US 11,989,903 B2
Device for characterizing a fire and associated method for determining radiant fluxes
Lucile Rossi Tison, Afa (FR); Frédéric Morandini, Corte (FR); Tom Toulouse, Corte (FR); and Xavier Silvani, Ajaccio (FR)
Assigned to UNIVERSITÉ DE CORSE P PAOLI, Corte (FR); and CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, Paris (FR)
Appl. No. 17/289,994
Filed by UNIVERSITÉ DE CORSE P PAOLI, Corte (FR); and Centre National de la Recherche Scientifique, Paris (FR)
PCT Filed Oct. 22, 2019, PCT No. PCT/FR2019/052508
§ 371(c)(1), (2) Date Apr. 29, 2021,
PCT Pub. No. WO2020/089541, PCT Pub. Date May 7, 2020.
Claims priority of application No. 1860119 (FR), filed on Oct. 31, 2018.
Prior Publication US 2021/0398309 A1, Dec. 23, 2021
Int. Cl. G06T 7/62 (2017.01); H04N 13/239 (2018.01)
CPC G06T 7/62 (2017.01) [H04N 13/239 (2018.05); G06T 2207/10012 (2013.01); G06T 2207/10048 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A device for characterizing a fire, comprising:
at least one stereovision system comprising a first and a second image capture unit that are configured to take images of a fire, said first and second image capture units each having an optical axis, said first and second optical axes being separated from one another by a predetermined distance at the first and second image capture units; and
at least one processing unit configured to combine the images taken by the first and second image capture units of the at least one stereovision system in order to determine at least one geometric characteristic of the fire,
wherein the processing unit is configured to determine a radiative flux of this fire on the basis of a calibrated linear relationship established between a radiative flux of a reference fire as a function of at least one of the geometric characteristics of the fire and of at least one fire category chosen from among a plurality of predetermined fire categories in order to be able to determine zones exposed to a radiative flux emitted by the fire that exceeds a reference threshold; and
wherein the at least one stereovision system further comprises a locating system with centimeter precision, configured to transmit, to the at least one processing unit, the position, inclination and orientation of the first and second optical axes of the first and second image capture units of the at least one stereovision system.