JP3057275B2 - Waveform display device - Google Patents

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 unit, and more particularly to an enlargement of the number of displayed waveforms.

[0002]

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

[0003]

However, when the waveform display system is constituted by an electronic circuit, there is a problem that the number of channels that can be simultaneously displayed is limited. For this reason, in a multi-channel input device, when observing the relationship between channels on the time axis, if the channels whose relationship is to be observed are not displayed simultaneously, specify the channel to be displayed again. It must be displayed again, and the operability is poor.

An object of the present invention is to solve such a problem. An object of the present invention is to display all the measurement channels simultaneously on the same screen so that the mutual relationship on the time axis of all the measurement channels can be observed. Another object of the present invention is to realize a waveform display device having excellent performance.

[0005]

SUMMARY OF THE INVENTION In order to solve such a problem, the present invention provides a memory for storing a plurality of m-channel waveform data and an arbitrary plurality of n (m> n) simultaneously displayed from the memory. ) A simultaneous display circuit for selecting waveform data of a channel, at least two channel setting circuits for setting channels to be simultaneously displayed on the simultaneous display circuit, and waveform data of the channels set by these channel setting circuits are commonly stored. Memory for waveform display,
A display unit for simultaneously displaying the waveform data stored in the memory.

[0006]

According to the present invention, waveform data of a plurality of channels set by a plurality of channel setting circuits are simultaneously displayed on a common display unit via a memory for displaying a waveform. Thereby, the waveforms of all the measurement channels can be simultaneously displayed on the common display unit, and the mutual relationship on the time axis of all the 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 one embodiment of the present invention.
In the figure, 1 is a memory for storing a plurality of m-channel waveform data, 2 is a simultaneous display circuit for selecting arbitrary n (m> n) -channel waveform data to be simultaneously displayed from the memory 1, and 3, 4 are respectively A channel setting circuit for setting channels to be simultaneously displayed on the simultaneous display circuit 2;
Reference numeral 5 denotes a graphic memory for displaying waveforms which commonly stores the waveform data of the channels set by the channel setting circuits 3 and 4. Reference numeral 6 denotes a display device such as a CRT which simultaneously displays the waveform data stored in the memory 5. is there.

[0008] The operation of the device thus configured will be described. For example, assume that the number of input channels is 16 and the number of channels that can be displayed simultaneously is 8 channels. In this case, two screens are required to display all channels. Therefore, in the present embodiment, two channel setting circuits for setting the display channel are provided so that two types of settings A and B can be simultaneously performed.
The display screen based on the condition B set by the channel setting circuit 4 is superimposed and displayed while the display is performed based on the condition A set in the above.

FIG. 2 is a display example based on the configuration of FIG. In the figure, (1) is a display example of four types of waveforms up to the condition A based on the condition A set by the channel setting circuit 3, and (2) is a display example of 4 waveforms based on the condition B set by the channel setting circuit 4. Display examples of different types of waveforms,
(3) is an example of display of eight types of waveforms from two screens in which condition A and condition 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 display settings such as the scale follow the condition B set by the channel setting circuit 4 displayed last, but the mutual relationship between the time axes of a plurality of waveforms based on the two types of settings is displayed on the screen of the common display device 6. It can be easily observed. Since the switching between the display screens (1) and (2) can be performed by a simple operation, there is no practical problem.

FIG. 3 is a flowchart showing the flow of such an 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). If only the analysis of the screen in (1) is sufficient, the entire operation is terminated when the analysis is completed. on the other hand,
If it is necessary to analyze the screen of (2) based on the condition B set by the channel setting circuit 4, the screen is changed to the screen of (2) (step) and the screen of (2) is displayed (step). The analysis on the screen of (2) is executed (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 analysis on the screen (1) is necessary again, the screen is changed to the screen (1) and the processing is repeated from the 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 for the first time, and the waveform may be plotted for the second time without plotting the frame. Also, a waveform partial enlarging function may be added as necessary. In this case, the same processing may be performed by making the magnifications 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.
At least two channel setting circuits capable of selecting n) may be used.

[0014]

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

[Brief description of the drawings]

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

FIG. 2 is a display example based on the configuration of FIG. 1;

FIG. 3 is a flowchart showing a flow of the operation of FIG. 1;

[Explanation of symbols]

 1 Waveform data memory 2 Simultaneous display circuit 3, 4 Channel setting circuit 5 Graphic display graphic memory 6 Display device

Claims (1)

(57) [Claims] 1. A memory for storing a plurality of m-channel waveform data, and an arbitrary plurality n (m> n) simultaneously displayed from the memory
A simultaneous display circuit for selecting channel waveform data; at least two channel setting circuits for setting channels to be simultaneously displayed on the simultaneous display circuit; and a waveform for commonly storing waveform data of channels set by these channel setting circuits. A waveform display device comprising: a display memory; and a display unit for simultaneously displaying waveform data stored in the memory.