Alarm and monitoring device for the presumption of bodies in dan

Details Alarm and monitoring device for the presumption of bodies in dan Alarm and monitoring device for the presumption of bodies in dan

1996-12-06

1999-03-23

Swarthout, Brent A.

Communications: electrical

Condition responsive indicating system

Specific condition

340566, 367153, G08B 2100

Patent

active

058866302

ABSTRACT:
The invention relates to a device for monitoring the absence of motionless bodies in a swimming pool. Two cameras (1) provide for the permanent imaging of the bottom of the swimming pool. These images are first digitized and then processed by a computer. The superimposition of the two information permits analysis of substantially the entire the surface of the swimming pool in order to determine if a portion is masked by an obstacle. When such obstacle is detected, the duration of the presence of each masked pixel is analyzed. After a certain time delay, and for a minimum number of neighboring pixels, an alarm is generated.

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patent: 4932009 (1990-06-01), Lynch
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patent: 5121104 (1992-06-01), Nelson et al.
patent: 5142508 (1992-08-01), Mitchell et al.
patent: 5146208 (1992-09-01), Parra
patent: 5162777 (1992-11-01), Kolbatz
patent: 5369623 (1994-11-01), Zerangue

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