SAE J 1538-2015 Glossary of Automotive Inflatable Restraint Systems.pdf

1、 SURFACE VEHICLE INFORMATION REPORT J1538 APR2015 Issued 1988-04 Revised 2015-04 Superseding J1538 JAN2010 Glossary of Automotive Inflatable Restraint Systems RATIONALE This glossary is updated to reflect changes in technology and remove definitions that are no longer commonly used. FOREWORD This gl

2、ossary is prepared to serve as a basis for improving the communication and understanding of automobile inflatable restraint systems. Representatives from automobile manufacturers, government agencies, and restraint system suppliers have assisted in this compilation of the terms and descriptions. 1.

3、SCOPE The terms included in the Glossary are general in nature and may not apply to all manufacturers systems. All terms in Section 3 apply to automotive inflatable restraint systems in general which are initiated by an electric or mechanical stimulus upon receipt of a signal from a sensor. These te

4、rms are intended to reflect existing designs and the Glossary will be updated as information on other types of systems becomes available. Appendix A is included to identify terminology that is no longer in common use or specifically applicable to inflatable restraint systems, but was published in th

5、e December 2001 version of SAE J1538. 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 International Available from SAE Internati

6、onal, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or +1 724-776-4970 (outside USA), www.sae.org. SAE/USCAR2-5 Performance Specification for Automotive Electrical Connector Systems SAE/USCAR24-2 USCAR Inflator Technical Requirements and Validation SAE/

7、USCAR28 Initiator Technical Requirements and Validation _ 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 particu

8、lar use, including any patent infringement arising therefrom, 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

9、SAE International All rights reserved. No part of this 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:

10、877-606-7323 (inside USA and Canada) Tel: +1 724-776-4970 (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/J1538_201504 SAE INTERNAT

11、IONAL J1538 Revised APR2015 Page 2 of 24 2.1.2 Federal Publications Available from the United States Government Printing Office, 732 North Capitol Street, NW, Washington, DC 20401, Tel: 202-512-1800, http:/www.access.gpo.gov/nara/cfr/cfr-table-search.html#page1. 49 CFR 171.8 Definitions and Abbrevia

12、tions 2.1.3 IEEE Publication Available from IEEE Operations Center, 445 Hoes Lane, Piscataway, NJ 08854-4141, Tel: 732-981-0060, www.ieee.org. IEEE STD-100-1992 The New IEEE Standard Dictionary of Electrical and Electronics Terms (Institute of Electrical and Electronics Engineers, New York, 1993) 3.

13、 INFLATABLE RESTRAINT TERMINOLOGY (ALPHABETICAL) - GENERAL 3.1 AHAAH (Auditory Hazard from Airbags - Human) Name given to the human ear model from Army Research Laboratory (ARL). Reference SAE J2531 “Impulse Noise from Automotive Inflatable Devices. 3.2 AIRBAG (See Cushion. 3.70) 3.3 AIRBAG CONTROL

14、MODULE (also called ACM, ACU, AECM, ECU, ECM, ORC, RCM, or SDM) An electronic module that provides one or more of the following; airbag deployment signal, airbag deployment logic, and/or airbag system diagnostics. 3.4 AIRBAG MODULE ASSEMBLY (See Module Assembly. 3.170) 3.5 AIRBAG SYSTEM (See Inflata

15、ble Restraint System. 3.145) 3.6 ALLFIRE PULSE The particular signal applied to a device in order to ensure activation within defined statistical and confidence intervals for a prescribed parameter envelope; i.e., time, temperature, etc. The electrical signal cited in the ALLFIRE Specification state

16、ment. 3.7 ALLFIRE SIGNAL Any electrical signal that is calculated to function the initiator with a known reliability based on a validated ALLFIRE Specification. 3.8 ALLFIRE SPECIFICATION A performance specification stating the minimum amplitude of an electrical pulse that will activate the initiator

17、 at a given reliability and confidence over a range of temperatures with full details of the firing circuit being given. 3.9 ALLFIRE SUFFICIENT An electrical circuit is said to be ALLFIRE Sufficient with respect to a given initiator ALLFIRE Specification if it can be proven that the circuit will ope

18、rate the initiator with a reliability equal to or exceeding that expressed in the specification throughout the range of environmental conditions expressed in the specification. SAE INTERNATIONAL J1538 Revised APR2015 Page 3 of 24 3.10 ARMED For an initiator firing circuit as implemented in a Fireset

19、, in a vehicle Electronic Control Unit, or in an Electronic Initiator, the condition whereupon (1) the local energy storage reservoir is adequately charged, and (2) the associated switching circuitry is ready to immediately service a Demand-to-Fire Signal. To Arm a firing circuit means to bring the

20、circuitry to the Armed state and to maintain the circuitry in this state. Compare to Disarmed 3.81. 3.11 ARU (Auditory Risk Unit) Reference SAE J2531 “Impulse Noise from Automotive Inflatable Devices.” 3.12 AUGMENTED INFLATOR (See Hybrid Inflator. 3.131) 3.13 AUTOIGNITION MATERIAL (AIM) A pyrotechni

21、c material placed inside of an inflator that causes activation of the inflator at a predetermined temperature threshold. 3.14 AUTOIGNITION TEMPERATURE For an Energetic Material, The Autoignition Temperature of a chemical is the lowest temperature at which a material will ignite without an external s

22、ource of ignition. 3.15 BAG (See Cushion 3.70) 3.16 BAG FOLD Description of the pattern, or sequence, by which a bag is folded for containment within an airbag module assembly. 3.17 BALLISTIC FACE The surface of a Plug that supports the Bridge. 3.18 BALLISTIC FUNCTION TIME (BFT) The observed duratio

23、n between the onset of an ALLFIRE Signal applied to an initiator and the first indication of ballistic functioning (flash, sound, pressure, etc). Data is reported in seconds. 3.19 BALLISTIC PEAK PRESSURE In a Closed Bomb Ballistic Test of an initiator, the maximum pressure observed. Data is reported

24、 in Pascals. 3.20 BALLISTIC PRESSURE The pressure-time response of an initiator fired in a Closed Bomb during a Ballistic Test. Data is reported in Pascals. 3.21 BALLISTIC RISE TIME The time interval measured from occurrence of the First Pressure event until the time when a sensor registers a specif

25、ied percentage of the recorded Ballistic Peak Pressure, typically 80% or 95% in a “Ballistic Test” of an initiator in a “Closed Bomb”. Data is reported in seconds. SAE INTERNATIONAL J1538 Revised APR2015 Page 4 of 24 3.22 BALLISTIC TANK (See Tank Test 3.242) Test device used to measure ballistic per

26、formance of an inflator, refer to SAE J2238. Generally, pressure versus time is recorded. 3.23 BALLISTIC TEST Test to measure the performance of a gas generating device (inflator). Generally, pressure versus time is recorded. 3.24 BALLISTOMECHANICALLY CORRECT An electroexplosive device that conforms

27、 to cited specifications for dimensions, external materials, colors, and ballistic performance, but may deviate from electrical requirements. 3.25 BAM (Bundesanstalt fr Materialforschung und Prfung) The Federal Institute for Material Research and Testing, Berlin, Federal Republic of Germany. This ag

28、ency is Competent Authority for Europe. Website: http:/www.bam.de. 3.26 BARRIER TEST Vehicle crash test, with a fixed or moving barrier, to evaluate vehicle performance and occupant crash protection. 3.27 BINDER An additive intended to agglomerate one or more materials in a pyrotechnic composition.

29、3.28 BOMB (See also Closed Bomb 3.51 and Vented Bomb 3.257.) A fixture designed to accommodate an initiator and (optionally) a sensor for a Ballistic Test. 3.29 BONDWIRE A solid electrical conductor, typically Gold or Aluminum, used to bond a Monolithic Bridge to adjoining electrical conductors. 3.3

30、0 BONFIRE TEST The exposure of inflator and/or module assemblies to fire or associated high temperatures to determine structural integrity and/or hazardous effects when auto ignition occurs. 3.31 BREAKDOWN VOLTAGE The voltage at which a disruptive electrical discharge takes place through or over the

31、 surface of a dielectric. See IEEE STD-100-1992. 3.32 BRIDGE A 2-terminal element that heats an abutting pyrotechnic Ignition Charge to its reaction temperature when an electrical current is compelled to flow through same. The heating may result from the Joule Effect if the bridge is resistive or fr

32、om the Peltier Effect if the bridge incorporates a junction of dissimilar conductive materials. The term applies to implementations in the form of Bridgewires and Monolithic Bridges. 3.33 BRIDGE CIRCUIT The electrical network consisting of the Bridge and the initiators electrical terminations. SAE I

33、NTERNATIONAL J1538 Revised APR2015 Page 5 of 24 3.34 BRIDGE CIRCUIT RESISTANCE (BCR) The direct current (DC) electrical resistance of a 2-terminal initiator. Data is reported in ohms with test temperature noted. 3.35 BRIDGE REACTION TIME (BRT) The period of time elapsed from the onset of the firing

34、current to first indication of pyrotechnic ignition as observed in the voltage trace accompanying the firing current pulse. 3.36 BRIDGED PLUG A subassembly comprised of a PIug with a Bridge bonded thereon. 3.37 BRIDGEWIRE A Bridge formed from a length of drawn resistance wire. See MIL-HDBK-83578. 3.

35、38 BRISANCE The shattering effect achieved by pyrotechnic functioning of the initiator. 3.39 BRUCETON An Electrical Sensitivity Test as described in MIL-STD-331B, Test D2 (Projectile Fuse Arming Distance), 5.1.4 (Bruceton Method). 3.40 BURNING RATE The rate at which a solid pyrotechnic composition b

36、urns normal to its surface at a specified ambient pressure and temperature. 3.41 BURST TEST A pressurization test to determine strength of structural members (e.g., inflator assembly, bag). 3.42 BUS COMMAND A serially encoded message generated by the Restraint Control Module or Test Set and received

37、 by the Electronic Initiator via the Vehicle Restraint Bus. 3.43 BUS INTERFACE MODULE (BIM) In an Electronic Initiator, the electronic circuit package comprised of (1) the Encoder/Decoder Subsystem and (2) the Ignition Subsystem, said package providing a communications and control interface between

38、the Vehicle Restraint Bus and the Initiators pyrotechnic Squib. 3.44 CAB (also called IC, SABIC, RRAB, and HAB) Curtain Airbag (CAB) Generally fitted into the roof rails of the vehicle on both the driver and passenger sides. Provides a level of head impact protection and ejection mitigation dependin

39、g on cushion design characteristics, crash characteristics, and the vehicles crash sensing capabilities 3.45 CAN (See Housing, Module 3.130) SAE INTERNATIONAL J1538 Revised APR2015 Page 6 of 24 3.46 CANISTER A sealed device (generally hermetic) containing ignition train (initiator and/or propellant)

40、 and/or gas generant. May contain an inner filter. 3.47 Case An electrical node as designated on the initiators electrical schematic diagram, usually corresponding to a metallic mounting component or housing that is electrically isolated from the Bridge Circuit. 3.48 CCT “Continuing Conformance Test

41、ing” (See also LAT, 3.164). 3.49 CHARGE CUP An initiator component providing containment for the one or more of the pyrotechnic charges (also called Charge Can). 3.50 CHARGE SLEEVE (See Ignition Charge Holder 3.137.) 3.51 CLOSED BOMB A Bomb having a fixed-volume chamber that is gastight over the ful

42、l pressurization range for the initiator being tested. 3.52 COAXIAL A metallic squib or initiator is said to be coaxial if the pyrotechnic chamber has no more than two distinct electrical conductors, one being the metal casing that contains and encompasses the pyrotechnic material, and the other bei

43、ng an electrically isolated metal electrode, with the Bridge being bonded to each conductor so as to span an insulating gap between the two. Thus, any electrical potential applied between the two conductors results in a proportional current circulating through the Bridge Circuit. The term is used in

44、 the topological sense and does not imply physical symmetry of the squib components about a common axis. Compare to Twinaxial. 3.53 COLD GAS INFLATOR An inflator that contains a non-flammable gas mixture, and no pyrotechnics beyond the initiator. No heat is generated to expand or add to the gas that

45、 is stored in the inflator. 3.54 COMMON PIN (See Shield Pin 3.223.) In a metallic Squib, an initiator Pin bonded to the Bridge and electrically common to the Charge Cup. 3.55 COMPATIBILITY GROUP LETTER A designated alphabetical letter used to categorize different types of explosive substances and ar

46、ticles for purposes of stowage and segregation. See 49 CFR 171.8. 3.56 COMPETENT AUTHORITY “A national agency responsible under its national law for the control or regulation of a particular aspect of the transportation of hazardous materials (dangerous goods).” 49 CFR 171.8. SAE INTERNATIONAL J1538

47、 Revised APR2015 Page 7 of 24 3.57 COMPETENT AUTHORITY LETTER A letter issued by a Competent Authority (typically the DOT) that assigns the United Nations Proper Shipping name, Number and Explosive Classification Code for explosives and explosives devices. See 49 CFR 173.56 (New explosives definitio

48、n and procedures for classification and approval). 3.58 CONNECTION STYLE The initiator style as it pertains to the method of electrical connection to the vehicle wiring harness, e.g., Ieadwire-style, pin-style. 3.59 CONNECTOR A device that connects the vehicle wiring assembly to airbag components an

49、d associated hardware. 3.60 CONNECTOR PORT A socket shaped initiator feature that includes the squib pins, accommodates a mating electrical connector, and frequently includes a shorting clip. 3.61 CONNECTOR POSITION ASSURANCE (CPA) A connector feature that provides an indication that the connector is locked into the initiators connector port. Se