1、 _ SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising ther
2、efrom, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be revised, reaffirmed, stabilized, or cancelled. SAE invites your written comments and suggestions. Copyright 2015 SAE International All rights reserved. No part of this
3、publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE. TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: +1 724-776-49
4、70 (outside USA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org SAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/J182_201507 SURFACE VEHICLE RECOMMENDED PRACTICE J182 JUL2015 Issued 1973-09 Rev
5、ised 2015-07 Superseding J182 APR2005 Motor Vehicle Fiducial Marks and Three-dimensional Reference System RATIONALE Figure 1 and the related technical content has been has been updated. All other content has been reaffirmed to comply with the SAE 5 Year Review Policy. 1. SCOPE This SAE Recommended P
6、ractice describes a procedure for locating the three-dimensional reference system on a motor vehicle as built. 1.1 Purpose For complete motor vehicle dimensional checks, a method is required for locating the three-dimensional reference system on a motor vehicle so that points of interest (for exampl
7、e, driver eye location, seating reference point, centerline of motor vehicle, etc.) can be determined. 2. REFERENCES There are no referenced publications specified herein. 3. DEFINITIONS 3.1 THREE-DIMENSIONAL REFERENCE SYSTEM The relationship of three orthogonal planes established by the manufacture
8、rs in the initial design stages of the vehicle that remain permanent (see Error! Reference source not found.). The planes are used to determine dimensional relationships for components in and around the vehicle and are defined as follows: 3.1.1 Zero “Y“ Plane Centerline body zero plane is a vertical
9、 plane which passes through the longitudinal centerline of the car. 3.1.2 Zero “X“ Plane Vertical body zero plane is a plane normal to the “Y“ plane. This plane is typically in front of the vehicle to eliminate the use of negative numbers. SAE INTERNATIONAL J182 Revised JUL2015 Page 2 of 3 3.1.3 Zer
10、o “Z“ Plane Horizontal body zero plane is a plane normal to the “X“ and “Y“ planes. Its relationship to the horizontal is determined by the fiducial mark. This plane is typically slightly below the vehicle for all loaded conditions to eliminate the use of negative numbers. 3.1.4 Negative Coordinate
11、The negative direction is forward of “X“ plane, left of the “Y“ plane, and below “Z“ plane. 3.1.5 Coordinate Origin All points of interest are described as coordinates dimensioned from the intersection of the zero planes (origin) in the three-dimensional reference system. X, Y, Z coordinates are dim
12、ensioned to their respective planes. 3.2 FIDUCIAL MARKS These are identifiable holes, surfaces, marks, or indentations, on the vehicle body, visible and accessible from outside the vehicle as described by the manufacturer. Figure 1 - Three dimensional reference system 4. REQUIREMENTS The minimum of
13、three fiducial marks shall be specified, one on each side of the “Y“ plane (usually symmetrical for convenience) and an additional one forward or rearward of the first two, all as far apart as allowable and usable. SAE INTERNATIONAL J182 Revised JUL2015 Page 3 of 3 5. PROCEDURE 5.1 Position the moto
14、r vehicle on a level surface (Horizontal Z-Plane). 5.2 Adjust motor vehicle height and attitude relative to the Horizontal Z-plane based on the manufacturer specified fiducial marks. 5.3 Locate the dimension reference system on the motor vehicle. Locations of interest can now be dimensioned in the a
15、ctual motor vehicle with respect to the designed motor vehicle using coordinates in the three-dimensional reference system. 6. NOTES 6.1 Marginal Indicia A change bar (l) located in the left margin is for the convenience of the user in locating areas where technical revisions, not editorial changes,
16、 have been made to the previous issue of this document. An (R) symbol to the left of the document title indicates a complete revision of the document, including technical revisions. Change bars and (R) are not used in original publications, nor in documents that contain editorial changes only. PREPARED BY THE SAE HUMAN ACCOMMODATION AND DESIGN DEVICES STANDARDS COMMITTEE
