JPH06297786A - Recording apparatus - Google Patents

Abstract

PURPOSE:To enable the automatic adjustment of recording speed of a recording apparatus so that the adjustment can be conducted while the apparatus being operated. CONSTITUTION:In a recording apparatus in which an input signal wave form is recorded for a folding recording sheet fed continuously at a set speed while a page head mark 5 corresponding to the position of a kinked line 4 being detected by the pair of a light emitting diode 6 and a phototransistor 7, the time of detecting the next page head mark 5 after the page head mark 5 detected previously is measured by CPU 10. The running speed of the folding recording sheet 1 is judged from the result of measurement whether or not the speed is in agreement with a set speed, and a control signal for adjusting the running speed of the sheet 1 in operation at the set speed based on the result of judgment is sent to an analog switch circuit 16 so that the recording speed is adjusted automatically by changing the value of resistance of an one- shot circuit 20 in a recording speed control loop L.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording apparatus for continuously recording various signal waveforms on recording paper, and more particularly to an apparatus capable of automatically adjusting a recording speed.

[0002]

2. Description of the Related Art In a recording apparatus using folding paper, a mark attached to the folding line position of the paper is detected to check the page top position of the paper, and various input signal waveforms are continuously output from the page top position. It can be recorded.
FIG. 6 shows a schematic configuration diagram of a recording apparatus of this type known in the related art. In this figure, the light emitted from the light emitting diode 26 to the outer edge of the recording paper 1 is detected by the phototransistor 27, and the light reception output is compared with the reference voltage V ₁ by the comparator 28, whereby the page top mark 5 is displayed. To be detected. On the other hand, the pair of the light emitting diode 23 and the phototransistor 24 is provided for detecting the presence or absence of the recording paper 1, and the light receiving output of the phototransistor 24 is compared with the reference voltage V ₂ by the comparator 25, so that the paper A break is detected. These detection signals are
It is taken into the microprocessor (CPU) 30 via the input / output port (I / O port) 29 and the bus 31. C
Upon receiving the detection signal of the page head mark 5, the PU 30 sends a control signal for stopping the recording paper 1 at this page head position until the recording start command is issued, before the recording of the signal waveform is started. It is output to the motor drive circuit 22 of the system. When the input signal waveform is captured and a recording start command is issued, the motor 2 that feeds the recording paper 1 is driven, so that the paper 1 runs at the set speed, and the signal waveform is printed on the paper 1 by the recording system (not shown). Are recorded continuously. On the other hand, when the CPU 30 receives the paper out detection signal, the CPU 30 sends a control signal for stopping the motor 2 and outputs an alarm for notifying the paper out. In addition, the leads connected to the bus 31
An operation program of the CPU 30 is stored in the only memory (ROM) 33, and various input signals and operation results in the CPU 30 captured during the operation are stored in the random access memory (RAM) 32. Stored temporarily.

Next, the structure of the control loop L for controlling the traveling speed of the recording paper 1, that is, the recording speed to a constant value will be described. The rotation speed of the motor 2 is detected by the Hall element 17, and the detection signal a (corresponding to FIG. 5A) is sent to the Schmitt circuit 19 to be shaped into a rectangular wave. This rectangular wave b (corresponding to FIG. 5B) is sent to the one-shot circuit 20 to which the variable resistor VR that determines the output pulse width τ ₁ is connected. This allows the one-shot circuit 2
From 0, the pulse width τ ₁ determined by the value of this variable resistor VR
Pulse signal c (corresponding to FIG. 5C) is output in synchronization with the rectangular wave b, and the frequency / voltage converter (F / V converter) 2
Sent to 1. In this F / V converter 21, the input pulse signal c is a voltage signal d (FIG. 5) proportional to the frequency.
(Corresponding to (d)), and the motor drive circuit 22
Sent to. As a result, the motor drive circuit 22 drives the drive signal e based on the voltage signal d (corresponding to FIG. 5 (e)).
Is generated and the motor 2 is driven. In this control loop L, when the rotation speed of the motor 2 is increased, feedback is applied so that the rotation speed of the motor 2 is decreased, so that the recording paper 1 can be run at a constant speed.

By the way, in the conventional recording apparatus, when the recording speed is finely adjusted at the time of shipment or during use, the following adjustment method has been adopted. First, for example, a rectangular wave of 1 Hz is input as an input signal waveform and recorded on the recording paper 1. Then, the pulse width of the recorded waveform is measured with a scale, the variable resistance VR of the one-shot circuit 20 is adjusted, and the recording speed is adjusted to the set speed.

[0005]

As described above, in the conventional recording apparatus, when the recording speed is to be adjusted, it is necessary to record a rectangular wave of 1 Hz for calibration and manually adjust the variable resistance VR. However, there is a problem that the adjustment is complicated. Further, the recording speed cannot be calibrated during the use of the apparatus, and the recording operation needs to be stopped when the adjustment is desired.

The present invention has been proposed in order to solve the problems of the prior art as described above, and enables the automatic adjustment of the recording speed so that the recording speed can be adjusted even while the apparatus is in use. It is an object of the present invention to provide a recording device according to the above.

[0007]

In order to achieve this object, the present invention provides an input signal to a folding recording sheet which is continuously fed at a set speed while detecting a page head index corresponding to a folding line position. In the recording device for recording, the time required to detect the next page top index following the previously detected page top index is measured, and the measurement result of this measurement means Determination means for determining whether or not the traveling speed of the folding recording paper matches the set speed, and the traveling speed of the current folding recording paper is adjusted to the set speed based on the determination result of this determination means. And a recording speed adjusting means for outputting an adjusting signal for outputting to a drive system for folding recording paper.

If the recording sheet has marks at equal intervals in the traveling direction, the recording speed is not limited to the folding recording sheet, but the mark serving as an index for detecting the traveling speed is detected to similarly record the recording speed. Can be adjusted.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of a recording device according to the present invention. In this figure, the folding recording paper 1 is run at a predetermined speed by transmitting the rotational force of the motor 2 to the paper feed roller 3 via a reduction gear mechanism (not shown). As shown in FIG. 2, the folding recording paper 1 is provided with a page head mark 5 indicating the head of the page at a position corresponding to the folding line 4. A pair of a light emitting diode 6 and a phototransistor 7 for detecting the page top mark 5 and detecting the paper shortage are confronting the outer edge of the paper 1. The light emitted from the light emitting diode 6 is reflected by the paper 1 and then detected by the phototransistor 7, and this detection signal (mark sensing signal) is sent to the amplifier 8
After being amplified by the analog / digital converter (A /
D converter) 9. In this A / D converter 9, the mark sensing voltage V _M is converted into a digital signal,
It is sent to the CPU 10 via the bus 11.

In the CPU 10, the mark sensing voltage V
_{In addition to} detecting paper out based on the A / D value of _M and detecting the page top mark 5 as the page top index,
The time required for the paper 1 to travel a distance corresponding to the page head marks 5 and 5 is measured, and based on the measurement result, it is determined whether the current running speed of the paper 1 matches the set speed. Are doing. Further, a speed adjustment signal is created based on this determination result and sent to the analog switch circuit 16 via the latch circuit 15. The recording speed adjustment data finally created by the CPU 10 is stored in an electrically rewritable ROM (EEPROM) 14, and after the adjustment is completed, the recording speed is set based on the data in the EEPROM 14. Thus, the CPU 10 constitutes a running time measuring means between the page head marks 5 and 5, a judging means for judging a deviation of the running speed of the sheet 1, and a recording speed adjusting means. The RAM 12 has a CPU 10
The signals and calculation results captured in are temporarily stored.

The control loop L constituting the paper drive system is constructed in the same manner as the conventional one, and comprises the Hall element 17, the Schmitt circuit 19, the one-shot circuit 20, the F / V converter 21 and the motor drive circuit 22. Become. The plurality of resistors R1, R2, R3, R4 connected to the one-shot circuit 19 in the control loop L are the analog switch circuit 1
6 is selected and the recording speed is adjusted.

Next, a series of operations of the recording apparatus thus constructed will be described with reference to the flowchart of FIG. This operation program is stored in the ROM 13. First,
When the mark sensing voltage V _M is A / D converted (step S1) and taken into the CPU 10, the A / D value of this mark sensing voltage V _M is a <b.
<C <determines whether the range of a <V _M <b defined by d (step S2). There is no light reflected from the light emitting diode 6 from the recording paper 1, and the mark sensing voltage V _M
If is a very small voltage in the range a <V _M <b, is confirmed to be out of paper, the alarm of for notifying the paper-out is issued. When the phototransistor 7 receives the reflected light from the page top mark 5 on the recording paper 1 traveling in the direction of arrow P without detecting the paper shortage, the mark sensing voltage V _M sharply drops as shown in FIG. When it is determined in step S3 that the mark sensing voltage V _M is in the range of c <V _M <d,
The detection of the page top mark 5 is confirmed. After the page top mark 5 is detected, the CPU 10 checks whether or not the next page top mark 5 is detected. If the next mark is not detected, the process returns to step S1 (step S4). If the next page top mark is detected, the time T until this mark is detected is measured (step S5). This measured value T is a value corresponding to the current traveling speed of the recording sheet 1 because the distance between the page head marks 5 and 5 is constant. Subsequently, the CPU 10 determines whether or not the measured traveling time T between the page head marks 5 and 5 is within the allowable error range T ₁ <T <T ₂ (step S 6). For example, the speed adjustment signal for selecting the resistors R1, R2, R3, R4 connected to the one-shot circuit 20 is sent to the analog switch circuit 16 via the latch circuit 15 (step S7). By repeating the above operation and changing the value of the connection resistance of the one-shot circuit 20 by the speed adjustment signal output from the CPU 10, the traveling speed of the sheet 1 can be finally adjusted to the set speed. . When the measured value T falls within the allowable error range T ₁ <T <T ₂ , and the adjustment of the recording speed is completed, the recording speed adjustment data at this time is EEPR.
It is stored in the OM 14, and thereafter, the recording speed is set based on this adjustment data (step S8). Also,
Since the data in the EEPROM 14 is non-volatile, the data in the EEPROM 14 is used for setting the recording speed even when the device is turned on and then restarted.

By such a series of routines for automatically adjusting the recording speed, the recording paper 1 is read at the timing of A1 when the page head mark 5 is read as shown in FIG.
If the speed is detected and the speed is automatically adjusted at the next timing A2, a continuous waveform such as a biological signal can always be recorded based on an accurate recording speed.

Although the folding recording paper 1 marked with the mark 5 is used as the page top index in the above-described embodiment, the page leading index is also used when the folding recording paper without the mark 5 is used. The recording speed can be automatically adjusted by detecting the polygonal line 4. For recording paper that is not folding recording paper,
The recording speed can be automatically adjusted by providing marks at predetermined equal intervals in the running direction of the paper and detecting the marks.

[0015]

As described above, according to the present invention, it is possible to detect a mark or a broken line as a page top index,
Since the recording speed can be automatically adjusted, there is no need to input a rectangular wave for calibration or use a troublesome adjustment method such as measuring the recorded rectangular wave with a ruler as in the past, and the recording speed can be adjusted. Can be greatly simplified. Further, this automatic adjustment can be performed even while the signal waveform is being recorded, and the problem that the recording operation must be stopped at the time of adjustment as in the conventional case does not occur.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a recording apparatus according to the present invention.

FIG. 2 is a diagram showing a page head mark and a mark sensing voltage V _M attached to a folding recording sheet.

FIG. 3 is a flow chart showing an operation of the recording apparatus of FIG.

FIG. 4 is a diagram showing timings for detecting the speed of a recording sheet and adjusting the recording speed.

FIG. 5 is an operation waveform diagram of a control loop in the paper drive system.

FIG. 6 is a block diagram of a conventional recording device.

[Explanation of symbols]

 1 Folding recording paper 2 Motor 3 Paper feed roller 4 Folded line 5 Page top mark 6 Light emitting diode 7 Phototransistor 8 Amplifier 9 A / D converter 10 CPU 11 Bus 12 RAM 13 ROM 14 EEPROM 15 Latch circuit 16 Analog switch circuit 17 Hall element 19 Schmitt circuit 20 One-shot circuit 21 F / V converter 22 Motor drive circuit

Claims (2)

[Claims] 1. A recording apparatus for recording an input signal while detecting a page top index corresponding to a folding line position on a folding recording sheet that is continuously fed at a set speed. Then, based on the measurement result of the required travel time between page top indexes for measuring the time until the next page top index is detected and the measurement result of this measurement means, the running speed of the folding recording paper matches the set speed. And a recording unit that outputs an adjustment signal for adjusting the current traveling speed of the folding recording paper to the set speed based on the determination result of the determination unit to the drive system of the folding recording paper. A recording apparatus comprising: a speed adjusting unit. 2. A recording apparatus for recording an input signal on a recording sheet which is continuously fed at a set speed, wherein the recording sheet is marked with a predetermined equal interval in the sheet feeding direction, and the previously detected recording sheet. Based on the measurement result of the required travel time between marks that measures the time until the next mark is detected after the mark on the paper and the measurement result of this measurement means, the running speed of the recording paper matches the set speed. And a recording speed adjustment for outputting an adjustment signal for adjusting the current traveling speed of the recording sheet to the set speed to the drive system for the recording sheet based on the determination result of the determining section. And a recording device.