JPS5810685B2 - recorder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention includes a plurality of input circuits and a recording mechanism (hereinafter simply referred to as a recording system).

).

In this type of recorder mentioned above, when recording by dividing the entire width of the recording paper into channels, each recording width becomes narrower, but there is no time lag between each pen, so there is no temporal correlation between multiple signals. It has the advantage of being convenient for managing relationships.

On the other hand, recorders in which the recording width of each recording system is close to the total recording paper width have the advantage of being able to record with high precision because the recording width is wide, but on the other hand, the positions of the pens are shifted from each other so that they can freely cross each other. Therefore, even if they are recorded at the same time, a time difference inevitably occurs in the recording, making it inconvenient to read the time relationship.

The present invention eliminates the above-mentioned drawbacks of the latter type of recorder, and by delaying the input signal by the time determined by the longitudinal shift of the pen and the recording paper running speed, it is possible to By providing a delay time corresponding to the pen difference, recording with no time difference can be obtained on the recording paper.

First, a conventional recorder will be explained with reference to FIGS. 1 and 2.

FIG. 1 shows a block diagram of a conventional two-channel recorder.

In the figure, 1, 2, 8.9 are input terminals, 3.10 is a sliding resistor that generates an internal voltage corresponding to the pen position, and 4.
11 is a reference voltage source, 5 and 12 are balanced amplifiers, 6 and 13 are servo motors that drive a pen and a sliding resistor, which will be described later, and 7
．． 14 is a pen, 15 is a recording paper, 16 is a chart motor for moving the recording paper 15 over time, and 18 is a chartmorph drive pulse generator which generates a plurality of pulse signals corresponding to the feeding speed of the recording paper 15.

17 is a recording paper feed speed selection switch.

To outline the operation of a conventional recorder using this diagram, the difference (Ex - E
s) is amplified by the balanced amplifier 5 and rotates the servo motor 6.

This rotation of the motor 6 moves the slider of the sliding resistance 3 in a direction that brings (Ex-Es) closer to zero, and EX-Es=0.
At the position, the input of the balanced amplifier 5 becomes zero, and the servo motor 6
stops.

If the input voltage EX changes from this state, the differential voltage (Ex-Es
) is no longer zero, the output of the balanced amplifier 5 appears, operating the servo motor and making the differential voltage zero again.

In this way, the position of the slider of the sliding resistor 3 always follows the input terminal EX, so if the pen 7 is mechanically connected to this slider, the input voltage can be recorded.

Note that the recording paper 15 is driven by a chart motor 16 in a direction perpendicular to the moving direction of the pen 7, but if a pulse motor is used as the chart motor 16, the feeding speed of the recording paper 15 can be adjusted by changing the repetition frequency of the drive pulse. can be changed.

Of course, a multi-channel recorder is equipped with a slip resistor, reference voltage source, balanced amplifier, servo motor, pen, etc. for each channel, and each channel can record input signals independently.

FIG. 2 shows a part of the structure of the pen portion of a two-channel recorder in which each pen can move over the entire recording width of recording paper.

Here, 111 and 121 are the main sliding shafts, 112 and 122 are the pen holders, and 113° and 123 are the sub sliding shafts that hold the pen holder 1.
12, 122 also serves to prevent rotation around the main sliding shafts 111, 121.

114 and 124 are ink tanks, 115 and 125 are pens, 116 and 126 are tension threads tied to the pen holders 112 and 122, and 117 and 127 are tension threads 116 and 12.
There are 6 guide pulleys, one each on the left and right.

118° and 128 were directly connected to servo motors 119 and 129.

It's a pulley.

Further, 130 is a recording paper, and 110 degrees and 120 are recording examples, which show how even if the same input signal is applied, a time difference corresponding to the longitudinal shift of the pens 115 and 125 occurs.

As described above, conventional recorders have the disadvantage that it is inconvenient to read the mutual time relationship because a time difference occurs corresponding to a preset longitudinal shift of the pen.

An embodiment of the present invention will be described below with reference to FIGS. 3 and 4.

FIG. 3 is a block diagram of a three-channel recorder according to one embodiment.

In the figure, 1 and 2 are input terminals of the first channel, 3 is a slip resistor, 4 is a reference voltage source, 5 is a balanced amplifier, 6 is a servo motor, 7 is a pen, 15 is a recording paper, 16 is a chart motor, and 17 is a A recording paper feed speed selection switch 18 is a chart motor drive pulse generator.

8 and 9 are input terminals of the second channel, 20 is an isolation amplifier that has the function of insulating the output, 21 and 22 are input terminals of the third channel, 23 is an isolation amplifier similar to the above 20, and 24 is an isolation amplifier. The first switch 25, which switches the outputs of 20 and 23, is an input amplifier and has the function of amplifying the input signal and shifting the DC level at the same time.

26 is a DC level adjuster that changes the level of the input signal.

27 is an analog-to-digital converter that converts the magnitude of the input signal into numbers.

Further, 28 is a switch for switching the output of the analog-to-digital converter 27 to the next stage shift register 29 or shift register 30, and is interlocked with the first switch 24.

The shift register 30 has the function of storing numerical values obtained by digitizing the input signal of the second channel, and at the same time, transmitting the oldest data from the output terminal every time the input signal is read.

A digital/analog converter 31 receives the digitalized signal and converts it into an analog signal corresponding to the digital signal.

32 is an output amplifier that amplifies or attenuates the magnitude of the signal and simultaneously shifts the MR level.

33 is a DC level adjuster, 34 is a slip resistor, 35 is a reference voltage source, 36 is a balanced amplifier, 37 is a servo motor, 3
8 is a second channel pen.

The shift register 29 operates to store data obtained by converting the input signal of the third channel into numbers.

39 is a digital/analog converter, 40 is an output amplifier, 41 is a DC level regulator, 42 is a slip resistance, 43 is a reference voltage, 44 is a balanced amplifier, 45 is a servo motor,
46 is a third channel pen, and 47 is a control pulse generator.

Next, the operation of one embodiment of the present invention will be explained with reference to FIG.

The input signal of the first channel is directly connected to the balanced amplifier 5 and drives the pen 7 via the servo motor 6, but the input signals of the second and third channels are first led to the isolation amplifiers 20 and 23, respectively. , here people,
After completely insulating the DC level of the output, one of them is selected each time by the first switch 24 and input to the input amplifier 25.

Here, the signal is amplified and simultaneously shifted to match the required level of the analog-to-digital converter 27.

The output of the analog-to-digital converter 27 is transferred to either shift register 29 by the second switch 28.
Or it is sent to 30, but in this case switch 28
is linked to switch 24, so switch 24 is the second
When connected to the channel side, the output of the analog-to-digital converter 27 is connected to a shift register 30.The shift register 29.30 stores the input signal and outputs it at the same time with a delay corresponding to the capacity of the register. It also has a so-called signal delay effect.

Now, assume that the mutual longitudinal displacements of the pen 7, the pen 38, and the pen 46 are 5 mm each, and the capacity of the shift register 30 is 50 mm.
bit, the capacity of shift register 29 is 50X2=100
1 bit each time the recording paper 15 is fed by 0.1 mm.
If the shift register is sent one time at a time, the output of the shift register 30 will be obtained with a delay of the time that the recording paper 15 is fed, while the output of the shift register 29 will be obtained with a delay of the time that the paper is fed by 10 am. .

The outputs of the shift registers 29 and 30 are converted back into analog signals similar to the input signals by digital-to-analog converters 31 and 39, and shifted to the original DC level by output amplifiers 32 and 40, and then sent to the respective mosaic amplifiers. 36, 44, pen 38. by the surf motors 37, 45.
46.

The control pulse generator 47 receives the chart motor drive pulse from the chart motor drive pulse generator 18, first switches the switches 24 and 28, and then operates the analog-to-digital converter 27.

After the operation of the analog-to-digital converter 27 is completely completed, the shift register 30 is driven, and then the switch 24 is driven.
After switching and 28 to the third channel side and performing the same operation, data is sent to the shift register 29.

After this, the switches 24 and 28 are again switched to the second channel side and the above-described operation is repeated.

In the embodiment shown in FIG. 3, the control pulse generator 47 receives pulses from the chart motor drive pulse generator 18, but the configuration may be reversed.

As described above, according to the present invention, if the capacity of each shift register is changed, a difference is caused in the signal delay time. Therefore, for example, the pen 38 is attached before the pen 7, and the pen 46 Even if the 3-channel recorder is installed further ahead of pen 38, the drive signal for pen 38 lags behind the drive signal for pen 7 due to a shift register, and the drive signal for pen 46 is delayed by another shift register. Furthermore, since there is a delay, the deviation between each pen can be completely corrected by appropriately selecting the pen interval, the capacity of the shift register, the recording paper feeding speed, the sampling period of the analog-to-digital converter, etc.

In addition, although FIG. 4 shows an example of recording the same human input signal using the circuit of the present invention, despite the pen difference,
It can be seen that there is no time difference in the recorded results.

Note that this case shows the case of a two-channel recorder, and each part is given the same number as in FIG. 2.

The present invention has the above configuration, and has the advantage that even if a plurality of pen positions are shifted from each other, no difference in recording time occurs.

Furthermore, the present invention has the advantage that among the plurality of circuits for delaying each input signal of the plurality of channels, the analog-to-digital converter can be shared by the plurality of channels.

[Brief explanation of drawings]

Figure 1 is a block diagram of a conventional two-channel recorder;
The figure shows the structure of the pen part of a conventional two-channel recorder.
FIG. 3 is a block diagram of a recorder according to an embodiment of the present invention, and FIG. 4 is a diagram showing a part of the structure of the pen portion of the recorder and an example of recording. 7.38.46...Pen, 15...Recording paper, 18...Chart motor drive pulse generator, 24°28...Switch, 27.・・・・・・
・Analog-digital converter, 29, 30...
・Shift register, 31°39...Digital-to-analog converter.

Claims (1)

[Claims] 1. N pens installed at different intervals in the recording paper feeding direction, one analog-to-digital converter, a person who operates the analog-to-digital converter, and a pair of switch circuits to switch the output. , receives the output of the analog-to-digital converter via the switch circuit (N-1)
shift registers, and (N-1) digital-to-analog converters that receive outputs from the shift registers, and drive the valley pen based on the outputs of the digital-to-analog converters, and A recorder characterized in that the input signal is delayed by a time corresponding to the pen difference by controlling the pair of switch circuits, the analog/digital converter, and the shift register with control pulses corresponding to the paper feed speed.