GB/T 20485.31-2011
Methods for the calibration of vibration and shock transducers.Part 31:Testing of transverse vibration sensitivity (English Version)

Standard No.

GB/T 20485.31-2011

Language

Chinese, Available in English version

Release Date

2011

Published By

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China

Latest

GB/T 20485.31-2011

Replace

GB/T 13823.8-1994

Scope

This part of GB/T 20485 specifies the instruments, equipment and methods for lateral vibration sensitivity testing. This method is suitable for linear velocity and acceleration sensors. This section gives the method and procedure for testing the sensitivity (see Appendix A) of the sensor vibrating in a plane perpendicular to the direction of the sensitive geometric axis. Since the magnitude of the lateral sensitivity varies with the vibration orientation, there are many ways to determine its maximum value. The maximum value of the ratio of the lateral sensitivity to the geometric axis sensitivity of the sensor is the maximum lateral sensitivity, and the angle at this time is also the azimuth angle of the sensor's maximum lateral sensitivity. The methods and techniques given in this part realize the one-time installation of the sensor during the test, avoiding the large measurement uncertainty caused by repeated installation of the sensor. This part proposes three different test methods: uniaxial vibration excitation method, biaxial vibration excitation method and triaxial vibration excitation method. The three-axis vibration excitation method measures the lateral and geometrically sensitive direction sensitivities simultaneously, thereby simulating the multi-axial vibrations experienced by the sensor in the real environment. The frequency range applicable to this section is 1Hz to 5kHz, and the dynamic range is 1m/s² to 1000m/s² (depending on frequency) and 1mm/s to 1m/s (depending on frequency). While all of the systems mentioned above can achieve these measurement ranges, each specific system usually has its limitations, and its practical use range is much smaller. The methods given in this section refer to the transverse sensitivity obtained by comparing the output of the sensor and the laser interferometer. The expanded uncertainty of the transverse sensitivity given in this section is 0.1% (inclusion factor k=2), if expressed as a percentage of transverse sensitivity and sensor sensitivity, the uncertainty will be smaller.

GB/T 20485.31-2011 Referenced Document

• GB/T 20485.1-2008 Methods for the calibration of vibration and shock transducers.Part 1:Basic concepts
• ISO 266 Acoustics - Preferred frequencies

GB/T 20485.31-2011 history

• 2011 GB/T 20485.31-2011 Methods for the calibration of vibration and shock transducers.Part 31:Testing of transverse vibration sensitivity
• 1994 GB/T 13823.8-1994 Methods for the calibration of vibration and shock pick-ups Testing of transverse vibration sensitivity

GB/T 20485.31-2011 Methods for the calibration of vibration and shock transducers.Part 31:Testing of transverse vibration sensitivity has been changed from GB/T 13823.8-1994 Methods for the calibration of vibration and shock pick-ups Testing of transverse vibration sensitivity.

GB/T 20485.31-2011 -All Parts