Device and method for liquid jet spray boundary positioning

A technology of liquid jet and positioning device, applied in measurement devices, optical devices, instruments, etc., can solve problems such as inability to obtain spatial distribution information, and achieve the effect of preventing human intervention, ensuring integrity, and result standards

Active Publication Date: 2018-05-25
NAT UNIV OF DEFENSE TECH
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the PDA method can obtain the spray spatial distribution information more accurately, but most direct imaging methods are often unable to obtain accurate and objective spatial distribution information due to the limitations of imaging quality, data processing methods, and imaging methods themselves.

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
  • Device and method for liquid jet spray boundary positioning
  • Device and method for liquid jet spray boundary positioning
  • Device and method for liquid jet spray boundary positioning

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] In this embodiment, the boundary positioning is performed on the spray formed by spraying the liquid jet into the air perpendicular to the incoming air flow. The invention can also be implemented in other different ways, such as the boundary positioning of the spray cone when the liquid jet is sprayed into still air.

[0027] This embodiment provides a liquid jet spray boundary positioning device, its structure is shown as figure 1 shown. The device includes a sheet laser 1 , a synchronous controller 2 , a CCD camera 3 , a computer 4 and a shooting area 5 .

[0028] The boundary positioning process and principle of the present invention are as follows: figure 2 shown. In a dark room environment, the sheet light laser 1 emits pulsed laser sheet light 11 to instantly illuminate a section of the spray, and at the same time, the focal plane of the CCD camera 3 coincides with the illuminated section, and the synchronous controller 2 controls the CCD camera 3 and the shee...

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

A liquid jet spray boundary positioning device and method, including a sheet laser, a synchronous controller, a CCD camera, and a computer. The spray boundary positioning method includes two steps. First, the image is acquired: the entire shooting process is carried out in a darkroom environment, and the computer cooperates The sheet light laser, synchronous controller and CCD camera work together, the sheet light laser emits pulsed laser sheet light to irradiate the liquid jet spray, the CCD camera focuses on the illuminated spray plane, and the synchronous controller controls the laser sheet light to illuminate The time of spraying is just within the exposure time period of the CCD camera; then image processing: the computer receives multiple images from the CCD camera in real time, and uses the gray integration method to locate the spray boundary, that is, to accumulate the gray value of each point of the multiple images In the integral calculation, the values ​​exceeding the highest gray value are all set to the highest gray value, and finally the gray threshold method is used to extract the spray boundary. The invention can accurately and quickly acquire spray boundary information.

Description

technical field [0001] The invention specifically relates to the fields of optical measurement methods and image processing, and in particular to a device and method for locating the boundary of a liquid jet spray. Background technique [0002] In the background of supersonic vehicle research, the scramjet engine has attracted much attention as the most likely and first realized propulsion method. The atomization effect of kerosene and other liquid fuels inside the scramjet directly determines the combustion efficiency and working performance of the engine. The spatial distribution of the atomized spray is crucial to the combustion efficiency of the engine. Generally, the commonly used indicators for evaluating the spatial distribution of spray include spray cone angle, penetration depth and spanwise distribution, etc. At present, the methods for studying the spatial distribution of spray mainly include direct imaging method, PDA method and Malvern method. Among them, the...

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 Patents(China)
IPC IPC(8): G01B11/24
Inventor 吴里银王振国李清廉李春
Owner NAT UNIV OF DEFENSE TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap