| 摘要 |
A pressure-receiving cylinder (11) is in a columnar shape extending in the direction of a center axis (O), and having an orthogonal cross section to the center axis (O) that defines a rotationally symmetrical contour. In a piezoelectric ceramic structure (12), piezoelectric ceramic modules are arranged in a rotationally symmetrical manner around the center axis (O), each piezoelectric ceramic module including a pair of piezoelectric ceramic and electrodes connected thereto in the polarization direction. Containers (8, 10) are connected to respective ends of the piezoelectric ceramic module (15) in the polarization direction, and apply a stress corresponding to an external force received by the pressure-receiving cylinder (11) to the pressure-receiving cylinder (11) and the piezoelectric ceramic structure (12). Respective voltages output by the plurality of piezoelectric ceramic modules are added together.
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