Electokinetic high pressure hydraulic system
    61.
    发明授权
    Electokinetic high pressure hydraulic system 失效
    电动高压液压系统

    公开(公告)号:US6013164A

    公开(公告)日:2000-01-11

    申请号:US882725

    申请日:1997-06-25

    摘要: A compact high pressure hydraulic system having no moving parts for converting electric potential to hydraulic force and for manipulating fluids. Electro-osmotic flow is used to provide a valve and means to compress a fluid or gas in a capillary-based system. By electro-osmotically moving an electrolyte between a first position opening communication between a fluid inlet and outlet and a second position closing communication between the fluid inlet and outlet the system can be configured as a valve. The system can also be used to generate forces as large as 2500 psi that can be used to compress a fluid, either a liquid or a gas.

    摘要翻译: 一种紧凑型高压液压系统,其没有用于将电势转换为液压力并用于操纵流体的移动部件。 电渗流用于提供阀和在基于毛细管的系统中压缩流体或气体的装置。 通过在流体入口和出口之间的第一位置开口连通之间电渗移动电解质和闭合流体入口和出口之间的连通的第二位置,系统可被配置为阀。 该系统还可用于产生大至2500psi的力,可用于压缩液体或气体的流体。

    Pneumatic control system
    69.
    发明授权
    Pneumatic control system 失效
    气动控制系统

    公开(公告)号:US5642271A

    公开(公告)日:1997-06-24

    申请号:US521702

    申请日:1995-08-31

    CPC分类号: G05B11/58 G01N30/28

    摘要: An improved pneumatic control system suitable for use in providing servo control of one or more active devices in an analytical instrument includes a series pass element that effects partial regulation of an unregulated voltage to remove any high frequency supply voltage variations (including but not limited to a ripple component), but need not regulate the low frequency voltage variations, the effects of which are compensated by a loop gain compensation scheme operable in a servo control loop. A digital signal processor employed in the servo control loop uses a voltage sense signal representative of the regulated supply line voltage to generate a correcting term for use in a proportional integral derivative (PID) control algorithm operating in control loop firmware. The correcting term causes an inverse proportional change in the control loop gain. The duty cycle of the drive signal provided to the active device is accordingly modulated, when necessary, to account for changes indicated by the voltage sense signal. The power in the drive signal is therefore made independent of variations in the regulated supply line voltage. As a result, the active device is operated with greater efficiency and accuracy.

    摘要翻译: 适用于在分析仪器中提供一个或多个有源器件的伺服控制的改进的气动控制系统包括串联通过元件,其实现对未调节电压的部分调节以去除任何高频电源电压变化(包括但不限于 纹波分量),但不需要调节低频电压变化,其影响由在伺服控制环路中可操作的环路增益补偿方案来补偿。 在伺服控制回路中使用的数字信号处理器使用表示经调节的电源线电压的电压检测信号来产生用于在控制回路固件中操作的比例积分微分(PID)控制算法中的校正项。 校正项导致控制环增益的反比例变化。 因此,必要时调制提供给有源器件的驱动信号的占空比以考虑由电压检测信号指示的变化。 因此,驱动信号中的功率与调节的电源线电压的变化无关。 结果,有源器件以更高的效率和精度工作。