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

River non-contact side-scan flow velocity measurement fixed velocity measurement vertical line positioning correction method

A flow velocity measurement, non-contact technology, applied in the directions of fluid velocity measurement, velocity/acceleration/shock measurement, measuring device, etc. The effect of positioning error

Inactive Publication Date: 2021-02-26
BUREAU OF HYDROLOGY CHANGJIANG WATER RESOURCES COMMISSION
View PDF5 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to address the above-mentioned deficiencies in the prior art, to provide a non-contact side-sweep flow velocity measurement fixed velocity measurement vertical line positioning correction method, to solve the non-contact side-sweep velocity measurement method of relative positioning of the river bank, which cannot be achieved due to water level changes Accurately locate the problem of fixed speed measuring vertical line

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
  • River non-contact side-scan flow velocity measurement fixed velocity measurement vertical line positioning correction method
  • River non-contact side-scan flow velocity measurement fixed velocity measurement vertical line positioning correction method
  • River non-contact side-scan flow velocity measurement fixed velocity measurement vertical line positioning correction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The present invention selects the Xiantao Hydrological Station in the Hanjiang River Basin to carry out the test, and compares it with the flow test method of the current meter through the correction of the fixed velocity measuring vertical line, as follows: figure 2 and image 3 , the cross-sectional flow velocity distribution after correction is closer to the measurement data of the international standard current meter, with improved accuracy and reduced error.

[0045] After the installation of various current measuring and sweeping instruments is completed, the determination of calculation methods and parameters is mainly based on the latest manual flow measurement results, without considering the errors caused by water level changes during instrument measurement and manual comparison. Depend on figure 2 It can be seen that as the water level changes, the lateral distribution of the flow velocity will change greatly due to the difference in water depth between di...

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 provides a river non-contact side-scan flow velocity measurement fixed velocity measurement vertical line positioning correction method, which comprises the following steps of: selectinga position with a stable bank slope and a good sighting condition near a river bank hydrological survey section to mount and fix a non-contact side-scan flow velocity measurement instrument, and testing the installation elevation H of the measurement instrument. According to the method, by providing the river non-contact side-scan flow velocity measurement fixed velocity measurement vertical linepositioning correction method, the positioning error of the fixed velocity measurement vertical line caused by the change of the water level is eliminated, the observation precision of river flow canbe improved to the maximum extent, and the requirements of river flood prevention, water resources and ecological environment are met; the method fills the blank of a river non-contact side-scan flowvelocity measurement fixed velocity measurement vertical line positioning correction method, and is suitable for popularization and application.

Description

technical field [0001] The invention relates to the technical field of hydrological testing applications, in particular to a method for positioning and correcting a fixed speed-measuring vertical line for non-contact side-sweep flow velocity measurement of a river. Background technique [0002] For river flow measurement of international standards, the point flow velocity of enough velocity-measuring vertical lines is generally measured by the flow meter, the average flow velocity of the vertical line is calculated from the point flow velocity, and the partial flow rate is calculated according to the flow velocity area method between two vertical lines, and the total flow rate between all vertical lines is accumulated. Flow gets River Flow. The selection of the speed measuring vertical line needs to go through a large number of flow comparison tests, and is optimized and determined by the principle of the minimum error of the flow test. Relatively fixed, called a fixed velo...

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
Patent Type & Authority Applications(China)
IPC IPC(8): G01P5/00G01C13/00
CPCG01P5/00G01C13/00
Inventor 许全喜熊明李雨吴琼
Owner BUREAU OF HYDROLOGY CHANGJIANG WATER RESOURCES COMMISSION
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