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Technique for suppressing the electronic offset drift of interferometric open-loop fiber optic gyroscopes

机译：抑制干涉式开环光纤陀螺仪的电子偏移漂移的技术

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摘要

A technique to eliminate the offset drift in the demodulator circuitry of open-loop interferometric fiber optic gyroscopes is presented. This technique employs a demodulation scheme that uses the area of the negative half- cycles of the output signal of a sinusoidally modulated gyroscope to obtain the angular velocity. We propose an electronic circuitry that periodically reverses the demodulator input, allowing for the acquisition of two samples of the gyroscope signal with the same magnitude and opposite polarities. The angular velocity is obtained from the subtraction of these two samples, suppressing the electronic offset. Experiments showed that the proposed method reduces the demodulator offset drift from 4.4 mu V/degrees C to about 14 nV/degrees C, which is equivalent to a reduction, from 0.2 deg/h/degrees C to about 0.0006 deg/h/degrees C in the tested gyroscope. The proposed technique improved the bias stability of the tested gyroscope from 0.0162 to 0.0071 deg/h. (C) 2016 Optical Society of America
机译：提出了一种消除开环干涉光纤陀螺仪的解调器电路中的偏移漂移的技术。该技术采用解调方案，该方案使用正弦调制陀螺仪的输出信号的输出信号的负半周期区域以获得角速度。我们提出了一种电子电路，其周期性地反转解调器输入，允许采集具有相同幅度和极性的陀螺仪信号的两个样本。从这两个样品的减法获得角速度，抑制电子偏移。实验表明，所提出的方法将解调器偏移漂移从4.4μV/℃至约14nV /℃降低，这相当于0.2°/ h /℃至约0.0006°/ h / degerc的减少在测试的陀螺仪中。所提出的技术改善了测试陀螺仪的偏置稳定性从0.0162-0.0071°/ h。 （c）2016年光学学会

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  • 来源
    《Optics Letters》 |2016年第22期|共4页
  • 作者

    Bacurau Rodrigo M.; Spengler Anderson W.; Dante Alex; Morais Flavio J. O.; Duarte Luis F. C.; Ribeiro Luiz E. B.; Ferreira Elnatan C.;

  • 作者单位

    Univ Estadual Campinas Dept Semicond Instruments &

    Photon Sch Elect &

    Comp Engn BR-13083852 Campinas SP Brazil;

    Univ Fed Santa Catarina Software Hardware Integrat Lab BR-89211675 Joinville Brazil;

    Univ Estadual Campinas Dept Semicond Instruments &

    Photon Sch Elect &

    Comp Engn BR-13083852 Campinas SP Brazil;

    Univ Estadual Campinas Dept Semicond Instruments &

    Photon Sch Elect &

    Comp Engn BR-13083852 Campinas SP Brazil;

    Univ Tecnol Fed Parana Dept Elect Engn BR-86300000 Cornelio Procopio Brazil;

    Univ Estadual Campinas Dept Semicond Instruments &

    Photon Sch Elect &

    Comp Engn BR-13083852 Campinas SP Brazil;

    Univ Estadual Campinas Dept Semicond Instruments &

    Photon Sch Elect &

    Comp Engn BR-13083852 Campinas SP Brazil;

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  • 正文语种 eng
  • 中图分类 计量学;光学;
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