| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a pMUT (Piezoelectric Micromachining Ultrasound Transducer) device suitable for two dimensional array probe capable of achieving a high sensitivity and a higher broad band. <P>SOLUTION: The ultrasonic probe is configured so that the resonant frequency is adjustable by giving an external force to a vibrating part. When transmitting, a different external force is given to each MUT element to achieve a broad band. When receiving, the resonant frequency is shifted according to the time elapsed from the transmission to receive an echo at an effective frequency band according to the depth of the echo. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
