Wavelength modulation derivative spectrometer
    1.
    发明授权
    Wavelength modulation derivative spectrometer 失效
    波长调制衍生光谱仪

    公开(公告)号:US4752129A

    公开(公告)日:1988-06-21

    申请号:US840943

    申请日:1986-03-18

    IPC分类号: G01J3/433 G01J3/18

    CPC分类号: G01J3/433

    摘要: Light to be measured is input to a diffraction grating after is has been oscillated by a wavelength modulation device with a constant frequency F. The light is incident to the diffraction grating at an angle of incidence, .theta., and is oscillated with a frequency F with a center angle of incidence, .theta..sub.0, as a center. An output spectrum of said diffraction grating is received by a photoelectric converter. An electric signal from the photoelectric converter is oscillated with a frequency F over a wavelength range of .lambda..sub.0 .+-..DELTA..lambda. where .lambda..sub.0 is a center wavelength measured at the center angle of incidence .theta..sub.0. The oscillated spectrum signal is synchronously detected, by a synchronous detector, with a frequency 2F through a high-pass filter, obtaining a variation spectrum at the measured center wavelength .lambda..sub.0. The output electric signal of the photoelectric converter passes through a DC amplifier to a sampling circuit where it is sampled with the frequency F or 2F. In this way it is possible to obtain a full intensity of a spectrum at the center wavelength .lambda..sub.0. The driving of a wavelength scanning mechanism causes a variation in the incident angle .theta..sub.0 of the light to the diffraction grating and thus a variation in the center wavelength .lambda..sub.0 measured.

    摘要翻译: 被测量的光在被恒定频率F的波长调制装置振荡之后被输入到衍射光栅。光以入射角θ入射到衍射光栅,并以频率F与 中心入射角θ0为中心。 所述衍射光栅的输出光谱由光电转换器接收。 来自光电转换器的电信号在λ0 +/-DELTAλ的波长范围上以频率F振荡,其中λ0是在中心入射角θ0处测量的中心波长。振荡的频谱信号被同步检测, 通过同步检波器,通过高通滤波器具有频率2F,在测量的中心波长λ0处获得变化谱。光电转换器的输出电信号通过DC放大器通过采样电路,其中采样电路用 频率F或2F。 以这种方式,可以在中心波长λ0处获得光谱的全部强度。波长扫描机构的驱动导致光到衍射光栅的入射角θ0的变化,因此在 中心波长λ0测量。

    Vacuum deaeration device
    2.
    发明授权
    Vacuum deaeration device 失效
    真空脱气装置

    公开(公告)号:US06755899B2

    公开(公告)日:2004-06-29

    申请号:US09881574

    申请日:2001-06-14

    申请人: Akihiko Nagai

    发明人: Akihiko Nagai

    IPC分类号: B01D1900

    CPC分类号: B01D19/0031

    摘要: This invention's object is to eliminate a possibility that both aromatic substances and olefin substances are resolved into deaerated liquid contacted with a transmission film. As a transmission film for allowing only gas to pass and preventing liquid from being passed therethrough, there is applied a product of high volatile characteristic in which dispersion liquid composed of single solution is added to particle plastic substrate to form paste material is extruded and baked.

    摘要翻译: 本发明的目的是消除将芳族物质和烯烃物质分解成与透射膜接触的脱气液体的可能性。 作为仅允许气体通过并防止液体通过的透射膜,应用高挥发性特性的产品,其中将由单一溶液组成的分散液添加到颗粒塑料基材上以形成糊料材料被挤出和烘烤。

    Solid or water quantity measurement apparatus using microwaves
    5.
    发明授权
    Solid or water quantity measurement apparatus using microwaves 失效
    使用微波的固体或水量测量仪器

    公开(公告)号:US4106329A

    公开(公告)日:1978-08-15

    申请号:US790992

    申请日:1977-04-26

    IPC分类号: G01N33/04 G01N5/04 G01N22/00

    CPC分类号: G01N22/00

    摘要: An apparatus for measuring water in cow's milk. Sample milk is heated and dryed by microwaves in an oven made of a microwave waveguide. Weights of the sample before and after the drying of the sample are measured by an automatic balance. Weight signals obtained from the balance are memorized in a memory circuit to calculate the solid material ratio or water ratio of the sample milk. A water dummy is employed for stabilizing oven temperature. Support means for one or more additional sample plates may be arranged in the waveguide for preliminary drying of one or more filter paper in the additional sample plate to shorten the subsequent heating time of the sample milk.

    摘要翻译: 一种用于测量牛奶中水分的装置。 样品牛奶在由微波波导制成的烤箱中通过微波加热和干燥。 通过自动平衡测量样品干燥之前和之后的样品重量。 将从天平获得的重量信号存储在存储器电路中以计算样品乳的固体物质比率或水分比。 采用水模拟器来稳定炉温。 可以在波导中布置用于一个或多个另外的样品板的支撑装置,用于预先干燥附加样品板中的一个或多个滤纸,以缩短样品乳的后续加热时间。