基于PIC16F716的吹膜定径控制器设计

The Design About the Controller of Inflation Film Base on PIC16F716

针对目前市场上普通的定径控制器控制精度低,而高档的定径控制器成本高的缺点,本文提出了一种低成本、高精度的控制方案。该方案采用线阵CCD进行非接触式测径,并根据测得的直径进行开关控制或PI调节,最后输出控制信号控制线性比例阀。根据定径控制实际情况,在不影响精度的情况下,将CCD测径装置和线性比例阀进行简化,以利于制作和降低成本。通过试验,验证了该方案的正确性及可行性,提高了定径的精度,并大幅度降低了成本。

A new low cast and high degree of accuracy design means about a controller of inflation film is presented in this paper.In this scheme,diameter of film pipe may gain through linear array CCD.Proportional valve can adjust gas capacity,using bang-bang control or PI adjustment according the diameter.In order to decrease cast,linear proportional valve and CCD device should be simplified.