Interferometric evaluation of the sensitivity of accelerometers to differential heating

Gustavo P. Ripper; Ronaldo S. Dias; Guilherme A. Garcia

doi:10.1117/12.803342

17 June 2008 Interferometric evaluation of the sensitivity of accelerometers to differential heating

Gustavo P. Ripper, Ronaldo S. Dias, Guilherme A. Garcia

Proceedings Volume 7098, Eighth International Conference on Vibration Measurements by Laser Techniques: Advances and Applications; 70981L (2008) https://doi.org/10.1117/12.803342
Event: Eighth International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, 2008, Ancona, Italy

Abstract

Laser interferometry is the preferred method currently used by National Metrology Institutes for primary calibration of accelerometers. Highly accurate calibrations require well controlled environmental conditions. Laboratories usually focus on the control of ambient air temperature and humidity. Another important source of influence is the vibration exciter, which besides uniaxial motion can generate undesirable secondary effects. This paper will treat the problem of differential heating of an accelerometer under calibration, when caused by a rise in temperature of the vibrator moving element. A simple device used to evaluate the change in the charge sensitivity of an accelerometer due to heating through its mounting base is presented. The sensitivity to differential heating can then be determined by the use of accurate interferometric methods. The knowledge of this sensitivity enables the calibration laboratory to correct the calibration results obtained with vibration exciters, which exhibit significant temperature variations. For instance, some commercial models can present variations higher than 20 °C, when the Bessel function J1 minimum-point method is applied. The experimental setup, which has been developed at INMETRO to evaluate this characteristic is described and some measurement results are presented.

Citation Download Citation

Gustavo P. Ripper, Ronaldo S. Dias, and Guilherme A. Garcia "Interferometric evaluation of the sensitivity of accelerometers to differential heating", Proc. SPIE 7098, Eighth International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, 70981L (17 June 2008); https://doi.org/10.1117/12.803342

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available