Groundwork for Rail Flaw Detection Using Ultrasonic Phased Array Inspection
نویسنده
چکیده
An apparent increase in the detectability of certain flaws results when the ultrasonic inspection beam was oriented off the longitudinal axis of railroad rail. Here, artificial reflectors were used to better define the extent of material "seen" by inspection beams, and determine how surface curvature might affect the inspection. Presumably, such information could be useful for suggesting optimum positioning of linear array probes in testing, and help determine the validity of simulation models of this inspection for various cases.
منابع مشابه
Submitted for “Identification of Existing and Emerging Microelectromechanical Systems (MEMS) Applications” session, sponsored by committee A2F09 Design and Testing of a MEMS Ultrasonic Transducer for Flaw Detection
Ultrasonic pulse-echo methods are versatile, effective procedures for inspecting welds in steel structures. However, the ultrasonic methods conventionally used have two disadvantages: inspection must be performed manually by a skilled technician, and the signal obtained at the time of one inspection provides no “memory” to be used at the time of a later inspection. Our research involves the dev...
متن کاملStudy on the Technology of Ultrasonic Imaging Detection based on Phase Array
Ultrasonic testing is an important flaw detection technology in nondestructive testing field. With its unique electronic scanning, dynamic deflection focusing (DDF), sectorial scanning characters and ultrasonic phased array (UPA) technology can be used for defecting detection of objects with curved face or complex structure. Thus, UPA technology has become a focus of ultrasonic testing research...
متن کاملDesign and Testing of a MEMS Ultrasonic Transducer for Flaw Detection
Ultrasonic pulse-echo methods are versatile, effective procedures for inspecting welds in steel structures. However, the ultrasonic methods conventionally used have two disadvantages: inspection must be performed manually by a skilled technician, and the signal obtained at the time of one inspection provides no “memory” to be used at the time of a later inspection. Our research involves the dev...
متن کاملPhased array ultrasonic imaging using an improved beamforming based total focusing method for non destructive test
One of the novel ultrasonic phased array based scanning methods for ultrasonic imaging in non-destructive test is total focusing method (TFM). This method employs maximum available information of the phased array elements and leads to an improved defect detection accuracy compared to conventional scanning methods. Despite its high detection accuracy, TFM behaves weak in distinguishing the real ...
متن کاملA MEMS Phased Array Transducer for Ultrasonic Flaw Detection
Metal structures can fail because of fatigue crack propagation or because of section loss from corrosion. Regular inspection is required to detect such failures. We report here progress toward the development of MEMS-based transducers for ultrasonic flaw detection, to be permanently mounted at critical locations on structures. In a complete system, a single piezoelectric element will be used to...
متن کامل