US 12,033,483 B2
Flame detecting arrangement
Lennart Jansson, Värmdö (SE)
Assigned to Firefly AB, Stockholm (SE)
Appl. No. 17/439,535
Filed by Firefly AB, Stockholm (SE)
PCT Filed Mar. 13, 2020, PCT No. PCT/EP2020/056932
§ 371(c)(1), (2) Date Sep. 15, 2021,
PCT Pub. No. WO2020/187775, PCT Pub. Date Sep. 24, 2020.
Claims priority of application No. 1950346-5 (SE), filed on Mar. 20, 2019.
Prior Publication US 2022/0157140 A1, May 19, 2022
Int. Cl. G08B 17/12 (2006.01); G01J 5/00 (2022.01); G06T 7/70 (2017.01); G08B 29/04 (2006.01); G08B 29/18 (2006.01)
CPC G08B 17/125 (2013.01) [G01J 5/0018 (2013.01); G06T 7/70 (2017.01); G08B 29/046 (2013.01); G08B 29/18 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A flame detecting arrangement comprising:
at least one optical flame detector, arranged with its field-of-view covering a predetermined area;
indicating means, arranged together with the at least one flame detector;
at least one movement sensor, arranged together with the at least one flame detector; and
at least one processing device, arranged together with the at least one flame detector, to:
receive signals from the movement sensor;
detect abnormal movement of the flame detector based on these signals;
alert an operator and/or a control system if abnormal movement of the flame detector has been detected; and
indicate, using the indicating means, directions in which the at least one flame detector should be turned in order to be placed in a pre-planned position and orientation in order for its field-of-view to cover the predetermined area.