Multi-channel sonar buoy signal preprocessing system and method

Abstract

The invention discloses a multi-channel sonar buoy signal preprocessing system and method, and the system comprises a plurality of channels, and each channel comprises a hydrophone, a shielding cable,a pre-amplification circuit, a phase adjustment circuit, a high-pass filter circuit, a signal amplification circuit, an amplitude adjustment circuit, and a low-pass filter circuit. On the basis of designing the low-noise pre-amplification circuit, the integrated grounding shielding technology is adopted to effectively reduce the broadband noise interference of preprocessing. High-precision resistors and capacitors are used for adjusting the consistency of multiple channels, and the stability degree of the high consistency of the multiple channels is ensured through the reliability of the resistor-capacitor device. According to the invention, while low-noise preprocessing is realized, the stability problem of multichannel amplitude and phase consistency difference is solved, and the multichannel preprocessing performance of sonar is further improved; and meanwhile, the structure is simple, hardware implementation is easy, high practicability is achieved, and application and popularization are convenient.

Description

technical field [0001] The invention belongs to the technical field of signal processing, and in particular relates to a sonar signal preprocessing system. Background technique [0002] The pros and cons of long-distance detection performance of underwater targets by aviation sonobuoys, hanging sonar and other related products depend heavily on the low-noise amplification and filtering technology of weak sonar signals. The low-noise amplification and filtering technologies are summarized as prediction processing technology. When this type of product works on a stand-alone or multi-array basis, the frequency of transmitting and receiving signals is often known. With the development of array technology, the number of sonar receiving channels has increased sharply. In order to improve the detection distance and detection accuracy of the target, the low noise, amplitude consistency, and phase Consistency poses extremely demanding requirements. [0003] There are currently two...

AI Technical Summary

Problems solved by technology

While realizing low-noise preprocessing, the present invention solves the stability problem of multi-channel amplitude and phase consistency differences, thereby improving the multi-channel preprocessing performance of sonar; meanwhile, the structure is simple, easy to realize by hardware, and has strong practicability , easy to promote and use

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