FPGA-based acoustic doppler current profiler signal processing method and system

An acoustic Doppler and signal processing technology, applied in fluid velocity measurement, instruments, velocity/acceleration/shock measurement, etc., can solve the problems of poor real-time performance, high power consumption, and high cost, and achieve the effect of satisfying real-time performance

Active Publication Date: 2016-05-11
ZHEJIANG UNIV OF TECH
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Problems solved by technology

[0005] In order to overcome the shortcomings of the existing ADCP signal processing system, such as complex structure, high power consumption, high cost, large volume, and poor real-time performa

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  • FPGA-based acoustic doppler current profiler signal processing method and system
  • FPGA-based acoustic doppler current profiler signal processing method and system

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Embodiment Construction

[0033] In order to make the technical implementation of the present invention more clear, the present invention will be further described below in combination with specific schematic diagrams.

[0034] refer to figure 1 with figure 2 , a FPGA-based acoustic Doppler velocity profiler signal processing method, the method may further comprise the steps:

[0035] Step 1, system initialization, the host computer sets parameters and gives a start signal, waits for the timer to be interrupted after the system starts, and enters the formal work process when the timing is up;

[0036] Step 2: FPGA gives a digital pulse signal of a certain length, and after the signal is transmitted, the DA is turned on to control the front-end gain, and the high-speed AD circuit collects 4 beam output signals, transmits the digital signal to the FPGA, and buffers the digital signal into the DDR2 memory;

[0037] Step 3, read beam digital signal data from DDR2 memory, do quadrature baseband modulatio...

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Abstract

The invention relates to an FPGA-based acoustic doppler current profiler signal processing method. The method comprises the steps: 1. performing system initialization; 2. emitting a pulse signal, acquiring a wave beam output signal after emitting the pulse signal, storing a digital signal in a DDR2 memory; 3. reading the digital signal data from the DDR2 memory, performing orthogonal base band modulation processing and duplex downsampling filtering processing on the digital signal data, and storing the result in the DDR2 memory; 4. reading the data after the duplex downsampling filtering processing from the DDR2 memory, and performing multiple correlation operation; 5. acquiring temperature, pressure and other signals by a low velocity AD circuit, and calculating the acoustic velocity in the current water body, and then reading the data after the multiple correlation operation to calculate the flow velocity and the echo energy; and 6. storing the result data in a TF card, and sending the data to a host computer to process and display. The invention also provides an FPGA-based acoustic doppler current profiler signal processing system. The FPGA-based acoustic doppler current profiler signal processing system has the advantages of being simple in structure, being low in power consumption, being low in cost, being small in volume, and being good in real-time.

Description

technical field [0001] The invention relates to a signal processing method and system for acoustic flow measurement, belonging to the fields of acoustic flow measurement and high-speed digital signal processing, and in particular to an FPGA-based acoustic Doppler flow velocity profiler signal processing method and system. Background technique [0002] With the development of economy and society and the emergence of new water problems, it is necessary to further innovate the theory and methods of hydrological resources to serve the safe, efficient and sustainable use of water resources. The measurement of water flow velocity is one of the most important items in hydrological tests. Rapid and accurate water flow velocity measurement has become a basic requirement for water resource protection, development and utilization, as well as flood control and drought relief. Traditional water flow measurement technology cannot meet the needs of modern hydrological monitoring, and autom...

Claims

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Application Information

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IPC IPC(8): G01P5/24
CPCG01P5/241
Inventor 陈朋金礼聪党源杰徐天宇朱威
Owner ZHEJIANG UNIV OF TECH
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