公开(公告)号：US09816973B2

公开(公告)日：2017-11-14

申请号：US14592656

申请日：2015-01-08

Applicant: Nathaniel J. Peterson ,  Yoav Barshad

Inventor： Nathaniel J. Peterson ,  Yoav Barshad

IPC: G01N30/74 ,  G01N33/00 ,  G01N1/40 ,  G01N21/85 ,  G01N30/12 ,  G01N21/64

CPC classification number: G01N33/0004 ,  G01N1/405 ,  G01N1/4055 ,  G01N21/85 ,  G01N30/12 ,  G01N2001/4066 ,  G01N2021/6417 ,  G01N2021/8578

Abstract: A system and method for compositional analysis of a process stream in an industrial process transports a liquid process stream through an absorption/desorption packed column (A/D column), along with a carrier gas. A gas phase combination of the carrier gas and one or more solutes from the liquid process stream is passed out of the A/D column to a flow cell for analysis by an analyzer to determine presence and concentration of the one or more solutes within the gas phase. A processor uses the concentration of the solutes within the gas phase to perform a headspace analysis to determine the concentration of the solutes in the process stream.

公开(公告)号：US5416579A

公开(公告)日：1995-05-16

申请号：US278292

申请日：1994-07-21

Applicant: Yoav Barshad ,  Yael S. Barshad

Inventor： Yoav Barshad ,  Yael S. Barshad

IPC: G01N21/55 ,  G01J3/42

CPC classification number: G01N21/552

Abstract: A method for analyzing fluids, particularly the solute concentration in liquids which are dense or viscous and are only slightly transparent to light, which utilizes an attenuated total reflectance cell with a curved-path optical wave guide, particularly an optical fiber, the wave guide having a portion of its surface interfacing with the fluid to be analyzed. The wave guide has selected dimensions and properties including bend radius, waveguide radius, index of refraction, and effective light path which optimize the measurement. The optimum wave guide dimensions and wavelength of light are selected through calibration of the ATR device with a plurality of fluids of known composition. Light is transmitted through the wave guide and is attenuated by partial reflectance within the wave guide due to absorbance by the fluid being analyzed. The attenuated transmittance is related to optical absorbance, which is correlated directly to concentration of solute.

Abstract translation: 一种用于分析液体的方法，特别是致密或粘稠且仅对光轻微透明的液体中的溶质浓度，其利用具有弯曲路径光波导（特别是光纤）的衰减全反射率单元，波导具有 其表面的一部分与要分析的流体接合。 波导选择尺寸和性能，包括弯曲半径，波导半径，折射率和有效光路，优化了测量。 通过具有已知组成的多种流体的ATR装置的校准来选择光的最佳波导尺寸和波长。 光通过波导传播，并且由于被分析的流体的吸光度而被波导内的部分反射率衰减。 衰减的透射率与光吸收率有关，其与溶质的浓度直接相关。

公开(公告)号：US5621213A

公开(公告)日：1997-04-15

申请号：US499806

申请日：1995-07-07

Applicant: Yoav Barshad

Inventor： Yoav Barshad

IPC: G01N21/33 ,  G01J3/32 ,  G01J3/42

CPC classification number: G01N21/33

Abstract: A stack gas monitor system has an optimized gas flow portion which is permanently installed in a fossil fuel burning facility, and to which a spectrophotometric portion can be readily coupled for real-time determination in the system of a concentration of a first gas having a characteristic absorption spectrum and which is selectably introducible as a measured amount into a stack gas stream. A sample of the stack gas stream is flowing through the gas flow portion, with at least one gas of the sample stream having an absorption spectrum extending within an ultraviolet range of wavelengths of radiation and having absorbance values within this range which are higher than absorbance values of the first gas. The system can be purged and can be calibrated with the first gas. Stack gas blank data are obtained in the absence of the first gas. Composite gas data are provided upon introduction of the first gas into the stack gas. Absorbance values for the first gas in the composite gas are calculated, and first gas concentration levels are determined and are monitored on a periodic basis.

Abstract translation: 堆叠气体监测系统具有优化的气体流动部分，其永久地安装在化石燃料燃烧设备中，并且分光光度部分可以容易地连接到该分光光度部分上以便系统中实时测定具有特征的第一气体的浓度 吸收光谱，并且其可选择地作为测量量引入到堆叠气流中。 堆气流的样品流过气流部分，其中样品流的至少一种气体具有在辐射波长的紫外范围内延伸的吸收光谱，并且在该范围内的吸光度值高于吸光度值 的第一种气体。 系统可以清洗，可以用第一种气体进行校准。 在不存在第一气体的情况下获得堆积气体空白数据。 当将第一气体引入到堆叠气体中时，提供复合气体数据。 计算复合气体中第一气体的吸光度值，并确定第一气体浓度水平并定期监测。

公开(公告)号：US4732476A

公开(公告)日：1988-03-22

申请号：US759291

申请日：1985-07-26

Applicant: Yoav Barshad

Inventor： Yoav Barshad

IPC: G01J3/06 ,  G01J3/18 ,  G01J3/28

CPC classification number: G01J3/06 ,  G01J3/2889 ,  G01J3/1838

Abstract: An improved rapid-scan spectrophotometer with an optical grating continuously rotating at a constant angular velocity. An optical trigger actuated by the rotating turntable supporting the grating, actuates an analog to digital converter to sample at discrete times an output signal from the sample detector over the desired wavelength range and to store the digitized information in a direct memory access (DMA) buffer. The information may be retrieved as desired from the buffer for further processing or permanent data storage. With each revolution of the optical grating, the range (typically 15.degree.) of wavelengths from the grating that provides useful information is sampled by the analog to digital converter and stored in the buffer. Because the grating is continuously rotating at a constant angular velocity and is not limited by the inertia of optical components, the spectrophotometer can be operated at a much higher scanning speed than an oscillating or vibrating grating spectrophotometer.

Abstract translation: 一种改进的快速扫描分光光度计，其光栅以恒定角速度连续旋转。 由支撑光栅的旋转转盘启动的光学触发器致动模数转换器，以在离散时间对来自样品检测器的所需波长范围的输出信号进行采样，并将数字化信息存储在直接存储器存取（DMA）缓冲器 。 可以根据需要从缓冲器中检索信息以用于进一步处理或永久数据存储。 随着光栅的每次旋转，来自提供有用信息的光栅的波长范围（通常为15°）由模数转换器采样并存储在缓冲器中。 因为光栅以恒定的角速度连续旋转，并且不受光学部件的惯性的限制，所以分光光度计可以以比振荡或振动光栅分光光度计高得多的扫描速度运行。

公开(公告)号：US06204919B1

公开(公告)日：2001-03-20

申请号：US08096106

申请日：1993-07-22

Applicant: Yoav Barshad ,  Yael Barshad

Inventor： Yoav Barshad ,  Yael Barshad

IPC: G01J328

CPC classification number: G01N21/31 ,  G01J3/02 ,  G01J3/0218 ,  G01J3/0286 ,  G01J3/42 ,  G01N21/05

Abstract: A spectrometer includes a light source, a fiber optic bundle with a first and second leg, where the first leg has more fibers than the second leg, a flow cell, focusing optics, a disperser, and a detector. The spectrometer may also include a mask and system electronics to control the spectrometer. The spectrometer allows for simultaneous dual analysis of a reference and sample beam and minimizes errors and attenuations in the signals. The elimination of mechanical moving parts and control of attenuation losses enables less sophisticated control electronics to be utilized.

Abstract translation: 光谱仪包括光源，具有第一和第二支腿的光纤束，其中第一支腿具有比第二支腿更多的光纤，流动池，聚焦光学元件，分散器和检测器。 光谱仪还可以包括用于控制光谱仪的掩模和系统电子装置。 光谱仪允许同时对参考和采样光束进行双重分析，并最大限度地减少信号中的误差和衰减。 机械运动部件的消除和衰减损耗的控制使得可以利用较不复杂的控制电路。

公开(公告)号：US4804266A

公开(公告)日：1989-02-14

申请号：US8544

申请日：1987-01-29

Applicant: Yoav Barshad

Inventor： Yoav Barshad

IPC: G01J3/02 ,  G01J1/44 ,  G01J3/04 ,  G01J3/06 ,  G01J3/18 ,  G01J3/28 ,  G01J3/42

CPC classification number: G01J3/06 ,  G01J3/2889 ,  G01J2001/444 ,  G01J2003/062 ,  G01J2003/066 ,  G01J2003/2866 ,  G01J3/1838

Abstract: A system for rapid-scan spectral analysis comprising a concave holographic diffraction grating continuously rotated at a substantially constant angular velocity to provide a rapid scanning monochromator (a monochromator is used to transfer nominal regions of wavelengths out of the continuous light source). The unique sampling circuitry uses an optical shaft encoder. The angular velocity and angular acceleration of the grating are calculated from time measurements, just before the first wavelength of interest falls on the detector. This information is used to control the Analog to Digital converter sampling rate across the region of interest. The samples as a function of time are stored in a memory buffer so that each data point corresponds to a wavelength.

Abstract translation: 一种用于快速扫描光谱分析的系统，包括以基本上恒定的角速度连续旋转的凹面全息衍射光栅，以提供快速扫描单色仪（使用单色仪将标称的波长区域转移出连续光源）。 独特的采样电路采用光轴编码器。 光栅的角速度和角加速度由时间测量计算，就在感兴趣的第一波长落在检测器之前。 该信息用于控制整个感兴趣区域的模数转换器采样率。 作为时间的函数的样本被存储在存储器缓冲器中，使得每个数据点对应于波长。