1、BSI Standards PublicationBS ISO 5721-1:2013Agricultural tractors Requirements, test proceduresand acceptance criteria for theoperators field of visionPart 1: Field of vision to the frontBS ISO 5721-1:2013 ISO 2013Agricultural tractors Requirements, test procedures and acceptance criteria for the ope
2、rators field of vision Part 1: Field of vision to the frontTracteurs agricoles Exigences, modes opratoires dessai et critres dacceptation relatifs au champ de visibilit du conducteur Partie 1: Champ de visibilit vers lavantINTERNATIONAL STANDARDISO5721-1First edition2013-07-01Reference numberISO 572
3、1-1:2013(E)BS ISO 5721-1:2013 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 5721-1:2013. Together with BS ISO 5721-2, it supersedes BS ISO 5721:1989, which will be withdrawn upon publication of BS ISO 5721-2.The UK participation in its preparation was entrust
4、ed to Technical Committee AGE/6, Agricultural tractors and forestry machinery.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its corre
5、ct application. The British Standards Institution 2013. Published by BSI Standards Limited 2013ISBN 978 0 580 73555 4ICS 65.060.10Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strat
6、egy Committee on 30 September 2013.Amendments issued since publicationDate Text affectedBS ISO 5721-1:2013 ISO 2013Agricultural tractors Requirements, test procedures and acceptance criteria for the operators field of vision Part 1: Field of vision to the frontTracteurs agricoles Exigences, modes op
7、ratoires dessai et critres dacceptation relatifs au champ de visibilit du conducteur Partie 1: Champ de visibilit vers lavantINTERNATIONAL STANDARDISO5721-1First edition2013-07-01Reference numberISO 5721-1:2013(E)BS ISO 5721-1:2013ISO 5721-1:2013(E)ii ISO 2013 All rights reservedCOPYRIGHT PROTECTED
8、DOCUMENT ISO 2013All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission
9、 can be requested from either ISO at the address below or ISOs member body in the country of the requester.ISO copyright officeCase postale 56 CH-1211 Geneva 20Tel. + 41 22 749 01 11Fax + 41 22 749 09 47E-mail copyrightiso.orgWeb www.iso.orgPublished in SwitzerlandBS ISO 5721-1:2013ISO 5721-1:2013(E
10、) ISO 2013 All rights reserved iiiContents PageForeword iv1 Scope . 12 Normative references 13 Terms and definitions . 14 General provisions for testing 24.1 Measurement accuracy 24.2 Eye position . 25 Requirements, test procedures and acceptance criteria 25.1 Requirements . 25.2 Test procedures 35.
11、3 Acceptance criteria 4Bibliography 9BS ISO 5721-1:2013ISO 5721-1:2013(E)ii ISO 2013 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2013All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or
12、 mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester.ISO copyright officeCase postale 56 CH-1211 Geneva 20Tel. + 41 22 749
13、 01 11Fax + 41 22 749 09 47E-mail copyrightiso.orgWeb www.iso.orgPublished in SwitzerlandBS ISO 5721-1:2013ISO 5721-1:2013(E) ISO 2013 All rights reserved iiiContents PageForeword iv1 Scope . 12 Normative references 13 Terms and definitions . 14 General provisions for testing 24.1 Measurement accura
14、cy 24.2 Eye position . 25 Requirements, test procedures and acceptance criteria 25.1 Requirements . 25.2 Test procedures 35.3 Acceptance criteria 4Bibliography 9BS ISO 5721-1:2013ISO 5721-1:2013(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national
15、standards bodies (ISO member bodies). The work of 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
16、 organizations, governmental and non-governmental, 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
17、 its further maintenance are described in the ISO/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. www.iso.org/dir
18、ectivesAttention is drawn to the possibility 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
19、Introduction and/or on the ISO list of patent declarations received. www.iso.org/patentsAny trade name used in this document is information given for the convenience of users and does not constitute an endorsement.The committee responsible for this document is ISO/TC 23, Tractors and machinery for a
20、griculture and forestry, Subcommittee SC 4, Tractors.This first edition of ISO 5721-1, together with ISO 5721-2, cancels and replaces ISO 5721:1989, which has been technically revised.ISO 5721 consists of the following parts, under the general title Agricultural tractors Requirements, test procedure
21、s and acceptance criteria for the operators field of vision: Part 1: Field of vision to the front Part 2: Field of vision to the side and to the reariv ISO 2013 All rights reservedBS ISO 5721-1:2013INTERNATIONAL STANDARD ISO 5721-1:2013(E)Agricultural tractors Requirements, test procedures and accep
22、tance criteria for the operators field of vision Part 1: Field of vision to the front1 ScopeThis part of ISO 5721 specifies the requirements, test procedures and acceptance criteria for the field of vision to the front of the operator of agricultural tractors.2 Normative referencesThe following docu
23、ments, in whole or in part, are normatively referenced in this 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 5353:1995, Earth-movin
24、g machinery, and tractors and machinery for agriculture and forestry Seat index point3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.3.1field of visionarea which can be viewed from the seated operators eye position3.1.1direct field of visionvisibil
25、ity by direct line of sight as determined by the light from the light source3.1.2indirect field of visionvisibility with the aid of mirrors or with other visual aids such as closed circuit television cameras (CCTV)3.2semi-circle of vision to the frontsemi-circle described by a radius of 12 m about a
26、 point situated in the horizontal plane of the road vertically below the reference point, in such a way that, when facing the direction of motion, the arc of the semi-circle lies in front of the tractor, while the diameter bounding the semi-circle is at right angles to the longitudinal axis of the t
27、ractorNote 1 to entry: See Figure 2.3.3angle of vision upwardsangle of vision limited downwards by a horizontal plane passing through the eye pos ition and upwards by planes containing the rays of vision from the eye position to points of obscuration caused by vehicle components other than those whi
28、ch cause masking effects (3.4) ISO 2013 All rights reserved 1BS ISO 5721-1:2013ISO 5721-1:2013(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carr
29、ied 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-governmental, in liaison with ISO, also take part in the work.
30、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 ISO/IEC Directives, Part 1. In particular the differen
31、t 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. www.iso.org/directivesAttention is drawn to the possibility that some of the elements of this document may be the s
32、ubject 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 patent declarations received. www.iso.org/patentsAny trade na
33、me used in this document is information given for the convenience of users and does not constitute an endorsement.The committee responsible for this document is ISO/TC 23, Tractors and machinery for agriculture and forestry, Subcommittee SC 4, Tractors.This first edition of ISO 5721-1, together with
34、 ISO 5721-2, cancels and replaces ISO 5721:1989, which has been technically revised.ISO 5721 consists of the following parts, under the general title Agricultural tractors Requirements, test procedures and acceptance criteria for the operators field of vision: Part 1: Field of vision to the front Pa
35、rt 2: Field of vision to the side and to the reariv ISO 2013 All rights reservedBS ISO 5721-1:2013INTERNATIONAL STANDARD ISO 5721-1:2013(E)Agricultural tractors Requirements, test procedures and acceptance criteria for the operators field of vision Part 1: Field of vision to the front1 ScopeThis par
36、t of ISO 5721 specifies the requirements, test procedures and acceptance criteria for the field of vision to the front of the operator of agricultural tractors.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for it
37、s application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 5353:1995, Earth-moving machinery, and tractors and machinery for agriculture and forestry Seat index point3 Terms and def
38、initionsFor the purposes of this document, the following terms and definitions apply.3.1field of visionarea which can be viewed from the seated operators eye position3.1.1direct field of visionvisibility by direct line of sight as determined by the light from the light source3.1.2indirect field of v
39、isionvisibility with the aid of mirrors or with other visual aids such as closed circuit television cameras (CCTV)3.2semi-circle of vision to the frontsemi-circle described by a radius of 12 m about a point situated in the horizontal plane of the road vertically below the reference point, in such a
40、way that, when facing the direction of motion, the arc of the semi-circle lies in front of the tractor, while the diameter bounding the semi-circle is at right angles to the longitudinal axis of the tractorNote 1 to entry: See Figure 2.3.3angle of vision upwardsangle of vision limited downwards by a
41、 horizontal plane passing through the eye pos ition and upwards by planes containing the rays of vision from the eye position to points of obscuration caused by vehicle components other than those which cause masking effects (3.4) ISO 2013 All rights reserved 1BS ISO 5721-1:2013ISO 5721-1:2013(E)3.4
42、masking effectschords of the sectors of the semi-circle of vision to the front which cannot be seen owing to structural components such as roof-pillars, air intakes or exhaust stacks and the frame of the windscreen3.5sector of vision to the frontpart of the field of vision limited by a horizontal pl
43、ane passing through the reference point3.6sector of vision to the frontpart of the field of vision limited by the zone lying outside the semi-circle of vision to the front, and forming the continuation of the sector of the semi-circle of vision to the front, the chord of which is 9,50 m long, perpen
44、dicular to the plane parallel to the longitudinal median plane of the tractor passing through the centre of the drivers seat and bisected by that plane3.7swept area of the windscreen wipersarea of the outer surface of the windscreen swept by the windscreen wipers3.8reference pointposition on the gro
45、und vertically below the eye position4 General provisions for testing4.1 Measurement accuracyThe equipment and techniques used to make the physical measurements shall be accurate to within 2 % of the value measured.4.2 Eye positionThe eye position shall be located 680 mm above and 20 mm in front of
46、the seat index point when determined in accordance with ISO 5353 (see Figure 1).5 Requirements, test procedures and acceptance criteria5.1 Requirements5.1.1 GeneralThe tractor shall be constructed and equipped in such a way that, in road traffic and in farm use, the driver has an adequate field of v
47、ision, under all the usual conditions pertaining to highway use and to work undertaken in fields. The field of vision is adequate when the driver has at least a partial view of each front tyre or fender when in the straight ahead position and at track width appropriate for the overall width of singl
48、e tyres not to exceed 2,55 m.5.1.2 Masking effectsMasking effects shall not exceed 700 mm.Masking effects due to adjacent structural components over 80 mm in width shall be so configured that there is an interval of not less than 2 200 mm - measured as a chord of the semi-circle of vision to the fro
49、nt - between the centres of two masking effects.2 ISO 2013 All rights reservedBS ISO 5721-1:2013ISO 5721-1:2013(E)There shall be no more than six masking effects in the semi-circle of vision to the front and no more than two inside the sector of vision to the front defined in 3.5.For the purpose of determining the masking effects in the sector of vision to the front, the masking effects due to the frame of the windscreen and to any other obstacle may be considered as a single effect, provided th
