GB/T 7927-2007 English PDF

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GB/T 7927-2007: Method of vibration measurement for walking tractors
Status: Valid

GB/T 7927: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 7927-2007	189	Add to Cart	3 days	Method of vibration measurement for walking tractors	Valid
GB/T 7927-1987	359	Add to Cart	3 days	Method of measurement for walking tractor vibration	Obsolete

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Basic data

Standard ID: GB/T 7927-2007 (GB/T7927-2007)
Description (Translated English): Method of vibration measurement for walking tractors
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: T61
Classification of International Standard: 65.060.10
Word Count Estimation: 7,774
Date of Issue: 2007-06-25
Date of Implementation: 2007-11-01
Older Standard (superseded by this standard): GB/T 7927-1987
Regulation (derived from): National Standard Announcement 2007 No.6 (Total No.106) (National-Standard-Commission)
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary: This standard specifies the methods of measurement tractor handlebar vibration. This standard applies to tractor handlebar vibration measurements on a standard road test carried out.

GB/T 7927-2007: Method of vibration measurement for walking tractors

---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.
Method of vibration measurement for walking tractors ICS 65.060.10 T61 National Standards of People's Republic of China Replacing GB/T 7927-1987 Tractor vibration measurement method Posted 2007-06-25 2007-11-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard replaces GB/T 7927-1987 "tractor vibration measurement method." This standard compared with GB/T 7927-1987, the main technical difference is. --- In the standard 6.1 opponents of the vibration frequency weighting factor has been revised; --- In this test track to standard 5.4 "in line with GB/T 10910-2004 provisions 100m smoother track"; --- In the standard 6.2 increases the total weighted calculation handlebar vibration acceleration. From the date of implementation of this standard, instead of GB/T 7927-1987. Appendix A of this standard is a normative appendix. The standard proposed by China Machinery Industry Federation. This standard by the National Standardization Technical Committee of the tractor. This standard was drafted. Luoyang Tractor Research Institute, National Tractor Quality Supervision and Inspection Center. The main drafters of this standard. Ren Yueguang, WEAR BEHAVIORS. This standard replaces the standards previously issued as follows. --- GB/T 7927-1987. Tractor vibration measurement method

1 Scope

This standard specifies the standard road test, measurement methods tractor handlebar vibration. This standard applies to the measurement of vibration handle tractor on a standard road test carried out.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard. GB/T 2298 Mechanical vibration and shock term (GB/T 2298-1991, neq ISO 2041.1990) GB/T 10910-2004 Agricultural wheeled tractors and field machinery - Measurement of whole-body vibration driver (ISO 5008.2001, NEQ) ISO 5349-1.2001 Mechanical vibration of human exposure to hand-transmitted vibration measurement and evaluation methods - Part 1. General requirements 3 Terms, definitions, symbols and abbreviations 3.1 Terms and Definitions Terms and definitions GB/T 2298 regulations apply to this standard. 3.2 Symbols and Abbreviations This standard uses the following symbols and abbreviations. Second (m/s2); Rao hV --- Total handle vibration frequency weighted acceleration in meters per second squared (m/s2); fh --- handlebar vibration frequency weighting factor.

4 measuring instruments

4.1 General requirements Sensor measuring system may be (typically an acceleration sensor), amplifiers and filters, telemetry, recorder (digital or analog type Type) composition. Measurement system shall be capable of measuring acceleration rms value of 0.1m/s2 ~ 50m/s2, crest factor of not more than 6 vibration. measuring system The error in the frequency range 8Hz ~ 1000Hz shall be the actual acceleration level of rms vibration ± 2.5%. 4.2 Sensor Measurement handle vibration acceleration sensors, should be adopted holder fastened to the front end of the tractor right hand sleeve, the sensor pick-up direction Figure 1 should be the X-axis, Y-axis and Z-axis direction. Mass acceleration sensor holder and not more than 350g. 4.3 Calibration Before and after the vibration measurement, the entire measurement system accelerometer calibration source calibration. Acceleration calibration source to produce at a known frequency Acceleration of known size. In addition to regular calibration (for example, every two years), but after any major component measurement system from accidental operation also must be calibrated, and note Record calibration results. ......

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