JP3089738B2 - Waveform analyzer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a signal recording apparatus, and more particularly to display control of an electric signal output in connection with a mechanical operation and a video signal of the mechanical operation.

[0002]

2. Description of the Related Art For example, when developing or adjusting a mechatronics device such as a robot, a control signal of an internal servo system is sampled as an electric signal, stored in a memory as waveform data, and synchronized with the sampling of the electric signal. The movement of the device is photographed by a video camera or the like and recorded as a video signal. If necessary, the waveform data and the video signal can be reproduced and displayed in synchronization with each other. The relationship can be visually grasped, and a significant improvement in work efficiency can be expected.

[0003]

However, for example, in a conventional oscilloscope, even if a time of a noticed portion such as a unique change point on a waveform of an electric signal displayed on a screen is designated, an image corresponding to the time is designated. Cannot be reproduced and displayed immediately. It is also difficult to display a waveform at a certain time on an oscilloscope by designating a video at a certain time. The present invention focuses on such a conventional problem, and its object is to set an arbitrary time on one display screen between the electric signal waveform display screen and the video signal display screen and to set the other time. Is to realize a signal recording device in which the display screen is reproduced and displayed corresponding to the time.

[0004]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides an electric signal output in connection with a mechanical operation.
Sampled and stored in the waveform memory as waveform data.
Read the waveform data stored in the waveform memory
A first display system for reproducing and displaying the waveform by its mechanical
Video operations into the video memory as video signals.
Read the video signal captured by the memory and display the video
The second display system to be shown and the display screen of each of these display systems
Time setting input means for specifying an arbitrary time on the
Others according to the time information specified on the display screen of the display system
Control to display and display the display screen of the other display system
And a microprocessor.
You.

[0005]

The data at each time of the electric signal fetched into the waveform memory and the data at each time (data for one screen) of the video signal fetched into the video memory are managed by the address of each memory. Thus, by setting an arbitrary time, each data synchronized with the set time can be read from the waveform memory and the video memory based on each address, and the recorded waveform and the video can be simultaneously reproduced and displayed in synchronization.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. FIG. 1 is a basic configuration diagram of the present invention. In the figure,
Reference numeral 1 denotes an analog / digital converter (hereinafter, referred to as an A / D converter), which performs analog / digital conversion of an electric signal input from a terminal Ain. Here, the electric signal means a control signal inside the apparatus to be measured or a signal converted and output as an electric signal from a sensor or the like attached to the apparatus main body. A waveform memory 2 stores waveform data converted and output from the A / D converter 1. Reference numeral 3 denotes an internal trigger circuit that compares an electric signal input from the terminal Ain with a predetermined set value, and displays waveform data on a screen when a voltage value of the electric signal satisfies a condition set by the set value. Is output as a trigger signal to be displayed. A waveform memory control circuit 4 outputs an operation timing control signal to the waveform memory 2 based on a trigger signal input from the internal trigger circuit 3 and a signal input from the microprocessor circuit 13. Reference numeral 5 denotes a waveform display circuit which receives waveform data from the waveform memory 2 and a microprocessor circuit 13
A control signal is input from the controller to generate a display signal for displaying a waveform. It is assumed that the waveform display circuit 5 includes a display frame buffer and the like. A waveform display monitor 6 displays a waveform based on a waveform display signal input from a waveform display circuit. 7 is a video input unit,
A / D conversion is performed on the video signal input to the terminal Pin. Here, the video signal is NTSC (national telev
video signal or CC such as ision system committee)
It means an image detection signal by an image element such as D (charge coupled device). Reference numeral 8 denotes a video memory, and a video input unit 7
The video signal data output from is stored. This video memory may be an IC chip or the like. Reference numeral 9 denotes a video trigger circuit, which outputs a trigger signal when video signal data matches a preset pattern. A video memory control circuit 10 outputs an operation timing control signal to the video memory 8 based on a trigger signal input from the video trigger circuit 9 and a signal input from the microprocessor circuit 13. An image display circuit 11 generates a display signal for image display based on image signal data input from the image memory 8 and a signal input from the microprocessor circuit 13. An image display monitor 12 displays an image based on an image display signal input from the image display circuit 11. The microprocessor circuit 13 performs a series of controls associated with waveform display and video display based on a time setting signal input from the time setting input unit 14 for setting a display time.

The operation of such a configuration will be described. First, a case where the display is reproduced and displayed when triggered by an electric signal will be described. The electric signal input to the terminal Ain is A / D
The data is converted into a digital value by the converter 1 and stored in the waveform memory 2 as waveform data while being controlled by the memory control circuit 4. At the same time, the video signal is also converted into a digital value by the video input unit 7, and is sequentially stored in the video memory 8 for each frame, that is, for each data of one screen. The video memory control circuit 10 operates based on a timing signal of an operation related to the waveform memory control circuit 4 given from the microprocessor circuit 13. The waveform data of the electric signal stored in the waveform memory 2 and the video signal data of the video signal stored in the video memory 8 are reproduced and displayed at a speed or a time axis specified by the microprocessor circuit 13. However, since the sampling speed of an electric signal is much higher than the shutter speed for an image, a large amount of data obtained by sampling the electric signal for one screen monitored by an image exists. This is due to mechanical or optical problems of the shutter.

Here, an electric signal is expressed by V = f (t), and a video signal is expressed by I = g (x, y, t). FIG. 2 is a display example of an electric signal displayed on the waveform display monitor 6,
This is a representation of a period from time t1 to time t2 on the xy plane. FIG. 3 is a display example of a video signal displayed on the video display monitor 12. Since the video signal includes three-dimensional or four-dimensional information including the time axis, what is displayed on the same screen in time series on the video display monitor 12 is frame-captured for each frame, that is, for each data of one screen. It is a screen in which video screens are arranged in order from left to right and from top to bottom. That is, a screen based on the video signal I1 at the time t1 is displayed at the upper left end in FIG. 3, and a screen of the video signal I2 at the time t2 is displayed on the right side thereof.

Here, for example, in the waveform display example of the electric signal shown in FIG. 4, it is assumed that a screen of the video signal Ii at the time ti is to be displayed. For this purpose, first, the time ti is set on the waveform data displayed on the waveform display monitor 6 by the time setting input means 14 using a cursor or the like. When the selection of the data at time ti is input to the waveform display circuit 5, information as to which address of the frame buffer in the waveform display circuit 5 (not shown) stores the data of the video signal Ii at time ti. It is extracted and sent to the microprocessor circuit 13. Microprocessor circuit 13
Outputs to the video display circuit 11 a setting signal indicating which frame (in this example, the screen based on Ii) is to be selected based on the address information of the frame buffer. As a result, the waveform display monitor 6 shown in FIGS.
When the time t on the waveform data of the electric signal is set as shown in FIG.
As shown in (b ′) and (c ′), the video signal I for each of the settings (a), (b) and (c) is displayed. Since FIGS. 5A to 5C are displayed for each screen and the display of FIG. 3 is enlarged, there is an advantage that it is easier to see than the display form of FIG.

Next, the video signal Ii displayed in FIG.
Will be described when the time ti is displayed on the waveform data by designating. By selecting a desired video signal from the plurality of video signals I1 to Ii + 1 displayed in FIG. 3, the address information of the storage location of the video signal frame is transmitted from the video display circuit 11 to the microprocessor circuit 1.
3 is output. The microprocessor circuit 13 outputs information for selecting an address of a frame buffer (not shown) in the waveform display circuit 5, and places a pointing device corresponding to a marker or a cursor at a corresponding position on the waveform displayed in FIG. Display. Note that it is also possible to sequentially select a plurality of video signal screens by frame advance and to display a marker or the like at a corresponding time on the electric signal displayed on the waveform display monitor 6. Although two monitors are provided in FIG. 1, this is not essential, and the waveform and the video may be displayed on one monitor.

Here, the difference in the time axis resolution between the electric signal and the video signal will be described. As described above, since the sampling speed of an electric signal is much higher than the shutter speed for an image, a large amount of data obtained by sampling the electric signal for one screen monitored by an image exists. That is, in the case as shown in FIG. 5, there are always many data of the electric signal V = f (t) or the video signal I = g (x, y, t) on the screen of the video signal Ii at the time ti. At this time, the operation is performed in accordance with the lower one of the time axis resolutions.

[0012]

As described above, according to the present invention,
By setting an arbitrary time on the waveform data of the electrical signal displayed on the screen of the waveform display monitor, the video recorded simultaneously with that signal can be played back and displayed on the screen of the video display monitor, or the video display It is possible to select an image displayed on the monitor screen and reproduce and display the electric signal at that time as a waveform on the waveform display monitor screen. Since the relationship between the mechanical operation and the electric signal can be visually grasped in this way, it is particularly effective as a measurement and analysis device in the mechatronics technology field where the electric field and the mechanical field are fully integrated.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of the present invention.

FIG. 2 is a diagram showing an embodiment of a screen display according to the present invention.

FIG. 3 is a diagram showing an embodiment of a screen display according to the present invention.

FIG. 4 is a diagram showing an embodiment of a screen display according to the present invention.

FIG. 5 is a diagram showing an embodiment of a screen display according to the present invention.

[Explanation of symbols]

 Reference Signs List 1 A / D converter 2 Waveform memory 3 Internal trigger circuit 4 Waveform memory control circuit 5 Waveform display circuit 6 Waveform display monitor 7 Video input section 8 Video memory 9 Video trigger circuit 10 Video memory control circuit 11 Video display circuit 12 Video display monitor 13 Microprocessor circuit 14 Time setting input means

Claims (1)

(57) [Claims] An electric signal output in connection with a mechanical operation.
Sampled and stored in the waveform memory as waveform data.
Read the waveform data stored in the waveform memory
The first display system, which reproduces and displays waveforms, and captures the mechanical operation of the first display system into the video memory as video signals
Read the video signal stored in the video memory
The second display system that reproduces and displays the image, and an arbitrary time is specified on the display screen of each of these display systems
The time setting input means and the time information specified on the display screen of one of the display systems correspond to the time information.
Control to play back the display screen of the other display system.
And a microprocessor for controlling the signal recording device.