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    • 24. 发明授权
    • Apparatus for bending an insertion section of an endoscope using a shape
memory alloy
    • 用于使用形状记忆合金弯曲内窥镜的插入部分的装置
    • US4930494A
    • 1990-06-05
    • US291242
    • 1988-12-28
    • Sakae TakehanaYasuhiro UedaMasakazu GotandaTomohisa SakuraiHideyuki Adachi
    • Sakae TakehanaYasuhiro UedaMasakazu GotandaTomohisa SakuraiHideyuki Adachi
    • A61B1/005A61F2/00A61M25/01F03G7/06
    • A61M25/0158A61B1/00147A61B1/0058F03G7/065A61F2210/0014A61M2205/0266
    • The distal end of an insertion section of an endoscope is divided into a plurality of segments each including a pair of SMA coils which are arranged symmetrically with respect to an axis and memorize a close-winding shape. As the SMA coils recovers their memorized shape, the distal end of the insertion section is bent. The SMA coils are restored to the memorized shape when they are conductively heated by means of a current supply circuit. The current supply circuit comprises an input unit for inputting a target value of the bend angle for a leading segment, a sensor for detecting the distance of insertion of the insertion section, a detector circuit for detecting the bend angle of each segment, and means for controlling the amount of current supply so that the bend angle of the SMA coils agrees with a target angle. The inputted angle is set as the target angle for the leading segment, and the detected bend angle of each segment is set as the target angle for each succeeding segment. The set value is renewed each time the insertion distance of the insertion section attains a predetermined distance.
    • 内窥镜的插入部的前端被分割成多个片段,每个片段包括一对相对于轴对称设置的SMA线圈并且记忆紧绕形状。 当SMA线圈恢复其记忆形状时,插入部分的远端弯曲。 当SMA线圈通过电流供应电路导电加热时,SMA线圈恢复到记忆形状。 电流供给电路包括用于输入前导部分的弯曲角度的目标值的输入单元,用于检测插入部分的插入距离的传感器,用于检测每个部分的弯曲角度的检测器电路,以及用于 控制电流供给量,使得SMA线圈的弯曲角度与目标角度一致。 将输入的角度设定为前段的目标角度,将各段的检测弯曲角度设定为每个后续段的目标角度。 每当插入部的插入距离达到预定距离时,更新设定值。
    • 26. 发明授权
    • Ultrasonic oscillation circuit
    • 超声波振荡电路
    • US4879528A
    • 1989-11-07
    • US238186
    • 1988-08-30
    • Masakazu Gotanda
    • Masakazu Gotanda
    • B06B1/02H03L7/02
    • H03L7/02B06B1/0253
    • A circuit for generating a driving signal for an ultrasonic vibrating element including a voltage controlled oscillator for generating an oscillation signal which is supplied to the ultrasonic vibrating element as the driving signal, a phase difference detector for detecting a phase difference between the voltage and the current of the driving signal to produce a control voltage corresponding to the detected phase difference, said control voltage being applied to a control input of the voltage controlled oscillator, a comparator for comparing the control voltage from the phase difference detector with a reference voltage to generate an output signal when the control voltage exceeds the reference voltage, and a voltage setter for responding to the output signal to reset the oscillation frequency of the voltage controlled oscillator to a predetermined frequency which is lower than the optimum resonance frequency so that the ultrasonic vibrating element is energized in the most efficient manner.
    • 一种用于产生用于产生提供给超声波振动元件的振荡信号的压控振荡器作为驱动信号的超声波振动元件的驱动信号的电路,用于检测电压与电流之间的相位差的相位差检测器 的驱动信号,以产生对应于所检测的相位差的控制电压,所述控制电压被施加到压控振荡器的控制输入;比较器,用于将来自相位差检测器的控制电压与参考电压进行比较, 输出信号,以及电压设定器,用于响应于输出信号,将压控振荡器的振荡频率重置为低于最佳谐振频率的预定频率,使超声波振动元件为 充满活力的最有效率 方式。
    • 29. 发明授权
    • Apparatus for generating ultrasonic oscillation
    • 用于产生超声波振荡的装置
    • US5151085A
    • 1992-09-29
    • US513230
    • 1990-04-23
    • Tomohisa SakuraiMasakazu Gotanda
    • Tomohisa SakuraiMasakazu Gotanda
    • A61B17/00A61B17/32
    • A61B8/546A61B17/320068A61B2017/0003
    • The apparatus includes an ultrasonic transducer having a hand piece, an ultrasonic vibrating element secured to the hand piece and a probe coupled with the hand piece for propagating the ultrasonic oscillation produced by the ultrasonic vibrating element, a driving circuit for producing a driving signal for the ultrasonic vibrating element, a voltage controlled amplifier for amplifying the driving signal, an impedance matching transformer having a plurality of primary windings connected to the output of the voltage controlled amplifier via a switching circuit and a secondary winding connected to the ultrasonic vibrating element, a probe identification circuit for detecting the probe connected to the hand piece to produce a probe identification signal, a feedback control loop for generating a control voltage which is applied to the voltage controlled amplifier for controlling the amplification factor thereof in accordance with a driving current of the driving signal, an impedance detecting circuit for detecting the impedance of the ultrasonic transducer and controlling the switching circuit such that a given primary winding is connected to attain the impedance matching between the driving circuit and the ultrasonic transducer, and a voltage limiter arranged in the feedback control loop such that the maximum value of the control voltage is limited in accordance with the probe identification signal.
    • 该装置包括具有手持件的超声波换能器,固定在手持件上的超声波振动元件和与手持件结合的探针,用于传播由超声波振动元件产生的超声波振荡;驱动电路,用于产生用于 超声波振动元件,用于放大驱动信号的压控放大器;阻抗匹配变压器,具有经由开关电路连接到压控放大器的输出的多个初级绕组和连接到超声波振动元件的次级绕组, 识别电路,用于检测连接到手持件的探头以产生探针识别信号;反馈控制回路,用于产生施加到压控放大器的控制电压,用于根据驾驶的驱动电流来控制其放大系数 信号,阻抗检测 用于检测超声换能器的阻抗并控制开关电路,使得给定的初级绕组连接以获得驱动电路和超声换能器之间的阻抗匹配;以及限压器,其布置在反馈控制回路中,使得 根据探头识别信号限制控制电压的最大值。