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    Compact optical MEMS accelerometers and temperature sensors

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    Timotijevic, B.; Petremand, Y.; Bayat, D.; Luetzelschwab, M.; Aebi, L.; Tormen, M.
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    Abstract
    Continuous and accurate monitoring of acceleration and temperature inside large turbo- and hydro-generators is of crucial importance to prevent extremely expensive system damages and false positives. Development of optical, metal-free sensors for such systems has gained a lot of attention due to the fact that they are resistant to typically very strong electromagnetic fields and that they are non-conductive. We present miniature temperature and accelerometer optical sensors using a common silicon MEMS platform. A linear response with a deviation as small as 1% between set and measured accelerations has been obtained in an acceleration range 0-40g. Preliminary tests for temperature sensors indicate a linear response with sensitivity better than 1 degrees C in a range of 20 degrees C to 150 degrees C.
    Publication Reference
    in Moems and Miniaturized Systems Xvi. vol. 10116 (Issue), W. Piyawattanametha and Y. H. Park, Eds., ed Bellingham: Spie-Int Soc Optical Engineering, 2017.
    Year
    2017
    URI
    https://yoda.csem.ch/handle/20.500.12839/111
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