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    • 6. 发明授权
    • Gas extraction device for extracting gas from a microfluidics system
    • 用于从微流体系统中提取气体的气体提取装置
    • US06398850B1
    • 2002-06-04
    • US09892203
    • 2001-06-25
    • Leslie A. FieldDavid K. DonaldPhillip W. BarthJonathan ServaitesStorrs T. Hoen
    • Leslie A. FieldDavid K. DonaldPhillip W. BarthJonathan ServaitesStorrs T. Hoen
    • B41J219
    • B41J2/19
    • A thermally-activated gas extraction device that comprises a bubble capture chamber, an exhaust manifold, a tapered extraction chamber and an extraction heater associated with the tapered extraction chamber. The tapered extraction chamber extends from the bubble capture chamber towards the exhaust manifold and has a cross-sectional area that increases towards the exhaust manifold. A gas removal method in which the gas extraction device is provided, a bubble of gas is accumulated in the bubble capture chamber, a portion of the liquid in the tapered extraction chamber heated to nucleate a bubble of vapor, and the bubble of vapor is heated to explosively expand the bubble of vapor into contact with the walls of the tapered extraction chamber and into contact with the bubble of gas to form a composite bubble. Contact with the walls of the tapered extraction moves the composite bubble towards the exhaust manifold. Finally, heating of the composite bubble is discontinued to condense the vapor in the composite bubble.
    • 一种热活化气体提取装置,其包括气泡捕获室,排气歧管,锥形抽出室和与锥形抽出室相关联的抽出加热器。 锥形抽出室从气泡捕获室朝向排气歧管延伸并且具有朝向排气歧管增加的横截面面积。 一种气体去除方法,其中提供气体提取装置,气体的气泡积聚在气泡捕获室中,锥形抽出室中的一部分液体被加热以使蒸汽的气泡成核,并且蒸气的气泡被加热 以将爆炸性地膨胀蒸汽气泡与锥形抽出室的壁接触并与气泡接触以形成复合气泡。 与锥形提取物的壁接触将复合气泡朝向排气歧管移动。 最后,中止复合气泡的加热以冷凝复合气泡中的蒸汽。
    • 7. 发明授权
    • Gas extraction device for extracting gas from a microfluidics system
    • 用于从微流体系统中提取气体的气体提取装置
    • US06299673B1
    • 2001-10-09
    • US09221026
    • 1998-12-23
    • Leslie A. FieldDavid K. DonaldPhillip W. BarthJonathan ServaitesStorrs T. HoenJonah A. Harley
    • Leslie A. FieldDavid K. DonaldPhillip W. BarthJonathan ServaitesStorrs T. HoenJonah A. Harley
    • B41J219
    • B41J2/19
    • A thermally-activated gas extraction device that comprises a bubble capture chamber, an exhaust manifold, a tapered extraction chamber and an extraction heater associated with the tapered extraction chamber. The tapered extraction chamber extends from the bubble capture chamber towards the exhaust manifold and has a cross-sectional area that increases towards the exhaust manifold. A gas removal method in which the gas extraction device is provided, a bubble of gas is accumulated in the bubble capture chamber, a portion of the liquid in the tapered extraction chamber heated to nucleate a bubble of vapor, and the bubble of vapor is heated to explosively expand the bubble of vapor into contact with the walls of the tapered extraction chamber and into contact with the bubble of gas to form a composite bubble. Contact with the walls of the tapered extraction moves the composite bubble towards the exhaust manifold. Finally, heating of the composite bubble is discontinued to condense the vapor in the composite bubble.
    • 一种热活化气体提取装置,其包括气泡捕获室,排气歧管,锥形抽出室和与锥形抽出室相关联的抽出加热器。 锥形抽出室从气泡捕获室朝向排气歧管延伸并且具有朝向排气歧管增加的横截面面积。 一种气体去除方法,其中提供气体提取装置,气体的气泡积聚在气泡捕获室中,锥形抽出室中的一部分液体被加热以使蒸汽的气泡成核,并且蒸气的气泡被加热 以将爆炸性地膨胀蒸汽气泡与锥形抽出室的壁接触并与气泡接触以形成复合气泡。 与锥形提取物的壁接触将复合气泡朝向排气歧管移动。 最后,中止复合气泡的加热以冷凝复合气泡中的蒸汽。
    • 8. 发明授权
    • High output capacitative gas/liquid detector
    • 高输出电容气体/液体检测器
    • US06212956B1
    • 2001-04-10
    • US09221636
    • 1998-12-23
    • David K. DonaldLeslie A. FieldPhillip W. BarthStorrs T. Hoen
    • David K. DonaldLeslie A. FieldPhillip W. BarthStorrs T. Hoen
    • G01L912
    • G01V3/088G01N27/221
    • A gas or liquid detector that includes a capacitative sensor and a capacitance detector. The capacitative sensor includes a first electrode and a second electrode separated from one another, and additionally includes Debye elements extant in the liquid adjacent such portions of the electrodes that are in contact with the liquid. The Debye elements each include a Debye capacitor with an associated shunt conductor. The shunt conductor has an exponentially-increasing conductance versus voltage characteristic. The Debye element adjacent the first electrode and the Debye element adjacent the second electrode are connected in series by conduction through the liquid. The Debye element adjacent at least the first electrode has a substantially greater capacitance than the capacitance between the electrodes absent the Debye elements. The capacitance detector is connected to the capacitative sensor and measures the capacitance of the capacitative sensor by applying an alternating voltage between the electrodes. The alternating voltage has a voltage amplitude less than the voltage amplitude at which the Debye element extant adjacent at least the first electrode ceases to be predominantly capacitative. By measuring the capacitance of the capacitative sensor using an alternating voltage having a voltage amplitude less than the voltage amplitude at which the Debye element ceases to be predominantly capacitative, the capacitances measured are one or more orders of magnitude greater than the capacitances conventionally measured between electrodes in contact with a liquid.
    • 包括电容传感器和电容检测器的气体或液体检测器。 电容传感器包括彼此分离的第一电极和第二电极,并且还包括与液体相邻的与电极接触的这些部分中的液体中存在的德拜元件。 德拜元件各自包括具有相关联的分流导体的德拜电容器。 分流导体具有指数增加的电导与电压特性。 邻近第一电极的德拜元件和与第二电极相邻的德拜元件通过液体导通而串联连接。 至少第一电极相邻的德拜元件具有比不存在德拜元件的电极之间的电容大得多的电容。 电容检测器连接到电容传感器,并通过在电极之间施加交流电压来测量电容传感器的电容。 交变电压的电压幅度小于与至少第一电极相邻的德拜元件不再主要是电容的电压幅度。 通过使用具有小于德拜元件停止主要是电容的电压幅度的电压幅度的交流电压来测量电容性传感器的电容,所测量的电容比电极之间常规测量的电容大一个或多个数量级 与液体接触。
    • 9. 发明授权
    • Bubble valve and bubble valve-based pressure regulator
    • 气泡阀和气泡阀为基础的压力调节器
    • US06062681A
    • 2000-05-16
    • US114978
    • 1998-07-14
    • Leslie A. FieldStefano SchiaffinoPhillip W. BarthStorrs T. HoenNaoto A. KawamuraDavid K. DonaldChanning R. RobertsonJonathan D. Servaites
    • Leslie A. FieldStefano SchiaffinoPhillip W. BarthStorrs T. HoenNaoto A. KawamuraDavid K. DonaldChanning R. RobertsonJonathan D. Servaites
    • B41J2/175B41J2/05
    • B41J2/17596B41J2/19Y10S366/03
    • A bubble valve that comprises a liquid delivery channel and a localized heating arrangement. The liquid delivery channel includes an upstream portion and a constriction downstream of the upstream portion. The constriction has a smaller cross-sectional area than the upstream portion. The localized heating arrangement is located in the liquid delivery channel and generates heat to nucleate and enlarge a bubble in the liquid. The constriction is shaped to form a seal with the bubble. The localized heating arrangement additionally generates heat to move the bubble relative to the constriction to control the flow of the liquid. A pressure regulator that comprises a liquid delivery channel connected to a liquid outlet, a sensor located adjacent the liquid outlet, a controller that operates in response to the sensor and a localized heating arrangement. The liquid delivery channel includes an upstream portion, and a constriction located between the upstream portion and the liquid outlet. The constriction has a smaller cross-sectional area than the upstream portion. The localized heating arrangement is located in the liquid delivery channel and generates heat in response to the controller to nucleate and enlarge a bubble in the liquid. The constriction is shaped to form a seal with the bubble. The localized heating arrangement additionally generates heat to move the bubble relative to the constriction to control the flow of the liquid to the liquid outlet.
    • 气泡阀,其包括液体输送通道和局部加热装置。 液体输送通道包括上游部分的下游部分和收缩部分。 缩颈具有比上游部分更小的横截面面积。 局部加热装置位于液体输送通道中并产生热量以成核并扩大液体中的气泡。 缩颈被成形为与气泡形成密封。 局部加热装置另外产生热量以相对于收缩部移动气泡以控制液体的流动。 一种压力调节器,包括连接到液体出口的液体输送通道,位于液体出口附近的传感器,响应于传感器操作的控制器和局部加热装置。 液体输送通道包括上游部分和位于上游部分和液体出口之间的收缩部。 缩颈具有比上游部分更小的横截面面积。 局部加热装置位于液体输送通道中,响应于控制器产生热量以成核并扩大液体中的气泡。 缩颈被成形为与气泡形成密封。 局部加热装置另外产生热量以相对于收缩部移动气泡以控制液体流到液体出口的流动。
    • 10. 发明授权
    • Capillary fluid switch with asymmetric bubble chamber
    • 具有不对称气泡室的毛细管流体开关
    • US06360775B1
    • 2002-03-26
    • US09221655
    • 1998-12-23
    • Phillip W. BarthLeslie A. FieldDavid K. Donald
    • Phillip W. BarthLeslie A. FieldDavid K. Donald
    • F15C104
    • G02B26/004G02B6/3538G02B6/3544G02B6/3576Y10T137/206Y10T137/2196Y10T137/2224
    • A switching device for controlling fluid motion. The device includes a capillary filled with a first fluid into which a wall-confined bubble of a second fluid is introduced to achieve a first switching event. Capillary geometry and wetting properties provide a pressure-related asymmetric energy potential distribution for controlling the flow of the bubble, and the device is called an asymmetric bubble chamber, or ABC. The bubble is initially trapped in an energy potential well, and upon increase of its volume moves from the well into a region of low energy potential to achieve a second switching event. The first switching event may be blocking of a fluid channel or reflection of an optical beam in an optical crosspoint switch, while the second switching event may be unblocking of a fluid channel or restoration of transmission of an optical beam. The increase in bubble volume between the first and second switching events can act as the stroke of a fluidic piston to pump a volume the first fluid within the capillary. The device can be employed to thermally degas a liquid. The use of large-magnitude geometry-related energy potentials permits rapid cyclical operation of the device in a manner resistant to mechanical shock.
    • 一种用于控制流体运动的开关装置。 该装置包括填充有第一流体的毛细管,其中引入第二流体的壁限制气泡以实现第一切换事件。 毛细管几何形状和润湿性能提供了压力相关的不对称能量势能分布,用于控制气泡的流动,该装置称为不对称气泡室(ABC)。 气泡最初被捕获在能量势阱中,并且当其体积的增加从井移动到低能量潜能的区域以实现第二切换事件时。 第一切换事件可能阻塞光交叉点开关中的流体通道或光束的反射,而第二切换事件可以解除流体通道的阻塞或光束的传输恢复。 第一和第二切换事件之间的气泡体积的增加可以作为流体活塞的冲程来泵送毛细管内的第一流体的体积。 该装置可用于对液体进行热脱气。 使用大幅度几何相关的能量电位允许以机械冲击的方式快速地周期性地操作装置。