A Multi-Position Calibration Method for Consumer-Grade Accelerometers, Gyroscopes, and Magnetometers to Field Conditions

Olli Särkkä, Tuukka Nieminen, Saku Suuriniemi, Lauri Kettunen

    Tutkimustuotos: ArtikkeliScientificvertaisarvioitu

    84 Sitaatiot (Scopus)
    1082 Lataukset (Pure)

    Abstrakti

    This paper presents a calibration method for consumer-grade accelerometers, gyroscopes, and magnetometers. Considering the calibration of consumer-grade sensors, it is essential that no specialized equipment is required to create reference signals. In addition, the less is required from the reference signals, the more suitable the method is on the field. In the proposed method, the novelty in the calibration of the gyroscopes lies in the exploitation of only the known net rotations between the positions in a multi-position calibration. For accelerometers and magnetometers, the innovation is that the direction of reference signals, the gravity and the magnetic field of the Earth, are estimated with calibration parameters. As a consequence, no precise absolute alignment of the sensors is needed in the calibration. The rotations need not be done about a constant axis. In the proposed method, the biases, scale factors, misalignments, and cross-coupling errors for all the sensors as well as hard iron and soft iron effect for magnetometers were modelled. In addition, the drift of the sensors during the calibration was estimated. As a result, all the sensors were calibrated at once to the same frame, exploiting only a cube and a jig and thus, the method is eligible in the field. To estimate the quality of the calibration results, 95% confidence intervals were calculated for the calibration parameters. Simulations were done to indicate that the calibration method is unbiased.

    AlkuperäiskieliEnglanti
    Sivut3470-3481
    Sivumäärä12
    JulkaisuIEEE Sensors Journal
    Vuosikerta17
    Numero11
    DOI - pysyväislinkit
    TilaJulkaistu - 1 kesäk. 2017
    OKM-julkaisutyyppiA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä

    Julkaisufoorumi-taso

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