中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

20 records (took 0.021 seconds)

    INFRARED GAS ANALYZER WITH AUTOMATIC ZERO ADJUSTMENT.
    19.
    发明公开
    INFRARED GAS ANALYZER WITH AUTOMATIC ZERO ADJUSTMENT. 失效
    具有自动校零SETTING IR气体分析仪。

    公开(公告)号：EP0253872A4

    公开(公告)日：1990-04-10

    申请号：EP87900946

    申请日：1987-01-09

    Applicant: ANDROS ANALYZERS INC

    Inventor： PASSARO ROBERT EUGENE ,  ROGERS RAYMOND EARL ,  GRIFFITH CRAIG JAMES

    IPC: G01J1/44 ,  G01N21/27 ,  G01N21/31 ,  G01N21/35

    CPC classification number: G01N21/274 ,  G01N21/3504 ,  G01N2021/3159 ,  G01N2021/3166 ,  G01N2201/126 ,  G01N2201/1273 ,  G01N2201/12769

    Abstract: Automatic zeroing apparatus zeroes an infrared gas analyzer automatically upon the occurrence of preselected conditions to indicate zero in the absence of absorption of infrared radiation by a gas mixture being analyzed. The gas analyzer has a sample cell (11) for containing a gas mixture to be analyzed. Infrared radiation directed through the sample cell (11) is detected at a preselected wavelength to produce a detection signal. A signal processor outputs a signal systematically related to the difference between the detection signal and a reference signal. For zeroing the sample cell (11) is filled with gas substantially nonabsorbent of infrared radiation at the respective characteristic wavelength. A comparator produces an error signal when the output signal differs from zero. A gain control (DAC 21) automatically controls the signal level of the detection signal to reduce the output signal substantially to zero with the nonabsorbent gas filling the sample cell (11). The preselected conditions may include the passage of a predetermined time and a temperature drift beyond a predetermined limit.

    DIGITAL ANESTHETIC AGENT ANALYZER.
    20.
    发明公开
    DIGITAL ANESTHETIC AGENT ANALYZER. 失效
    数字分析装置用于麻醉剂。

    公开(公告)号：EP0241522A4

    公开(公告)日：1989-10-16

    申请号：EP86906219

    申请日：1986-10-10

    Applicant: ANDROS ANALYZERS INC

    Inventor： PARNOFF GEORGE KENNETH ,  PASSARO ROBERT EUGENE ,  ROGERS RAYMOND EARL ,  WILLIAMS KEVIN GRAHAM

    IPC: G01N21/31 ,  G01N21/35 ,  G01N21/37 ,  G01N21/61

    CPC classification number: G01N21/3504 ,  G01N21/314 ,  G01N2021/3129 ,  G01N2201/127 ,  G01N2201/12723

    Abstract: A gaz analyzer comprising a sample cell (21) for containing a gas mixture to be analyzed, a source (11) for producing and directing infrared energy through the sample cell, a rotary filter wheel (17) having at least one filter thereon for passing infrared energy limited to a wavelength band within the characteristic absorption band of a predetermined gas and having a dark level region substantially opaque to infrared energy, a drive (19, 20) for supporting and rotating the filter wheel to successively interpose the filter and the dark level region between the source and the sample cell in the path (13) of the infrared energy directed by the source, a detector (15) for detecting infrared energy passing through the sample cell and producing an electrical signal representative thereof, and a signal processor (24) connected to the detector means for producing an output indicating the concentration of the predetermined gas in the sample cell by comparing the electrical signals produced by the detector with the filter positioned in the infrared energy path and with the dark level region positioned in the infrared energy path. The dark level region has a substantially fully reflective surface oriented toward the sample cell (21) when positioned in the infrared energy path whereby infrared energy impinging thereon is reflected.

Patent Agency Ranking