Efficient very low frequency primary calibration method for accelerometers
This article describes an extension to the usual primary calibration of accelerometers according to ISO 16063 which tackles the problem of extremely long measuring times for low frequency excitation. The method utilizes a superposition of sine-signals at discrete frequencies in order to determine th...
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| Format: | Article |
| Language: | English |
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Elsevier
2021-12-01
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| Series: | Measurement: Sensors |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2665917421001197 |
| Summary: | This article describes an extension to the usual primary calibration of accelerometers according to ISO 16063 which tackles the problem of extremely long measuring times for low frequency excitation. The method utilizes a superposition of sine-signals at discrete frequencies in order to determine the complex frequency response for several frequencies in a single run. The article describes the synthesis of the excitation signal taking care of the detection of potential harmonic distortion. It explains the process of data analysis extending the well-known sine-approximation to simultaneous multi-frequency fitting including a period-wise slicing of the data.Finally, some examples of real measurements are provided. |
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| ISSN: | 2665-9174 |