JPH0516726B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a real-time waveform recorder with a monitor that displays voltage, current, and other input data in waveforms.

Conventional technology Conventionally, recording devices such as dot printers have been used to
Voltage, current, and other input data are recorded in waveforms on the recording paper. At that time, if a display device such as a CRT is provided, based on the same input data,
While displaying the waveform on the screen and printing the recorded waveform,
You can monitor it. Such monitor waveforms are displayed as A or B in FIG. Note that the solid line frame is one screen that displays the waveform, and the arrows indicate the process of changing the screen and the waveform displayed there. The former monitor waveform appears from the left end of the display screen and advances toward the right end. On each screen, the rightmost edge of the waveform is the latest input data, but when the waveform reaches the rightmost edge of the display screen,
Clear the entire screen once. Thereafter, the monitor waveform display operation is repeated in the same manner for the input data. Also, in the latter case, the monitor waveform appears from the left end of the display screen and moves toward the right end, but when it reaches the right end, the input data is sequentially updated from the left end and displayed, leaving part of the waveform intact. Repeat the monitor waveform display operation in the same way. As a result, transition points indicating the latest input data for any monitor waveform can be observed in real time.

Problems to be Solved by the Invention However, in both cases, while the waveform output from the recording device is continuous, the waveform on the display screen is interrupted and is not displayed continuously. Therefore, it is inconvenient to monitor the continuous waveform on the recording paper using the discontinuous waveform on the display screen.

The present invention has been made in view of these conventional problems, and it is an object of the present invention to provide a real-time waveform recorder with a monitor that can continuously display monitor waveforms.

Means for Solving the Problems Means for achieving the above object will be explained below using FIG. 1 which clearly shows the present invention.

This real-time waveform recorder with a monitor has an A-D converter 12 provided in an input channel 10 that converts input data from analog data to digital data.
and a display memory 16 that stores input data.
A display controller 18 sequentially reads one screen of input data including at least new input data from the display memory 16 and performs display control by scrolling the screen, and displays the input data on the screen under the control of the display controller 18. It is equipped with a display device 22 that continuously displays waveforms on a recording paper, and a recording device 20 that continuously records input data in waveforms on recording paper, and for these display device 22 and recording device 20,
An input data capturing means 44 is provided for sequentially capturing input data from the A-D converter 12 in chronological order for each recording section of the recording paper, that is, for each display section of one screen, and for the display device 22, Furthermore, the input data taken in for each display section area is stored in the display memory 16.
an input data writing means 46 for writing data into a predetermined storage partition area determined by a predetermined address of the input data transfer destination, the position of which corresponds to the input data, and a predetermined storage partition area of the display memory 16; Before new input data is written, all previously written input data is shifted and rewritten by one storage partition area, and the predetermined storage partition area determined by the input data transfer destination predetermined address is rewritten. An input data shift means 48 that enables writing is provided.

Effect The above means works as follows.

The input data capturing means 44 sequentially captures input data from the A-D converter 12 in time series for each recording section of the recording paper, that is, for each display section of one screen, and the input data writing section 46 inputs the input data in time series. The captured input data is written into a predetermined storage section area determined by a predetermined input data transfer destination address of the display memory 16, with its position corresponding to the input data. At that time, the input data shift means 48
Before new input data is written to a predetermined storage area of the display memory 16, all previously written input data is shuffled by one storage area and rewritten, and the input data is transferred to a predetermined input data destination. A predetermined storage partition area determined by an address is made writable. In that way,
Input data that has already been written to the display memory 16 is rewritten by shifting and new input data is written repeatedly in sequence. Therefore, the display controller 18 sequentially reads one screen of input data including at least new input data from the display memory 16, and performs display control by scrolling the screen. The display device 22 continuously displays such input data in a waveform on the screen under the control of the display controller 18. At this time, similar waveforms are continuously and simultaneously recorded on the recording paper of the recording device 20 based on the same input data.

Embodiments Hereinafter, embodiments of the present invention will be described based on the accompanying drawings.

FIG. 2 is a block diagram showing a real-time waveform recorder with a monitor according to an embodiment of the present invention. In the figure,
10 is an analog input signal S _i such as voltage, current, power, etc.
The transmission channel 12 is an A-D converter that is interposed in the channel 10 and converts input data from analog data to digital data. This A
-D converter 12 is, for example, an 8-bit converter. Note that if it is 8 bits, the input data taken in from the A/D converter 12 will have any value from 00 to FFH (indicated in hexadecimal notation). 14 is a device equipped with a CPU that performs processing necessary to record input data in continuous waveforms and display it on a screen. This device 14 has a display memory, such as a VRAM (Video RAM) 16, into which input data is written, and all new input data written to the display memory 16 and input data that has already been written are shifted and stored. A display controller that reads the corrected input data as appropriate and controls the display by scrolling (continuous movement) the screen, such as CRTC.
18 and a recording device for recording input data in print form, such as a dot printer 20, are connected respectively. Reference numeral 22 denotes a display device, such as a raster scan type CRT, which continuously displays input data in a waveform on a screen under the control of the display controller 18.
This display device 22 may be an LCD. mentioned above
The device 14 equipped with a CPU includes, for example, a CPU (central processing unit) 24, a ROM (read-only memory) 26,
A microcomputer consisting of a RAM (readable/writable memory) 28, an input/output port 30, a bus line 32, etc. is used. That CPU2
Reference numeral 4 corresponds to the central brain section of the microcomputer, which executes overall control according to program instructions, performs arithmetic and logical operations, and temporarily stores the results. It also controls peripheral devices. The ROM 26 stores a control program for improving the overall performance of the recorder, a processing program for recording and displaying input data in continuous waveforms on a screen, and the like. or,
The RAM 28 stores data such as the calculation results of the CPU 24, but also serves as a buffer memory that temporarily stores input data such as voltage and current. The input/output port 30 is connected to an A-D converter 12, an operation switch (not shown), a recording device 20, and the like.
The bus line 32 includes an address bus line, a data bus line, a control bus line, etc. for connecting these, and is also coupled to the display memory 16 and the display controller 18. Furthermore, if a dot matrix printer equipped with a line-type thermal recording head is used as the dot printer serving as the recording device 20 described above, the input data taken in from the A-D converter 12 can be converted according to the thermal head. After that, the waveform can be printed with dots as shown in FIG. However, 34 is a thermal head, 26 is a recording paper, 38 is a waveform, and the arrow is the moving direction of the recording paper 36. It should be noted that the thermal head 34 has a line along one line corresponding to the recording section area (one vertical dot line) of the recording paper 36.
There are dot positions from 1 to X (for example, number 280) that indicate the amount of input data.

Next, the operation of this embodiment will be explained.

FIGS. 4 and 5 are flowcharts consisting of steps P ₁ to P ₁₁ showing an example of a program for continuously displaying waveforms of input data. Figure 6 is
FIG. 2 is an explanatory diagram showing the correspondence between VRAM (indicated by a dotted line frame each address consisting of 8 bits) and a CRT screen (indicated by a solid line frame); To run this program, first set VRAM-ADR to Z and BIT to 0 at _P1 . These VRAM−
Both ADR and BIT are constants. That is, a predetermined address to which input data is to be transferred is set to Z, and 0 bit (the least significant bit) is selected from 8 bits within that address and fixed. Then, one column bit line consisting of a large number, for example, 256 0 bits, represented by the 0 bit in the address Z, is determined as the predetermined storage partition area. Next, at P ₂ , set SH-ADR to a,
Set TATE-ADR to 1. These SH−
ADR and TATE−ADR are both variables,
SH-ADR represents the representative address to be shifted in the VRAM 16, and TATE-ADR represents the shifted representative address and 256 addresses arranged vertically. Next, at P ₃ , whether SH−ADR is >Z or ≦
Determine whether it is Z. In the case of ≦Z, before writing new input data to the VRAM 16, all the input data already written there is rewritten by shifting by one memory partition area (one column bit line consisting of 256 unit bits), and The predetermined storage partition into which the new input data is to be written needs to be writable. However, in the case of >Z, new input data can be written, so the process goes to _P4 . In P ₄ , A-D
The input data is sampled from the converter 12 in chronological order, and the recording section (column 1 dot line) of the recording paper, that is, the display section area of 1 screen (column 1
The input data corresponding to the dot line is taken into the buffer memory (RAM) 16. Therefore, the input data is converted and transferred to the dot matrix printer 20 for its thermal head 34, and a waveform is printed using dots. Then in P ₅ ,
The input data stored in the buffer memory 16 is converted to match the display format of the CRT 22, and the VRAM is
The input data is transferred to the VRAM 16 and written to the position corresponding to the input data of the bit (column 1 bit line consisting of 0 bits) corresponding to a predetermined storage partition area determined by the input data transfer destination predetermined address Z of the VRAM 16. Note that the conversion compatible with the display format of CRT22 is dot matrix.
The data conversion for the thermal head 34 of the printer 20 is similar. CRTC18 is VRAM16
Reads the new input data written in and controls the display by scrolling the screen.
Display a dot on the CRT22 screen (7th
Figure A). Next, to display new input data, the dot must be shifted one line to the left and rewritten. Therefore, when P ₃ is determined after passing through P ₂ , it is determined that .ltoreq.Z. Then at P ₆ ,
Determine whether TATE−ADR is <256 or ≦256. ≦
If it is 256, go to P ₇ . At _P7 , the data stored in the address corresponding to TATE-ADR in the SH-ADR column is shifted one dot to the left and rewritten. At that time, all bits are shifted one dot to the left from the most significant bit to the least significant bit, but in this case, the most significant bit is shifted to the left by one dot.
This processing is necessary because it will be shifted to TATE-ADR of the SH-ADR column. So in P ₈ ,
It is determined whether the most significant BIT of the data at the address corresponding to TATE-ADR on the right of SH-ADR is "1". Note that a bit of "1" indicates that the input data has been converted and written as corresponding one-dot data. If YES then P ₉
Go to and set the lowest BIT of the data at the address corresponding to TATE-ADR in the SH-ADR column to "1". If NO, go to _P10 , add 1 to TATE-ADR, determine the next TATE-ADR to be processed, and return to _P6 . In this way, the same SH−
P ₆ ~ TATE−ADR data corresponding to the ADR column
By repeating step P ₁₀ , TATE-
From ADR1 to 256, shift one dot line to the left and rewrite. Then, at P ₆ , it is determined that 256<, so go to P ₁₁ . At _P11 , SH-ADR is set to the address on the right, its TATE-ADR is set to 1, and the process returns to _P3 . In this way, SH− at P ₃
The predetermined steps are repeated until ADR is determined to be >Z. Therefore, the CRTC 18 shifts all the input data that has already been written, reads the rewritten input data, and displays dots on the screen of the CRT 22 by controlling the display by scrolling the screen (FIG. 7B). Then, in the VRAM 22, one bit line in the rightmost column becomes writable. So, sample the following input data and
Steps P ₄ and P ₅ are taken, and data is written to the corresponding position of the 1 bit line, read out together with the input data that has been written up to that point, and displayed as a dot on the screen (Figure 7C). After all of the input data is rewritten by shifting through predetermined steps, it is displayed as dots on the screen again (FIG. 7D).
In this way, the VRAM 16 is repeatedly rewritten by shifting all of the input data already written in the VRAM 16 by one dot line to the left, and writing new input data to the rightmost one dot line.
Every time new input data is written to the CRT 22 or every time rewriting by shift is completed, the CRTC 18 reads all the input data for one screen from there, and when the display is controlled by scrolling the screen, the input data is displayed on the CRT 22 screen. The waveform is successively displayed with dots corresponding to (Fig. 7E).
FIG. 7 shows the input data input up to this point displayed in correspondence with dots on the recording paper and on the screen for each process. In Figure A, 40 and 42 are corresponding dots on the recording paper and the screen, and the arrows indicate the subsequent transitions of the dots in each process. When the above-described processing of input data is repeated, the waveform scrolls (moves continuously) from right to left on the screen and is displayed continuously without interruption. Note that the direction of scrolling is arbitrary; when input data is displayed from the left end of the screen, the waveform is scrolled from left to right by shifting one dot line to the right.

Effects of the Invention According to the present invention described above, the waveform monitored by the real-time waveform recorder can be continuously displayed on the screen.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a real-time waveform recorder with monitor according to the present invention. FIG. 2 is a block diagram showing a real-time waveform recorder with monitor according to an embodiment of the present invention. FIG. 3 is an explanatory diagram of a state in which recording is performed using an input waveform in the recording apparatus employed in the same embodiment. FIGS. 4 and 5 are flowcharts of a continuous waveform display processing program for input data employed in the same embodiment. FIG. 6 is an explanatory diagram showing the correspondence between the VRAM and the CRT screen employed in the same embodiment. FIG. 7 is an explanatory diagram in which input data in the same embodiment is displayed in correspondence with dots on recording paper and on a screen. FIG. 8 is an explanatory diagram showing a conventional monitor waveform. 10...Input channel, 12...A-D converter,
14... Device equipped with a CPU, 16... Display memory,
18...Display controller, 20...Recording device, 2
2...Display device, 44...Input data importing means, 46
...Input data writing means, 48...Input data shifting means.

Claims (1)

[Claims] 1 An A-D converter that converts the input data provided in the input channel from analog data to digital data, and an A-D converter that converts the input data from analog data to digital data, and displays the input data from the A-D converter in chronological order on the recording section of the recording paper, that is, on one screen. an input data importing means for sequentially importing input data for each segmented area; a display memory for storing input data; and a display memory for storing input data for each display segmented area at a predetermined address determined by a predetermined input data transfer destination address of the display memory. An input data writing means writes data into a storage partitioned area in a manner corresponding to the input data; input data shifting means that shifts and rewrites each input data by one storage area and enables writing in a predetermined storage area determined by a predetermined input data transfer destination address; A display controller that sequentially reads one screen of input data including input data and controls the display by scrolling the screen, and a display that continuously displays input data in waveforms on the screen under the control of the display controller. 1. A real-time waveform recorder with a monitor, comprising a recording device and a recording device that continuously records input data in waveforms on recording paper.