted for "sayuu" in the sense that the search is to be performed on the left side of "i".
Is calculated.

In step ST3, it is determined whether the retsu-th row exists and the marker M does not exist. YES
If (the marker M does not exist), the process proceeds to the column number determination process in step ST6, and NO (the marker M exists).
In the case of, the process transits to Step ST4.

In step ST4, 1 is substituted for sayuu in the sense that the search is on the right side of i, and a column retsu to be searched is calculated.

In step ST5, it is determined whether the retsu-th column exists and the marker does not exist. YES
If (the marker M does not exist), the process proceeds to the column number determination process of step ST6, and NO (the marker M exists).
In the case of, the process returns to step ST2 via step ST7.

In step ST7, since it is not an appropriate column, 1 is added to n in order to search for a column which is further away from i by one.

By searching for the position in the horizontal direction first as described above, it is possible to prevent the position of the text information T from moving up and down in the same column even if the waveform fluctuates sharply in the amplitude direction (vertical direction). Further, by selecting the closest column, even if the position of the text information T moves, the operator can easily follow the position of the text information T with eyes.

In the above description, the horizontal position search is performed from left to right. However, the present invention is not limited to this, and the horizontal position search may be performed from right to left.

B) Determination of Moving Position in Vertical Direction (Row) Next, the position in the vertical direction is determined according to the procedure shown in the flowchart of FIG. First, in step ST1, the waveform data distribution of each row in the determined column is examined. And
In step ST2, the line with the fewest data points is set as the display line of the text information T.

By executing such a search, the horizontal and vertical positions of the area for displaying the text information T can be determined, and the overlap between the text information T and the waveform W can be avoided as much as possible.

Returning to FIG. 3, in step ST4, the display position of the newly determined text information T is stored in the memory.

In step ST5, a marker M and text information T are drawn on the display device according to each display position data.

In the method of deciding the area shown in FIG. 2, the text information T moves violently even if the marker M comes and goes near the boundary by providing a part that overlaps to some extent without clearly cutting the boundary of the divided area. Will not be. This makes the display easier for the operator to see.

[0041]

As described above, according to the present invention,
A waveform measuring device that displays text information so as not to overlap with a marker can be realized, and is suitable for a digital oscilloscope, a power waveform analyzer, and the like.

[Brief description of the drawings]

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

FIG. 2 is a diagram illustrating an example of division of a display screen according to the present invention.

FIG. 3 is a flowchart showing a basic operation of text information positioning processing based on the present invention.

FIG. 4 is an explanatory diagram of text information positioning processing based on the present invention.

FIG. 5 is an explanatory diagram of text information positioning processing based on the present invention.

FIG. 6 is a flowchart showing a horizontal positioning operation of text information according to the present invention.

FIG. 7 is a flowchart showing a text information vertical positioning processing operation according to the present invention.

FIG. 8 is a block diagram illustrating a configuration example of a conventional device.

FIG. 9 is an example diagram of a conventional waveform display screen.

FIG. 10 is another example of a conventional waveform display screen.

[Explanation of symbols]

 Reference Signs List 1 input terminal 2 A / D converter 3 memory 4 HD (hard disk) 5 CPU 6 operation unit 7 display 8 text information movement processing unit M marker T text information W display measurement waveform

Claims (4)

[Claims] 1. A waveform measuring apparatus configured to indicate an arbitrary position on a display measurement waveform with at least one marker and display text information related to a numerical value of the display measurement waveform at the position on the same screen. 3. The waveform measuring apparatus according to claim 1, further comprising a unit that divides the display screen into a plurality of regions and moves text information to a display region that does not overlap the marker. 2. The waveform measuring apparatus according to claim 1, wherein adjacent divided areas slightly overlap each other. 3. The waveform measurement device according to claim 1, wherein the waveform measurement device is a power waveform analysis device. 4. The waveform measuring device according to claim 1, wherein the waveform measuring device is a digital oscilloscope.