Apparatus and method for rotating an optical element using a moving coil
in a constant magnetic field
    2.
    发明授权
    Apparatus and method for rotating an optical element using a moving coil in a constant magnetic field 失效
    在恒定磁场中使用运动线圈旋转光学元件的装置和方法

    公开(公告)号:US5488240A

    公开(公告)日:1996-01-30

    申请号:US172899

    申请日:1993-12-27

    CPC分类号: G02B7/1828 G01J3/18 G02B7/005

    摘要: An apparatus and method for rotating an optical element, such as a diffraction grating or mirror, utilizes a moving coil actuator and an optical encoder to provide precise element position control. The moving coil actuator, which is coupled to the optical element, is comprised of a coil immersed in a magnetic field created by a pair of magnets. Current flowing in the coil windings causes the coil, and ultimately the optical element, to rotate. An optical encoder monitors the rotation of the element and provides rotation signals representative of the instantaneous element position to an actuator control circuit. The actuator control circuit phase shifts the rotation signals and compares the phase shifted rotation signals to a desired reference signal to generate position and velocity error signals. In a track follow mode, the position error signal is applied to the moving coil actuator via a loop compensator. When the apparatus is operating in an optimal seek mode, a trajectory generator receives the velocity error signals and generates an optimum velocity signal based on a preprogrammed velocity curve. The optimum velocity signal is then applied to the moving coil actuator via the loop compensator.

    摘要翻译: 用于旋转光学元件(例如衍射光栅或反射镜)的装置和方法利用移动线圈致动器和光学编码器来提供精确的元件位置控制。 耦合到光学元件的移动线圈致动器包括浸入由一对磁体产生的磁场中的线圈。 在线圈绕组中流动的电流使得线圈和最终的光学元件旋转。 光学编码器监测元件的旋转并且向致动器控制电路提供表示瞬时元件位置的旋转信号。 致动器控制电路使旋转信号相移,并将相移的旋转信号与期望的参考信号进行比较,以产生位置和速度误差信号。 在跟踪跟踪模式中,位置误差信号通过环路补偿器施加到动圈线圈致动器。 当装置以最佳搜索模式操作时,轨迹发生器接收速度误差信号,并且基于预编程的速度曲线产生最佳速度信号。 然后通过环路补偿器将最佳速度信号施加到运动线圈致动器。

    Dual arm robot
    3.
    外观设计
    Dual arm robot 有权
    双臂机器人

    公开(公告)号:USD646703S1

    公开(公告)日:2011-10-11

    申请号:US29378220

    申请日:2010-11-01

    申请人: Kenny Wong

    设计人: Kenny Wong

    Dual arm robot
    5.
    外观设计
    Dual arm robot 有权
    双臂机器人

    公开(公告)号:USD655324S1

    公开(公告)日:2012-03-06

    申请号:US29378225

    申请日:2010-11-01

    申请人: Kenny Wong

    设计人: Kenny Wong

    Viscous oil recovery method
    6.
    发明授权
    Viscous oil recovery method 失效
    粘稠油回收方法

    公开(公告)号:US4324291A

    公开(公告)日:1982-04-13

    申请号:US144732

    申请日:1980-04-28

    IPC分类号: E21B43/18 E21B43/24 E21B47/06

    CPC分类号: E21B43/18 E21B43/24

    摘要: Disclosed is an improved viscous oil recovery method employing the injection of a thermal recovery fluid which may be steam or a mixture of steam and additives, and cycles of pressurization and drawdown. First the thermal recovery fluid is injected and production is restricted in order to increase the pressure in the reservoir. Injection is then terminated or decreased and production is increased in order to effect a pressure drawdown in the reservoir. Thereafter the production rate is decreased or production wells are shut in completely and non-condensable gas is injected to raise the pressure in the reservoir to a value which is from 50 to 90 percent of the final target pressure, after which the thermal recovery fluid is again injected into the formation to rebuild reservoir pressure with restricted production. Finally, production rate is increased and thermal recovery fluid injection is reduced or terminated in order to accomplish another reservoir drawdown cycle. Additional cycles of partial repressuring with non-condensable gas followed by steam injection followed by pressure drawdown production cycles may be employed.

    摘要翻译: 公开了一种改进的粘性油回收方法,其使用可以是蒸汽或蒸汽和添加剂的混合物的热回收流体的注入,以及加压和抽出的循环。 首先,热回收流体被注入并且生产被限制以增加储存器中的压力。 然后终止或减少注射,并且增加生产以实现储存器中的压力下降。 此后,生产率降低或生产井完全关闭,注入不可冷凝气体以将储层中的压力提高到最终目标压力的50%至90%的值,之后热回收流体为 再次注入地层,以有限的生产重建水库压力。 最后,提高生产率,减少或终止热回收流体注入,从而实现另一个储层下降循环。 可以采用用不可冷凝气体进行部分压制,然后进行蒸汽喷射,然后进行压力下降生产循环的附加循环。