| 摘要 |
<p>PROBLEM TO BE SOLVED: To solve the problem that a coaxially flexible piezoelectric member cannot be wholly polarized in the case that defects are contained in the coaxially flexible piezoelectric member. SOLUTION: In this polarizing device, a piezoelectric member tube 3 is arranged in a path of a block-shaped conductor 6, high voltage is applied to the conductor 6 and a core electrode 1 of the tube 3, and a heater 7 is arranged which heats the conductor 6 and applies heat to the tube 3 arranged in the path of the conductor 6. Since the temperature of the tube 3 can be controlled by the above constitution, the coaxially flexible piezoelectric member 2 can be polarized at a necessary temperature. Furthermore, polarization is enabled except the coaxially flexible piezoelectric member 2 in parts containing defects, and it can be detected before an external electrode is formed that defects exist in the tube 3 of a defined length.</p> |
