JPH0267919A - Graphic meter - Google Patents

Abstract

PURPOSE:To improve accuracy in reading of the result of recording by operating the distance between a previous recording position actually recorded and the latest recording position to be recorded on the basis of stored data and striking a point only when said distance exceeds a predetermined value whereby striking points are not overlapped. CONSTITUTION:When a set value of the feed speed of a chart and an input signal are inputted through an input circuit 2, a controlling command means 20 generates a controlling command to a chart motor driving means 5, a transverse motor driving circuit 8 and a pen selecting motor driving circuit 6. A chart is hence advanced and at the same time, a pen is moved. A recording position operating means 21 sequentially operates the recording position from a reference point of the chart, and the result of the operation is stored by a storage means 22. A striking point distance operation means 23 operates, on the basis of the stored recording position data, the distance between a previous recording position and the present recording position, thereby determining whether or not the distance exceeds a predetermined value. If the distance is beyond the predetermined value, a striking command means 24 generates a striking command to an up-down motor driving circuit 7.

Description

[Detailed Description of the Invention] [Objective of the Invention] (Industrial Application Field) The present invention provides a recorder that makes dots by moving a pen to a position corresponding to an input signal in a direction that intersects the feeding direction of a chart. It is related to.

(Prior Art) In many conventional recorders of this type, the chart feed speed and pen dotting period are set, and for example, the dots on the chart are arranged at appropriate intervals through trial and error. The feed rate of the chart was determined.

(Problem 8 to be Solved by the Invention) In the conventional recorder described above, if the chart speed is set low with very little input fluctuation, ink may overlap and smear at the same time as the dot positions overlap.

As an example, if you use a pen with a dot diameter of 0.5 cm, set the chart speed to 10+w/h, and set the dot period to 15 seconds, you will make 12 dots on a 0.5 inch circle. As a result, the ink bleeds over a width of 5II11, resulting in a problem in that the reading accuracy of the recorded result becomes low.

This invention was made to solve the above problems, and can prevent ink bleeding even when the chart feeding speed is low and the input signal level changes slightly, thereby improving the reading accuracy of recorded results. The purpose is to obtain a recorder that can be significantly improved.

[Structure of the invention]

(Means for Solving the Problems) FIG. 1 is a block diagram showing the configuration of the present invention, in which when a chart feed rate set value and an input signal are input via the input circuit 2, a control command is issued. Means 20 provides control commands to chart motor drive circuit 5, traverser motor drive circuit 8 and pen selection motor drive circuit 6. As a result, the chart is fed, the pen is moved to a position corresponding to the input signal in a direction perpendicular to the feeding direction of the chart, and an appropriate pen is selected. Further, when the chart feeding speed and input signal are inputted via the input circuit 2, the recording position calculation means 21 sequentially calculates the recording position from the reference point of the chart, and furthermore, the recording position storage means 221 and the dot information The storage means 222 is configured to store the calculated recording position and information as to whether or not a dot has been placed at this recording position over a plurality of calculation cycles. Then, based on the recording position information stored here, the hitting point distance calculation means 2
The distance between the previous recorded position where the number 3 was actually recorded and the current recorded position is calculated, and it is determined whether this distance exceeds a predetermined value. Here, if the predetermined value is exceeded, the dot command means 24 gives a dot command to the up-down motor drive circuit 7 to perform dot scoring.

(Function) In this invention, the recording position from the reference point of the chart is calculated sequentially, and the calculated recording position and information on whether or not a point has been placed at this recording position are stored over a plurality of calculation cycles. Based on the stored data, the distance between the previous recorded position and the current recorded position is calculated, and a dot is made only when this distance exceeds a predetermined value. Ink smearing can be eliminated even when the feed speed is low and the input signal level changes only slightly.

(Embodiment) FIG. 2 is a schematic diagram of an embodiment of the present invention. In the figure, a chart motor 9 having a chart motor drive circuit 5 rotates a chart feed roll to send a chart 15 downward in the drawing. A traverser 13 is provided above the chart feed roll and is movable in a direction perpendicular to the moving direction of the chart 15, that is, in the lateral direction of the drawing. It is moved to a position according to the input signal. Further, a pen wheel 14 in which six pens are arranged in the circumferential direction is rotatably attached to the tip of the traverser 13, and a pen selection motor 10 having a pen selection motor drive circuit 6 rotates the pen wheel 14. , select different pens in turn. The traverser 13 can be rotated slightly around the axis, and when the up-down motor 11 having the up-down motor drive circuit 7 rotates the traverser 13, the pen wheel 14 is lowered and the chart 15 is moved. It is now possible to hit points.

On the other hand, in order to give control commands to the chart motor drive circuit 5, pen selection motor drive circuit 6, up/down motor drive circuit 7, and traverser motor drive circuit 8,
A PUI, a ROM 3 and a RAM 4 are provided, of which a signal input via the input circuit 2 is applied to the CPUI.

The ROM3 is used to write control procedures and fixed data necessary for the CPUI's arithmetic processing, and is provided to the CPUI as necessary.The RAM4 is used as a working area for the CPUI's arithmetic processing or as an input/output buffer. .

The operation of this embodiment configured as described above will be described below.

First, it is assumed that the set value of the feed speed of the chart 15 and six types of input signals to be recorded are applied to the CPUI via the input circuit 2. Therefore, the CPU 1 gives a command to the chart motor drive circuit 5 in accordance with the set value of the feeding speed of the chart 15, thereby sending the chart 15 downward in the drawing at the set speed. Further, the CPUI sequentially gives commands corresponding to the magnitude of each of the six types of input signals to the traverser motor drive circuit 8 at predetermined time intervals, for example, 2.5 seconds, thereby causing the traverser 13 to It is moved to a position according to the signal level. At the same time, the CPU provides the traverser motor drive circuit 8 with a pen selection command corresponding to the input signal that has given the command, thereby selecting a pen corresponding to the type of input signal.

Next, the CPUI gives a descending command to the up-down motor drive circuit 7 according to the processing procedure shown in FIG. 3, thereby performing dotting. In this case, CPU1 performs step 101.
In step 110, the recording position P from the reference position of the chart 15 is determined based on the feed speed of the chart 15 and the level of the input signal of type 68, and in step 110, this recording position and dot information indicating whether or not a dot was actually hit are determined. is stored in RAM4.

Subsequently, in step 102, the diameter of the dot is determined to be 0.5,
Assuming that the dot period is 5 seconds and the chart feed speed is Smm/h, the number of dots to be made in the range in which the chart moves by 0.5 is calculated according to the following equation.

Here, if the number of dots C is smaller than 1 (rounded to the nearest whole decimal point), there is no possibility that the dots overlap, so it is possible to make a dot every dot cycle. If the number of hits C is 1 or more, there is a possibility that the dots overlap, so in the next step 103 it is determined whether the number of dots C is 1 or more.

If the number of dots C is 1 or more, in step 104 it is determined whether or not the n (n-1 to 11) previous recording position was actually dotted. 0”. Here, if it is assumed that the nth previous recording position was dotted, then in step 105 it is checked whether the distance between the dotted recording position and the most recently calculated recording position exceeds ±0.5. This is done in step 103 with 0
．． Even if it is determined that there is a possibility that the dots will be hit more than once in the five signal widths, the dots will not overlap depending on the fluctuation of the input signal level, so this is checked in step 105. If the dots do not overlap in step 105, and if it is determined in step 104 that no dots have been made so far, in step 106, 1 is subtracted from the number of dots C and the processes of steps 103 to 106 are repeated. Execute.

On the other hand, if it is determined in step 105 that the distance between the previous dot and the current recording position is 0.5 or less, that is, if it is determined that the dots overlap, step 10
Rewrite the recording position information and dot information in step 7, and then
At step 108, "0" indicating that no dot was made is written in the previous dot information writing position.

Next, if the number of points C is 1 or less in the determination in step 103, it means that a point can be made, and step 109
, rewrite the recording position information and dot information, and then
In step 110, "1" indicating that a dot has been made is written at the current dot information writing position, and at the same time, the recording position information is written, and in step 111, a command is given to the up-down motor drive circuit 7 to do a dot.

Through this process, if there is a previous dot within a certain range (within a circle with a diameter of 0.5 degrees) of the position to be dotted this time, it will not be dotted, thereby preventing overlapping dots and ink bleeding. It can be prevented.

Among the processing steps described above, the processing in step 101 is the first
This corresponds to the recording position calculation means 21 in the figure.

Further, the processing of steps 102 to 106 corresponds to the hitting point distance calculation means 23 in FIG. Also, step 107
The processing from step 1 to 110 is stored in the storage means 22 of FIG.
11 correspond to the dot command means 24 in FIG. 1, respectively.

In the above embodiment, the dot diameter range of 0.5+am was never overshot, but instead, the range for determining the presence or absence of dots was narrowed to reduce the number of overshots compared to the conventional device. Ink smearing can be prevented.

In the above embodiment, the pen selection motor 10 is provided on the traverser 13 to select the pen wheel 14, and further,
Although a recorder in which the pen wheel 14 is raised and lowered by the up-down motor 11 has been described, the present invention is not limited to this.
Of course, the present invention can also be applied to a case where a solenoid is used instead of the up-down motor 11.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, the recording position from the reference point of the chart is calculated sequentially, and multiple sets of calculated recording positions and information on whether or not a point has been recorded at this recording position are stored. Based on the stored data, the distance between the recorded position where five points were actually made and the latest recorded position is calculated, and a point is made only when this distance exceeds a predetermined value that prevents the dots from overlapping. Because
Even when the chart feeding speed is low and the input signal level changes only slightly, it is possible to eliminate ink smearing, which has the effect of significantly improving the reading accuracy of recorded results.

[Brief Description of the Drawings] Fig. 1 is a block diagram showing the configuration of the present invention, Fig. 2 is a schematic block diagram of an embodiment of the invention, and Fig. 3 is a block diagram for explaining the operation of the embodiment. It is a flowchart. 2... Input circuit, 5... Chart motor drive circuit,
6... Pen selection motor drive circuit, 7... Up/down motor drive circuit, 8... Traverser motor drive circuit, 9... Chart motor, 10... Pen selection motor, 11... Up/down Motor, 12... Traverser motor, 13... Traverser, 14... Pen wheel, 15... Chart, 20... Control command means,
21... Recording position calculation means, 22... Storage means, 2
3... Point distance calculating means, 24... Data updating means, 25... Point commanding means.

Claims (1)

[Claims] In a recorder that makes a point by moving a pen to a position corresponding to an input signal in a direction intersecting the feeding direction of the chart, the reference point of the chart is determined based on the feeding speed of the chart and the magnitude of the input signal. a recording position calculation means for sequentially calculating a recording position from , a storage means for storing the calculated recording position and information as to whether or not a dot has been placed at this recording position over a plurality of calculation cycles; A point distance calculation means for calculating the distance between the previous recorded position and the current recorded position where the point was actually hit among the recorded positions, and determines whether this distance exceeds a predetermined value; A recorder characterized in that it is equipped with a hitting point command means for commanding a hitting point when the distance between a previous recording position and a current recording position exceeds a predetermined value.