| 摘要 |
<P>PROBLEM TO BE SOLVED: To properly transmit/receive ultrasonic waves while preventing a deterioration in designability of an appearance of a mounting object by a simple constitution. <P>SOLUTION: An aerial ultrasonic sensor 1 comprises: a diaphragm that is constituted by fixing flat plates 12 and 13 together; a magnetic field generating section 11 that makes the diaphragm generate a magnetic field; and a coil 14 that makes the diaphragm generate an eddy current by making an electric current flow through a magnetic field area generated by the magnetic field generating section 11. Ultrasonic waves are generated by vibrating the diaphragm by interaction between the magnetic field and the eddy current. <P>COPYRIGHT: (C)2013,JPO&INPIT |
