Rail is an important part of railway track.Timely detection of the rail quality condition is very important to ensure the safe operation of the train.Among them,the irregular section shape and structure,and non-uniform stress of the rail bottom are very easy to lead to rail fracture and cause heavy losses.Based on ultrasonic phased array technology,a transverse fan scanning technology of ultrasonic phased array is proposed in this paper.This technology uses the fixed inclination angle of wedge to achieve the oblique incidence of probe without left and right deflection,which expands the detection range of the original conventional scanning technology.Through simulation and capability verification test block experiment,this paper verifies that the ultrasonic phased array transverse fan scanning technology can meet the requirements of rail bottom detection coverage,and can realize automatic scanning in one-dimensional direction.
rail weld crackrail bottom detectionultrasonic phased arraytransverse fan scanning
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