| 摘要 |
<p>An acceleration sensor having uniform characteristics of detection and improved low-frequency characteristics of detection. The acceleration sensor comprises a first piezoelectric plate (11), a second piezoelectric plate (12) connected directly to the first piezoelectric plate (11), a first external electrode (13) provided on the main surface of the first piezoelectric plate (11), and a second external electrode (14) provided on the main surface of the second piezoelectric plate (12). The first piezoelectric plate (11) and the second piezoelectric plate (12) are joined so that the polarization axis may be opposite. This structure is substantially L-shaped, that is, their support (15) is thicker than the other portions (capable of free vibration).</p> |
