Optical fiber vector hydrophone demodulation system based on ZYNQ series FPGA

Abstract

The invention relates to an optical fiber vector hydrophone demodulation system based on a ZYNQ series FPGA, which belongs to the technical field of application of optical fiber vector hydrophones. The demodulation system comprises a ZYNQ FPGA, an optical fiber vector hydrophone signal acquisition module, a USB storage module, a network interface module and a DDR3 synchronous dynamic random accessmemory (SDRAM), an expansion interface and a FLASH, with the latter six being connected to the periphery of the ZYNQ FPGA. The ZYNQ FPGA integrates a processing system PS part of the ARM processor and a programmable logic PL part of the Xilinx, optical signal acquisition, PGC adjustment, parameter measurement and calibration, data storage and network sending are integrated on one FPGA, and the requirements of miniaturization and underwater autonomous working of the optical fiber vector hydrophone are met. The defects in the prior art can be overcome, and popularization and application space can be wide.

Description

technical field [0001] The invention belongs to the technical field of optical fiber vector hydrophone applications, and in particular relates to a ZYNQ series FPGA-based optical fiber vector hydrophone demodulation system. Background technique [0002] The vector hydrophone can pick up the sound pressure and vibration velocity information in the sound field at the same time. Compared with the traditional scalar sound pressure hydrophone, it can collect more information, which brings new vitality to the development of underwater acoustic signal processing and sonar technology. It has high practical value in low-frequency underwater acoustic detection in shallow sea and limited space. The optical fiber vector hydrophone converts the measured signal into an optical signal through the high-sensitivity optical fiber coherent detection technology, and transmits it to the signal processing system through the optical fiber to extract information. It has many excellent characteristi...

AI Technical Summary

Problems solved by technology

This has led to the disadvantages of complex structure and large volume of the dry-end machine of the optical fiber vector hydrophone, which greatly limits the application of the optical fiber vector hydrophone in underwater systems, especially on small carriers such as underwater UUV.

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