H - Electricity – 04 – N
Patent
H - Electricity
04
N
H04N 7/18 (2006.01) E04H 4/14 (2006.01) G08B 21/00 (2006.01) G08B 21/08 (2006.01)
Patent
CA 2235766
A system for monitoring a swimming pool to prevent drowning accidents, including sensing means (D1, D2, D3) for providing electrical signals forming images of bodies immersed in the pool water; means (10) for digitising the resulting images; means (10) for compressing the digital image data; means (11<u>a</u>, 11<u>b</u>) for storing the digital image data at a series of times; means (12, 13) for comparing digitised images of a single body at a series of times; means (12, 13) for estimating the nature of a body, the path of the body and changes in the position of the body on the basis of the series of images; and decision means (12, 13) for operating alarm means should the path or movement of the body being observed give cause for concern.
Le système de surveillance d'une piscine pour la prévention des noyades comprend: des moyens de détection (D1, D2, D3) propres à donner, sous forme de signaux électriques, des images des corps immergés dans l'eau de la piscine; des moyens de numérisation (10) des images obtenues; des moyens de compression (10) des données numériques d'images; des moyens de stockages (11<u>a</u>, 11<u>b</u>) des données numériques d'images à instants successifs; des moyens de comparaison (12, 13) entre des images numérisées d'un même corps à des instants successifs; des moyens d'estimation (12, 13) de la nature d'un corps, de la trajectoire et des changements d'attitude du corps d'après ces images successives; et des moyens de décision (12, 13) propres à déclencher des moyens d'alarme en cas de trajectoire ou mouvement suspect du corps observé.
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