Title:
水中異常検知システム及び水中異常検知装置
Document Type and Number:
Japanese Patent JP7218615
Kind Code:
B2
Abstract:
To make it possible to precisely detect anomaly regardless of a change in a state of a wave.SOLUTION: An underwater anomaly detection system 1 sets a target range of a beacon reception signal to proximity target range or a distal target range on the basis of the magnitude of a wave around an acoustic sensor device 3, and moves the acoustic sensor device 3 on the basis of a signal level of the beacon received from a beacon device 2 installed near the center of a fishing ground F. By virtue of this, even though the magnitude of noise included in sound collected by the acoustic sensor 25 may change according to the magnitude of a wave, and the dimensions of a detection region D may also be changed, the acoustic sensor device 3 can move so as to include at least part of the outer periphery of the fishing ground F in this detection region D. Therefore, the underground anomaly detection system 1 can detect anomaly by collecting detection target noise before a poaching boat, a poacher, etc. approaching the fishing ground F from outside enter this fishing ground F.SELECTED DRAWING: Figure 8
Inventors:
Kei Kato
Application Number:
JP2019036167A
Publication Date:
February 07, 2023
Filing Date:
February 28, 2019
Export Citation:
Assignee:
Oki Electric Industry Co., Ltd.
International Classes:
G01V9/00; B63G8/39; H04B11/00
Domestic Patent References:
| JP2005269378A | ||||
| JP2002181618A | ||||
| JP2002183844A | ||||
| JP6043583U | ||||
| JP2007171146A | ||||
| JP2003004848A |
Attorney, Agent or Firm:
Okuda Koichi