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    • 32. 发明授权
    • Electric discharge apparatus for controlling the length of a carbon nanotube
    • 用于控制碳纳米管长度的放电装置
    • US07737381B2
    • 2010-06-15
    • US11657615
    • 2007-01-25
    • Hung-Ming TaiNang-Chian ShieTsan-Lin Chen
    • Hung-Ming TaiNang-Chian ShieTsan-Lin Chen
    • B23H7/32
    • G01Q70/16C01B32/16C01B2202/34G01Q70/12Y10S977/856
    • This invention relates to a method and apparatus for controlling the length of a carbon nanotube, in cooperation with a substrate having at least one reference level on a surface of the substrate on which at least one carbon nanotube is formed, comprising at least one positioning platform for mounting and calibrating the substrate; a discharging electrode mounted on one side of the positioning platform to cut the carbon nanotube wherein the position of the discharging electrode can be calibrated with the positioning platform; a piezoelectric actuator for calibrating the position of the discharging electrode or the height of the discharging electrode relative to the substrate reference level; a position sensor for detection of the height of the substrate; and a voltage pulse supplying means for applying a voltage pulse to the discharging electrode to cut the carbon nanotube.
    • 本发明涉及一种用于控制碳纳米管的长度的方法和装置,与在其上形成有至少一个碳纳米管的基底的表面上具有至少一个参考水平的基底配合,包括至少一个定位平台 用于安装和校准基板; 放电电极安装在定位平台的一侧以切割碳纳米管,其中放电电极的位置可以用定位平台校准; 用于校准放电电极的位置或放电电极相对于衬底基准电平的高度的压电致动器; 用于检测基板的高度的位置传感器; 以及电压脉冲提供装置,用于向放电电极施加电压脉冲以切割碳纳米管。
    • 34. 发明授权
    • Electrochemical machining method and apparatus
    • 电化学加工方法及装置
    • US5820744A
    • 1998-10-13
    • US721761
    • 1996-09-30
    • Clifton Vedantus EdwardsFrank P. Simkowski
    • Clifton Vedantus EdwardsFrank P. Simkowski
    • B23H3/02B23H3/00B23H7/32B23H9/14
    • B23H3/02
    • Electrochemical machining (ECM) techniques utilizing real-time parameter monitoring, alarms and feedback control for improved machining of a workpiece are disclosed. The ECM device utilizes one or more cathodes, an electrolyte and a positively charged workpiece to achieve electrolytic action. A number of controlling variables, such as cathode feed rate, electrolyte flow rate and voltage, are balanced in response to measured system parameters. The following parameters are preferably monitored in order to adjust the controlling variables: the drive parameters of feed rate and cathode depth; the pump parameters of flow rate and pressure; and the power components of voltage and current. The flow rate in each of the cathodes, or a corresponding Reynolds number, is preferably utilized to provide an alarm to the operator if a statistically significant change in flow is detected. The dynamic fluid resistance gradient across one or more of the gaps being machined is utilized to approximate the desired shape of the workpiece being machined in real time. The dynamic electrical resistance may be utilized to improve the shape approximation. The approximated shape values are utilized to provide feedback control of one or more of the controlling variables to obtain improved results. The dynamic fluid resistance is the difference between the total measured fluid resistance and the static fluid resistance, as obtained during a calibration procedure.
    • 公开了使用实时参数监测,报警和反馈控制来改进工件加工的电化学加工(ECM)技术。 ECM装置利用一个或多个阴极,电解质和带正电的工件来实现电解作用。 响应于测量的系统参数,许多控制变量,例如阴极进料速率,电解质流速和电压被平衡。 为了调整控制变量,最好监测以下参数:进给速度和阴极深度的驱动参数; 泵参数的流量和压力; 和电压和电流的功率分量。 如果检测到流量的统计上显着的变化,则每个阴极中的流速或相应的雷诺数优选地用于向操作者提供警报。 利用被加工的一个或多个间隙的动态流体阻力梯度来近似实时加工的工件的期望形状。 动态电阻可用于改善形状近似。 近似形状值用于提供一个或多个控制变量的反馈控制,以获得改进的结果。 动态流体阻力是校准过程中获得的总测量流体阻力和静态流体阻力之间的差值。