Fiber optic chemical sensor
    41.
    发明授权
    Fiber optic chemical sensor 失效
    光纤化学传感器

    公开(公告)号:US5315672A

    公开(公告)日:1994-05-24

    申请号:US764257

    申请日:1991-09-23

    CPC classification number: G01N21/7703 G01N2201/0873

    Abstract: A fiber optic sensor for detecting the presence or concentration of particular chemical or biological species in a zone to be monitored has light-emitting and detecting elements such as a gallium arsenide light-emitting diode and a Schottky diode light detector provided in a semiconductor body, and has an optical fiber formed in situ on a surface of the body to conduct light from the light-emitting diode to the detector. The fiber has a long light-transmitting core of a material such as silicon dioxide deposited on a semiconductor body surface and defined by photolithographic techniques and has a cladding deposited over and around the core of a material of relatively lower refractive index than the core. The cladding material reacts when contacted by the particular chemical or biological species to produce measurable changes in transmission of light through the fiber so that the detector provides an electrical signal representative of the presence or concentration of the species.

    Abstract translation: 用于检测待监测区域中特定化学或生物物质的存在或浓度的光纤传感器具有发光和检测元件,例如设置在半导体主体中的砷化镓发光二极管和肖特基二极管光检测器, 并且在本体的表面上具有原位形成的光纤,以将来自发光二极管的光导入检测器。 光纤具有长的透光芯,例如沉积在半导体主体表面上的二氧化硅的材料,并通过光刻技术限定,并且具有沉积在比芯更低折射率的材料的芯上和周围的包层。 包层材料在被特定的化学或生物物质接触时反应,以产生通过纤维的光的透射变化,使得检测器提供代表物种的存在或浓度的电信号。

    METHOD AND SYSTEM FOR PREDICTING PROPERTIES OF ROCK SAMPLES USING THERMAL SENSING AND MACHINE LEARNING

    公开(公告)号:US20240361264A1

    公开(公告)日:2024-10-31

    申请号:US18309692

    申请日:2023-04-28

    Abstract: A method may include determining a thermal signal for a thermal analysis of a rock sample. The method may further include transmitting various commands to various thermal sources to produce various heat emissions. A respective command among the commands may cause a respective thermal source among the thermal sources to produce a respective heat emission based on the thermal signal. The method further includes determining distributed temperature data of the rock sample using various distributed temperature sensors in response to producing the heat emissions. The distributed temperature sensors may be coupled to the rock sample on a first rock surface and a second rock surface. The first rock surface may be on an opposite side of the rock sample from the second rock surface. The method may further include determining predicted thermal property data of the rock sample using the distributed temperature data and a machine-learning model.

    LAB-ON-A-CHIP SYSTEM WITH FUNCTIONALIZED WAVEGUIDE

    公开(公告)号:US20240035975A1

    公开(公告)日:2024-02-01

    申请号:US18265361

    申请日:2021-12-17

    CPC classification number: G01N21/645 G01N2201/0873 G01N2021/0346

    Abstract: A lab-on-a-chip system (100) comprises an optical detection waveguide (122) that has an at least partially periodic structure (123, 501, 502, 503, 504) that is configured to couple light (152) from surroundings of the optical detection waveguide (122) into the optical detection waveguide (122). The lab-on-a-chip system (100) furthermore also comprises a microfluidic network (212), wherein the microfluidic network (212) has multiple lines and at least one reaction chamber (211, 211-1, 211-2, 211-3).

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