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Ultrasonic probe device and its control method
专利权人:
发明人:
Miyuki Murakami
申请号:
US13774301
公开号:
US08867314B2
申请日:
2013.02.22
申请国别(地区):
US
年份:
2014
代理人:
摘要:
An ultrasonic probe device includes capacitive micromachined ultrasonic transducers, a band control unit and a bias voltage change unit. Each of the transducers belongs to one of groups, each of the groups includes at least one of the transducers. The band control unit determines the bias voltage value which varies for each of the groups, and a timing to apply the direct-current bias voltage having the bias voltage value so that all frequencies included in an operating frequency are transmitted and/or received by the ultrasonic probe device during an operation period. The bias voltage change unit changes the direct-current bias voltage to be applied to the capacitive micromachined ultrasonic transducers in accordance with the bias voltage value and the timing.
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