FR2601780A1 - DEVICE FOR AUTOMATICALLY DETECTING THE CHARACTERISTIC SIZES OF A TEXTILE SAMPLE, SUCH AS WIRES, HOLES AND RIBBONS - Google Patents

Abstract

THE INVENTION CONCERNS A DEVICE FOR THE AUTOMATIC DETERMINATION OF SIZE CHARACTERISTICS OF A TEXTILE SAMPLE, WITH A MEASUREMENT UNIT CONTAINING A MEASURING UNIT AND A GUIDING SYSTEM AS WELL AS A SAMPLE ADVANCE SYSTEM, WITH A UNIT OF EVALUATION AND AN OUTPUT UNIT OF THE SIZES OBTAINED CHARACTERISTICS. ACCORDING TO THE INVENTION, THE MEASURING UNIT 1 HAS A MODULAR CONSTRUCTION, A SEPARATE MODULE 5, 8, 4 6 IS PROVIDED FOR THE MEASURING BODY 15, FOR THE GUIDING SYSTEM 14 AND FOR THE ADVANCE SYSTEM 16, AND THESE MODULES MAY BE ARRANGED IN DESIRED SUCCESSION RELATING TO THE UNIT OF MEASUREMENT. THE INVENTION APPLIES IN PARTICULAR TO THE MEASUREMENT OF YARNS, WICKS AND RIBBONS IN DISCONTINUOUS OR CONTINUOUS FIBERS.

Description

The present invention relates to a device for determining

  automatic measurement of the characteristic quantities of a textile sample, such as threads, rovings and ribbons, with a measuring unit containing a measuring element and a guiding system as well as a sample advance system, and a unit of measurement. evaluation and a unit of

  output of the characteristic quantities obtained.

  In the laboratories of the textile industry, preferentially spinning mills, sampling checks are carried out in the context of factory quality control for the determination of specific textile parameters, such as, for example, weight variations, hair abundance, tensile strength, fineness, torsion and so on. For the determination of weight variations, uniformity checkers are used, such as for example sold worldwide by the applicant of the present invention under the designation USTER TESTER (USTER being the

  registered trademark of Zellweger Uster AG).

  These uniformity checkers are the same for artificial and continuous yarns, with respect to the evaluation and output unit, but different for the unit of measurement. Not only is the measuring member, which for example is a capacitive measuring member 25, different, but the feed system is arranged, with reference to the path of the wire, after the measuring member in the case of wires. artificial fibers and front in the case of continuous yarns. On the other hand, in the case of uniformity testers for continuous threads, a special suction nozzle is necessary which gives the threads the necessary twist for the examination. This leads to the fact that, for continuous yarns and artificial or staple fiber yarns, various measuring units are required which is disadvantageous for the manufacturer as well.

  of the device only for its user.

  The present invention relates to a

  device of the type mentioned above, which avoids O10 this dual path and no longer requires a particular unit of measurement for continuous son and discontinuous son.

  According to the invention, this task is solved by the fact that the measuring unit has a modular construction, a separate module being provided for the measuring device, for the guidance system and for the feed and feed system. these modules can be arranged, in a suite

  desired, relative to the unit of measurement.

  By the modular construction of the measuring unit according to the invention, the necessary modules can, on the one hand, be collected by the manufacturer of the apparatus in the desired measurement unit. It is no longer necessary to produce various units of measurement, and secondly the customer must no longer buy various units of measurement, having identical floors, but he simply

  need the necessary modules, which he can gather himself according to his wish and according to the concrete case of use.

  If, in addition to variations in weight, another parameter is to be measured, for example, the abundance of bristles, a second device is required, and two examination processes are necessary. But the evaluation of the signals of the unit of measurement in the evaluation unit is very similar and in the case of a digital signal processing, the expense is reduced, for example, to an additional printed circuit board for the evaluation unit, therefore, for the determination of weight variations and pile abundance, a common evaluation and output unit, to which the various units of measurement are connected, can be used. If, in the evaluation unit, the signal processing is not simultaneous but consecutive, it is not necessary to provide this additional printed circuit board. Another advantageous configuration of the device according to the invention relates to another simplification of the

  last mentioned case of use for determination.

  various parameters of the sample.

  This other configuration is characterized in that, in the sample path, at least two measuring devices of modular construction are arranged for the determination of various characteristic quantities.

of the sample.

  This allows the measurement of several sample parameters using a single measurement system and with a single sample pass. At the base, the system 20 is designed so that the signals of three measuring devices can be simultaneously processed and an extension

  to more than three measuring devices is possible.

  The invention will be better understood, and others

  goals, features, details and benefits of it will become more apparent in the description

  following explanatory diagram with reference to the accompanying schematic drawings given solely by way of example illustrating several embodiments of the invention and in which: - Figure 1 is a perspective view of a uniformity checker for determining weight variations of staple fiber yarns; FIG. 2 shows a variant of the examination device of FIG. 1, with a unit of measurement for the determination of weight variations and pile abundance of staple fiber yarns; and - Figure 3 shows a variant of the device

  of FIG. 1, with a unit of measurement for determining the weight variations of continuous filaments.

  The uniformity checker shown in FIG. 1 for the determination of the weight variations of a textile article, such as yarns, tows or ribbons, made of staple fibers, consists, as can be seen, of a unit of measurement 1, an evaluation unit 2 and 10 of an output unit * 3 and a frame 13 for the presentation units with the sample, that is to say

  for example, reels of wire or wick.

  The unit of measurement 1 for the sample designated by the reference P, consists, as can be seen, of several modules which are arranged as follows, in the direction of travel of the sample P, that is to say in the figure, from the top to the bottom: firstly, a module 4 with a system 14 for guiding the wire, for example a wire brake, then a module 5 with a measuring member 15, then a module 6 with an advance system 16 and then a module 7 with a suction nozzle 17. The lowest module 7 is placed on a base 10 and all indicated modules 4, 5, 6 and 7 and the base 10 are arranged

  in a frame 11 and held by it. The frame 11 has an upper part 19 in the form of a stirrup.

  The measuring member 15 through which the sample P is drawn by means of a feed system 16 formed

  of two rollers, is a capacitive measuring device. This is described in US Pat. Nos. 3,754,172, 3,788,138 and 3,805,607 to which reference may be made.

  The advance system 16 and the suction nozzle 17 are known from USTER TESTER already named, and will not be more

amply described here.

  The evaluation unit 2 contains, inter alia, an analog-digital converter and a computer and is combined, as can be seen, with a screen 12. The electrical signals constantly produced by the measuring member 15 are processed by the computer of the evaluation unit 2 and stored, in a suitable form, in a memory integrated in the evaluation unit 2 and can, before printing on the printer forming the evaluation unit 3, be represented on the screen 12. This

  This has the advantage that all the data produced on the screen 12 can be indicated beforehand and only the data chosen to be fixed on the printer 3.

  It should further be pointed out that the signal processing in the evaluation unit 2 consists of three main components, ie the spectrograph for the spectrogram (wavelength spectrum of the weight variations), the imperfections indicator, which counts the exceedances of the weight limit values and the actual evaluation room for the determination of the coefficients

  of variation and the curve of variation of length.

  All these characteristic quantities are known from the already named USTER 20 TESTER. The precise construction of the evaluation unit 2 is however not essential in the context of the present invention, particularly if it is considered that in the case of an analysis and an evaluation

  digital, the corresponding function can be undertaken by a single printed circuit board.

  If, in addition to the weight variations of the sample P, another parameter, for example its hair abundance, has to be determined, up to now it was necessary for this purpose to use a separate device with a measurement unit. of evaluation and output and thus two complete measuring devices and two complete test processes were needed. Although it is at least thinkable to connect the two necessary measurement units to a common evaluation and output unit, this requires

  always two units of measurement and two review processes.

  These disadvantages no longer exist in the case of the unit

  measuring 1 'shown in Figure 2.

  According to FIG. 2, for the examination of the variations in weight and the abundance of bristles of the sample P, a single unit of measurement 1 'is used, which is possible thanks to the modular construction of the unit measuring unit, described with reference to FIG. 1. In this combined measuring unit 1 ', for the examination of the variations in weight and the abundance of hairs, in comparison with the measuring unit 1' of the 1, a module 8 with a measuring member 18 for the abundance of bristles of the sample P is placed between the module 4 with the yarn guiding system 14 and the module-5 with the measuring member 5 of the variations weight. The measuring member 18 will not be further described here; From this point of view, reference can be made to A. Barella's article "Yarn Hairiness" in Textil Progress, Volume 13, Number 1, The Textile Institute, and to Swiss Patent Application NI 05,370 / 85-0 of the plaintiff of this application. The evaluation and analysis of the signals of the measuring member 18 is very similar to that of the measuring member 15 and can be analog or digital. It is possible to perform the signal processing of the two measuring elements 15 and 18 in the evaluation unit 2 (FIG. 1) either in time division (time division multiplexing method) or else it is possible to equip the evaluation unit 2 (FIG. 1) of a set of printed cards for each measuring member. Only a simple

  Control function is required.

  The additional module 8 can easily be placed in the frame 11 by removing the

  upper part 19 stirrup-shaped (Figure 1) which is replaced by a higher upper part 19 'stirrup-shaped. It is also possible to configure the adjustable frame 11 or to use frames of various sizes.

  The base 10 contains the electronics of the measurement unit 1

  and is the same for all embodiments.

  Fig. 3 shows the measuring unit 1 "of an examination device for determining the weight variations of continuous filaments, which differs in three points with respect to the examination device shown in Fig. staple fiber yarns:

  Another measuring member 15 'is necessary.

  But this one is also a capacitive organ of measurement. The advance system 16 must be arranged, in the direction of travel of the sample P, in front of the organ

measuring 15 '.

  A special suction nozzle 19 is required which gives the continuous threads the twist necessary for the examination. With regard to this suction bus, one

  can refer to US Patent No. 3,951,321.

  According to Figure 3, these conditions can be fulfilled in a simple way thanks to the modular construction of the measuring unit 1. It can be seen that the measuring unit 1 "consists of four modules, which are arranged, in the direction of travel of the sample P, to the following succession: Module 4 with wire guiding system 14, Module 6 with feed system 16, Module 5 'with measuring element 15',

Module 9 with suction nozzle 19.

  Below the first module 19 is provided, as in the case of FIGS. 1 and 2, the base 10, which is arranged with the various modules, in a frame 11. The described modular construction of the measuring unit 1, 1 '1' allows a desired combination of the type and sequence of modules and makes possible on the one hand a reduction in equipment costs because several test devices are no longer needed, but on the contrary by means of various modules, the unit of measurement can be adapted to a particular test device according to changes in requirements, and secondly, a reduction of time, because several measures

  can be accomplished in a single review process.

  Even if, in the present description, only one measuring device is mentioned for the variations of weight and one for the abundance of bristles, other modules with an organ

  of measurement can of course be used for the most diverse parameters. For example, the additional determination of the average fineness and the coefficient of variation of the fineness can be indicated in DE-OS 34 02 181

(U.S. Patent Application No. 671,411).

Claims (8)

R EVENDICATIONS   1. Apparatus for the automatic determination of characteristic quantities of a textile sample, such as threads, rovings and ribbons, with a measuring unit containing a measuring member and a guiding system as well as a measuring system advancing the sample, with an evaluation unit and with an output unit of the characteristic values obtained, characterized in that the measuring unit (1, 1 ', 1 ") has a modular construction, and for the measuring member (15, 15 ', 18), for the guiding system (14) and for the feeding system (16) is provided a separate module (5, 5', 8; 4; 6), and said modules can be assembled in desired succession relative to the unit of measurement.   2.- Device according to claim 1, characterized in that in the course of the sample, at least two measuring members (15, 18) of modular construction are arranged, for the determination of various characteristic quantities of the sample P 3.- Device according to claim 2, characterized in that the evaluation unit (2) has, for each measuring member (15, 18), a separate signal processing stage, advantageously for each a printed circuit board or a set of printed cards. 4.- Device according to any one of   1 or 2, characterized in that the unit of   measuring (1, 1 ') has another module (7) with a first suction nozzle (17) of the sample (P).   5.- Device according to claim 4, characterized in that the various modules (4, 5, 5 ', 6, 7, 8, 9) are retained, exchangeably, in a frame of the stirrup type (11).   6.- Device according to claim 5, characterized in that in the frame (11) is maintained a base (10) may optionally be exchanged by a other module (8).   7.- Device according to any one of   Claims 1 or 5, characterized in that the measuring unit (1) has, in the case of determining variations in the weight of yarns, rovings and ribbons, of fibers   discontinuous, in the direction of travel-of the sample (P), the following modules: a guide module (4) with the guiding system (14), a measuring module (5) with the measuring member ( 15), an advance module (6) with the feed system (16) and a suction module (7) with   the first suction nozzle (17).   8.- Device according to any one of   Claims 1 to 5, characterized in that the unit of   measure (1 '), in the case of using for the determination of the hair abundance of the sample (P), in the direction of its travel, the following modules: a guide module (4) with the guiding system (14), a measuring module (8) with the measuring device (18) for the abundance of bristles, an advance module (6) with the feed system (16) and a suction module (7) with   the first suction nozzle (17).   9.- Device according to any one of   claims 2, 7 or 8, characterized in that the unit   In the case of use for the determination of weight variations and the abundance of bristles of staple fiber yarns, the measuring unit (1 ') is equipped between the guiding module (4) and the d module. advance (6), the measuring module (8) of the abundance of bristles and the module   measuring (5) weight variations.   10.- Device according to any one of   1 or 5, characterized in that the unit of   measurement (1 "), in the case of the use for the determination of the variations of weights of continuous threads, presents, in the direction of travel of the sample (P), the following modules: a guide module (4) with the guiding system (14), an advance module (6) with the feed system (16), a measuring module (5 ') with the measuring member (15) and a suction module and torsion device (9) with a second suction nozzle (19) which   the sample, the twist required for the examination.