DIN EN 13087-2-2012 Protective helmets - Test methods - Part 2 Shock absorption German version EN 13087-2 2012《防护头盔 试验方法 第2部分 减震性》.pdf

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1、April 2012 Translation by DIN-Sprachendienst.English price group 9No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 1

2、3.340.20!$Uh“1885069www.din.deDDIN EN 13087-2Protective helmets Test methods Part 2: Shock absorptionEnglish translation of DIN EN 13087-2:2012-04Schutzhelme Prfverfahren Teil 2: StodmpfungEnglische bersetzung von DIN EN 13087-2:2012-04Casques de protection Mthodes dessai Partie 2: Absorption des ch

3、ocsTraduction anglaise de DIN EN 13087-2:2012-04SupersedesDIN EN 13087-2:2000-06 andDIN EN 13087-2 Corrigendum1:2002-06www.beuth.deIn case of doubt, the German-language original shall be considered authoritative.Document comprises 14 pages03.12 DIN EN 13087-2:2012-04 2 A comma is used as the decimal

4、 marker. Start of application The start of application of this standard is 1 April 2012. National foreword This standard includes safety requirements. This standard has been prepared by Technical Committee CEN/TC 158 “Head protection” (Secretariat: BSI, United Kingdom). The responsible German body i

5、nvolved in its preparation was the Normenausschuss Persnliche Schutzaus-rstung (Personal Protective Equipment Standards Committee), Working Committee NA 075-01-02 AA Arbeitsschutzhelme. In addition to the legal units of measurement, this standard also uses the acceleration “g” as a unit. It is impor

6、tant to note that according to the German law on units in metrology, the legal units of measurement only are permitted in official or business communications within Germany. Conversion: acceleration g 1 g = 9,80 665 m/s2Amendments This standard differs from DIN EN 13087-2:2000-06 and DIN EN 13087-2

7、Corrigendum 1:2002-06 as follows: a) normative references have been adapted to EN 960:2006 throughout the text; b) the size designations of the headforms have been brought in line with EN 960:2006 (the equivalent code letters according to EN 960:1994 are added in brackets); c) the standard has been

8、editorially revised. Previous editions DIN EN 13087-2: 2000-06 DIN EN 13087-2 Corrigendum 1: 2002-06 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 13087-2 February 2012 ICS 13.340.20 Supersedes EN 13087-2:2000English Version Protective helmets - Test methods - Part 2: Shock absorption Casques

9、 de protection - Mthodes dessai - Partie 2: Absorption des chocs Schutzhelme - Prfverfahren - Teil 2: Stodmpfung This European Standard was approved by CEN on 17 December 2011. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this Eu

10、ropean 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 CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versi

11、ons (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 has the same status as the official versions. CEN members are the national standards bodies of Austria,

12、Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. M

13、anagement Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 13087-2:2012: EEUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGEN 13087-2:20

14、12 (E) 2 Contents Page Foreword 3Introduction .41 Scope 52 Normative references 53 Terms and definitions .54 Prerequisites 55 Test methods 65.1 General 65.2 Falling mass method .65.2.1 Principle 65.2.2 Apparatus .65.2.3 Procedure .75.2.4 Test report 75.3 Falling headform method 75.3.1 Principle 75.3

15、.2 Apparatus .75.3.3 Procedure .95.3.4 Test report 9Annex A (normative) Test results Uncertainty of measurement 10Annex B (informative) Significant technical changes between this European Standard and EN 13087-2:2000 11Annex ZA (informative) Relationship between this European Standard and the Essent

16、ial Requirements of EU Directive 89/686/EEC Personal Protective Equipment 12DIN EN 13087-2:2012-04 EN 13087-2:2012 (E) 3 Foreword This document (EN 13087-2:2012) has been prepared by Technical Committee CEN/TC 158 “Head protection”, the secretariat of which is held by BSI. This European Standard sha

17、ll be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by August 2012, and conflicting national standards shall be withdrawn at the latest by August 2012. Attention is drawn to the possibility that some of the elements of this docum

18、ent may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 13087-2:2000. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Assoc

19、iation, and supports essential requirements of EU Directive(s). For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this document. Annex B provides details of significant technical changes between this European Standard and the previous edition. This Europea

20、n Standard consists of the following ten parts Part 1 : Conditions and conditioning; Part 2 : Shock absorption; Part 3 : Resistance to penetration; Part 4 : Retention system effectiveness; Part 5 : Retention system strength; Part 6 : Field of vision; Part 7 : Flame resistance; Part 8 : Electrical pr

21、operties; Part 9 : Mechanical rigidity1; Part 10 : Resistance to radiant heat. 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

22、, Denmark, Estonia, Finland, 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. 1To be published. DIN EN 13087-2:2012-04 EN 130

23、87-2:2012 (E) 4 Introduction This European Standard is intended as a supplement to the specific product standards for protective helmets (helmet standards). This method or other test methods may be applicable to complete helmets or parts thereof, and may be referenced in the appropriate helmet stand

24、ards. Performance requirements are given in the appropriate helmet standard, as are such prerequisites as the number of samples, preconditioning, preparation of samples for the tests, sequence and duration of testing and assessment of test results. If deviations from the test method given in this st

25、andard are necessary, these deviations will be specified in the appropriate helmet standard. DIN EN 13087-2:2012-04 EN 13087-2:2012 (E) 5 1 Scope The European Standard specifies methods of test for protective helmets. The purpose of these tests is to enable assessment of the performance of the helme

26、t as specified in the appropriate helmet standard. This European Standard specifies the method for determination of shock absorption. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies

27、. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 960:2006, Headforms for use in the testing of protective helmets EN 13087-1, Protective helmets Test methods Part 1: Conditions and conditioning ISO 6487, Road vehicles Measurement techniqu

28、es in impact tests Instrumentation 3 Terms and definitions For the purposes of this document, the terms and definitions used in this standard can be found in the appropriate helmet standard. 4 Prerequisites In order to implement this part of EN 13087, at least the following parameters need to be spe

29、cified in the appropriate helmet standard: a) performance requirements; b) number of samples; c) preparation of samples; d) sequence of conditioning; e) sequence of tests; f) method of test - 5.2 or 5.3; g) sizes of headforms; h) type of striker or anvil; i) fitting instructions; j) number and locat

30、ion of impact points on helmets; k) for each impact, the impact energy, including tolerance, of the falling mass for the falling mass method, or the impact speed, including tolerance, of the helmet/headform assembly for the falling headform method. DIN EN 13087-2:2012-04 EN 13087-2:2012 (E) 6 5 Test

31、 methods 5.1 General Testing shall be performed in the ambient conditions specified in EN 13087-1. When the test method specifies that the helmet shall be fitted to a headform, this shall be done in accordance with the appropriate helmet standard. Two test methods are specified. The appropriate helm

32、et standard will state which of these methods is applicable. Annex A refers to the uncertainty of measurement. 5.2 Falling mass method 5.2.1 Principle A specified striker is allowed to fall with specified energy on to a helmet which is fitted to a rigidly mounted headform. The transmitted force is m

33、easured by means of a force transducer located beneath the headform. 5.2.2 Apparatus 5.2.2.1 Base The base shall be solid, made of steel or a combination of steel and concrete and have a mass of not less than 500 kg. At least the uppermost 25 mm shall consist of steel, which shall be firmly attached

34、 to the concrete if present. No part of the base and headform mounting assembly shall have a resonant frequency liable to affect the measurements. NOTE See 5.2.2.6.2 regarding frequency response. 5.2.2.2 Test headforms The headforms shall comply with EN 960:2006, 2.2, 3.1.2 and 3.2. The sizes to be

35、used are specified in the helmet standard, but shall be selected from size designations 495, 535, 575, 605 and 625 (equivalent to codes A, E, J, M and O, respectively, EN 960:1994). When in the upright position, the headform shall be positioned so that its central vertical axis coincides with those

36、of the force transducer and striker. 5.2.2.3 Striker Two types of striker are specified - a flat one and a hemispherical one. The type of striker to be used is specified in the appropriate helmet standard. The striker shall be made of steel and have a mass of (5 0,05) kg. The flat striker shall have

37、 a flat striking face of diameter (100 2) mm, with the edge of its circumference radiused to nominally 2 mm. The hemispherical striker shall have a hemispherical striking face of radius (50 1) mm. 5.2.2.4 Guidance system Means shall be provided for the striker to be dropped in free or guided fall. T

38、he guidance system shall be such as to ensure that the striker: shall be positioned above the headform so that its central axis coincides with the central vertical axis of the force transducer; and falls on to the required impact point with an impact speed of not less than 95% of that which would th

39、eoretically obtain for a free fall. DIN EN 13087-2:2012-04 EN 13087-2:2012 (E) 7 5.2.2.5 Means to measure impact speed Unless free fall is employed, means shall be provided to measure the striker speed at a distance of no more than 60 mm prior to impact, to within an accuracy of 1 %. The impact spee

40、d shall be measured during the commissioning of the apparatus. It need not be done for each impact, but has to be sufficiently regular to comply with 5.2.2.4. 5.2.2.6 Instrumentation to record and analyse the data 5.2.2.6.1 Force transducer The non-inertial force transducer shall be firmly attached

41、to the base and arranged so that its sensitive axis coincides with the vertical axis passing through the centre of gravity of the headform and the centre of the striker. The transducer shall be capable of withstanding a compressive force of 40 kN without damage. 5.2.2.6.2 Signal conditioning instrum

42、entation The instrumentation shall provide for the complete measuring channel to have a frequency response in accordance with channel frequency class (CFC) 600 of ISO 6487. If digital sampling is employed, a sample rate of at least 6 kHz shall be used. The required low pass filter may be included wi

43、thin the computer software. Means shall be provided to record the maximum force transmitted during impact, to the nearest 10 N. 5.2.3 Procedure Within 1 min of its removal from conditioning (this time applies to temperature conditioning only), fit the helmet to the appropriate headform in the manner

44、 in which it is intended to be worn on the head and allow the striker to fall on to the specified impact point. The impact energy shall be as specified in the appropriate helmet standard. If the design of the helmet permits direct contact between the striker and the headform, the test shall not be p

45、erformed and the result shall be declared a failure. 5.2.4 Test report Record and report the maximum force transmitted during the impact to the nearest 10 N. 5.3 Falling headform method 5.3.1 Principle The helmet to be tested is fitted to a headform and the assembly is allowed to fall with specified

46、 speed on to a rigidly mounted anvil. The deceleration of the headform is measured by means of a tri-axial accelerometer located within the headform. 5.3.2 Apparatus 5.3.2.1 Base The base shall be solid, made of steel or a combination of steel and concrete and have a mass of not less than 500 kg. At

47、 least the uppermost 25 mm shall consist of steel, which shall be firmly attached to the concrete if present. No part of the base and anvil assembly shall have a resonant frequency liable to affect the measurements. NOTE See 5.3.2.6.2 regarding frequency response. DIN EN 13087-2:2012-04 EN 13087-2:2

48、012 (E) 8 5.3.2.2 Anvil Two types of anvil are specified - a flat one and a kerbstone one. Both shall be made of steel. The anvil to be used is specified in the appropriate helmet standard. The flat anvil shall have a flat impact face of diameter (130 3) mm, with the edge of its circumference radius

49、ed to nominally 2 mm. The kerbstone anvil shall have two faces, each inclined at (52,5 2,5) to the vertical and meeting along a striking edge with a radius of (15 0,5) mm. The height shall be not less than 50 mm and the length not less than 125 mm. 5.3.2.3 Guidance system Means shall be provided for the headform/helmet assembly to be dropped in free or guided fall. The guidance syst