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    • 68. 发明授权
    • Sensor for detecting bubbles in a liquid flowing through a flow path
    • 用于检测流过流路的液体中的气泡的传感器
    • US08794081B2
    • 2014-08-05
    • US13203801
    • 2010-03-03
    • Jaap Roger HaartsenRonald Dekker
    • Jaap Roger HaartsenRonald Dekker
    • G01F13/00G01F1/68
    • G01F1/74A61M5/16886A61M5/365A61M2205/3368G01F1/688
    • A sensor for detecting bubbles in gas phase present in a liquid flowing through a flow path. The sensor can include a heating element for heating the liquid, which can be provided with a predetermined level of power at least during detecting, and a transducer arrangement arranged for generating a measurement signal indicative for the temperature of the heating element. The sensor furthermore can include a comparator arrangement for comparing a measurement value of the measurement signal with a predetermined threshold level, which can correspond to a reference temperature attainable by the heating element in response to the predetermined level of power and a minimum velocity attainable by the liquid in the flow path. Based on the latter comparison, the comparator arrangement can generate an output signal indicative for a possible presence of bubbles in gas phase.
    • 用于检测存在于流过流路的液体中的气相中的气泡的传感器。 传感器可以包括用于加热液体的加热元件,其至少在检测期间可以被提供预定水平的功率;以及换能器布置,其布置成产生指示加热元件的温度的测量信号。 此外,传感器还可以包括比较器装置,用于将测量信号的测量值与预定阈值电平进行比较,该预定阈值电平可以对应于由加热元件响应于预定功率水平而可达到的参考温度,以及可由 流动路径中的液体。 基于后一比较,比较器装置可以产生指示在气相中可能存在气泡的输出信号。