Rotating axle surface crack on-line detection system and detection method

• Main Authors: GAN CHUNBIAO, LIU XUEKUN, YANG SHIXI, LIU YONGQIANG, WANG JINHAO
• Format: Patent
• Language: English
• Published: 27.01.2016
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

The invention relates to an on-line detection system and a detection method for rotating axle surface crack. The detection method comprises the following steps: a laser frequency controller controls laser pulse emission frequency according to the rotation speed of the axle; two air-coupling receiving probes are arranged separately at a position of circumferential 90 degrees of a laser supersonic excitation source and in an axially collinear direction for receiving circumferential supersonic wave and axial supersonic wave excitated by the laser; characteristic values of axial and circumferential supersonic signals are extracted by using a signal processing method; existence of a crack and severe degree of the crack are determined, when a crack is present at a certain position, a computer automatically stores crack position and receiving time, and makes a tridimensional graph of time-amplitude-position of the axial and circumferential supersonic signals, and visualizes the crack condition of the position of the rotating axle. The detection system can on-line detecting the crack condition of the rotating axle in an invasive, non-contact, and remote manner, can quickly determine a transverse and longitudinal posture and position; the detection accuracy is high.