公开(公告)号：US08265881B1

公开(公告)日：2012-09-11

申请号：US13269368

申请日：2011-10-07

申请人： Vikas Lakhotia ,  G. Jordan Maclay

发明人： Vikas Lakhotia ,  G. Jordan Maclay

IPC分类号： G01N27/26 ,  G06F17/40

CPC分类号： G01N33/005 ,  G01N27/123 ,  G01N33/0059

摘要： A temperature of a gas sensor may be adjusted to a first temperature value for a first period of time and a second temperature value for a second period of time. A signal of the gas sensor may be measured during the first period of time to determine a first signal value and during the second period of time to determine a second value. Then, concentration information for at least one gas is calculated according to the first signal value and the second signal value. While the gas sensor signal may include information about a presence of a first gas and a second gas, the concentration information for the at least one gas may not substantially include concentration information for the second gas.

摘要翻译： 气体传感器的温度可以在第一时间段内被调节到第一温度值，并且可以在第二时间段内被调节到第二温度值。 可以在第一时间段期间测量气体传感器的信号以确定第一信号值，并且在第二时间段期间确定第二值。 然后，根据第一信号值和第二信号值计算至少一种气体的浓度信息。 虽然气体传感器信号可以包括关于第一气体和第二气体的存在的信息，但是至少一种气体的浓度信息可能基本上不包括第二气体的浓度信息。

公开(公告)号：US20220187230A1

公开(公告)日：2022-06-16

申请号：US17601389

申请日：2020-04-06

申请人： H2Scan Corporation

发明人： Dylan Thomas ,  Tim Howard

IPC分类号： G01N27/12 ,  G01N33/00 ,  G01N27/04

摘要： A system and method of determining a target gas concentrations in a fluid environment using a gas sensor that improves the efficiency and accuracy of the gas sensor's measurements by taking measurements of electrical characteristics of the gas sensor at different temperatures, taking measurements during a transition between a first temperature and a second temperature, taking more frequent measurements, detecting when the gas sensor has reached equilibrium, using multiple sensors, accounting for offsets and drifts, reducing the time the sensor is not live, using various algorithms, or any combination thereof.

公开(公告)号：US07901553B2

公开(公告)日：2011-03-08

申请号：US11046398

申请日：2005-01-27

申请人： Timothy Howard ,  Carlton Salter

发明人： Timothy Howard ,  Carlton Salter

IPC分类号： G01N27/26

CPC分类号： G01N27/227 ,  G01N33/005

摘要： A system for sensing a gas stream constituent comprises: (a) a thermally conductive, electrically insulative substrate, (b) a gas-sensing element mounted on the substrate and capable of sensing the constituent, (c) a reference element mounted on the substrate having electrical properties congruent with the gas-sensing element and being insensitive to the constituent, (d) an electronic circuit interconnecting the gas-sensing element and the reference element. The circuit is capable of actuating both of the elements and measuring the voltage difference between the elements. The voltage difference is proportional to the concentration of the constituent in the gas stream.

摘要翻译： 用于感测气流成分的系统包括：（a）导热的电绝缘衬底，（b）安装在衬底上并且能够感测组成部分的气体感测元件，（c）安装在衬底上的参考元件 具有与气体感测元件一致的电特性并且对构件不敏感，（d）将气体感测元件和参考元件互连的电子电路。 该电路能够致动两个元件并测量元件之间的电压差。 电压差与气流中成分的浓度成比例。

公开(公告)号：US10605795B2

公开(公告)日：2020-03-31

申请号：US14624400

申请日：2015-02-17

申请人： H2Scan Corporation

发明人： Vikas Lakhotia ,  An T. Nguyen Le ,  G. Jordan Maclay

IPC分类号： G01N33/00 ,  G01N27/04 ,  G01N27/12 ,  G01N27/22

摘要： A method for measuring hydrogen concentration in a gas includes exposing a PdNi alloy thin-film gas sensor to the gas, alternately controlling the temperature of the PdNi alloy thin-film gas sensor between a first temperature for a first period of time and a second temperature for a second period of time while the PdNi alloy thin-film sensor is exposed to the gas, continuously monitoring the resistance of the PdNi alloy thin-film gas sensor during the first and second periods of time, and calculating the hydrogen concentration as a function of a transient in the resistance of the PdNi alloy thin-film sensor measured at a time that the temperature transitions between the first temperature and the second temperature.

公开(公告)号：US10197519B2

公开(公告)日：2019-02-05

申请号：US14208141

申请日：2014-03-13

申请人： H2Scan Corporation

发明人： Vikas Lakhotia ,  An Trong Nguyen Le ,  Timothy Wayne Howard ,  Matthew Robert Phillipps

IPC分类号： G01N25/00 ,  G01N27/12

摘要： An apparatus and method for sensing the amount of a gas in a fluid are disclosed. The apparatus may include a gas sensor, a temperature sensor, a first temperature adjusting unit, or a second temperature adjusting unit. The first and second temperature adjusting units may control the temperature of the gas sensor. The first and second temperature adjusting units may each be used to control the temperature of the gas sensor. According to one technique, they may be used simultaneously to control the temperature of the gas sensor. The temperature sensor may be used to sense the temperature of the gas when it has stabilized to the fluid temperature in which it is being used and the temperature of the gas sensor when it is being controlled by at least one of the first or second temperature adjusting units.

公开(公告)号：US08706424B2

公开(公告)日：2014-04-22

申请号：US12495735

申请日：2009-06-30

申请人： Scott Stephens

发明人： Scott Stephens

IPC分类号： G06F19/00

CPC分类号： G01N33/005 ,  G01N27/22 ,  G01N33/0034

摘要： A system for estimating gas concentrations in a mixed atmosphere includes (a) a plurality of sensors for providing a set of measurements, at least one of the sensors sensitive to an internal concentration of hydrogen; and (b) a processor for receiving the set of measurements and for executing a sequential estimation filter that includes a plurality of states having a corresponding set of values. The processor responsively adjusts at least a portion of the set of values in response to the set of measurements. The plurality of sensors can include a resistive sensor and a capacitive gas sensor, both of which are sensitive to hydrogen concentration. The plurality of states can include states representative of hydrogen pressure in the mixed atmosphere, hydrogen concentration in a bulk material of at least one of the sensors, and hydrogen concentration in an interface layer of at least one of the sensors.

摘要翻译： 用于估计混合气氛中的气体浓度的系统包括：（a）用于提供一组测量的多个传感器，至少一个对内部浓度的氢敏感的传感器; 以及（b）处理器，用于接收所述测量集合并且用于执行包括具有相应值集合的多个状态的顺序估计滤波器。 处理器响应于该组测量响应地响应于调整该组值的至少一部分。 多个传感器可以包括对氢浓度敏感的电阻式传感器和电容性气体传感器。 多个状态可以包括表示混合气氛中的氢气压力的状态，至少一个传感器的散装材料中的氢浓度以及至少一个传感器的界面层中的氢浓度。

公开(公告)号：US09267929B2

公开(公告)日：2016-02-23

申请号：US13607079

申请日：2012-09-07

申请人： Vikas Lakhotia ,  G. Jordan Maclay

发明人： Vikas Lakhotia ,  G. Jordan Maclay

IPC分类号： G01N27/12 ,  G01N33/00

CPC分类号： G01N33/005 ,  G01N27/123 ,  G01N33/0059

摘要： A method can be performed by adjusting a temperature of a gas sensor to a first temperature value for a first period of time and a second temperature value for a second period of time. The gas sensor signal may be measured during the first period of time to determine a first signal value and during the second period of time to determine a second value. Then, concentration information for at least one gas is calculated according to the first signal value and the second signal value. While the gas sensor signal may include information about a presence of a first gas and a second gas, the concentration information for the at least one gas may not substantially include concentration information for the second gas.

摘要翻译： 可以通过将气体传感器的温度调节到第一时间段的第一温度值和第二时间段的第二温度值来执行方法。 可以在第一时间段期间测量气体传感器信号以确定第一信号值，并且在第二时间段期间确定第二值。 然后，根据第一信号值和第二信号值计算至少一种气体的浓度信息。 虽然气体传感器信号可以包括关于第一气体和第二气体的存在的信息，但是至少一种气体的浓度信息可能基本上不包括第二气体的浓度信息。

公开(公告)号：US07913542B2

公开(公告)日：2011-03-29

申请号：US11831865

申请日：2007-07-31

申请人： Robert Pendergrass

发明人： Robert Pendergrass

IPC分类号： G01N27/26

CPC分类号： G01N33/0009 ,  Y10T29/49826

摘要： A gas sensor assembly detects a constituent in a gaseous stream. The assembly comprises: (a) a mounting surface, (b) a sensor mounted on the mounting surface and sensor capable of generating a detectable signal in the presence of the constituent, and (c) an enclosing structure. The enclosing structure comprises: (i) a walled component having a pair of vertically spaced ends and mounted at one end on the mounting surface so as to circumscribe the sensor, and (ii) a gas-permeable membrane attached at the other end of the walled component, thereby defining an interior volume within said enclosing structure. Flowing the gaseous stream across the membrane infuses a portion of the gaseous stream into said interior volume containing the sensor.

摘要翻译： 气体传感器组件检测气流中的成分。 组件包括：（a）安装表面，（b）安装在安装表面上的传感器和能够在组分存在的情况下产生可检测信号的传感器，以及（c）封闭结构。 所述封闭结构包括：（i）具有一对垂直间隔开的端部的壁部件，并且一端安装在所述安装表面上以围绕所述传感器，以及（ii）在所述安装面的另一端处附接的透气膜 从而限定所述封闭结构内的内部容积。 使气流穿过膜流动将一部分气流输入到包含传感器的所述内部容积中。

公开(公告)号：US07565827B2

公开(公告)日：2009-07-28

申请号：US11761990

申请日：2007-06-12

申请人： Carlton Salter ,  Robert Pendergrass

发明人： Carlton Salter ,  Robert Pendergrass

IPC分类号： G01L23/22

CPC分类号： G01N33/0032 ,  G01N33/005 ,  Y10T29/49002

摘要： A gas sensor for sensing a gas stream constituent includes, mounted a substrate, a first gas-sensing element capable of sensing the constituent in a first concentration range, a reference element insensitive to the constituent and having electrical properties congruent with the first gas-sensing element, a heating element substantially circumscribing the first gas-sensing element and the reference element, a temperature-sensing element circumscribing the first gas-sensing element and the reference element, and a second gas-sensing element capable of sensing the constituent in a second concentration range. The first gas-sensing element and the reference element are preferably metal-gated metal-oxide semiconductor (MOS) solid-state devices. The gas sensor is particularly configured to sense hydrogen concentration in a gas stream.

摘要翻译： 用于感测气流成分的气体传感器包括：安装基板，能够感测第一浓度范围内的成分的第一气体感测元件，对该成分不敏感且具有与第一气体感测一致的电特性的参考元件 元件，基本上限定第一气体感测元件和参考元件的加热元件，限定第一气体感测元件和参考元件的温度感测元件，以及能够在第二气体感测元件和参考元件中感测成分的第二气体感测元件 浓度范围 第一气体感测元件和参考元件优选是金属栅极金属氧化物半导体（MOS）固态器件。 气体传感器特别构造成检测气流中的氢气浓度。

公开(公告)号：US07389672B2

公开(公告)日：2008-06-24

申请号：US11046371

申请日：2005-01-27

申请人： Timothy Howard ,  Robert Pendergrass ,  Carlton Salter

发明人： Timothy Howard ,  Robert Pendergrass ,  Carlton Salter

IPC分类号： G01N7/00

CPC分类号： G01N33/0009 ,  Y10T29/49002

摘要： A gas sensor assembly detects the presence of a constituent in a first gas stream. The assembly comprises: (a) a flexible circuit having a pair of oppositely-facing surfaces, (b) a sensor mounted on one surface of the flex circuit, the sensor electrically connected to conductors in the flex circuit, and (c) a channel for directing a second gas stream across the flex circuit surface facing away from the sensor, the channel formed at least in part by the flex circuit surface facing away from the sensor. The first and second gas streams can be derived from a common gas stream. In operation, thermal conductivity between the sensor and neighboring heat-conducting structures components is reduced, thereby reducing sensor electric power consumption.

摘要翻译： 气体传感器组件检测第一气流中成分的存在。 组件包括：（a）具有一对相对表面的柔性电路，（b）安装在柔性电路的一个表面上的传感器，传感器电连接到柔性电路中的导体，以及（c）通道 用于将第二气流引导穿过柔性电路表面背向传感器，所述通道至少部分地由柔性电路表面形成为远离传感器。 第一和第二气流可以从公共气流中得到。 在操作中，传感器和相邻的导热结构部件之间的导热性降低，从而降低了传感器的电力消耗。