SAE J 1698-2017 Event Data Recorder.pdf

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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 there

2、from, 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 2017 SAE International All rights reserved. No part of this p

3、ublication 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: +1 724-776-497

4、0 (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:/standards.sae.org/J1698_201703 SURFACE VEHICLE RECOMMENDED PRACTICE J1698 MAR2017 Issued 2013-12 Revised 2017-03S

5、uperseding J1698 MAY2014 Event Data Recorder RATIONALE This Recommended Practice is being revised in order to incorporate the information previously contained in SAE J1698-1, Section 3. 1. SCOPE This recommended practice describes common definitions and operational elements of Event Data Recorders.

6、The SAE J1698 series of documents consists of the following: x SAE J1698-1 - Event Data Recorder - Output Data Definition; Provides common data output formats and definitions for a variety of data elements that may be useful for analyzing vehicle crash and crash-like events that meet specified trigg

7、er criteria. x SAE J1698-2 - Event Data Recorder - Retrieval Tool Protocol; Utilizes existing industry standards to identify a common physical interface and define the protocols necessary to retrieve records stored by light duty vehicle Event Data Recorders (EDRs). x SAE J1698-3 - Event Data Recorde

8、r - Compliance Assessment; Defines procedures that may be used to validate that relevant EDR output records conform with the reporting requirements specified in Part 563, Table 1 during the course of FMVSS-208, FMVSS-214 and other applicable vehicle level crash testing. SAE INTERNATIONAL J1698 MAR20

9、17 Page 2 of 7 2. REFERENCES 2.1 Applicable Documents The following publications form a part of this specification to the extent specified herein. Unless otherwise indicated, the latest issue of SAE publications shall apply. 2.1.1 SAE Publications Available from SAE International, 400 Commonwealth D

10、rive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or +1 724-776-4970 (outside USA), www.sae.org. SAE J211-1 Instrumentation for Impact Test - Part 1 - Electronic Instrumentation SAE J670 Vehicle Dynamics Terminology SAE J1698-1 Event Data Recorder - Output Data Definition SA

11、E J1698-2 Event Data Recorder - Retrieval Tool Protocol SAE J1698-3 Event Data Recorder - Compliance Assessment SAE J1962 Diagnostic Connector 2.2 Related Publications The following publications are provided for information purposes only and are not a required part of this SAE Technical Report. 2.2.

12、1 National Highway Traffic Safety Administration (NHTSA) Available from the United States Government Printing Office, 732 North Capitol Street, NW, Washington, DC 20401, Tel: 202-512-1800, http:/www.ecfr.gov/. 49 CFR Part 563 Event Data Recorders 2014 FARS/NASS GES Coding and Validation Manual, DOT

13、HS 812 216, Washington, DC November 2015 2.2.2 ANSI Accredited Publications/IEC Publications Copies of these documents are available online at http:/webstore.ansi.org or available from from IEC Central Office, 3, rue de Varembe, P.O. Box 131, CH-1211 Geneva 20, Switzerland, Tel: +41 22 919 02 11, ww

14、w.iec.ch. ANSI/IEC 60529-2004 Degrees of Protection Provided by Enclosures: November 3, 2004 3. DEFINITIONS 3.1 ACCELERATION G The rate of change in velocity as a function of time. NOTE: In this document, the upper case “G” is used to designate the data element name for the acceleration of a vehicle

15、. The lower case “g” is the unit of acceleration (1 g = 9.80665 m/s2). SAE INTERNATIONAL J1698 MAR2017 Page 3 of 7 3.2 ACTIVE PEDESTRIAN PROTECTION SYSTEMS Active is used to describe those Pedestrian Protection systems that command deployment of a device or function. 3.3 ARRAY An arrangement of data

16、 elements in a defined method. In an EDR, an array will consist of an arrangement of data elements sampled at defined time instances for a defined duration. 3.4 AUTHENTICATION AND ENCRYPTION A technique for ensuring that an EDR record is genuine and that it has not been altered since being imaged an

17、d stored by the EDR Retrieval Tool. 3.5 BITMAPPED DATA Typically used to represent simple “yes/no” questions (e.g., buckled or unbuckled). Bitmapped values are typically packed together with other bit mapped values into one or more bytes. 3.6 COMPLIANCE The act of adhering to and demonstrating adher

18、ence to a standard or regulation. 3.7 CRASH PULSE The acceleration-time history of the event. 3.8 DATA CAPTURE The process of buffering certain data, in a temporary volatile storage medium, where it is continuously updated at regular time intervals. This data may be used by the EDR. 3.9 DELTA-V The

19、cumulative change in vehicle velocity as recorded by the EDR. 3.10 DISPOSAL The deployment command of the second (or higher, if present) stage of a frontal air bag for the purpose of disposing of the propellant from an air bag device. 3.11 EVENT DATA RECORDER (EDR) A function within one or more vehi

20、cle electronic modules that monitors vehicle and occupant protection system time-series data, prior to and during specific events, defined within the applicable Recommended Practice, with the intent of retrieving the data after the event. This data is not intended to include freeze-frame type data (

21、non EDR data), diagnostic data, or telematics system data. 3.12 EDR RECORD Electronic data file(s) stored in non-volatile memory in one or more specified vehicle ECUs following the occurrence of an event. 3.13 EDR RECORD REPORT The output by an EDR Retrieval Tool designed to image EDR records from m

22、otor vehicles and translate the data. SAE INTERNATIONAL J1698 MAR2017 Page 4 of 7 3.14 EDR RETRIEVAL TOOL An electronic tool consisting of the hardware and software required to: a. make a connection to the vehicles SAE J1962 connector b. image the EDR record c. authenticate, encrypt, and save the un

23、-translated binary EDR record to a file on a PC d. open and authenticate a saved, un-translated file(s) containing an EDR record(s) and translate it into a human-readable report 3.15 EDR RECORD RETRIEVAL The process by which an EDR Retrieval Tool images, translates, and reports an EDR record. 3.16 F

24、RONTAL AIR BAG An inflatable occupant protection system that requires no action by vehicle occupants and is used to meet the applicable frontal crash protection requirements. 3.17 GROUND Term used with the intention to indicate the local plane on which the vehicle is traveling, not an absolute horiz

25、ontal plane. 3.18 IMAGING The process by which an EDR Retrieval Tool reads an EDR record. 3.19 LATERAL ACCELERATION The component of the acceleration vector of a point in the vehicle in the Y-direction. The lateral acceleration is positive from left to right, from the perspective of the driver when

26、seated in the vehicle facing the direction of forward vehicle travel. Refer to Vehicle Coordinate System defined below. 3.20 LOCKED EVENT An EDR record that is not overwritten by subsequent events. 3.21 LONGITUDINAL ACCELERATION The component of the acceleration vector of a point in the vehicle in t

27、he X-direction. The longitudinal acceleration is positive in the direction of forward vehicle travel. Refer to Vehicle Coordinate System defined below. 3.22 LOWER CONTROL LIMITS (LCL) Used to define the bottom limit for compliance testing of a variable. SAE INTERNATIONAL J1698 MAR2017 Page 5 of 7 3.

28、23 NORMAL ACCELERATION The component of the vector acceleration of a point in the vehicle in the Z-direction. The normal acceleration is positive in a downward direction. Refer to Vehicle Coordinate System defined below. 3.24 OCCUPANT PROTECTION CONTROL ALGORITHM Crash sensing logic, not a pre-crash

29、 sensing logic that activates occupant protection devices as necessary. 3.25 PASSIVE PEDESTRIAN PROTECTION SYSTEMS (pedestrian protection system EDRS only) Passive is used to describe Pedestrian Protection systems that are designed into the vehicle and are not deployable devices. 3.26 PRETENSIONER A

30、 device that is activated by a vehicles occupant protection control algorithm and tightens the belt in a vehicle safety belt system. 3.27 RECORD The process of saving captured EDR data into a non-volatile memory for subsequent retrieval. 3.28 REPORT HEADER The first section of the EDR Record Report

31、that contains information about the vehicle, EDR Retrieval Tool, and EDR record which provides context for the report. 3.29 REVERSIBLE/RESETTABLE RESTRAINT A restraint system device that returns automatically to a condition in which it can be reused or requires only a mechanical input to be usable a

32、gain. 3.30 SEATING POSITION Identifies the position of vehicle seats which may be indicated by a predetermined order or by the convention listed in Table 1, which is based on the NHTSAs Fatality Analysis Reporting System (FARS) seating convention. NOTE: This header data may be used in combination wi

33、th the following data elements as described in SAE J1698-1 to connect those data to specific seating location: Safety Belt Status, Seat Track Position Switch, Forward Status, Occupant Protection Device Deployment Status, and Occupant Protection Device Deployment Time. Table 1 - Seating Position Sign

34、al Value Seating Position 11 Front Seat Left Side 12 Front Seat - Middle 13 Front Seat Right Side 21 Second Seat Left Side 22 Second Seat Middle 23 Second Seat Right Side 31 Third Seat Left Side 32 Third Seat Middle 33 Third Seat Right Side SAE INTERNATIONAL J1698 MAR2017 Page 6 of 7 3.31 SIDE AIR B

35、AG/SIDE CURTAIN AIR BAG An inflatable occupant protection system typically mounted to the seat or side structure of the vehicle interior that deploys during applicable side impact or rollover events. 3.32 SIGNED NUMERIC DATA Typically used to represent data with positive, negative, or zero values. T

36、he typical convention is to store signed data using a twos complement system. The twos complement of a binary number is defined as the value obtained by subtracting the number from a power of two (specifically, from 2N for an N-bit twos complement). A twos complement system is a system in which nega

37、tive numbers are represented by the twos complement of the absolute value. 3.33 TRANSLATING The process by which an EDR Retrieval Tool uses vehicle manufacturer-proprietary information to convert data stored in an EDR record and render it into a human-readable report. 3.34 TRIGGER THRESHOLD For Fron

38、t, Side, or Rear events: A change in vehicle velocity, in the longitudinal direction, that equals or exceeds 8 km/h within a 150 ms interval. For vehicles that record “deltaV, lateral,” trigger threshold means a change in vehicle velocity in either the longitudinal or lateral direction that equals o

39、r exceeds 8 km/h within a 150 ms interval. For both cases above, if the event is less than 150 ms in duration, the trigger threshold means a change in vehicle velocity that equals or exceeds 8 km/h since the most recent time zero. For Rollover events: See “Beginning of Rollover Event”. Refer to SAE

40、J1698-1. For Pedestrian Protection events: See “Beginning of Pedestrian Protection Event”. Refer to SAE J1698-1. 3.35 TIME ZERO The beginning of a crash event. Refer to SAE J1698-1. 3.36 UNLOCKED EVENT An EDR record that may be overwritten by subsequent events. 3.37 UNSIGNED NUMERIC DATA Typically u

41、sed to represent data with only positive or zero values. 3.38 UPPER CONTROL LIMITS (UCL) Used to define the upper limit for compliance testing of a variable. 3.39 VEHICLE COORDINATE SYSTEM The same coordinate system (axis and direction) that is defined in SAE J211-1 and SAE J670 applies to this Reco

42、mmended Practice. 3.40 VEHICLE INTERFACE DEVICE A device that acts as a communication bridge between the vehicle and a personal computer (PC). SAE INTERNATIONAL J1698 MAR2017 Page 7 of 7 3.41 WINDOW A region of acceptance defined as the values between the UCL and LCL for a given variable. This may i

43、nclude parameters for a single variable or for multiple variables. 4. ECU ENVIRONMENTAL CHARACTERISTICS 4.1 An ECU storing an EDR Record shall meet, as a minimum, these enclosure classifications described in ANSI/IEC 60529-2004: Table 2 ECU Location Enclosure Classification* Description Engine Compa

44、rtment IP56 Dust protected. Protected against powerful water jets. Interior IP51 Dust protected. Protected against vertically dripping water. Trunk IP51 Dust protected. Protected against vertically dripping water. *International Protection (IP) (also known as ingress protection). IP5x dust can enter

45、 the enclosure but not affect operation. IPx1 vertically falling drops shall have no harmful effects. IPx6 water jets projected against the enclosure from any direction shall have no harmful effects. Figure 1 5. NOTES 5.1 Revision Indicator A change bar (I) located in the left margin is for the conv

46、enience of the user in locating areas where technical revisions, not editorial changes, 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 EVENT DATA RECORDER COMMITTEE OF THE ELECTRICAL DISTRIBUTION STEERING COMMITTEE