Title:
SIGNAL PROCESSING METHOD AND SIGNAL PROCESSING DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/201330
Kind Code:
A1
Abstract:
A signal processing device (19) executes: a phase connection processing step for carrying out phase connection processing with respect to the phase value at each position in a space and each of a plurality of time points; a first correction step for carrying out, for a specified time point among the plurality of time points, phase value outlier correction at each position in the space along a specified direction of the space, on the basis of the results of the phase connection processing; and a second correction step for carrying out, for each of the positions among the positions in the space that were targets of correction by the first correction step, phase value correction for a time point other than the specified time point.
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Inventors:
WAKISAKA YOSHIFUMI (JP)
OKAMOTO TATSUYA (JP)
IIDA DAISUKE (JP)
KOSHIKIYA YUSUKE (JP)
KIKUCHI MASASHI (JP)
HONDA NAZUKI (JP)
OKAMOTO TATSUYA (JP)
IIDA DAISUKE (JP)
KOSHIKIYA YUSUKE (JP)
KIKUCHI MASASHI (JP)
HONDA NAZUKI (JP)
Application Number:
PCT/JP2021/012078
Publication Date:
September 29, 2022
Filing Date:
March 23, 2021
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
G01D5/353
Foreign References:
| JP2017026503A | 2017-02-02 | |||
| JP2019035682A | 2019-03-07 | |||
| JP2020085793A | 2020-06-04 | |||
| JP2015500483A | 2015-01-05 | |||
| US20200259563A1 | 2020-08-13 | |||
| JP2020169904A | 2020-10-15 |
Other References:
A. MASOUDIT. P. NEWSON: "Contributed Review: Distributed optical fibre dynamic strain sensing", REVIEW OF SCIENTIFIC INSTRUMENTS, vol. 87, 2016
KENICHI NISHIGUCHILI CHE-HSIENARTUR GUZIKMITSUNORI YOKOYAMAKINZO MASUDA: "Fabrication of Fiber-Optic Distributed Acoustic Sensor and Its Signal Processing", IEICE TECHNICAL REPORT, vol. 115, no. 202, 2015, pages 29 - 34
Y. WAKISAKAD. IIDAH, OSHIDA: "Distortion-suppressed sampling rate enhancement in phase-OTDR vibration sensing with newly designed FDM pulse sequence for correctly monitoring various waveforms", OFC2020, OSA TECHNICAL DIGEST, 2020
KENICHI NISHIGUCHILI CHE-HSIENARTUR GUZIKMITSUNORI YOKOYAMAKINZO MASUDA: "Fabrication of Fiber-Optic Distributed Acoustic Sensor and Its Signal Processing", IEICE TECHNICAL REPORT, vol. 115, no. 202, 2015, pages 29 - 34
Y. WAKISAKAD. IIDAH, OSHIDA: "Distortion-suppressed sampling rate enhancement in phase-OTDR vibration sensing with newly designed FDM pulse sequence for correctly monitoring various waveforms", OFC2020, OSA TECHNICAL DIGEST, 2020
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (JP)
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