POOL ALARM SYSTEM
First Claim
1. A pool alarm system for detecting the introduction and/or presence of a body in a liquid pool, said system comprising:
- a first sensing means for sensing audible signals generated by the introduction and/or presence of said body in said liquid pool;
a second sensing means for sensing water pressure signals generated by the introduction and/or presence of said body in said liquid pool;
an analog signal processing unit for pre-processing said audible signals and said water pressure signals and for converting said pre-processed signals to digital data;
an alarm device activated when said body was detected in the liquid pool;
a processor and control unit for processing said digital data and control said alarm device;
wherein, said audible signals are detected and processed faster than the detection of said water pressure signal, whereby, according to the intensity of an acoustic signature originate from said audible signals an aquatic signature originate from said water pressure sensor is analyzed by using an adaptable sensitivity parameter dependent on the intensity of said acoustic signature for improving alarm triggering decision.
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Accused Products
Abstract
Pool alarm system for detecting the introduction and/or presence of a body in a liquid pool. The system includes: a first sensor for sensing audio signals generated by the body in the pool; a second sensor for sensing water pressure signals generated by the body in the pool; an analog signal processor for pre-processing the audio signals and water pressure signals and for converting them to digital data; an alarm device activated when the body was detected in the pool; a processor and control unit. The audio signals are detected and processed faster than the detection of the water pressure signal. According to the intensity of an acoustic signature originating from the audible signals an aquatic signature originating from the water pressure sensor is analyzed using an adaptable sensitivity parameter dependent on the intensity of the acoustic signature for improving alarm triggering decision.
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Citations
13 Claims
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1. A pool alarm system for detecting the introduction and/or presence of a body in a liquid pool, said system comprising:
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a first sensing means for sensing audible signals generated by the introduction and/or presence of said body in said liquid pool; a second sensing means for sensing water pressure signals generated by the introduction and/or presence of said body in said liquid pool; an analog signal processing unit for pre-processing said audible signals and said water pressure signals and for converting said pre-processed signals to digital data; an alarm device activated when said body was detected in the liquid pool; a processor and control unit for processing said digital data and control said alarm device;
wherein, said audible signals are detected and processed faster than the detection of said water pressure signal, whereby, according to the intensity of an acoustic signature originate from said audible signals an aquatic signature originate from said water pressure sensor is analyzed by using an adaptable sensitivity parameter dependent on the intensity of said acoustic signature for improving alarm triggering decision. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for detecting the introduction and/or presence of a body in a liquid pool comprising the following steps:
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sensing water pressure physical signals in said liquid pool and converting said water pressure physical signals into analog electrical signal;
sensing acoustic signals in liquid pool and converting said acoustic signals into analog electrical signals;pre-amplifying and pre-filtering said detected acoustic electrical signals;
pre-processing and digitizing said acoustic electric signals and said analog electric signals;analyzing an acoustic signature originated from said detected acoustic signal; determining high sensitivity level to the water pressure signal when analyzing water pressure signature if the intensity of the acoustic signature is greater than a predetermined intensity level; determining low sensitivity level to the water pressure signal when analyzing water pressure signature if the intensity of the acoustic signature is smaller than a predetermined intensity level; analyzing water pressure signature; providing alarm activation decision if whether there is introduction and/or presence of a body in a liquid pool by utilizing the analysis of said water pressure and acoustic signatures; and activating a liquid pool alarm device if said decision is that a body introduce to said liquid pool.
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Specification