Method and device for sensing a body
First Claim
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1. A method for sensing a body comprising:
- measuring an impedance of a body occupying a seat over a plurality of frequencies, measuring the impedance of the body comprising measuring the impedance of the body with a plurality of electrodes;
comparing the measured impedance of the body with a predefined body model over the plurality of frequencies; and
determining whether the predefined body model corresponds to the measured impedance of the body.
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Abstract
In an embodiment, a method for sensing a body includes measuring an impedance of a body occupying a seat over a plurality of frequencies and comparing the measured impedance of the body with a predefined body model. The method also includes determining whether the predefined body model corresponds to the measured impedance of the body.
22 Citations
30 Claims
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1. A method for sensing a body comprising:
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measuring an impedance of a body occupying a seat over a plurality of frequencies, measuring the impedance of the body comprising measuring the impedance of the body with a plurality of electrodes; comparing the measured impedance of the body with a predefined body model over the plurality of frequencies; and determining whether the predefined body model corresponds to the measured impedance of the body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A system for determining a presence of a body, the system comprising:
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an impedance measurement unit comprising a plurality of electrodes, the impedance measurement unit configured to output a measured body impedance over a plurality of frequencies; and a comparison unit comprising a first input coupled to an output of the impedance measurement unit, a second input coupled to a body impedance model defined over the plurality of frequencies, and an output configured to indicate a correlation between the body impedance model and the measured body impedance, the correlation being computed over the plurality of frequencies. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A method for sensing a presence of a human body in a car seat comprising:
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measuring an impedance of a car seat over a plurality of frequencies; deriving a measured impedance based on the measuring; correlating the measured impedance with a pre-defined human body model defined over at least two of the plurality of frequencies, the pre-defined human body model comprising a dispersive impedance; and based on the correlating, determining whether the measured impedance matches the pre-defined human body model. - View Dependent Claims (27, 28, 29)
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30. A system for sensing a presence of a human body in a car seat, the system comprising:
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an impedance measurement device comprising a plurality of electrodes, the impedance measurement device configured to output a measured car seat impedance over a plurality of frequencies; and a comparison device comprising a first input coupled to the output of the impedance measurement device, a second input coupled to a human body impedance model defined over the plurality of frequencies, and an output configured to indicate whether the measured car seat impedance is correlated to the human body impedance model based on a correlation taken over at least two of the plurality of frequencies.
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Specification