CN117021799A - Tension determining method of ribbon, printer and storage medium - Google Patents

Tension determining method of ribbon, printer and storage medium Download PDF

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Publication number
CN117021799A
CN117021799A CN202310996661.3A CN202310996661A CN117021799A CN 117021799 A CN117021799 A CN 117021799A CN 202310996661 A CN202310996661 A CN 202310996661A CN 117021799 A CN117021799 A CN 117021799A
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China
Prior art keywords
ribbon
illumination intensity
tension
determining
color
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CN202310996661.3A
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Chinese (zh)
Inventor
谢翟
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Shanghai Dikai Coding Industry Co ltd
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Shanghai Dikai Coding Industry Co ltd
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Priority to CN202310996661.3A priority Critical patent/CN117021799A/en
Publication of CN117021799A publication Critical patent/CN117021799A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J35/00—Other apparatus or arrangements associated with, or incorporated in, ink-ribbon mechanisms
    • B41J35/04—Ink-ribbon guides
    • B41J35/08—Ink-ribbon guides with tensioning arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
    • B41J29/38—Drives, motors, controls or automatic cut-off devices for the entire printing mechanism
    • B41J29/393—Devices for controlling or analysing the entire machine ; Controlling or analysing mechanical parameters involving printing of test patterns
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

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  • Impression-Transfer Materials And Handling Thereof (AREA)

Abstract

The invention discloses a tension determining method of a ribbon, a printer and a storage medium. The invention relates to the technical field of printers, which is applied to printers, and comprises the following steps: acquiring real-time illumination intensity based on an illumination sensor in the running process of the printer; determining whether the real-time illumination intensity is greater than or equal to a reference illumination intensity, wherein the reference illumination intensity is the illumination intensity of constant light emitted by a light source and passing through the ribbon when the ribbon is not stretched in a preparation state of the printer; if the real-time illumination intensity is greater than or equal to the reference illumination intensity, determining the tension of the ribbon according to the real-time illumination intensity and the reference illumination intensity. According to the technical scheme, the real-time illumination intensity is obtained in the operation process of the printer, when the real-time illumination intensity is larger than or equal to the reference illumination intensity, the tension of the ribbon is determined according to the real-time illumination intensity and the reference illumination intensity, the relaxation state of the ribbon is judged, and the non-contact high-precision tension measurement can be realized.

Description

Tension determining method of ribbon, printer and storage medium
Technical Field
The present invention relates to the field of printers, and in particular, to a method for determining tension of an ink ribbon, a printer, and a storage medium.
Background
With the development of thermal transfer printer technology, the requirement for printing accuracy is increasing.
At present, in the practical engineering application process of a printer, the radii of two color tape rolls of the printer are different, and the color tapes are often not consistent when being wound and unwound, so that two phenomena can occur: (1) The ribbon is elongated, so that the ribbon generates larger tension, further generates printing offset, reduces printing quality and even possibly breaks the ribbon; (2) ribbon slackening, which results in control of ribbon printing difficulties. Therefore, judging whether tension is generated in the ribbon or not and calculating the tension is an important means for improving the printing quality. However, the existing ribbon tension measurement technology based on the force sensor has the defects of difficult installation, easy influence of external interference and easy abrasion of the ribbon, so that the ribbon tension measurement technology is difficult to apply on a large scale.
Disclosure of Invention
The invention provides a tension determining method of a ribbon, a printer and a storage medium, which aim to judge the loose state of the ribbon of the printer by utilizing a constant light source and realize contactless and high-precision tension measurement.
According to an aspect of the present invention, there is provided a printer including a housing and a printing mechanism provided in the housing, characterized in that the printing mechanism includes: the device comprises a first stepping motor, a first color ribbon roll, a second stepping motor, a color ribbon, a printing head, a light source and an illuminance sensor; wherein,
the two ends of the ribbon are respectively wound on the first ribbon roll and the second ribbon roll; the first color belt rolls release the color belt under the drive of the first stepping motor, and the second color belt rolls recover the color belt under the drive of the second stepping motor;
the illuminance sensor and the light source are oppositely arranged and are respectively positioned at two sides of the color band; a light source for emitting constant light; an illuminance sensor for measuring an illuminance intensity of constant light passing through the color band;
the print head is disposed in contact with the ribbon for performing a printing operation.
Optionally, at least two spindles; the color ribbon is wound around each rotating shaft in turn.
Optionally, the number of the rotating shafts is 2; the contact position of the ribbon and the printing head is positioned between the two rotating shafts; the position of constant light emitted by the light source, which irradiates the color belt, is positioned between the two rotating shafts.
According to another aspect of the present invention, there is provided a tension determining method of an ink ribbon, applied to any printer, the method comprising:
acquiring real-time illumination intensity based on an illumination sensor in the running process of the printer;
determining whether the real-time illumination intensity is greater than or equal to a reference illumination intensity, wherein the reference illumination intensity is the illumination intensity of constant light emitted by a light source and passing through the ribbon when the ribbon is not stretched in a preparation state of the printer;
if the real-time illumination intensity is greater than or equal to the reference illumination intensity, determining the tension of the ribbon according to the real-time illumination intensity and the reference illumination intensity.
Optionally, determining the tension of the ribbon according to the real-time illumination intensity and the reference illumination intensity includes: determining an illumination ratio according to the real-time illumination intensity and the reference illumination intensity; and determining the tension of the ribbon according to the illumination ratio.
Optionally, determining the tension of the ribbon according to the illumination ratio includes: searching the tension of the color band in a tension-illumination ratio comparison table according to the illumination ratio; alternatively, constant parameters of the color band are determined; and determining the tension of the color ribbon according to the constant parameters and the illumination ratio.
Alternatively, the tension f=g·ln (l Δ ) The method comprises the steps of carrying out a first treatment on the surface of the Wherein g is a constant parameter, l Δ In order to be the light-to-light ratio,l 0 and l is the real-time illumination intensity.
Optionally, determining the constant parameter of the color band includes: obtaining basic parameters of the color band, wherein the basic parameters comprise width q, absorbance c of unit length, poisson ratio v and elastic modulus E; determining constant parameters of the color band based on the basic parameters
Optionally, determining the constant parameter of the color band includes: acquiring a first calibration illumination intensity and a second calibration illumination intensity of an illuminance sensor; wherein the first calibration illumination intensity is that constant light emitted by the light source passes through the ribbon when the ribbon is not stretched under the calibration state of the printerThe illumination intensity is the illumination intensity of constant light emitted by the light source and passing through the color ribbon when the printer is in a calibration state and the calibration tension is applied to the color ribbon; determining constant parameters of the color band according to the first calibration illumination intensity, the second calibration illumination intensity and the calibration tensionWherein (1)>For the nominal tension, l is the second nominal illumination intensity, < >>For a first nominal illumination intensity.
According to another aspect of the present invention there is provided a computer readable storage medium storing computer instructions for causing a processor to perform a method of determining tension of a ribbon according to any one of the embodiments of the present invention.
According to the technical scheme, during the operation process of the printer, the real-time illumination intensity is acquired based on the illumination sensor; determining whether the real-time illumination intensity is greater than or equal to a reference illumination intensity, wherein the reference illumination intensity is the illumination intensity of constant light emitted by a light source and passing through the ribbon when the ribbon is not stretched in a preparation state of the printer; if the real-time illumination intensity is greater than or equal to the reference illumination intensity, determining the tension of the ribbon according to the real-time illumination intensity and the reference illumination intensity. According to the technical scheme, the real-time illumination intensity is obtained in the operation process of the printer, when the real-time illumination intensity is larger than or equal to the reference illumination intensity, the tension of the ribbon is determined according to the real-time illumination intensity and the reference illumination intensity, the relaxation state of the ribbon is judged, and the non-contact high-precision tension measurement can be realized.
It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the invention or to delineate the scope of the invention. Other features of the present invention will become apparent from the description that follows.
Drawings
In order to more clearly illustrate the technical solutions of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of a printing structure according to a first embodiment;
FIG. 2 is a flowchart of a method for determining tension of an ink ribbon according to the second embodiment;
FIG. 3 is a flowchart of a method for determining tension of an ink ribbon according to the third embodiment;
FIG. 4 is a schematic view of a printing structure in a relaxed ribbon state according to the third embodiment;
fig. 5 is a cross-sectional view of a color ribbon provided in the third embodiment.
The attached drawings are identified: 1-printing mechanism 1, 10-first stepper motor, 11-first coil of tape, 12-second coil of tape, 13-second stepper motor, 14-ribbon, 15-printhead, 16-light source, 17-illuminance sensor, 18-stationary backplate, 19-stationary post and 20-pivot.
Detailed Description
In order that the manner in which the invention may be better understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Example 1
Fig. 1 is a schematic structural view of a printing structure according to a first embodiment, and the present embodiment is applicable to a tension determination situation of a printer. As shown in fig. 1, the printer includes: a housing and a printing mechanism disposed within the housing. The printing mechanism 1 includes: a first stepper motor 10, a first ribbon roll 11, a second ribbon roll 12, a second stepper motor 13, a ribbon 14, a printhead 15, a light source 16, and an illuminance sensor 17;
wherein, the two ends of the ribbon 14 are respectively wound on the first ribbon roll 11 and the second ribbon roll 12; the first ribbon roll 11 releases the ribbon 14 under the drive of the first stepping motor 10, and the second ribbon roll 12 recovers the ribbon 14 under the drive of the second stepping motor 13.
The printing mechanism 1 is an internal structure of a printer. The printing mechanism 1 includes a first stepping motor 10, a first ribbon roll 11, a second ribbon roll 12, a second stepping motor 13, a ribbon 14, a print head 15, a light source 16, and an illuminance sensor 17, and also includes a stationary back plate 18. The first color ribbon roll 11 is connected with a first stepping motor 10, the second color ribbon roll 12 is connected with a second stepping motor 13, and the first stepping motor 10 is a release stepping motor and is used for driving the first color ribbon roll 11 to release the color ribbon 14; the second stepping motor 13 is a recovery stepping motor for driving the second ribbon roll 12 to recover the ribbon 14. The first stepping motor 10, the second stepping motor 13, the print head 15, the light source 16, and the illuminance sensor 17 are all fixed on the fixed back plate 18 through fixing posts 19.
In one embodiment, the illuminance sensor 17 and the light source 16 are disposed opposite to each other and are respectively located on two sides of the ribbon 14; a light source 16 for emitting constant light; an illuminance sensor 17 for measuring the illumination intensity of the constant light passing through the color bar 14.
The constant temperature power and color temperature of the light source 16 may be, for example, a light emitting diode (Light Emitting Diode, led) lamp, a laser light source, or the like, which is not limited in this embodiment. The illuminance sensor 17 is used to measure the intensity of illumination passing through the color bar 14, and to display and output the measured intensity of illumination.
In one embodiment, the print head 15 is disposed in contact with the ink ribbon 14 for performing a printing operation.
Specifically, when the printer starts to operate, the first stepping motor 10 drives the first ribbon roll 11 to release the ribbon 14, then the ribbon 14 passes between the illuminance sensor 17 and the light source 16, printing is completed at the print head 15, and then the second ribbon roll 12 is driven by the second stepping motor 13 to recover the ribbon 14.
In a specific embodiment, the printing mechanism 1 in the housing further comprises at least two rotating shafts 20; the ribbon 14 is wound around each spool 20 in turn.
In one embodiment, the number of the rotating shafts 20 is 2; the contact position of the ribbon 14 and the print head 15 is located between the two spindles 20; the position where the constant light from the light source 16 impinges on the ribbon 14 is located between the two spindles 20.
Specifically, the first stepper motor 10 drives the first ribbon roll 11 to release the ribbon 14, then the ribbon 14 passes through the illuminance sensor 17 and the light source 16 around the rotation shaft 20, after printing is completed at the print head 15, the ribbon 14 is recovered by the second ribbon roll 12 driven by the second stepper motor 13 again around the rotation shaft 20.
This has the advantage of keeping the ribbon 14 normally released and retrieved by the spindle 20, improving the efficiency and security of printing while avoiding the ribbon 14 from becoming entangled with other components.
The technical scheme of the embodiment comprises the following steps of: a housing 0 and a printing mechanism 1 disposed within the housing 0. The printing mechanism 1 includes: a first stepper motor 10, a first ribbon roll 11, a second ribbon roll 12, a second stepper motor 13, a ribbon 14, a printhead 15, a light source 16, and an illuminance sensor 17; wherein, the two ends of the ribbon 14 are respectively wound on the first ribbon roll 11 and the second ribbon roll 12; the first ribbon roll 11 releases the ribbon 14 under the drive of the first stepping motor 10, and the second ribbon roll 12 recovers the ribbon 14 under the drive of the second stepping motor 13. The illuminance sensor 17 and the light source 16 are oppositely arranged and are respectively positioned at two sides of the color band 14; a light source 16 for emitting constant light; an illuminance sensor 17 for measuring the illumination intensity of the constant light passing through the color bar 14. The print head 15 is disposed in contact with the ink ribbon 14 for performing a printing operation. According to the technical scheme of the embodiment, the first ribbon roll 11 is driven by the first stepping motor 10 to release the ribbon 14, then the ribbon 14 passes through the illuminance sensor 17 and the light source 16 around the rotating shaft 19, after printing is completed at the printing head 15, the ribbon 14 is recovered by the second ribbon roll 12 driven by the second stepping motor 13. The illuminance sensor 17 and the light source 16 detect the illuminance intensity of the ribbon 14 in real time, so as to determine the tension of the ribbon 14, adjust the release speeds of the second stepping motor 13 and the first stepping motor 10, keep the ribbon 14 working normally, and improve the working safety of the printer.
Example two
Fig. 2 is a flowchart of a method for determining tension of an ink ribbon according to the second embodiment, and the present embodiment is applicable to a case of determining tension of a printer. The specific steps are shown in fig. 2, and the method comprises the following steps:
s201, acquiring real-time illumination intensity based on an illumination sensor in the printer operation process.
The illumination sensor is arranged in the printer and used for detecting illumination intensity, and the working principle is that the illumination intensity value is converted into a voltage value.
Specifically, in the printer operation process, the real-time illumination intensity of the color band is directly obtained based on the illumination sensor.
S202, determining whether the real-time illumination intensity is larger than or equal to the reference illumination intensity.
The reference illumination intensity is the illumination intensity of constant light emitted by the light source and passing through the ribbon when the ribbon is not stretched in a preparation state of the printer; the ready state is a state in which the printer can print.
Specifically, whether the acquired real-time illumination intensity is greater than or equal to the reference illumination intensity is determined, if the real-time illumination intensity is less than the reference illumination intensity, it is determined that the color band is not relaxed, and the execution is returned to S201; if the real-time illumination intensity is greater than or equal to the reference illumination intensity, S203 is performed.
S203, determining the tension of the ribbon according to the real-time illumination intensity and the reference illumination intensity.
Specifically, if the real-time illumination intensity is greater than or equal to the reference illumination intensity, the ribbon is determined to be relaxed, the ratio of the reference illumination intensity to the real-time illumination intensity is determined according to the real-time illumination intensity and the reference illumination intensity, and the tension of the ribbon is determined based on the ratio of the reference illumination intensity to the real-time illumination intensity.
Further, the ratio of the reference illumination intensity to the real-time illumination intensity is used for searching the tension of the ribbon in a tension-illumination ratio comparison table of a pre-established comparison relation of the tension of the ribbon and the illumination ratio; determining constant parameters according to the width q, the absorbance c of unit length, the poisson ratio v and the elastic modulus E, and determining the tension of the color band according to the constant parameters and the ratio of the reference illumination intensity to the real-time illumination intensity; and determining a constant parameter according to the illumination intensity of the constant light emitted by the light source when the ribbon is not stretched in the calibration state of the printer and the illumination intensity of the constant light emitted by the light source when the calibration tension is applied to the ribbon in the calibration state of the printer, and finally determining the tension of the ribbon according to the constant parameter and the ratio of the reference illumination intensity to the real-time illumination intensity.
The advantage of this is that by determining the tension of the ribbon, whether the ribbon is in a stretched or relaxed state, when it is determined that the ribbon is relaxed, the rotational speed of the first stepper motor can be reduced, or the rotational speed of the second stepper motor can be increased; when the ribbon is determined to be tensioned, the rotating speed of the first stepping motor can be increased or the rotating speed of the second stepping motor can be reduced, so that the ribbon is prevented from winding other components, and the working efficiency and the safety of the printer are improved.
According to the technical scheme, during the operation process of the printer, the real-time illumination intensity is acquired based on the illumination sensor; determining whether the real-time illumination intensity is greater than or equal to a reference illumination intensity, wherein the reference illumination intensity is the illumination intensity of constant light emitted by a light source and passing through the ribbon when the ribbon is not stretched in a preparation state of the printer; if the real-time illumination intensity is greater than or equal to the reference illumination intensity, determining the tension of the ribbon according to the real-time illumination intensity and the reference illumination intensity. According to the technical scheme, the real-time illumination intensity is obtained in the printer operation process, when the real-time illumination intensity is larger than or equal to the reference illumination intensity, the tension of the ribbon is determined according to the real-time illumination intensity and the reference illumination intensity, the relaxation state of the ribbon is judged, and the non-contact high-precision tension measurement can be realized.
Example III
Fig. 3 is a flowchart of a method for determining tension of an ink ribbon according to a third embodiment, and the present embodiment is applicable to a case of determining tension of a printer. Based on the above embodiment, the method further optimizes the determining the tension of the ribbon according to the real-time illumination intensity and the reference illumination intensity, and the specific steps are as shown in fig. 3, and the method includes:
s301, acquiring real-time illumination intensity based on an illumination sensor in the printer operation process.
Specifically, in the printer operation process, the real-time illumination intensity of the color band is directly obtained based on the illumination sensor.
S302, determining whether the real-time illumination intensity is greater than or equal to the reference illumination intensity.
The reference illumination intensity is the illumination intensity transmitted through the ribbon when the ribbon is not stretched or loosened just by turning on a light source installed in the printer before the printer operates in a printing preparation state of the printer.
Specifically, whether the acquired real-time illumination intensity is greater than or equal to the reference illumination intensity is determined, if the real-time illumination intensity is less than the reference illumination intensity, it is determined that the color band is not relaxed, and the execution is returned to S301; if the real-time illumination intensity is greater than or equal to the reference illumination intensity, S303 is performed.
S303, determining the illumination ratio according to the real-time illumination intensity and the reference illumination intensity.
Wherein, the ratio of the illumination to the reference illumination intensity to the real-time illumination intensity.
Specifically, if the real-time illumination intensity is greater than or equal to the reference illumination intensity, determining the illumination ratio according to the ratio of the real-time illumination intensity to the reference illumination intensity.
S304, determining the tension of the color ribbon according to the illumination ratio.
In one embodiment, determining the tension of the ribbon based on the illumination ratio comprises: and searching the tension of the color band in a tension-to-illumination ratio comparison table according to the illumination ratio.
The tension and illumination ratio comparison table is a pre-established comparison relation of the tension and the illumination ratio of the color band, and the specific comparison relation of the tension and the illumination ratio comparison table depends on the model of the color band and is irrelevant to a constant light source. After one-time calibration is completed for a certain type of color band, a tension and illumination ratio comparison table can be directly obtained.
Specifically, after the illumination ratio is determined, the tension of the color ribbon is directly searched and determined in a tension-illumination ratio comparison table according to the illumination ratio.
In one embodiment, determining the tension of the ribbon based on the illumination ratio comprises: determining a constant parameter of the color band; and determining the tension of the color ribbon according to the constant parameters and the illumination ratio.
In one embodiment, determining the constant parameter of the ribbon includes: obtaining basic parameters of the color band; determining constant parameters of the color band based on the basic parameters
Wherein the basic parameters include width q, absorbance per unit length c, poisson's ratio v and elastic modulus E
Specifically, the constant parameter is
In one embodiment, determining the constant parameter of the ribbon includes: acquiring a first calibration illumination intensity and a second calibration illumination intensity of an illuminance sensor; determining constant parameters of the color band according to the first calibration illumination intensity, the second calibration illumination intensity and the calibration tension
The first calibration illumination intensity is the illumination intensity of constant light emitted by the light source and passing through the ribbon when the ribbon is not stretched under the calibration state of the printer, and the second calibration illumination intensity is the illumination intensity of constant light emitted by the light source and passing through the ribbon when the calibration tension is applied to the ribbon under the calibration state of the printer.
Wherein,for calibrating tension +.>For the second nominal illumination intensity, < >>For a first nominal illumination intensity.
Specifically, by acquiring the first calibration illumination intensity and the second calibration illumination intensity of the illuminance sensor, the constant parameters of the color band are determined according to the first calibration illumination intensity and the second calibration illumination intensity of the illuminance sensor and the calibration tension.
Specifically, the tension f=g·ln (l Δ ) The method comprises the steps of carrying out a first treatment on the surface of the Wherein g is a constant parameter, l Δ In order to be the light-to-light ratio,l 0 and l is the real-time illumination intensity.
In the above embodimentBased on the example, consider first that when the ribbon is just tension-free and not relaxed, the angle between the light source and the ribbon normal vector is 0, the ribbon reflectivity is at a minimum because of the zero angle, and the minimum surface reflectivity is denoted as b 0 . The reference illumination intensity obtained by the illuminance sensor is due to the reflection of the surface of the color band and the absorption of the color band materialWherein r is the illumination intensity received by the illuminance sensor when no color band exists between the illuminance sensor and the light source, a0 is the total absorbance of the ribbon without tension. Total absorbance of color band a 0 ＝cp 0 . Thus, the reference illumination intensity is determined +.>
Considering the relaxed state of the ribbon, fig. 4 is a schematic structural diagram of a printing structure in the relaxed state of the ribbon according to the third embodiment, as shown in fig. 4, an angle θ is generated based on the light and the normal vector of the ribbon, so that the ribbon has a stronger reflection phenomenon, and the reflectivity is denoted as b > b 0 The sensor obtains real-time illumination intensitySince b > b 0 The real-time illumination intensity l under the relaxation of the color band is smaller than the reference illumination intensity l under the critical state 0 . Considering that tension exists, the ribbon is stretched due to tension, and when the normal vector included angle of the light and the ribbon is 0, the l=e is determined -cp (1-b 0 ) r. Based on l=e -cp (1-b 0 ) r and->Determination of p 0 -p＝ln(l/l 0 ) /c, wherein p=p 0 (1+ε z ) Thereby determining ln (l/l 0 )/c＝-p 0 ε z . Wherein ε z Is the strain of the vertical z direction line of the color band;
FIG. 5 is a real worldA cross-sectional view of the ribbon provided in the third embodiment, as shown in fig. 5, shows the strain of the ribbon in the x, y and z directions, the width q of the ribbon, and the absorbance p of the ribbon. Since the ribbon is in the elastic range, the axial line strain and the transverse line strain of the ribbon are epsilon z ＝-υε x Relation of epsilon x For axial x-direction line strain, ε is z ＝-υε x Substitution of ln (l/l) 0 )/c＝-p 0 ε z Determination of ln (l/l) 0 )/c＝p 0 υε x . Based on stress-strain sigma x ＝Eε x Substitution of ln (l/l) 0 )/c＝p 0 υε x Determination of ln (l/l) 0 )/c＝p 0 υσ x /E, further based on stress sigma x ＝f/(p 0 q) determining tension
Further, by introducing constant parametersAnd light ratio->Thereby determining the tension f=g·ln (l) of the ribbon Δ )。
According to the technical scheme, the real-time illumination intensity is obtained based on the illuminance sensor in the running process of the printer; determining whether the real-time illumination intensity is greater than or equal to a reference illumination intensity, wherein the reference illumination intensity is the illumination intensity of constant light emitted by a light source and passing through the ribbon when the ribbon is not stretched in a preparation state of the printer; if the real-time illumination intensity is greater than or equal to the reference illumination intensity, determining an illumination ratio according to the real-time illumination intensity and the reference illumination intensity, and determining the tension of the color ribbon according to the illumination ratio. According to the technical scheme, the real-time illumination intensity is obtained in the operation process of the printer, when the real-time illumination intensity is larger than or equal to the reference illumination intensity, the illumination ratio is determined according to the real-time illumination intensity and the reference illumination intensity, the tension of the ribbon is finally determined according to the illumination ratio, the relaxation state of the ribbon is judged based on the determined tension of the ribbon, the ribbon is timely adjusted according to the relaxation condition of the ribbon, the ribbon is prevented from being wound with other components, and the non-contact high-precision tension measurement can be realized.
Example IV
The fourth embodiment also provides a storage medium containing computer-executable instructions, which when executed by a computer processor, are used to perform a method of determining tension of a ribbon, applied to any printer; the method comprises the following steps:
acquiring real-time illumination intensity based on an illumination sensor in the running process of the printer;
determining whether the real-time illumination intensity is greater than or equal to a reference illumination intensity, wherein the reference illumination intensity is the illumination intensity of constant light emitted by a light source and passing through the ribbon when the ribbon is not stretched in a preparation state of the printer;
if the real-time illumination intensity is greater than or equal to the reference illumination intensity, determining the tension of the ribbon according to the real-time illumination intensity and the reference illumination intensity.
Of course, the storage medium containing the computer executable instructions provided in the embodiments of the present invention is not limited to the above method operations, but may also perform the related operations in determining the tension of the ribbon provided in any embodiment of the present invention.
From the above description of embodiments, it will be clear to a person skilled in the art that the present invention may be implemented by means of software and necessary general purpose hardware, but of course also by means of hardware, although in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as a floppy disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a FLASH Memory (FLASH), a hard disk or an optical disk of a computer, etc., including several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to execute the method of the embodiments of the present invention.
The above embodiments do not limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of the present invention.

Claims (10)

1. A printer comprising a housing and a printing mechanism disposed within the housing, the printing mechanism comprising: the device comprises a first stepping motor, a first color ribbon roll, a second stepping motor, a color ribbon, a printing head, a light source and an illuminance sensor; wherein,
the two ends of the ribbon are respectively wound on the first ribbon roll and the second ribbon roll; the first color ribbon roll releases the color ribbon under the drive of the first stepping motor, and the second color ribbon roll recovers the color ribbon under the drive of the second stepping motor;
the illuminance sensor and the light source are oppositely arranged and are respectively positioned at two sides of the color band; the light source is used for emitting constant light; the illuminance sensor is used for measuring the illumination intensity of the constant light passing through the color band;
the print head is disposed in contact with the ribbon for performing a printing operation.
2. The printer of claim 1, further comprising: at least two rotating shafts; the color ribbon sequentially winds each rotating shaft.
3. The printer according to claim 2, wherein the number of the rotating shafts is 2;
the contact position of the ribbon and the printing head is positioned between the two rotating shafts;
the position of the constant light emitted by the light source, which is irradiated on the color belt, is positioned between the two rotating shafts.
4. A method of determining tension of a ribbon, applied to a printer as claimed in any one of claims 1 to 3; the method comprises the following steps:
acquiring real-time illumination intensity based on an illumination sensor in the running process of the printer;
determining whether the real-time illumination intensity is greater than or equal to a reference illumination intensity, wherein the reference illumination intensity is the illumination intensity of constant light emitted by a light source and passing through a color ribbon when the color ribbon is not stretched in a preparation state of the printer;
and if the real-time illumination intensity is greater than or equal to the reference illumination intensity, determining the tension of the color ribbon according to the real-time illumination intensity and the reference illumination intensity.
5. The method of claim 4, wherein determining the tension of the ribbon based on the real-time illumination intensity and the reference illumination intensity comprises:
determining an illumination ratio according to the real-time illumination intensity and the reference illumination intensity;
and determining the tension of the color ribbon according to the illumination ratio.
6. The method of claim 5, wherein determining the tension of the ribbon based on the illumination ratio comprises:
searching the tension of the color band in a tension-to-illumination ratio comparison table according to the illumination ratio;
or,
determining a constant parameter of the ribbon;
and determining the tension of the color band according to the constant parameter and the illumination ratio.
7. The tension determination of the ribbon of claim 6The method is characterized in that the tension f=g.ln (l Δ ) The method comprises the steps of carrying out a first treatment on the surface of the Wherein g is the constant parameter, l Δ For the light ratio of the light to be emitted,l 0 and l is the real-time illumination intensity.
8. The method of claim 6, wherein determining the constant parameter of the ribbon comprises:
obtaining basic parameters of the color band, wherein the basic parameters comprise width q, absorbance c in unit length, poisson ratio v and elastic modulus E;
determining a constant parameter of the color band according to the basic parameter
9. The method of claim 6, wherein determining the constant parameter of the ribbon comprises:
acquiring a first calibration illumination intensity and a second calibration illumination intensity of the illuminance sensor; the first calibration illumination intensity is the illumination intensity of constant light emitted by the light source and passing through the color ribbon when the color ribbon is not stretched under the calibration state of the printer, and the second calibration illumination intensity is the illumination intensity of constant light emitted by the light source and passing through the color ribbon when the calibration tension is applied to the color ribbon under the calibration state of the printer;
determining constant parameters of the color band according to the first calibration illumination intensity, the second calibration illumination intensity and the calibration tensionWherein (1)>For the nominal tension, +.>For said second nominal illumination intensity, +.>And calibrating the illumination intensity for the first light source.
10. A computer readable storage medium storing computer instructions for causing a processor to perform the method of determining the tension of a ribbon as claimed in any one of claims 4 to 9.
CN202310996661.3A 2023-08-08 2023-08-08 Tension determining method of ribbon, printer and storage medium Pending CN117021799A (en)

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CN202310996661.3A CN117021799A (en) 2023-08-08 2023-08-08 Tension determining method of ribbon, printer and storage medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310996661.3A CN117021799A (en) 2023-08-08 2023-08-08 Tension determining method of ribbon, printer and storage medium

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