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公开(公告)号：WO1987002460A1
公开(公告)日：1987-04-23
申请号：PCT/US1986002150
申请日：1986-10-10
Applicant: ANDROS ANALYZERS INCORPORATED
Inventor： ANDROS ANALYZERS INCORPORATED , PARNOFF, George, Kenneth , PASSARO, Robert, Eugene , ROGERS, Raymond, Earl , WILLIAMS, Kevin, Graham
IPC: G01N21/61
CPC classification number: G01N21/3504 , G01N21/314 , G01N2021/3129 , G01N2201/127 , G01N2201/12723
Abstract: A gaz analyzer comprising a sample cell (21) for containing a gas mixture to be analyzed, a source (11) for producing and directing infrared energy through the sample cell, a rotary filter wheel (17) having at least one filter thereon for passing infrared energy limited to a wavelength band within the characteristic absorption band of a predetermined gas and having a dark level region substantially opaque to infrared energy, a drive (19, 20) for supporting and rotating the filter wheel to successively interpose the filter and the dark level region between the source and the sample cell in the path (13) of the infrared energy directed by the source, a detector (15) for detecting infrared energy passing through the sample cell and producing an electrical signal representative thereof, and a signal processor (24) connected to the detector means for producing an output indicating the concentration of the predetermined gas in the sample cell by comparing the electrical signals produced by the detector with the filter positioned in the infrared energy path and with the dark level region positioned in the infrared energy path. The dark level region has a substantially fully reflective surface oriented toward the sample cell (21) when positioned in the infrared energy path whereby infrared energy impinging thereon is reflected.
Abstract translation: 一种包括用于容纳要分析的气体混合物的样品池（21）的gaz分析器，用于产生和引导红外能量通过样品池的源（11），具有至少一个过滤器的旋转滤光轮（17），用于通过 限制在预定气体的特征吸收带内的具有对红外能量基本不透明的暗电平区域的波长带的红外能量;用于支撑和旋转滤光轮以依次插入滤光器和黑暗的驱动器（19,20） 由源极引导的红外能量的路径（13）中的源极和样品池之间的水平区域，用于检测穿过样品池的红外能量并产生表示其的电信号的检测器（15），以及信号处理器 （24），其连接到检测器装置，用于通过比较由t产生的电信号来产生指示样品池中预定气体的浓度的输出 他的检测器具有位于红外能量路径中的过滤器，并且暗层区域位于红外能量路径中。 当位于红外能量路径中时，暗电平区域具有朝向样品池（21）定向的基本上完全反射的表面，由此反射其上的红外能量。
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公开(公告)号：WO1990004164A1
公开(公告)日：1990-04-19
申请号：PCT/US1989004389
申请日：1989-10-03
Applicant: ANDROS ANALYZERS INCORPORATED
Inventor： ANDROS ANALYZERS INCORPORATED , WILLIAMS, Kevin, Graham
IPC: G01N21/35
CPC classification number: G01N21/3504 , G01N2021/3133 , G01N2021/3137 , G01N2021/3166
Abstract: A gaz analyzer for measuring the transmission of infrared radiation through a gas mixture, determining the concentrations of the gases in the mixture, identifying one of the gases, reporting the concentration of the identified gas, and detecting contamination of the gas. The gas analyzer has a sample cell (21) for containing the gas mixture, source of infrared radiation (11), a set of specifically chosen filters, a signal processor (24), and a microprocessor (59) that computes the concentrations of the gases and implements decision logic for identifying one gas and detecting contamination of that gas. In one embodiment, a filter wheel (17) holds the filters between the source and the sample cell and there is a single detector placed downstream from the sample cell. In a second embodiment, a chopper produces an AC signal from the infrared radiation source and there are three filters, one in front of each of three detectors. An alternate embodiment measures, calculates, and reports the concentrations of three anesthetizing agents.
Abstract translation: 用于测量通过气体混合物的红外辐射透射的gaz分析器，确定混合物中气体的浓度，识别气体中的一种，报告所识别的气体的浓度，以及检测气体的污染。 气体分析器具有用于容纳气体混合物的样品池（21），红外线辐射源（11），一组特别选择的过滤器，信号处理器（24）和微处理器（59），其计算浓度 气体和实施用于识别一种气体并检测该气体的污染的决定逻辑。 在一个实施例中，过滤轮（17）将过滤器保持在源和样品池之间，并且存在放置在样品室下游的单个检测器。 在第二实施例中，斩波器从红外辐射源产生AC信号，并且存在三个滤光器，一个在三个检测器中的每一个之前。 替代实施例测量，计算和报告三种麻醉剂的浓度。
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公开(公告)号：WO1989003029A1
公开(公告)日：1989-04-06
申请号：PCT/US1988003116
申请日：1988-09-09
Applicant: ANDROS ANALYZERS INCORPORATED
IPC: G01N21/61
CPC classification number: G01N21/3504 , G01N2021/3137 , G01N2021/3166 , G01N2201/1215
Abstract: A non-dispersive infrared gas analyzer is disclosed that accurately measures the concentration levels of a plurality of gases within a gas mixture. The analyzer includes first and second sample cells (11, 13) and is utilized advantageously for the measurement of NOx and hydrocarbon gas present in the exhaust of an automobile engine. The gas mixture of the exhaust is chilled before entering the first sample cell (11) to remove a substantial amount of the water vapor from that sample cell (13) to facilitate measurement of the NOx gas. The second sample cell receives the gas mixture in an unchilled state to allow for accurate measurement of the hydrocarbon gas. The analyzer includes processors (37, 39) which are utilized to further correct the NOx measurement and which also interact with each other to provide an output data stream that is representative of the concentration levels of the gases that are being analyzed.
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公开(公告)号：WO1989009930A1
公开(公告)日：1989-10-19
申请号：PCT/US1989001602
申请日：1989-04-14
Applicant: ANDROS ANALYZERS INCORPORATED
Inventor： ANDROS ANALYZERS INCORPORATED , ROGERS, Raymond, Earl
IPC: G01N21/61
CPC classification number: G01N21/3504 , G01J1/18 , G01N21/274 , G01N2021/3129 , G01N2201/1211 , G01N2201/126
Abstract: An arrangement for ensuring the stability of the set point for a gas analyzer is disclosed. The set point control circuit (30b) utilizes an amplifier (192) which is alternately switched between a reference voltage and a sensor signal to provide a signal to a processor (39) representing the reference signal and the sensor singal. The processor (39) compares the two signals and adjusts the heater (60) associated with the sensor to provide a stable set point for the gas analyzer. The arrangement eliminates the need for precision resistors within the set point control circuit and therefore significantly reduces the cost of the circuitry.
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公开(公告)号：WO1987004240A1
公开(公告)日：1987-07-16
申请号：PCT/US1987000051
申请日：1987-01-09
Applicant: ANDROS ANALYZERS INCORPORATED
Inventor： ANDROS ANALYZERS INCORPORATED , PASSARO, Robert, Eugene , ROGERS, Raymond, Earl , GRIFFITH, Craig, James
IPC: G01J01/00
CPC classification number: G01N21/274 , G01N21/3504 , G01N2021/3159 , G01N2021/3166 , G01N2201/126 , G01N2201/1273 , G01N2201/12769
Abstract: Automatic zeroing apparatus zeroes an infrared gas analyzer automatically upon the occurrence of preselected conditions to indicate zero in the absence of absorption of infrared radiation by a gas mixture being analyzed. The gas analyzer has a sample cell (11) for containing a gas mixture to be analyzed. Infrared radiation directed through the sample cell (11) is detected at a preselected wavelength to produce a detection signal. A signal processor outputs a signal systematically related to the difference between the detection signal and a reference signal. For zeroing the sample cell (11) is filled with gas substantially nonabsorbent of infrared radiation at the respective characteristic wavelength. A comparator produces an error signal when the output signal differs from zero. A gain control (DAC 21) automatically controls the signal level of the detection signal to reduce the output signal substantially to zero with the nonabsorbent gas filling the sample cell (11). The preselected conditions may include the passage of a predetermined time and a temperature drift beyond a predetermined limit.
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Patent Agency Ranking
公开(公告)号：WO1986002445A1
公开(公告)日：1986-04-24
申请号：PCT/US1985001970
申请日：1985-10-09
Applicant: ANDROS ANALYZERS INCORPORATED
Inventor： ANDROS ANALYZERS INCORPORATED , WONG, Jacob, Yauman
IPC: G01J01/42
CPC classification number: G01J3/433 , G01J2003/4334 , G01N21/33
Abstract: A method and apparatus for detecting the presence and amount of elemental oxygen in a sample cell (15). The intensity of extreme ultraviolet light passing through the sample cell (15) at a wavelength band overlapping at least one of the Schumann-Runge absorption lines of oxygen is detected and compared with a predetermined non-absorbed condition of the ultraviolet light. The non-absorbed condition may be achieved by narrowing the wavelength band such that the band does not overlap the Schumann-Runge absorption line, or may be achieved by detecting the ultraviolet light passing through a reference cell. Also described is a novel ultraviolet source (29) in which a cold zone captures neutral atoms of the emission gas to reduce the affect of resonance absorption of emitted ultraviolet light by such neutral atoms.
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公开(公告)号：WO1988002819A1
公开(公告)日：1988-04-21
申请号：PCT/US1987002683
申请日：1987-10-16
Applicant: ANDROS ANALYZERS INCORPORATED
IPC: F04B49/00
Abstract: A fluid flow detecting system and method wherein a pair of electrically heated matched temperature sensitive devices (11, 12) are used to measure fluid flow. One of the devices (11) is placed in a position out of the fluid flow to be measured but in thermal relation to the fluid such that the device (11) is affected by variation in ambient temperature. The other device (12) is placed in the flowing fluid to be measured. Thus, a change in flow rate results in a change in the ratio of dissipation coefficients of the devices (11, 12). Circuitry (17, 45) is coupled to each of the devices (11, 12) for maintaining the two devices at substantially equal temperature. A change in the ratio of the power in the device (11, 12) with respect to each other indicates a change in the dissipation coefficient ratio which is insensitive to variation in ambient temperature.
Abstract translation: 一种流体流动检测系统和方法，其中使用一对电加热匹配的温度敏感装置（11,12）来测量流体流动。 装置（11）中的一个被放置在待测量的流体流动之外的位置，但是与流体成热关系，使得装置（11）受到环境温度的变化的影响。 另一个装置（12）被放置在要测量的流动流体中。 因此，流量的变化导致器件（11,12）的耗散系数比的变化。 电路（17,45）耦合到每个器件（11,12），用于将两个器件保持在基本相等的温度。 装置（11,12）中的功率比相对于彼此的变化表示对环境温度的变化不敏感的耗散系数比的变化。
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公开(公告)号：WO1986002820A1
公开(公告)日：1986-05-22
申请号：PCT/US1985002230
申请日：1985-11-08
Applicant: ANDROS ANALYZERS INCORPORATED
IPC: A61B05/08
CPC classification number: A61M16/08 , A61B5/097 , A61M16/085 , A61M16/1065 , A61M2205/7536
Abstract: An adaptor assembly for sampling gas in an airway tube attached to a patient. The adaptor assembly employs a filter arrangement (17) in a subassembly (15) which extends transversely of the axis of the pateint's airway and maximizes the ratio of the effective filter area of the dead volume added by the adaptor assembly to the sampling system.
Abstract translation: 一种用于在附接到患者的气道管中取样气体的适配器组件。 适配器组件在子组件（15）中使用过滤器装置（17），其横向于pateint的气道的轴线延伸，并且使由适配器组件添加的死体积的有效过滤面积与采样系统的比率最大化。
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公开(公告)号：WO1983004097A1
公开(公告)日：1983-11-24
申请号：PCT/US1983000745
申请日：1983-05-12
Applicant: ANDROS ANALYZERS INCORPORATED
IPC: G01N21/27
CPC classification number: G01N21/3504 , G01N21/274 , G06J1/00
Abstract: Pulse modulated infrared energy (12) is directed through a sample cell (14) containing a gas mixture. The gas mixture may include a selected one of a plurality of gases. Each gas exhibits a characteristic absorption in the infrared wavelengths. A detector (16) responsive to infrared energy at a preselected wavelength develops an AC signal having an amplitude proportional to the infrared energy passing through the sample cell at the preselected wavelength and having a frequency corresponding to the preselected pulse modulation frequency. The preselected wavelength is common to the absorption characteristic of each of said gasses. The AC signal is processed to develop a DC signal having an amplitude determined from the AC signal. The DC signal is applied to an amplifier (28) having a variable gain feedback (30) which provides a plurality of gain steps. Each gain step is associated with a different one of the gasses. A single surrogate gas may be used to calibrate each gain step. The DC signal is amplified by the appropriate gain step to develop a second DC signal proportional to the concentration of the gas and the mixture contained in the sample cell (14). The amplifier (28) may further include an analog to digital convertor (60) which stores a digital equivalent of a zero offset output voltage of the amplifier (28) when its input is grounded. The digital signal is reconverted to an analog signal and a current proportional to such signal is normally applied to the input of the amplifier (28) to maintain zero stability.
Abstract translation: 脉冲调制的红外能量被引导通过含有气体混合物的样品池。 气体混合物可以包括多个气体中选择的一种。 每种气体在红外波长中表现出特征吸收。 在预选波长处响应于红外能量的检测器产生具有与以预选波长通过样本单元的红外能量成比例的振幅并具有对应于预选脉冲调制频率的频率的振幅的AC信号。 预选的波长对于每种所述气体的吸收特性是共同的。 处理AC信号以产生具有从AC信号确定的振幅的DC信号。 DC信号被施加到具有提供多个增益步长的可变增益反馈的放大器。 每个增益步骤与不同的气体相关联，单个替代气体可用于校准每个增益步骤。 DC信号通过适当的增益步长放大，以产生与气体浓度和样品池中所含混合物成比例的第二直流信号。 放大器还可以包括模数转换器，其在其输入接地时存储放大器的零偏移输出电压的数字等效电路。 数字信号被重新转换为模拟信号，并且与这种信号成比例的电流通常被施加到放大器的输入以保持零稳定性。
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公开(公告)号：WO1983000613A1
公开(公告)日：1983-03-03
申请号：PCT/US1982001144
申请日：1982-08-24
Applicant: ANDROS ANALYZERS INCORPORATED
IPC: A61B05/08
CPC classification number: A61B5/1455 , A61B5/0836
Abstract: Method and apparatus for determining the partial pressure of carbon dioxide in the arterial blood of a patient. The method and apparatus are particularly useful where the patient is under anesthesia. Carbon dioxide concentration is measured at the end tidal of the patient's exhaled breath. Nitrous oxide concentration is also measured so that the measured values of the carbon dioxide concentration may be corrected in accordance with the measured value of the nitrous oxide concentration. Particular wavelengths of detection are described, together with other apparatus parameters to provide a high level of accuracy.
Abstract translation: 用于确定患者动脉血中二氧化碳分压的方法和装置。 该方法和装置在患者处于麻醉状态时特别有用。 二氧化碳浓度是在患者呼出的呼气的最后潮汐测量的。 还测量一氧化二氮浓度，以便根据一氧化二氮浓度的测量值来校正二氧化碳浓度的测量值。 与其他设备参数一起描述了特定的检测波长以提供高水平的精度。
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