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

Bathymetric surveying method without tide observation based on quasigeoid refinement

A technology of geoid and measurement method, which is applied in the directions of measuring devices, surveying of open-air water sources, measuring the depth of open-air water sources, etc., can solve the problem of higher accuracy of water level, and achieve the goals of saving investment, wide application range, and improving accuracy and efficiency Effect

Inactive Publication Date: 2015-06-24
SOUTHEAST UNIV
View PDF4 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the long and narrow shape of the Yangtze River, it is difficult to effectively refine the quasi-geoid using traditional elevation fitting methods. Unlike marine surveys, which mostly use small and medium scale maps, inland waterways are mostly large-scale maps. more demanding

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
  • Bathymetric surveying method without tide observation based on quasigeoid refinement
  • Bathymetric surveying method without tide observation based on quasigeoid refinement
  • Bathymetric surveying method without tide observation based on quasigeoid refinement

Examples

Experimental program
Comparison scheme
Effect test

example

[0089] The following calculation example takes a water depth test as an example. The test location is on a typical river surface of the Yangtze River. The test instruments are Hi-Target V30 receiver (connected to JSCORS system) and HD-310 depth sounder. According to the non-tide bathymetry technology of the Changjiang section based on the refinement of the quasi-geoid proposed in this patent, the data is collected in the field, and then processed in-house.

[0090] The elevation of the mud surface relative to the reference ellipsoid is:

[0091] h 泥 =H 大地高 -L-H 吃水 -H 水深 (9)

[0092] The elevation of the mud surface relative to the theoretical depth datum is:

[0093] H=H 理 -H 泥 =H 理 -(H 大地高 -L-H 吃水 -H 水深 )

[0094] =(H 理 -H 大地高 )+L+H 吃水 +H 水深 (10)

[0095] If the theoretical depth datum in formula (10) is regarded as quasi-geoid, H 理 is the elevation difference between the quasi-geoid and the ellipsoid, that is, the elevation anomaly ζ, so f...

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 discloses a bathymetric surveying method without tide observation based on quasigeoid refinement. The method comprises the steps of firstly carrying out height fitting for WGS-84 geodetic height measured by a network RTK by virtue of a sectional secondary curve surface and a BP neural network model so as to convert the measured geodetic height to 85 normal height, subtracting the height from a GPS antenna to the water from the obtained 85 normal height to obtain the normal elevation of the water surface, and obtaining the water bottom 85 elevation data according to the water surface normal elevation and the water depth data measured by a bathymetric surveying energy transducer without observing the water level data of a tidal station. By adopting the method, the water depth surveying precision and efficiency can be obviously improved, and the manpower and the material resource can be saved.

Description

technical field [0001] The invention relates to a geoid-like refinement non-tide water depth measurement method in a narrow and long area, belonging to the technical field of non-tide water depth measurement. Background technique [0002] The water depth measurement on the sea surface is affected by waves and tides. The original water depth data needs to be rectified and corrected by the transducer draft, sound velocity, swell, water level, etc. to obtain the water depth on the map relative to a fixed base surface (theoretical depth reference noodle). Regardless of single-beam or multi-beam bathymetric methods, the final accuracy of bathymetry is affected by factors such as the dynamic draft of the transducer, measured water depth, swell, and tide level when using the traditional tide gauge measurement method. [0003] First of all, when the survey ship is moving, it is difficult to accurately separate and measure the dynamic draft of the transducer due to the influence of ...

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): G01C13/00
CPCG01C13/008Y02A90/30
Inventor 生仁军高成发李术元李昱时小飞
Owner SOUTHEAST UNIV
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