JPS63108228A - Analog recording and displaying device for recorder - Google Patents

Abstract

PURPOSE:To perform smooth analog recording by providing a time base adjusting means which adjusts a time base according to the number of divisions obtained by dividing a part between recording points equally by interpolation recording points. CONSTITUTION:An A/D converter 12 is interposed in an input channel 10, so its digital data are processed as sampling data thereafter and an interpolation data generating means 32 divides the part between recording points formed with two adjacent digital input data along a time series equally by interpolation recording points, so interpolation data is generated based on those two digital input data. then the time base adjusting means 34 adjusts the paper feeding speed of recording paper where the time base is formed according to the number of the division between the recording points and an analog recording and display device 18 displays connects sequentially and displays recording points corresponding to the digital input data and interpolation data.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a recorder for recording voltage, current, and other input data, and particularly to a recorder for interpolating such input data to perform analog recording.

BACKGROUND OF THE INVENTION Conventionally, voltage, current, and other input data are recorded on recording paper using a recorder equipped with a graphic printer. At this time, analog input data is digitized by an A-D converter provided in the input channel, and points corresponding to the digital data are formed on recording paper to draw waveforms.

By displaying sampling data as points that faithfully correspond to them in this way, there is no misunderstanding and the density of recording points can be felt. Also, if the change in waveform is not sudden, it looks smooth. Moreover, the printing speed can also be increased to the maximum speed of the printer.

Problems to be Solved by the Invention However, if the waveform changes suddenly as shown in FIG. 7, the recording points will jump too far and be difficult to see, which will be inconvenient for observation and data reading.

Therefore, if the recording points are connected with straight lines, the result will be as shown in FIG. 8. Note that it is not possible to continuously connect recording points with an inclined straight line. As a result, large color differences occur between recording points, making it impossible to draw a smooth continuous waveform.

The present invention has been made by focusing on such conventional problems, and provides an analog recording and display device for a recorder that can perform smooth analog recording with small steps by improving the connections between recording points. The purpose is to

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 analog recording and display device for a recorder connects an A-D converter 12 provided in an input channel 10 for converting input data from analog data to digital data, and recording points formed based on those digital data. In order to equally divide the recording points formed by two adjacent digital input data along the time series with interpolated recording points, the two digital input data interpolation data creation means 32 that creates interpolation data based on;
It is provided with a time axis adjustment means 34 that adjusts the time axis in accordance with the number of divisions.

action The above means works as follows.

The A/D converter 12 is interposed in the input channel 10 to sequentially convert input data from analog data to digital data. These digital data are subsequently processed as sampling data. Since the interpolation data creation means 32 divides the recording points formed by two pieces of digital input data adjacent to each other along the time series into equal intervals by interpolation recording points, based on these two pieces of digital input data, Create interpolated data. The number of interpolated data can be selected as needed. The larger the number, the more it can respond to sudden changes in waveforms, resulting in smoother analog recording. The time axis adjusting means 34 adjusts the paper feeding speed of the recording paper forming the time axis in accordance with the number of divisions between recording points. The analog recording display 18 sequentially connects and displays recording points corresponding to digital input data and interpolated data.

Example Hereinafter, the present invention will be described in detail based on the accompanying drawings.

FIG. 2 is a block diagram showing an analog recording and display device for a memory recorder according to an embodiment of the present invention. In the figure, 10
12 is a channel for sending an analog input signal Si such as voltage, current, power, etc., and 12 is an A-D converter that is interposed in the channel 10 and converts input data from analog data to digital data. Further, 14 is an external memory for storing the digital data in chronological order, such as a RAM (
It is a readable and writable memo 'J). Note that the number of channels 10, A-D converters 12 provided therein, and external memories 14 can be increased as needed. 16 is an arithmetic unit that performs processing necessary for analog recording and display; 1B is an output signal S from the unit 16; This is an analog record display device that receives the information and displays the analog record on recording paper. This arithmetic unit 16 is, for example, a microcomputer, and includes a CPU (central processing bag @>20.RO
It is composed of M (read-only memory) 22, RAM 24, input port 26, output port 28, pass line 30, and the like. The CPU 20 corresponds to the central brain part of a microcomputer, and according to program instructions,
It performs overall control, performs arithmetic and logical operations, and temporarily stores the results. Additionally, it also controls surrounding devices and follows that control as well.

The ROM 22 stores a control program, an analog recording display processing program, etc. for improving the performance of the entire recorder. In addition, the ROM 24 is once stored in the external memory 14, and input data and CP data sent from there are stored in the external memory 14 once.
Stores data such as the calculation result of U20. The input port 26 is connected to the above-mentioned external memory 14 and other operation switches (not shown). Output port 28 also connects to analog record display 18 . The bus line 30 includes address bus lines, data bus lines, control path lines, etc. for connecting these, and is also coupled to peripheral devices. The analog recording/displaying device 18 is, for example, a graphic printer, which sequentially connects recording points corresponding to digital input data such as voltage and current and interpolated data created from these data while feeding a recording paper to generate analog waveforms, etc. It is to be displayed.

Next, the operation of this embodiment will be explained.

3 and 4 are flowcharts of an analog recording display processing program consisting of steps P1 to P15. To execute analog recording display, first select memory 1 by yourself.
The first digital input data DA stored in 4 is read and the corresponding recording point A is determined. Next, at P2, the next digital input data DE is read to determine the corresponding recording point E. Next, at P3, move between recording points A1E and 2
In order to divide it into equal parts, (A0E)/based on those two digital input data DA1DE adjacent in time series
Interpolated data D corresponding to 2. , and determine the interpolation recording point C. Next, in P4, record points A and C by 2
To divide equally, digital input data DA, interpolated data D
Based on C, an interpolation recording point B corresponding to (A10)/2 is determined. Next, at P5, record points C and E by 2.
In order to divide into equal parts, interpolation data Dc1 digital input data D
Based on E, an interpolation recording point D corresponding to (C1E)/2 is determined. In this way, the area between points A and E is divided into four equal parts by interpolated recording points C, B, and D. Note that the number of interpolated data can be appropriately selected and created as necessary. The larger the number, the more it can respond to sudden changes in waveforms, resulting in smoother analog recording.

Next, in P6, a straight line with a width of one line is drawn from recording point A to B on the recording paper. Next, in P7, the recording paper is fed by 1/4 line. Note that if you continue to feed such recording paper as before and feed one line for each recording point, the number of recording points will be four times as large, so the length of the feed will also be four times as many.
It will double in size. Therefore, in order to return the paper feed length to the original length, instead of feeding the paper one line at a time, it is sufficient to feed the paper one quarter line at a time. In this way, the paper feeding speed of the recording paper forming the time axis is adjusted according to the number of divisions between recording points. Next, in P8, a straight line is drawn from recording point B to C, and in P9, the recording paper is fed by 1/4 line. Also, Pl
At o, draw a straight line from recording point C to D, and at Pll, feed the recording paper by 1/4 line. Furthermore, in P12, a straight line is drawn from recording point D to E, and in P13, the recording paper is fed by 1/4 line. In this way, record point A
, B, C, D, and E are successively connected by parallel straight lines as shown in FIG. Note that FIG. 9 shows the case of conventional paper feeding. Next, replace the recorded point E with A on PI3 and view it. Next, in P15, the next digital input data is read and a corresponding new recording point E is determined. Now, by returning to P3 and repeating steps P3 to P15 a number of times corresponding to the required length of recording paper, an analog waveform record as shown in FIG. 6 is obtained.

According to the present invention, which has been described in detail, it is possible to obtain smooth analog recording with small steps.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an analog recording and display device for a recorder according to the present invention. FIG. 2 is a block diagram showing the same device according to one embodiment. 3 and 4 are flowcharts of the analog recording display processing program used in this embodiment. FIG. 5 is an explanatory diagram showing the process of performing analog recording according to this embodiment, and FIG. 6 is a diagram showing the printed analog recording. FIGS. 7 and 8 are diagrams showing analog recording by a conventional device. FIG. 9 is a diagram corresponding to FIG. 5 showing conventional recording paper feeding. 10...Input channel 12...A-D converter 1
4... External memory 16... Arithmetic device 18...
Analog recording display 20...CPU 22...
ROM24...RAM 32...Interpolation data creation means 34...Time axis adjustment means

Claims (1)

[Claims] An A-D converter that converts the input data provided in the input channel from analog data to digital data, and the recording points formed by two adjacent digital input data along the time series are interpolated recording points at equal intervals. interpolation data creation means for creating interpolation data based on the two digital input data,
An analog recording and display device for a recorder, comprising a time axis adjusting means for adjusting the time axis in accordance with the number of divisions, and an analog recording display unit for connecting and displaying the recording points.