Title:
音響センサ
Document Type and Number:
Japanese Patent JP7363915
Kind Code:
B2
Abstract:
An acoustic sensor that uses an optical fiber and has a high directivity is provided. An acoustic sensor includes a sensing part and an interrogator. The sensing part has a sensing element composed of an optical fiber. The interrogator is connected to the sensing part, sends a pulse light P to the sensing part, and detects an acoustic wave sensed by the sensing part based on a reflected return light from the sensing part. The sensing element is composed of the optical fiber folded in such a way that it reciprocates a plurality of number of times along a directivity direction in which directional sensitivity is exhibited.
Inventors:
Takashi Yano
Eitaro Misumi
Jun Muramatsu
Eitaro Misumi
Jun Muramatsu
Application Number:
JP2021554156A
Publication Date:
October 18, 2023
Filing Date:
September 14, 2020
Export Citation:
Assignee:
NEC
International Classes:
H04R23/00
Domestic Patent References:
| JP2103422A | ||||
| JP2001041817A |
Foreign References:
| US20120280117 | ||||
| CN109186743A | ||||
| WO2005095909A1 | ||||
| US20160131520 |
Attorney, Agent or Firm:
Ken Ieiri