JPH07286865A - Method for displaying measurement data on graphic display section - Google Patents

Abstract

PURPOSE:To alternately display bar graphs by making input signals to be measured from one channel in the row direction of displaying time bases which become even multiples of unit time to correspond to input signals to be measured from the other channel in the row direction of the displaying time bases which become odd multiples of the unit time. CONSTITUTION:A multichannel graphic display device writes input signals to be measured from, for example, thermocouple temperature sensors (a) and (b) provided to two channels in a RAM through an A/D converter which converts the input signals into the corresponding digital measurement data and displays the historical graph corresponding to the relation between the time and measured value corresponding to the measurement data read out from the RAM as bar graphs constituted of line- and row-dot patterns. The display device alternately displays the bar graphs corresponding to the input signals to be measured from one channel in the row direction of displaying time bases which become even multiples of unit time and the bar graphs corresponding to input signals to be measured from the other channel in the row direction of displaying time bases which become odd multiples of the unit time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for displaying measurement data on a graphic display unit, and more specifically, it provides a graphic display unit with input signals to be measured from two channels which are appropriately selected in a multi-channel graphic display device. The present invention relates to a method of displaying measurement data on a graphic display unit that can easily distinguish the two as a bar graph and display them simultaneously.

[0002]

2. Description of the Related Art When the input signals to be measured from two channels are simultaneously output and displayed as a waveform A and a waveform B on a CRT screen provided in a multi-channel graphic display device in the same gradation and color tone, a boundary region of overlapping portions is displayed. However, as a result, the waveform on either side disappears from the CRT screen.

Therefore, in a multi-channel graphic display device having a CRT screen, a waveform A corresponding to an input signal to be measured from a channel on one side shown in FIG. 6A and the other shown in FIG. The waveform B corresponding to the input signal to be measured from the side channel is displayed on the CRT screen 21 at the same time with different display tones and colors as shown in (c), so that these can be identified. The method was taken.

[0004]

By the way, the CRT screen 21 with different display gradations and color tones as in the above-mentioned conventional method is used.
When displayed above, the waveform A and the waveform B can be easily compared.

However, the above-mentioned conventional method uses the CRT screen 21.
When it is possible to display with different display gradations and color tones, the liquid crystal display element (LC
It is inconvenient to apply the method to a graphic display section including a monochromatic / grayless display means such as D).

[0006]

The present invention has been made in view of the above problems found in the prior art, and its structural feature is that input signals to be measured from two appropriately selected channels are measured. It is converted into corresponding digital measurement data, and a time-measurement value progress graph is displayed in rows (x-axis) and columns (y
In a multi-channel graphic display device that displays a bar graph composed of a dot pattern on the graphic display unit, the length of the display time axis in the row direction is a multiple of the unit time, and the display time is For the graphic display unit fixed to a predetermined time value,
The column direction of the display time axis that is an even multiple of the unit time is the display area of the bar graph based on the measured input signal from one channel, and the column direction of the display time axis that is an odd multiple is the measured direction from the other channel. The display area is a bar graph based on an input signal, and measurement data is alternately displayed as a bar graph in each of these display areas every unit time.

[0007]

Therefore, for the graphic display unit, the bar graph corresponding to the input signal to be measured from one channel is arranged in the column direction of the display time axis which is an even multiple of the unit time,
The bar graphs corresponding to the measured input signal from the other channel can be alternately displayed in the column direction of the display time axis that is an odd multiple of the unit time.

Therefore, the entire waveform based on the input signal to be measured from one channel is displayed as an odd multiple of the unit time in the entire bar graph displayed in the graphic display unit as an even multiple of the unit time. The entire bar graph displayed can display the entire waveform based on the measured input signal from the other channel while facilitating mutual discrimination.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram showing an example of a schematic configuration of a multi-channel graphic display device used for carrying out the present invention. Temperatures such as thermocouple temperature sensors provided in appropriately selected two channels are shown. Predetermined sensors a and b including sensors, A / D converters 11a and 11b for converting respective measured signals input from the sensors a and b into corresponding digital measurement data, and the A / D converters 11a and 11b. RAM 1 in which the measured data digitized via the CPU is written under the control of the CPU 12.
3 and a time-measurement value progress graph corresponding to the measurement data read from the RAM 13, a bar composed of a dot pattern of rows (x-axis) and columns (y-axis) as shown in FIG. The graph 16a, 16b is configured as a whole by at least including a graphic display unit 14 including a liquid crystal display element (LCD) displayed on the display screen 15.

In this case, the graphic display unit 14
Is formed such that the length of the display time axis in the row (x-axis) direction is a multiple of the unit time and the display time is fixed to a predetermined time value. That is, if the display time of the graphic display unit 14 is fixed to 24 hours and the length of the display time axis is 240 dots (resolution), the unit time is 6 minutes (6 minutes / 1 dot). . The graphic display unit 14 includes a liquid crystal display element (LC
D) can be preferably used, but in addition to this, a progress graph of time-measured values can be displayed as a bar graph composed of dot patterns of rows (x axis) and columns (y axis). For example, a display means such as a plasma display may be used.

Next, an embodiment of the method of the present invention applied to the above apparatus will be described with reference to the flow chart shown in FIG.

That is, the respective input signals to be measured from the sensors a and b provided in the two appropriately selected channels are A
The measured data after being digitized by passing through the / D converters 11a and 11b is converted into a predetermined memory area of the RAM 13 under the control of the CPU 12, for example, (a) in FIG.
Waveform A and waveform B of FIG. 4A.

After the measurement data (waveform A, waveform B) is written in the RAM 13 in this way, first, the x-axis coordinate of the plotting position, that is, the unit time is temporarily set to 6 minutes, and the graphic display unit 14 displays. The length of the display time axis is 24
If it is 0 dot (resolution), it will be investigated what number dot (x-axis coordinate) is located in 240 dots which is the length of the display time axis.

Thus, after the x-axis coordinate of the plotting position is checked and the dot position is specified, whether the specified x-axis coordinate is even or odd, that is,
It is determined whether the quotient obtained by dividing the specified dot position (x-axis coordinate) by the unit time (for example, 6 minutes) is an even number or an odd number. In this case, for example, a flip-flop whose output state changes at intervals of 6 minutes is provided, and the x-axis coordinate of the position plotted according to the output state at that time corresponds to one channel or the other channel. Alternatively, it may be determined whether or not it corresponds.

In the determination step, the x-axis coordinate is an even number, that is, the waveform A in FIG.
When it is determined that the dot position is to be displayed as, the y-axis data on the specified x-axis coordinate is specified as the x-axis coordinate of the measurement data based on the measured input signal from the sensor a. The bar graph 16a forming the waveform A ′ is read at a predetermined position on the display screen 15 which is a display area determined based on the x-axis coordinate position and the y-axis data specified in this way. Will be plotted.

On the other hand, in the discriminating step, the x-axis coordinate, that is, the waveform B in FIG.
When it is determined that the dot position is to be displayed as, the x-axis coordinate of the measurement data based on the measured input signal from the sensor b is specified, and the y-axis data on the specified x-axis coordinate is determined. The bar graph 16b forming the waveform B ′ is read at a predetermined position on the display screen 15 which is a display area determined on the basis of the x-axis coordinate position and the y-axis data thus specified. Will be plotted.

In this way, by repeating the same processing until the limit length of the display time axis provided in the graphic display unit 14, the measurement data of one channel and the other channel of each channel are displayed in each display area. As a result of alternately displaying the measurement data as the bar graphs 16a and 16b, the waveform A'which is a set of bar graphs 16a and the waveform B'which is a set of bar graphs 16b as shown in FIG. 5 are superimposed. It will be displayed on the display screen 15 under the condition.

Since the present invention is configured as described above, the display screen 15 of the graphic display unit 14 has a display time axis (an even-numbered position on the x-axis coordinate) that is an even multiple of the unit time. The bar graph 16a corresponding to the measured input signal from one channel provided with the sensor a in the column direction (y-axis direction) of the dot position) is displayed on the display time axis (in x-axis coordinates) that is an odd multiple of the unit time. The bar graphs 16b corresponding to the input signals to be measured from the other channel provided with the sensor b in the column direction (y-axis direction) of the odd-numbered dot positions) can be alternately displayed with the dot patterns. .

Therefore, on the display screen 15 of the graphic display unit 14, the entire bar graph 16a displayed in an even multiple of the unit time is displayed as a unit of the waveform A'based on the measured input signal from one channel. The bar graph 16b, which is displayed as an odd multiple of the time, is simultaneously displayed as shown in FIG. 5 under the condition that the entire bar graph 16b is superimposed on each other as a waveform B ′ based on the measured input signal from the other channel. can do.

Therefore, even if the graphic display unit 14 has the monochromatic / grayscale display screen 15, the waveform A ′ and the waveform B ′ are displayed as if the display grayscales are different. It is possible to easily distinguish each other and display them at the same time.

[0021]

As described above, according to the present invention, for the graphic display section, the measured input signal from one of the channels is arranged in the column direction of the display time axis which is an even multiple of the unit time. It is possible to alternately display the bar graphs corresponding to the measured input signal from the other channel in the column direction of the display time axis which is an odd multiple of the unit time.

Therefore, the entire waveform based on the input signal to be measured from one channel is displayed as an odd multiple of the unit time in the entire bar graph displayed in the graphic display unit as an even multiple of the unit time. The entire bar graph displayed can display the entire waveform based on the measured input signal from the other channel while facilitating mutual discrimination.

[Brief description of drawings]

FIG. 1 is a block diagram showing an example of a device configuration to which the method of the present invention is applied.

FIG. 2 is a flow chart illustrating the outline of the processing procedure of the method of the present invention.

FIG. 3 is an explanatory diagram showing a waveform display process in relation to measurement data taken in from one channel in the method of the present invention.

FIG. 4 is an explanatory diagram showing a waveform display process in relation to measurement data taken from the other channel in the method of the present invention.

FIG. 5 is an explanatory diagram showing an example of a pattern when waveforms corresponding to input signals to be measured from two channels are displayed by the method of the present invention.

FIG. 6 is an explanatory diagram showing an example of a pattern when waveforms corresponding to input signals to be measured from two channels are displayed by a conventional method.

[Explanation of symbols]

 11a, 11a A / D converter 12 CPU 13 RAM 14 Graphic display unit 15 Display screen 16a, 16b Bar graph a, b Sensor

Claims (1)

[Claims] 1. An input signal to be measured from two appropriately selected channels is converted into corresponding digital measurement data, and a time-measured value progress graph is displayed in rows (x-axis) and columns (y).
In a multi-channel graphic display device that displays a bar graph composed of a dot pattern on the graphic display unit, the length of the display time axis in the row direction is a multiple of the unit time, and the display time is For the graphic display unit fixed to a predetermined time value,
The column direction of the display time axis that is an even multiple of the unit time is the display area of the bar graph based on the measured input signal from one channel, and the column direction of the display time axis that is an odd multiple is the measured direction from the other channel. A method for displaying measurement data on a graphic display unit, characterized in that display areas of bar graphs based on input signals are provided, and measurement data is alternately displayed as bar graphs in each of these display areas.