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公开(公告)号：US20220128498A1
公开(公告)日：2022-04-28
申请号：US17506658
申请日：2021-10-20
发明人： Seungeon MOON , Jaewoo LEE , Jong Jin JUNG , Jeong Hun KIM , Do Joon YOO , Jong Pil IM
摘要： Provided is a gas sensor including a substrate, a first membrane disposed on the substrate, a heating structure disposed on the first membrane, a second membrane disposed on the heating structure, a sensing electrode disposed on the second membrane, and a sensing material structure disposed on the sensing electrode. Here, the substrate provides an isolation space defined by a recessed surface obtained as a portion of a top surface of the substrate is spaced downward from a bottom surface of the first membrane, and the first membrane provides a first membrane etching hole that vertically extends to connect a top surface and the bottom surface of the first membrane and is connected with the isolation space. Also, the first membrane etching hole has a diameter of about 3 μm to about 20 μm.
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公开(公告)号：US10697912B2
公开(公告)日：2020-06-30
申请号：US16036449
申请日：2018-07-16
摘要： Provided are a gas detection method and a gas detector which have a high durability to silicone poisoning and is capable of detecting the type and the concentration of a target gas to be detected with certain accuracy even when the detector is used in an environment where a silicone compound exists. The gas detector employs a contact combustion-type gas sensor which includes two gas detection elements, each intermittently driven, and in which only one gas detection element is supplied with a gas through a silicone removal filter. Acquired in an energization duration of each of the gas detection elements are two or more pieces of output data by the one gas detection element and two or more pieces of output data by the other gas detection element, which constitutes output variation patterns for a test gas. The output variation patterns are contrasted to a reference output variation pattern of each of four largely divided types of reference gases of a paraffinic hydrocarbon gas, a solvent gas, a hydrogen gas, and an argon gas, with the reference output variation patterns being acquired in advance, thereby identifying the type of the target gas being detected in the test gas.
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公开(公告)号：US20200025701A1
公开(公告)日：2020-01-23
申请号：US16037882
申请日：2018-07-17
申请人： MSA TECHNOLOGY, LLC
摘要： A system includes a primary combustible gas sensor and a trigger combustible gas sensor including a first trigger element of low-thermal-mass which includes a first trigger heating element in operative connection with electronic circuitry. The trigger combustible gas sensor also includes a second trigger element of low thermal mass including a second trigger heating element. The second trigger element is also in operative connection with the electronic circuitry. The electronic circuitry further has a first trigger mode of operating in which the first trigger element is heated to a temperature at or above a temperature at which the first trigger element causes combustion of the at least one combustible gas analyte and wherein the second trigger element is operated as a trigger compensating element. The electronic circuitry is configured to operate the trigger combustible gas sensor to detect a value of a response at or above a threshold value. The primary combustible gas sensor is activated from a low-power state upon the threshold value being detected by the trigger combustible gas sensor.
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公开(公告)号：US5486336A
公开(公告)日：1996-01-23
申请号：US080679
申请日：1993-06-22
CPC分类号： G01N33/0037 , G01N25/30 , F02B1/04
摘要： This invention is a self-contained NO.sub.x sensor assembly. It may be used to detect NO.sub.x levels in a flowing gas stream such as might be found in an exhaust gas from a combustion process and to produce a measurable electrical output related to the content of NO.sub.x measured. The NO.sub.x sensor assembly is of a configuration that may be detached from a mounting and replaced. The sensor assembly comprises two sensor elements one of which is made up of a catalyst on a temperature measuring device. The other is a gas stream ambient temperature measuring device. The catalyst is selected and configured so that it selectively reduces NO.sub.x and the resulting heat of the reaction raises the temperature of the allied temperature measuring device. The sensor assembly also contains a NO.sub.x reductant source. The sensor assembly may be placed in a moving vehicle for measuring NO.sub.x levels in its exhaust gas.
摘要翻译： 本发明是一种独立的NOx传感器组件。 它可以用于检测流动气流中的NOx水平，例如可能在来自燃烧过程的废气中发现，并且产生与所测量的NOx含量相关的可测量的电输出。 NOx传感器组件具有可以从安装和拆卸的构造。 传感器组件包括两个传感器元件，其中一个传感器元件由温度测量装置上的催化剂构成。 另一种是气流环境温度测量装置。 催化剂的选择和配置使得其选择性地还原NOx，并且所产生的反应热量升高了相关温度测量装置的温度。 传感器组件还含有NO x还原剂源。 传感器组件可以放置在移动的车辆中，用于测量其废气中的NOx水平。
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公开(公告)号：US4329874A
公开(公告)日：1982-05-18
申请号：US208136
申请日：1980-11-19
申请人： Shosaku Maeda
发明人： Shosaku Maeda
摘要： A calorimetric apparatus for determining the calorific content of a fuel gas uses a reactor for producing oxidation of the fuel gas and a combustion gas in the presence of a catalytic oxidizer. The catalytic oxidizer is mounted on one end of a thermo-electric element which element has a heat absorbing end and a heat emitting end when energized by an electric current to produce a Peltier effect. The catalytic end of the element is mounted within the reactor while the other end is located outside of the reactor. The temperatures of the ends of the element are detected by a controller and the difference therebetween is maintained at a predetermined level during the catalytic reaction by the controller developing a control signal to control the supply of the electric current to the element. A display control signal is derived from the control signal by the controller and used to control a display for indicating the calorific content of the fuel gas.
摘要翻译： 用于测定燃料气体的热量的量热装置使用在催化氧化剂的存在下生成燃料气体和燃烧气体的氧化反应器。 催化氧化剂安装在热电元件的一端，该元件在通过电流通电时具有吸热端和发热端，以产生珀尔帖效应。 元件的催化末端安装在反应器内，而另一端位于反应器外部。 元件的端部的温度由控制器检测，并且在催化反应期间，它们之间的差异通过控制器开发控制信号来保持在预定水平，以控制对元件的电流的供应。 显示控制信号由控制器从控制信号导出，并用于控制用于指示燃料气体的发热量的显示。
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6.发明授权
公开(公告)号：US4125018A
公开(公告)日：1978-11-14
申请号：US791462
申请日：1977-04-27
CPC分类号： G01N25/28 , Y10T137/1987 , Y10T137/7759
摘要： Method of and means for accurately measuring the calorific value of combustible gases wherein a mixture of combustible gas and combustion-supporting gas is burned in a pair of flames, the temperatures of the burned gases in both flames being monitored and the volume ratios of the combustion-supporting gas to the combustible gas fed to both burners being adjusted so as to maintain the average of said temperatures at substantially maximum; the volume ratio of said gases which produces said maximum average temperatures varying substantially directly with the calorific value of said combustible gas; the aforesaid calorific value being proportional to said volume ratio of said gases which maximizes said average temperatures; the flow rates of said gases being measured by a single flow sensing system, preferably, of the turbine flowmeter types, or the volumetric flow rate of said combustion-supporting gas being maintained at a constant value while the volumetric flow rate of said combustible gas is being measured; said calorific value measuring method and means being unaffected by ambient temperature and other varying environmental factors. In one embodiment, automatic calibration of the device is obtained by alternately feeding a standard gas and the unknown gas to the burners.
摘要翻译： 用于精确测量可燃气体的热值的方法和装置，其中可燃气体和燃烧负载气体的混合物在一对火焰中燃烧，两个火焰中的燃烧气体的温度被监测，并且燃烧的体积比 供给到两个燃烧器的可燃气体的支撑气体被调节以便将所述温度的平均值保持在基本上最大值; 产生所述最大平均温度的所述气体的体积比基本上直接与所述可燃气体的热值变化; 上述热值与所述气体的体积比成比例，使所述平均温度最大化; 所述气体的流量通过单个流量感测系统测量，优选涡轮流量计类型，或所述燃烧负载气体的体积流量保持在恒定值，而所述可燃气体的体积流量为 被测量 所述热值测量方法和装置不受环境温度和其他变化的环境因素的影响。 在一个实施例中，通过将标准气体和未知气体交替地供给到燃烧器来获得装置的自动校准。
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公开(公告)号：US4063898A
公开(公告)日：1977-12-20
申请号：US724682
申请日：1976-09-20
CPC分类号： G01N25/32 , Y10T436/205831 , Y10T436/214
摘要： A differential thermocouple combustible gas detector is provided by coating one thermocouple junction of a differential thermocouple pair with a catalyst and the other thermocouple junction with a non-catalyst. Heated combustible gases react with the catalyst to liberate heat to the catalyst coated thermocouple junction in proportion to the concentration of combustible gases and proportionally raise the temperature of that junction above the non-catalyst coated junction. The output signal from the differential thermocouple device is thus a signal indicative of the concentration of combustible gases.
摘要翻译： 差分热电偶可燃气体检测器通过将差动热电偶对的一个热电偶接头与催化剂和另一个与非催化剂的热电偶接头相结合来提供。 加热的可燃气体与催化剂反应，以与可燃气体的浓度成比例地将热量释放到催化剂涂覆的热电偶连接处，并成比例地将该结点的温度升高到非催化剂涂覆的结点之上。 因此，来自差分热电偶装置的输出信号是指示可燃气体浓度的信号。
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8.发明授权
公开(公告)号：US3777562A
公开(公告)日：1973-12-11
申请号：US3777562D
申请日：1972-04-13
发明人： CLINGMAN W
CPC分类号： G01N25/32
摘要： Methods of and means for measuring the calorific value of combustible gases wherein a mixture of a combustible gas and a combustion-supporting gas is burned in one or more flames, the temperature or temperatures of the burned gases being monitored and the volume ratio of the combustion-supporting gas to the combustible gas being adjusted so as to maintain said temperature or the average of said temperatures at substantially maximum; the volume ratio of said gases which produces said maximum temperature varying substantially directly with the calorific value of said combustible gas.
摘要翻译： 用于测量可燃气体的热值的方法和装置，其中可燃气体和助燃气体的混合物在一个或多个火焰中燃烧，被监测的燃烧气体的温度或温度以及燃烧的体积比 对可燃气体的支撑气体进行调节，以将所述温度或所述温度的平均值保持在基本上最大值; 产生所述最大温度的所述气体的体积比基本上直接与所述可燃气体的热值变化。
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公开(公告)号：US11841279B2
公开(公告)日：2023-12-12
申请号：US17089077
申请日：2020-11-04
发明人： Donald J. Russell , David Serrell
摘要： Described is a calorimeter that includes a thermal column, a sample container, a reference container, a thermal shield, a diffusion-bonded block and a thermal plate. One or more heat flux sensors are disposed between the thermal column and the sample container and between the thermal column and the reference container. The thermal shield is in thermal communication with the thermal column and is separated from and substantially encloses the sample container, reference container and thermal column. The diffusion-bonded block includes a first metallic layer having a first thermal conductivity, a second metallic layer having a second thermal conductivity and a third metallic layer having a third thermal conductivity. The second thermal conductivity is different from the first and third thermal conductivities. The first metallic layer is in thermal communication with the base of the thermal column and the third metallic layer is in thermal communication with the thermal plate.
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公开(公告)号：US20210255131A1
公开(公告)日：2021-08-19
申请号：US17059087
申请日：2019-11-20
申请人： Carrier Corporation
发明人： Jon K. Evju , Gary Follett , Thi A. Nguyen , David P. Potasek , Roger Alan Backman , Anand Venkatesh Sankarraj , Siqi Wei
摘要： A combustible gas sensor that includes a reference sensor. The reference sensor includes a first substrate having a first substrate first surface, a first insulating layer disposed on the first substrate first surface, and a first heater at least one of embedded within the first insulating layer and disposed on the first insulating layer. The first substrate is a MEMS substrate.
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