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    • 1. 发明申请
    • CONTROL APPARATUS FOR CAPACITIVE ELECTROMECHANICAL TRANSDUCER, AND METHOD OF CONTROLLING THE CAPACITIVE ELECTROMECHANICAL TRANSDUCER
    • 电容式电磁传感器的控制装置及其控制电容式电磁传感器的方法
    • WO2011070729A1
    • 2011-06-16
    • PCT/JP2010/006717
    • 2010-11-16
    • CANON KABUSHIKI KAISHAKANDORI, AtsushiTAKAGI, MakotoMAJIMA, MasaoNAGAE, Kenichi
    • KANDORI, AtsushiTAKAGI, MakotoMAJIMA, MasaoNAGAE, Kenichi
    • B06B1/02H01L29/84
    • H02N1/006B06B1/0246B06B1/0292G01S3/8083
    • Provided is a control apparatus and control method for a capacitive electromechanical transducer with small decrease in transmission/reception efficiency, and with sets of transmission/reception characteristics with different frequency ranges. The apparatus has cells each including first and second electrodes facing each other via a gap; includes a driving/detecting unit and an external stress applying unit. The driving/detecting unit performs at least one of causing the second electrode to vibrate and transmit elastic waves by generating an AC electrostatic attractive force between the electrodes, and detecting a change of capacitance between the electrodes, the change being caused by the second electrode vibrating upon receipt of elastic waves. The external stress applying unit changes the external stress applied to the second electrode. The driving/detecting unit adjusts frequency characteristics by changing a parameter defining the frequency domain used in a transmitting/receiving operation, corresponding to the change of the external stress.
    • 提供了一种用于容量式机电换能器的控制装置和控制方法,其具有小的发送/接收效率的降低以及具有不同频率范围的发送/接收特性的集合。 该装置具有各自包括经由间隙彼此面对的第一和第二电极的单元; 包括驱动/检测单元和外部应力施加单元。 驱动/检测单元执行以下至少一种:使第二电极通过在电极之间产生AC静电引力而振动并传播弹性波,并且检测电极之间的电容变化,由第二电极振动引起的变化 收到弹性波。 外部应力施加单元改变施加到第二电极的外部应力。 驱动/检测单元通过改变与发生/接收操作中使用的频域相对应的外部应力变化的参数来调整频率特性。