公开(公告)号：PL2630470T3

公开(公告)日：2017-09-29

申请号：PL11791077

申请日：2011-10-21

Applicant: SPECTRASENSORS INC

Inventor： LIU XIANG ,  LEWISON JOHN ,  JI WENHAI ,  FEITISCH ALFRED

IPC: G01N21/35 ,  G01J3/28 ,  G01J3/42 ,  G01N21/03 ,  G01N21/27 ,  G01N21/31 ,  G01N21/3504 ,  G01N21/3518 ,  G01N21/39 ,  G01N21/61

公开(公告)号：AU2011316820B2

公开(公告)日：2015-07-23

申请号：AU2011316820

申请日：2011-10-21

Applicant: SPECTRASENSORS INC

Inventor： LIU XIANG ,  LEWISON JOHN ,  JI WENHAI ,  FEITISCH ALFRED

IPC: G01N21/35 ,  G01N21/31 ,  G01N21/39 ,  G01N21/61

Abstract: A reference harmonic absorption curve of a laser absorption spectrometer, which can include a tunable or scannable laser light source and a detector, can have a reference curve shape and can include a first, second, or higher order harmonic signal of a reference signal generated by the detector in response to light passing from the laser light source through a reference gas or gas mixture. The reference gas or gas mixture can include one or more of a target analyte and a background gas expected to be present during analysis of the target analyte. The reference harmonic absorption curve can have been determined for the laser absorption spectrometer in a known or calibrated state. A test harmonic absorption curve having a test curve shape is compared with the reference harmonic absorption curve to detect a difference between the test curve shape and the reference curve shape that exceeds a predefined allowed deviation and therefore indicates a change in an output of the laser light source relative to the known or calibrated state. One or more operating and/or analytical parameters of the laser absorption spectrometer are adjusted to correct the test curve shape to reduce the difference between the test curve shape and the reference curve shape.

公开(公告)号：AU2011316820A1

公开(公告)日：2013-05-09

申请号：AU2011316820

申请日：2011-10-21

Applicant: SPECTRASENSORS INC

Inventor： LIU XIANG ,  LEWISON JOHN ,  JI WENHAI ,  FEITISCH ALFRED

IPC: G01N21/35 ,  G01N21/31 ,  G01N21/39 ,  G01N21/61

Abstract: A reference harmonic absorption curve of a laser absorption spectrometer, which can include a tunable or scannable laser light source and a detector, can have a reference curve shape and can include a first, second, or higher order harmonic signal of a reference signal generated by the detector in response to light passing from the laser light source through a reference gas or gas mixture. The reference gas or gas mixture can include one or more of a target analyte and a background gas expected to be present during analysis of the target analyte. The reference harmonic absorption curve can have been determined for the laser absorption spectrometer in a known or calibrated state. A test harmonic absorption curve having a test curve shape is compared with the reference harmonic absorption curve to detect a difference between the test curve shape and the reference curve shape that exceeds a predefined allowed deviation and therefore indicates a change in an output of the laser light source relative to the known or calibrated state. One or more operating and/or analytical parameters of the laser absorption spectrometer are adjusted to correct the test curve shape to reduce the difference between the test curve shape and the reference curve shape.

公开(公告)号：CA2831773A1

公开(公告)日：2012-04-26

申请号：CA2831773

申请日：2011-10-21

Applicant: SPECTRASENSORS INC

Inventor： LIU XIANG ,  LEWISON JOHN ,  JI WENHAI ,  FEITISCH ALFRED

IPC: G01N21/35 ,  G01N21/31 ,  G01N21/39 ,  G01N21/61

Abstract: A reference harmonic absorption curve of a laser absorption spectrometer, which can include a tunable or scannable laser light source and a detector, can have a reference curve shape and can include a first, second, or higher order harmonic signal of a reference signal generated by the detector in response to light passing from the laser light source through a reference gas or gas mixture. The reference gas or gas mixture can include one or more of a target analyte and a background gas expected to be present during analysis of the target analyte. The reference harmonic absorption curve can have been determined for the laser absorption spectrometer in a known or calibrated state. A test harmonic absorption curve having a test curve shape is compared with the reference harmonic absorption curve to detect a difference between the test curve shape and the reference curve shape that exceeds a predefined allowed deviation and therefore indicates a change in an output of the laser light source relative to the known or calibrated state. One or more operating and/or analytical parameters of the laser absorption spectrometer are adjusted to correct the test curve shape to reduce the difference between the test curve shape and the reference curve shape.