Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for acquiring radial direction water velocity in acoustic Doppler current profiler

A technology of acoustic Doppler and water flow velocity, applied in fluid velocity measurement, velocity/acceleration/shock measurement, instruments, etc. Distance, simple steps and accurate measurement results

Active Publication Date: 2014-03-12
NANJING SHIHAI ACOUSTIC TECH CO LTD
View PDF3 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when using conventional methods to detect broadband signals, usually only the center frequency or several frequency points are processed, which does not reflect the Doppler frequency shift law of the entire broadband spectrum. Speed ​​measurement accuracy

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for acquiring radial direction water velocity in acoustic Doppler current profiler
  • Method for acquiring radial direction water velocity in acoustic Doppler current profiler
  • Method for acquiring radial direction water velocity in acoustic Doppler current profiler

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] The principle and implementation process of the present invention will be further elucidated below in conjunction with specific embodiments. It should be understood that this embodiment is only used to illustrate the present invention and not to limit the scope of the present invention.

[0017] Such as figure 1 As shown, it means that the matching signal is generated by increasing the sampling frequency, so as to realize the complete matching between the matching signal and the echo signal with reduced frequency, that is, the matched filtering result reaches the maximum value. figure 1 (a) is the waveform of the transmitted signal s(n), which produces scattered echoes through the scatterers in the water body and is received by the acoustic wave transducer. In the case of positive radial velocity v, the Doppler shift is negative (where f 0 represents the frequency of the transmitted signal), so the frequency of the echo signal decreases and the waveform changes, suc...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a method for acquiring radial direction water velocity in an acoustic Doppler current profiler. The acoustic Doppler current profiler adopts an acoustic wave transducer as a sensor, an emitted acoustic impulse generates a scatter echo through an irregular scatterer in a water body, the acoustic wave transducer receives the scatter echo, and the radial direction water velocity is acquired through analysis. The method is characterized by comprising the following steps: firstly, setting a search scope and a count of radial direction water velocity according to the direction and degree of urgency of water flow in measurement environment; and secondly, designing a matching signal corresponding to radial direction velocity of each search point, carrying out matched filtering operation on the matching signal corresponding to each radial direction velocity and an echo signal received by the acoustic wave transducer, and searching a matched filtering result, wherein the radial direction velocity corresponding to a maximum value of the matched filtering result is the radial direction velocity to be measured.

Description

technical field [0001] The invention relates to a method for acquiring radial water flow velocity in an acoustic Doppler velocity profiler (ADCP), and belongs to the technical field of underwater acoustic signal measurement. Background technique [0002] Different from propeller and electromagnetic current meters, the acoustic Doppler current profiler (Acoustic Doppler Current Profiler, ADCP) uses an acoustic transducer as a sensor, and the sound pulse emitted by it passes through the unevenly distributed sediment particles in the water body. , Plankton and other scatterers produce scattered echoes, which are received by the acoustic wave transducer and estimated by Doppler frequency shift to calculate the radial flow velocity, that is, the part of the water flow velocity parallel to the acoustic wave beam emitted by the acoustic wave transducer, and then according to The angle between the sound beam and the direction of the water flow calculates the water velocity. ADCP ca...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G01P5/24
Inventor 方世良韩宁
Owner NANJING SHIHAI ACOUSTIC TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com