Magnetic presence detection of a smartphone
First Claim
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1. A system for magnetic presence detection, said system comprising:
- a magnetic proximity detector associated with a tag, wherein said tag transmits particular data when a mobile device is detected by said magnetic proximity detector; and
a filter that filters out noisy magnetic signals and periodical variations of an alternating magnetic field and wherein filtering by said filter is achieved utilizing a moving average filter with respect to an even number of measurements each spaced with an odd number of half periods of said alternating magnetic field so as to enhance a detection capability by said magnetic proximity detector and facilitate detection of said mobile device by said magnetic proximity detector.
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Abstract
A system and method for magnetic presence detection. A magnetic proximity detector is associated with a tag, wherein the tag transmits particular data when a mobile device is detected by the magnetic proximity detector, which can avoid needless battery consumption by the tag and/or the mobile device. A filter can be employed to filter out noisy magnetic signals so as to enhance a detection capability by the magnetic proximity detector and facilitate detection of the mobile device by the magnetic proximity detector.
23 Citations
20 Claims
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1. A system for magnetic presence detection, said system comprising:
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a magnetic proximity detector associated with a tag, wherein said tag transmits particular data when a mobile device is detected by said magnetic proximity detector; and a filter that filters out noisy magnetic signals and periodical variations of an alternating magnetic field and wherein filtering by said filter is achieved utilizing a moving average filter with respect to an even number of measurements each spaced with an odd number of half periods of said alternating magnetic field so as to enhance a detection capability by said magnetic proximity detector and facilitate detection of said mobile device by said magnetic proximity detector. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system for magnetic presence detection, said system comprising:
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a magnetic proximity detector associated with a tag, wherein said tag transmits particular data when a mobile device is detected by said magnetic proximity detector; and a filter that filters out noisy magnetic signals so as to enhance a detection capability by said magnetic proximity detector and facilitate detection of said mobile device by said magnetic proximity detector wherein said filter filters slow variations of the terrestrial magnetic field and wherein said filter filters periodical variations of an alternating magnetic field and wherein filtering by said filter is achieved utilizing a moving average filter with respect to an even number of measurements each spaced with an odd number of half periods of said alternating magnetic field. - View Dependent Claims (11, 12, 13, 14)
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15. A method for magnetic presence detection, said method comprising:
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associating a magnetic proximity detector with a tag; transmitting particular data from said tag when a mobile device is detected by said magnetic proximity detector; and filtering out noisy magnetic signals with a filter wherein said filtering includes filtering by said filter utilizing a moving average filter with respect to an even number of measurements each spaced with an odd number of half periods of said alternating magnetic field and wherein said filter filters slow variations of the terrestrial magnetic field and periodical variations of an alternating magnetic field so as to enhance a detection capability by said magnetic proximity detector and facilitate detection of said mobile device by said magnetic proximity detector. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification