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公开(公告)号：US11719679B2
公开(公告)日：2023-08-08
申请号：US17198879
申请日：2021-03-11
申请人： Li-Cor, Inc.
IPC分类号： G01N33/00
CPC分类号： G01N33/0098
摘要： Gas exchange analysis methods and systems utilize a water vapor buffering component including a material configured to buffer water vapor in a flow of a gas, whereby fluctuations in the water vapor content in the flow of the gas are slowed for components downstream from the water vapor buffering component. Components downstream of the water vapor buffering component may include: a first water vapor sensor configured to receive the flow of the gas from the water vapor buffering component and configured to measure a first concentration of water vapor in the gas; a sample chamber configured to receive the gas exiting the water vapor buffering component or the first water vapor sensor and to hold a sample capable of adding or removing water vapor from the gas; and a second water vapor sensor configured to measure a second concentration of water vapor in the gas exiting the sample chamber.
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公开(公告)号：US09482653B2
公开(公告)日：2016-11-01
申请号：US14542926
申请日：2014-11-17
申请人： LI-COR, Inc.
IPC分类号： G01N33/00 , A01G7/00 , G01F1/05 , G01N21/3504
CPC分类号： G01N33/0031 , A01G7/00 , G01F1/05 , G01N21/3504 , G01N33/004 , G01N33/0098 , G01N2021/3513
摘要： 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.
摘要翻译： 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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公开(公告)号：US20210293768A1
公开(公告)日：2021-09-23
申请号：US17198879
申请日：2021-03-11
申请人： Li-Cor, Inc.
IPC分类号： G01N33/00
摘要： Gas exchange analysis methods and systems utilize a water vapor buffering component including a material configured to buffer water vapor in a flow of a gas, whereby fluctuations in the water vapor content in the flow of the gas are slowed for components downstream from the water vapor buffering component. Components downstream of the water vapor buffering component may include: a first water vapor sensor configured to receive the flow of the gas from the water vapor buffering component and configured to measure a first concentration of water vapor in the gas; a sample chamber configured to receive the gas exiting the water vapor buffering component or the first water vapor sensor and to hold a sample capable of adding or removing water vapor from the gas; and a second water vapor sensor configured to measure a second concentration of water vapor in the gas exiting the sample chamber.
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