JPH0213724B2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a pen recorder.

As is well known, a pen recorder drives a pen in accordance with an input signal (analog amount) and records on a recording paper that is transported by the pen. Therefore, the content recorded on the recording paper becomes the input signal waveform with respect to time. However, when it is necessary to read the input signal waveform after or during recording, the graduations on the recording paper are used as a scale, or another scale is used. It is difficult to read because of the Furthermore, when using another scale, if the relative positional relationship of that scale with respect to the recording paper is shifted, it may cause erroneous reading.

An object of the present invention is to easily and reliably read the input signal waveform recorded on recording paper.

This invention digitally prints an input signal value at an arbitrary time of an input signal waveform or a calculated value obtained by arbitrarily processing the input signal value using a printer, and also prints the read input signal waveform portion on recording paper. The present invention is characterized in that marks to be displayed are recorded.

Embodiments of the invention will be described with reference to the drawings. The figure shows an example in which the present invention is applied to a multi-pen recorder. 1a to 1n are input terminals, 2a to 2n are preamplifiers, and the outputs thereof will be described below as input signals x ₁ to xn. 3 is a multiplexer which sequentially receives each input signal and sequentially sends it out as an output.
4 is a microcomputer used as an arithmetic processing unit; a central processing unit 5; a memory (RAM) 6 for storing arithmetic results, arithmetic processing contents, etc.; a memory (ROM) 7 for storing programs for each arithmetic operation;
AD convert the input signal from multiplexer 3
It is comprised of an AD converter 8, DA converters 9a-9n for converting digital values of each input signal into analog values, an input port 10, an output port 11-13, a clock oscillator 14, and the like. 15 is a data bus.

The output port 11 switches the inputs of the multiplexer 3 according to the contents of the program and outputs signals to be sequentially output. The output from multiplexer 3 is converted into a digital value by AD converter 8,
It is stored in the memory 6 via the central processing unit 5. The stored data is then converted into analog amounts for each channel by the DA converters 9a to 9n according to the program, and then converted into analog amounts for the position servo system 16a.
~16n. The position servo system drives the pens 17a to 17n according to input signals applied thereto. 18 is a recording paper, on which each pen 1
Recorded by 7a-17n. Reference numeral 19 is a feeding motor (step motor) for transporting the recording paper. There is no particular difference in these configurations from a normal multi-pen recorder.

Reference numeral 21 denotes a processing setting section, which is composed of, for example, a keyboard, and is used to set the transport speed of the recording paper 18, printing items of the printer, which will be described later, and the like. The setting contents are sent to the central processing unit 5 via the input port 10. The transport speed of the recording paper 18 is determined by the central processing unit 5.
As a result, the clock pulse from the clock oscillator 14 is frequency-divided according to the calculation result according to the setting contents, and the frequency-divided pulse is sent from the output port 12 to the driver 22. Pulses from driver 22 are sent to step motor 19. The step motor 19 rotates at a speed corresponding to the frequency of this pulse.

Reference numeral 23 denotes a printer, to which the calculation results from the central processing unit 5 are sent via an interface 24. In a simple example, the content printed by the printer 23 is a digital value of each input signal at an arbitrary time. Other examples include differential, integral, and other calculated values of input signals at arbitrary times. These calculations are performed by the central processing unit 5 and a program in the memory 7 when set by the processing content setting section 21. At this time, a mark is also placed on the recording paper at a location corresponding to that time. An example of this is shown in FIG. 2, where each input signal is printed on the recording paper 18.
When curves A to N are recorded for x ₁ to x _o , any time (the time axis on the recording paper is
8, that is, the axis along the direction of the arrow. )
When the digital values of each input signal are printed on the chart 25 by the printer 23 as shown in FIG.
Record 6.

To record this mark 26, a printer 23 is sent via its digital value interface 24.
, a signal to that effect is sent to the driver 27 via the output port 13. As a result, the output from the driver 27 drives the marker 28 facing the recording paper 18, resulting in a mark 2 as shown in FIG.
Record 6. Note that instead of this recording, position servo systems 16a to 16n are recorded via DA converters 9a to 9n.
Alternatively, a signal may be applied to the foot that causes the pen to move slightly horizontally. At this time mark 26
are attached to the recording curves A to N as shown in FIG.

As mentioned above, FIG. 3 shows an example of printing by the printer 23, in which the value of each input signal (or the calculated value obtained by its predetermined calculation formula) at the time when the mark 26 is attached is printed as a digital value. ing. ``CH <sub>1</sub> '' to ``CH _o '' are indications indicating each channel, and a digital value is printed on the right side thereof. When printing is performed by the printer 23 at every arbitrary period T, the first printing may be set as "NO ₁ ", and the subsequent printing may be performed as "NO _k ". This period T is set by the processing content setting section 21. The setting contents are sent to the central processing unit 4 like other setting contents, and are sent to the memory 6.
is stored in memory. Thereafter, each time the period T elapses, the digital value of the input signal at that time is transferred to the printer 23.
At the same time, a timing signal for printing is sent to output port 13 or a certain digital value is sent to DA.
given to the converter.

As described in detail above, according to the present invention, when a data processing value such as an input signal value or its calculated value is printed by a printer, a mark is attached to a portion of the recording paper that corresponds to the portion exhibiting the input signal value. As a result, the correspondence between the printed value and the portion related to that value can be immediately understood at a glance, and misreading of the recorded curve and other accidents can be prevented from occurring.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the invention, FIGS. 2 and 4 are plan views showing examples of recording on recording paper, and FIG. 3 is a plan view showing examples of printing by a printer. 1a-1n...input terminal, 3...multiplexer, 4...arithmetic processing unit, 17a-17n...pen, 18...recording paper, 23...printer, 25...
...Chart, 26...Mark.

Claims (1)

[Claims] 1. In a pen recorder that drives a pen in response to an input signal given as an analog value and records it on a recording paper, the digital value of the input signal or its calculated value at an arbitrary time is recorded on a chart different from the recording paper. A pen recorder comprising a printer for printing and a device for recording a mark indicating a portion exhibiting a digital value printed by the printer at a location on the recording paper corresponding to the portion.