Measurement Uncertainty in Primary Calibration of Accelerometer Complex Sensitivity at Low Frequencies

The paper presents a case study pertaining to the analysis of factors affecting the measurement uncertainty in primary calibration of accelerometers at lower frequencies in range of 0.1 to 40 Hz using low-frequency primary vibration calibration standard realized at CSIR-National Physical Laboratory, India. The potential high accuracy and precision in measurement are achieved with a long-stroke exciter, APS 113AB having lowest transverse motion and by data acquisition at a high sampling rate and digital band pass filtering. The study evaluates the measurement uncertainty in accelerometer complex sensitivity including phase determination using a laser interferometer and an optical encoder. A comparison of the results of a laser interferometer and an optical encoder is presented. The measurement uncertainty in the sensitivity determination and phase measurements using both these approaches is validated from the results of participation in an international key comparison exercise.

[1]  Ying Wang,et al.  Monocular Vision-Based Earth’s Graviation Method Used for Low-Frequency Vibration Calibration , 2020, IEEE Access.

[2]  Hans-Jürgen von Martens.  Invited Article: Expanded and improved traceability of vibration measurements by laser interferometry , 2013 .

[3]  Lixue Wu,et al.  Generation of low-frequency vibration using a cantilever beam for calibration of accelerometers , 2006 .

[4]  Michael Mende,et al.  Calibration of Very-Low-Frequency Accelerometers A challenging task , 2011 .

[5]  Holger Nicklich,et al.  Primary vibration calibration by laser interferometry: requirements, problems, and first experience with a new calibration system , 2002, International Conference on Vibration Measurements by Laser Techniques: Advances and Applications.

[6]  Naveen Garg,et al.  Measurement Uncertainty in Vibration Calibration in Frequency Range of 5 Hz to 10 kHz , 2020 .

[7]  Gustavo P. Ripper,et al.  An interferometric accelerometer calibration system with flexible acquisition rate and recursive moving average filtering , 2006, International Conference on Vibration Measurements by Laser Techniques: Advances and Applications.

[8]  D. A. Scott,et al.  Distortion effects in primary calibration of low-frequency accelerometers , 2014 .

[9]  P L Heydemann,et al.  Determination and correction of quadrature fringe measurement errors in interferometers. , 1981, Applied optics.

[10]  Zhangwei Chen,et al.  A fast vibration-level adjustment method for low-frequency vibration calibration based on modified filtered-x least mean square algorithm , 2020 .

[11]  Hans-Juergen von Martens.  Evaluation of uncertainty in interferometric vibration measurements , 2000 .

[12]  Hyu-Sang Kwon,et al.  Final report on key comparison APMP.AUV.A-K3 , 2012 .

[13]  Krzysztof Stypuła,et al.  Kalibracja przetworników drgań na podstawie normy ISO 16063-21: Methods for the calibration of vibration and shock transducers – Part:21 Vibration calibration by comparison to a reference transducer , 2015 .

[14]  Wen He,et al.  A novel vibration-level-adjustment strategy for ultralow-frequency vibration calibration based on frequency-shifted method , 2013 .

[15]  Ying Wang,et al.  Monocular vision-based low-frequency vibration calibration method with correction of the guideway bending in a long-stroke shaker. , 2019, Optics express.

[17]  Naveen Garg,et al.  Low frequency Accelerometer Calibration using an optical encoder sensor , 2017 .

[18]  T. Bruns,et al.  Correction of shaker flatness deviations in very low frequency primary accelerometer calibration , 2016 .

[19]  Naveen Garg,et al.  Establishing a Traceability Chain for Sound Pressure and Vibration Amplitude Measurements , 2015 .

[20]  N. Garg,et al.  Monte Carlo Simulation in Uncertainty Evaluation: Strategy, Implications and Future Prospects , 2019, MAPAN.

[21]  G. D'Emilia,et al.  Amplitude–phase calibration of tri-axial accelerometers in the low-frequency range by a LDV , 2019, Journal of Sensors and Sensor Systems.

[22]  Ying Wang,et al.  Monocular Vision-Based Calibration Method for Determining Frequency Characteristics of Low-Frequency Vibration Sensors , 2021, IEEE Sensors Journal.

[23]  Naveen Garg,et al.  Applications of Laser Interferometry in Providing Traceable Vibration Measurements in India , 2015 .

[24]  Naveen Garg,et al.  A novel approach for realization of primary vibration calibration standard by homodyne laser interferometer in frequency range of 0.1 Hz to 20 kHz , 2012 .

[25]  Thomas Bruns,et al.  The influence of source impedance on charge amplifiers , 2014 .