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    MULTI-FUNCTIONAL PIEZO ACTUATED FLOW CONTROLLER
    1.
    发明公开
    MULTI-FUNCTIONAL PIEZO ACTUATED FLOW CONTROLLER 审中-公开

    公开(公告)号：EP3175219A4

    公开(公告)日：2018-01-24

    申请号：EP15826804

    申请日：2015-07-27

    Applicant: LI-COR INC

    Inventor： ECKLES ROBERT D ,  JOHNSON MARK A ,  ANDERSON TYLER

    IPC: G01N7/00 ,  G01N1/20 ,  G01N1/22 ,  G01N33/00

    CPC classification number: G01N33/0031 ,  G01N33/004 ,  G01N33/0098 ,  G01N2001/2229 ,  G01N2001/2241

    Abstract: Multi-functional piezo-actuated flow control systems and methods for use in gas exchange analysis systems such as photosynthesis measurement systems. A fluid valve assembly module includes a housing structure including a plurality of ports and a plurality of fluid passageways interconnecting the ports, and a plurality of piezo-actuated valves in fluid communication with the fluid passageways, each valve including a piezo element that controls flow along a passageway, wherein the passageways and valves are arranged within the housing structure so as to define a fluid control module, which includes a flow swapping component, a flow splitting component and a flow pressurization component. The flow swapping component has first and second inlets and first and second output ports and is configured to receive a first fluid flow at the first inlet and a second fluid flow at the second inlet and in a first operational mode to direct the first fluid flow to the first output port and the second fluid flow to the second output port, and in a second operational mode to direct the first fluid flow to the second output port and the second fluid flow to the first output port. The flow splitting component has an input port, a third output port and a first outlet and is configured to receive an input fluid flow at the input port and to control an amount of the input fluid flow provided to the third output port and to the first outlet in a continuously adjustable manner, wherein the first outlet is fluidly connected to the first inlet of the flow swapping component and the third output port is adapted to be fluidly coupled with an external reservoir. The flow pressurization component has an entry port in fluid communication with a second outlet and is configured to receive a third fluid flow at the entry port and to control the pressure of the third fluid flow at the second outlet, wherein the second outlet is fluidly connected to the second inlet of the flow swapping component and the entry port is adapted to be fluidly coupled with the external reservoir.

    GAS EXCHANGE SYSTEM FLOW CONFIGURATION
    4.
    发明申请
    GAS EXCHANGE SYSTEM FLOW CONFIGURATION 审中-公开
    气体交换系统流量配置

    公开(公告)号：WO2012040439A3

    公开(公告)日：2012-06-14

    申请号：PCT/US2011052724

    申请日：2011-09-22

    Applicant: LI COR INC ,  JOHNSON MARK A ,  PARR ANDREW S ,  ECKLES ROBERT D

    Inventor： JOHNSON MARK A ,  PARR ANDREW S ,  ECKLES ROBERT D

    IPC: G01N21/37 ,  G01N33/00 ,  G01N33/24

    CPC classification number: G01N33/0009 ,  B33Y70/00 ,  B33Y80/00 ,  G01N21/05 ,  G01N21/3504 ,  G01N33/004 ,  G01N33/0098 ,  G01N2021/8466

    Abstract: System flow path designs that minimize the impact of gas diffusion sources and sinks. By reducing the magnitude of parasitic sources and sinks, lower rates of photosynthesis and transpiration can be more accurately measured, e.g., without the need for extensive empirical compensation. According to one aspect, a gas exchange analysis system includes a sample chamber defining a measurement volume for analysis of a sample, the sample chamber having an inlet and an outlet, and a flow splitting mechanism located proximal to the sample chamber, the mechanism configured to split a gas flow received at an input port from a remote source to a first output port and to a second output port, wherein the first output port is coupled with the inlet of the sample chamber. The internal surface(s) of the chamber defining the measurement volume can be metal plated. The system also can include a source of gas coupled with the inlet of the sample chamber and a gas analyzer coupled with the outlet of the sample chamber and configured to measure a concentration of one or more gases exiting the chamber, whereby metal plated internal surface(s) of the chamber can reduce sorption of the one or more gases within the chamber, and a second gas analyzer coupled with the second output port of the flow splitting mechanism and configured to measure a concentration of the one or more gases. Advantageously, gas diffusion sources and sinks are reduced due to the proximity of the flow splitting mechanism with the sample chamber and gas analyzers as well as the metal plating.

    Abstract translation: 系统流路设计，尽量减少气体扩散源和水槽的影响。 通过减少寄生源和汇的幅度，可以更准确地测量较低的光合作用和蒸腾速率，例如，不需要广泛的经验补偿。 根据一个方面，一种气体交换分析系统包括：样本室，其限定用于分析样品的测量体积，所述样品室具有入口和出口;以及位于所述样品室附近的分流机构，所述机构被配置为 将从输入端口接收的气流从远程源分解到第一输出端口和第二输出端口，其中第一输出端口与样品室的入口耦合。 限定测量体积的室的内表面可以是金属镀覆的。 该系统还可以包括与样品室的入口耦合的气体源和与样品室的出口耦合的气体分析器，并且被配置为测量离开室的一种或多种气体的浓度，由此金属镀覆的内表面 s）可以减少腔室内的一种或多种气体的吸附，以及与分流机构的第二输出端口耦合并被配置成测量一种或多种气体的浓度的第二气体分析器。 有利的是，由于流动分离机构与样品室和气体分析仪以及金属镀层的接近，气体扩散源和水槽被减少。

    GAS EXCHANGE SYSTEM FLOW CONFIGURATION
    5.
    发明申请
    GAS EXCHANGE SYSTEM FLOW CONFIGURATION 审中-公开
    气体交换系统流量配置

    公开(公告)号：WO2012040504A3

    公开(公告)日：2012-06-07

    申请号：PCT/US2011052821

    申请日：2011-09-22

    Applicant: LI COR INC ,  JOHNSON MARK A ,  ECKLES ROBERT D ,  MCDERMITT DAYLE K

    Inventor： JOHNSON MARK A ,  ECKLES ROBERT D ,  MCDERMITT DAYLE K

    IPC: G01N21/37 ,  G01N1/22

    CPC classification number: G01N33/0031 ,  A01G7/00 ,  G01F1/05 ,  G01N21/3504 ,  G01N33/004 ,  G01N33/0098 ,  G01N2021/3513

    Abstract: Active compensation designs to offset the impact of gas diffusion sources and sinks in a photosynthesis and transpiration measurement system are disclosed. A sensor head for use in a gas exchange analysis system includes an active, piezoelectric flow splitting device for splitting a flow between a sample chamber and bypass pathway. The active flow splitting device is controlled by feedback from a downstream flow meter. A continuous measurement system for rapidly and accurately surveying large numbers of samples is described.

    Abstract translation: 公开了用于抵消气体扩散源和水槽在光合作用和蒸腾测量系统中的影响的主动补偿设计。 用于气体交换分析系统的传感器头包括用于分离样品室和旁路通路之间的流动的主动压电流分流装置。 主动分流装置由来自下游流量计的反馈控制。 描述了用于快速和准确地测量大量样品的连续测量系统。

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