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Применить Всего найдено 6. Отображено 6.
20-09-2018 дата публикации

METHOD AND APPARATUS FOR NON-CONTACT FAST VITAL SIGN ACQUISITION BASED ON RADAR SIGNAL

Номер: US20180263502A1
Автор: JENSHAN LIN, CHANGYU WEI, LIN JENSHAN, WEI CHANGYU, LIN, JENSHAN, WEI, CHANGYU
Принадлежит:

Various examples are provided for non-contact vital sign acquisition. Information can be provided regarding vibrations of a target using a radar signal such as, e.g., non-contact vital sign measurement. Examples include estimation of heart rate, change in heart rate, respiration rate, and/or change in respiration rate, for a human or other animal. Implementations can produce one or both rates of vibration and/or change in one or both rates of vibration for a target other than an animal or human experiencing two vibrations at the same time, such as a motor, a vehicle incorporating a motor, or another physical object. Some implementations can estimate the respiration movement in the radar baseband output signal. The estimated respiration signal can then be subtracted from radar signals in the time domain and, optionally, can be further enhanced using digital signal processing techniques, to produce an estimate of the heartbeat pulses. 1. A method of estimating a vibration rate of a target , comprising:{'sub': d', 'd', 'd, 'transmitting a transmit signal from a transmitting antenna at a target such that the transmit signal is reflected by the target to create a reflected signal, wherein the transmit signal and the reflected signal are electromagnetic signals having a wavelength, λ, where the transmit signal is represented as T(t)=cos(ωt+ϕ(t)) and the reflected signal is represented as R(t)=cos(ω(t−t)+ϕ(t−t)), where tis a time period the transmit signal travels from the transmitting antenna to the target and the reflected signal travels from the target to the receiving antenna;'}{'sub': 'd', 'receiving the reflected signal via a receiving antenna to create a receive signal, wherein the target is vibrating with a first vibration at a first vibration rate and a first vibration amplitude, wherein the target is vibrating with a second vibration at a second vibration rate and a second vibration amplitude, wherein a transmit distance between the transmitting antenna and the ...

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Номер записи: 1
06-07-2021 дата публикации

Method and apparatus for non-contact fast vital sign acquisition based on radar signal

Номер: US0011051702B2
Автор: Jenshan Lin, Changyu Wei, LIN JENSHAN, WEI CHANGYU, Lin, Jenshan, Wei, Changyu
Принадлежит: University of Florida Research Foundation, Inc., UNIV FLORIDA

Various examples are provided for non-contact vital sign acquisition. Information can be provided regarding vibrations of a target using a radar signal such as, e.g., non-contact vital sign measurement. Examples include estimation of heart rate, change in heart rate, respiration rate, and/or change in respiration rate, for a human or other animal. Implementations can produce one or both rates of vibration and/or change in one or both rates of vibration for a target other than an animal or human experiencing two vibrations at the same time, such as a motor, a vehicle incorporating a motor, or another physical object. Some implementations can estimate the respiration movement in the radar baseband output signal. The estimated respiration signal can then be subtracted from radar signals in the time domain and, optionally, can be further enhanced using digital signal processing techniques, to produce an estimate of the heartbeat pulses.

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Номер записи: 2
05-12-2017 дата публикации

Low IF architectures for noncontact vital sign detection

Номер: US0009833200B2
Автор: Jenshan Lin, Changyu Wei, LIN JENSHAN, WEI CHANGYU, Lin Jenshan, Wei Changyu
Принадлежит: UNIVERSITY OF FLORIDA RESEARCH FOUNDATION, INC., UNIV FLORIDA, University of Florida Research Foundation, Inc.

Various examples of methods and systems are provided for vibrational frequency detection (e.g., noncontact vital sign detection) using digitally assisted low intermediate frequency (IF) architectures. In one example, a transceiver system is configured to transmit a modulated signal generated by modulating a local oscillator (LO) signal with an IF carrier; generate an IF signal by down converting a received signal comprising backscatter with the LO signal; and simultaneously sample the IF carrier and the IF signal. A vibration frequency can be determined by demodulating the sampled IF signal with the sampled IF carrier. In another example, a method includes generating and transmitting a modulated signal; receiving backscatter of the modulated signal; generating an IF signal by down converting the received signal with the LO signal; simultaneously sampling the IF carrier and the IF signal; and determining a vibration frequency by demodulating the sampled IF signal with the sampled IF carrier.

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Номер записи: 3
17-11-2016 дата публикации

LOW IF ARCHITECTURES FOR NONCONTACT VITAL SIGN DETECTION

Номер: US20160336989A1
Автор: Jenshan Lin, Changyu Wei, LIN JENSHAN, WEI CHANGYU, Lin Jenshan, Wei Changyu
Принадлежит:

Various examples of methods and systems are provided for vibrational frequency detection (e.g., noncontact vital sign detection) using digitally assisted low intermediate frequency (IF) architectures. In one example, a transceiver system is configured to transmit a modulated signal generated by modulating a local oscillator (LO) signal with an IF carrier; generate an IF signal by down converting a received signal comprising backscatter with the LO signal; and simultaneously sample the IF carrier and the IF signal. A vibration frequency can be determined by demodulating the sampled IF signal with the sampled IF carrier. In another example, a method includes generating and transmitting a modulated signal; receiving backscatter of the modulated signal; generating an IF signal by down converting the received signal with the LO signal; simultaneously sampling the IF carrier and the IF signal; and determining a vibration frequency by demodulating the sampled IF signal with the sampled IF carrier. 1. A transceiver system , comprising:transmit circuitry configured to transmit a modulated signal at a target, the modulated signal generated by modulating a local oscillator (LO) signal with an intermediate frequency (IF) carrier;receive circuitry configured to generate an IF signal by down converting a received signal with the LO signal, the received signal comprising backscatter of the modulated signal from the target;an analog-to-digital converter (ADC) configured to simultaneously sample the IF carrier and the IF signal; andprocessing circuitry configured to determine a vibration frequency of the target by demodulating the sampled IF signal with the sampled IF carrier.2. The transceiver system of claim 1 , wherein the transmit circuitry comprises a transmit mixer configured to modulate the LO signal with the IF carrier.3. The transceiver system of claim 1 , wherein the receive circuitry comprises a receive mixer configured to down convert the received signal with the LO ...

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Номер записи: 4
21-10-2021 дата публикации

METHOD AND APPARATUS FOR NON-CONTACT FAST VITAL SIGN ACQUISITION BASED ON RADAR SIGNAL

Номер: US20210321879A1
Автор: LIN JENSHAN, WEI CHANGYU
Принадлежит:

Various examples are provided for non-contact vital sign acquisition. Information can be provided regarding vibrations of a target using a radar signal such as, e.g., non-contact vital sign measurement. Examples include estimation of heart rate, change in heart rate, respiration rate, and/or change in respiration rate, for a human or other animal. Implementations can produce one or both rates of vibration and/or change in one or both rates of vibration for a target other than an animal or human experiencing two vibrations at the same time, such as a motor, a vehicle incorporating a motor, or another physical object. Some implementations can estimate the respiration movement in the radar baseband output signal. The estimated respiration signal can then be subtracted from radar signals in the time domain and, optionally, can be further enhanced using digital signal processing techniques, to produce an estimate of the heartbeat pulses. 1. A portable radar system for vital sign detection , comprising:{'sub': d', 'd', 'd, 'processing circuitry configured to transmit a transmit signal from a transmitting antenna at a target selected from the group consisting of a human and an animal such that the transmit signal is reflected by the target to create a reflected signal, wherein the transmit signal and the reflected signal are electromagnetic signals having a wavelength, λ, where the transmit signal is represented as T(t)=cos(ωt+φ(t)) and the reflected signal is represented as R(t)=cos(ω(t−t)+φ(t−t)), where tis a time period the transmit signal travels from the transmitting antenna to the target and the reflected signal travels from the target to the receiving antenna;'}{'sub': 'd', 'the processing circuitry configured to receive the reflected signal via a receiving antenna to create a receive signal, wherein the target is vibrating with a first vibration at a first vibration rate and a first vibration amplitude and the first vibration is a respiration of the target, wherein ...

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Номер записи: 5
14-04-2016 дата публикации

Method and apparatus for non-contact fast vital sign acquisition based on radar signal

Номер: WO2016057781A1
Автор: Changyu WEI, Jenshan Lin
Принадлежит: The University of Florida Research Foundation, Inc.

Various examples are provided for non-contact vital sign acquisition. Information can be provided regarding vibrations of a target using a radar signal such as, e.g., non-contact vital sign measurement. Examples include estimation of heart rate, change in heart rate, respiration rate, and/or change in respiration rate, for a human or other animal. Implementations can produce one or both rates of vibration and/or change in one or both rates of vibration for a target other than an animal or human experiencing two vibrations at the same time, such as a motor, a vehicle incorporating a motor, or another physical object. Some implementations can estimate the respiration movement in the radar baseband output signal. The estimated respiration signal can then be subtracted from radar signals in the time domain and, optionally, can be further enhanced using digital signal processing techniques, to produce an estimate of the heartbeat pulses.

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Номер записи: 6