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    • 7. 发明申请
    • ULTRASONIC DETECTION DEVICE AND ULTRASONIC DIAGNOSTIC DEVICE
    • 超声检测装置和超声诊断装置
    • US20120163124A1
    • 2012-06-28
    • US13393918
    • 2010-10-28
    • Takahiro AkiyamaMakoto TakagiKazunari FujiiHidemasa Mizutani
    • Takahiro AkiyamaMakoto TakagiKazunari FujiiHidemasa Mizutani
    • G01N29/24B06B1/02
    • G01N29/2418B06B1/0292G01N29/2406G01N2291/101
    • Provided is an ultrasonic detection device including: a capacitive electromechanical transducer including a cell that includes a first electrode and a second electrode disposed so as to oppose with a space; a voltage source for developing a potential difference between the first electrode and the second electrode; and an electric circuit for converting a current, which is caused by a change in electrostatic capacitance between the first electrode and the second electrode due to vibration of the second electrode, into a voltage, in which the capacitive electromechanical transducer provides an output current with a high-pass characteristic having a first cutoff frequency with respect to a frequency, the electric circuit provides an output with a low-pass characteristic having a second cutoff frequency with respect to the frequency, and the second cutoff frequency is smaller than the first cutoff frequency.
    • 本发明提供一种超声波检测装置,其特征在于,包括:电容式机电换能器,其包括具有与空间对置配置的第一电极和第二电极的电池单元; 用于在第一电极和第二电极之间形成电位差的电压源; 以及用于将由于第二电极的振动而由第一电极和第二电极之间的静电电容的变化引起的电流转换成电压的电路,其中电容式机电换能器提供输出电流 具有相对于频率具有第一截止频率的高通特性,所述电路提供具有相对于所述频率具有第二截止频率的低通特性的输出,并且所述第二截止频率小于所述第一截止频率 。