Automatic detection method of static contact angle and dynamic contact angle

A technology of static contact angle and dynamic contact angle, which is used in measuring devices, instruments, scientific instruments, etc., can solve the problems of doubling the workload and calculation time, and achieve the effect of high accuracy, high calculation accuracy, and improved accuracy.

Inactive Publication Date: 2011-10-05
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
View PDF4 Cites 29 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Doubling the workloa

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
  • Automatic detection method of static contact angle and dynamic contact angle
  • Automatic detection method of static contact angle and dynamic contact angle
  • Automatic detection method of static contact angle and dynamic contact angle

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0027] See attached figure 1 , The steps of applying the present invention are:

[0028] (1) Use a digital camera or CCD camera combined with an image capture card to take a picture of the water droplets on the material, and the camera plane is perpendicular to the material plane;

[0029] (2) Use the level set method to obtain the edge of the water droplet on the obtained water drop image;

[0030] (3) According to circle, ellipse fitting and polynomial fitting, fitting is performed to eliminate the edge of the droplet near the needle tube. According to the size of the obtained error, it is judged as static contact angle, advancing angle image or receding angle image, if the former is smaller than the latter, it is Static contact angle or advancing angle image; otherwise, receding angle image;

[0031] (4) When calculating the static contact angle or advancing angle, choose the circle fitting method or the ellipse fitting method, select the edge to be fitted according to the fitting ...

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 an automatic high-accuracy droplet calculation method of dynamic and static contact angles. The method of the invention is realized by obtaining the droplet edge of a shot clear drop image with a level set method and judging whether the image is a static contact angle, an advancing angle or a receding angle. For a static contact angle image, if the droplet is large in size, an ellipse fitting method should be employed, while if the droplet size and the contact angle are both small, a circle fitting algorithm is chosen. If to calculate an advancing angle, a circle fitting or ellipse fitting algorithm is chosen. If to calculate a receding angle, a polynomial fitting algorithm is employed. By obtaining the tangent of a curve resulting from fitting at a droplet marginal point corresponding to a triplet, two contact angles respectively on the left and right are then obtained. The average of the two contact angles is a final contact angle. According to the method of the invention, dynamic and static contact angles can be calculated rapidly and automatically, with high rate of accuracy.

Description

technical field [0001] The invention relates to an automatic algorithm of static contact angle and dynamic contact angle for hydrophobicity detection, which belongs to the field of material performance testing. Background technique [0002] Porcelain and glass insulators are made of hydrophilic materials, which have small surface resistance in the case of pollution and wetness, resulting in low pollution flashover voltage. Silicone rubber has hydrophobicity and water-repellent migration characteristics, and still has a high surface resistance in a dirty and wet environment, so it has a high pollution flashover voltage. Composite insulators and room temperature vulcanization (RTV) silicone rubber coatings are composed of silicone rubber materials, which have strong anti-pollution flashover capabilities and are widely used in external insulation of power systems. Hydrophobicity is a key characteristic of silicone rubber materials, and the surface of silicone rubber is easily ...

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): G01N13/00
Inventor 徐志钮律方成刘云鹏赵涛李和明
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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