| 摘要 |
<p>An eddy current sensor includes: an excitation coil (20) that applies a predetermined alternating-current excitation signal to a measurement target component (15); and a detection coil (30) that detects a detection signal, generated by eddy current, from the measurement target component to which the alternating-current excitation signal is applied. The excitation coil has a plurality of solenoid coils (21a, 21b). The detection coil is arranged at least on one of two sides of the excitation coil in a direction of a central axis of each solenoid coil. Then, the plurality of solenoid coils are arranged in parallel with one another so that winding directions of the adjacent solenoid coils are opposite to each other.</p> |
