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    • 4. 发明申请
    • GAS ANALYSIS SYSTEM AND METHOD
    • 气体分析系统和方法
    • US20080134755A1
    • 2008-06-12
    • US11567761
    • 2006-12-07
    • Yufeng HUANG
    • Yufeng HUANG
    • G01N29/02
    • G01N29/024G01F1/668G01F1/86G01N29/222G01N29/4418G01N2291/0215G01N2291/02836
    • A method of analyzing a gas specimen mixture includes measuring the concentrations of inert components in the gas specimen mixture and the pressure and temperature of the gas specimen mixture. A number of sample gas mixtures are generated with varying percentages of hydrocarbon gases, each including the measured inert component concentrations. For each generated sample gas mixture, the method includes calculating the speed of sound therein based on the measured pressure and temperature and the particular percentages of hydrocarbon gases therein, measuring the speed of sound in the gas specimen mixture, and iteratively comparing the measured speed of sound with the calculated speed of sound in different sample gas mixtures until convergence for a particular sample gas mixture. The molecular weight of the particular sample gas mixture is calculated, and set the molecular weight of the gas specimen mixture to the calculated molecular weight.
    • 分析气体样品混合物的方法包括测量气体样品混合物中的惰性组分的浓度和气体样品混合物的压力和温度。 产生多种样品气体混合物,其具有不同百分比的烃气体,每个气体混合物包括测量的惰性组分浓度。 对于每个产生的样品气体混合物,该方法包括基于所测量的压力和温度以及其中的烃气体的特定百分比来计算其中的声速,测量气体样品混合物中的声速,并且迭代地比较测量的速度 声音与不同样品气体混合物中计算出的声速,直到特定样品气体混合物收敛。 计算特定样品气体混合物的分子量,并将气体样品混合物的分子量设定为计算的分子量。
    • 5. 发明申请
    • GAS ANALYSIS SYSTEM AND METHOD
    • 气体分析系统和方法
    • US20080134751A1
    • 2008-06-12
    • US11567763
    • 2006-12-07
    • Yufeng HUANG
    • Yufeng HUANG
    • G01N7/00
    • G01N29/024G01F1/667G01F1/86G01N29/222G01N29/4418G01N2291/02836
    • A gas specimen mixture analysis system includes at least one sensor for measuring the concentrations of inert components in the gas specimen mixture, a pressure sensor for measuring the pressure of the gas specimen mixture, and a temperature sensor for measuring the temperature of the gas specimen mixture. A subsystem measures the speed of sound in the gas specimen mixture, and a processing subsystem, responsive to the at least one inert component sensor, the pressure sensor, the temperature sensor, and the subsystem for measuring the speed of sound, is configured to generate a number of sample gas mixtures with varying percentages of hydrocarbon gases, each including the measured inert component concentrations. The processing subsystem is also configured to calculate, for each generated sample gas mixture, the speed of sound therein based on the measured pressure and temperature and the particular percentages of hydrocarbon gases therein, and iteratively compare the measured speed of sound with the calculated speed of sound in different sample gas mixtures until convergence for a particular sample gas mixture. The processing subsystem is further configured to calculate the molecular weight of the particular sample gas mixture and set the molecular weight of the gas specimen mixture to the calculated molecular weight.
    • 气体样品混合物分析系统包括至少一个用于测量气体样品混合物中的惰性组分浓度的传感器,用于测量气体样品混合物的压力的压力传感器和用于测量气体样品混合物的温度的温度传感器 。 子系统测量气体样品混合物中的声速,并且响应于至少一个惰性组分传感器,压力传感器,温度传感器和用于测量声速的子系统的处理子系统被配置为产生 许多具有不同百分比烃类气体的样品气体混合物,各自包括测量的惰性组分浓度。 处理子系统还被配置为基于所测量的压力和温度以及其中的烃类气体的特定百分比来计算每个产生的样品气体混合物的声速,并且迭代地将测得的声速与计算出的速度 在不同样品气体混合物中的声音直到特定样品气体混合物收敛。 处理子系统还被配置为计算特定样品气体混合物的分子量,并将气体样品混合物的分子量设定为计算的分子量。
    • 6. 发明申请
    • METHOD OF CALIBRATING A WAVELENGTH-MODULATION SPECTROSCOPY APPARATUS
    • 校准波长调制光谱仪的方法
    • US20110181877A1
    • 2011-07-28
    • US13083704
    • 2011-04-11
    • Xiaoyong LiuYufeng HuangJohn McKinley PooleGene Smith BerkowitzAnthony KowalShawn D. WeheHejie Li
    • Xiaoyong LiuYufeng HuangJohn McKinley PooleGene Smith BerkowitzAnthony KowalShawn D. WeheHejie Li
    • G01J3/28
    • G01J3/4338
    • Several methods of calibrating a wavelength-modulation spectroscopy apparatus configured to measure a concentration of an analyte in a sample gas are disclosed. Each of the methods allows for calibration and recalibration using a relatively safe gas regardless of whether the sample gas for which the concentration of the analyte can be determined is a hazardous gas. In one embodiment of the invention, calibration that is sample-gas specific is, accomplished by determining a first slope coefficient and calibration function for the sample gas, after which a scaling factor can be determined based on the first slope coefficient and a second slope coefficient for the same or a different sample gas and used in a subsequent calibration (or recalibration) to scale the calibration function. In other embodiments of the invention, calibration that is not sample-gas specific is accomplished to allow for the determination of the analyte concentration in variable gas compositions and constant gas compositions.
    • 公开了一种校准配置成测量样品气体中分析物的浓度的波长调制光谱仪的几种方法。 每种方法允许使用相对安全的气体进行校准和重新校准,而不管可以确定分析物浓度的样品气体是否是有害气体。 在本发明的一个实施例中,通过确定样品气体的第一斜率系数和校准函数来实现样品气体特异性的校准,之后可以基于第一斜率系数和第二斜率系数确定比例因子 用于相同或不同的样品气体,并用于随后的校准(或重新校准)以缩放校准功能。 在本发明的其它实施方案中,完成不是采样气体特异性的校准,以允许确定可变气体组成和恒定气体组成中的分析物浓度。
    • 7. 发明申请
    • METHOD OF CALIBRATING A WAVELENGTH-MODULATION SPECTROSCOPY APPARATUS
    • 校准波长调制光谱仪的方法
    • US20110181876A1
    • 2011-07-28
    • US13083697
    • 2011-04-11
    • Xiaoyong LiuYufeng HuangJohn McKinley PooleGene Smith BerkowitzAnthony KowalShawn D. WeheHejie Li
    • Xiaoyong LiuYufeng HuangJohn McKinley PooleGene Smith BerkowitzAnthony KowalShawn D. WeheHejie Li
    • G01J3/28
    • G01J3/4338
    • Several methods of calibrating a wavelength-modulation spectroscopy apparatus configured to measure a concentration of an analyte in a sample gas are disclosed. Each of the methods allows for calibration and recalibration using a relatively safe gas regardless of whether the sample gas for which the concentration of the analyte can be determined is a hazardous gas. In one embodiment of the invention, calibration that is sample-gas specific is accomplished by determining a first slope coefficient and calibration function for the sample gas, after which a scaling factor can be determined based on the first slope coefficient and a second slope coefficient for the same or a different sample gas and used in a subsequent calibration (or recalibration) to scale the calibration function. In other embodiments of the invention, calibration that is not sample-gas specific is accomplished to allow for the determination of the analyte concentration in variable gas compositions and constant gas compositions.
    • 公开了一种校准配置成测量样品气体中分析物的浓度的波长调制光谱仪的几种方法。 每种方法允许使用相对安全的气体进行校准和重新校准,而不管可以确定分析物浓度的样品气体是否是有害气体。 在本发明的一个实施例中,通过确定样品气体的第一斜率系数和校准函数来实现样品气体特异性的校准,之后可以基于第一斜率系数和第二斜率系数确定缩放因子, 相同或不同的样品气体,并用于随后的校准(或重新校准)以缩放校准功能。 在本发明的其它实施方案中,完成不是采样气体特异性的校准,以允许确定可变气体组成和恒定气体组成中的分析物浓度。
    • 8. 发明授权
    • Gas analysis system and method
    • 气体分析系统及方法
    • US07752885B2
    • 2010-07-13
    • US11567763
    • 2006-12-07
    • Yufeng Huang
    • Yufeng Huang
    • G01N29/02G01N7/00
    • G01N29/024G01F1/667G01F1/86G01N29/222G01N29/4418G01N2291/02836
    • A gas specimen mixture analysis system includes at least one sensor for measuring the concentrations of inert components in the gas specimen mixture, a pressure sensor for measuring the pressure of the gas specimen mixture, and a temperature sensor for measuring the temperature of the gas specimen mixture. A subsystem measures the speed of sound in the gas specimen mixture, and a processing subsystem, responsive to the at least one inert component sensor, the pressure sensor, the temperature sensor, and the subsystem for measuring the speed of sound, is configured to generate a number of sample gas mixtures with varying percentages of hydrocarbon gases, each including the measured inert component concentrations. The processing subsystem is also configured to calculate, for each generated sample gas mixture, the speed of sound therein based on the measured pressure and temperature and the particular percentages of hydrocarbon gases therein, and iteratively compare the measured speed of sound with the calculated speed of sound in different sample gas mixtures until convergence for a particular sample gas mixture. The processing subsystem is further configured to calculate the molecular weight of the particular sample gas mixture and set the molecular weight of the gas specimen mixture to the calculated molecular weight.
    • 气体样品混合物分析系统包括至少一个用于测量气体样品混合物中的惰性组分浓度的传感器,用于测量气体样品混合物的压力的压力传感器和用于测量气体样品混合物的温度的温度传感器 。 子系统测量气体样品混合物中的声速,响应于至少一个惰性组分传感器,压力传感器,温度传感器和用于测量声速的子系统的处理子系统被配置为产生 许多具有不同百分比烃类气体的样品气体混合物,各自包括测量的惰性组分浓度。 处理子系统还被配置为基于所测量的压力和温度以及其中的烃类气体的特定百分比来计算每个产生的样品气体混合物的声速,并且迭代地将测得的声速与计算出的速度 在不同样品气体混合物中的声音直到特定样品气体混合物收敛。 处理子系统还被配置为计算特定样品气体混合物的分子量,并将气体样品混合物的分子量设定为计算的分子量。
    • 9. 发明授权
    • Gas analyzer with background gas compensation
    • 气体分析仪,背景气体补偿
    • US6112576A
    • 2000-09-05
    • US387988
    • 1999-09-01
    • S. Gregory TsopelasYufeng HuangRobert H Hammond
    • S. Gregory TsopelasYufeng HuangRobert H Hammond
    • G01N27/74
    • G01N27/74
    • A sensor responds to a magnetic wind produced by the magnetic susceptibility of a target component gas, such as oxygen, which is present together with a background gas in a sample located in a measurement field produced in a measurement device. A background sampler also determines thermal and physical characteristics in a conditioned flow path, and a processor performs a computational correction on the detected magnetic wind signal to more accurately determine the concentration of the target gas. The background sampler includes a mass flow cell in series with a laminar flow device to measure heat capacity and viscous properties of the sample. It derives the gas viscosity from a differential pressure measurement; and preferably determines the heat capacity and thermal conductivity of background gases, the composition of which may be unknown, to compensate for their effects on the magnetic wind sensor elements. A further correction for diamagnetism of the background is made using one or more correlations between the measured parameters in certain common gases or classes of gases. The determination of gas bulk properties allows the concentration of the target gas to be made with enhanced accuracy in the presence of unknown, unquantified or changing background components, and the necessary hardware may be used in conjunction with existing magnetic wind sensor and processor. In that case, the processor program is modified to apply the additional sensor inputs to correct the magnetic wind reading. A thermal conductivity correction is also made, and this may be directly derived from the bridge control signal when operating the magnetic wind sensors in mode to maintain constant temperature. The system may be used in petroleum tanks and hydrocarbon vent systems to monitor for explosive levels of oxygen.
    • 传感器响应于由位于测量装置中产生的测量场中的样品中与背景气体一起存在的目标成分气体(例如氧)的磁化率产生的磁风。 背景采样器还确定调节流路中的热和物理特性,并且处理器对检测到的磁风信号执行计算校正,以更精确地确定目标气体的浓度。 背景采样器包括与层流装置串联的质量流通池,以测量样品的热容量和粘性。 它从差压测量中得到气体粘度; 并且优选地确定背景气体的热容量和热导率,其组成可能是未知的,以补偿它们对磁风传感器元件的影响。 使用某些普通气体或类别的气体中的测量参数之间的一个或多个相关性来进行背景的反磁性的进一步校正。 气体体积特性的确定允许在未知的,未量化的或改变的背景组分的存在下以更高的精度制造目标气体的浓度,并且必要的硬件可以与现有的磁风传感器和处理器结合使用。 在这种情况下,修改处理器程序以应用附加的传感器输入来校正磁风读数。 还进行热导率校正,这可以直接从模式中的磁风传感器以桥梁控制信号得出,以保持恒定的温度。 该系统可用于石油储罐和碳氢化合物排放系统,以监测爆炸性的氧气。