ISO 16750-3-2012 Road vehicles - Environmental conditions and testing for electrical and electronic equipment - Part 3 Mechanical loads《道路车辆 电气和电子设备的环境条件和测试 第3部.pdf
《ISO 16750-3-2012 Road vehicles - Environmental conditions and testing for electrical and electronic equipment - Part 3 Mechanical loads《道路车辆 电气和电子设备的环境条件和测试 第3部.pdf》由会员分享,可在线阅读,更多相关《ISO 16750-3-2012 Road vehicles - Environmental conditions and testing for electrical and electronic equipment - Part 3 Mechanical loads《道路车辆 电气和电子设备的环境条件和测试 第3部.pdf(52页珍藏版)》请在麦多课文档分享上搜索。
1、 ISO 2012 Road vehicles Environmental conditions and testing for electrical and electronic equipment Part 3: Mechanical loads Vhicules routiers Spcifications denvironnement et essais de lquipement lectrique et lectronique Partie 3: Contraintes mcaniques INTERNATIONAL STANDARD ISO 16750-3 Third editi
2、on 2012-12-15 Reference number ISO 16750-3:2012(E) ISO 16750-3:2012(E)ii ISO 2012 All rights reserved COPYRIGHT PROTECTED DOCUMENT ISO 2012 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical
3、, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org
4、Published in Switzerland ISO 16750-3:2012(E) ISO 2012 All rights reserved iii Contents Page Foreword iv 1 Scope . 1 2 Normative references 1 3 T erms and definitions . 1 4 Tests and requirements 1 4.1 Vibration . 1 4.2 Mechanical shock .27 4.3 Free fall .29 4.4 Surface strength/scratch and abrasion
5、resistance .29 4.5 Gravel bombardment 29 5 Code letters for mechanical loads .29 6 Documentation 30 Annex A (informative) Guideline for the de v elopment of t est pr ofiles for vibr ation t ests .32 Annex B (informative) Recommended mechanical requirements for equipment depending on the mounting loc
6、ation 44 Bibliogr aph y .46 ISO 16750-3:2012(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each m
7、ember 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. ISO collaborates closely with the International
8、Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards a
9、dopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of p
10、atent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 16750-3 was prepared by Technical Committee ISO/TC 22, Road vehicle, Subcommittee SC 3, Electrical and electronical equipment. This third edition cancels and replaces the second edition (ISO 16750-3:20
11、07), which has been technically revised. ISO 16750 consists of the following parts, under the general title Road vehicles Environmental conditions and testing for electrical and electronic equipment: Part 1: General Part 2: Electrical loads Part 3: Mechanical loads Part 4: Climatic loads Part 5: Che
12、mical loadsiv ISO 2012 All rights reserved INTERNATIONAL ST ANDARD ISO 16750-3:2012(E) Road vehicles Environmental conditions and testing for electrical and electronic equipment Part 3: Mechanical loads 1 Scope This part of ISO 16750 applies to electric and electronic systems/components for road veh
13、icles. It describes the potential environmental stresses and specifies tests and requirements recommended for the specific mounting location on/in the vehicle. This part of ISO 16750 describes mechanical loads. 2 Normative references The following referenced documents are indispensable for the appli
14、cation of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 16750-1, Road vehicles Environmental conditions and testing for electrical and electronic equipment Part 1: Gen
15、eral IEC 60068-2, 6, Environmental testing Part 2-6: Testing, Test Fc: Vibration (Sinusoidal) IEC 60068-2, 14, Basic environmental testing procedures Par t 2-14: Te s t s Te s t Nb: Change of t emperat ure IEC 60068-2, 64, Environmental testing Part 2-64: Test methods Test Fh Vibration, broad-band r
16、andom (digital control) and guidance IEC 60068-2, 80, Environmental testing Part 2-80: Tests Test Fi: Vibration Mixed mode testing IEC 60068-2-31, Environmental testing procedures Part 2: Tests; Test Ec: Free fall, Clause 5.2 3 T erms an d definiti ons For the purposes of this document, the terms an
17、d definitions given in ISO 16750-1 apply. 4 Tests and requirements 4.1 V ibr ation 4.1.1 General The vibration test methods specified consider various levels of vibration severities applicable to on- board electrical and electronic equipment. It is recommended that the vehicle manufacturer and suppl
18、ier choose the test method, the environmental temperature and vibration parameters depending on the specific mounting location. Following the expressions in MIL-STD please notice: ISO 2012 All rights reserved 1 ISO 16750-3:2012(E) When applied properly, the environmental management and engineering p
19、rocesses described in this part of ISO 16750 can be of enormous value in generating confidence in the environmental worthiness and overall durability. However, it is important to recognize that there are limitations inherent in laboratory testing that make it imperative to use proper caution and eng
20、ineering judgement when extrapolating these laboratory results to results that may be obtained under actual service conditions. In many cases, real- world environmental stresses (singularly or in combination) cannot be duplicated practically or reliably in test laboratories. Therefore, users of this
21、 part of ISO 16750 should not assume that a system or component that passes laboratory tests of this part of ISO 16750 would also pass field/fleet verification trials. “The specified values are the best estimation one can get up to the moment when results from measurements in the car are received bu
22、t they do not replace a car measurement!” The specified values apply to direct mounting in defined mounting locations. Using a bracket for mounting can result in higher or lower loads. If the device under test (DUT) is used in the vehicle with a bracket then all vibration and mechanical shock test s
23、hall be done with this bracket. Carry out the vibration with the DUT suitably mounted on a vibration table. The mounting method(s) used shall be noted in the test report. Carry out the frequency variation by logarithmic sweeping of 0,5 octave/minute for sinusoidal tests and the sinusoidal part of si
24、ne on random tests. The scope of the recommended vibration tests is to avoid malfunctions and breakage mainly due to fatigue in the field. Testing for wear has special requirements and is not covered in this part of ISO 16750. Loads outside of the designated test frequency ranges are to be considere
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