JP2007002363A - Method and apparatus for inspecting color development of yarn package - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for inspecting the color development of a yarn package, by which the color development inspection can automatically be performed in a largely shortened inspection time in high reliability and in good stability without relying on a manual work spending a long time and many labors, and also performed on line during the production of a color-developing yarn, thereby enabling the quick and sure control of the yarn quality on the basis of the measured color data, and to provide an apparatus therefor. <P>SOLUTION: This method for inspecting the color development of the yarn package comprises rotating the yarn package 7 comprising the color-developing yarn with a rotator 4, irradiating the rotated yarn package 7 with light from a light source 3, receiving reflected light from the yarn package 7 with a measurement head 6 of a spectrophotometer 2, separating the obtained reflected light into a spectrum, and then inspecting a quality related to the color development of the yarn package 7 on the basis of the obtain reflected spectrum. And the apparatus therefor. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a method and an apparatus for inspecting color development of a yarn package, which controls the quality of the yarn package by irradiating the yarn package with light and measuring the light obtained by reflection.

  Optical coherent fibers (color-forming fibers) having an alternate laminate in which at least two kinds of polymers are alternately laminated in a thin film shape along the fiber axis direction are disclosed in, for example, JP-A-11-1818 and JP-A-11-1826. No. 11-1827, No. 11-1828, No. 11-1829, and the like.

  The fibers obtained in the above-mentioned patent documents can simultaneously obtain the deep color and luster of South American morpho butterflies, and are completely different from dyes and pigments. It is known that Such a color-forming fiber having optical interference properties is obtained by spinning a polymer obtained by alternately laminating two kinds of polymers in a spinneret having a complicated structure from a spinning hole, thereby forming an alternate laminate along the fiber axis. It is manufactured by forming. At this time, unless the thickness of each layer of the alternating laminate is precisely controlled as designed, it is not possible to produce color-forming fibers exhibiting the targeted color.

  For this reason, in order to manufacture a spinneret that spins chromogenic fibers as designed, high-precision manufacturing dimensions and assembly accuracy are required. Further, it is necessary to strictly control the spinning conditions in the melt spinning process for spinning the chromogenic fibers. However, if chromogenic fibers are manufactured repeatedly over a long period of time, the accuracy of assembling the spinneret deteriorates and wear due to polymer flow occurs, so that normal chromogenic fibers cannot be obtained. Situation arises.

  Conventionally, a method for inspecting the quality abnormality of such a color-forming fiber having optical interference has been performed by a method in which a yarn sampled from a wound yarn package is sensuously inspected by human eyes. It was. However, since it is extremely difficult for an inspector to confirm color development abnormality with the naked eye, until now, the color development property has been quantitatively evaluated using a spectrocolorimeter that can be used relatively easily. .

  At that time, when evaluating the color developability of the fiber using the spectrocolorimeter, (1) a yarn sample is taken from the yarn package, and (2) the collected yarn sample is made into a plate (baren). Winding, so-called valene winding work, (3) After the work, each balene was fixed to the support part of the colorimeter, and the color measurement of each sample taken by the worker from the yarn package was performed, (4) Obtaining the peak wavelength at which the reflection spectrum for each wavelength obtained by measurement peaks, and (5) recording the presence / absence of abnormality for each yarn sample, following the procedure from (1) to (5) above Has been done.

  However, since the inspection procedures (1) to (5) are performed manually by workers, much time and labor are spent on the color development inspection. Therefore, in order to further shorten the color measurement time, an inspection method capable of performing color measurement in a package without performing valen winding work is required.

  In this way, the reason for having to take a yarn sample from the yarn package, wind it in a plate shape (baren), and perform a colorimetric inspection of the chromogenic fiber is that the wound yarn remains in the yarn package. This is because the color measurement of the strip is highly reliable and stable data cannot always be obtained. This problem will be described with reference to FIG.

  FIG. 4 shows a known spectroscopic method in which 10 packages are arbitrarily selected as measurement points after the package around which the color-forming yarn is wound, and the measurement conditions are all the same at these 10 measurement points. The reflection spectrum curve measured by the colorimeter is illustrated. In FIG. 4, the horizontal axis represents each wavelength (nm) obtained by spectroscopically analyzing the light reflected from the yarn package, and the vertical axis represents the reflectance (%).

  Normally, when measuring the color of a sample with a spectrocolorimeter that requires a certain degree of accuracy, the standard white plate approximated to a complete diffusion surface is irradiated with barium sulfate or the like, and the reflected light from this standard white plate is irradiated. Data is obtained, and then the measurement light is irradiated to the yarn package as the test sample to similarly obtain the reflected light amount data of the test sample. Then, the ratio of the reflected light amount data of the test sample to the reflected light amount data of the standard white plate is calculated to obtain the reflectance (%) of the test sample. The reflectance (%) of FIG. It is what I have sought.

  Thus, when FIG. 4 which illustrated the reflection spectrum of the yarn package measured with the spectrocolorimeter is seen, it can be seen that the reflection spectrum differs greatly at the measurement location. It can also be seen that each of the obtained reflection spectrum curves is not a smooth curve, but a shaky curve with large and small irregularities. Therefore, it is clear that such data cannot be obtained with high reliability and always stable data.

  Moreover, as described above, it is needless to say that the color development test cannot be performed on-line during the winding of the chromogenic fiber in the method of inspecting the chromogenic property after winding as a yarn package. It has been strongly desired to establish a technique that enables a color development test even during the production of conductive fibers.

Japanese Patent Laid-Open No. 11-1818 JP-A-11-1826 Japanese Patent Laid-Open No. 11-1827 Japanese Patent Laid-Open No. 11-1828 Japanese Patent Laid-Open No. 11-1829

  In view of the problems of the conventional technology described above, the problem to be solved by the present invention is to automatically perform a color development test with high reliability and goodness without relying on a lot of time and labor. It is an object of the present invention to provide a color development inspection method and apparatus that can be implemented while maintaining stability. Furthermore, even during the production of chromogenic fibers, it is possible to immediately perform a chromogenic test online, and the resulting colorimetric data enables quick and reliable management of the fiber quality, further reducing the inspection time. It is an object of the present invention to provide a color development inspection method and apparatus which can be greatly shortened.

Here, as a color development inspection method according to the present invention for achieving the above-mentioned problems,
(1) Rotating a yarn package made of chromogenic fibers, irradiating the rotating yarn package with light from a light source, receiving reflected light from the yarn package, and spectroscopically analyzing the obtained reflected light, A method for inspecting the color development of a yarn package, characterized in that a quality inspection relating to the color development of the yarn package is carried out based on a reflection spectrum obtained by spectroscopy;
(2) By the color difference (ΔE ^* ab) obtained from the L * a * b * value that is the representative color of each yarn package obtained by spectroscopy and the reference L * a * b * value obtained in advance through experiments Inspecting the color developability of each yarn package (1)
(3) The peak wavelength at which the reflectance is maximized is determined from the reflection spectrum of each yarn package, and this peak wavelength is compared with a reference peak wavelength that has been determined in advance by experiment, and the difference is the management upper limit value and the management lower limit value (1) or (2) the color development test method for a yarn package according to (1),
(4) The color development test is performed on the yarn package that rotates while winding the yarn package in the process of producing the color development fiber. The color development of the yarn package according to any one of (1) to (3) Sex testing methods and
(5) The method for inspecting color development of a yarn package according to (4), in which color measurement is performed while always maintaining a light receiving position of reflected light reflected from the yarn package being wound.

Next, as the color development inspection apparatus of the present invention,
(6) Rotating device for rotating a yarn package made of chromogenic fibers, a light source for emitting light to the yarn package, and a measurement for receiving reflected light emitted from the light source and reflected from the yarn package A spectrocolorimeter having a head, and a color development evaluation device for performing color development evaluation processing using a reflection spectrum obtained from the spectrocolorimeter, and performing a quality inspection related to the color development of the yarn package. An apparatus for inspecting the color development of a yarn package,
(7) Based on the reflection spectrum data obtained by the spectrocolorimeter, the color developability evaluation apparatus obtains a peak wavelength at which the reflectance is maximum, and a reference peak obtained in advance through experiments. The color of the yarn package according to (6), wherein the color of the yarn package is inspected for abnormality in the color quality of each yarn package based on whether or not the difference is between the control upper limit value and the control lower limit value. Sex testing device,
(8) L * a * b * value which is a representative color of each yarn package obtained by the spectrocolorimeter, and a reference L * a * b * value obtained in advance by experiment (1) an apparatus for inspecting the color development of each yarn package based on the color difference (ΔE ^* ab) obtained from the above,
(9) The color developability of the yarn package according to any one of (6) to (8), wherein an alarm is issued when a color development abnormality of each yarn package is detected by the color development evaluation device. Inspection equipment,
(10) Any one of (6) to (9), wherein the measuring head of the spectrocolorimeter is a light projecting / receiving integrated measuring head that projects light from a light source and receives reflected light from a yarn package. The color development inspection device for the yarn package as described in
(11) The color development test of the yarn package according to any one of claims 6 to 10, wherein an optical fiber for guiding light from the light source to a specific position of the yarn package to be inspected is provided between the light source and the measurement head. apparatus,
(12) The yarn package color development inspection apparatus according to any one of (6) to (11), wherein the yarn package rotation device is a winder that winds the color development fibers as a yarn package, and
(13) A distance sensor for measuring the distance between the yarn package and the measuring head, and a measurement for keeping the distance between the yarn package and the measuring head constant from distance information measured by the distance sensor. The yarn package color development test apparatus according to (12), comprising a slide means for moving the head.

  According to the present invention, in order to inspect the color developability of the color developing fiber, in the case of the yarn package after winding is finished, the yarn package is placed on the rotating device and rotated, and the spectrocolorimeter Spectral colorimetry is performed while keeping the distance between the measuring head and the surface of the yarn package constant. In addition, when producing chromogenic fibers, it is possible to easily and automatically smooth the reflection spectrum obtained by the spectrocolorimeter by targeting the yarn package being wound by the winder. it can. In either case, the color of the rotating yarn package can be measured to easily and automatically smooth the reflection spectrum. For example, the peak wavelength value of the reflection spectrum can be uniquely determined.

In this way, the smoothed reflection spectrum curve is taken into the color development evaluation apparatus, and the reflection intensity (reflectance) for each wavelength is analyzed and quantified, whereby the color information data of each yarn package, for example, By quickly calculating the peak wavelength, L * a * b * value, color difference (ΔE ^* ab), half-width, etc., the color development characteristic of the yarn package can be confirmed. Further, if a reference value and a management value range for these color information data values are experimentally determined in advance and compared with each other, a yarn package having an abnormal color developability can be detected. Therefore, by using the color development test method and apparatus of the present invention, the quality of the yarn package made of color development fibers can be controlled.

  In addition, since the color development test can be performed automatically while maintaining high reliability and good stability, the test time is greatly shortened without relying on a lot of time and labor. can do. Furthermore, even during the production of chromogenic fibers, it is possible to immediately perform a chromogenic test online, and the resulting colorimetric data enables quick and reliable management of the fiber quality, further reducing the inspection time. It can be greatly shortened.

  In addition, when performing a color development test online, it is necessary to always perform color measurement at a certain distance in order to ensure the uniqueness of the color measurement data. For this purpose, in the present invention, the distance sensor measures the distance between the surface of the yarn package and the measuring head of the spectrocolorimeter, and keeps the distance constant while feeding back the measured distance signal to the computer. Such a problem can be avoided by moving the measurement head for measurement.

  First, the chromogenic fibers used in the present invention include, for example, JP-A-11-1818, JP-A-11-1826, JP-A-11-1827, JP-A-11-1828, JP-A-11-. It can be produced by a known method described in Japanese Patent No. 1829. Here, as an example, a color-forming fiber having the following constitution is mentioned, but the color-forming fiber of the present invention is not limited to this example.

  That is, for example, polyethylene naphthalate copolymerized with 10 mol% terephthalic acid and 1 mol% sodium sulfoisophthalic acid (with an intrinsic viscosity of 0.55 to 0.59; naphthalenedicarboxylic acid 89 mol%) and nylon 6 ( The intrinsic viscosity is 1.3) under a volume ratio (composite ratio) of 2/3, and composite spinning is performed using a well-known die described in JP-A-11-124773, and the number of flat cross-section layers is 61. The undrawn yarn is wound at a winding speed (spinning speed) of 1500 m / min. Next, the original yarn of the chromogenic fiber is stretched 2.0 times by a roller type stretching machine comprising a supply roller heated to 110 ° C. and a stretching roller heated to 170 ° C., and 90 denier / 12 filaments are stretched. The yarn was wound up at 3000 m / min. When the film thicknesses of the two polymer layers at the center of the obtained flat yarn were measured, the polyethylene naphthalate layer was 0.07 μ, the nylon layer was 0.08 μ, and a green interference color was recognized.

[First Embodiment]
FIG. 1 schematically shows a first embodiment of a chromogenicity inspection apparatus according to the present invention for explaining a method and apparatus for evaluating the chromogenicity after winding a yarn made of chromogenic fibers as a package. It is the schematic block diagram illustrated in. In FIG. 1, 1 is a display, 2 is a light source that projects light onto the package, 3 is a spectrocolorimeter (for example, fiber type colorimeter: MCPD-3000 manufactured by Otsuka Electronics), 4 is a package rotating device, A fixing member, 6 is a measuring head, 7 is a yarn package, 9 is a rotation speed controller, 10 is a cable made of an optical fiber, and 11 is a color development evaluation device for performing color development evaluation processing.

  The color development evaluation apparatus 11 has a function of computing the reflection spectrum data measured by the spectrocolorimeter 3 from the yarn package 7 made of color development fibers. Usually, a microcomputer is preferably used. Can be used. Therefore, in the following description, “color development evaluation apparatus 11” is simply referred to as “computer 11”.

  In the embodiment of the color development inspection apparatus configured as described above, when inspecting the wound yarn package 7 after winding, the package 7 is first fixed on the turntable 4 a of the package rotation device 4. At this time, the turntable 4a is connected to a rotation driving device that makes the number of rotations variable, and the rotation speed adjuster 9 allows the rotation speed of the yarn package 7 to be changed to, for example, 30 to 180 rpm. Needless to say, the number of rotations is not limited to 30 to 180 rpm as long as the reflection spectrum curve obtained from the reflected light from the yarn package 7 can be smoothly and smoothly smoothed. However, if the rotation is too fast, it is not preferable because the yarn package 7 is affected by a collapse.

  As described above, in the color development test method and apparatus of the present invention, the yarn package 7 once wound by a winder or the like is necessary for evaluation of color development while being rotated by the package rotating device 4 without being stationary. The main feature is that the data is measured by the spectrocolorimeter 3. Here, the reason why it is necessary to evaluate the color developability while rotating the yarn package 7 in this manner is shown in FIG. 4 (reflected spectrum of reflected light from the yarn package 7 in a stationary state). A detailed explanation will be given again with reference to the figure of the distribution measured.

  In FIG. 4, when the reflection spectrum is measured from the stationary yarn package 7, the reflectance and reflection direction of the reflected light are different in various places due to the influence of the yarn layer wound in different directions at a predetermined traverse angle. Reflected light interferes with each other, and the reflection spectrum curve does not become a smooth curve depending on the location to be measured, but becomes a loose curve with large and small irregularities. In addition, the region where the peak wavelength exists becomes broad (wide and gentle shape), and the peak wavelength may not be specified.

  If it does so, an error will be included when calculating the peak value of the reflection spectrum of the light reflected from the yarn package 7. In addition, the reflection spectrum is not uniquely determined at different measurement points. In order to solve this problem, it is possible to average the data collected at each measurement point. However, this method cannot reduce the inspection time, which is the original purpose. Therefore, as a result of repeated experiments as a simpler inspection method, it has been found that the reflection spectrum can be smoothed by rotating the yarn package 7.

  FIG. 3 shows the case where the average of the measurement of the reflection spectrum of the stationary yarn package 7 at 10 different measurement points and the measurement of the reflection spectrum by rotating the yarn package 7 are displayed in an overlapping manner. FIG. From FIG. 3, the reflection spectrum curve can be smoothed by rotating the yarn package 7 using the method and apparatus of the present invention, and the stationary yarn package 7 is reflected at ten different measurement points. It can be seen that results equivalent to those obtained by averaging the measured spectra are obtained.

  Next, in the present invention, the measuring head 6 of the spectrocolorimeter 3 is attached to the fixing member 5 at a position several tens of millimeters away from the surface of the yarn package 7 and is rotated by the package rotating device 4. The package 7 is inspected without contact. By doing so, since the yarn package 7 is kept in a specific contact state with the measuring head 6, it does not come into contact with the measuring head 6 and damage the yarn wound around the package 7.

  At this time, light emitted from the light source 2 is projected onto the yarn package 7 from a light projecting unit (not shown) provided in the measurement head 6, and the irradiated light is reflected from the surface of the package 7. Then, the light is received by a light receiving portion (not shown) provided in the measuring head 6. The reflected light received in this way is taken into the spectrocolorimeter every several m to several tens of milliseconds and continuously sampled as reflection spectrum data. In addition, it is preferable that the reflection intensity and reflectance with respect to each wavelength thus obtained can be confirmed on the display 1.

  The reflection spectrum data sampled in this way is sent to the computer 11 when a predetermined time interval or necessity arises, and sent to a storage device (not shown) attached to the computer 11, It is stored here. Next, the computer 11 takes out the reflection spectrum data stored in the storage device, and performs a color property inspection process for the yarn package 7. In this way, when the reflection spectrum data is obtained from the reflected light from the yarn package 7, for example, the peak wavelength value that becomes the peak value from the data for each wavelength and the representative color system corresponding thereto are obtained. The representative color value (color value) can be obtained by a computer.

As described above, when the color development evaluation data of the yarn package 7 is obtained, the color of the yarn package 7 inspected by the computer 11 is determined to be normal color by comparing with the reference value obtained in advance. Judgment processing can be carried out to determine whether or not it shows sex. In the present invention, as the color system, L ^* a ^* b ^* color system and XYZ (Yxy) color system established by the Commission International de l'Eclairage (abbreviation: CIE). Etc. can be used. At this time, when the peak wavelength value is adopted as the evaluation value, the computer 11 obtains the distance (difference) between the reference peak wavelength value and the peak wavelength value of the inspected yarn package 7. Then, it is only necessary to evaluate whether or not this difference is within a reference value between the control upper limit value and the control lower limit value that guarantee the color developability.

At that time, for example, in the case of employing the L * a * b * values as color system evaluates the yarn package as a reference for evaluation, previously first obtained the L ^* a ^* b ^* values of the reference package . Next, the yarn package 7 to be inspected is sequentially evaluated to obtain each L ^* a ^* b ^* value. Then, the computer 11 calculates the reference package L ^* a from the well-known calculation formula of ΔE ^* ab = [(ΔL ^* ) ² + (Δa ^* ) ² + (Δb ^* ) ² ] ^1/2 according to the CIE standard. ^* b ^* calculated value, a color difference (ΔE ^* ab) between the L ^* a ^* b ^* value obtained from each package to be evaluated. Then, from the color difference (ΔE ^* ab) obtained in this way, it is evaluated whether the color difference is within the control upper limit value and the control lower limit value that ensure the color developability. If there is a yarn package 7 that does not fall between the control upper limit value and the control lower limit value, it can be detected as a yarn package having an abnormal quality.

In the present invention, when inspecting the color developability of the yarn package, it is preferable to use the L ^* a ^* b ^* color system that is often used in general, but the XYZ (Yxy) color system, L ^* It is possible to use other color systems such as a ^* b ^* color system in the same way. In addition, when the half width of the reflection spectrum exceeds 200 nm, the fibers are colored multiple times, and since the color development cancels each other, the color development cannot be visually recognized by the naked eye. Therefore, it is also possible to monitor the half width of the reflection spectrum. It is preferable as one item for evaluating the color developability of the strip package.

In this way, when the color development test of one yarn package 7 is completed, another yarn package 7 is placed on the turntable 4a and the same processing is sequentially performed, so that a large number of yarn packages are obtained. 7 can be completed quickly and easily in a short time. At that time, based on the reflection spectrum data obtained by the spectrocolorimeter 3, the computer 11 converts it into desired color information data such as peak wavelength, L * a * b * value, color difference (ΔE ^* ab), and the like. The quality control of each yarn package 7 can be performed by performing arithmetic processing and quantifying the color information of each yarn package 7.

  However, when performing the color development inspection process as described above, it is preferable that the light emitted from the light source 2 to the yarn package 7 is directly applied to the yarn package 7 via the cable 10 made of an optical fiber. This is because, by doing so, the light emitted from the light source 2 can be guided to the target position of the yarn package 7 with aiming. Therefore, in consideration of the points described above, the measuring head 6 is a pair of light emitting and receiving optical fiber type spectrocolorimeters (for example, MCPD-3000 manufactured by Otsuka Electronics Co., Ltd.). Can be used). In addition, the spot diameter (diameter) of the light beam formed by projecting from the measuring head 6 onto the cylindrical surface of the yarn package 7 is several mm to several tens of mm.

  In this case, it is needless to say that the measurement conditions and measurement accuracy of the spectrocolorimeter must always be constant before starting the color development test of the yarn package 7. For this purpose, first, measurement light from the light source 2 is irradiated onto a standard white plate having an approximate perfect diffusion surface formed of barium sulfate, ceramics, or the like, and reflected light amount data of the standard white plate is obtained. Next, the ratio of the reflected light amount data from the yarn package 7 to the reflected light amount data of the standard white plate is calculated, and then the reflectance of the test sample is obtained, and a reference value for measuring the yarn package 7 is obtained. Use as In the embodiment of the present invention, since the color measuring method is defined in Japanese Industrial Standard JIS Z 8722, the optical system and the reflectance measuring method are based on this spectral colorimetric method.

  The amount of reflected light data measured using the standard white plate can be measured only once in principle, but it can respond to changes in various measurement environments such as changes in light emission efficiency over time or temperature. Therefore, it is preferable to periodically calibrate each reflected light amount data obtained by measurement. In this case, it is preferable that the measuring head 6 is detachably fixed to the fixing member 5, so that it can be removed at the time of reference measurement using a standard white plate at the beginning of the inspection.

  Next, the light source 2 used in the present invention will be described. The color of light obtained by reflection from the yarn package 7 is greatly influenced by the color of the light source to be projected. However, the light source is not particularly limited as long as the light source can be accurately and quickly performed and has a stable performance without change with time. However, as a light source used in the present invention, it is a standard light source to use an A light source, a C light source, and a D light source having a color temperature of 5500K, 6500K, or 7500K, which are defined as standard light sources by the CIE (International Lighting Commission). It is preferable in that it can be easily obtained and always exhibits a certain performance stably.

  As described above, when the yarn package 7 is rotated using the method and apparatus of the present invention, the reflection spectrum can be smoothed, and the color development test of the yarn package 7 can be automatically and easily performed accurately and stably. And it was possible to carry out in a short time. Thus, when this major feature of the present invention is examined again, in the manufacturing process of the chromogenic fiber, it is an essential process to wind the yarn as the package 7.

  Thus, in the manufacturing process of the chromogenic fiber, the yarn package 7 is wound on the rotating bobbin. Therefore, it is not necessary to rotate the yarn package 7 once wound, and the yarn package 7 is rotated in the winding step. If the yarn package 7 is directly measured, the color development test can be performed online during the production of the color development fiber. The inventors have come up with the idea and have completed the invention relating to the second embodiment described below.

[Second Embodiment]
FIG. 2 shows a method and apparatus for on-line evaluation of the color development property of a yarn package made of a color developing fiber while it is being wound on a bobbin by a winder (winder) (that is, during the production of the color developing fiber). It is the schematic block diagram which illustrated typically 2nd Embodiment of the color development test | inspection apparatus concerning this invention which demonstrated this. In FIG. 2, reference numeral 8 denotes a distance sensor, reference numeral 12 denotes a winder (winder), reference numeral 13 denotes a slide means, and other reference numerals indicate elements having the same effect in accordance with FIG.

  In the second embodiment illustrated in FIG. 2, when the chromogenic fiber is wound on a winder (AW-908 winder) at, for example, 3000 m / min after the final drawing step, the yarn package 7 passes over time. At the same time, the package diameter increases gradually and the package diameter increases. As a result, the yarn package 7 to be measured approaches the measuring head 6, and the distance between the measuring head 6 and the surface of the yarn package 7 approaches. If it does so, since the amount of reflected light from the yarn package 7 will change, the reflection spectrum of the yarn package 7 cannot be obtained correctly.

  Therefore, in order to solve such a problem, it is necessary to provide the distance sensor 8 and the slide means 13 for keeping the distance between the measuring head 6 and the surface of the yarn package 7 constant. That is, in the color development test apparatus of this example, as shown in FIG. 2, the distance sensor 8 is first provided in the measurement head 6 in order to calculate the distance between the measurement head 6 and the yarn package 7. In addition, as such a distance sensor 8, by irradiating the laser beam to the yarn package 7 and receiving the laser beam reflected from the yarn package 7, the measurement head 6 and the surface of the yarn package 7 are It is preferable to use an integrated light emitting and receiving type that measures the distance between the two.

  As described above, on the other hand, when the distance between the measuring head 6 and the yarn package 7 is measured as an analog value (or a digital value) by the distance sensor 8, it is converted into an analog voltage signal and further required. In response, the voltage signal amplified by the amplifier is sent from the analog input port to the computer 11 (or a general-purpose sequencer) that functions as a control device for controlling the distance at a constant value via the A / D converter (analog / digital converter). Is taken in as. Although the computer 11 is used as the control device here, a dedicated control device such as a general-purpose sequencer may be prepared separately from the computer 11.

  On the other hand, the measuring head 6 and the distance sensor 8 are fixed to the slide means 13 via the fixing member 5, and a pulse motor (not shown) is attached to the slide means 13. Therefore, the distance between the measurement head 6 and the surface of the yarn package 7 taken into the computer 11 is calculated by the computer 11 and converted to a pulse signal corresponding to the distance deviation so that the distance is always kept constant. The converted pulse signal is fed back to the servo motor.

In this way, the measuring head 6 and the distance sensor 8 fixed together with the slide means 13 are controlled by the servo motor so as to keep the distance between the yarn package 7 constant. It should be noted that the movement of the measuring head 6 and the distance sensor 8 by the slide means 13 may be performed at every colorimetric sampling period, and it is sufficient to perform this colorimetric sampling periodically at intervals of several seconds to several minutes. The colorimetric data obtained by the spectrocolorimeter 3 at each colorimetric sampling period is transmitted to the computer 11 each time, stored in a storage device attached to the computer 11, and the color difference (ΔE ^* ab) described above. ) Etc. Then, the yarn package 7 being manufactured can be automatically inspected online by comparing these values with normal values by the computer 11i.

  Further, a graph is displayed over time on the display 1, and further printed on a sheet by a printer as necessary. At this time, a specific value representing the color information of the yarn package 7, such as a peak wavelength value or a color difference, is used as the colorimetric data to be displayed in a graph on the display 1 or information obtained by computer processing. Moreover, if the normal control range values obtained experimentally in advance are obtained and displayed in an overlapping manner, the yarn package 7 being manufactured is quality-controlled in real time by the eyes of the worker online. be able to.

  In this way, the color information of the yarn package 7 being wound (rotating) is measured by the spectrocolorimeter 3 and analyzed by the computer 11 based on each reflection spectrum data, whereby each yarn is analyzed. The color characteristic information of the yarn package 7 can be quantified, and the quality control of each yarn package 7 can be performed quickly and automatically by keeping it within the predetermined control value range. It is. At this time, when the color quality is evaluated to be abnormal, if an alarm is issued, the yarn package 7 having the abnormal color characteristic is detected when it is generated, and appropriate processing is performed on the spot. It becomes possible to do.

It is the schematic which illustrated typically the apparatus structure of 1st Embodiment of this invention which measures a reflection spectrum, rotating the yarn package after winding once. It is the schematic which illustrated typically the apparatus structure of the 2nd Example of this invention which measures the reflection spectrum of a yarn package in a winding process during manufacture of color development fiber. It is the figure which showed the reflection spectrum curve calculated | required by averaging the reflection spectrum which measured the stationary yarn package in arbitrary 10 places, and the reflection spectrum curve measured in one specific place by rotating the yarn package is there. It is the reflection spectrum curve which measured the stationary yarn package in 10 arbitrary places.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Display 2 Light source 3 Spectral colorimeter 4 Package rotation apparatus 5 Fixed member 6 Measuring head 7 Package 8 Distance sensor 9 Rotation speed controller 10 Cable 11 Color development evaluation apparatus (computer)
12 Winder (winder)
13 Slide means

Claims (13)

  Rotate the yarn package made of chromogenic fibers, irradiate the rotating yarn package with the light from the light source, receive the reflected light from the yarn package, split the resulting reflected light, A method for inspecting the color development of a yarn package, wherein a quality inspection relating to the color development of the yarn package is carried out by the obtained reflection spectrum. Each yarn is determined by the color difference (ΔE ^* ab) obtained from the L * a * b * value, which is the representative color of each yarn package obtained by spectroscopy, and the reference L * a * b * value obtained in advance through experiments. The method for inspecting the color development of a yarn package according to claim 1, wherein the color development of the package is inspected.   From the reflection spectrum of each yarn package, find the peak wavelength at which the reflectance is maximum, compare this peak wavelength with the reference peak wavelength previously determined by experiment, and the difference is between the control upper limit value and the control lower limit value. The method for inspecting the color development of a yarn package according to claim 1 or 2, wherein an abnormality in the color development quality of each yarn package is inspected depending on whether or not the yarn package is present.   The color development test method for a yarn package according to any one of claims 1 to 3, wherein a color development test is performed on a yarn package that rotates during winding of the yarn package in the production process of the color development fiber.   5. The method for inspecting color development of a yarn package according to claim 4, wherein the color measurement is performed by always maintaining a light receiving position of reflected light reflected from the yarn package being wound.   A rotating device that rotates a yarn package made of a color-forming fiber, a light source that projects light onto the yarn package, and a measurement head that receives reflected light that is projected from the light source and reflected from the yarn package A quality test relating to the color developability of the yarn package is carried out, comprising a spectrocolorimeter and a color developability evaluation device that performs a color developability evaluation process using the reflection spectrum obtained from the spectrocolorimeter. A device for inspecting color development of yarn packages, characterized by   Based on the reflection spectrum data obtained by the spectrocolorimeter, the color development evaluation device obtains a peak wavelength at which the reflectance is maximum, and compares this peak wavelength with a reference peak wavelength obtained in advance by experiment. The yarn package color development inspection device according to claim 6, wherein the device is used to inspect an abnormality in color development quality of each yarn package depending on whether or not the difference is between a management upper limit value and a management lower limit value. . The color development evaluation device was determined from the L * a * b * value that is a representative color of each yarn package obtained by the spectrocolorimeter, and the reference L * a * b * value obtained in advance by experiment. 7. The yarn package color development inspection device according to claim 6, wherein the color development property of each yarn package is inspected based on a color difference (ΔE ^* ab).   The color development inspection device for a yarn package according to any one of claims 6 to 8, wherein an alarm is issued when a color development abnormality of each yarn package is detected by the color development evaluation device.   The yarn according to any one of claims 6 to 9, wherein the measuring head of the spectrocolorimeter is a light projecting / receiving integrated measuring head that projects light from a light source and receives reflected light from a yarn package. Package color development tester.   The color development inspection device for a yarn package according to any one of claims 6 to 10, wherein an optical fiber for guiding light from the light source to a specific position of the yarn package to be inspected is provided between the light source and the measurement head.   12. The yarn package color development inspection apparatus according to claim 6, wherein the yarn package rotation device is a winder that winds the color-developing fibers as a yarn package.   A distance sensor for measuring the distance between the yarn package and the measuring head, and the measuring head is moved to keep the distance between the yarn package and the measuring head constant from the distance information measured by the distance sensor 13. A device for inspecting color developability of a yarn package according to claim 12, further comprising slide means for causing the yarn package to slide.

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