Distributed underwater background noise synchronous acquisition method and system

Abstract

The invention provides a distributed underwater background noise synchronous acquisition method, which comprises the following steps of S1, acquiring underwater sound background noise data by adopting a hydrophone, and transmitting the underwater sound background noise data to a data acquisition module; s2, the data acquisition module pre-processes and encodes the received data and then sends the data to a data collection and processing module; s3, the data collecting and processing module decodes the received data and then sends the decoded data to a target feature calculation and judgment module; and S4, the target feature calculation and judgment module extracts acoustic feature information from the received data, matches the acoustic feature information with the features of various underwater objects in the feature library, and sends a reminding signal when the matching degree reaches a set threshold value. The method has the advantages that the requirement for position distribution of signal receiving sensors is lowered, the detection distance is long, the device is hidden, and silent targets can be detected.

Description

technical field [0001] The invention relates to an automatic monitoring method for ships or other underwater objects, in particular to a distributed underwater background noise synchronous acquisition method and system. Background technique [0002] Ocean technology is the primary productive force in the process of ocean development. Due to the complexity of the water medium and the uncertainty of the underwater environment, the underwater detection distance, accuracy, and reliability are greatly affected. achieve "transparency". At present, a variety of underwater detection technologies are developing in parallel: active or passive sonar detection technology; underwater laser detection technology and so on. The current underwater detection technology basically relies on the detection equipment to actively transmit the detection signal or the source generated by the detected object to achieve detection; there are relatively high requirements for the position distribution of...

Images