Fluorescent magnetic inspection system used by special CCD cameras to identify axles of railway vehicles

This paper has summarized the achievements in the research on the digital image sampling and processing system for the automation of the fluorescent magnetic inspection for the axles of railway vehicles. The hardware of the system consists of 3 line array CCD-cameras, a multiplex A/D converter and an advanced microcomputer and its software has the functions of waveform display, real-time sampling and processing as well as automatic decision. A new method of intermittent driving with a long integration time and a high driving frequency is employed in the CCD-camera.