Imaging method and device for track board internal defect detection

• Main Authors: ZHU WENFA, ZHANG MENGKE, FAN GUOPENG, ZHANG HUI, CHENG YAO, ZHANG HAIYAN
• Format: Patent
• Language: Chinese; English
• Published: 23.06.2020
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

The invention discloses an imaging method and device for track board internal defect detection. The imaging method is characterized in that the imaging method comprises the following steps: exciting by using an ultrasonic transmitting and receiving device, transmitting an ultrasonic signal with the frequency between 20 and 100kHz into a track plate by using an ultrasonic array sensor, acquiring areflection echo signal of an internal defect of the track plate by using the ultrasonic array sensor in a one-transmitting and multi-receiving mode, and transmitting the reflection echo signal to a computer; and then adopting MATLAB software by the computer to carry out data storage and signal processing on the received reflection echo signal, and then obtaining a three-dimensional image of the internal defect of the track plate according to a time domain synthetic aperture focusing imaging algorithm and a three-dimensional imaging technology. According to the method, the internal defects of the track plate can be eff