由于铁路运输速度和载重的不断增长,对钢轨质量提出了越来越高的要求,在线超声波探伤成为生产高质量钢轨的必要手段。固定接触式超声波探伤装置与钢轨属于刚性接触,易磨损,探伤准确率低,针对这一缺点,提出了随动探伤设计理念,阐述了随动式超声波探伤装置的工作原理、结构组成及设备特点。该装置的应用大幅降低了超声波误判率和重轨在线检测成本。 Due to the increasing speed and load of railways, higher and higher requirements are placed on rail quality. On-line ultrasonic flaw detection becomes an essential means of producing high-quality rails. Fixed contact ultrasonic flaw detection device is rigid contact with the rail, easy to wear, low detection accuracy, in view of this shortcoming, put forward the concept of follow-up flaw detection, described the follow-up ultrasonic flaw detection device working principle, structure and equipment features . The application of this device significantly reduces the false positive rate of ultrasonic detection and the on-line detection cost of heavy rail.