| 摘要 |
PURPOSE:To generate and detect longitudinal waves and transversal waves selectively with one probe, by providing two coils for magnet and changing the direction of a generated magnetic field by the selection of them. CONSTITUTION:The first coil 11 for magnet is wound around a column 10a of an iron core 10 for magnet, and the second coil 12 for magnet is wound around a cylinder 10b of the iron core 10. The first flat coil 13 is arranged near the lower end of a groove 10c between the column 10a and the cylinder 10b of the iron core 10, and the second flat coil 14 is arranged in the lower end face of the column 10a. When the coil 11 is selected, the spiral first flat coil 13 is used as a coil for generating and detecting an eddy current to obtain the probe for generating and detecting ultrasonic waves of logitudinal waves. When the coil 12 is selected, the seocnd flat coil 14 is used to obtain the probe for generating and detecting ultrasonic waves of transversal waves. |
