Development And Research On The Data Acquisition Of Vacuum Device

Vacuum coating machine is a kind of typical vacuum application device which is anexcellent representative of the machinery-electric-meter combination. Today, thevacuum coating device is equipped with well automatic control system. As thedemand for speed and precision of data acquisition is higher and higher, the vacuumsystem that is equipped with excellent data acquisition system is also on the agenda.Research and development of data acquisition system that there is high speed andprecision has the positive significance for vacuum device, such as safety production,stable operation, efficiency improvement, labor intensity reduction, etc.This paper introduces the general structure and the development trend of coatingmachine, and it discusses the basic framework of data acquisition system of coatingmachine with the film coating process. It introduces the data acquisition system ofvirtual instrument and the related concept, structure, performance features, developmenttrend of Lab VIEW. It analyzes the application of the LabVIEW data acquisitiontechnology in the coating machine system. It designs the signal acquisition and thetransmission circuit of temperature, vacuum degree and flow rate in the operation ofcoating machine. It chooses the data acquisition card of MP420as the interface betweenthe collection and personal computer, a data acquisition system that realizes the dataacquisition of ten channels is formed. It designs the monitoring program of dataacquisition system based on LabVIEW in the operation of coating machine, it includesthe main monitoring module of temperature, vacuum degree and flow rate, otherauxiliary modules such as the parameter setting of system panel, the control button andthe indication of result. The program has some functions such as multichannelacquisition, real-time display and storage management, so as to realize real-timemonitoring in the process of coating machine operation, and its sampling rate isadjustable, historical data can be queried.The virtual instrument system designed in this paper has been performed throughsimulation. Due to the characteristics of modularity, openness and flexibility of virtualinstrument, as well as the key in the software, its modification, update or reset is veryconvenient, there is no necessary to start from scratch.