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    • 6. 发明授权
    • Liquid flow rate controller
    • 液体流量控制器
    • US06491659B1
    • 2002-12-10
    • US09517816
    • 2000-03-02
    • Isshin Miyamoto
    • Isshin Miyamoto
    • A61M100
    • A61M5/1689A61M5/16804A61M5/16813A61M39/28A61M39/281A61M2205/14A61M2205/3306
    • A liquid flow rate detector and controller having a microprocessor that senses the rate of drops falling in a monitoring balloon on a fluid tube. A light emitter/detector diode pair detects drops as they fall in the balloon, which are timed by the microprocessor. The device has first and second switches manufactured in a single small unit made of thin laminates. Each switch comprises an electrode and a contact point, mutually facing across a gap in the layers. The lamina on at least one side of each switch is elastic. External force flexes the elastic layer, causing it to bend across the gap, causing the electrode and the contact point to touch. A fluid tube is inserted in a narrow channel between the first switch and a movable wedge. A stepper motor under control of the microprocessor moves the wedge to press the fluid tube against the first switch until the contacts close. This indicates that the fluid tube is completely flattened and closed. The microprocessor then retracts the wedge a predetermined distance from the closed point and monitors the rate of drops falling in the drip balloon. The movement of the wedge is precisely controlled by the microprocessor to achieve a desired drop rate. The second switch senses the presence of a fluid tube in the narrow channel to allow initialization of the process.
    • 一种液体流量检测器和控制器,其具有微处理器,该微处理器感测滴落在流体管上的监测气球中的液滴速率。 光发射器/检测器二极管对在它们落入气球时检测到下降,这些微处理器定时。 该装置具有由薄层压板制成的单个小单元中制造的第一和第二开关。 每个开关包括电极和接触点,其相互面对跨越层中的间隙。 每个开关的至少一侧的薄片是弹性的。 外力使弹性层弯曲,导致其跨越间隙弯曲,导致电极和接触点接触。 流体管插入在第一开关和可移动楔之间的狭窄通道中。 在微处理器控制下的步进电机移动楔形件以将流体管压靠第一开关直到触点闭合。 这表明流体管完全变平且闭合。 然后微处理器将楔形件从闭合点缩回预定距离,并监测滴落在气球中的液滴速率。 楔形件的移动由微处理器精确地控制以实现所需的下降率。 第二开关感测在狭窄通道中流体管的存在以允许该过程的初始化。