1、BS EN ISO 19076:2016Leather Measurementof leather surface Usingelectronic techniques(ISO 19076:2016)BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06BS EN ISO 19076:2016 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO19076:201
2、6.The UK participation in its preparation was entrusted to TechnicalCommittee TCI/69, Footwear, leather and coated fabrics.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a co
3、ntract. Users are responsible for its correctapplication. The British Standards Institution 2016.Published by BSI Standards Limited 2016ISBN 978 0 580 83037 2ICS 59.140.30Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the aut
4、hority of theStandards Policy and Strategy Committee on 30 September 2016.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 19076 August 2016 ICS 59.140.30 English Version Leather - Measurement of leather surface - Usin
5、g electronic techniques (ISO 19076:2016) Cuir - Mesurage de la surface du cuir - Utilisation de techniques lectroniques (ISO 19076:2016) Leder - Messung der Oberflche des Leders - Elektronische Verfahren (ISO 19076:2016) This European Standard was approved by CEN on 30 July 2016. CEN members are bou
6、nd to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the C
7、EN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre
8、has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
9、Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey andUnited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Br
10、ussels 2016 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 19076:2016 EBS EN ISO 19076:2016EN ISO 19076:2016 (E) 3 European foreword This document (EN ISO 19076:2016) has been prepared by Technical Committee IULTCS “Internatio
11、nal Union of Leather Technologists and Chemists Societies” in collaboration with Technical Committee CEN/TC 289 “Leather” the secretariat of which is held by UNI. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at
12、 the latest by February 2017, and conflicting national standards shall be withdrawn at the latest by February 2017. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying a
13、ny or all such patent rights. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Repu
14、blic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 19076:2016 has been ap
15、proved by CEN as EN ISO 19076:2016 without any modification. BS EN ISO 19076:2016ISO 19076:2016(E)IULTCS/IUP 58:2016(E)Foreword ivIntroduction v1 Scope . 12 Normative references 13 Terms and definitions . 14 Principle 15 Apparatus and materials 15.1 Measuring machine . 15.1.1 Machine design types 15
16、.1.2 Type A, B, and C measuring machines . 25.1.3 Type D measuring machine 25.2 Reference calibrated templates for machine verification 36 Sampling and conditioning 37 General measurement criteria. 37.1 General requirement 37.2 Leather orientation during measurement 47.2.1 General 47.2.2 Measuring w
17、hole leathers . 47.2.3 Measuring half leathers . 47.2.4 Measuring leather cut pieces 47.3 Measurement operations . 47.3.1 Roller machines 47.3.2 Conveyor machines 47.3.3 Flatbed scanner machines and bi-dimensional static measuring devices . 58 Measurement procedure 59 Calculation and expression of r
18、esults . 610 Test report . 6Annex A (normative) Calibrated templates for the verification of electronic measuring machines . 7Annex B (normative) Procedure for the verification of a measuring machine by calibrated templates . 9Annex C (normative) Laboratory record of calibrated templates .11Annex D
19、(informative) Repeatability and reproducibility 12Bibliography .14 ISO 2016 All rights reserved iiiContents PageBS EN ISO 19076:2016ISO 19076:2016(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work o
20、f preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmenta
21、l, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the IS
22、O/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).Attention is drawn to the possibili
23、ty that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of pat
24、ent declarations received (see www.iso.org/patents).Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as infor
25、mation about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationISO 19076/IUP 58 was prepared by the Physical Test Commission of the International Union of Leather Technologists and Chemists Societies (IUP Commissi
26、on, IULTCS) in collaboration with the European Committee for Standardization (CEN) Technical Committee CEN/TC 289, Leather, the secretariat of which is held by UNI, in accordance with the agreement on technical co-operation between ISO and CEN (Vienna Agreement).IULTCS, originally formed in 1897, is
27、 a world-wide organization of professional leather societies to further the advancement of leather science and technology. IULTCS has three Commissions, which are responsible for establishing international methods for the sampling and testing of leather. ISO recognizes IULTCS as an international sta
28、ndardizing body for the preparation of test methods for leather.IULTCS/IUP 58:2016(E)iv ISO 2016 All rights reservedBS EN ISO 19076:2016ISO 19076:2016(E)IntroductionLeather surface measuring equipment used within the European Union (EU) for legal metrology applications are also subject to the EU Dir
29、ective, 2004/22/EC, on measuring instruments.IULTCS/IUP 58:2016(E) ISO 2016 All rights reserved vBS EN ISO 19076:2016BS EN ISO 19076:2016Leather Measurement of leather surface Using electronic techniques1 ScopeThis International Standard provides a method for the measurement of the surface of leathe
30、r or leather parts by the use of electronic measuring machines.It applies to the measurement of leather (or leather parts) fulfilling the following requirements: flexible leather, finished or unfinished, dry or wet leather; flexibility: such to allow full distension on the measuring line/surface.NOT
31、E For tanned and pressed wet leather, the parties involved agree on the conditioning type. In case of dispute, leather is to be conditioned according to the reference standard conditions in ISO 2419.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in thi
32、s document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 2419, Leather Physical and mechanical tests Sample preparation and conditioningISO
33、2588, Leather Sampling Number of items for a gross sampleEN 15987, Leather Terminology Key definitions for the leather trade3 Terms and definitionsFor the purposes of this document, the terms and definitions given in EN 15987 and the following apply.3.1relative feedmovement of relative translation b
34、etween leather and the system detecting its presence4 PrincipleThe leather surface is measured by means of a measuring device provided with a linear or rectangular array of uniformly-spaced electronic sensors, capable to detect leather presence and to integrate the relevant information (as a sum of
35、elementary rectangular areas). Precision data are available in Annex D.5 Apparatus and materials5.1 Measuring machine5.1.1 Machine design typesThe measuring machines are built according to 4 basic types:INTERNATIONAL STANDARDISO 19076:2016(E)IULTCS/IUP 58:2016(E) ISO 2016 All rights reserved 1BS EN
36、ISO 19076:2016ISO 19076:2016(E)Type A roller machines, where leather passes in front of the sensor array under guidance of a series of free-rotating measuring rollers easing leather spread out by a light pressure on the sensor array, also incorporating the feeding systems.Type B conveyor machines, w
37、here leather is transported under the sensor array by cables or belts mounted before and after the sensors themselves and substantially coplanar with them.NOTE 1 This machine is more suitable for rigid leathers as the leather is transported on cables.Type C flatbed scanning machines, with a horizont
38、al plane surface (flatbed) where leather is laid flat, and a “portal-shaped” frame containing the sensors; the frame is manually or mechanically moved, over and parallel to the flatbed.NOTE 2 This machine type is particularly used to measure the surface of small leathers or pieces of leather.Type D
39、bi-dimensional static measuring devices, based on the capture of a 2-dimension leather image along the normal direction to the leather plane.5.1.2 Type A, B, and C measuring machinesThe measuring machine consists at least of: a base frame; a relative feed system between leather and measuring system;
40、 a set of sensors (sensor array) uniformly spaced along a direction normal to the feeding movement, to detect leather presence; a processing system to integrate signals coming from the sensors array and from the feeding movement sensing, as shown in Clause 4; a numerical indicator (display) of the l
41、eather surface measure, in metric units, with 0,1 dm2resolution with respect to the measured value. As an option, the machine may be equipped with a stamping or printing system to record the surface measured value onto leather or onto a label.The distance i between two adjacent sensors for the detec
42、tion of leather presence shall not be greater than 27 mm across the feeding direction.Let p be the step of the leather presence detection along the feeding direction: the values of i and p shall be such that their product i.p is not greater than 1/400 of the minimum measureable surface.The feeding s
43、peed shall allow leather to spread out adequately during measurement.NOTE 1 The machine is equipped with a feeding speed adjustment device to aid the fulfilment of this condition.NOTE 2 In Type A and Type B machines the feeding speed can affect the spread out of the leather and consequently the meas
44、uring uncertainty.If the machine allows temporary feeding stop (e.g. by manual holding) during measurement, this shall not significantly alter the measuring value.Any feeding inversion, even partial and/or temporary, shall automatically cancel the measure, unless the measuring system allows for the
45、inversion in the area calculation. Such information shall be checked in the instruction manual provided by the machine manufacturer.5.1.3 Type D measuring machineThe measuring machine consists at least of: a base frame; a plane surface to spread and support leather;IULTCS/IUP 58:2016(E)2 ISO 2016 Al
46、l rights reservedBS EN ISO 19076:2016ISO 19076:2016(E) a bi-dimensional image capturing system, with its optical axis normal to the leather surface; a system for image processing and leather surface calculation.The leather surface corresponding to the elementary area measuring unit (pixel) shall not
47、 be greater than 1/400 of the minimum measured surface.EXAMPLE If the image capturing system is able to transfer a (2 m 2 m) area into a (512 512) pixels array, the surface corresponding to 1 pixel (elementary area) is:(2 m/512) (2 m/512) = 0,15 cm2The minimum measurable surface is therefore:400 0,1
48、5 cm2= 60 cm2= 0,60 dm2.5.2 Reference calibrated templates for machine verificationCalibrated templates complying with Annex A requirements, such that the area of the calibrated template is not less than 50 % of the area of the measured leather, or 1,4 m2, whichever is smaller.6 Sampling and conditi
49、oning6.1 Batch sampling shall be according to ISO 2588, unless there is a different agreement between the parties. Label and identify each leather piece making up the batch.6.2 For dry leather, spread out or hang leathers in a standard atmosphere according to ISO 2419, so that air may freely flow on both leather faces (grain and flesh); whenever possible use continuous and fast air circulation. The minimum duration of conditioning is 48 h.In case of wet leather, conditioning shall be agreed between the parties, in order to
