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    Apparatus for flame discrimination utilizing long wavelength pass filters and related method
    22.
    发明专利
    Apparatus for flame discrimination utilizing long wavelength pass filters and related method 未知

    公开(公告)号：NZ597524A

    公开(公告)日：2014-01-31

    申请号：NZ59752410

    申请日：2010-05-20

    Applicant: POLARIS SENSOR TECHNOLOGIES INC

    Inventor： HARCHANKO JOHNATHAN SAMUEL

    IPC: G01J5/02 ,  F23N5/08

    Abstract: 597524 Disclosed is a flame detection apparatus (100). The apparatus (100) includes a first optical sensor (101) with a first long wave pass filter (111), having a first spectral response and a second optical sensor (103) with a second long wave pass filter (113) having a second spectral response. A third optical sensor (105) with a third long wave pass filter (115) is included and has a third spectral response. The third spectral response is a subset of the second response, and the second response is a subset of the first spectral response.

    Passive infrared analysis gas sensors and applicable multichannel detector assemblies
    27.
    发明专利
    Passive infrared analysis gas sensors and applicable multichannel detector assemblies 未知

    公开(公告)号：AU1431497A

    公开(公告)日：1997-08-01

    申请号：AU1431497

    申请日：1996-12-26

    Applicant: ENGELHARD SENSOR TECHNOLOGIES INC

    Inventor： WONG JACOB Y

    IPC: G01J3/10 ,  G01J1/08 ,  G01N21/35 ,  G01N21/61

    Abstract: Multichannel infrared detector assemblies for use in the detection and monitoring of gas concentrations are provided. The detector assemblies include a detector housing having a port for receiving infrared radiation therethrough; a substrate mounted within the detector housing, the substrate having three apertures therein to transmit radiation entering the detector assembly therethrough; a first, a second and a third thermopile detector fabricated on the bottom side of the substrate, the hot junctions of each thermopile detector positioned over one of the apertures in the substrate so as to receive radiation transmitted through the aperture, and the cold junctions of each thermopile detector positioned over the substrate; a first interference bandpass filter mounted on the top side of the substrate so that the first filter covers the aperture above the first detector and the first filter is interposed between the port and the first detector, the first interference bandpass filter designed to pass incident radiation at a first spectral band; a second interference bandpass filter mounted on the top side of the substrate so that the second filter covers the aperture above the second detector and the second filter is interposed between the port and the second detector, the second interference bandpass filter designed to pass radiation at a second spectral band; and a third interference bandpass filter mounted on the top side of the substrate so that the third filter covers the aperture above the third detector and the third filter is interposed between the port and the third detector, the third interference bandpass filter designed to pass radiation at a third spectral band. The disclosed infrared detector assemblies can be used in traditional NDIR gas sensors having an active source or in passive infrared analysis gas sensors which use a passive infrared temperature source and the space between the detector assembly and the source as the sample chamber.

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