Near-field coherent sensing methods and systems
AssigneeCornell University
InventorsXiaonan HUI, Edwin C. KAN
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Abstract
Near-field coherent sensing (NCS) methods and systems are described herein. The techniques may be used to monitor vital signs is introduced herein. Multiple-input, multiple output near-field techniques may be used to characterize motion. In some embodiments, the methods and systems are used to measure cardiac motion. In some embodiments, the disclosed system is integrated into a seat, such as, for example, a car seat. The system be configured to monitor the vital signs of a seat occupant with multiple sensing points. The sensor can be integrated into the cushion and hence “invisible” to the user.
Claims28
A method for non-contact measurement of an on-body and/or inside-body motion of an individual, comprising:
- providing a first radiofrequency (“RF”) sensing signal within a near-field coupling range of a first motion to be measured to generate a first measurement signal as the first sensing signal modulated by the first motion;
- detecting the first measurement signal using a first receiver;
- matching the first sensing signal and the first measurement signal using a cancellation network to reduce non-modulated first sensing signal detected with the first measurement signal;
- and
- measuring the first motion based on the first measurement signal with reduced non-modulated first sensing signal.
A system for measuring motion of an individual, comprising:
- a first signal source for generating a first sensing signal;
- a first Tx antenna in electrical communication with the first signal source and wherein the first Tx antenna is configured to be disposed within a near-field coupling range of a first motion to be measured such that the first sensing signal is modulated by the first motion to generate a first measurement signal;
- a first receiver for detecting the first measurement signal;
- a first Rx antenna in communication with the first receiver;
- and
- a signal processing circuit configured to match the first sensing signal and the first measurement signal, the signal processing circuit comprising a cancellation network.
Dependencies are inferred from the claim text.