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    • 2. 发明授权
    • Stepping motor control procedure for achieving variable rate,
quasi-continuous fluid infusion
    • 步进电机控制程序实现可变速率,准连续流体输注
    • US4474309A
    • 1984-10-02
    • US314038
    • 1981-10-22
    • Edward G. Solomon
    • Edward G. Solomon
    • G05D7/06A61M1/00A61M5/142A61M5/172F04B49/20A61M5/14
    • A61M5/172A61M5/14224F04B49/20A61M2205/12
    • A control procedure for governing the incremental step operation of a pump stepping motor (74) employed in conjunction with a parenteral fluid metering device (2) is disclosed. The control procedure enables fluid to be pumped from the metering device (2) in non-pulsatile, essentially continuous fashion by suitably adjusting the stepping motor speed to compensate for the interruption of fluid flow which occurs during the refill phase (P.sub.R) of each pumping cycle (C). Adjustment of the stepping motor speed also compensates for non-linearities otherwise introduced into the fluid flow as a result of the camming mechanism (76,78) utilized to convert rotary stepping motor movement into rectilinear pumping movement. Operating power for the stepping motor is conserved by drawing relatively large amounts of current through the stepping motor (74) only at the outset of each incremental step while drawing relatively smaller amounts of current through the stepping motor (74) during the remaining interval between incremental steps.
    • 公开了一种用于控制与肠胃外流体计量装置(2)结合使用的泵步进马达(74)的增量步进操作的控制程序。 控制程序使流体能够通过适当地调节步进电机速度,以非脉动,基本上连续的方式从计量装置(2)泵送,以补偿在每个泵送的再填充阶段(PR)期间发生的流体流动的中断 周期(C)。 由于用于将旋转步进电动机运动转换为直线泵送运动的凸轮机构(76,78),步进电机速度的调节还补偿了另外被引入到流体流中的非线性。 只有在每个增量步长开始时,通过步进电机(74)的相对较大量的电流才能保持步进电机的工作功率,同时在增量之间的剩余时间间隔内通过步进电机(74)吸取相对较小量的电流 脚步。
    • 6. 发明授权
    • Beam hardening filter for x-ray source
    • 用于x射线源的光束硬化过滤器
    • US6157703A
    • 2000-12-05
    • US167639
    • 1998-10-06
    • Edward G. SolomonGiovanni Pastrone
    • Edward G. SolomonGiovanni Pastrone
    • G21K1/10G21K3/00
    • G21K1/10
    • An x-ray beam hardening filter is disclosed. The x-ray beam hardening filter comprises a support member and a beam hardening sheet, the beam hardening sheet having a multidimensional array of regularly spaced apertures. The apertures are configured to have an x-ray transmissive quality. An actuator, engaging the support member, is capable of moving the multidimensional array of apertures into or out of a path of an x-ray beam, thereby selectively introducing varying levels of x-ray energy filtration. In one embodiment, multiple layers of beam hardening sheets are added to the x-ray beam hardening filter to create additional levels of x-ray energy filtration. Advantages of the x-ray beam hardening filter include the relatively small distance the x-ray beam hardening filter must move in order to absorb the incident x-ray beam, the ability to introduce varying levels of x-ray filtration, and the compact structure of the x-ray beam hardening filter.
    • 公开了一种X射线束硬化过滤器。 X射线束硬化过滤器包括支撑构件和束固化片,束固化片具有规则间隔孔的多维阵列。 孔被构造成具有x射线透射质量。 接合支撑构件的致动器能够将多维阵列的孔移入或移出X射线束的路径,从而选择性地引入不同程度的x射线能量过滤。 在一个实施例中,将多层梁硬化片材加入到X射线束硬化过滤器中以产生额外的X射线能量过滤水平。 x射线束硬化过滤器的优点包括X射线束硬化过滤器必须移动以相对较小的距离以吸收入射的X射线束,引入不同程度的x射线过滤的能力以及紧凑的结构 的X射线束硬化过滤器。