Swimmer location monitor
First Claim
1. A low frequency electromagnetic surveillance system for tracking the location of swimmers who may be in danger comprising:
- a means for detecting potential or actual swimmer distress for each swimmer equipped with an individual Swimmer Location Monitor (SLM) wherein said means triggers a pulsed low frequency alarm transmission when specified thresholds monitored by said SLM are exceeded;
a means for generating an electromagnetic field through the water from a transmitter contained in the SLM wherein said electromagnetic field is subsequently transmitted;
a means for receiving said magnetic field transmission;
a means for amplifying, filtering and processing the received signals resulting in a display of the distressed swimmer'"'"'s location; and
a means for triggering an audible alarm whenever said specified thresholds are exceeded.
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Accused Products
Abstract
A system is disclosed for locating swimmers who could be in danger of drowning, as determined by preset parameters such as the time duration that they remain at a depth where breathing is impossible. In this system, each individual swimmer wears a Swimmer Location Monitor (SLM). This is a miniature electronic device that not only determines the extent of the swimmer'"'"'s danger but also emits an electromagnetic alarm signal whenever such a danger exists. At each occurrence, an alarm, which may be audible and/or visual, is sounded on the surface while the swimmer'"'"'s location is tracked in real time from the signals received on an antenna network deployed along the bottom of the swimming area. These signals are combined in a central processor and the computed real-time location is displayed graphically on a monitor to guide the guard personnel in rescue operations. The invention is intended for use in pools, beaches, water parks and other swimming areas.
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Citations
11 Claims
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1. A low frequency electromagnetic surveillance system for tracking the location of swimmers who may be in danger comprising:
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a means for detecting potential or actual swimmer distress for each swimmer equipped with an individual Swimmer Location Monitor (SLM) wherein said means triggers a pulsed low frequency alarm transmission when specified thresholds monitored by said SLM are exceeded; a means for generating an electromagnetic field through the water from a transmitter contained in the SLM wherein said electromagnetic field is subsequently transmitted; a means for receiving said magnetic field transmission; a means for amplifying, filtering and processing the received signals resulting in a display of the distressed swimmer'"'"'s location; and a means for triggering an audible alarm whenever said specified thresholds are exceeded. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification