BOPI 09 BR/2023 REPERTOIRE NUMERIQUE 41 Fig. 2 Consulter le mémoire ________________________________________ (11) 21178 (51) G01S 19/48 (2018.01) (21) 1202300075 - PCT/EP2021/074171 (22) 01/09/2021 (30) EP n° 20193811.5 du 01/09/2020 (54) Underground worksite vehicle positioning control. (72) HÄMÄLÄINEN, Jyrki (FI) (73) SANDVIK MINING AND CONSTRUCTION OY, Pihtisulunkatu 9, 33330 TAMPERE (FI) (74) S.C.P AKKUM, AKKUM & Associates, n° 1777, Rue 6.261, Auditorium Jean Paul II, Quartier Mbankolo, B.P. 4966, YAOUNDE (CM). (57) According to an example aspect of the present invention, there is provided a method, comprising: defining accumulated dead-reckoning based positioning error of a vehicle at a worksite comprising an underground tunnel system, detecting a trigger for signal acquisition for satellite based first positioning source, in response to the detected trigger for signal acquisition, generating a satellite positioning pendency estimate indicative of remaining time period for obtaining satellite-based positioning information by the first positioning source, defining speed for the vehicle on the basis of the accumulated dead-reckoning based positioning error and the satellite positioning pendency estimate. Fig. 2 Consulter le mémoire ________________________________________ (11) 21179 (51) F25B 17/00 (2018.01) ; F25B 27/00 (2018.01) (21) 1202300081 (22) 01/03/2023 (54) Dispositif de collecte de chaleur solaire formé de tubes composites à adsorption en forme de venturi. (72) Dahirou Boubakary (CM) (73) UNIVERSITE DE NGAOUNDERE, B.P. 455, NGAOUNDERE (CM) (57) La présente invention est un dispositif de captage de chaleur thermique pour la production de froid
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