A Visual Basic.NET Based Online Inspecting System for
Portable Dvd, Zhixiang Xu, Yong Zhang, Jizhou Wang, Yuanxiong Zhang · 2009
It is a great challenge to inspect the quality of portable DVD (P-DVD) automatically during the mass production procedure. Inspecting a P-DVD needs such technologies as the automatic control on P-DVD, the automatic data acquisition, the digital signal processing of the audio and video signals, the channels switching and the user-friendly man machine interfaces. Based on Visual Basic.NET, this contribution ha s developed an automatic inspecting system for P-DVD quality control. To achieve high speed online inspection, the system chooses two high speed acquisition modules, two 110 PCI cards and a PC workstation as the platform. The quality of the video signal, audio signal, and voltage signal are analyzed and estimated. Then some technologies like the data acquisition, the control on DVD, the Switch Module, the GDI+ graphics programming and the multithreading programming technologies are employed. The developed automatic inspecting system in this paper has been applied to a P-DVD workshop floor in Dalian, China and ha s achieved satisfactory results. the single function, inefficiency, high cost and poor expandability . Moreover, because the results of the inspection are estimated and saved in the manual way, the error is obvious and the efficiency is low. The traditional ways are far from to meet the needs of the mass productions . Researchers around the world have been working for better solutions . In this paper we are going to develop a special Visual Basic.NET based automatic inspecting system to inspect the quality in the mass production sites. The system chooses two high speed acquisition modules, two I/O PCI cards and the PC workstation as the platform . Based on the theories of digital signal process and the virtual instrument technology , this system has analyzed and evaluated the voltage, the video signal and the audio signal automatically . The voltage inspection tests the voltage of the appointed test point. The radio signal inspection tests the signal from the DVD output terminal, the earphone output terminal, and the microphone output terminal. The video inspection tests the quality of the composite video broadcast signal and the video component signal. The developed automatic inspecting system in this paper has been applied to a P-DVD workshop floor in Dalian, China and has achieved satisfactory results. The developed system is a powerful tool for similar cases.