| 摘要 |
A collision position detection device (50) comprises: a piezoelectric element (51) that generates a voltage by collision; signal detection means that detects a signal generated by the collision with the piezoelectric element (51); and processing means that identifies the position of the collision with the piezoelectric element based on the signal detected by the signal detection means. The piezoelectric element (51) is a long piezoelectric element (51) comprising a long piezoelectric body (51b), conductors (51a, 51c) layered on both surfaces of the piezoelectric body (51b), and a covering body (51d) that covers the peripheries of the conductors, wherein both of a leading end signal generated from a leading end of the long piezoelectric element (51) and a back end signal generated from a back end of the long piezoelectric element (51) can be detected to identify a collision position. The disposition of the collision position detection device in a windmill blade enables information about a bird colliding with the blade to be detected. |
