基于虚拟仪器技术的膜涂敷控制系统

Coating techniques of hollow fiber composite membrane based on virtual instrument technology

为制备高性能的中空纤维复合膜,研制了一套涂敷设备,在中空纤维基膜上形成超功能层。该设备包含多个反应釜,每个反应釜都要保持恒定的温度。在整个涂敷过程中,中空纤维膜不能断裂并保持一定的张力,因此,基于虚拟仪器技术,利用美国NI公司的PCI-6703、PCI-6221以及PCI-4351来实现反应釜各参数的控制。研究结果表明,该控制系统可完成温度采集与控制、涂敷过程的速度调节、张力控制等。

To getting the hollow fiber composite membrane with high performance, One set of coating plant was proposed. The additional function layer was formed in the surface of the hollow fiber membrane with the plant, including several reaction kettles. The liquids in the kettle must keep constant temperature. The hollow fiber membrane should be kept constant tension to avoid being pulled apart during coating. The control system based on virtual instrument for the plant was proposed and was constructed with PCI-6703 ,PCI-4351 and PCI-6221. The results show that the control system can realize the heating control, the speed control and the tension control.