GB/T 20485.11-2006
Methods for the calibration of vibration and shock transducers. Part 11: Primary vibration calibration by laser interferometry (English Version)

Standard No.

GB/T 20485.11-2006

Language

Chinese, Available in English version

Release Date

2006

Published By

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

Latest

GB/T 20485.11-2006

Replace

GB/T 13823.2-1992

Scope

This standard specifies the instrumentation and operating procedures for calibrating linear accelerometers (with or without amplifiers) by the absolute method, and methods for obtaining the amplitude and phase shift of the accelerometer's complex sensitivity using steady-state sinusoidal vibration and laser interferometry. The applicable frequency range of this part is 1Hz～10kHz, and the dynamic range (amplitude) is 0.1m/s²～1000m/s² (depending on the frequency). The measurement uncertainty specified in Chapter 3 of this part covers the above range. If the calibration frequency is lower than 1Hz (for example: the reference frequency in other international standards is 0.4Hz) and the acceleration amplitude is less than 0.1m/s² (for example: 0.004m/s² for 1Hz) , a suitable low-frequency vibrating table can be selected, and method 3 specified in this section can be used. Method 1 (fringe counting method) is suitable for calibration of sensitivity amplitude in the frequency range of 1Hz to 800Hz. Under special conditions, it can be used in higher frequency bands (see Chapter 8). Method 2 (minimum point method) is applicable to the sensitivity amplitude calibration in the frequency range of 800Hz～10kHz (see Chapter 9). Method 3 (sinusoidal approximation method) is suitable for the calibration of sensitivity amplitude and phase shift in the frequency range of 1 Hz to 10 kHz (see Chapter 10). Method 1 and method 3 require calibration at different frequency points and fixed acceleration amplitudes. Method 2 requires calibration at a fixed displacement magnitude (where the acceleration magnitude varies with frequency).

GB/T 20485.11-2006 Referenced Document

• GB/T 13823.1-2005 Methods for the calibration of vibration and shock transducers.Part 1:Basic concepts
• GB/T 3240-1982 Preferred frequencies for the acoustical measurement
• ISO 2041 Mechanical vibration, shock and condition monitoring - Vocabulary*， 2018-10-01 Update

GB/T 20485.11-2006 history

• 2006 GB/T 20485.11-2006 Methods for the calibration of vibration and shock transducers. Part 11: Primary vibration calibration by laser interferometry
• 1992 GB/T 13823.2-1992 Methods for the calibration of vibration and shock pick-ups. Primary vibration calibration by laser interferometry

GB/T 20485.11-2006 Methods for the calibration of vibration and shock transducers. Part 11: Primary vibration calibration by laser interferometry has been changed from GB/T 13823.2-1992 Methods for the calibration of vibration and shock pick-ups. Primary vibration calibration by laser interferometry.

GB/T 20485.11-2006 -All Parts