| 摘要 |
This piezoelectric sensor (1) is provided with a piezoelectric element (10) which includes a piezoelectric layer (11) containing elastomer and piezoelectric particles and which includes electrode layers (12a, 12b) containing elastomer and a conductive material. The breaking elongation of the piezoelectric element (10) is equal to or greater than 10%, and the volume resistivity of the electrode layers (12a, 12b) in the natural state and in the elongated state of being elongated in an axial direction by up to 10% from the natural state is not greater than 100 Ω·cm.<b/>The piezoelectric element (10) is capable of being elongated/retracted, and has the piezoelectric performance even in the elongated state. |
