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    • 4. 发明申请
    • INFRARED CHEMICAL VAPOR DETECTOR AND METHOD
    • 红外线化学气相探测器和方法
    • WO1993011424A1
    • 1993-06-10
    • PCT/US1992010401
    • 1992-12-03
    • LOCKHEED SANDERS, INC.
    • LOCKHEED SANDERS, INC.SPADE, Gerald, L.LABITT, Bruce, D.
    • G01N21/35
    • G01N21/3518G01J2003/1234G01N2021/3531G01N2201/12723
    • The invention relates to the remote infrared radiometric detection of chemical vapors (20). Air quality and substance control concerns present a need for more efficient ways of detecting the presence of select chemical vapors (20) in the atmosphere. A method and apparatus for such a detector includes elements for filtering (26, 34) collected infrared energy over a filter bandwidth by bandpass filtering only a fractional bandwidth of the filter bandwidth at any one time and repeatedly scanning the filter bandwidth with the passed fractional bandwidth. Also included are elements for measuring infrared energy (32) passed by the bandpass filtering thereby producing an output signal and for repeatedly nulling (40) the output signal in relation to the repeated scanning of the filter bandwidth. The invention is applicable to air monitoring including pollution control, chemical detection and the detection of any substances which provide telltale chemical vapors (20).
    • 本发明涉及化学蒸汽(20)的远程红外辐射检测。 空气质量和物质控制问题需要更有效的方式来检测大气中选择的化学气体(20)的存在。 用于这种检测器的方法和装置包括用于通过在任何一个时间仅对滤波器带宽的分数带宽进行带通滤波来过滤(26,34)在滤波器带宽上收集的红外能量的元件,并用传递的分数带宽重复地扫描滤波器带宽 。 还包括用于测量通过带通滤波的红外能量(32)的元件,从而产生输出信号,并且用于相对于滤波器带宽的重复扫描重复使(40)输出信号归零(40)。 本发明适用于空气监测,包括污染控制,化学检测和检测任何提供化学气体的物质(20)。