• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a method for tracking the yarn quality in an optical yarn quality scanner by means of an optical line sensor having one or two rows of the individual optical elements of a rectangular shape, which provide at its output an analog signal which is proportional to the degree of their irradiation. The analog signals from all individual optical elements illuminated by a radiation source and not shaded by the yarn are scanned in all the modes of optical quality scanner operation for each individual optical element and stored in electronic memory as output values, operating values or operating values ( Fc1, Fc2, Fc3) of the individual optical elements, which are subsequently compared with the aim of assessing the correct function of the sensor and eliminating the production and operating defects and production and operational disturbances. The invention also relates to an optical scanner for carrying out the above-mentioned method, in which the electronic memories (1) and their associated circuits for eliminating the production tolerances and malfunctions and defects and circuits for calculating the widths of the partial shadows for individual optical elements of Sensors of the optical scanner are formed on a common semiconductor substrate, which is arranged in the optical scanner.
    公开号:CH710572A2
    申请号:CH01830/15
    申请日:2015-12-14
    公开日:2016-06-30
    发明作者:Kousalik Pavel；Beran Zdenek
    申请人:Rieter Cz Sro；
    IPC主号:
    专利说明:

    Field of technology
    The invention relates to the method for tracking the yarn quality in an optical yarn quality scanner with the help of an optical line sensor which has one or two rows of the individual optical elements of a rectangular shape, which provide an analog signal at their output that is proportional to the degree of their irradiation is.
    The invention also relates to an optical scanner for carrying out the inventive method, which has a sensor with a plurality of optical elements that are in one or two rows for tracking the parameters of the moving yarn on the textile machines with the help of a perpendicular projection of the Yarn on individual optical elements of the sensor are arranged side by side by means of a single radiation source.
    State of the art
    The optical yarn quality scanners are used on the textile machines in yarn production and their protection from contamination by dust or yarn residues is basically impossible, and therefore it is essential to clean the optical scanners. The moving yarn passes through the scanner evaluating the quality of the spun yarn, from which dust and / or fiber parts are released that adhere to the surface of the individual optical elements of the sensor of the optical scanner and its ability to react to the radiation from deteriorate the source.
    [0004] The basic requirement for textile machines at present is maximum effectiveness and minimum downtime. Therefore efforts are made to extend the maintenance-free operating time to the maximum and to clean the respective scanner as little as possible.
    Another negative phenomenon of the optical scanner is the aging of the radiation source over time, which means in the change in luminosity and thereby also in the change in the value of the analog output signal of the optical element.
    In the classic optical yarn quality scanner, the optical yarn cross-section is measured in such a way that the amount of light is measured that falls on the respective optical receiver, which is influenced by the yarn passage through the measurement gap. The respective light is received from the transmitter by two optical receivers, in the first the light passes through yarn and in the other directly, as shown in FIG. By calibrating the scanner so that the yarn receiver and the reference receiver provide the same analog output values, and by subsequently switching these receivers into the bridge, one achieves the compensation of the different sensitivities of the optical receivers. Switching on the bridge should also automatically compensate for minor changes in light intensity caused by aging of the source, since the output values of both optical receivers should be changed equally.
    In contrast to the classic optical quality scanner, when a photodiode is used as the receiving element, for example, and the output is an analog value, the optical line sensor has one or two rows of the individual optical elements, with the output from each optical Element is an analog value.
    CZ 304 683 describes, for example, the method of tracking at least one parameter of the yarn quality and / or the parameters of the sensor by an electronic cleaner with the aid of an optical scanner having a sensor with one or two rows of the optical elements of a rectangular shape which provide an analog signal at their output that is proportional to the intensity of their irradiation, the magnitude of which is tracked in each measurement cycle. In the first and / or second row of optical elements, an active zone is formed to track a specific yarn parameter and / or sensor parameter, which zone is formed by selected optical elements of the respective sensor, which form a coherent row or separate groups. The active zone includes a lower number of optical elements in the respective row than is the case overall in the respective row and only the output signal of the optical elements of the respective active zone is included in the evaluation of the respective parameter. When tracking the scanner parameters, the active zones for determining the contamination of the optical elements by dust and / or for tracking the influence of external lighting and / or aging of the sources are formed, but these active zones cannot be used to track individual optical elements independently, because they can have a different sensitivity and for the same energy of the incident light they can generate different analog values.
    CZ 304 758 describes the method of tracking yarn quality by an electronic yarn clearer with the aid of an optical scanner comprising a sensor with one or two rows of the optical elements of a rectangular shape with an analog output, each of which has a photodiode and an amplifier of its output signal, which has a variable / adjustable gain, the size of which changes according to the required sensitivity of the respective optical element. The size of the output signal of the optical elements is thus maintained in the vicinity of the center of the working area of the connected analog-digital converter and the optimal setting is when, with the maximum working illumination of the optical element, its output signal is just below the saturation of the analog-digital converter , whereby one achieves the maximum dynamics of the output signal and thus also the greatest resolution. This system does not even take into account the different sensitivity of the individual optical elements, both directly from production and during operation.
    From CZ 304 682 an optical CMOS scanner is known which has a plurality of the optical elements for the device for determining the parameters of the moving yarn with the aid of its projection onto the optical elements of the sensor. The optical elements of the sensor are arranged in two rows perpendicular to the direction of yarn movement and each optical element has a rectangular shape and an analog signal is present at its output. Optical elements of the first row are oriented with their longer sides in the direction of yarn movement and the optical elements of the second row are oriented with their longer sides perpendicular to the direction of yarn movement. The optical elements of both rows can be arranged on a common semiconductor substrate together with analog-digital converters corresponding to them, the outputs of which are coupled to the input of the programmable device of the optical scanner, which is arranged on the same semiconductor substrate. The scanner mentioned does not solve the different sensitivity of the individual optical elements, both directly from production and during operation.
    The disadvantage of the solutions described above is that the individual optical elements can have different sensitivity and can generate different analog values for the same energy of the falling light. This negative phenomenon must also be compensated for. In the case of the solution with a larger number of optical elements, calibration and switching into the bridge similar to that of the classic optical scanners simply cannot be implemented and another solution has to be found, which is the subject of the invention.
    Explain the essence of the invention
    The aim of the invention is achieved by the inventive method for tracking the yarn quality, the essence of which is that the analog signals from all individual optical elements that are illuminated by a radiation source and are not shaded by the yarn, in all regimes of the optical quality scanner can be scanned for each individual optical element and, according to the criteria defined in advance, are stored in an electronic memory as output values, operating values or working values of the individual optical elements, which are then compared with the aim of assessing the correct function of the respective sensor and to eliminate production and operational defects and production and operational disruptions.
    The values are stored several times and at different times for each individual optical element for each of the specified criteria.
    From the operationally lit, not soiled and not shaded optical sensor, the output values are stored for all individual optical elements during the production of the scanner or after the completion of this production or before installation on the machine or before the first recording of the evaluation of the yarn quality .
    Before the first recording of the evaluation of the yarn quality and also during the operation of the optical scanner without the yarn, so with each interruption of the spinning process, the operating values of all the individual optical elements are stored from the illuminated and not shaded optical sensor, after which the comparison the output values and operating values, long-term changes in the parameters and / or defects or faults in the optical scanner are detected.
    After the operating values have been stored, the current value of the analog signal is compared with the operating value to evaluate the size of the partial shadow of each individual at least partially shaded optical element, whereby the long-term changes in the parameters of the optical scanner, i.e. Dusting of the optical elements or aging of the light source can be eliminated.
    During the evaluation of the yarn quality, the working values of the respective optical elements are stored from each currently illuminated optical element of the optical sensor that is not shaded by the yarn.
    After the work values have been stored, the current value of the analog signal on the optical elements for which a work value has been stored with the stored work value and on the other optical element is used to evaluate the size of the partial shadow of each individual at least partially shaded optical element Elements compared with the operating value, whereby the changes in the parameters of the optical scanner due to dusting during the evaluation of the yarn quality are eliminated.
    The working values of the individual optical elements and the size of the shading of the individual optical elements are stored in a mutual and adjustable time synchronization that is controlled by the source of the control signals.
    The essence of the inventive optical line scanner is that the electronic memory and their associated circuits for eliminating the manufacturing tolerances and the malfunctions and defects and circuits for calculating the widths of the partial shadows for individual optical elements of the sensor of the optical scanner on a common Semiconductor substrate are formed, which is arranged in the optical scanner.
    These are circuits for recording the output values and circuits for recording the operating values and circuits for recording the operating values for individual optical elements of the sensor of the optical scanner and circuits for calculating the widths of the partial shadows including the calculation of the correction values, which an integrated Compensation for manufacturing and operating defects and manufacturing and operating faults, as is the case, for example, with soiling of the scanner, aging of the radiation source and the different sensitivity of the individual optical elements.
    Explanation of the drawings
    To explain the invention, the drawings are used, which show: Fig. 1 Scheme of a classic optical yarn quality scanner according to the prior art, Fig. 2 difference in the analog signal of the individual unsaturated, fully illuminated optical element that is not shaded by yarn (left) and the optical element that is partially shaded by yarn (right), Fig. 3 Size of the analog signal for a single fully illuminated optical element that is not shaded by yarn and is not soiled (left) and the same optical element, fully illuminated , not shaded by yarn, but partially soiled (right), Fig. 4 Size of the analog signal of the individual optical element that is partially shaded by yarn and not soiled (left) and the same optical element, partially shaded and partially soiled by yarn , Fig. 5 circuit diagram for integrated compensation of the scanner soiling, aging d he radiation source and the different sensitivity of the individual optical elements and FIG. 6 analog values of the individual optical elements of an optical two-line scanner during the measurement.
    Embodiments of the invention
    In Fig. 2, a non-saturated and fully illuminated optical element is shown, wherein the black color corresponds to the amount of energy that falls on the respective optical element. With regard to the fact that it is an optical element with an analog output, this optical element must not be saturated even with the maximum light intensity of the radiation source. M is the maximum value of the analog signal that the respective optical element can provide at its output, provided that this would be illuminated with so strong light that it would be in so-called saturation. Fv is the resultant value of the analog signal that is provided by the individual fully illuminated optical element that is not shaded by the yarn. The figure on the right shows the same optical element that is partially shaded by the yarn, where Fp is the output value of the analog signal in the case of partial yarn shading. The decrease in energy caused by partial shading of the optical element by the yarn results from the difference Fv-Fp.
    However, it must be taken into account that the individual optical elements are not the same and can have different sensitivity values, and the incident energy does not have to be identical for all optical elements. The values Fv and Fp are therefore also different for individual optical elements and these differences must be compensated for for correct measurement.
    If we choose M as a reference value instead of Fv from FIG. 2 as a reference value for individual optical elements, we would commit a significant error and the measurement would be inaccurate. For this reason, each optical element must be calibrated in advance, i.e. a reference value Fv must be established for each optical element, which is a resulting value of the analog signal of the fully illuminated optical element. The output, operating or working value (Fc1, Fc2, Fc3) can be used as a reference value Fv.
    The decrease in energy that is caused by partial shading of the optical element by yarn results from the difference Fv-Fp. When determining the size of the shading, however, it is not the absolute, but the relative energy decrease AR of each optical element that is of interest. The following applies to a single optical element:
    As far as the width of the optical element is H, you can then determine the width of the partial shadow of the yarn Di of the respective optical element according to the following formula:
    We then determine the total size of the yarn shadow as a sum of all partial shadows from completely or partially shaded optical elements:
    In Fig. 3, analog values of the same optical element are shown, which is fully illuminated by the light source and is not shaded by the yarn, the left analog output value Fv is shown for unpolluted optical element and right the analog output value Fvz for partially dirty optical element is shown, which is smaller, because as a result of the dust, there has been a reduction in the light energy falling on the respective optical element. If this value is not compensated, this decrease in energy would mean an inadequate evaluation of the partial shadow of the yarn in front of this optical element.
    The same case is shown in FIG. 4, but the optical element is also shaded by the yarn. The analog output value Fp for a partially shaded and clean optical element is shown on the left, and the analog output value Fpz for a partially shaded and partially soiled optical element is shown on the right.
    The decrease in energy, caused by partial yarn shading on a clean, non-soiled optical element, results from the difference Fv-Fp and on the soiled optical element from the difference Fvz-Fpz. The absolute difference between the energies for clean and dirty optical elements is not the same, for the relative decrease the following applies:
    And for the width of the partial shadow applies:
    Insofar as we use Fv instead of Fyz as a reference value for the partially soiled optical element, we commit a major error and the evaluated width of the partial shadow would be greater than the fact.
    Even the optical elements not shaded by the yarn but soiled would have a certain width of the partial shadow and would burden the respective measurement with an error.
    As far as we measure according to the criteria defined in advance and store the analog output value (Fc1, Fc2, Fc3) in the memory for each individual optical element illuminated by the light source and not shaded by the yarn, we can use this as a reference value Use Fv to determine the size of the shading of the optical element. If the analog output value is recorded for a certain period, the maximum value for this period is saved as the output value, i.e. Fc = MAX (Fc).
    The calculation of the width of the partial shadow is determined by the following formula and circuit diagram, shown in FIG. 5.
    where Fv is the stored reference value, Fp is the current measured value, H is the width of the optical element. As a reference value Fv one can use the starting value (Fc1), operating value (Fc2) or work value (Fc3) according to the defined criteria.
    According to the circuit diagram in FIG. 5, the reference value Fv is stored in a memory location i. The respective reference value Fv is fed from memory location 1 to a differential element 2 in which it is compared with the current measured value Fp. The resulting value from the difference element 2 is fed into a multiplier 3, in which it is multiplied by the width H of the corresponding optical element. The resulting value is fed from the multiplier 3 into a divider 4, in which it is divided by the reference value Fv from memory location 1. The result is the width of the partial shadow Di.
    The integrated compensation of the scanner soiling, the aging of the radiation source and the different sensitivity of the optical elements results from the points in time and according to which criteria the values Fc1, Fc2 or Fc3 are scanned, recorded and stored in the reference value Fv.
    An important value is the output value Fc1 which is recorded and stored in the scanner for each optical element in the production process of the scanner. By using this value in the above formula, different sensitivities of the optical elements, inhomogeneities in the radiation falling on the sensor, production tolerances, etc. are eliminated. The output values can also be stored in the scanner later, for example when the scanner is installed on the machine, at the latest, however, before the first recording of the yarn production on the respective work site where the scanner is attached.
    Another value is the operating value Fc2, which is recorded and stored in the scanner for all optical elements during operation, however, at the times defined in advance. It is mainly the time when the sensor is not shaded by the yarn and does not evaluate the yarn defects, e.g. after a yarn break. By using the operating value Fc2 (Fv = Fc2), long-term changes, e.g. Compensate for radiation source aging, slow pollution, etc.
    By comparing the output values Fc1 and the operating values Fc2, it is also possible to determine the functionality of the scanner and the degree of these changes and possibly to report the defect in the scanner. By comparing the changes in the output values Fc1 and the operating values Fc2, it is also possible to distinguish the type of change.
    In most cases, the aging of the light source is expressed by a uniform reduction in the operating values Fc2 compared to the output values Fc1 of all optical elements and, on the contrary, due to its inhomogeneity on the individual optical elements of the respective sensor, the soiling is uneven Reduction of the operating values Fc2 compared to the output values Fc1.
    The spread of the values ΔFci of the individual optical elements is low in the case of aging of the source and high in the case of contamination.
    The further reference value is the working value Fc3, which is recorded and stored in the scanner during operation, namely in the time when the scanner evaluates the yarn quality, that is, when the respective sensor is shaded by the yarn. In this mode, the work values Fc3 are calculated periodically or once from the illuminated optical elements that are not shaded by the yarn. So as far as the yarn goes through the scanner, only those optical elements are compensated again (Fv = Fc3) on which the image of the yarn is not, and after the break all optical elements are again automatically compensated.
    For this purpose, two rows of the optical elements are advantageously used. In the configuration where the optical elements of the first row are narrower one can choose the position and width of the yarn, i. Determine shaded and unshaded elements relatively clearly. From this and from the known sensor configuration, it is possible to determine which optical elements are or were influenced by the yarn shadow in the measured period and for which optical elements the operating value Fc3 is to be stored.
    The compensation mode of the scanner can function, for example, so that in the time when the sensor is not shaded by the yarn, e.g. after a yarn break and the yarn deficiency is not evaluated, the operating value Fc2 is recorded and stored, which is then stored in memory location 1 as a reference value Fv (Fv = Fc2). From this point on, the respective scanner is compensated for by operating values Fc2. During the time when the scanner evaluates the yarn quality, that is, when the sensor is shaded by the respective yarn, the working values Fc3 are read from the illuminated optical elements that are not shaded by the yarn, which are stored in memory locations 1 as reference values Fv of respective optical elements (Fv = Fc3) are then stored. In the case of the optical elements that are completely or partially shaded by the yarn, the last operating value Fc2 is then used as the reference value Fv.
    Industrial applicability
    The method according to the invention and the optical line scanner according to the invention can be used to track the yarn quality or the quality of another linear textile structure on the textile machines.
    权利要求:
    Claims (9)
    [1]
    A method of tracking the yarn quality in an optical yarn quality scanner by means of an optical line sensor comprising one or two rows of the individual optical elements of a rectangular shape, which at its output provide an analogue signal proportional to the degree of their irradiation, characterized the analogue signals from all individual optical elements illuminated by a radiation source and not shaded by the yarn are scanned in all optical quality scanner regimes for each individual optical element and stored in electronic memory as output values (Fc1), operating values (Fc2 ) or working values (Fc3) of the individual optical elements are stored.
    [2]
    A method as claimed in claim 1, characterized in that the output values (Fc1) for each individual optical element are obtained from a powered, non-soiled and unshaded optical sensor in the manufacture of the scanner or after completion of that fabrication or prior to installation on the machine or stored before the first recording of the evaluation of the yarn quality.
    [3]
    Method according to claim 1, characterized in that the operating values (Fc2) are stored for each individual optically illuminated optical element before the first recording of the evaluation of the yarn quality and furthermore after the first recording of the tracking of the yarn quality at each interruption of the spinning process.
    [4]
    4. The method according to claim 3, characterized in that after the storage of the operating values (Fc2) by their comparison with the output values (Fc1) long-term changes of the parameters and / or defects or disturbances of the optical scanner are detected.
    [5]
    5. The method according to claim 3, characterized in that after storing the operating values (Fc2) for evaluating the size of the partial shadow of each individual at least partially shaded optical element, the current value (Fp) of the analog signal compared with the operating value (Fc2) which eliminates long-term changes in the parameters of the optical pickup.
    [6]
    6. The method according to claim 5, characterized in that during the evaluation of the yarn quality from each currently fully illuminated and not shadowed by the yarn optical element of the optical sensor work values (Fc3) are stored.
    [7]
    7. The method according to claim 6, characterized in that after the storage of the working values (Fc3) on the respective optical elements by their comparison with the operating values (Fc2), the changes of the parameters and / or defects or disturbances of the optical scanner are detected.
    [8]
    8. The method according to claim 6, characterized in that after the storage of the working values (Fc3) for evaluating the size of the partial shadow of each individual at least partially shaded optical element, the current value (Fp) of the analog signal on the optical elements, for the work value (Fc3) has been stored, compared with the stored work value (Fc3) and on other optical elements with the operating value (Fc2), whereby the changes in the parameters of the optical scanner during the evaluation of the yarn quality are eliminated.
    [9]
    An optical scanner comprising a sensor having a plurality of optical elements juxtaposed in one or two rows for tracking the parameters of the moving yarn on the textile machines by means of perpendicular projection of the yarn onto individual optical elements of the sensor by means of a single radiation source for carrying out the method according to one of the preceding claims, characterized in that the electronic memories and their associated circuits for eliminating the production tolerances and operational defects and malfunctions, and circuits for calculating the widths of the partial shadows for individual optical elements of the sensor optical pickup are formed on a common semiconductor substrate, which is arranged in the optical pickup.
    类似技术:
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    CH710572A8|2016-09-30|
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    WO1998008079A1|1996-08-20|1998-02-26|Zellweger Luwa Ag|Device for optical capture of a parameter of a longitudinally moving thread-shaped body|
    DE19830395A1|1998-07-08|2000-01-13|Schlafhorst & Co W|Process for the contactless measurement of strand-like fiber material|
    CN201634816U|2010-04-20|2010-11-17|江苏圣蓝科技有限公司|Yarn fault-clearing monitoring system|
    WO2012051730A1|2010-10-19|2012-04-26|Uster Technologies Ag|Yarn clearer and method for clearing yarn|
    CZ304758B6|2013-07-16|2014-09-24|Rieter Cz S.R.O.|Method of monitoring quality of yarn by yarn cleaner and sensor for making the same|
    CZ2013567A3|2013-07-16|2014-08-27|Rieter Cz S.R.O.|Monitoring method of at least one quality parameter of yarn and/or sensor parameters by a yarn electronic cleaner n l|
    CZ304682B6|2013-07-16|2014-08-27|Rieter Cz S.R.O.|CMOS optical scanner containing a plurality of optical elements for a device for determining parameters of moving yarn on textile machines|CN111926427B|2020-08-07|2021-12-28|苏州汇川技术有限公司|Single-spindle detection system, control method, device and storage medium|
    法律状态:
    2016-08-15| PK| Correction|Free format text: BERICHTIGUNG ERFINDER |
    2016-09-30| PK| Correction|Free format text: ERFINDER BERICHTIGT. |
    2019-08-15| AZW| Rejection (application)|
    2020-05-29| AEN| Modification of the scope of the patent|Free format text: :DIE PATENTANMELDUNG WURDE AUFGRUND DES WEITERBEHANDLUNGSANTRAGS VOM 9.10.2019 REAKTIVIERT. |
    优先权:
    申请号 | 申请日 | 专利标题
    CZ2014-966A|CZ2014966A3|2014-12-30|2014-12-30|Method of monitoring yarn quality in optical scanner of yarn quality and optical scanner for making the same a yarn|
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