Title:
SIGNAL PROCESSING METHOD AND SIGNAL PROCESSING DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/135627
Kind Code:
A1
Abstract:
The purpose of the present disclosure is to reduce the amount of calculation and to perform real-time processing while streaming measurement data. In order to accomplish the aforementioned purpose, a signal processing method according to the present disclosure comprises: a calculation step for calculating, at each of predetermined clock times, a phase change at each of points on a medium from the phase of a reflective signal resulting from a pulse signal transmitted to the medium; a phase connection step for performing, at each of the predetermined clock times, phase connection processing for the phase change at each of the points calculated in the calculation step; and a correction step for, at each of the predetermined clock times, detecting an outlier using the phase change at each of the points at the same clock time when the phase connection processing is performed in the phase connection step, and correcting the outlier.
Inventors:
WAKISAKA YOSHIFUMI (JP)
TAKAHASHI HIROSHI (JP)
IIDA DAISUKE (JP)
KOSHIKIYA YUSUKE (JP)
TAKAHASHI HIROSHI (JP)
IIDA DAISUKE (JP)
KOSHIKIYA YUSUKE (JP)
Application Number:
PCT/JP2022/000476
Publication Date:
July 20, 2023
Filing Date:
January 11, 2022
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
G01J9/00; G01H9/00; G01M11/00
Domestic Patent References:
| WO2013051196A1 | 2013-04-11 |
Foreign References:
| JP2017026503A | 2017-02-02 | |||
| JP2021156822A | 2021-10-07 | |||
| JP2020162168A | 2020-10-01 |
Other References:
WAKISAKA, YOSHIFUMI ET AL.: "B-13-1 Frequency-division-multiplex technique enabling both sampling rate enhancement and fading noise reduction in phase-OTDR vibration sensing", PROCEEDINGS OF THE 2021 IEICE GENERAL CONFERENCE; ONRAIN, JAPAN; MARCH 9-12, 2021, vol. 2021, 23 February 2021 (2021-02-23) - 12 March 2021 (2021-03-12), pages 244, XP009547635
WAKISAKA, YOSHIFUMI ET AL.: "Noise reduction using Hilbert transform in coherent phase OTDR with IQ receiver", PROCEEDINGS OF THE 2019 IEICE GENERAL CONFERENCE; TOKYO, JAPAN; MARCH 19-22, 2019, vol. 2019, 5 March 2019 (2019-03-05) - 22 March 2019 (2019-03-22), pages 308, XP009547634
DAISUKE IIDA, KUNIHIRO TOGE, TETSUYA MANABE: "B-13-8 Consideration on Frequency Dependence in Vibration Distribution Measurement by Frequency Multiphase OTDR", LECTURE PROCEEDINGS 2 OF THE 2018 COMMUNICATION SOCIETY CONFERENCE OF IEICE, IEICE COMMUNICATIONS SOCIETY, JP, 6 September 2016 (2016-09-06) - 23 September 2016 (2016-09-23), JP , pages 311, XP009547633, ISSN: 1349-144X
WAKISAKA, YOSHIFUMI ET AL.: "Noise reduction using Hilbert transform in coherent phase OTDR with IQ receiver", PROCEEDINGS OF THE 2019 IEICE GENERAL CONFERENCE; TOKYO, JAPAN; MARCH 19-22, 2019, vol. 2019, 5 March 2019 (2019-03-05) - 22 March 2019 (2019-03-22), pages 308, XP009547634
DAISUKE IIDA, KUNIHIRO TOGE, TETSUYA MANABE: "B-13-8 Consideration on Frequency Dependence in Vibration Distribution Measurement by Frequency Multiphase OTDR", LECTURE PROCEEDINGS 2 OF THE 2018 COMMUNICATION SOCIETY CONFERENCE OF IEICE, IEICE COMMUNICATIONS SOCIETY, JP, 6 September 2016 (2016-09-06) - 23 September 2016 (2016-09-23), JP , pages 311, XP009547633, ISSN: 1349-144X
Attorney, Agent or Firm:
OKADA, Kenji et al. (JP)
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