SPECTROSCOPIC SENSOR FOR MEASURING SHEET PROPERTIES
    1.
    发明申请
    SPECTROSCOPIC SENSOR FOR MEASURING SHEET PROPERTIES 审中-公开
    用于测量板材性能的光谱传感器

    公开(公告)号:WO2007078949A3

    公开(公告)日:2007-10-18

    申请号:PCT/US2006048491

    申请日:2006-12-19

    Abstract: A spectroscopic sensor for measuring flat sheet product is disclosed. The disclosed sensor uses a combination of spectrometers and single-channel detectors and filters together with a broadband source of illumination to optimally measure multiple properties of a flat sheet product. A spectrometer is used to measure over a spectral range where an easily configurable set of wavelength channels is needed and where the signal-to-noise ratios and spectral resolutions of the channels are consistent with the spectral range and number of pixels of the spectrometer; while one or more single channel detector and filter combinations are used to measure, with high signal-to- noise ratio, at specific wavelengths within or outside the spectral range of the spectrometer(s). Therefore, the single channel detectors can be used to complement the information provided by a spectrometer or to extend the working range of a spectrometer by providing single wavelength measurements anywhere in the visible, near-IR or mid-IR spectral regions.

    Abstract translation: 公开了一种用于测量平板产品的光谱传感器。 所公开的传感器使用光谱仪和单通道检测器和滤波器的组合以及宽带光源来最佳地测量平板产品的多个性质。 光谱仪用于在光谱范围内测量,其中需要容易配置的一组波长信道,并且其中信道的信噪比和光谱分辨率与光谱仪的光谱范围和像素数量一致; 而一个或多个单通道检测器和滤波器组合用于以高信噪比测量在分光器的光谱范围内或外的特定波长。 因此,可以使用单通道检测器来补充光谱仪提供的信息,或通过在可见光,近红外或中红外光谱区域中的任何地方提供单个波长测量来扩展光谱仪的工作范围。

    MULTI-SOURCE SENSOR FOR ONLINE CHARACTERIZATION OF WEB PRODUCTS AND RELATED SYSTEM AND METHOD

    公开(公告)号:CA2856762A1

    公开(公告)日:2013-06-13

    申请号:CA2856762

    申请日:2012-12-04

    Abstract: A system includes a first sensor unit having multiple solid-state light sources (202a-202n) each configured to generate light at one or more wavelengths, where different light sources are configured to generate light at different wavelengths. The first sensor unit also includes a mixer (204, 302a-302n, 304, 402a-402m) configured to mix the light from the light sources and to provide the mixed light to a web (108) being sampled. The first sensor unit further includes a controller (258a) configured to control the generation of the light by the light sources. The system also includes a second sensor unit comprising a detector (206) configured to measure mixed light that has interacted with the web. The second sensor unit could also include a second controller (258b) configured to determine one or more characteristics of the web (such as moisture content and fiber weight) using measurements from the detector.

    SPECTROSCOPY HAVING CORRECTION FOR BROADBAND DISTORTION FOR ANALYZING MULTI-COMPONENT SAMPLES

    公开(公告)号:CA2757192A1

    公开(公告)日:2010-10-07

    申请号:CA2757192

    申请日:2010-03-29

    Abstract: A spectroscopic method (100) and spectroscopy system (200) therefrom for analyzing samples (298). A sample includes a first chemical component that has a characteristic first absorption peak is provided (101). The sample is irradiated (102) in a measurement waveband proximate to the first absorption peak, and at a first and a second reference waveband where the first chemical component lacks characteristic absorption features. Reflected or transmitted detection data is obtained (103) including a measured power proximate to the first absorption peak and first and second reference powers at the reference wavebands. A plurality of different waveband ratios are evaluated (104) using pairs of detection data to generate a plurality of measured waveband ratio values. A parameter of the first chemical component is then determined (105) by evaluating a multidimensional polynomial calibration equation that relates the parameter of the first chemical component to the plurality of different waveband ratios by substituting the measured waveband ratio values into the calibration relation.

    SPECTROSCOPIC SENSOR FOR MEASURING SHEET PROPERTIES

    公开(公告)号:CA2635705C

    公开(公告)日:2016-01-26

    申请号:CA2635705

    申请日:2006-12-19

    Abstract: A spectroscopic sensor for measuring flat sheet product is disclosed. The disclosed sensor uses a combination of spectrometers and single-channel detectors and filters together with a broadband source of illumination to optimally measure multiple properties of a flat sheet product. A spectrometer is used to measure over a spectral range where an easily configurable set of wavelength channels is needed and where the signal-to-noise ratios and spectral resolutions of the channels are consistent with the spectral range and number of pixels of the spectrometer; while one or more single channel detector and filter combinations are used to measure, with high signal-to-noise ratio, at specific wavelengths within or outside the spectral range of the spectrometer(s). Therefore, the single channel detectors can be used to complement the information provided by a spectrometer or to extend the working range of a spectrometer by providing single wavelength measurements anywhere in the visible, near-IR or mid-IR spectral regions.

    APPARATUS AND METHOD FOR MONITORING AUTOTROPH CULTIVATION

    公开(公告)号:CA2842261A1

    公开(公告)日:2013-02-07

    申请号:CA2842261

    申请日:2012-05-16

    Abstract: A method includes identifying (508) a chlorophyll concentration per optical density parameter (CCpOD) value (408) using a chlorophyll concentration measurement (504) of an autotroph culture (104) and an optical density measurement (506) of the autotroph culture. The method also includes identifying (510) a change in the autotroph culture using the CCpOD value. The change in the autotroph culture can be identified by determining whether the CCpOD value falls outside upper (404) and lower (406) control limits. The upper and lower control limits can be identified using a specified number of previously-determined CCpOD values, which can be calculated when the autotroph culture is in a known healthy state. Multiple CCpOD values can be calculated, and an alarm (120) can be generated if a specified number of the CCpOD values (such as one or more) fall outside the upper and lower control limits.

    FUEL CLOUD POINT OR FREEZE POINT SENSOR WITH COLLINEAR OPTICAL GEOMETRY

    公开(公告)号:CA2807868C

    公开(公告)日:2018-07-31

    申请号:CA2807868

    申请日:2011-08-15

    Abstract: A system includes a sensing cell (102) having a walled structure (108) configured to receive a fuel sample within an interior space (110) of the walled structure. The sensing cell also has at least one cooling surface (124-126) located on at least a portion of the walled structure and configured to cool the fuel sample. The sensing cell further has an optical port (116) configured to couple to one or more optical fibers (118-120, 304) and to provide first radiation to the fuel sample. In addition, the sensing cell has a mirror (122) configured to reflect the first radiation in order to provide second radiation to the optical port. The optical port defines a collinear optical geometry for providing the first radiation to the fuel sample and receiving the second radiation through the fuel sample. The system also includes at least one cooler (128) configured to cool the fuel sample in the sensing cell by cooling the at least one cooling surface.

    SPECTROSCOPY HAVING CORRECTION FOR BROADBAND DISTORTION FOR ANALYZING MULTI-COMPONENT SAMPLES

    公开(公告)号:CA2757192C

    公开(公告)日:2017-06-20

    申请号:CA2757192

    申请日:2010-03-29

    Abstract: A spectroscopic method (100) and spectroscopy system (200) therefrom for analyzing samples (298). A sample includes a first chemical component that has a characteristic first absorption peak is provided (101). The sample is irradiated (102) in a measurement waveband proximate to the first absorption peak, and at a first and a second reference waveband where the first chemical component lacks characteristic absorption features. Reflected or transmitted detection data is obtained (103) including a measured power proximate to the first absorption peak and first and second reference powers at the reference wavebands. A plurality of different waveband ratios are evaluated (104) using pairs of detection data to generate a plurality of measured waveband ratio values. A parameter of the first chemical component is then determined (105) by evaluating a multidimensional polynomial calibration equation that relates the parameter of the first chemical component to the plurality of different waveband ratios by substituting the measured waveband ratio values into the calibration relation.

    SENSOR FOR EARLY DETECTION OF PROBLEMS IN ALGAE CULTURES AND RELATED SYSTEM AND METHOD

    公开(公告)号:CA2874533A1

    公开(公告)日:2013-12-27

    申请号:CA2874533

    申请日:2013-05-23

    Abstract: A method includes measuring (304, 404) intensities of light passing through a sample (102) of an algae culture at different wavelengths. The method also includes identifying (204-206, 312, 416), using the measured intensities, a peak absorption wavelength of at least one type of chlorophyll in the sample and/or an absorption ratio involving multiple types of chlorophyll in the sample. The method further includes determining (210) whether the algae culture has a problem using the peak absorption wavelength and/or the absorption ratio. The peak absorption wavelength could be identified by identifying a specified wavelength at which a smallest amount of light passes through the sample. The absorption ratio could be identified by identifying (412) an average absorption wavelength of first and second types of chlorophyll in the sample and identifying (312) a peak absorption wavelength of the first type of chlorophyll.

    DIFFUSING MEASUREMENT WINDOW FOR NEAR AND MID IR MULTICHANNEL SENSOR

    公开(公告)号:CA2836633A1

    公开(公告)日:2012-12-13

    申请号:CA2836633

    申请日:2012-06-04

    Abstract: A diffuse reflector of radiation in the near and mid infrared regions includes (i) an assembly that has a reflecting element and a diffusing element that is made of one or more layers of calcium fluoride, sapphire, or alumina; or (ii) a diffusively reflective surface configured as a metallic layer with a rough surface. The diffuse reflector can be incorporated into systems for measuring properties of sheet materials and particularly into optical sensors that include a measurement window configured with one or more of the diffuse reflectors that cause incident radiation from a sensor light source to be diffused and reflected a plurality of times within a layer of material before being detected by the sensor receiver.

    APPARATUS AND METHOD FOR CONTROLLING AUTOTROPH CULTIVATION

    公开(公告)号:CA2822930A1

    公开(公告)日:2012-07-12

    申请号:CA2822930

    申请日:2012-01-04

    Abstract: A method includes receiving (410) at least one measurement of a dissolved carbon dioxide concentration of a mixture of fluid containing an autotrophic organism. The method also includes determining (420) an adjustment to one or more manipulated variables using the at least one measurement. The method further includes generating (430) one or more signals to modify the one or more manipulated variables based on the determined adjustment. The one or more manipulated variables could include a carbon dioxide flow rate, an air flow rate, a water temperature, and an agitation level for the mixture. At least one model (214) relates the dissolved carbon dioxide concentration to one or more manipulated variables, and the adjustment could be determined by using the at least one model to drive the dissolved carbon dioxide concentration to at least one target that optimize a goal function. The goal function could be to optimize biomass growth rate, nutrient removal and/or lipid production.

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