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    • 62. 发明授权
    • Thermostatic fiber optic waveguides
    • 恒温光纤波导
    • US4505542A
    • 1985-03-19
    • US422481
    • 1982-09-23
    • Raymond Clarke
    • Raymond Clarke
    • G01K3/00G01K11/32G01M3/00G01M3/04G02B5/172
    • G01M3/047G01K11/32G01K3/00G01M3/002
    • Fiber optic waveguides exhibiting a blackout phenomenon can be used for temperature sensing. A temperature sensing waveguide can be used in such applications as maintaining a material within a selected temperature range, freeze protection, viscosity control of liquids in pipelines, leak detection of cryogenic fluids, fire detection, application of heat-recoverable materials, and fluid level detection. Novel waveguides exhibiting blackout at selected temperatures for use in these applications are described. Among the novel waveguides are those having a cladding comprising a polyalkylphenyl siloxane and those having a cladding comprising a cross-linked polymethylalkyl siloxane. Also described are waveguides where only a section of the waveguide exhibits blackout and methods for making such waveguides.
    • 表现出停电现象的光纤波导可用于温度检测。 温度感测波导可以用于将材料保持在所选温度范围内的应用,冻结保护,管道中的液体的粘度控制,低温流体的泄漏检测,火灾探测,热可回收材料的应用和液面检测 。 描述了在这些应用中使用的在选定温度下显示停电的新型波导。 在这些新颖的波导中,具有包含聚烷基苯基硅氧烷的包层和具有包含交联的聚甲基烷基硅氧烷的包层的那些。 还描述了仅波导部分显示停电的波导和用于制造这种波导的方法。
    • 65. 发明授权
    • Apparatus for detecting oils and the like
    • 用于检测油等的装置
    • US4159420A
    • 1979-06-26
    • US859461
    • 1977-12-12
    • Akiyoshi Tsunoda
    • Akiyoshi Tsunoda
    • G01M3/38G01F23/292G01M3/04G01F23/00G02B5/14G08B21/00
    • G01M3/047G01F23/2921
    • An improved apparatus suitable for detecting the outflow of a liquid such as petroleum or the like and petrochemical products from a storage tank or pipe line thereof is disclosed. The detecting apparatus comprises a detecting element including a light transmitting path made of a transparent solid material having a refractive index larger than the refractive index of water through which the light is transmitted from a light source to a light detector. If the peripheral wall surface of the light transmitting path is wetted with a liquid to be detected which has a larger refractive index than the material forming the light transmitting path, the light being transmitted through the path leaks out of the path at the wetted area of the peripheral wall surface due to the difference of the refractive index between the liquid and the path. Therefore, the presence of the liquid to be detected contacting with the light transmitting path can be detected by detecting a change in the quantity of the light which has passed through the path.
    • 公开了一种适用于检测液体如石油等的流出物和来自储罐或其管线的石化产品的改进装置。 该检测装置包括检测元件,该检测元件包括由透明固体材料制成的透光路径,该透明固体材料的折射率大于光从光源传输到光检测器的水的折射率。 如果透光路径的周壁表面被具有比形成光传输路径的材料的折射率更大的待检测液体润湿,则透过该路径的光在湿润区域 由于液体和路径之间的折射率的差异导致的周壁表面。 因此,可以通过检测通过路径的光量的变化来检测与光传输路径接触的待检测液体的存在。