JPH0221727B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a multi-pen recorder. As is well known, pen recorders, whether single pen or multi-pen, generally perform recording by transporting recording paper at a constant speed, that is, time-based recording. However, as measurement items have recently become more complex and diversified, XY records, deviation records, etc., are sometimes required. However, such recording is completely impossible with the time-based recording pen recorder described above, and a recorder must be prepared for each recording purpose. An object of the present invention is to enable one multi-pen recorder to be used not only for time-based recording but also for recording based on any other element. In addition to transporting the recording paper at a predetermined speed in a multi-pen recorder, this invention also uses arithmetic control means to calculate an arbitrary dependent function using one or more of the input signals of the multi-pen recorder as an independent variable. It is characterized by controlling the drive of each pen and the transport of recording paper. Embodiments of the invention will be described with reference to the drawings. 1a
-1n are input terminals of the multi-pen recorder, and input signals are given to each of them. Each input signal is amplified by preamplifiers 2a-2n. This amplified output will be described below as input signals x ₁ to x _o of the multi-pen recorder. This input signal is sent to multiplexer 3
is input. This input work and subsequent output work are controlled by signals from output port 4. The output from the multiplexer 3 is converted into a digital value by the A/D converter 5, and the output is sent to the data bus 6.
The data is then taken into the central processing unit 7 and then stored in the memory (RAM) 8. A clock oscillator 9 outputs a clock signal of a constant period, which is coupled to the central processing unit 7 via the data bus 6.
This is mainly used when transporting the recording paper at a constant speed, ie when performing time-based recording. Reference numeral 10 denotes a function conversion setting section, which selects and sets each function to be described later when recording the function. Future configuration signals are coupled to the data bus 6 via the input port 11. 12 is a memory (ROM) in which programs for processing input signals and other signals are written. Specifically, each input signal x ₁ to x _o is taken into the central processing unit 7 and stored in the memory 8, and the data in the memory 8 is sent to the central processing unit 7 according to a setting signal from the function conversion setting section 10. A program is executed to perform calculations and take out the calculation outputs as drive signals for each pen or as a drive signal for recording paper, which will be described later. The calculation output from the central processing unit 7 is converted into an analog quantity by the D/A converters 12a to 12n.
Let this conversion output be y ₁ to y _o . Each pen is driven by this output, and in order to do so, the position servo mechanisms 13a to 1 operate based on each output.
3n is prepared. This mechanism is already well known, and an example thereof is shown in FIG. The mechanism is a comparator to which the converted output y is given as input.
Consists of CP, servo amplifier AM, servo motor SM, and position detector PD. Servo motor SM
is driven based on the output of the servo amplifier AM, which drives the pen described later. Position detector PD consisting of a resistor to which fixed pressure is applied at the same time
The brush is driven, and its potential is negatively fed back to the comparator CP. As a result, the pen is driven by a length corresponding to the converted output y. Pens 14a to 14n are driven by the above-mentioned servo mechanism in accordance with the respective conversion outputs _y1 to _yo . A recording paper 15 is conveyed by a feeding motor (for example, a step motor) 16. Note that the pen is driven along a direction perpendicular to the direction in which the recording paper is transported. The rotation speed of the motor 16 is controlled as follows. For this control, the clock signal from the clock oscillator 9 is sent to the central processing unit 7, where it is appropriately calculated and frequency-divided. This frequency division is performed to obtain a pulse period that allows the motor 16 to rotate at a desired rotational speed.
At this time, the motor 16 rotates in a constant direction at a predetermined rotational speed, and the recording becomes time-based recording. In the case of other recordings, the central processing unit 7 performs a predetermined calculation based on the input signal, and the motor 1 is
6 is controlled. In this calculation, the central processing unit 7 may take out any one of the input signals and use this as the calculation result, or calculate the deviation of any one input signal from other input signals and use this as the calculation result. It may be a calculation result, and this calculation is arbitrary. This calculation program is stored in the memory 12 in advance. The calculation output from the central processing unit 7 is given to the motor 16 from the output port 17 via the drive circuit 18. In the case of the above-mentioned time-based recording, the recording paper 15 is transported at a constant speed in a fixed direction, but in the case of other recordings, the transport direction of the recording paper may be reversed. Therefore, since it is necessary to know the transfer amount, a memory (RAM) 19 is prepared. The data given to the output port 17 is given here, and the amount of movement of the recording paper in one direction is added for each recording, and the amount of movement of the recording paper in the opposite direction is subtracted. This makes it clear from the beginning how much the paper has been transferred in which direction. In the case of time-based recording, record paper 1 as described above.
5 is transported in a constant direction at a constant speed. Each pen 14
a to 14n are driven in a direction perpendicular to the transport direction according to input signals x1 to _xo . If the driving distance of each pen is y1 to _yo for each input signal x1 to _xo , it can be expressed as y1=x1· _y2 = _x2 ..., _yo = _xo . Also, if the transport distance of the recording paper is yx, it can be expressed by the relationship yx=t. FIG. 3 shows an example of recording on recording paper when each input signal changes in the form of a triangular wave. Next, if one of the input signals x1 to x _n is taken out and used to control _the motor 16 for transporting the recording paper, the input signal x _i
is sent from the central processing unit 7 to the output port 17. Each input signal is used to drive each pen in the same manner as described above. At this time, the relationship between y1 to y _o and x1 to x _o is the same as that of time base recording, but for yx, the relationship is yx = x _i . FIG. 4 shows an example of recording on recording paper in the case where each input signal changes in the form of a triangular wave. Since the input signal x _i is also assumed to change in the form of a triangular wave, for example, if the recording paper is transported in one direction when it is increasing, it is transported in the opposite direction when it is decreasing. Therefore, the data will be recorded as shown in FIG. As can be understood from this, this recording is performed in the same way as an XY recorder. That is, the input signals x1 to _xo (excluding x _i ) become input signals in the X direction of the XY recorder, and x _i becomes an input signal in the Y direction. Next, a case will be described in which one of the input signals x1 to _xo , for example, the input signal x1, is taken out and the difference between the other input signal and the input signal x1 is recorded. In this case, the difference is calculated by the central processing unit 7.
calculates and outputs the result of the calculation. Therefore, y1 to y _o at this time are as follows: y1=x1·y ₂ =x ₂ −x1·y ₃ =x ₃ −x1... y _o =x _o −x1. At this time, yx=t. FIG. 5 shows an example of this recording. As understood from the above example, each of y1 to y _o and yx becomes a dependent function with x1 to x _o and t as independent variables. Expressing this as a general formula, y1=f ₁ (x1・x ₂・…x _o ) y ₂ = f ₂ (x1・x ₂・…x _o ) 〓 y _o =fn (x1・x ₂・…x _o ) yx=fx(x1・_x2・... _xo・t). At this time, a program for determining the form of the function is stored in advance in the memory 12, and this program is arbitrarily selected and set by the function conversion setting section 10. Note that the function conversion examples are not limited to those described above, and it goes without saying that any type of function conversion is possible. As detailed above, according to the present invention, it is possible to record any function using each input signal as an independent variable in one multi-pen recorder.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a circuit diagram showing an example of a servo mechanism, and FIGS. 3 to 5 are for explaining recording examples according to the present invention. It is a top view showing a part of paper. 1a-1n...Input terminal, 2a-2n...Preamplifier, 3...Multiplexer, 7...Central processing unit, 9...Clock oscillator, 10...Function conversion setting unit, 13a-13n... Position servo mechanism, 1
4... Recording pen, 15... Recording paper.

Claims (1)

[Claims] 1. A multi-pen recorder equipped with a preamplifier that receives a plurality of input signals, a plurality of recording pens for recording on transferred recording paper, and a position servo mechanism that drives each of the recording pens. , the driving amount of each pen for recording on the recording paper a dependent function curve of an arbitrary function with each input signal and real time as input, and the input signal and real time as independent variables, and the recording paper Calculation processing means is provided for calculating the transfer direction and the transfer amount by using the output of the preamplifier as input, and the respective pens and recording paper are driven based on the calculation results of the calculation processing means, and the time In addition to reference recording, the multi-pen recorder executes XY-axis recording using at least one of the input signals as a reference signal, and calculation recording between each input signal.