专利名称：ULTRASONIC CALCULUS CRUSHING
APPARATUS AND ULTRASONIC PULSE
DRIVE CIRCUIT
如何提高亲和力发明人：AIDA SATOSHI,IWAMA NOBUYUKI
申请号：JP7607788
qsi申请日：19880331
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公开号：JPH01250242A
公开日：
夏天如何保养皮肤
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fly power专利内容由知识产权出版社提供
摘要：PURPOSE:To eliminate the irradiation with unnecessary harmful energy and to obtain a pul drive circuit having high reliability, by controlling the output of a high voltage drive circuit on the basis of the signal from a detection means for detecting the relative position of a probe and a transducer and providing an over voltage absorbing means in parallel to a piezoelectric vibrator. CONSTITUTION:A crushing transducer 1 is constituted of a plurality of ultrasonic vibrators and each of the vibrators is driven by a high voltage pulr 3. An imaging ultrasonic probe 2 is arranged to the central part of the transducer in a movable manner to extract the image in a living body. A position detecting circuit 4 is connected to the probe and the signal corresponding to the relative position of the transducer and the probe is nt to a controller 5 and the output of the aforementioned high voltage pulr group is controlled herein according to said relative position. By this method, the output of the vibrator of a part 16 becoming shade with respect to a geometrical focus 6 is lowered to suppress ineffective output and the unnecessary irradiation of normal tissue is prevented. An overvol读英语在线发音
tage absorbing element 28 is mounted to a drive circuit in parallel to a piezoelectric vibrator 24 to absorb
overvoltage generated at the time ot a load state and the generation of the pul output of the next time is stopped.
young game申请人：TOSHIBA CORPprotocol
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