PURPOSE: To obtain an almost cylinder-shaped polymer piezoelectric element, whose bendability and shock resistance are superior, and which is suited to the transmission and reception of a sound wave, and to provide a hydrophone whose satisfactory wave receiving sensitivity and bendability are maintained by reducing a deformed noise by using the polymer piezoelectric element.
CONSTITUTION: A bendable band-shaped piezoelectric element 10 in which mutually opposed electrode layers 2a and 2b are provided at the both faces of a band-shaped polymer piezoelectric body 1, is spirally wound around a certain shaft 0, and an arrangement structure approximating a cylinder can be obtained as a whole. The plural pairs of opposed electrode layers can be provided at an interval in the length direction of the band-shaped piezoelectric body. It is desired that a pair of band-shaped polymer piezoelectric bodies are used for forming the hydrophone, and laminated through a central metal layer so that the mutual polarizing directions can be opposed.
MURAKAMI NORIMICHI
YOSHITAKE NORIYUKI
SATO TAKU
SUZUKI KAZUMOTO
NAKAMURA KENICHI
KUREHA CHEMICAL IND CO LTD
| JPH01208098A | 1989-08-22 | |||
| JPH0277676A | 1990-03-16 | |||
| JPS55121799A | 1980-09-19 |