Abstract
Based on the laser inspecting technology and optical triangulation measuring principle, an on-line inspecting system for steel plate thickness was presented, which is an optoelectronic inspecting equipment used non-contact on-line automatic measurmg thickness of rolling steel plate in steel industry. The system used two semiconductor laser probes to realize the measurement of steel plate thickness. The measured result of steel plate thickness is directly given out. According to the request of on-line inspection, the system can make real-time processing for the measured data, and provide analog or digital feedback control signal to realize the closed loop control for rolling machine. In addition, the system has also many functions such as correcting system errors, acoustic and light alarming for exceeding the tolerance .limits, displaying and printing measured results etc. In this paper, the overall structure, working principle and optoelectronic information as well as data processing electronic system of the system were described. The theoretical problems related to the design of the system were discussed in detail.
