JPH0546156A - Real-time x-y display device - Google Patents

Abstract

PURPOSE:To clearly identify the time relation of a display image by displaying image data, written in plural image memories, on a display part one over another. CONSTITUTION:This display device is provided with (n) image memories 7 in parallel. In this constitution, drawing processor 6 converts X-Y data which is inputted from a control processor 3 into X-Y display image data and controls the clearing and writing of the X-Y display image data on the respective image memories 71-7n in a period (e.g. about 2 seconds) wherein an elapsed time can be observed from a display image. The image data written in the respective image memories 71-7n are displayed on the CRT display part 8 one over another. Consequently, image data are erased in order the specific time later to update the display, so the display waveform is updated and displayed with the time. The display part 8 in not limited to a CRT and a planer display unit such as EL and liquid crystal is usable.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a real-time XY display device, and more particularly, to identification of a time relationship of a displayed waveform.

[0002]

2. Description of the Related Art FIG. 4 is a block diagram showing an example of a conventional real-time XY display device. In the figure, 1 is X
-Y measuring unit, which simultaneously converts an X-axis input and a Y-axis input into a digital signal to generate XY data. This XY
The data is input to the control processor 3 via the I / O interface 2. The control processor 3 has a ROM 4 for storing fixed data and an R for storing variable data.
AM5 is connected. 6 is a drawing processor,
XY data input from the control processor 3 is transferred to XY
It is converted into display image data and sequentially stored in the image memory (VRAM) 7. Reference numeral 8 denotes a CRT display unit, which is an image memory 7
The XY display image data stored in is displayed under the control of the operation unit 9.

In such a configuration, the image memory 7 has a storage capacity corresponding to at least the display resolution (for example, 200 × 200 dots) of the effective display area of the CRT display section 8. Then, the drawing processor 6 controls to successively store all the XY display image data from the start to the end of the observation in the image memory 7.

[0004]

However, according to such a method, when the observation time is long or the change of the XY display image data is small, it is stored in the image memory 7. The display patterns that are
It is difficult to understand the time relationship from the XY display waveform of the T display unit 8.

The present invention solves such a conventional problem, and an object thereof is to realize a real-time XY display device capable of easily grasping a time relationship from a display waveform.

[0006]

The present invention is based on an X-axis input and a Y-axis input.
An XY measuring unit for simultaneously converting the shaft inputs into digital signals to generate XY data, a plurality of image memories for storing XY display image data, and the XY data. X-Y
The display image data is converted into XY display image data for each image memory at a cycle in which the elapsed time can be observed from the display image.
A drawing processor that controls the clearing and writing of data,
And a display unit for displaying the XY display image data stored in each of the image memories in an overlapping manner.

[0007]

The XY display image data is cleared and written in the plurality of image memories at a cycle in which the lapse of time can be observed from the display images, and the image data written in the plurality of image memories is written. -The data is displayed overlaid on the display. As a result, the display image on the display unit is sequentially cleared and updated and displayed from the oldest portion, so that the time relationship of the display image can be clearly identified.

[0008]

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.
The same parts as those in FIG. 4 are designated by the same reference numerals. The difference between FIG. 1 and FIG. 4 is that a plurality of image memories 7 similar to FIG.
The point is that they are provided in parallel.

In such a configuration, the drawing processor
6 represents the XY data input from the control processor 3.
Converted to XY display image data and memoized each image
Re 7 ₁~ 7_nCan be observed from the displayed image over time
Of the XY display image data at regular intervals (for example, about 2 seconds)
Control rear and write. Then, each of these image
Mori 7₁~ 7_nThe image data written in is displayed on the CRT.
It is displayed in an overlapping manner on the section 8.

FIG. 2 is a conceptual explanatory view of such an operation. In FIG. 2, continuous XY display image data is written in each of the image memories 7 _{1 to} 7 _n after being divided, for example, in a cycle of 2 seconds and sequentially cleared. Here, the image data in each of the image memories 7 _{1 to} 7 _n is cleared and updated every 2n seconds. On the other hand, since the image data written in each of the image memories 7 _{1 to} 7 _n is always displayed on the CRT display section 8 in an overlapping manner, the latest part of the image data is dynamically displayed. become.

FIG. 3 is a flowchart showing the flow of the operation of FIG. Immediately after the measurement start command is issued from the operation unit 9, all the image data in the image memories 7 _{1 to} 7 _n are cleared, and the image data for each designated time (for example, 2
Second) waveform image data is sequentially created and stored (step). After storing the image data up to the final image memory 7 _n , the process returns to the _first image memory 7 ₁ (step), and the image data stored in the image memory 7 ₁ at that time is cleared (step). Thereafter, the image de stored in the image memory 7 ₁ - stores created a new data (step). This procedure is applied to the final image memory 7 _n
Repeat until (step,). Final image memory 7 _n
Returns to the image memory ₇₁ of the head again after the repeated steps - from the operation unit 9 to the measurement end instruction is output.

With this configuration, the image data of the portion where the predetermined time has elapsed is sequentially erased and updated, so that the display waveform is updated and displayed as the time elapses.
Therefore, unlike the prior art, a series of waveforms from the start of measurement to the present time are not overlapped and displayed in multiple, and the latest portion of the displayed waveform can be clearly discriminated and observed.

The display unit 8 is not limited to the CRT, but may be a flat display such as EL or liquid crystal.

[0014]

As described above, according to the present invention,
It is possible to realize a real-time XY display device that can easily grasp the time relationship from the displayed waveform.

[Brief description of drawings]

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

FIG. 2 is a conceptual explanatory diagram of the operation of FIG.

FIG. 3 is a flowchart showing the operation flow of FIG.

FIG. 4 is a block diagram showing an example of a conventional device.

[Explanation of symbols]

 1 XY measuring unit 2 I / O interface 3 Control processor 4 ROM 5 RAM 6 Drawing processor 7 Image memory (VRAM) 8 Display unit (CRT) 9 Operation unit

Claims (1)

[Claims] 1. An XY measuring unit for simultaneously converting an X-axis input and a Y-axis input into digital signals to generate XY data, and a plurality of XY display image data storing units. An image memory and the XY data are converted into XY display image data, and the XY display image data is converted into a XY display image data for each image memory at a cycle that can be observed from the display image. Real-time XY display comprising a drawing processor for controlling clearing and writing, and a display section for displaying the XY display image data stored in each of the image memories in an overlapping manner. apparatus.