Title:
TRAJECTORY ESTIMATION DEVICE, TRAJECTORY ESTIMATION SYSTEM, TRAJECTORY ESTIMATION METHOD, AND PROGRAM RECORDING MEDIUM
Document Type and Number:
WIPO Patent Application WO/2021/181517
Kind Code:
A1
Abstract:
In order to estimate the trajectory of a moving wave source, this trajectory estimation device (10) comprises: an acquisition unit (11) that acquires wave motion data based on wave motion detected by a plurality of sensors (100); a generation unit (12) that generates a spectrogram using the wave motion data; an extraction unit (13) that extracts a Doppler shift from the spectrogram; a selection unit (14) that selects, as a sensor pair, two sensors that satisfy a preset selection condition pertaining to the Doppler shift; and an estimation unit (15) that estimates the trajectory of a wave source, which is the source generating the wave motion, on the basis of the positional relationship between the sensors constituting the sensor pair and the relationship of the Doppler shift between the two sensors constituting the sensor pair.
Inventors:
ARAI YUMI (JP)
KONDO REISHI (JP)
KONDO REISHI (JP)
Application Number:
PCT/JP2020/010269
Publication Date:
September 16, 2021
Filing Date:
March 10, 2020
Export Citation:
Assignee:
NEC CORP (JP)
International Classes:
G01S5/18; G01S3/802
Foreign References:
| JP2000205794A | 2000-07-28 | |||
| JP2015118004A | 2015-06-25 | |||
| JP2007033445A | 2007-02-08 | |||
| JPH0587903A | 1993-04-09 | |||
| US20110110195A1 | 2011-05-12 |
Attorney, Agent or Firm:
SHIMOSAKA Naoki (JP)
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