Living being presence detection system
First Claim
1. A system for distinguishing between a first condition corresponding to a living subject being directly in contact with an object of interest, and a second condition corresponding to the absence of contact between the living subject and the object of interest, the system comprising:
- a transducer disposed in predetermined relationship to the object of interest, for producing a transducer signal responsive to a pressure wave resulting from the living subject being directly in contact the object of interest;
a database for storing first data corresponding to the first condition and second data corresponding to the second condition;
a processor for calculating an algorithm corresponding to a non-linear short-term frequency-selective energy distribution of the transducer signal over time to produce corresponding transducer signal data; and
an arrangement for determining a threshold between the first and second conditions in response to the transducer signal data and the first and second data.
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Accused Products
Abstract
A system for distinguishing between a first condition corresponding to a living subject being directly in contact with an object of interest, and a second condition corresponding to the absence of contact between the living subject and the object of interest. A transducer is disposed in predetermined relationship to the object of interest and produces a transducer signal responsive to a pressure wave resulting from the living subject being directly in contact the object of interest. A database stores data corresponding to the first condition and may contain additional data corresponding to the second condition. A processor calculates an algorithm of a non-linear short-term frequency-selective energy distribution of the transducer signal over time to produce transducer signal data. An arrangement, which may be a human listener or a processor system, determines a threshold between the first and second conditions in response to the transducer signal data and the first and second data. The direct contact may be a tap or stroking contact by a living subject. The transducer can be disposed within, or on the exterior of, the object of interest.
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Citations
20 Claims
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1. A system for distinguishing between a first condition corresponding to a living subject being directly in contact with an object of interest, and a second condition corresponding to the absence of contact between the living subject and the object of interest, the system comprising:
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a transducer disposed in predetermined relationship to the object of interest, for producing a transducer signal responsive to a pressure wave resulting from the living subject being directly in contact the object of interest;
a database for storing first data corresponding to the first condition and second data corresponding to the second condition;
a processor for calculating an algorithm corresponding to a non-linear short-term frequency-selective energy distribution of the transducer signal over time to produce corresponding transducer signal data; and
an arrangement for determining a threshold between the first and second conditions in response to the transducer signal data and the first and second data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A system for distinguishing between a first condition corresponding to a living subject of a species of interest being directly in contact with an object of interest, and a second condition corresponding to the absence of contact between the living subject and the object of interest, the system comprising:
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a transducer disposed in predetermined relationship to the object of interest, for producing a transducer signal responsive to a pressure wave resulting from the heartbeat of the living subject; and
a modulation system for translating the frequency of the transducer signal. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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20. A system for distinguishing between a first condition corresponding to a living subject of a species of interest being directly in contact with an object of interest, and a second condition corresponding to the absence of contact between the living subject and the object of interest, the system comprising:
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a plurality of pressure transducers disposed in predetermined relationship to the object of interest, for producing respective transducer signals responsive to pressure waves resulting from the heartbeat of the living subject;
a database for storing data corresponding to a heartbeat characteristic of the species of the living subject;
a processor for calculating an algorithm corresponding to a non-linear short-term frequency-selective energy distribution of the transducer signals over time, and for comparing the frequency-selective energy distribution of the transducer signals to the data in the database; and
an arrangement for determining a threshold for distinguishing between the first and second conditions.
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Specification