GB/T 7927-2007Method of vibration measurement for walking tractors (English PDF)

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.

4.1 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.