A Down Sampling Technique for Open-Loop Fiber Optic Gyroscopes ans Its Implementation with a Single-Chip Digital Signal Processor

Shigeru OHO; Masatoshi HOSHINO; Hisao SONOBE; Hiroshi KAJIOKA

A Down Sampling Technique for Open-Loop Fiber Optic Gyroscopes ans Its Implementation with a Single-Chip Digital Signal Processor

Shigeru OHO, Masatoshi HOSHINO, Hisao SONOBE, Hiroshi KAJIOKA

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A down sampling technique was applied to signal processing of fiber optic gyroscopes with optical phase modulation. The technique shifts the frequency spectrum of the gyroscopic signal down to low frequencies, and lowers the speed requirements for analog-to-digital (A/D) conversion and numerical operations. A single-chip digital signal processor (DSP) with a built-in A/D converter and timers was used to demonstrate the proposed technique. The DSP internally generated a phase modulation signal and sampling trigger timing. The reference signals for digital lock-in discrimination of gyroscopic spectrum are generated by using an external binary counter, and their phases were adjusted optimally by DSP software. The DSP compensated for fluctuations in laser source intensity and phase modulation index, using the signal spectrum extracted, and linearized the gyroscopic response. The measured resolution of rotation detection was 0.9 deg/s (with a full scale of 100 deg/s) and it agreed with the resolution in A/D conversion.

Publication: IEICE TRANSACTIONS on Fundamentals Vol.E78-A No.8 pp.971-977

Publication Date: 1995/08/25

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Type of Manuscript: Special Section PAPER (Special Section on Digital Signal Processing)

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Shigeru OHO, Masatoshi HOSHINO, Hisao SONOBE, Hiroshi KAJIOKA, "A Down Sampling Technique for Open-Loop Fiber Optic Gyroscopes ans Its Implementation with a Single-Chip Digital Signal Processor" in IEICE TRANSACTIONS on Fundamentals, vol. E78-A, no. 8, pp. 971-977, August 1995, doi: .
Abstract: A down sampling technique was applied to signal processing of fiber optic gyroscopes with optical phase modulation. The technique shifts the frequency spectrum of the gyroscopic signal down to low frequencies, and lowers the speed requirements for analog-to-digital (A/D) conversion and numerical operations. A single-chip digital signal processor (DSP) with a built-in A/D converter and timers was used to demonstrate the proposed technique. The DSP internally generated a phase modulation signal and sampling trigger timing. The reference signals for digital lock-in discrimination of gyroscopic spectrum are generated by using an external binary counter, and their phases were adjusted optimally by DSP software. The DSP compensated for fluctuations in laser source intensity and phase modulation index, using the signal spectrum extracted, and linearized the gyroscopic response. The measured resolution of rotation detection was 0.9 deg/s (with a full scale of 100 deg/s) and it agreed with the resolution in A/D conversion.
URL: https://global.ieice.org/en_transactions/fundamentals/10.1587/e78-a_8_971/_p

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@ARTICLE{e78-a_8_971,
author={Shigeru OHO, Masatoshi HOSHINO, Hisao SONOBE, Hiroshi KAJIOKA, },
journal={IEICE TRANSACTIONS on Fundamentals},
title={A Down Sampling Technique for Open-Loop Fiber Optic Gyroscopes ans Its Implementation with a Single-Chip Digital Signal Processor},
year={1995},
volume={E78-A},
number={8},
pages={971-977},
abstract={A down sampling technique was applied to signal processing of fiber optic gyroscopes with optical phase modulation. The technique shifts the frequency spectrum of the gyroscopic signal down to low frequencies, and lowers the speed requirements for analog-to-digital (A/D) conversion and numerical operations. A single-chip digital signal processor (DSP) with a built-in A/D converter and timers was used to demonstrate the proposed technique. The DSP internally generated a phase modulation signal and sampling trigger timing. The reference signals for digital lock-in discrimination of gyroscopic spectrum are generated by using an external binary counter, and their phases were adjusted optimally by DSP software. The DSP compensated for fluctuations in laser source intensity and phase modulation index, using the signal spectrum extracted, and linearized the gyroscopic response. The measured resolution of rotation detection was 0.9 deg/s (with a full scale of 100 deg/s) and it agreed with the resolution in A/D conversion.},
keywords={},
doi={},
ISSN={},
month={August},}

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TY - JOUR
TI - A Down Sampling Technique for Open-Loop Fiber Optic Gyroscopes ans Its Implementation with a Single-Chip Digital Signal Processor
T2 - IEICE TRANSACTIONS on Fundamentals
SP - 971
EP - 977
AU - Shigeru OHO
AU - Masatoshi HOSHINO
AU - Hisao SONOBE
AU - Hiroshi KAJIOKA
PY - 1995
DO -
JO - IEICE TRANSACTIONS on Fundamentals
SN -
VL - E78-A
IS - 8
JA - IEICE TRANSACTIONS on Fundamentals
Y1 - August 1995
AB - A down sampling technique was applied to signal processing of fiber optic gyroscopes with optical phase modulation. The technique shifts the frequency spectrum of the gyroscopic signal down to low frequencies, and lowers the speed requirements for analog-to-digital (A/D) conversion and numerical operations. A single-chip digital signal processor (DSP) with a built-in A/D converter and timers was used to demonstrate the proposed technique. The DSP internally generated a phase modulation signal and sampling trigger timing. The reference signals for digital lock-in discrimination of gyroscopic spectrum are generated by using an external binary counter, and their phases were adjusted optimally by DSP software. The DSP compensated for fluctuations in laser source intensity and phase modulation index, using the signal spectrum extracted, and linearized the gyroscopic response. The measured resolution of rotation detection was 0.9 deg/s (with a full scale of 100 deg/s) and it agreed with the resolution in A/D conversion.
ER -