Side-scan sonar signal processing method based on ZYNQ

A signal processing and side-scan sonar technology, applied in the signal processing of side-scan sonar, based on ZYNQ in the field of side-scan sonar signal processing, can solve problems such as low efficiency, slow processing speed, shorten calculation time, etc., and achieve calculation high speed effect

Active Publication Date: 2019-09-17
ZHEJIANG UNIV OF TECH
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Problems solved by technology

[0007] In order to overcome the shortcomings of slow processing speed and low efficiency of the existing side-scan sonar signal processing method, the present invention provides a side-scan sonar signal processing method based on ZYNQ, which can greatly improve the signal processing rate and efficiency , thereby reducing calculation time and improving performance

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  • Side-scan sonar signal processing method based on ZYNQ
  • Side-scan sonar signal processing method based on ZYNQ
  • Side-scan sonar signal processing method based on ZYNQ

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Embodiment Construction

[0039] In order to make the implementation method of the present invention clearer, the present invention will be further described with reference to the accompanying drawings.

[0040] Reference figure 1 , figure 2 , image 3 , Figure 4 with Figure 5 , A ZYNQ-based side scan sonar signal processing method, including the following steps:

[0041] 1) Build a transmission channel for AD original collected data

[0042] The transmission channel of AD original collected data includes two parts: the programmable logic unit PL and the processing system PS. The processing system PS needs to be transplanted to the Linux system to receive the original collected data of AD with a bandwidth of 230.4Mbps through a gigabit network port, and store the original data of the left and right channels into the corresponding DDR3 shared memory space. The programmable logic unit includes FIFO memory, custom DMA data reading module, 2-bit EMIO, AXI_HP0 channel, AXI_HP1 channel and AXI interconnect str...

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Abstract

The invention discloses a side-scan sonar signal processing method based on ZYNQ. The method comprises the following steps of 1) reading AD original acquisition data in a DDR3 shared memory outside a PS end at a PL end by utilizing a FIFO memory, a self-defined DMA reading data module, EMIO and a logic unit of an AXI-HP interface; 2) carrying out digital quadrature demodulation, low-pass filtering downsampling and matched filtering processing on the AD original acquisition data in the step 1) by utilizing an FIR IP core, a Block RAM IP core, a multiplier IP core and a CORDIC IP core; and 3) storing a processing result in the step 2) into the DDR3 shared memory outside the PS end at the PL end by utilizing the FIFO memory, the self-defined DMA reading data module, a PL-PS interrupt and the logic unit of the AXI-HP interface. According to the method, the speed and precision of the side-scanning sonar signal processing can be effectively improved.

Description

Technical field [0001] The invention belongs to the field of digital signal processing and underwater detection, and relates to a signal processing method of side scan sonar, in particular to a ZYNQ-based side scan sonar signal processing method. Background technique [0002] Side scan sonar is a kind of ocean detection equipment that uses the principle of echo sounding to detect seabed landforms and underwater objects, also known as side sonar or seabed landform instrument. The transducer array of the side scan sonar system is generally installed on both sides of the underwater towed body or the bottom of the ship. The two linear transducer arrays on the left and the right emit sound pulses obliquely into the water, illuminating a slice centered on the transducer. The narrow trapezoidal bottom of the sea is then processed to generate sonar images with different brightness and darkness by processing the backscattered echo intensity of the bottom. After the image is composed by t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S15/89G01S7/526
CPCG01S7/526G01S15/8902
Inventor 陈朋葛倍倍蔡烜伟赵智韩洋洋
Owner ZHEJIANG UNIV OF TECH
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