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热词
    • 5. 发明授权
    • System and method for measuring volume of liquid in a chamber
    • 用于测量腔室中液体体积的系统和方法
    • US06321597B1
    • 2001-11-27
    • US09322477
    • 1999-05-28
    • Jason A. DemersMarc A. Mandro
    • Jason A. DemersMarc A. Mandro
    • G01F2300
    • G01F22/02
    • Methods and systems for measuring the volume of a liquid in a subject chamber, such as the mixing chamber in a system for mixing and delivering drugs, for example. A volume of a control gas in communication with the subject chamber is isolated, such that the total volume of the control gas and the liquid is held constant, and the initial pressure of the control gas is measured. Then, a known volume of liquid is moved into or out of the subject chamber. This known volume may be exchanged between the subject chamber and a measurement chamber, in order to determine this volume. The final pressure of the control gas is also measured after the reference volume has been removed from or added to the chamber and while the volume of control gas remains otherwise isolated. The volume of liquid in the chamber may then be measured based on (a) the initial pressure, (b) the final pressure, (c) the reference volume and (d) the volume of gas in the subject chamber when the subject chamber is empty of liquid.
    • 用于测量本体室中的液体的体积的方法和系统,例如用于混合和递送药物的系统中的混合室。 与被检体室连通的控制气体的体积被隔离,使得控制气体和液体的总体积保持恒定,并且测量控制气体的初始压力。 然后,将已知体积的液体移入或移出对象室。 这个已知体积可以在本体室和测量室之间进行交换,以确定该体积。 控制气体的最终压力也是在将参考体积从室中除去或加入到室中之后测量的,而控制气体的体积保持另外分离。 然后可以基于(a)初始压力,(b)最终压力,(c)参考体积和(d)当主体室是当前室时气体的体积来测量腔室中的液体体积 空的液体。