WO2014089714A2 - Erkennung einer periodischen struktur in einem bewegten länglichen textilmaterial - Google Patents
Erkennung einer periodischen struktur in einem bewegten länglichen textilmaterial Download PDFInfo
- Publication number
- WO2014089714A2 WO2014089714A2 PCT/CH2013/000210 CH2013000210W WO2014089714A2 WO 2014089714 A2 WO2014089714 A2 WO 2014089714A2 CH 2013000210 W CH2013000210 W CH 2013000210W WO 2014089714 A2 WO2014089714 A2 WO 2014089714A2
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- WO
- WIPO (PCT)
- Prior art keywords
- detection
- textile material
- light
- detection sites
- detection points
- Prior art date
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Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06H—MARKING, INSPECTING, SEAMING OR SEVERING TEXTILE MATERIALS
- D06H3/00—Inspecting textile materials
- D06H3/08—Inspecting textile materials by photo-electric or television means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H63/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package
- B65H63/06—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to presence of irregularities in running material, e.g. for severing the material at irregularities ; Control of the correct working of the yarn cleaner
- B65H63/062—Electronic slub detector
- B65H63/065—Electronic slub detector using photo-electric sensing means, i.e. the defect signal is a variation of light energy
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
- G01N21/8914—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles characterised by the material examined
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
- G01N21/8914—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles characterised by the material examined
- G01N21/8915—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles characterised by the material examined non-woven textile material
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
- G01N21/892—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles characterised by the flaw, defect or object feature examined
- G01N21/8922—Periodic flaws
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/36—Textiles
- G01N33/367—Fabric or woven textiles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2701/00—Handled material; Storage means
- B65H2701/30—Handled filamentary material
- B65H2701/31—Textiles threads or artificial strands of filaments
Definitions
- the present invention is in the field of textile material testing. It relates to a method and a device for detecting a periodic structure in a moving elongated textile material, according to the preambles of the independent
- the invention can be used, for example, in yarn testing machines in textile laboratories or in yarn cleaners on spinning or winding machines.
- the present invention uses the optical sensor principle, the z. B. from WO-2004/044579 AI is known.
- the textile material is illuminated by a light source and light interacting with the textile material is detected by light detectors.
- the detected light is a measure of the diameter of the textile material and / or its optical properties such as reflectivity or color.
- the sensor lines themselves are usually implemented in CMOS or CCD technology and are available on the market. Examples of such optical textile measuring devices are in the specifications CH-643'060 A5,
- EP-1'553O37 AI discloses a device for measuring speed on a running yarn.
- the device has a plurality of equidistantly arranged in the direction of the yarn light receiver.
- the yarn is illuminated in transmission so that its shadow falls on the light receivers.
- inherent irregularities such as protruding fibers generate time-varying signals in the light receivers.
- the signals of the individual light receivers are added to form a sum signal.
- the yarn speed results from the multiplication of the sum signal
- the scanning signal contains a single frequency component with a certain fundamental frequency.
- subharmonics of the fundamental frequency occur in the scanning signal.
- Printed circuit boards with optical waveguide structures and electrical conductor structures are known per se, for example from US-2010/0209854 AI. PRESENTATION OF THE INVENTION
- the periodic structure should also be quantifiable if possible.
- the theoretical background of the invention is the system theory for linear systems.
- the invention is based on the idea that the textile material at several along its
- Sum signals a local spectrum of the structure of the textile material can be obtained.
- a Fourier transformation of the structure of the textile material can be produced virtually without any computational effort.
- the detection points are those points where the textile material is scanned directly. They are as close as possible to the textile material or at his
- the distance between the textile material and a detection point is preferably between 0.1 mm and a few millimeters. Attached to the detection points are elements intended to receive physical signals bearing information about the textile material. The physical signals can z. B. transmitted by electromagnetic fields.
- ends of optical waveguides are located at the detection points, and measuring electrodes in another embodiment.
- a particularly suitable technology for the practice of the invention is an optical waveguide structure integrated on a substrate. First, it allows a dense linear array of many discrete detection sites in a scan area.
- the smallest equidistance of the detection sites should be at most as large as the smallest spatial period to be detected in the textile material, and the length of the scanning region should be at least as large as the largest detecting spatial period.
- waveguide branches can be realized with the integrated-optical waveguide structure, by means of which the light components detected at a plurality of detection sites can be brought together so that an optical sum signal results after the merging.
- optical sum signal or “addition of light components” is meant in the present document the sum or addition of the individual light intensities.
- the textile material is simultaneously scanned at a plurality of discrete, arranged along its longitudinal direction and equidistantly spaced detection sites, detected at the detection points
- Scanning signals are added to a sum signal, and due to temporal changes of the sum signal is concluded that a periodic structure of the textile material.
- multiple groups of each of a plurality of discrete detection sites are provided, wherein the detection sites within each group are equidistant and the aquidistances of the different groups are different.
- the detected scanning signals are added to a sum signal, and due to temporal changes of the individual
- Summed signals are compared periodic components in the structure of the textile material. It is advantageous to automatically display values of a variable corresponding to the temporal changes for the several groups in a diagram.
- each value is given the equidistance of group concerned and / or with a spatial frequency which essentially corresponds to the reciprocal of the Aquidistanz called.
- the number of groups is, for example, between 2 and 50, preferably between 5 and 20.
- the number of detection sites is, for example, between 5 and 500, preferably between 20 and 200.
- All detection points can lie on an equidistant grid.
- the Aquidistanz the grid is, for example, between 0.1 mm and 10 mm.
- the scanning is carried out optically at the detection sites.
- the sum signal may be a sum of intensities of light components detected at the detection sites.
- the intensities can by means of
- a speed of the textile material s can be determined by in the
- the device according to the invention for detecting a periodic structure in a moving elongate textile material comprises a substrate having a plurality of discrete detection points arranged along the longitudinal direction of the textile material and equidistantly spaced from each other for the simultaneous optical scanning of the
- An optical waveguide structure integrated on a substrate is understood in this document to mean a waveguide structure which is monolithically housed in or on the substrate.
- the waveguide structure was originally produced on the substrate, for example by technologies such as photolithography and / or doping - in contrast to
- the integrated optical waveguide structure is inseparably connected to the substrate. It includes a plurality of transparent dielectric layers with different refractive indices. Preferably, a core layer with a higher refractive index is embedded between a lower layer and an upper layer with lower refractive indices, so that light waves can be conducted in the core layer.
- the waveguide structure can be strip waveguides that conduct light in one direction and / or planar
- Thin-film conductors in which light can propagate in two directions include.
- they may include other passive and / or active integrated-optical components such as lenses, beam splitters, reflectors, filters, amplifiers, light sources and / or light receivers.
- the optical waveguide structure is preferably formed such that in
- the optical waveguide structure may have at least one branch with at least two branches.
- the optical waveguide structure may include at least one waveguide for guiding light to the detection sites.
- the detection sites are preferably provided with at least one converging lens.
- the decoupling interface can be designed to connect the waveguide structure to an optical connector. It is advantageous if the
- Decoupling interface is attached to an edge of the substrate.
- the substrate In a preferred embodiment, several groups of a plurality of discrete detection sites are arranged on the substrate. The detection sites are within each group equidistant, the equidi punching of the various
- the optical waveguide structure is for combining light portions detected in each group and guiding the individual ones merged light components formed to a decoupling interface.
- the number of groups is, for example, between 2 and 50, preferably between 5 and 20.
- UV ultraviolet
- IR infrared
- Figures 1 and 2 show schematically two different embodiments of a device according to the invention in plan views.
- FIG. 3 shows schematically an arrangement of detection waveguides
- FIG. 4 schematically shows two possibilities for the arrangement of
- FIG. 5 schematically shows two different textile materials in FIG.
- FIG. 6 shows (a), (b) possible time profiles of output signals of a
- FIG. 7 shows a local spectrum obtained according to the invention
- FIG. 8 schematically shows one end of an optical waveguide, one to
- FIG. 9 shows schematically a further embodiment of a
- FIG. 1 shows a first embodiment of a device 1 according to the invention.
- the device 1 serves to test an elongated textile material 9, for example a yarn, which is moved past the device 1 or past the device 1.
- the elongated textile material 9 for example a yarn
- the device 1 comprises a substrate 2 on which a scanning region 3 for optically scanning the textile material 9 is provided.
- the substrate 2 may consist of a known material such as glass, a plastic, a semiconductor material or impregnated with epoxy glass fiber mat. It is preferably flat and rigid, d. H. practically does not deform.
- the longitudinal axis and direction 91 of the textile material 9 lies in the plane of the substrate 2, but outside the substrate 2.
- the scanning region 3 coincides with a part of one side of the rectangular substrate 2, is straight and parallel to
- a plurality of discrete detection points 43.1-43.5 arranged equidistantly along the longitudinal direction 91 of the textile material 9 are disposed in the immediate vicinity of the textile material 9 or its path for optical scanning of the textile material 9.
- the number of detection sites is, for example, between 5 and 500, preferably between 20 and 200.
- On the substrate 2 is an optical waveguide structure 4 for together drove detected at the detection sites 43.1 -43.5 light components and for the management of
- Embodiment of Figure 1 includes the waveguide structure 4 nine optical strip waveguides 41 .1 -41.5, 42.1-42.4.
- the waveguide structure 4 may, for. B. be made of a polymer that is sufficiently permeable to the wavelength of light used. It is preferably applied to the substrate 2 by a process that is illustrative.
- the transverse dimensions (width and height) of a single waveguide 41. 1 - 41 .5, 42. 1 -42.4 can eg. B. between 5 ⁇ and 500 ⁇ , preferably about 50 ⁇ , be.
- the Wellenleitersiraktur 4 may be located on an outermost layer of the substrate 2 or form an inner layer which is covered by at least one overlying layer. In the latter case, the layer above can
- Waveguide structure 4 from mechanical damage, pollution and
- the waveguides 41.1 -41.5, 42.1 -42.4 can be embodied as a single-mode waveguide or as a multimode waveguide.
- the waveguide structure 4 of Figure 1 has a plurality of intersections of waveguides 41 .1 - 41.5, 42.1 -42.4. Care should be taken to avoid crosstalk from one waveguide to another at these intersections.
- the person skilled in the art of integrated optics is able to design the waveguide structure 4 in such a way that this condition is well met. This may be the case in particular if the respective crossing angle is close to 90 ° or at least not too acute.
- the waveguide turret 4 of FIG. 1 has branches, for example Y-branches.
- the branches can be designed as per se known Verzweigerbaumaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschinemaschine
- Intersections and branches may include the optical waveguide structure 4 further integrated-optical components. These can be passive and / or active. Examples of such integrated-optical components are lenses, beam splitters, reflectors, filters,
- Amplifiers, light sources and light receivers can be applied to the substrate 2 as discrete, discrete components.
- optical elements such as light sources and / or light receivers can be applied to the substrate 2 as discrete, discrete components.
- light-collecting elements 44 may be mounted as converging lenses to ensure the highest possible light output.
- light emerging from the end of a thin waveguide is radiated at a large aperture angle: in time reversal, therefore, light from the same large aperture angle is also coupled into the waveguide.
- the textile material to be tested 9 usually has a small diameter of less than 1 mm, it would be taken without countermeasures of only a small part of the available light, and of this in turn would only a small part back in coupled to a waveguide.
- the converging lenses 44 serve to avoid such light losses. Their function and structure will be explained in more detail with reference to FIG. Four of the nine waveguides 41.1-41.5, 42.1 -42.4, the following as
- Lighting waveguides 42.1-42.4 are used to illuminate the textile material 9. For this purpose, they receive light from a transmitter module 62 and direct it into the scanning region 3, where it exits the illumination waveguides 42.1-42.4 and at least partially on the textile material 9.
- the transmitter module 62 may be attached to the end of a second electrical line 72. The light transfer from the transmitter module 62 into the illumination waveguides 42.1-42.4 takes place at a
- Einkoppelstrongstelle 52 may, for. B. be designed as a connector.
- Transmitter module 62 includes, for example, in a row juxtaposed light sources 64.1, 64.2.
- the light sources 64 may, for. B. be designed as a diode laser or as light emitting diodes.
- the coupling of the light from the light sources 64.1, 64.2 in the illumination waveguide 42.1-42.4 can by directly illuminating the
- Illuminating waveguide 42.1-42.4 light is not focused on a small point on the fabric 9, but a longer portion of the textile material 9 illuminated. To ensure an effective coupling of the light in the
- Illumination waveguide 42.1-42.4 at the coupling interface 52 it is important that the light sources 64.1. 64.2 be positioned as e akt and stable as possible with respect to the illumination waveguide ends.
- mechanical positioning means 53 for positioning the transmitter module 62 with respect to the substrate 2 are attached to the coupling interface 51.
- the positioning means 53 may, for. B. be designed as a suitable guides that provide accurate positioning within the connector. They are, as well as the other elements, indicated in Figure 1 only schematically.
- Detection Waveguide 41.1 -41.5 designates the light that is transmitted by the
- Detection parts 43.1-43.5 comes to a receiver module 61, which may be attached to the end of a first electrical line 71. The light transfer from the
- Detection waveguides 41.1-41.5 in the receiver module 61 takes place at a
- Decoupling interface 51 which is attached to an edge of the substrate 2.
- Auskoppelitesstelle 51 can also be used as a plug connection with corresponding
- the receiver module 61 includes, for example, in a row juxtaposed light receiver 63.1, 63.2, each of which is assigned to a group of detection waveguides 41.1-41.5.
- the light receiver series can z. B. be designed as a CCD array. It would also be possible to combine a plurality of adjacent reception elements, which then form a "composite light receiver.” With regard to the light extraction and the positioning and design of the coupling-out interface 51, what has been said about the coupling interface 52 applies analogously.
- the branches in the waveguide structure 4 serve to be of a single
- Light source 64.1 divide emitted light and multiple illumination waveguides
- the detected scanning signals are added to a sum signal and. due to temporal changes of the individual summation signals, periodic contributions in the structure of the
- Detection point 43.1, 43.3, 43.5 detected, from each second detection waveguide 41.1,
- 43.1, 43.3, 43.5 form a second group whose equidistance is twice that of the first group.
- the receiver od u 1 61 and the transmitter module 62 are connected via the first electrical line 71 and the second electrical line 72 to an electronic unit 70. On the one hand, this controls the transmitter module 62. On the other hand, the electronic unit 70 receives signals from the receiver module 61, evaluates them themselves or forwards them, possibly after preprocessing, to an evaluation unit (not shown). It is advantageous to optically and mechanically precisely define the coupling-out interface 51 and the coupling-in interface 52 and thus to standardize it as it were. Then, the receiving module 61 and the transmitter module 62 with their relatively expensive optoelectronic components can be used without changes for different substrates 2. On the other hand, the relatively inexpensive substrates 2 with their integrated optical
- Waveguide structures 4 are replaced as needed. A need for
- Replacement of a substrate 2 can, for. B. arise when another
- Waveguide structure 4 - especially when scanning 3 - is needed or if a substrate 2 is damaged by wear or otherwise defective.
- the erfmdungsgemässe device 1 is preferably housed in a housing, as it is known, for example, from US 5,768,938 A. For clarity, such a housing was not shown in the accompanying drawings.
- FIG. 2 shows a second embodiment of the device 1 according to the invention. This is simplified compared to the first embodiment of FIG. 1 in the sense that two waveguide ends facing the scanning region 3 serve both for illumination and for detection.
- the corresponding converging lenses 44 must be designed as a compromise so that the illumination light illuminates as long as possible a portion of the textile material 9 and the detection light of as short as possible
- Section of the textile material 9 comes.
- the branches are designed so that a large part of the light emitted by the light source 64 is emitted into the scanning region 3, and that a large part of the light received by the scanning region 3 is supplied to the light receivers 63.1, 63.2.
- the expert in the field of integrated optics is able to produce such branches with knowledge of the invention.
- only a single optical interface 55 is present, which serves both as Einkoppel- as well as decoupling interface.
- the corresponding transmitter and receiver module 65 are thus both two light receivers 63.1, 63.2 and a light source 64th
- FIG. 3 shows a third embodiment of the device 1 according to the invention, wherein, for the sake of simplicity, only a few important optical elements, namely the
- Detection points 43.1-43.7 with the converging lenses 44, the detection waveguide 41.1-41.7 of the waveguide structure 4 and the light receiver 63.1 -63.3 at the decoupling interface 51, are shown.
- Other elements such as illumination waveguide, substrate, transmitter and receiver module, etc., can be configured analogously as in Figures 1 and 2 or otherwise.
- the embodiment of Figure 3 has z. B. three light receiver 63.1 - 63.3.
- the waveguide structure 4 with its branches is designed such that the following functions are realized:
- a first light receiver 63.1 is supplied with the sum of light components detected at all detection points 43.1-43.7. These detection sites 43.1-43.7 form a first group.
- a second light receiver 63.2 becomes the sum of every second
- a third light receiver 63.3 becomes the sum of every third
- Detection point 43.1, 43.4, 43.7 supplied detected light components. These detection sites 43.1, 43.4, 43.7 form a third group.
- FIG. 3 illustrates an important aspect of the invention: several groups of a plurality of discrete detection sites are provided, the detection sites within each cluster being equidistant and the aquidistances of the different groups being different. In each group, the detected scanning signals are added to a sum signal.
- the receivers 63.1-63.3 output signals from which a spatial frequency spectrum of the structure of the textile material can be determined in a simple manner. If a is the constant distance (equidistance) of two detection points 43.1, 43.2 along the longitudinal axis 91 of the textile material 9, then it is possible to use the apparatus 1 according to the invention as sketched in FIG. 3 (or with its generalization with more than three groups ), the spatial frequencies 1 / a, 1 / (2a), l / (3a), ... determine. In this spatial frequency sequence, the intervals decrease monotonically.
- Such a non-arithmetic spatial frequency sequence may be advantageous because its members are rarely integer multiples of another member and thus higher Hannonians do not produce unwanted artifacts. This condition is fulfilled even better, and moreover approximates an arithmetic sequence, if only higher terms are taken into account, e.g. 1 / (1a), l / (12a), 1 / (13a), ...
- the equidistance a is, for example, between 0.1 mm and 10 mm.
- the schematic side views of elongate textile materials 9, eg yarns, of FIG. 5 will be used below to better explain the invention.
- the textile material 9 of Figure 5 (a) has a pronounced periodic structure with a location period P.
- a diameter of the textile material 9 may change periodically with the longitudinal position.
- no location period can be recognized.
- the light intensity detected at a detection point is a measure of the diameter of the
- Textile material 9 Upon detection of light incident on one (as compared with the
- Section of the textile material 9 was transmitted past, the detected
- Light intensity is an inverse measure of the diameter of the fabric 9, d. H. the smaller, the larger the diameter.
- Figure 6 (a) shows a possible course of an output signal of a light receiver 63.1, as it z. B. located in Figure 3, compared to the time t. If the location period P of the textile material 9 (see FIG. 5 (a)) coincides with the aquidistance a of two detection sites 43.1, 43.2 and the speed of movement of the textile material 9 is constant, the output signal is temporally periodic with a time period T. In FIG. 6 (a ) output signal has in addition to a periodic alternating component of the amplitude AS a DC component S 0 . This DC component can thus be eliminated by a differential arrangement of detection sites as disclosed in EP-A-1 553 377.
- Device 1 provides in a simple manner a Fourier spectrum of the structure of the textile material 9.
- the direct component So of the output signal according to FIG. 6 (a) can also be eliminated in a different way than with a differential arrangement of detection sites, for example by subtracting a current one Mean value of the output signal.
- a maximum value formation or a similar operation can be used, which is a measure of the amplitudes AS of the signals according to FIGS. 6 (a) or 6 (b).
- the mentioned operations such as subtraction, rectification, integration or maximum value formation can be carried out with analog and / or digital means; Both types of means and the corresponding signal transducers are well known today.
- Such agents may, for. B. in the illustrated in Figures 1 and 2
- Electronic unit 70 and / or in a connected to the electronic unit 70
- FIG. 7 shows a location spectrum, as may result from the method according to the invention or the device 1 according to the invention. It is assumed that a device 1 with ten light receivers, which in each case a column 8. 1 - 8.10 of the diagram is assigned, for. For example, according to the following rules:
- the light is supplied from all existing detection sites. It thus corresponds to the shortest local period P
- a second column 8.2 corresponds to the second shortest detectable in the textile material
- Period P 2 (ie, their second largest spatial frequency).
- the height S * of a column 8.1 -8.10 is a measure of the amplitude AS of the light intensity received by the respective light receiver; she can z. B. correspond to the integral value described above.
- the column heights are preferably converted to normalized values, taking into account that with homogeneous illumination of all
- Place period P «P 6 has; see. FIG. 5 (a). If necessary, with appropriate statistical methods known to those skilled in the art, taking into account the finite heights of the adjacent columns 8.4-8.8, the location period P can be determined even more accurately. There may be textile materials 9, in which the inventive method provides two or more different spatial periods or spatial frequencies. For others
- FIG. 7 The diagram shown in FIG. 7, or a similar diagram, will become apparent from FIGS.
- Sum signals preferably automatically calculated and displayed on a (not shown) output unit of the inventive device, for example.
- a screen for example.
- a speed of the textile material 9 in the direction of movement 91 can be determined.
- a speed measurement is possible even if no maximum is found in the location spectrum.
- a predominant time frequency f is determined in the sum signal, which belongs to this group of detection sites.
- the speed v is calculated according to the above formula.
- FIG. 8 An end of a waveguide 41 integrated on a substrate 2 facing the scanning region 3 is shown schematically in FIG. 8 in a greatly enlarged manner. It does not matter whether it is a lighting fiber or a
- Detection waveguide acts because the two cases merge into each other by time reversal.
- the waveguide end is provided with a converging lens 44.
- the condenser lens 44 may be made from the waveguide end itself, glued to it directly, or spaced therefrom. It is designed and arranged in such a way that it lets as much light 31 emerging from the waveguide 41 impinge on the textile material 9 or couples as much light 31 coming from the textile material 9 into the waveguide 41 as possible.
- What is shown schematically in FIG. 8 as a single converging lens 44 can in practice be embodied as a lens system.
- the expert in the field of technical optics is in the knowledge of the invention able to determine a suitable arrangement for the purpose and use.
- FIG. 9 shows a ninth embodiment of the device 1 according to the invention, in which the longitudinal axis 91 of the textile material 9 lies parallel to the plane of the substrate 2, but is spaced therefrom. Thus, the textile material 9 is moved over the substrate 2 along the longitudinal direction 91 of the textile material 9.
- Scanning region 3 is in or above the plane of the substrate 2.
- the cut parts by means of a lighting waveguide 42 from a coupling 52 is guided to the scanning 3, is coupled out in the scanning area 3 to the textile material 9 out.
- the textile material 9 After interaction with the textile material 9, for example, reflection and / or scattering on the same, at least part of this light is coupled into detection waveguides 41 .1 -41 .3 and from these to coupling-out interfaces 51 .1. 51 .2 guided.
- optical Coupling elements 45 is required, which can couple light out of the plane of the substrate 2 or from the outside into a waveguide 41.2-41.3 integrated on the substrate 2.
- Such coupling elements 45 are known per se and need not be discussed further here.
- the coupling elements 45 may additionally be equipped with converging lenses and other optical components.
- Lines and electronics unit are not shown in Figure 9 for the sake of simplicity; but they can be the same or similar as in Figures 1 or 2 executed.
- the scanning at the detection sites may be optical, electrical and / or based on another physical principle. Not shown here
- Embodiments may instead of or in addition to the optical waveguide structure 4 on the substrate 2 be integrated electrical circuits, as are known in the art of electronics.
- Such circuits may include passive and / or active electrical components in addition to electrical interconnects. Examples of such electrical components are resistors, capacitors, coils, transistors, filters and amplifiers.
- Even complex components such as microprocessors may be located on the substrate 2, which are preferably applied as integrated circuits in a separate housing on the substrate 2.
- the electrical conductor tracks can open into the scanning region 3, wherein the openings are preferably provided with electrodes.
- Electrodes serve to generate and / or detect an electric field, preferably an alternating electric field, in the scanning region 3.
- the electrical testing of the textile material 9 is based on detecting the effects of the textile material 9 on the electric field and on it to eat physical properties of the textile material 9 to sch Ii.
- the capacitive testing of textile material 9 is well known in the prior art.
- the device 1 according to the invention can be equipped with an electrical interface and an electrical connection part.
- the electrical interface can be designed as a plug connection, as they are well known from electronics and available on the market.
- both an optical waveguide structure and an electrical conductor structure on be integrated with the same substrate 2, wherein both structures open at least partially into the scanning region 3.
- the fabric 9 optionally optically, electrically or both visually and electrically to examine.
- Light sources, light receivers, waveguides, detection sites, waveguide ends, lenses, etc. is by no means to be understood as limiting.
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- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Pathology (AREA)
- Materials Engineering (AREA)
- Quality & Reliability (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Treatment Of Fiber Materials (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
- Optical Integrated Circuits (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/647,581 US20150308036A1 (en) | 2012-12-10 | 2013-12-02 | Detection Of A Periodic Structure In A Moving Elongated Textile Material |
JP2015545614A JP2016500439A (ja) | 2012-12-10 | 2013-12-02 | 移動する長繊維材料における周期構造の検出 |
CN201380064303.3A CN105308440A (zh) | 2012-12-10 | 2013-12-02 | 在移动伸长织物材料中的周期性结构的检测 |
EP13802857.6A EP2929330A2 (de) | 2012-12-10 | 2013-12-02 | Erkennung einer periodischen struktur in einem bewegten länglichen textilmaterial |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH2740/12 | 2012-12-10 | ||
CH27402012 | 2012-12-10 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2014089714A2 true WO2014089714A2 (de) | 2014-06-19 |
WO2014089714A3 WO2014089714A3 (de) | 2014-08-07 |
Family
ID=49758947
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CH2013/000210 WO2014089714A2 (de) | 2012-12-10 | 2013-12-02 | Erkennung einer periodischen struktur in einem bewegten länglichen textilmaterial |
Country Status (5)
Country | Link |
---|---|
US (1) | US20150308036A1 (de) |
EP (1) | EP2929330A2 (de) |
JP (1) | JP2016500439A (de) |
CN (1) | CN105308440A (de) |
WO (1) | WO2014089714A2 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105572143A (zh) * | 2015-12-17 | 2016-05-11 | 湖北第二师范学院 | 压延过程中压延材料表面周期性缺陷的检测方法 |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3748343B1 (de) * | 2019-06-06 | 2022-08-17 | Gebrüder Loepfe AG | Optische sensorvorrichtung zur detektion von fremdstoffen in einem länglichen textilen körper |
CN110376203A (zh) * | 2019-06-26 | 2019-10-25 | 阳程科技股份有限公司 | 玻璃纤维丝检测机台及其检测方法 |
JP2023092142A (ja) * | 2021-12-21 | 2023-07-03 | ソニーセミコンダクタソリューションズ株式会社 | 光検出装置、および測距装置 |
CN117470803B (zh) * | 2023-10-30 | 2024-04-26 | 无锡迅杰光远科技有限公司 | 筒纱用的手持式近红外检测设备及检测方法 |
Citations (9)
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EP0144502A2 (de) * | 1983-10-04 | 1985-06-19 | Zellweger Uster Ag | Optisches Messorgan für die Querschnittsmessung textiler Garne, sowie Verwendung desselben |
WO1993013407A1 (de) * | 1991-12-20 | 1993-07-08 | Siegfried Peyer Ag | Fremdfasererkennung in garnen |
WO1998008080A1 (de) * | 1996-08-20 | 1998-02-26 | Zellweger Luwa Ag | Verfahren und vorrichtung zur erkennung von fehlern in textilen flächengebilden |
EP1229323A1 (de) * | 2001-02-05 | 2002-08-07 | Rieter CZ a.s. | Verfahren und Vorrichtung zur Detektion von Fremdfasern in einem Garn |
EP1553037A1 (de) * | 2004-01-06 | 2005-07-13 | Murata Kikai Kabushiki Kaisha | Aufwickelvorrichtung für gesponnenes Garn |
EP2090538A2 (de) * | 2008-02-14 | 2009-08-19 | Murata Machinery, Ltd. | Garnqualitätmessinstrument und Garnwickelmaschine |
WO2010000078A1 (de) * | 2008-07-02 | 2010-01-07 | Uster Technologies Ag | Vorrichtung zur erfassung von parametern an einem fadenförmigen prüfgut |
EP2423144A2 (de) * | 2010-08-31 | 2012-02-29 | Murata Machinery, Ltd. | Vorrichtung zur Erfassung von Garnstreckeninformationen und Garnwickelmaschine |
WO2012051730A1 (en) * | 2010-10-19 | 2012-04-26 | Uster Technologies Ag | Yarn clearer and method for clearing yarn |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2611611B2 (ja) * | 1992-10-16 | 1997-05-21 | 村田機械株式会社 | 糸ムラ情報解析装置 |
WO1999053315A1 (en) * | 1998-04-14 | 1999-10-21 | E.I. Du Pont De Nemours And Company | Yarn sensor |
-
2013
- 2013-12-02 US US14/647,581 patent/US20150308036A1/en not_active Abandoned
- 2013-12-02 WO PCT/CH2013/000210 patent/WO2014089714A2/de active Application Filing
- 2013-12-02 EP EP13802857.6A patent/EP2929330A2/de not_active Withdrawn
- 2013-12-02 CN CN201380064303.3A patent/CN105308440A/zh active Pending
- 2013-12-02 JP JP2015545614A patent/JP2016500439A/ja active Pending
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0144502A2 (de) * | 1983-10-04 | 1985-06-19 | Zellweger Uster Ag | Optisches Messorgan für die Querschnittsmessung textiler Garne, sowie Verwendung desselben |
WO1993013407A1 (de) * | 1991-12-20 | 1993-07-08 | Siegfried Peyer Ag | Fremdfasererkennung in garnen |
WO1998008080A1 (de) * | 1996-08-20 | 1998-02-26 | Zellweger Luwa Ag | Verfahren und vorrichtung zur erkennung von fehlern in textilen flächengebilden |
EP1229323A1 (de) * | 2001-02-05 | 2002-08-07 | Rieter CZ a.s. | Verfahren und Vorrichtung zur Detektion von Fremdfasern in einem Garn |
EP1553037A1 (de) * | 2004-01-06 | 2005-07-13 | Murata Kikai Kabushiki Kaisha | Aufwickelvorrichtung für gesponnenes Garn |
EP2090538A2 (de) * | 2008-02-14 | 2009-08-19 | Murata Machinery, Ltd. | Garnqualitätmessinstrument und Garnwickelmaschine |
WO2010000078A1 (de) * | 2008-07-02 | 2010-01-07 | Uster Technologies Ag | Vorrichtung zur erfassung von parametern an einem fadenförmigen prüfgut |
EP2423144A2 (de) * | 2010-08-31 | 2012-02-29 | Murata Machinery, Ltd. | Vorrichtung zur Erfassung von Garnstreckeninformationen und Garnwickelmaschine |
WO2012051730A1 (en) * | 2010-10-19 | 2012-04-26 | Uster Technologies Ag | Yarn clearer and method for clearing yarn |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105572143A (zh) * | 2015-12-17 | 2016-05-11 | 湖北第二师范学院 | 压延过程中压延材料表面周期性缺陷的检测方法 |
Also Published As
Publication number | Publication date |
---|---|
WO2014089714A3 (de) | 2014-08-07 |
JP2016500439A (ja) | 2016-01-12 |
CN105308440A (zh) | 2016-02-03 |
US20150308036A1 (en) | 2015-10-29 |
EP2929330A2 (de) | 2015-10-14 |
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