Real-time processing system of modularized array acoustic signals

Abstract

The invention discloses a real-time processing system of modularized array acoustic signals, and belongs to the technical field of ocean acoustic signal collection. The system comprises a mounting base, and data collection modules, a signal processing module, a storage module, a clock module, a control module and a power supply module mounted on the mounting base; the data collection modules receive analog electric signals output by an acoustic sensor, and process the analog electric signals; the signal processing module makes data interaction with the data collection module, and carries out time-frequency conversion, weak signal detection and target signal identification on data; the control module is used for synchronous management of the data collection modules and communication among the modules; the power supply module supplies power for the modules; and the data collection module, the signal processing module, the storage module, the clock module, the control module and the powersupply module are integrated on PCBs respectively, and each PCB is provided with the same data input and output ports. Thus, the signal to noise ratio as well as the collection consistency of an underwater acoustic signal collection array circuit can be improved.

Description

technical field [0001] The invention belongs to the technical field of ocean acoustic signal acquisition, in particular to a real-time processing system for modular array acoustic signals. Background technique [0002] With the continuous expansion of the field of underwater acoustic signal detection, people increasingly feel that a single acoustic sensor has more limitations in terms of signal gain, resolution, and identification of incoming wave direction. Therefore, more and more attention has been paid to the application of sensor arrays in practical applications. A sensor array refers to a sensor array in which multiple sensors are placed in different spatial positions in a certain way to form a fixed formation. Receiving spatial signals in the form of an array is equivalent to performing time-domain discrete sampling on spatially distributed sound field signals, and performing beamforming and other processing on the collected signals, which can realize directivity con...

AI Technical Summary

Problems solved by technology

[0003] Most of the existing underwater acoustic signal acquisition arrays are a fixed number of sensor array elements. The acquisition circuit adopts a centralized structure and has a large and complex acquisition and conditioning circuit, including signal filtering, amplification, etc., and these processes will introduce additional signal distortion and chain road noise, and the amplitude and phase consistency of each channel signal is difficult to control

In addition, the existing underwater acoustic signal arrays are more limited in flexibility, and it becomes very difficult to add new instrument functions to the array or to complete a custom measurement plan (increase or decrease the number of array elements)

When the system needs to be expanded and upgraded, it may be necessary to re-purchase and design the system, and the original system will be idle, which not only wastes resources, increases the cost of the upgrade, but also brings great inconvenience to the system design

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