Real-time detection method of soft abrasive flow abrasive group

A technology of real-time detection and detection method, applied in the direction of testing moving fluids/granular solids, etc., can solve the problems of poor rapidity and poor accuracy of detection methods

Inactive Publication Date: 2012-12-19
ZHEJIANG UNIV OF TECH
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Problems solved by technology

[0004] In order to overcome the shortcomings of poor rapidity and poor accuracy of the existing soft abrasive flow abrasive particle group detection method, the present invention provides a real-time analysis method for soft abrasive particle fl

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  • Real-time detection method of soft abrasive flow abrasive group
  • Real-time detection method of soft abrasive flow abrasive group
  • Real-time detection method of soft abrasive flow abrasive group

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Embodiment Construction

[0055] The present invention will be further described below in conjunction with the accompanying drawings.

[0056] refer to Figure 1~Figure 5 , a method for real-time detection of abrasive particles in a soft abrasive flow, the detection method comprising the following steps:

[0057] 1) Let Ω 1 It is a two-dimensional physical space model, the liquid-solid two-phase soft abrasive particle flow is the medium of the space, and the instantaneous interface of the abrasive particle group is the interface. The phase field function φ(x,t) is assumed to be a specific constant at each bulk phase, and to undergo rapid and smooth changes at the interface. The relationship between the two-phase fluid and its interface at time t is defined by the following formula:

[0058]

[0059] Establish the phase field model two-phase interface mixing energy equation:

[0060] W ( φ , ▿ φ ) ...

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Abstract

A real-time detection method of a soft abrasive flow abrasive group comprises the following steps: 1) establishing a phase-field model two-phase interface mixed energy equation according to the distribution condition of the soft abrasive flow abrasive group, also establishing a control equation of the phase-field function evolution, finally approximating a viscous phase and a surface pressure phase by a traditional second order center difference scheme, performing spatial discretization reconstruction of the control equation by a fifth order WENO scheme, performing discretization in the time direction by a Runge-Kutta method with a TVD property, and thus solving the two-phase interface to obtain a theoretical model of the abrasive group distribution; 2) performing real-time image processing of the distribution area of the abrasive group in a constraint channel obtained by a soft abrasive flow image acquisition device according to the obtained theoretical model of the abrasive group distribution, and thus extracting a contour feature of the abrasive group distribution area to obtain the change condition of the abrasive group dynamic boundary. The invention effectively detects the distribution condition of the soft abrasive flow abrasive group.

Description

technical field [0001] The invention relates to the field of soft abrasive flow precision machining, in particular to a method for real-time detection of soft abrasive flow turbulence images. Background technique [0002] In recent years, with the rapid development of my country's mold industry, its application scope has involved many industries such as machinery, light industry, electronics, and building materials. Most traditional mechanical processing methods of molds use CNC milling or EDM for roughing or semi-finishing, but there are still processing traces after processing, so finishing has become an essential and important process. The liquid-solid two-phase soft abrasive particle flow can form turbulent flow on the structured surface of the processed workpiece. It does not forcefully impact the processed surface in the form of a jet, but uses the frequent action of the micro-force and micro-cutting of the abrasive particles to achieve the surface. Step by step smoot...

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Application Information

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IPC IPC(8): G01N21/85
Inventor 计时鸣张微谭大鹏周龙兵王嘉琦李宜燃
Owner ZHEJIANG UNIV OF TECH
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