Wireless ECG sensor system and method
First Claim
1. A wireless ECG sensor system comprising:
- a sensor patch configured to attach to a user, the sensor patch comprising;
a substrate having first and second sections and configured to exhibit dielectric dispersion between the first and the second sections;
wherein a positive electrode is carried by the first section of the substrate, andwherein a negative electrode is carried by the second section of the substrate; and
a passive radio-frequency identification (RFID) transponder carried by the substrate, and comprising;
a first antenna,a non-transitory and non-volatile storage medium in electrical communication with the first antenna,a load modulation switch in electrical communication with the first antenna, anda microcontroller in electrical communication with the first antenna and in data communication with both the storage medium and the load modulation switch; and
an interrogator device separated from the sensor patch and configured to be carried by a housing, the interrogator device comprising;
a second antenna in electrical communication with a power source and configured to wirelessly transmit electromagnetic radiation having a resonant frequency of the first antenna of the passive RFID transponder; and
a demodulator configured to measure a voltage amplitude of the electromagnetic radiation wirelessly transmitted by the second antenna;
wherein the first antenna of the passive RFID transponder is configured to inductively receive power for operating the passive RFID transponder of the sensor patch from the electromagnetic radiation wirelessly transmitted by the second antenna of the interrogator device; and
wherein, upon receipt of power, the microcontroller of the passive RFID transponder is configured to receive a cardiac activity signal from at least one of the positive and negative electrodes of the sensor patch, to retrieve a location identifier from the storage medium of the passive RFID transponder, and to operate the load modulation switch of the passive RFID transponder to alter the voltage amplitude of the electromagnetic radiation to transmit to the demodulator a cardiac event reading comprising the cardiac activity signal and the location identifier.
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Accused Products
Abstract
A wireless ECG sensor system includes a sensor patch configured to attach to a user. The sensor patch may include a substrate having a positive and a negative electrode, and a passive radio-frequency identification (RFID) transponder carried by the substrate. The RFID may include a first antenna, a non-transitory and non-volatile storage medium in electrical communication with the first antenna, a load modulation switch in electrical communication with the first antenna, and a microcontroller in electrical communication with the first antenna and in data communication with both the storage medium and the load modulation switch. The system may also include an interrogator device having a second antenna configured to wirelessly transmit electromagnetic radiation having a resonant frequency of the first antenna of the sensor patch, and a demodulator configured to measure a voltage amplitude of the electromagnetic radiation wirelessly transmitted by the second antenna.
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Citations
15 Claims
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1. A wireless ECG sensor system comprising:
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a sensor patch configured to attach to a user, the sensor patch comprising; a substrate having first and second sections and configured to exhibit dielectric dispersion between the first and the second sections; wherein a positive electrode is carried by the first section of the substrate, and wherein a negative electrode is carried by the second section of the substrate; and a passive radio-frequency identification (RFID) transponder carried by the substrate, and comprising; a first antenna, a non-transitory and non-volatile storage medium in electrical communication with the first antenna, a load modulation switch in electrical communication with the first antenna, and a microcontroller in electrical communication with the first antenna and in data communication with both the storage medium and the load modulation switch; and an interrogator device separated from the sensor patch and configured to be carried by a housing, the interrogator device comprising; a second antenna in electrical communication with a power source and configured to wirelessly transmit electromagnetic radiation having a resonant frequency of the first antenna of the passive RFID transponder; and a demodulator configured to measure a voltage amplitude of the electromagnetic radiation wirelessly transmitted by the second antenna; wherein the first antenna of the passive RFID transponder is configured to inductively receive power for operating the passive RFID transponder of the sensor patch from the electromagnetic radiation wirelessly transmitted by the second antenna of the interrogator device; and wherein, upon receipt of power, the microcontroller of the passive RFID transponder is configured to receive a cardiac activity signal from at least one of the positive and negative electrodes of the sensor patch, to retrieve a location identifier from the storage medium of the passive RFID transponder, and to operate the load modulation switch of the passive RFID transponder to alter the voltage amplitude of the electromagnetic radiation to transmit to the demodulator a cardiac event reading comprising the cardiac activity signal and the location identifier. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification