公开(公告)号：AU2015359174B2

公开(公告)日：2021-05-13

申请号：AU2015359174

申请日：2015-12-11

Applicant: BERTIN TECHNOLOGIES SA

Inventor： MORIN NATHALIE ,  BERNASCOLLE PHILIPPE ,  FERVEL FRANCK

IPC: G01J3/02 ,  G01J3/12 ,  G01J3/36 ,  G02B17/00 ,  G02B27/10

Abstract: The invention relates to an optical filtering device (10), in particular for detecting gas remotely, comprising a member (22, 24, 26) including a tubular passage housing a plurality of reflecting structures (34a, 34b, 34c, 34d) that are able to reflect infrared wavelengths, said structures (34a, 34b, 34c, 34d) being elongate along the axis of the tubular passage and placed about this axis. According to the invention, the reflective structures (34a, 34b, 34c, 34d) comprise means for filtering by absorption different wavelength bands located in the infrared spectral band.

公开(公告)号：FR2998371B1

公开(公告)日：2015-01-16

申请号：FR1261138

申请日：2012-11-22

Applicant: BERTIN TECHNOLOGIES SA

Inventor： FERVEL FRANCK ,  BERNASCOLLE PHILIPPE

IPC: G01J3/02 ,  G01N21/3504

Abstract: L'invention concerne un dispositif de détection optique d'un gaz dans une zone d'espace observée (20), comprenant une caméra (22) et des moyens de détection en continu d'au moins un gaz dans la zone observée à partir d'une analyse d'absorbance dans une pluralité de bandes spectrales différentes. Le dispositif comprend en outre une matrice de micromiroirs (14) individuellement orientables entre au moins deux positions dans une première desquelles ils renvoient le flux radiatif (16) en provenance de la zone observée vers la caméra (22) pour la détection de gaz dans lesdites bandes spectrales et une deuxième position dans laquelle ils renvoient le flux radiatif (16) en provenance de la zone observée vers un spectroscope infrarouge à transformée de Fourier (24).

公开(公告)号：NO20033308A

公开(公告)日：2003-09-15

申请号：NO20033308

申请日：2003-07-22

Applicant: BERTIN TECHNOLOGIES SA

Inventor： ALAZARINE AYMERIC ,  BERNASCOLLE PHILIPPE ,  LEBLAY PIERRICK ,  PELOUS GERARD

IPC: G01N21/35

CPC classification number: G01M3/38 ,  G01J5/0014 ,  G01J5/58 ,  G01J5/602 ,  G01J2005/0085 ,  G01N21/3504 ,  G01N2021/1793

公开(公告)号：FR2832799A1

公开(公告)日：2003-05-30

申请号：FR0115220

申请日：2001-11-23

Applicant: BERTIN TECHNOLOGIES SA

Inventor： ALAZARINE AYMERIC ,  BERNASCOLLE PHILIPPE ,  LEBLAY PIERRICK ,  PELOUS GERARD

IPC: G01N21/35 ,  G01J5/60 ,  G01V8/00 ,  G01M3/38

Abstract: A measurement scale independent of temperature is determined in the calculating window from the ratio of differences in flow through the two filters. The gas concentration can be calculated from this scale by weighting the ratio using the mean flow in the calculating window or as a function of the difference between a preset temperature and the ground temperatures during the calculating window Optical gas detection system by observation at a distance of an area using a measurement filter with a transmission band comprising a specific absorption ray for the gas being sought and a reference filter with a transmission band corresponding to that of the measurement filter but not including the specific absorption ray for the gas. The process involves detecting the presence of the gas by determining the difference in flow through the gas (22) and coming from points at different temperatures in a calculation window, and of the ratio of the flow differences seen through the measurement filter and through the reference filter. The scale is equal to ( eta . phi p)/K, where eta is the ratio, phi the mean flow in the calculating window, p a parameter depending on the measuring and reference filters and K a normalization parameter equal to phi p for a preset temperature in the calculating window, e.g. 20 deg C. The values of the derivative with respect to the temperature of the spectral luminescence of a black body at a given mean temperature are calculated for difference ground temperatures to deduce the derivative with respect to the temperature of a ratio for the same mean temperature in the absence of gas. The values are recorded and the measured ratios weighted as a function of the difference between the ground temperatures and the preset mean temperature. For the detection of several gases, a filter assembly (F1, F2, F3) is used, with the transmission bands determined relative to each other as a function of the absorption rays of the gases (G1, G2, G3). Thus, a filter (F2) can be used as a reference filter for a gas (G1) and as a measuring filter for another gas (G2,G3), or vice versa, connecting the filters in pairs, each pair detecting one or more gases. An identification matrix is formed where the rows correspond to the pairs of filters and the columns to the gases to be detected. The matrix is formed by calibrating the various filters and is used to detect the presence and concentration of the gases. A series of filters with stepped transmission bands are used.

公开(公告)号：FR3030041B1

公开(公告)日：2017-12-22

申请号：FR1462391

申请日：2014-12-12

Applicant: BERTIN TECHNOLOGIES SA

Inventor： MORIN NATHALIE ,  BERNASCOLLE PHILIPPE ,  FERVEL FRANCK ,  DRUART GUILLAUME

IPC: G01N21/3504

公开(公告)号：AU2015359174A1

公开(公告)日：2017-07-06

申请号：AU2015359174

申请日：2015-12-11

Applicant: BERTIN TECHNOLOGIES SA

Inventor： MORIN NATHALIE ,  BERNASCOLLE PHILIPPE ,  FERVEL FRANCK

IPC: G01J3/02 ,  G01J3/12 ,  G01J3/36 ,  G02B17/00 ,  G02B27/10

Abstract: The invention relates to an optical filtering device (10), in particular for detecting gas remotely, comprising a member (22, 24, 26) including a tubular passage housing a plurality of reflecting structures (34a, 34b, 34c, 34d) that are able to reflect infrared wavelengths, said structures (34a, 34b, 34c, 34d) being elongate along the axis of the tubular passage and placed about this axis. According to the invention, the reflective structures (34a, 34b, 34c, 34d) comprise means for filtering by absorption different wavelength bands located in the infrared spectral band.

公开(公告)号：NO20033308L

公开(公告)日：2003-09-15

申请号：NO20033308

申请日：2003-07-22

Applicant: BERTIN TECHNOLOGIES SA

Inventor： ALAZARINE AYMERIC ,  BERNASCOLLE PHILIPPE ,  LEBLAY PIERRICK ,  PELOUS GERARD

IPC: G01N21/35

Abstract: A measurement scale independent of temperature is determined in the calculating window from the ratio of differences in flow through the two filters. The gas concentration can be calculated from this scale by weighting the ratio using the mean flow in the calculating window or as a function of the difference between a preset temperature and the ground temperatures during the calculating window Optical gas detection system by observation at a distance of an area using a measurement filter with a transmission band comprising a specific absorption ray for the gas being sought and a reference filter with a transmission band corresponding to that of the measurement filter but not including the specific absorption ray for the gas. The process involves detecting the presence of the gas by determining the difference in flow through the gas (22) and coming from points at different temperatures in a calculation window, and of the ratio of the flow differences seen through the measurement filter and through the reference filter. The scale is equal to ( eta . phi p)/K, where eta is the ratio, phi the mean flow in the calculating window, p a parameter depending on the measuring and reference filters and K a normalization parameter equal to phi p for a preset temperature in the calculating window, e.g. 20 deg C. The values of the derivative with respect to the temperature of the spectral luminescence of a black body at a given mean temperature are calculated for difference ground temperatures to deduce the derivative with respect to the temperature of a ratio for the same mean temperature in the absence of gas. The values are recorded and the measured ratios weighted as a function of the difference between the ground temperatures and the preset mean temperature. For the detection of several gases, a filter assembly (F1, F2, F3) is used, with the transmission bands determined relative to each other as a function of the absorption rays of the gases (G1, G2, G3). Thus, a filter (F2) can be used as a reference filter for a gas (G1) and as a measuring filter for another gas (G2,G3), or vice versa, connecting the filters in pairs, each pair detecting one or more gases. An identification matrix is formed where the rows correspond to the pairs of filters and the columns to the gases to be detected. The matrix is formed by calibrating the various filters and is used to detect the presence and concentration of the gases. A series of filters with stepped transmission bands are used.

公开(公告)号：AU2002360183A1

公开(公告)日：2003-06-10

申请号：AU2002360183

申请日：2002-11-20

Applicant: BERTIN TECHNOLOGIES SA

Inventor： LEBLAY PIERRICK ,  PELOUS GERARD ,  ALAZARINE AYMERIC ,  BERNASCOLLE PHILIPPE

IPC: G01N21/35

Abstract: A measurement scale independent of temperature is determined in the calculating window from the ratio of differences in flow through the two filters. The gas concentration can be calculated from this scale by weighting the ratio using the mean flow in the calculating window or as a function of the difference between a preset temperature and the ground temperatures during the calculating window Optical gas detection system by observation at a distance of an area using a measurement filter with a transmission band comprising a specific absorption ray for the gas being sought and a reference filter with a transmission band corresponding to that of the measurement filter but not including the specific absorption ray for the gas. The process involves detecting the presence of the gas by determining the difference in flow through the gas (22) and coming from points at different temperatures in a calculation window, and of the ratio of the flow differences seen through the measurement filter and through the reference filter. The scale is equal to ( eta . phi p)/K, where eta is the ratio, phi the mean flow in the calculating window, p a parameter depending on the measuring and reference filters and K a normalization parameter equal to phi p for a preset temperature in the calculating window, e.g. 20 deg C. The values of the derivative with respect to the temperature of the spectral luminescence of a black body at a given mean temperature are calculated for difference ground temperatures to deduce the derivative with respect to the temperature of a ratio for the same mean temperature in the absence of gas. The values are recorded and the measured ratios weighted as a function of the difference between the ground temperatures and the preset mean temperature. For the detection of several gases, a filter assembly (F1, F2, F3) is used, with the transmission bands determined relative to each other as a function of the absorption rays of the gases (G1, G2, G3). Thus, a filter (F2) can be used as a reference filter for a gas (G1) and as a measuring filter for another gas (G2,G3), or vice versa, connecting the filters in pairs, each pair detecting one or more gases. An identification matrix is formed where the rows correspond to the pairs of filters and the columns to the gases to be detected. The matrix is formed by calibrating the various filters and is used to detect the presence and concentration of the gases. A series of filters with stepped transmission bands are used.