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
【課題】波の状態の変化に関わらず、異常を精度良く検知し得るようにする。【解決手段】水中異常検知システム1は、音響センサ装置3の周囲の波の大きさを基にビーコン受信信号の目標範囲を近傍目標範囲又は遠方目標範囲に設定し、漁場Fの中心付近に設置したビーコン装置2から受信するビーコンの信号レベルを基に、音響センサ装置3を移動させる。このため音響センサ装置3は、波の大きさ応じて音響センサ25が集音する音に含まれる雑音の大きさが変化し、検知範囲Dの大きさも変化するものの、漁場Fの外周における少なくとも一部をこの検知範囲Dに含めるように移動できる。これにより水中異常検知システム1は、該漁場Fの外方から近接してくる密漁船や密漁者等が該漁場F内に入る前に、検知対象音を集音して異常を検知できる。【選択図】図8
UNDERWATER ANOMALY DETECTION SYSTEM AND UNDERWATER ANOMALY DETECTION DEVICE
水中異常検知システム及び水中異常検知装置
2020-09-03
Patent
Elektronische Ressource
Japanisch
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