| 摘要 |
PROBLEM TO BE SOLVED: To provide a diagnostic method of evaluating the fixed state of an anchor bolt to concrete.SOLUTION: An electromagnet 12 is disposed around a part of an anchor bolt 2 that is exposed from the surface of concrete 1, pulse current is made to flow through the electromagnet 12, and a detection element 13 detects sound generated by displacement of the anchor bolt 2. An analysis processing unit 14 frequency-analyzes the detected signal and diagnoses the fixed state of the anchor bolt 2 to the concrete 1 on the basis of the variation in wave of a frequency spectrum. |
