Original article can be found at: http://www.sciencedirect.com/science/journal/02632241 Copyright Elsevier Ltd. DOI: 10.1016/j.measurement.2008.12.002Researchers have been looking for alternatives of expensive conventional accelerometers in vibration measurements. Micro-ElectroMechanical Systems (MEMS) accelerometer is one of the available options. Here the performance of one of these MEMS accelerometers compared with a well known commercial accelerometer
Micro-electro-mechanical system (MEMS) accelerometers have been receiving attention because of their low cost and small size. Accurate vibration measurements of both amplitude and phase at all frequencies in the measurement frequency range are important for the reliable vibration analysis. However, it has been observed that such accelerometers show some deviation. Hence, a simple calibration method in frequency domain has been used for correcting both amplitude and phase for the measured signals by the MEMS accelerometers. The paper presents the calibration procedure and results of this study applied on two MEMS accelerometers with different technical specifications.
A simple method is proposed here to enhance the frequency range of measurement for an accelerometer based on laboratory experiments. The proposed method generates a Characteristic Function (CF) in frequency domain for the test accelerometer by comparing with other high frequency accelerometers such that the CF can be used to correct the amplitude and phase measurement beyond the linearity frequency range for the test accelerometer.
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