Liquid drop surface tension measuring method based on OpenCV, terminal and medium

• Main Authors: FU GUANGJIE, CHEN SHICHAO, XU HUIYAO, WANG TINGLU, LI XIN, RUI YUNJUN, CAI JUNQING
• Format: Patent
• Language: Chinese; English
• Published: 30.04.2024
• Subjects: CALCULATING; COMPUTING; COUNTING; IMAGE DATA PROCESSING OR GENERATION, IN GENERAL; PHYSICS

The invention discloses a liquid drop surface tension measuring method based on OpenCV, a terminal and a medium. An accurate method for measuring the surface tension of a liquid drop is determined through combination of OpenCV machine vision and contour fitting. The method comprises the following steps: firstly, preprocessing an original liquid drop image to obtain an actual contour of a liquid drop; and then according to an initial value of a Bundy number beta set by Neesson, solving a Young-Laplace equation by using a four-order Runge-Kutta algorithm to obtain an abscissa x, an ordinate y and a curvature radius R, and on the basis, obtaining an initially-fitted theoretical contour diagram. And then fixing the radius R of curvature, constructing an error function, using cubic spline interpolation to assist in calculating an arc length parameter si, and using a Newton-Raphson method to determine an arc length parameter corresponding to a minimum error along the curve. Finally, an LMF-AO algorithm is used for