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GB/T 41971-2022 English PDF

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US$189.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 41971-2022: Agricultural and forestry tractors - Measurement of noise emitted when in motion
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 41971-2022	189	Add to Cart	3 days	Agricultural and forestry tractors - Measurement of noise emitted when in motion	Valid

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Basic data

Standard ID: GB/T 41971-2022 (GB/T41971-2022)
Description (Translated English): Agricultural and forestry tractors - Measurement of noise emitted when in motion
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: T61
Classification of International Standard: 65.060.10
Word Count Estimation: 10,151
Date of Issue: 2022-10-14
Date of Implementation: 2022-10-12
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 41971-2022: Agricultural and forestry tractors - Measurement of noise emitted when in motion

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 65.060.10 CCST61 National Standards of People's Republic of China Dynamic noise measurement of agricultural and forestry tractors (ISO 7216.2015, MOD) Published on 2022-10-12 2022-10-12 Implementation State Administration for Market Regulation Released by the National Standardization Administration

foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules of Standardization Documents" drafted. This document is modified and adopted ISO 7216.2015 "Measurement of Dynamic Noise of Agriculture and Forestry Tractors". The technical differences between this document and ISO 7216.2015 and their reasons are as follows. --- Change "agricultural tractor" to "agricultural and forestry tractor" (see 3.1), consistent with the terminology used in this document; --- In the "Terms and Definitions" chapter, "uncounterweight tractor mass" is deleted, the term is not used in this document; --- Delete the force measurement unit and allowable error in Table 1, this item is not used in this document; --- Increase the speed measurement unit and allowable error (see Table 1), the tractor driving speed has an impact on dynamic noise; --- Replaced IEC 61672-1 with the normatively cited GB/T 3785.1, GB/T 15173 replaced IEC 60942 (see 5.1, 5.2), in order to adapt to the technical conditions of our country and increase the operability; --- Added the specific requirements for the acoustic calibrator to calibrate the acoustic measurement system (see 5.2) to ensure the accuracy of the measurement; --- Increase the temperature and wind speed regulations for measuring environmental conditions (see 6.2.1) to ensure the operability and accuracy of the measurement; --- Added provisions for the driving state of the tractor (see 8.1) to facilitate the test operation; --- Added provisions for engine calibration power and maximum idle speed (see 8.2) to ensure the operability and accuracy of measurement; --- Added the provisions for the highest gear of the tractor (see 8.3) to ensure the operability of the measurement; --- Added the record of tractor speed and engine speed (see 9.2), which helps to better characterize the operation of the tractor during the test state; --- Increase the provisions when the tractor does not reach the maximum speed when driving between the AA line and the BB line (see 9.3) to ensure that the test Quantitative operability and accuracy; --- Changed the processing provisions of the measurement results (see 10.2) to ensure the accuracy and scientificity of the measurement results. The following editorial changes have been made to this document. --- Replaced ISO 6814 with GB/T 19365 cited for information (see Chapter 1); --- Added an example of the content of the brief description of the silencing system [see 11e)] to ensure the repeatability of the test measurement; --- Deleted Appendix A (informative) introduction to the maintenance organization. Please note that some content of this document may be patented. The issuing agency of this document assumes no responsibility for identifying patents. This document is proposed by China Machinery Industry Federation. This document is under the jurisdiction of the National Tractor Standardization Technical Committee (SAC/TC140). This document is drafted by. Luoyang Tractor Research Institute Co., Ltd., Luoyang Xiyuan Vehicle and Power Inspection Institute Co., Ltd., Jiamusi Jichi Tractor Manufacturing Co., Ltd., Liuzhou Institute of Technology, Jiangsu Yueda Intelligent Agricultural Equipment Co., Ltd., Shandong Shifeng (Group) Co., Ltd. The main drafters of this document. Zhao Yirong, Chen Song, Chen Xiangfeng, Lai Yuhuo, Liao Hanping, Yang Jisheng, Guo Xiaobo, Zhao Junjie, Zhai Guoqing, Huang Yan, Lu Fengxiang, Lin Lianxun, Guo Junwei, Li Yanbo, Lin Weijian, Zhang Xiaodan, Qiao Jianxiang, Liu Ke. Dynamic noise measurement of agricultural and forestry tractors

1 Scope

This document specifies the dynamic noise measurement method of A-weighted sound pressure level of agricultural and forestry tractors, and the operation of dynamic noise measurement of agricultural and forestry tractors conditions to ensure that the measured result is a realistic and repeatable maximum noise. This document applies to agricultural and forestry tractors equipped with elastic tires or rubber tracks. This document does not apply to special forestry machinery, such as GB/T 19365 defined transport aircraft, skidders, etc. and agricultural and forestry tractors equipped with steel tracks. Note. The acoustic environment required by this measurement method can only be an open space.

2 Normative references

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, dated citations documents, only the version corresponding to that date applies to this document; for undated references, the latest edition (including all amendments) applies to this document. GB/T 3785.1 Electroacoustic Sound Level Meter Part 1.Specification (GB/T 3785.1-2010, IEC 61672-1..2002, IDT) GB/T 15173 Electroacoustic Acoustic Calibrator (GB/T 15173-2010, IEC 60942.2003, IDT)

3 Terms and Definitions

The following terms and definitions apply to this document. 3.1 Wheeled or tracked with at least two axles, specially designed for towing agricultural trailers and towing, propulsion, carrying and driving capable of being dismantled Self-propelled agricultural vehicle for unloading agricultural and forestry implements from the loading platform. Note. The maximum design speed of agricultural vehicles is not less than 6km/h, and can be equipped with one or more seats.

4 Measurement units and allowable errors

The measurement units and allowable errors of this document are shown in Table 1. Table 1 Measurement units and allowable errors Project unit tolerance Speed r/min ±0.5% Time s ±0.2 Distance m or mm ±0.5% Mass kg ±0.5% Atmospheric pressure kPa ±0.2 Tire pressure kPa ±5% Speed km/h ±1% ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 41971-2022_English be delivered?

Answer: Upon your order, we will start to translate GB/T 41971-2022_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 41971-2022_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 41971-2022_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.