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公开(公告)号：US06296450B1
公开(公告)日：2001-10-02
申请号：US09390269
申请日：1999-09-03
IPC分类号： F04B4900
CPC分类号： F04B49/06 , F04B49/12 , F04B2205/09
摘要： Systems and related methods pump fluid through a pump having a stroke volume. The systems and methods employ gravimetric control measures to monitor fluid flow through the pump. An actuator interacts with the pump during a stroke interval (TStroke) to pump fluid through the pump. The systems and methods couple a receptacle to the pump, to either dispense fluid into the pump or to receive fluid from the pump. The systems and methods detect changes in weight of the receptacle over a sample time period. The systems and methods achieve a desired flow rate (QDesired) by deriving an actual flow rate (QActual) by sensing changes in weight of the receptacle over the sample time period, taking into account the density of the fluid, and adjusting the stroke interval based upon QActual so that QDesired is achieved.
摘要翻译： 系统和相关方法通过具有行程体积的泵来泵送流体。 系统和方法采用重力控制措施来监测通过泵的流体流量。 执行器在行程间隔（TStroke）期间与泵相互作用以泵送流体通过泵。 系统和方法将容器连接到泵，以将流体分配到泵中或从泵接收流体。 系统和方法在一个采样时间段内检测容器的重量变化。 系统和方法通过在考虑到流体的密度的基础上感测容器在采样时间段内的重量变化并通过调节基于行程间隔的方式获得实际流量（QActual）来实现期望的流量（QDesire） 在QActual上实现QDesired。
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公开(公告)号：US5731581A
公开(公告)日：1998-03-24
申请号：US403161
申请日：1995-03-13
CPC分类号： G01N21/3504 , G01N21/314 , G01N2201/1293
摘要： The gas sample identification apparatus transmits at least one beam of light of predefined frequency band through a gas sample present in a gas sampling chamber. The presence and concentration of various agents in the gas sample are determined by a linear variable filter that selectively passes the light beam transmitted through the gas sample chamber to an array of detectors. The detectors are positioned to receive only a narrow passband component of the light beam. The output signals from the array of detectors is processed by a multivariate statistical processor to accurately identify both the presence and concentration of one or more agents contained in the gas sample.
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公开(公告)号：US5920069A
公开(公告)日：1999-07-06
申请号：US946205
申请日：1997-10-07
CPC分类号： G01N21/3504 , G01N21/314 , G01N2201/1293
摘要： The gas sample identification apparatus transmits at least one beam of light of predefined frequency band through a gas sample present in a gas sampling chamber. The presence and concentration of various agents in the gas sample are determined by a linear variable filter that selectively passes the light beam transmitted through the gas sample chamber to an array of detectors. The detectors are positioned to receive only a narrow passband component of the light beam. The output signals from the array of detectors is processed by a multivariate statistical processor to accurately identify both the presence and concentration of one or more agents contained in the gas sample.
摘要翻译： 气体样品识别装置通过存在于气体取样室中的气体样品发送预定频带的至少一束光。 气体样品中各种试剂的存在和浓度由线性可变滤波器确定，该线性可变滤波器选择性地将透过气体样品室的光束通过检测器阵列。 检测器被定位成仅接收光束的窄通带分量。 来自检测器阵列的输出信号由多变量统计处理器处理，以准确地识别包含在气体样品中的一种或多种试剂的存在和浓度。
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