| 摘要 |
A method of processing signals acquired during guided wave testing of an elongate member (2), such as a pipe, in which at least one guided wave (7) is generated in the elongate member, the at least one guided wave is reflected by reflectors (8) in the elongate member and reflected guided waves (9) are detected. The method comprises determining at least one reflection coefficient or a parameter for calibrating a guide wave test in dependence upon reflections from the reflectors which include at least one multiple reflection. The reflections may include a single reflection from a first reflector, a single reflection from a second reflector and a multiple reflection from the first and second reflectors. |
