JPH05203673A - Method for setting full scale for output waveform of waveform recorder - Google Patents

Abstract

PURPOSE:To set a full scale while classifying it into a pattern wherein the dynamic range is used to the full and a pattern wherein the unit of the scale can be immediately read. CONSTITUTION:The number of graduations 26 which serve as a full scale for output waveforms along the longitudinal direction of an output display medium 19 is set by means of switching operation from a control portion to either a direct read corresponding pattern 24 in which the number of graduations 26 is set to that which corresponds to the number of set unit blocks in the setting mode for the longitudinal direction or a dynamic range pattern 25 in which when the resolving power of an A/D converter 12 is (n)-bit, an integer value, which is obtained when the number 20 of (a) data corresponding to the (n)-bit and being within the range of an integer 2<n> is divided by the number 21 of (b) data corresponding to one scale and predefined on the graduations 26, is set as the number of graduations 26.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for setting a full scale for an output waveform of a waveform recorder, and more specifically, a pattern for maximizing the dynamic range,
The present invention relates to a method of setting a full scale for an output waveform of a waveform recorder capable of setting a full scale by dividing a scale unit into a pattern that can be immediately read and a pattern.

[0002]

2. Description of the Related Art Generally, in a waveform recorder, when a waveform is output and displayed as an image or a print on an output display medium of an output means such as a display or a printer, for example, one scale in the time axis direction which is the horizontal axis ( 1 DIV) is 100 μs, or one scale (1 DIV) in the voltage axis direction, which is the vertical axis.
Is set to 50 mV and used as an index when setting the mode,
Since it is necessary to use it as a scale when reading the data value of the output waveform, it is superposed on the output waveform 2 as shown in FIG. 3 and the range of X in the figure is divided into a grid as a full scale in the vertical axis direction. In many cases, the scale 3 is also output and displayed on the output display medium 1 at the same time (that is, the full scale in the figure is 10 DIV).

Due to such a need, the number of the scales divided and output in a grid pattern is set to a set range (for example, 50).
In order to be able to calculate the full scale immediately from (mV / DIV), the vertical axis may be set to 10 as shown in the figure, or an appropriate number with other divisions may be selected.

This also applies when the full scale in the vertical axis direction is expressed as a percentage. For example, when the full scale indicates "100%", if the number of scales is 10 in the vertical direction, The fact that the scale shows "10%" can be seen in the standing place.

The grid-shaped scales used in this way are used when the waveform data is taken in through the A / D converter, the full scale (resolution) of the A / D converter.
In many cases, the number of corresponding data for one graduation is determined by equally dividing, for example, into 10 equal parts.

This will be explained by taking as an example the case where the input waveform 4 is taken in as the waveform data 9 through the A / D converter 5 having a resolution of 8 bits as shown in FIG. Is 256 dots, the full scale in the vertical axis direction on the output display medium 1 side is "10DI
When “V” is set, for example, a quotient “25” obtained by dividing “250”, which is an approximate value of the 8-bit corresponding data number 6 by “10”, is set as the scale corresponding data number 7, and this is the output display medium 1. It is possible to make one scale 8 in the scale 3 that is evenly divided into 10 in the vertical axis direction.

[0007]

By the way, according to the above-mentioned conventional full scale setting method, it is preferable in that the correlation between the setting range display in the vertical axis direction and the percentage display and the full scale can be easily obtained. Is.

However, in the case where the number of data corresponding to one graduation 7 is predetermined irrespective of the resolution of the A / D converter 5 due to user specifications, etc., the full scale in the vertical axis direction is obtained. In some cases, it may not be possible to set the scale to a well-separated number such as "10" or "20".

Even in such a case, when the full scale at that time is intentionally set under a good number such as "10" or "20", the result is A
The output waveform 2 is output and displayed on the output display medium 1 under the condition that the dynamic range of the D / D converter 5 is wasted to a considerable extent, and there is a disadvantage that the dynamic range cannot be effectively utilized. It was

[0010]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems of the conventional method, and its structural feature is that A / D for digitally converting an input waveform into waveform data.
A D converter, a storage RAM for storing the waveform data fetched through the A / D converter, and an output waveform based on the waveform data are superimposed on a scale divided in a grid pattern and simultaneously displayed on an output display medium. The output display medium is a full scale for the output waveform in the vertical axis direction of the output display medium, the output display medium having at least output means, and a central processing means for integrally controlling the respective constituent parts according to an input operation from the operation part. The number of scales is a direct-reading correspondence pattern set by the number corresponding to the number of setting unit divisions in the setting mode in the vertical axis direction, and an integer 2 ⁿ when the resolution of the A / D converter is n bits. A die for setting an integer value obtained by dividing the n-bit corresponding data number a within the range by the graduation corresponding data number b which is predetermined on the scale as the number. It is to set under the switching operation from the operation unit to any of the dynamic range utilizing pattern.

[0011]

Therefore, when the output waveform is output and displayed on the output display medium of the output means, the operator operates the operating section to read the waveform in good relation in relation to the setting unit classification in the setting mode in the vertical axis direction. Full scale for output waveforms in the vertical axis direction of the output display medium by dividing into two patterns, a direct-reading compatible pattern that can be read and a dynamic range utilization pattern that maximizes the dynamic range of the A / D converter Can be flexibly set.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic configuration diagram as an example of a waveform recorder to which the method of the present invention is applied, and FIG. 2 shows a full scale output waveform realized by using the waveform recorder shown in FIG. It is explanatory drawing which shows a setting pattern typically.

According to these figures, an A / D converter 12 for digitally converting the input waveform 11 into waveform data 23,
A storage RAM 15 for storing the waveform data 23 fetched through the A / D converter 12, and an output display medium by superimposing an output waveform 28 based on the waveform data 23 on a scale 26 partitioned in a grid pattern. An output means 16 including a display 17 and a printer 18 capable of simultaneously outputting and displaying to 19 and a central processing means (I / O port, ROM) for integrally controlling each of these components in accordance with an input operation from the operation unit 14. , C including RAM, etc.
PU) 13 and at least.

The method for setting the output waveform full scale according to the present invention, which is implemented by using the waveform recorder shown in FIG. 1, will be described in more detail with reference to FIG. That is, the input waveform 11 as an analog signal is taken into the main body side as the waveform data 23 which is digitally converted through the A / D converter 12.

In this case, assuming that the resolution of the A / D converter 12 is n bits, the full scale of the A / D converter 12 is an integer 2 ⁿ and the number of n-bit corresponding data is 2.
It means 0.

On the other hand, the number of data corresponding to one scale (hereinafter referred to as the number of DIV compatible data) 21 in the vertical axis direction on the output display medium 19 such as an image screen or recording paper is A / D converter due to user's specifications. If the predetermined number is set independently of the 20 full scale n-bit corresponding data number 20, the n-bit corresponding data number 20 is divided by the DIV corresponding data number 21 to maximize the dynamic range. It is necessary to divide this equally according to the quotient obtained.

Each dividing line 22 written in full scale showing the number of n-bit corresponding data 20 of the A / D converter 12 in FIG. 2 is shown as an example, and in FIG. Indicates that the number of divisions is not equal to 10 or 20 and is divided into 12 equal parts.

Under such a circumstance, when the number of the scales 26, which is the full scale for the output waveform in the vertical axis direction of the output display medium 19, is to be set, the operation unit 14 is used. A direct-reading-compatible pattern 24 that is easy to calculate the full-scale value according to the setting range under the switching operation or to compare with the scale 27 when the full-scale value is 100%.
Dynamic range utilization pattern 25 capable of maximally utilizing the dynamic range of the A / D converter 12
Either of the patterns will be appropriately selected.

That is, when the full scale for the output waveform in the vertical axis direction of the output display medium 19 is to be set under the direct reading corresponding pattern 24, the setting mode in the vertical axis direction (for example, voltage setting). The number of scales 26 is set to match the number of setting unit divisions (for example, the setting unit in increments of 50 mV is 10 divisions).

On the other hand, when the full scale for the output waveform in the vertical axis direction of the output display medium 19 is to be set under the dynamic range utilization pattern 25, the resolution which the A / D converter 12 has is n. When the number of bits is set, the number of integer values obtained by dividing the number n of a-bit corresponding data 20 within the range of integer 2 ^{n by} the number 21 of b-DIV corresponding data which is predetermined in the scale 26. Only the scale 26 will be set.

To explain this pattern division more specifically, if the resolution that the A / D converter 12 has is 11 bits, the number of data corresponding to 11 bits is 20.
Is an integer 2 ¹¹ , that is, its full scale is 2048 dots, and the DIV corresponding data number 21 in the vertical direction is set to 80 dots in advance.

Under such a setting condition, if it is intended to set a full scale with good separation in the vertical axis direction of the output display medium 19, 20 DIV × 80 dots = 1600
The dots, that is, the dynamic range of the A / D converter 12 is used by about 78% to set the direct reading corresponding pattern 24.

A / A is set in the vertical direction of the output display medium 19.
When making full use of the dynamic range of the D converter 12 to set the full scale,
Dot ÷ 80 dots≈24 DIV, that is, the dynamic range of the A / D converter 12 is used approximately 93%, and the dynamic range utilization pattern 25 is set.

Since the present invention is configured as described above, when the output waveform 28 is output and displayed on the output display medium 19 in the output means 16, the operator operates the operation unit 14 to set the vertical axis. There are two types, a direct-reading-compatible pattern 24 that can be read well in relation to the setting unit classification in the direction setting mode, and a dynamic range utilization pattern 25 that maximizes the dynamic range of the A / D converter 12. It is possible to flexibly set the full scale for the output waveform in the vertical axis direction on the output display medium 19 by dividing the patterns and using them by switching them.

[0026]

As described above, according to the present invention, when the output waveform is output and displayed on the output display medium of the output means, the operator operates the operation portion to set the mode in the vertical setting mode. In the output display medium, there are two patterns, a direct-reading-compatible pattern that can be read well in relation to the setting unit classification and a dynamic range utilization pattern that maximizes the dynamic range of the A / D converter. Since it is possible to set the full scale for the output waveform in the vertical axis direction, it is possible to flexibly meet the request of the operator.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram as an example of a waveform recorder to which the method of the present invention is applied.

FIG. 2 is an explanatory view schematically showing a full scale setting pattern realized by the method of the present invention.

FIG. 3 is an explanatory diagram showing an example of a conventional output waveform display pattern.

FIG. 4 is an explanatory diagram schematically showing a full-scale setting pattern according to a conventional method.

[Explanation of symbols]

 11 Input Waveform 12 A / D Converter 13 Central Arithmetic Control Means 14 Operation Section 15 Slage RAM 16 Output Means 17 Display 18 Printer 19 Output Display Medium 20 n-bit Corresponding Data Number (Full Scale) 21 One-Scale Data Corresponding Number 22 Division Line 23 Waveform data 24 Direct reading compatible pattern 25 Dynamic range utilization pattern 26 Scale 27 One scale 28 Output waveform

Claims (1)

[Claims] 1. An A / D converter for digitally converting an input waveform into waveform data, a storage RAM for storing the waveform data fetched through the A / D converter, and an output waveform based on the waveform data. At least output means for displaying the output on the output display medium at the same time by superimposing the scales divided in a grid pattern, and central processing means for centrally controlling these constituent parts in accordance with the input operation from the operation part are provided. The number of scales, which is a full scale for output waveforms in the vertical axis direction of the display medium, is set to the number corresponding to the number of setting unit divisions in the setting mode in the vertical axis direction, the direct reading correspondence pattern, and the A / D when the resolution converter is androgynous n bits, the integer 2 ⁿ predetermined one has graduation corresponding data in n-bit data corresponding to the number of a said scale in the range of An output waveform of a waveform recorder characterized by being set to one of a dynamic range utilization pattern for setting an integer value obtained by dividing by the number b under the switching operation from the operation section. How to set full scale.