| 摘要 |
PURPOSE:To provide a novel method and a apparatus, which simply detect the corrosion of a part that is buried in the ground, such as a stay rod from the ground surface. CONSTITUTION:The presence or absence of the occurrence of the corrosion of a metal rod such as a stay rod 1, which is buried in the ground, is detected as follows. An input-side sensor 5 and a detecting-side sensor 6 are attached to the stay rod 1 or the like, which is exposed on the ground. An elastic wave is applied from the input-side sensor 5. The reflected wave, which is reflected from the end part in the ground is detected with the detecting-side sensor 6. The reflected wave is converted into the electric signal, and the waveform diagram is formed with a sound wave analyzer 8. The corrosion s simply detected on the ground basing on the propagating state of the elastic wave in the stay rod 1 or the like. The pulse input is applied into the stay rod 1 or the like from a pulser 7 through the input-side sensor 5, and the reflected wave from the underground part is detected with the detecting-side sensor 5. The reflected wave is converted into the electric signal. The waveform diagram s formed with a sound wave analyzer 8. Thus, the presence or absence of the corrosion is judged with this corrosion detecting apparatus. |
