JP3246311B2 - Multipoint recorder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a multipoint recorder, and more particularly, to save power of a dot driving pin when interpolating a blank portion where two or more input signals suddenly change at the same time and recording is interrupted. It relates to the multipoint recorder that was planned.

[0002]

2. Description of the Related Art After inputting analog signals from a plurality of channels and converting the analog signals into digital signals,
2. Description of the Related Art There is a multipoint recorder that performs predetermined arithmetic processing and records a value corresponding to the type and magnitude of an analog signal on recording paper in different colors by a raster scan method.

First, a schematic configuration and operation of such a multipoint recorder will be described with reference to FIG. In FIG. 4, reference numerals ₁₁ to 1 _{n denote} input terminals to which analog input signals are applied, and 2 denotes an input switching mechanism, which switches signals applied to the input signals ₁₁ to 1 _n for a predetermined time (for example, 0.2 Every second) and sends it out to the program gain amplifier 3. Reference numeral 4 denotes an A / D converter for converting an analog signal amplified to a predetermined size by the amplifier 3 into a digital signal.

A first memory 5 temporarily stores an output signal of the A / D converter 4. The data stored in this memory is subjected to a linearization operation in accordance with the type of input, for example, for display or recording. In order to correspond to a width of 250 mm in 0.1 mm steps, it is converted into a numerical value from 0 to 2500 and stored.

[0005] Reference numeral 7 denotes a paper feed mechanism using, for example, a pulse motor for intermittently running the recording paper 6, and reference numeral 8 denotes a drive circuit of the paper feed mechanism 7. Reference numeral 9 denotes a recording head that performs multipoint dot recording in a predetermined color corresponding to each input signal selected on the recording paper 6, and uses an ink jet head or a wire dot head. Reference numeral 10 denotes a driving circuit for the recording head 9;
Is a head scanner using, for example, a pulse motor for raster-scanning the recording head 9 in a direction orthogonal to the direction in which the recording paper travels.

The wire dot head is constructed as shown in FIG. 5, for example. The ink ribbon 91 is dyed in a band along the running direction, and the ink ribbons 91 are arranged so as to correspond to the number of color bands of the ribbon. The recording paper 6 has a plurality of hitting pins for transferring a predetermined color to the recording paper 6 by a specific drive, and moves at, for example, 0.1 mm / step when the recording paper 6 stops running. 12
Is a scanning circuit which sends out a signal for driving the head scanner 11 and sends out a digital signal corresponding to the position of the head 9, and 13 is a second memory which sequentially stores digital signals sent out from the scanning circuit 12. is there.

Reference numeral 14 denotes an operation control circuit using, for example, a microprocessor. The control circuit 14 includes all data corresponding to the input signal stored in the first memory and the recording head 9 sequentially stored in the second memory. The data corresponding to the position is read out, the data having the smallest difference from the data stored in the second memory 13 is detected from the data stored in the first memory, and the recording head is moved in accordance with the difference. When the difference is reduced to 0 by a predetermined amount, a control signal for causing dot recording of a predetermined color to be transmitted is transmitted. The control signal is sent after the recording position of each color is corrected.

Reference numeral 15 denotes a memory for storing characters, symbols and the like as a dot pattern and an operation procedure of the apparatus, 16 a display for displaying information related to measurement, 17
Is a drive circuit of the display 16. Reference numeral 18 denotes a setting keyboard for setting the operation mode of the apparatus, the type of input signal, recording range, alarm setting value, paper feed speed, and the like. Reference numeral 19 denotes a keyboard interface.

Reference numeral 20 denotes an input / output port comprising a photocoupler, and an input / output mechanism 2, an amplifier 3, and an analog section A
The / D converter 4 and other digital sections are completely insulated.
21 is a battery for backing up the memories 5 and 13;
Reference numeral 2 denotes an alarm circuit that detects a voltage drop of the battery 21, and P denotes a panel. Although not shown in FIG.
At least one end is provided with an end detecting means for generating an end signal when the recording head 9 reaches the position and resetting the position data of the recording head.

According to the above configuration, it is possible to realize a multipoint recording apparatus corresponding to a plurality of input signals. In such a multipoint recording apparatus, when data taken in the previous scan and data taken in the current scan suddenly change in a certain channel, portions before and after a sudden change in the signal are interrupted. In that case, it has a function of interpolating a broken blank portion.

FIG. 6A shows an example of an input of a certain channel and an abrupt change in the input. Reference numeral 6 denotes a recording paper wound in the Y direction from the top to the bottom of the figure.
First, as shown by the line segment A, an input having almost no fluctuation is plotted. Then, it is assumed that the output suddenly changes to the position b indicated by the line segment B at the time indicated by a, and thereafter changes gradually and becomes stable at the point c. In such a case, the sudden change part is blank. Therefore, in order to fill in the blank, the arithmetic unit constituting the multi-point recorder determines that the difference between the value at the point a and the input value at the point c exceeds a predetermined value, and replaces the blank portion with a predetermined hitting point. Interpolation is performed at intervals (between d shown in FIG. 6B).

[0012]

When input measurement from a plurality of channels is performed at multiple points by, for example, a wire dot method, a wire is generally driven by using a solenoid, and one wire is connected to one solenoid. Driven by Therefore, in a normal operation state, one wire (solenoid) corresponding to the input is sequentially driven. If the sudden change of the input is one channel, the interpolation is one color corresponding to the channel, that is, one wire is continuously driven, but the power consumption of the head is one solenoid.

When sudden changes in input occur simultaneously in two or more channels, the blank portion is continuously spotted in two or more colors, so that power consumption increases and the temperature of the coil driving the solenoid rises. Wire driving force decreases. Since it takes time until the raised temperature returns to the normal state, there is a problem that the printing quality of the dot is reduced during that time. SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a multipoint recorder which reduces power consumption when linearly interpolating a blank portion.

[0014]

According to the present invention, an analog signal is input from a plurality of channels, the analog signal is converted into a digital signal, and a predetermined operation is performed to perform a raster scan. In a multi-point recorder that records values according to the type and magnitude of the analog signal on recording paper in different colors, when two or more input signals of the plurality of channels change suddenly at the same time, in linear interpolation between before and after the sudden change is it heavy
This is characterized in that the interpolation of a certain portion is performed with one predetermined color. Hereinafter, the present invention will be described in detail based on an embodiment.

[0015]

FIG. 1 is a flowchart showing an interpolation processing flow of a multipoint recorder according to the present invention, and FIG. 2 is a diagram showing a conceptual diagram (a) of a buffer for linear interpolation data development and an example of a dot (b). In FIG. 3A, when there is a sudden change in the measurement input, a color number processed according to the contents of the sudden change is entered.
FIG. 3 is a conceptual diagram of the linear interpolation management table. Here, a description will be given of a multipoint recorder in which dots are printed in ten kinds of colors.

In the management table of FIG. 3, N1 to N10
Indicates the number of channels (sets) corresponding to 10 kinds of colors, and 001ch, 011CH, and 021ch indicate channel numbers. Here, three channels of 001ch, 011CH, and 021ch are N1.
Means that a dot is printed in a color corresponding to

In this management table, it is set so that the priority of the color becomes higher in the direction from N1 to N10. And N
The number of channels of colors corresponding to 1 to N10 is set by an operator before measurement. Since the configuration of the multipoint recorder is the same as that described in the conventional example, the description is omitted here.
4 is different.

FIG. 1 shows the operation from the start to the end while the carriage moves right to left and / or left to right in the recording width (one scan).
The description will be given according to the processing flow. , The memory contents of the previous data stored in the buffer for linear interpolation data development are cleared. Sets the address of N1 in the management table. , The color counter is set to 10.

A channel counter is set according to the contents specified in the interpolation management table (here, N1 is 3
Therefore, the value of the channel counter is set to 3.)
Advance the pointer by one. , The measured value of channel number 2 is read. Calculates the difference between the previously read measured value and the currently read measured value. If the difference exceeds the predetermined value, the result is YES, and the process proceeds to fill the interpolation buffer with the color number corresponding to N1. If the difference is equal to or less than the predetermined value, the input does not change abruptly and the process proceeds to subtract 1 from the counter.

In (10), the pointer is advanced by one.
In (11), it is determined whether or not the channel counter is 0 (here, the value of the channel counter is 3-
It is 2 because it is 1). If NO, go back ~
The operation up to (11) is repeated. If yes, here
This means that the processing has been completed up to channel 021, and the process proceeds to (12), where 1 is subtracted from the color counter. At (13), it is determined whether or not the color counter has become 0 (in this case, the process has been completed for the color corresponding to N1, so the result is NO), and the process returns to the address of N2 in the management table shown in FIG.

Here, since the number of channels to be printed with the color corresponding to N2 is 0, the subsequent operation is not performed, and (13) →
And returns to the channel set in the next N3 to execute the operation of (13) (here, the number of channels of the color corresponding to N3 is one 002 channel). When the above operation is repeated and the process proceeds to N10, the value of the color counter becomes 0, color data is developed based on the created interpolation buffer, and a blank portion caused by a sudden change in input of a plurality of channels is predetermined. Color priority N1 to N1
Interpolated according to 0.

Returning to FIG. 2, the diagram shown in FIG. 2 (b) shows a recording state at the time of sudden change of the input point hit by the multipoint recorder having the interpolation function according to the present invention. It shows the position corresponding to the recording width, and shows the case where the input sudden change occurs in the 021 and 002 channels (021
Channel has moved to the position of 8 → 20, and channel 002 has moved to the position of 13 → 17). Here, the 021 channel is printed with the color 1 corresponding to N1, and the 002 channel is printed with the color 3 corresponding to N3. As described above, the color 3 is set to a higher priority. Therefore, the portion where both overlap (the position of 13 → 17) is hit with the color 3 having the highest priority. Although the embodiment of the present invention has been described with respect to the example of the wire dot hitting method, the idea of the present invention can be applied to the ink jet method to print in one color which gives priority to interpolation of overlapping portions.

[0023]

As described above, according to the present invention, when two or more input signals of a plurality of channels are suddenly changed at the same time, when linear interpolation is performed between before and after the sudden change of the signals, they overlap.
Since the interpolation of the part is done with one predetermined color, it is possible to reduce the power consumption when linearly interpolating the blank part and realize a multi-point recorder that does not affect the print quality after sudden change recovery can do.

[Brief description of the drawings]

FIG. 1 is a flowchart illustrating an example of an embodiment of the present invention.

FIG. 2 is a diagram showing a conceptual diagram of a buffer for linear interpolation data development and an example of hitting points.

FIG. 3 is a conceptual diagram of a linear interpolation management table.

FIG. 4 is a diagram showing a configuration example of the present invention and a conventional example.

FIG. 5 is a diagram illustrating an example of a wire dot head.

FIG. 6 is a diagram illustrating an example of a hit point when an input is suddenly changed in a certain channel.

[Explanation of symbols]

 1 to 1n input terminal 2 input switching mechanism 3 amplifier 4 A / D converter 5, 13, 15 memory 6 recording paper 7 paper feeding mechanism 9 recording head 11 head scanner 12 head scanning circuit 14 arithmetic control circuit 16 display 18 keyboard 20 I / O port P panel

Claims (1)

(57) [Claims] An analog signal is input from a plurality of channels, and after converting the analog signal into a digital signal, a predetermined arithmetic processing is performed to obtain a value corresponding to the type and size of the analog signal in a raster scan system. the in multipoint recorder for recording on a recording paper in different colors, when two or more input signals of the plurality of channels is suddenly changed at the same time, when linearly interpolating between before and after a sudden change in the signal, heavy What
A multi-point recorder characterized in that interpolation of a predetermined portion is performed by one predetermined color.