JPH02128163A - Waveform display apparatus - Google Patents

Abstract

PURPOSE:To visually grasp the timewise relation between mutual display waveforms from a display picture by displaying one frame with higher brightness as compared with other frame in the display of a waveform and changing over the same according to timewise relation. CONSTITUTION:An A/D converter 1 is started according to the condition set by a setting part 4 by a microprocessor 7 and output data obtained by the conversion of an analogue input signal is successively stored in a data memory 2 at every frame according to the condition. A display control apparatus 10 reads said data on a display part 3 in a frame unit according to the condition. At this time, the waveform data of a frame displayed with high brightness and the waveform data of all of frames are respectively stored in the first and second brightness display processing blocks 11, 12 and simultaneously displayed on a CRT 13 as a graphic picture. Herein, brightness modulation is applied to the data from the block 11 and the data of the block 11 is displayed with higher brightness as compared with that of the block 12. Thereafter, a rotary encoder 5 is rotated and a high brightness display frame can be arbitrarily changed over.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a waveform display device that reproduces and displays multiple frames of waveform data stored in a data memory, and specifically relates to an improvement in display form. It is.

<Prior art> For example, in a digital oscilloscope, after converting the analog input signal A in to a digital signal in the A/D converter 1 as shown in FIG. The waveform storage unit 2 stores n frames of waveform data as one frame of waveform data, and displays the waveform data stored in the waveform storage unit 2 on a display unit 3 including a display such as a CRT. There is.

By the way, when displaying waveforms in such a conventional waveform display device, a plurality of frames are overlapped and displayed at the same brightness as shown in FIG. It was done to display only the frame.

<Problems to be Solved by the Invention> However, according to the former method, multiple waveforms are displayed overlappingly with the same brightness, so it is difficult to identify a specific waveform or the time relationship between multiple waveforms from the display screen. That is difficult.

Furthermore, although the latter method eliminates the clutter of the display screen, it is difficult to grasp the relationship between temporal changes in the displayed waveform.

The present invention has focused on these points, and its purpose is to provide a waveform display device that allows the time relationship between displayed waveforms to be visually grasped from the display screen.

Means for Solving the Problems> The waveform display device of the present invention is a waveform display device that reproduces and displays a plurality of frames of waveform data stored in a data memory. a first frame for reproducing and displaying the selected at least one frame at a first brightness;
a display processing block for selecting at least one frame from a plurality of frames of waveform data stored in the data memory and simultaneously reproducing and displaying the selected frame on the same display at a second brightness lower than the first brightness; A display processing block is provided.

Effect> In the waveform display according to the present invention, at least one frame out of a plurality of frames displayed simultaneously is displayed with higher brightness than the other frames, and the frames to be displayed with high brightness are switched according to the time relationship. This makes it possible to visually grasp the relationship of temporal changes between multiple waveforms.

<Example> Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a configuration explanatory diagram without showing an embodiment of the present invention, and in FIG. 0, the same parts as in FIG. This is an operation section for setting the settings on the microprocessor 7, and is provided with a rotary encoder 5 and a keyboard 6. A microprocessor 7 controls the operation of the entire device. The microprocessor 7 determines the frame length of the data memory 2, the area for storing the output data of the A/D converter 1,
The number of frame divisions is also controlled. Note that a measurement end signal is applied to the microprocessor 7 from the A/D converter 1. 8 is a random access memory used as a system memory, and 9 is a read-only memory in which a control program is stored. 10 is a display control device which reads out waveform data from the data memory 2 under the control of the microprocessor 7 and inputs it to the display section 3, and selectively modulates the brightness on a frame-by-frame basis. a first display processing block 11 that reproduces and displays at least one frame selected from a plurality of frames of waveform data stored in the memory at a first brightness; and a data memory 2.
a second brightness display processing block 12 that selects at least one frame from a plurality of frames of waveform data stored in the CR'l and simultaneously reproduces and displays it on the same display at a second brightness lower than the first brightness; It consists of '13.

Each display processing block 11.12 is provided with a respective graphics random access memory.

The operation of the device configured in this way will be explained.

First, by operating the rotary encoder 5 and keyboard 6 of the setting section 4, the measurement conditions, the number of frame divisions of the data memory 2, the frame length, the frame number to be displayed with high brightness, etc. are input into the microprocessor 7.

The microprocessor 7 performs A/A according to the set conditions.
Start up D converter 1.

Waveform data D output from the A/D converter 1 is sequentially stored in the data memory 2 for each frame according to set conditions. After outputting a predetermined number of frames of data, the A/D converter 1 outputs a measurement end signal S to the microprocessor 7.

The microprocessor 7 identifies the measurement end signal S input from the A/D converter 1, thereby controlling the display control device 1.
0 to set various conditions for waveform display.

The display control device 10 reads out the waveform data D stored in the data memory 2 to the display section 3 in units of frames according to set conditions. At this time, the waveform data of the frame to be displayed at high brightness is transferred to the first brightness display processing block 11 and stored in the random access memory of that block, and the waveform data of all frames is transferred to the second FF display processing block 12. and stores it in random access memory for that block. And each of these blocks 11°12
The waveform data of each frame transferred and stored in is simultaneously displayed as a graphic screen on a common display device CR'r13. Here, the first brightness display processing block 11
Since the waveform data of the frame transferred and stored in is subjected to brightness modulation,
The waveform data of the frame transferred and stored in No. 2 will be displayed with higher brightness than the waveform data of the frame transferred and stored.

FIG. 2 is an explanatory diagram showing the flow of such display operation processing, in which the waveform data of the second frame stored in the data memory 2 is displayed with high brightness, and the waveform data of other frames are displayed with low brightness. An example is shown.

After the display state as shown in FIG. 2 is set, the frame to be displayed with high brightness can be arbitrarily switched by rotating the rotary encoder 5 as shown in FIG. That is, the microprocessor 7 controls the waveform data of the corresponding frame from the data memory 2 to be transferred and stored in the first brightness display processing block 11 in accordance with the designation from the rotary encoder 5. Such switching of high-intensity display frames can be performed sequentially along the forward and backward directions of the time axis.

FIG. 3 shows an example in which eight frames of waveform data are measured and displayed, and (a) shows an example in which the second frame is designated as the high-brightness display frame.

Note that a part of the CRT 13 is provided with an area where frame numbers to be displayed with high brightness are displayed as a menu. By rotating the rotary encoder 5 to the right from the state of (a), the frame number to be displayed with high brightness changes from "2" to "3", and as shown in (b), the CR
The waveform of the third frame on the display screen 'r13 will be displayed with high brightness. By continuing to rotate the rotary encoder 5 in the right direction from the state of (b), the frame number to be displayed with high brightness changes to "8", and as shown in (c), the 8th frame number on both display surfaces of the CRT 13 changes to "8". The frame waveform will be displayed with high brightness. Note that by rotating the rotary encoder 5 to the left from state (c), the frame number to be displayed in high brightness changes from "8" to "1", and the waveform of the frame to be displayed in high brightness also changes. It will be sequentially switched toward the first frame.

According to such a display form, frames of interest can be selectively displayed with high brightness, so it is possible to improve the clutter of the display screen caused by the conventional display of multiple waveforms with the same brightness, and A specific waveform or the time relationship between multiple waveforms can be easily grasped from the display screen. Furthermore, by rotating the rotary encoder 5, the frame displayed in high brightness changes instantaneously, so multiple previously captured waveforms can be played back and displayed like a video, which is also effective for observing waveform behavior. be.

In addition, in the above embodiment, an example was shown in which the contents of the data memory 2 are read out to the display section 3 via the display control device 10.
The microprocessor 7 may directly read the contents of the data memory 2 and transfer and store them on the display section 3.

Further, the means for changing the designation of the high-brightness display frame is not limited to the rotary encoder, and may be changed using a keyboard or external communication data.

In addition to displaying all the waveform data stored in the data memory 2 on the display 3 and displaying only one frame with high brightness, it is also possible to selectively display arbitrary multiple waveform data and further display them. One or more frames may be displayed with high brightness and changed one after another.

Alternatively, a series of display operations may be performed after capturing a set number of frames of waveform data in one startup operation, or a predetermined number of frames of waveform data may be captured while repeating measurement 1 display for each frame. After that, a plurality of waveforms may be displayed simultaneously, and a specific waveform may be selectively displayed with high brightness.

<Effects of the Invention> As described above, according to the present invention, it is possible to realize a waveform display device in which the time relationship between displayed waveforms can be visually grasped from the display screen, which has great practical effects.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of the configuration showing an embodiment of the present invention, FIGS. 2 and 3 are explanatory diagrams of the operation of FIG. 1, FIG. 4 is an explanatory diagram of the configuration of an example of a conventional device, and FIG. Figures and Figure 6 are
It is an explanatory diagram of the operation of the figure. 1...A/D converter, 2...data memory, 3...
-Display unit, 11...first brightness display processing block, 12
. . . 2nd ff degree display processing block, 13 . . . Display device. Funeral Map CI” JT Graph Ink Facing Diagram

Claims (1)

Scope of Claims: A waveform display device that reproduces and displays a plurality of frames of waveform data stored in a data memory, in which at least one frame selected from the plurality of frames of waveform data stored in the data memory is displayed at a first luminance. The first to be played and displayed
a display processing block for selecting at least one frame from a plurality of frames of waveform data stored in the data memory and simultaneously reproducing and displaying the selected frame on the same display at a second brightness lower than the first brightness; A waveform display device comprising a display processing block.