JPH05133981A - Waveform display device - Google Patents

Abstract

PURPOSE:To provide a waveform display device which is excellent in operability and on which mutual relations among all measurement channels can be observed on a time base by simultaneously displaying all measurement channels on the same screen. CONSTITUTION:This waveform display device is provided with a memory 1 for storing the waveform data of a plurality of numbers (m) of channels, simultaneous display circuit 2 which selects a plurality of arbitray numbers (n) (M>n) of channels to be displayed simultaneously from the memory 1, and at least two channel setting circuits 3 and 4 which select the channels to be displayed simultaneously by means of the circuit 2. In addition, this display device is also provided with a memory 5 for displaying waveforms in which the waveform data of channels set by means of the circuit 3 and 4 are commonly stored and a displaying section 6 which simultaneously displays the waveform data stored in the memory 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waveform display device for displaying waveform data stored in a memory on a display section, and more particularly to increasing the number of displayed waveforms.

[0002]

2. Description of the Related Art As a waveform display device, the measured waveform is A / D
There is a configuration in which a converter converts it into a digital signal and stores it as waveform data in a memory, and then reads the stored waveform data and displays it on a display unit. By the way, in such a device, in order to speed up the waveform display, the waveform display system is configured by an electronic circuit.

[0003]

However, when the waveform display system is composed of an electronic circuit, there is a problem that the number of channels that can be displayed simultaneously is limited. Therefore, in a multi-channel input device, when observing the relationship between channels on the time axis, if the channels whose relationship you want to observe are not displayed at the same time, specify the channel you want to display again. It has to be displayed again and the operability is poor.

The present invention is intended to solve such a problem, and an object thereof is to display all measurement channels on the same screen at the same time so that the mutual relationship on the time axis of all the measurement channels can be observed. It is to realize a waveform display device having excellent properties.

[0005]

In order to solve such a problem, the present invention solves such a problem by storing a memory for storing waveform data of a plurality of m channels and an arbitrary plurality of n (m> n) displayed simultaneously from this memory. ) A simultaneous display circuit for selecting waveform data of channels, at least two channel setting circuits for setting channels to be simultaneously displayed by the simultaneous display circuit, and waveform data of channels set by these channel setting circuits are stored in common. Memory for waveform display,
And a display unit that simultaneously displays the waveform data stored in the memory.

[0006]

According to the present invention as described above, the waveform data of a plurality of channels set by the plurality of channel setting circuits are simultaneously displayed on the common display section via the waveform display memory. As a result, the waveforms of all measurement channels can be simultaneously displayed on the common display unit, and the mutual relationships on the time axis of all measurement channels can be observed.

[0007]

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.
In the figure, 1 is a memory for storing waveform data of a plurality of m channels, 2 is a simultaneous display circuit for selecting arbitrary plural n (m> n) channels of waveform data to be simultaneously displayed from the memory 1, 3 and 4 are respectively Channel setting circuit that sets the channels to be displayed simultaneously on the simultaneous display circuit 2,
Reference numeral 5 denotes a waveform display graphic memory for commonly storing the waveform data of the channels set by the channel setting circuits 3 and 4, and reference numeral 6 is a display device such as a CRT for simultaneously displaying the waveform data stored in the memory 5. is there.

The operation of the apparatus thus configured will be described. For example, the number of input channels is 16 and the number of channels that can be displayed simultaneously is 8. In this case, two screens are needed to display all channels. Therefore, in this embodiment, two channel setting circuits for setting display channels are provided so that two kinds of settings A and B can be performed at the same time.
The display screen based on the condition B set by the channel setting circuit 4 is overlaid and displayed while being displayed based on the condition A set in step 2.

FIG. 2 is a diagram showing a display example based on the configuration of FIG. In the figure, (1) is a display example of four types of waveforms based on the condition A set by the channel setting circuit 3, and (2) is a display example of four types based on the condition B set by the channel setting circuit 4. Display example of different waveforms,
(3) is a display example of eight types of waveforms for two screens in which these conditions A and B are superimposed.

In this case, the unit of the frame of the displayed waveform, the waveform to be analyzed, the cursor movement, the channel number of the waveform,
The setting contents of the display such as the scale follow the condition B set by the channel setting circuit 4 displayed last, but the mutual relation of the time axes of a plurality of waveforms based on the two kinds of settings is displayed on the screen of the common display device 6. It is easy to observe. Since switching between the display screens (1) and (2) can be performed by a simple operation, there is no practical problem.

FIG. 3 is a flow chart showing the flow of such operation. First, the waveform screen is erased (step). Next, the screen of (1) based on the condition A set by the channel setting circuit 3 is displayed (step).
Then, the analysis of the screen of (1) is executed (step). When only the analysis for the screen of (1) is sufficient, the entire operation is ended when the analysis is completed. on the other hand,
When analysis of the screen of (2) based on the condition B set by the channel setting circuit 4 is required, the screen of (2) is changed to (step) and the screen of (2) is displayed (step), Analyze the screen of (2) (step). If the analysis of the screen of (2) is sufficient, the entire operation is terminated when the analysis of the screen of (2) is completed. On the other hand, when the screen of (1) needs to be analyzed again, the screen is changed to the screen of (1) and is repeatedly executed from step (step).

In the above embodiment, a CR is used as the display device.
Although T is used, a recording device such as a plotter may be used. In this case, the waveform frame and the waveform may be plotted the first time, and the frame may not be plotted the second time, and only the waveform may be plotted. Further, a partial enlargement function of the waveform may be added if necessary. In this case, the same processing may be performed by making the enlargement factors of the time axis and the amplitude axis equal.

Further, in the above embodiment, an example in which four channels are selected by two channel setting circuits has been described, but when the whole is m channels, a maximum of n channels (m>
It suffices to use at least two channel setting circuits capable of selecting n).

[0014]

As described above, according to the present invention,
By displaying all the measurement channels on the same screen at the same time, a waveform display device with excellent operability that can observe the mutual relationship on the time axis of all the measurement channels can be realized, which is effective for various measurements.

[Brief description of drawings]

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

FIG. 2 is a display example diagram based on the configuration of FIG.

FIG. 3 is a flowchart showing a flow of operations in FIG.

[Explanation of symbols]

 1 waveform data memory 2 simultaneous display circuit 3, 4 channel setting circuit 5 waveform display graphic memory 6 display device

Claims (1)

[Claims] 1. A memory for storing waveform data of a plurality of m channels, and an arbitrary plurality of n (m> n) displayed simultaneously from the memory.
Simultaneous display circuit that selects the waveform data of channels, at least two channel setting circuits that set the channels to be displayed simultaneously by the simultaneous display circuit, and waveforms that store the waveform data of the channels set by these channel setting circuits in common A waveform display device comprising a display memory and a display unit for simultaneously displaying the waveform data stored in the memory.