Algorithms of Signal Processing in the System for High-Speed Corrugation Monitoring of Rails

In real operating conditions of the control systems based on the parallax method with structured laser illumination, due to background solar illumination, nonlinear distortions of signals, known as the blooming effect, may occur. Such distortions lead to a decrease in the accuracy of the systems of operational control of straightness of railroad rails based on the above method. The purpose of the research presented in this paper is to evaluate the effectiveness of the subpixel peak position refinement algorithm under normal conditions and under background illumination conditions in an operational high-precision inspection system. As a result of numerical experiments of the rail surface straightness control system model, the effectiveness of subpixel refinement algorithms is investigated in the presence of internal noise of the image registration device, as well as in the presence of distortions caused by the blooming effect.