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Model-free control method for focal distance of injection molded plastic lens

A control method and injection molding technology, which can be applied to other household appliances, optical components, household appliances, etc., and can solve the problems of poor gradient estimation accuracy, low work efficiency, and process noise sensitivity.

Inactive Publication Date: 2013-04-17
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the actual industrial production process, this method is sensitive to process noise. In the presence of uncertain factors such as noise, the accuracy of gradient estimation is poor, and the work efficiency of the method is low.

Method used

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  • Model-free control method for focal distance of injection molded plastic lens
  • Model-free control method for focal distance of injection molded plastic lens
  • Model-free control method for focal distance of injection molded plastic lens

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0053] The implementation process of the model-free control method for the focal length of an injection molded lens is illustrated below by taking the focal length control of a plastic magnifying glass lens as an example.

[0054]First, the method is initialized through step (1); the focal length of the lens controls the target =90 mm, according to the focal length noise fluctuation of the lens and the focal length tolerance of the lens, set the focal length target deviation tolerance mm, weight fluctuation variance tolerance mm, number of repetitions , the number of repeated measurements , the number of validation trials , the maximum number of trials , the parallel perturbation algorithm coefficient ; Select the process parameters that need to be optimized: injection pressure, holding pressure and holding time, in which the injection section is divided into one section and two sections to be controlled respectively, and the subsection point is also a key process...

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Abstract

The invention discloses a model-free control method for the focal distance of an injection molded plastic lens. According to the invention, aiming at the problems such as frequent change of operation parameters, difficulty of process modeling, limited model precision and the like existing in the focal distance control process of the injection molded plastic lens, the model-free control method forthe focal distance of the injection molded plastic lens is designed according to the characteristics of the injection molded plastic lens that the cost in the production process is low and the batch can be repeated, thus the control on the focal distance of the plastic lens is realized. By utilizing the control method, the control overhead can be reduced, and the control time is shortened, thereby improving the focal distance control efficiency, and being beneficial to the energy conservation and emission reduction in the production process of injection molded lenses.

Description

technical field [0001] The invention relates to the field of focal length control of injection molding plastic lenses, in particular to a model-free control method for focal length of injection molding plastic lenses. Background technique [0002] The focal length of the lens is linearly related to its diopter, which is an important quality index of the plastic optical lens, and its size and stability reflect the quality characteristics of the lens. Focal length control is of great importance for the quality control of lenses, especially for plastic optical lenses produced by injection molding. Because injection molding is a complex, multi-stage and nonlinear intermittent production process, and there are many process parameters that affect the focal length of injection lenses, it is difficult to establish a process model, and there are often uncertain factors such as noise in the actual injection molding process. All of these make it difficult to efficiently realize the fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C45/76B29L11/00
Inventor 陈曦孔祥松邵之江王喆
Owner ZHEJIANG UNIV
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