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Method for quickly simplifying and automatically optimizing sound velocity profile based on maximum offset of sound velocity

A sound velocity profile and maximum offset technology, applied in surveying and navigation, measuring devices, instruments, etc., can solve the problems of large data volume and affecting the efficiency of multi-beam bathymetry

Active Publication Date: 2014-02-19
SECOND INST OF OCEANOGRAPHY MNR
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005] The invention discloses a method for rapid simplification and automatic optimization of sound velocity profiles based on the maximum deviation of sound velocity, in order to solve the problem that the working efficiency of multi-beam sounding is seriously affected due to the large amount of original measured sound velocity profile data

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  • Method for quickly simplifying and automatically optimizing sound velocity profile based on maximum offset of sound velocity
  • Method for quickly simplifying and automatically optimizing sound velocity profile based on maximum offset of sound velocity
  • Method for quickly simplifying and automatically optimizing sound velocity profile based on maximum offset of sound velocity

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Embodiment 1

[0082] The method of rapid simplification and automatic optimization of the sound velocity profile based on the maximum deviation of the sound velocity includes the following steps:

[0083] See the complete technical flow chart of the present invention figure 1 ;

[0084] Step 1: Form the original sound velocity profile data set

[0085] 1.1) If there is a sound velocity profile, directly form the sound velocity profile data set SVP in ={in_svp i } i=1,n , I is the serial number of the sound velocity profile, n is the number of sound velocity profiles collected, i and n are natural numbers;

[0086] 1.2) If there is no sound velocity profile, the sound velocity profile acquisition instrument can be used to obtain the original sound velocity profile in the ocean and form the original sound velocity profile data set SVP in ={in_svp i } i=1,n ;

[0087] 1.3) Each sound velocity profile in_svp i ={P j =(d j ,v j )} j=1,m , Where P j Is the sound velocity profile point, d j And v j For ...

Embodiment 2

[0145] In order to evaluate the impact of the simplified sound velocity profile on the multi-beam survey and data processing of the "quick simplification and automatic optimization method of the sound velocity profile based on the maximum deviation of the sound velocity", the technical process in Example 1 is used to simplify and evaluate the sound velocity profile measured. , And use the measured multi-beam water depth data for processing to evaluate the impact of sound velocity profiles under different thresholds on the efficiency of multi-beam processing. The specific process is:

[0146] (1) Form the original sound velocity profile data set: the measured original sound velocity profile point data set used in the example is used for method verification. The acquisition instrument is the XR-420 temperature and salt depth gauge, with 11 measured sound velocity profiles in total; the 11 sound velocity profile data obtained are analyzed and classified, which can be divided into 3 t...

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Abstract

The invention discloses a method for quickly simplifying and automatically optimizing sound velocity profile based on maximum offset of sound velocity (MOV), and provides detailed comprehensive technical process so as to solve the problem that the work efficiency of multi-beam detection and data processing is seriously influenced because the original sound velocity profile has large data quantity. An MOV method is provided and is used for deleting the redundant points of automatically and quickly and evaluating the influence of the simplified sound velocity profile on precision of multi-beam depth sounding through ray tracing and error analysis. According to actual tests, the simplification rate of the processed sound velocity profile reaches 90%, and the multi-beam footprint calculation requirement can be met by evaluating the precision of the sound velocity profile. By the method, multi-beam surveying and data processing time can be greatly reduced, and multi-beam work efficiency can be effectively improved by more than three times. The method has an important actual application value in the aspects of hydrographic surveying and charting, multi-beam surveying, a marine geographic information system, computer graphics, submarine science research and the like, and can be popularized and used.

Description

Technical field [0001] The invention relates to the technical fields of seabed topography and landform mapping, marine surveying and mapping, marine geographic information system, computer graphics and seabed science. Background technique [0002] Sound Velocity Profile (SVP) is the basic parameter necessary to realize accurate multi-beam survey. The sound velocity profile is generally determined by the direct method (instrumental measurement) and indirect method (empirical model of sound velocity). At present, the sampling rate of sound velocity profile measurement equipment can generally reach 20 Hz. If the descent speed of the instrument is calculated at 1 m / s, the number of sound velocity profile data points collected at a depth of 100 m will reach 2000 groups. For multi-beam surveys in deep water, the amount of SVP data will be huge. The high sampling density of sound velocity profile data greatly increases the calculation time of ray tracing and beam footprint reduction, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C13/00
CPCG01C13/00G01V1/303G01V2210/6222
Inventor 吴自银赵荻能周洁琼李守军尚继宏
Owner SECOND INST OF OCEANOGRAPHY MNR
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