MAGNETIC FIELD SENSOR, SYSTEM AND METHOD FOR DETECTING THE HEART BEAT RATE OF A PERSON IN A VEHICLE, AND SYSTEM AND METHOD FOR DETECTING FATIGUE
First Claim
1. A sensor (11, 12) for detecting at least one component of the magnetic field vector at a position in space where the sensor is located, comprisingat least two cores (801, 802), said cores being made up by an insulated amorphous magnetic wire (803), each core comprising a plurality of windings of said amorphous magnetic wire, said amorphous magnetic wire being arranged so that a current can flow through said wire so as to reduce a noise level of the sensor;
- for each core, a primary winding (804, 805) arranged in a toroidal manner around said core, said primary winding comprising, for each of the cores, substantially the same number of turns around the core, said primary winding being arranged so that a time varying current can be driven through said primary winding, said primary windings being connected in series so that the time varying current flowing through each primary winding is substantially the same;
for each core, a secondary winding (806, 807) arranged around the core, said secondary windings being connected in series and further being connected to an output terminal of the sensor, for providing an output signal at said output terminal.
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Accused Products
Abstract
A system for detecting the heart beat rate of a person in a vehicle, comprising: at least one magnetic field sensor (11, 12) mounted inside the vehicle in a position close to a person'"'"'s seat in the vehicle; and signal processing circuitry (2, 13) arranged to receive an output signal from said at least one magnetic field sensor, and to extract from said output signal data indicative of a heart beat rate. The invention also relates to a system for fatigue detection, and to the corresponding methods.
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Citations
38 Claims
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1. A sensor (11, 12) for detecting at least one component of the magnetic field vector at a position in space where the sensor is located, comprising
at least two cores (801, 802), said cores being made up by an insulated amorphous magnetic wire (803), each core comprising a plurality of windings of said amorphous magnetic wire, said amorphous magnetic wire being arranged so that a current can flow through said wire so as to reduce a noise level of the sensor; -
for each core, a primary winding (804, 805) arranged in a toroidal manner around said core, said primary winding comprising, for each of the cores, substantially the same number of turns around the core, said primary winding being arranged so that a time varying current can be driven through said primary winding, said primary windings being connected in series so that the time varying current flowing through each primary winding is substantially the same; for each core, a secondary winding (806, 807) arranged around the core, said secondary windings being connected in series and further being connected to an output terminal of the sensor, for providing an output signal at said output terminal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 36, 37, 38)
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14. A system for detecting the heart beat rate of a driver of a vehicle, characterised in that it comprises:
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at least one magnetic field sensor (11, 12;
11A+11B) mounted inside the vehicle in a position close to the driver'"'"'s seat in the vehicle, said at least one magnetic field sensor being arranged for measuring at least one component of the magnetic field vector of the magnetic field generated by the heart of said driver; andsignal processing circuitry (2, 13) arranged to receive an output signal from said at least one magnetic field sensor, and to extract, from said output signal, data indicative of a heart beat rate. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A method for detecting the heart beat rate of a driver of a vehicle by measuring at least one component of the magnetic field vector of the magnetic field generated by the heart of the driver, comprising the steps of:
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arranging at least one magnetic field sensor (11, 12) inside the vehicle in a position close to the driver'"'"'s seat in the vehicle, for measuring at least one component of the magnetic field vector of the magnetic field generated by the heart of said driver; and receiving an output signal from said at least one magnetic field sensor, and extracting, from said output signal, data indicative of a heart beat rate. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35)
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Specification