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JJG 1184-2022 English PDFStandard Briefing:Stadard ID: JJG 1184-2022Stadard Title: Detection Systems for Vehicle Honking Price (USD): 529 Lead day (Deliver True-PDF English version): 4 days Status: Valid
Basic Data:
Contents, Scope, and Excerpt:JJG 1184-2022 Detecting Systems for Vehicle Honking National Metrology Verification Regulations of the People's Republic of China Motor Vehicle Horn Monitoring System Released on 2022-04-29 Implementation on 2022-10-29 Released by the State Administration for Market Regulation Verification regulations for motor vehicle whistle monitoring system Responsible unit. National Acoustic Metrology Technical Committee Main drafting unit. China Institute of Metrology Jilin Institute of Metrology China Jiliang University Shanghai Qigao Electronic Technology Co., Ltd. Participating in the drafting unit. Zhejiang Institute of Metrology Aviation Industry Beijing Great Wall Metrology and Testing Technology Research Institute This regulation entrusts the National Acoustic Metrology Technical Committee to be responsible for interpretation Drafters of this regulation. Niu Feng (National Institute of Metrology) Fang Facheng (Jilin Institute of Metrology) He Longbiao (National Institute of Metrology) Wang Yuebing (China Jiliang University) Zhang Nanxiong (Shanghai Qigao Electronic Technology Co., Ltd.) Participating drafters. Yao Lei (Zhejiang Institute of Metrology) Zhang Bingyi (Beijing Great Wall Metrology and Testing Technology Research Institute of Aviation Industry) Table of contents Introduction (Ⅱ) 1 range(1) 2 References(1) 3 Terms and units of measurement(1) 3.1 Units of measurement(1) 3.2 Terms and Definitions(1) 4 Overview(2) 5 Metrological performance requirements (2) 5.1 Measurement error of sound pressure level (2) 5.2 Spatial resolution(2) 5.3 Positioning error(3) 5.4 Effective recognition area (3) 5.5 Temporal consistency of acousto-optic images (3) 6 General technical requirements (3) 6.1 Signs(3) 6.2 Visual and functional inspection (3) 7 Measuring Instrument Control(3) 7.1 Test conditions (3) 7.2 Verification items (4) 7.3 Verification method (5) 7.4 Processing of verification results (7) 7.5 Verification period(7) Appendix A Format of inner pages of verification certificate and verification result notification (8) Appendix B Evaluation Example of Measurement Uncertainty (16) introduction JJF1002 "Rules for Writing National Metrology Verification Regulations", JJF1001 "General Metrology Terms and Definitions", JJF1059.1 "Assessment and Expression of Measurement Uncertainty" together constitute the basic series supporting the formulation of this regulation document. The sound pressure level and frequency of motor vehicle whistle in this regulation refer to GB 7258-2017 "Motor Vehicle Operation Safety Technology" "Technical Conditions" and GB 15742-2019 "Performance Requirements and Test Methods for Motor Vehicle Horns" Require. This regulation stipulates two main measurement characteristics of positioning error and time consistency of sound and light images. Among them, the lateral (X direction) limit of the positioning error is selected as 0.6m, mainly considering the fact that two cars are parallel The shortest possible distance when driving; the longitudinal (Y direction) limit value is selected as 1.5m, mainly considering the length of the vehicle body and the workshop The total length of the distance (the license plate of the rear vehicle is not blocked by the vehicle in front) is generally not less than 6m. Because the speed of sound is much smaller than the speed of light, the sound source location unit in the motor vehicle whistle monitoring system has already produced a signal when it detects the whistle sound. There is a delay of nearly 100ms, and the acquisition time of the acoustic positioning image and the optical image may not match. The metering characteristics of the time consistency of the sound and light images are ensured, so as to prevent the motor vehicle whistle monitoring system from appearing when driving. Misjudgment. This regulation is published for the first time. Verification regulations for motor vehicle whistle monitoring system 1 Scope This regulation applies to the initial verification, subsequent verification and in-use inspection of the motor vehicle whistle monitoring system. 2 References This procedure references the following documents. JJG 175 working standard microphone (electrostatic actuator method) JJG 176-2005 Acoustic calibrator JJG 188-2017 Sound Level Meter JJF1001-2011 general measurement terms and definitions JJF1034-2020 Acoustic Metrology Terms and Definitions JJF1059.1-2012 Evaluation and Expression of Measurement Uncertainty JJF1147-2006 Specification for calibration of acoustic characteristics of anechoic and semi-anechoic rooms JJF1496-2014 Calibration specification for sound source identification and localization system (beam forming method) GB/T 3102.7 Acoustic quantities and units GB/T 3222.1-2006 Description, Measurement and Evaluation of Acoustic Environmental Noise Part 1.Basic Parameters and evaluation method GB/T 3947-1996 Acoustic Terminology GB 7258-2017 Motor Vehicle Operation Safety Technical Conditions GB 15742-2019 Performance requirements and test methods for motor vehicle horns GB/T 17247.1-2000 Acoustics Outdoor Sound Propagation Attenuation Part 1.Calculation of Atmospheric Sound Absorption GB/T 17247.2-1998 Acoustics Outdoor Sound Propagation Attenuation Part 2.General Calculation Method GB/T 20441.4-2006 Measurement microphones Part 4.Specifications for working standard microphones For dated references, only the dated version applies to this regulation; for undated references document, its latest version (including all amendments) applies to this regulation. 3 Terminology and units of measurement 3.1 Unit of measurement This regulation adopts the quantities and units specified in GB/T 3102.7. 3.2 Terms and Definitions The following terms and definitions defined in JJF1001-2011, JJF1034-2020 and GB/T 3947-1996 apply used in this procedure. A device for identifying, locating and recording the sound source of motor vehicle whistle. Note. Honk is also called honk. ...... |