JP2008229928A - Dot type recorder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dot type recorder which can always perform a stable linear interpolation recording motion in such a manner that the driving number of times of wire dots may not be sharply increased even when an input variation is large, or the input always varies. <P>SOLUTION: This dot type recorder is constituted in such a manner that a recording pen which reciprocates in the width direction of a recording paper may selectively be driven at a recording position which is linearly interpolated in order to keep the continuity of the dot recording. In the dot type recorder, a recording position thinning control section 110 which thins the recording position for the linear interpolation depending on the size of the variation of a measured value is installed. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a dot recorder, and more particularly to control of a dot recording operation.

  Recorders using recording paper are widely used in various fields, although recorders are becoming paperless because the measurement results recorded on the recording paper can be read whenever necessary.

  One type of recorder using recording paper is a dot recorder that records changes in measurement signals of a plurality of measurement channels using a common recording pen.

JP-A-62-91814

  Patent Document 1 discloses a dot-type recorder that switches a recording color by swinging a ribbon dyed with ink so that color bands are different in the width direction along the recording paper feeding direction. The ribbon is fed in the direction perpendicular to the feed direction of the ink, and the recording pen is reciprocated in the width direction of the recording paper, and assigned to each measurement channel of the ink ribbon at a position corresponding to the measurement data value of each measurement channel. An invention is disclosed in which a recording pen is selectively driven so as to strike a predetermined color band on a recording sheet.

  FIG. 8 is a conceptual block diagram showing an example of a conventional dot recorder. In the measurement unit 10, an A / D converter (not shown) converts an analog input signal into a digital signal at a predetermined measurement cycle (for example, 2.5 seconds), and the analog input signal of each measurement channel is sequentially switched. Entered. The output data of this A / D converter is stored in the RAM 20 as measurement data. The measurement data stored in the RAM 20 is dot-recorded by the recording pen drive system 30 at a recording cycle set by the user. In addition to the measurement data, the RAM 20 stores variable parameters such as measurement conditions.

  FIG. 9 is a block diagram of the main part of the recording part. The recording pen drive system 30 is configured to strike the ink ribbon B on the recording paper 43 with the recording pen A. That is, the ribbon control unit 31 and the ribbon drive mechanism 32 switch the recording color by swinging the ribbon B dyed with ink so that the color bands are different in the width direction along the feeding direction X of the recording paper 43. At the same time, ribbon feeding is performed in a direction Y perpendicular to the feeding direction X of the recording paper 43.

  The recording pen control unit 33 and the recording pen drive mechanism 34 correspond to the measurement data value of each measurement channel while reciprocating the recording pen A between 0% and 100% along the width direction of the recording paper 43. The recording pen A is selectively driven so that a predetermined color band assigned to each measurement channel of the ink ribbon B is hit on the recording paper 43 at the position. The recording cycle can be arbitrarily set by the operator as described above, and is set in association with the feeding speed of the recording paper 43.

  The recording paper drive system 40 includes a recording paper control unit 41, a recording paper motor 42, and a recording paper 43. The recording paper 43 is fed out at a predetermined speed set by the operator by a recording paper motor 42 whose rotation speed is controlled by the recording paper control unit 41.

  The setting operation unit 50 is used to set measurement conditions such as measurement ranges, alarm setting values, and recording paper feed speeds for each measurement channel. A switch, a rotary encoder, and the like are provided as an operation panel. The operator operates the setting operation unit 50 while referring to the display information on the display unit 60.

  The ROM 70 stores programs and fixed parameters for controlling the operation of the entire apparatus.

  As the external memory 80, a removable memory such as a floppy (registered trademark) disk or an IC card is used.

  The communication interface 90 is used to exchange control signals and measurement data with an external device.

  The CPU 100 performs various arithmetic processes such as a moving average calculation on the measurement data and controls the entire apparatus.

  The dot recording will be described. In the following description, the effective recording width of the recording paper 43 is 100 mm, the input is 6 channels, the measurement cycle is 1 second, and the trend recording cycle is 1 channel / 5 seconds (30 seconds / 6 channels). In dot recording, as shown in FIG. 10, the previous measurement result is recorded for each trend recording period. That is, in the trend recording cycle immediately after measurement # 0, the measurement value of measurement channel 1 included in the measurement results of channels 1 to 6 in measurement # 0 is recorded. In the trend recording cycle immediately after measurement # 5, the measurement value of measurement channel 2 included in the measurement results of channels 1 to 6 in measurement # 5 is recorded. In this manner, in the trend recording cycle immediately after measurement # 30 after 30 seconds, the measurement value of measurement channel 1 included in the measurement results of channels 1 to 6 in measurement # 30 is recorded.

In the dot recording operation, the following six steps are repeatedly executed for each measurement channel.
S1) Selection of recording color assigned to measurement channel by swinging shift of ribbon B S2) Scanning (movement) start of recording pen A S3) Dot recording by recording pen at recording position according to measurement value S4) End Stop of recording pen A upon arrival S5) Initial position return by swinging shift of ribbon B S6) Feeding of predetermined length of recording paper 43

  Measurement value of measurement channel 1 is recorded in purple, measurement value of measurement channel 2 is recorded in red, measurement value of measurement channel 3 is recorded in green, measurement value of measurement channel 4 is recorded in blue, measurement channel If the measurement value of 5 is recorded in brown and the recording color of the measurement channel is assigned so that the measurement value of the measurement channel 6 is recorded in black, the operation sequence as shown in FIG. 11 is repeatedly executed. .

  Here, paying attention to the recording operation of the measurement channel 1, only the measurement value of the measurement # 0 is recorded in the recording cycle RA among the 31 measurement values from the measurement # 0 to the measurement # 30. Only the measurement value of measurement # 30 is dot-recorded in the cycle RB, and the measurement results of measurement # 1 to measurement # 29 are not dot-recorded. As a result, as shown in FIG. 12A, when the measurement value of the measurement channel 1 fluctuates greatly, the interval between the dots is widened, and the continuity of trend recording is lost.

  Therefore, when the input value fluctuates, dot recording is inserted so as to perform linear interpolation between the dot recording position of the previous recording cycle RA and the dot recording position of the current recording cycle RB, thereby maintaining the continuity of recording. To be done. Specifically, by inserting a plurality of dot records linearly along the moving direction of the recording pen A between the dot recording position of measurement # 0 and the dot recording position of measurement # 30 in FIG. A recording result such as 12 (B) is obtained. However, in this case as well, the measurement results of measurement # 1 to measurement # 29 are not reflected in the trend record.

  Further, in order to reflect the measurement results of measurement # 1 to measurement # 29 in the trend recording, the maximum value of the measurement values between measurement # 0 in the previous recording cycle RA and measurement # 30 in the current recording cycle RB. The minimum value is obtained, and dot recording is inserted so as to perform linear interpolation between the maximum value and the minimum value, thereby obtaining a recording result as shown in FIG. As a result, the measurement results of measurement # 1 to measurement # 29 are also reflected in the trend record.

  However, when these conventional linear interpolation recording is performed, the input fluctuation is large, and it is necessary to record almost the full recording width from the vicinity of the recording position 0% to the vicinity of 100%, or the input is always changing. When dot recording that is several tens of mm long must be performed constantly, the number of times that the wire dot is driven is dramatically increased compared to conventional dot recording, and the life of the wire dot and the mechanism part is reduced due to wear and the like. It becomes shorter and the parts replacement cycle becomes faster.

  Further, as a result of increasing the number of times the wire dots are driven, the temperature inside the recorder may rise due to heat generated by the wire dot drive circuit and the like, which may adversely affect the measurement system and the like.

  The present invention pays attention to such a conventional problem, and its purpose is to suppress the number of times of driving the wire dots from increasing significantly even when the input fluctuation is large or the input constantly fluctuates. Accordingly, an object of the present invention is to provide a dot recorder that can always perform a stable linear interpolation recording operation.

The invention of claim 1 which achieves such a problem,
In a dot recorder configured to selectively drive a recording pen that reciprocates in the width direction of the recording paper at a linearly interpolated recording position in order to maintain continuity of dot recording,
A recording position thinning control unit for thinning out the recording position of linear interpolation based on the magnitude of the fluctuation of the measured value is provided.

The invention of claim 2 is the dot recorder according to claim 1,
The recording position thinning control unit is characterized in that the dot recording thinning interval is changed according to the difference between the maximum value and the minimum value of the measured values within the recording period.

The invention of claim 3 is the dot recorder according to claim 1,
The recording position thinning control unit is characterized in that the dot recording thinning interval is changed according to the difference between the previous measurement value and the current measurement value.

According to a fourth aspect of the present invention, in the dot recorder according to the first aspect, the recording position thinning control unit further includes:
Means for determining the number of dots recorded within a certain period of time;
Means for obtaining a moving average of the number of dot recordings within a continuous period of time;
Means for obtaining an average value of measured values within a recording period;
It is characterized by comprising means for selecting linear interpolation recording, linear interpolation recording position thinning processing or average value recording of measured values within a recording cycle based on the moving average value of the number of dot recordings.

The invention of claim 5 is the dot recorder according to claim 1, further comprising:
A recording pen maintenance control unit including means for obtaining the total number of dots recorded by the recording pen and means for displaying maintenance information according to the total number of dots recorded is provided.

  As a result, even when the input fluctuation is large or when the input constantly fluctuates, it is possible to suppress the number of times of driving the wire dots from significantly increasing.

  Hereinafter, the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the present invention, and the same reference numerals are given to portions common to FIG. In FIG. 1, in addition to the configuration of FIG. 8, a recording position thinning control unit 110 and a recording pen maintenance control unit 120 are provided.

  The recording position thinning control unit 110 thins out the recording position for linear interpolation based on the magnitude of the fluctuation of the measured value. As shown in FIG. 2, the recording position thinning control unit 110 includes a maximum value / minimum value difference calculation unit 111 that calculates the difference between the maximum value and the minimum value of the measurement value within the recording period, the previous measurement value, and the current measurement value. A measurement value difference calculation unit 112 that calculates a difference from the measurement value, and a dot recording thinning unit 113 that thins out dot recording so that the dot recording does not continue when the calculation result of the calculation unit exceeds a certain value.

  As shown in FIG. 3A, the recording position thinning control unit 110 configured in this way performs recording at a normal dot interval in the vicinity of both ends of the maximum value and the minimum value of the recording width, and sets the minimum value. In the direction from the center portion to the center portion, the dot interval is gradually widened to be the largest in the center portion, and in the direction from the center portion to the maximum value, the dot interval is gradually decreased. As shown in the drawing, control is performed so that the dot interval is uniformly widened over the entire recording width of the maximum value and the minimum value of the measured value.

  FIG. 4 is a flowchart showing the flow of the recording operation of FIG. First, for the measurement channel to be recorded, the magnitude relationship between the difference between the maximum value and the minimum value of the measurement value and a predetermined constant value is determined (SP1).

  When the difference between the maximum value and the minimum value is larger than a predetermined constant value, the wire dot ON / OFF data for each recording resolution (for example, 0.1 mm) corresponding to the recording position of the minimum value is turned ON (SP2). . Subsequently, a recording position is obtained by adding a predetermined increase value to the position of the wire dot ON (SP3). Here, the increment value is increased by 0.1 mm, for example, 0.5 mm at first, 0.6 mm next, and 0.7 mm next. Then, for the recording position to which the predetermined increment value is added, the magnitude relation between the position value and {(maximum value−minimum value) / 2} + minimum value is determined (SP4).

  If the position value is smaller than {(maximum value−minimum value) / 2} + minimum value, the wire dot ON / OFF data for each recording resolution corresponding to the recording position obtained by adding a predetermined value to the position of the wire dot ON. Is turned on (SP5). The processing from step SP3 to SP5 is repeatedly executed until the value of the recording position obtained by adding a predetermined value becomes larger than {(maximum value−minimum value) / 2} + minimum value.

  When the value of the recording position added with the predetermined value is larger than {(maximum value−minimum value) / 2} + minimum value, the wire dot ON / OFF data for each recording resolution corresponding to the recording position of the maximum value is turned ON. (SP6). Subsequently, a recording position is obtained by subtracting a predetermined value from the position of the wire dot ON (SP7). Here, it is assumed that the predetermined value is subtracted by, for example, 0.1 mm, for example, 0.5 mm at first, 0.6 mm next, and 0.7 mm next. Then, for the recording position obtained by subtracting the predetermined value, the magnitude relation between the position value and {(maximum value−minimum value) / 2} + minimum value is determined (SP8).

  If the value of the position is larger than {(maximum value−minimum value) / 2} + minimum value, wire dot ON / OFF data for each recording resolution corresponding to the recording position obtained by subtracting a predetermined value from the position of the wire dot ON. Is turned on (SP9). The processing from step SP7 to SP9 is repeated until the value of the recording position obtained by subtracting the predetermined value becomes smaller than {(maximum value−minimum value) / 2} + minimum value.

  The process of developing wire dot ON / OFF data for each recording resolution of the measurement channel to be recorded when the recording position value obtained by subtracting the predetermined value is smaller than {(maximum value−minimum value) / 2} + minimum value. Is completed (SP10).

  When the difference between the maximum value and the minimum value is smaller than a predetermined constant value, the wire dot ON / OFF data for each recording resolution (for example, 0.1 mm) corresponding to the recording position of the minimum value is turned ON (SP11). . Subsequently, a recording position is obtained by adding a predetermined value (for example, 0.5 mm) to the position of the wire dot ON (SP12). Then, for the recording position to which the predetermined value is added, the magnitude relationship between the position value and the maximum value is determined (SP13).

  If the value of the position is smaller than the maximum value, the wire dot ON / OFF data for each recording resolution corresponding to the recording position obtained by adding a predetermined value to the position of the wire dot ON is turned on (SP14). These processes from step SP12 to SP14 are repeated until the value of the recording position obtained by adding a predetermined value becomes larger than the maximum value.

  When the value of the recording position to which the predetermined value is added becomes larger than the maximum value, the wire dot ON / OFF data for each recording resolution corresponding to the recording position of the maximum value is turned ON (SP15), and the measurement channel to be recorded is recorded. The development processing of wire dot ON / OFF data for each resolution is completed (SP10).

  FIG. 5 is a flowchart showing the flow of the recording operation of FIG. First, for the measurement channel to be recorded, the magnitude relationship between the difference between the maximum value and the minimum value of the measurement value and a predetermined constant value is determined (SP1).

  When the difference between the maximum value and the minimum value is larger than a predetermined constant value, the wire dot ON / OFF data for each recording resolution corresponding to the recording position of the minimum value is turned ON (SP2). Subsequently, a recording position is obtained by adding a constant value (for example, 1.5 mm) having a larger interval than usual to the position of the wire dot ON (SP3). Then, for the recording position to which the constant value is added, the magnitude relation between the position value and the maximum value is determined (SP4).

  If the value of the position is smaller than the maximum value, the wire dot ON / OFF data for each recording resolution corresponding to the recording position obtained by adding a fixed value to the position of the wire dot ON is turned on (SP5). These processes from step SP3 to SP5 are repeated until the value of the recording position obtained by adding a certain value becomes larger than the maximum value.

  When the value of the recording position to which the constant value is added becomes larger than the maximum value, the wire dot ON / OFF data for each recording resolution corresponding to the recording position of the maximum value is turned ON (SP6), and the measurement channel to be recorded is recorded. The development process of wire dot ON / OFF data for each resolution is completed (SP7).

  When the difference between the maximum value and the minimum value is smaller than a predetermined constant value, the wire dot ON / OFF data for each recording resolution corresponding to the recording position of the minimum value is turned ON (SP8). Subsequently, a recording value is obtained by adding a predetermined value (for example, 0.5 mm) to the position of the wire dot ON (SP9). Then, for the recording position to which the predetermined value is added, the magnitude relationship between the position value and the maximum value is determined (SP10).

  If the value of the position is smaller than the maximum value, the wire dot ON / OFF data for each recording resolution corresponding to the recording position obtained by adding a predetermined value (for example, 0.5 mm) to the position of the wire dot ON is turned on (SP11). ). These processes from step SP9 to SP11 are repeatedly executed until the value of the recording position obtained by adding a predetermined value becomes larger than the maximum value.

  When the value of the recording position obtained by adding the predetermined value becomes larger than the maximum value, the process proceeds to step SP6, and the wire dot ON / OFF data development process for each recording resolution of the measurement channel to be recorded is completed (SP7). ).

  When performing linear interpolation recording, the recording position thinning control as shown in FIG. 3 based on the present invention is performed, so that the input fluctuation is large and recording is performed to almost the full recording width from the recording position near 0% to near 100%. Even when the input is constantly fluctuating or when it is necessary to perform dot recording of several tens of mm in length, wire dots are driven compared to conventional dot recording while maintaining recording quality It is possible to suppress a dramatic increase in the number of operations, and it is possible to improve that the life of the wire dot and the mechanism portion is shortened due to wear or the like and the component replacement cycle is accelerated.

  Further, since the increase in the number of times of driving the wire dots can be suppressed, the temperature rise inside the recorder due to the heat generated by the wire dot drive circuit and the like can be mitigated, and the possibility of adverse effects on the measurement system and the like can be reduced.

  FIG. 6 is a block diagram illustrating another configuration example of the recording position thinning control unit 110. The dot recording number counting unit 114 counts the number of times of wire dot driving for a certain time for each measurement channel. The dot recording number moving average calculating unit 115 calculates the moving average of the counting results of the dot recording number counting unit 114 for each measurement channel. The dot recording mode selection unit 116 selects an appropriate dot recording mode for each measurement channel based on the moving average value calculated by the dot recording number moving average calculation unit 115.

  The dot recording mode selection unit 116 sets a state where the moving average value is less than a certain value as a normal state, and linearly records a plurality of dot recordings between the maximum value and the minimum value of the measurement value within the recording period for each measurement channel. Perform the interpolation recording operation to be inserted. Then, when the moving average value of a certain measurement channel exceeds a certain value, switching from linear interpolation recording to average value recording is performed, or when the amplitude of the measurement value exceeds a certain value, switching to thinning processing as shown in FIG. When the moving average value becomes less than a certain value, the normal linear interpolation recording is resumed.

  FIG. 7 is a block diagram illustrating a configuration example of the recording pen maintenance control unit 120. The total dot recording number counting unit 121 counts the total number of wire dot driving times including trend recording and digital printing from the time of shipment to the present. The maintenance mode selection unit 122 is a maintenance information display unit provided on the operation panel for displaying a warning message for prompting maintenance when the total number of dots recorded exceeds a certain value that requires maintenance such as wire replacement or platen replacement. 123. When the maintenance is performed, the warning display is reset to prepare for the next maintenance warning.

  Further, when the total number of dot recordings exceeds a predetermined value at the next stage due to continuous use without maintenance, the maintenance mode selection unit 122 determines whether the measured value is between the maximum value and the minimum value within the recording cycle. The dot recording mode selection unit 116 is controlled so that the interpolation recording operation in which a plurality of dot recordings are linearly inserted is prohibited and only one dot is recorded in the measurement cycle as shown in FIG.

  By providing the recording pen maintenance control unit 120, it is possible to display a warning or the like with respect to the risk of failure due to life, so that attention can be urged before a failure occurs.

  The wire dot drive count may be displayed on the display screen or read from an external PC or the like via a communication network.

  Further, for the maintenance warning, a relay output or a communication output may be used.

  As described above, according to the present invention, even when the input fluctuation is large or the input constantly fluctuates, it is possible to suppress the number of times of driving the wire dots from being significantly increased while maintaining the recording quality. Therefore, it is possible to realize a dot recorder that can always perform a stable linear interpolation recording operation.

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It is a block diagram which shows one Example of this invention. FIG. 2 is a block diagram illustrating a specific example of a recording position thinning control unit 110 in FIG. 1. It is an example figure of the recording position thinning-out based on this invention. 4 is a flowchart showing a flow of a recording operation in FIG. 4 is a flowchart showing a flow of a recording operation in FIG. FIG. 7 is a block diagram illustrating another configuration example of the recording position thinning control unit 110 in FIG. 1. FIG. 2 is a block diagram illustrating a configuration example of a recording pen maintenance control unit 120 in FIG. 1. It is a conceptual block diagram which shows an example of the conventional dot type recorder. It is a principal part block diagram of the recording part of a dot recorder. It is a timing chart of dot recording. It is an operation sequence explanatory diagram of dot recording. It is explanatory drawing of a dot recording pattern.

Explanation of symbols

10 Measuring unit 20 RAM
30 Recording Pen Drive System 40 Recording Paper Drive System 43 Recording Paper 50 Setting Operation Unit 60 Display Unit 70 ROM
80 External memory 90 Communication interface 100 CPU
110 Recording position thinning control unit 120 Recording pen maintenance control unit

Claims (5)

In a dot recorder configured to selectively drive a recording pen that reciprocates in the width direction of the recording paper at a linearly interpolated recording position in order to maintain continuity of dot recording,
A dot-type recorder comprising a recording position thinning control unit for thinning out the recording position of linear interpolation based on the magnitude of fluctuation of a measured value.   2. A dot recorder according to claim 1, wherein the recording position thinning control unit changes a dot recording thinning interval in accordance with a difference between a maximum value and a minimum value of measured values within a recording cycle.   2. The dot recorder according to claim 1, wherein the recording position thinning control unit changes a dot recording thinning interval in accordance with a difference between a previous measurement value and a current measurement value. The recording position thinning control unit further includes:
Means for determining the number of dots recorded within a certain period of time;
Means for obtaining a moving average of the number of dot recordings within a continuous period of time;
Means for obtaining an average value of measured values within a recording period;
2. The dot shape according to claim 1, further comprising means for selecting linear interpolation recording, linear interpolation recording position thinning processing, or average value recording of measured values within a recording cycle based on a moving average value of dot recording numbers. Recorder. further,
2. The dot recorder according to claim 1, further comprising a recording pen maintenance control unit including means for obtaining the total number of dots recorded by the recording pen and means for displaying maintenance information according to the total number of dots recorded.

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