Portable sub-THz and THz radar system for remote physiological parameters detection and method with harmonic and fundamental components
Inventors
STEINBERG, Yochanan • Litman, Yizhaq
Assignees
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Publication Number
US-11633122-B2
Publication Date
2023-04-25
Expiration Date
Abstract
The present invention provides a method and a portable non-invasive sub-THz and THz (THz) radar system for remotely detecting physiological parameters of a subject, comprising: one or more transmission means for transmitting THz signals to a subject predefined tissue; one or more reception means for receiving a THz signal of the subject, the THz signals being a reflection of the THz signal from subject tissue thereby, receiving at least one physiological parameter change; and microprocessor means coupled and configured to communicate with the transmitter means and/or the reception means for receiving and processing the reflected signals. The microprocessor comprising instructions of pre-treatment and folding the reflected signals; filtering and decimating selected portions of the folded signals and removing folded segments; decomposing of the decimated signal s into sub-component signals: identifying and removing sub-component signals due to random motions; locating quasi-periodic signal information from the remaining sub-component signals thereby, determining at least one physiological parameter of the subject based upon the quasi-periodic signal information components.
Core Innovation
The invention provides a portable non-invasive sub-THz and THz radar system and a corresponding method for remotely detecting physiological parameters of at least one subject. One or more transmitters transmit a transmitted signal to tissue of the subject over a frequency range of 0.03 to 3 THz, and one or more receivers receive a reflection of the transmitted signal from the tissue as a reflected signal. A microprocessor communicates with the transmitters and receivers and processes the reflected signal to determine physiological information.
The microprocessor preprocesses the reflected signal by pretreatment and folding, then performs filtering and decimating selected portions of the folded signal and removing folded segments of the folded signal. The decimated signal is decomposed into sub-component signals, and sub-component signals due to random motions of the subject are identified and removed. Quasi-periodic signal components are located within the remaining sub-component signals.
Fundamental physiological signal components and respective harmonics are selected and utilized to determine physiological parameters based on remaining spectral content and harmonic behavior and groupings thereof. The determined physiological parameter information is used to generate physiological parameter profiles and to interpret real-time received signals against stored signal information to determine a subject health status.
The output can be exported as an alert, an electronic message, a flag, or an activation instruction of an electronic circuit or device associated with the health status, and the data can be associated with a cloud-based system. Additional refinements include ranking and selection for subject health status interpretation, simultaneously monitoring additional subjects in a predefined location, and optionally incorporating sensory data fusion with at least one sensor.
Claims Coverage
The document includes two independent claims, a method claim and a system claim. Across these claims, six inventive features are identified.
Portable non-invasive sub-THz and THz radar for remote physiological detection
A portable non-invasive sub-THz and THz radar system for remotely detecting physiological parameters of a subject, with one or more transmitters transmitting a transmitted signal to tissue of the subject at 0.03 to 3 THz and one or more receivers receiving a reflection of the transmitted signal from the tissue as a reflected signal.
Microprocessor signal processing with pretreatment and folding
A microprocessor configured to receive and process the reflected signal, including pretreatment and folding of the reflected signal.
Filtering and decimating selected portions and removing folded segments
Filtering and decimating selected portions of the folded signal and removing folded segments of the folded signal.
Decomposing into sub-component signals and removing random-motion sub-components
Decomposing the decimated signal into sub-component signals and identifying and removing sub-component signals due to random motions of the subject.
Locating quasi-periodic signal components
Locating quasi-periodic signal components within the remaining sub-component signals.
Selecting and utilizing fundamental physiological components and harmonics
Selecting and utilizing fundamental physiological signal components and respective harmonics from the remaining sub-component signals to determine at least one physiological parameter based upon remaining spectral components and harmonic behavior and groupings thereof.
The independent claims center on portable non-invasive sub-THz and THz radar signal processing that removes random-motion components and extracts quasi-periodic physiological components by selecting fundamental physiological signal components and respective harmonics based on remaining spectral content and harmonic behavior and groupings thereof.
Stated Advantages
Enables remote detection of physiological parameters of at least one subject using a portable non-invasive sub-THz and THz radar system.
Separates quasi-periodic physiological signal components from components due to random motions of the subject to determine physiological parameters.
Supports determination of physiological parameters based on remaining spectral content and harmonic behavior and groupings thereof.
Provides interpretation of real-time received signals against stored signal information to determine a subject health status.
Provides exported outputs including an alert, an electronic message, a flag, or an activation instruction for an electronic circuit or device.
Supports association of physiological parameter data with a cloud-based system.
Supports simultaneous monitoring of one or more additional subjects in a predefined location.
Documented Applications
Remote detection of physiological parameters of a subject using portable non-invasive sub-THz and THz radar.
Generation of physiological parameter profiles, including average heart rate versus time, heartbeat-to-heartbeat interval, and respiration intervals, variations, and amplitude.
Subject health status interpretation categories including fatigue, sleep, stress, anxiety, physiological crisis, comfort level, or combinations, with exporting an alert, electronic message, flag, or activation instruction.
Cloud-based association of data relating to the at least one determined physiological parameter.
Simultaneous monitoring of one or more additional subjects in a predefined location.
Sensory data fusion via at least one sensor.
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