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 2017 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:/standards.sae.org/J1192_201712 SURFACE VEHICLE RECOMMENDED PRACTICE J1192 DEC2017 Issued 2010-11 Revised 2017-12
5、 Superseding J1192 NOV2010 Performance of Audible Warning Devices (Horns) for Motorcycles RATIONALE This document was revised as follows: The title was revised for clarity. The maximum height requirement for grass in the test area was eliminated. A section was added for definitions and other minor c
6、hanges were made for conformity with SAE style and content guidelines. FOREWORD This SAE Standard establishes requirements and test procedures for the operational life, corrosion resistance, and sound pressure level output of motorcycle electric and electro pneumatic Audible Warning Devices (AWD). T
7、est equipment, environment, and procedures are specified. Requirements for sound output after completion of life cycle and corrosion resistance tests, and a required minimum sound pressure level output as installed on the motorcycle are included. Two types of tests are specified: “Laboratory,“ to as
8、sess AWD durability, and “Vehicle,“ to assess AWD in-use acoustic performance. 1. SCOPE The requirements of this document apply to all classes of motorcycles as defined in SAE J213. 1.1 Purpose This document specifies performance and longevity requirements for motorcycle AWDs with the goal of enhanc
9、ing the safety of vehicles and vulnerable road users. SAE INTERNATIONAL J1192 DEC2017 Page 2 of 7 2. REFERENCES 2.1 Applicable Documents The following standards contain provisions which, through reference in this text, constitute provisions of this recommended practice. At the time of publication, t
10、he editions indicated were valid. All standards are subject to revision, and users of this recommended practice are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid Internatio
11、nal Standards. 2.1.1 SAE Publication Available from SAE International, 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 J184 Qualifying a Sound Data Acquisition System SAE J213 Motorcycle Classifications 2
12、.1.2 ASTM Publications Available from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959, Tel: 610-832-9585, www.astm.org. ASTM B117 Salt Spray (Fog) Testing 2.1.3 ANSI Publications Copies of these documents are available online at http:/webstore.ansi.org/ ANS
13、I/ASA S1.4 PART 1/IEC 61672:1 American National Standard Electroacoustics - Sound Level Meters - Part 1: Specifications (a nationally adopted international standard) ANSI/ASA S1.40American National Standard Specifications and Verification Procedures for Sound Calibrators 3. DEFINITIONS 3.1 SHALL A m
14、andatory requirement. 3.2 SHOULD Suggested or advisory, but not required. 3.3 MAY Permitted, but not required. 3.4 Abbreviations Audible warning device AWD Direct current DC Sound pressure level SPL SAE INTERNATIONAL J1192 DEC2017 Page 3 of 7 4. REQUIREMENTS 4.1 Component Level Requirements 4.1.1 En
15、durance After completing the endurance test specified in 5.3.1, the AWD when tested per 4.2 shall produce a sound pressure level of at least 103 dB(A). 4.1.2 Salt Spray After completing the salt spray exposure specified in 5.3.2, the AWD when tested per 4.2 shall produce a sound pressure level of at
16、 least 103 dB(A). 4.2 Vehicle Level Specifications When tested on the motorcycle as specified in 5.4, the AWD shall produce a sound pressure level of at least 85 dB(A). 5. TEST METHODS AND PROCEDURES 5.1 General Instrumentation The following instrumentation shall be used: A sound level meter meeting
17、 the Type 1, Type S1A, Type 2, or Type S2A requirements of ANSI/ASA S1.4 -2014 / PART 1 / IEC 61672:1 or ANSI S1.4-1983 (R2006) or ANSI S1.4 1983. The meter shall be set on A weighting scale and fast response. 5.1.1 As an alternative to making direct measurements using a sound level meter, a microph
18、one or sound level meter may be used with a recorder or other indicating instrument, provided the system meets the requirements of SAE J184. 5.1.2 A sound level calibrator with an accuracy of 0.5 dB conforming to ANSI/ASA S1.40-2006 (R2011) ANSI S1.401984 (R1997). 5.1.3 A windscreen which does not a
19、ffect microphone response more than 1 dB for frequencies of 63 to 4000 Hz and 1.5 dB for frequencies of 4000 to 10 000 Hz. 5.1.4 An anemometer with steady-state accuracy of 10% at 9 m/s (20 mph). 5.1.5 For additional general comments see Appendix A. 5.2 Component Level Tests Perform off-vehicle test
20、s using the facility, power supplies and sound measuring equipment noted as follows. SAE INTERNATIONAL J1192 DEC2017 Page 4 of 7 5.2.1 Test Facility Laboratory tests shall be made outdoors or in an acoustic chamber as follows. 5.2.1.1 Outdoor Laboratory The outdoor test facility, if used, shall cons
21、ist of a flat, open space free of large sound-reflecting surfaces (other than the ground) such as parked vehicles, signboards, buildings, or hillsides located within 5 m (16 feet) of the AWD being tested and the location of the sound level meter microphone. The area between the microphone and the AW
22、D shall be paving or hard-packed earth, level within an average slope of 40 mm/m (0.5 inch/feet) and shall be free of loose or powdered snow, plowed soil, grass, trees, or other extraneous material. 5.2.1.2 Acoustic Chamber The acoustic chamber, if used, should be constructed of material with an abs
23、orption coefficient of at least 90% down to a frequency at least 1 octave lower than the dominant frequency of the AWD under test. 5.2.2 Test Conditions 5.2.2.1 During component level testing the AWD shall be powered by a DC power supply system which shall furnish regulated and filtered direct curre
24、nt, such that the voltage measured at the AWD terminals, with the AWD operating shall be as noted in Table 1. Table 1 - DC power supply specifications Rated Voltage Supply Voltage 6 V 6.5 0.2 V 12 V 13.0 0.2 V 24 V 26.0 0.2 V 5.2.2.2 The AWD and the measurement microphone shall be mounted 1.2 m 15 c
25、m (4 feet 6 inch) from the ground plane, separated by 2 m 0.08 m (6 feet 7 in 3 inch) with the microphone on the acoustical axis (highest output) of the AWD. 5.2.2.3 The AWD shall be mounted to a rigid, non-reflecting surface. 5.2.2.4 During the test, the ambient temperature shall be 15 to 30 C (59
26、to 86 F). 5.2.2.5 Outdoor measurements shall be made only when the wind velocity does not exceed 19 km/hour (12 mph). 5.2.2.6 No persons other than an observer reading the meter shall be within 3 m (10 feet) of the AWD or microphone. 5.2.2.7 The ambient sound pressure level coming from sources other
27、 than the AWD being measured, including wind, shall be at least 10 dB(A) lower than the measured level of the AWD being tested. When engine sound makes the 10 dB(A) differential impossible, the test may be run and the measurement corrected according to the principles for combining decibel signal lev
28、els, provided the result is identified as having been corrected, the correction method is identified, and the observed data is provided (see Appendix A). 5.2.3 Test Procedures 5.2.3.1 The sound output shall be measured during a 1 to 2 seconds period of operation. The applicable reading shall be the
29、highest sound pressure level attained ignoring unrelated peaks due to extraneous ambient sounds. 5.2.3.2 At least six sound pressure level measurements shall be made with at least 2 minutes between measurements. The highest and lowest shall be discarded, and the remaining shall be averaged to obtain
30、 the reported value. SAE INTERNATIONAL J1192 DEC2017 Page 5 of 7 5.3 Endurance and Corrosion Resistance Testing 5.3.1 Endurance A new AWD shall be operated for 50000 cycles, each cycle consisting of 1 second on and 4 seconds off. The AWD may be adjusted to the manufacturers specifications before con
31、ducting the test but not thereafter. During test, the ambient temperature shall be 15 to 30 C (59 to 86 F). 5.3.2 Corrosion Resistance A new AWD shall be installed in a salt spray cabinet capable of containing the AWD to be tested and meeting the requirements of ASTM B 117, Salt Spray (Fog) Testing.
32、 The AWD shall be subjected to a salt spray test in accordance with ASTM B 117, Salt Spray (Fog) Testing, for 72 hours. 5.4 Vehicle Level Tests The vehicle mounted test assesses new AWD performance with the AWD mounted as specified by the motorcycle manufacturer. Test specifics are as follows. 5.4.1
33、 Motorcycle Test Site The motorcycle test site shall be a flat, open space, free of large sound-reflecting surfaces (other than the ground) such as parked vehicles, signboards, buildings, or hillsides located within 30 m (100 feet) of the motorcycle being tested and the location of the sound level m
34、eter microphone. The area between the microphone and the motorcycle shall be a lane at least 3.7 m (12 feet) wide of paving or hard-packed earth, level within an average slope of 40 mm/m (0.5 inch/feet) and shall be free of loose or powdered snow, plowed soil, grass, trees, or other extraneous mater
35、ial. 5.4.2 Test Conditions 5.4.2.1 A sound level meter microphone shall be located 15 m 15 cm (50 feet 6 inch) in front of the forward most point of the motorcycle on the motorcycle center line, at a height of 1.2 m 15 cm (4 feet 6 inch) above the ground. 5.4.2.2 The motorcycle engine should be oper
36、ated for at least 15 minutes to stabilize conditions before the test. The motorcycle electrical system shall be the only power supply for the AWD. 5.4.2.3 Motorcycle lighting and electrical equipment which is normally on during typical night time operation shall be operating during AWD testing. 5.4.
37、2.4 No persons other than an observer reading the meter and an operator on the operators position shall be within 3 m (10 ft) of the vehicle or microphone. 5.4.2.5 The ambient sound pressure level coming from sources other than the AWD being measured, including wind sound, shall be at least 10 dB(A)
38、 lower than the measured level of the AWD being tested. When engine sound makes the 10 dB(A) differential impossible, the test may be run and the measurement corrected according to the principles for combining decibel signal levels, provided the result is identified as having been corrected, the cor
39、rection method is identified, and the observed data is provided (see Appendix A). 5.4.2.6 Measurements shall be made only when wind velocity does not exceed 19 km/hour (12 mph), and temperature is between 15 and 30 C (59 and 86 F). 5.4.3 Test Procedures 5.4.3.1 Measure sound output while operating t
40、he AWD via the motorcycle AWD switch for 1 to 2 seconds. The applicable reading shall be the highest sound pressure level attained ignoring unrelated peaks due to extraneous ambient sounds. 5.4.4 At least six sound pressure level measurements shall be made with at least 2 minutes between measurement
41、s. The highest and lowest shall be discarded, and the remaining shall be averaged to obtain the reported value. SAE INTERNATIONAL J1192 DEC2017 Page 6 of 7 6. NOTES 6.1 Revision Indicator A change bar (l) located in the left margin is for the convenience of the user in locating areas where technical
42、 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 con
43、tain editorial changes only. PREPARED BY THE SAE MOTORCYCLE TECHNICAL STEERING COMMITTEE SAE INTERNATIONAL J1192 DEC2017 Page 7 of 7 APPENDIX A A.1 GENERAL INFORMATION Proper use of all test instrumentation is essential to obtain valid measurements. Operating manuals or other literature furnished by
44、 the instrument manufacturer should be referred to for both recommended operation of the instrument and precautions to be observed. Specific items to be considered are: A.1.1 The type of microphone, its directional response characteristics, and its orientation relative to the ground plane and the so
45、und source. A.1.2 The effects of ambient weather conditions on the performance of all instruments (e.g., temperature, humidity and barometric pressure. A.1.3 Proper signal levels, terminating impedance, and cable lengths on multi-instrument measurement systems. A.1.4 Proper acoustical calibration pr
46、ocedure, to include the influence of extension cabled, etc. Field calibration shall be made immediately before and after each test sequence. Internal calibration is accomplished immediately before and after each day. A.1.5 The effect of air temperature gradients over paved test courses on day of int
47、ense sunlight. A.2 SOUND PRESSURE LEVEL CALCULATIONS If there is less than 10 dB(A) difference between the measured and ambient sound pressure levels use the following equation to calculate the sound pressure level: = 10 10 (1010 1010 ) (Eq. A1) where: SPLAWD = Sound pressure level of the AWD SPLtot
48、al = Combined sound pressure level of the AWD and ambient SPLambient = Ambient sound pressure level Example: SPLambient 78 dB(A) SPLtotal 85 dB(A) SPLAWD = 1010(108.5 107.8) = 84 dB(A) Any method used must be identified, and the uncorrected average ambient sound level and observed sound pressure level reported.
