SYSTEMS AND METHODS FOR POINT IN TIME MEASUREMENT OF PHYSIOLOGIC MOTION
0 Assignments
0 Petitions
Accused Products
Abstract
A radar-based physiological motion sensor is disclosed. Doppler-shifted signals can be extracted from the signals received by the sensor. The Doppler-shifted signals can be digitized and processed subsequently to extract information related to the cardiopulmonary motion in one or more subjects. The information can include respiratory rates, heart rates, waveforms due to respiratory and cardiac activity, direction of arrival, abnormal or paradoxical breathing, etc. In various embodiments, the extracted information can be displayed on a display.
-
Citations
129 Claims
-
1-7. -7. (canceled)
-
8. A method of sensing motion using a motion sensor, the method comprising:
-
generating electromagnetic radiation from a source of radiation, wherein the frequency of the electromagnetic radiation is in the radio frequency range; transmitting the electromagnetic radiation towards a subject using one or more transmitters; receiving a radiation scattered at least by the subject using one or more receivers; extracting a Doppler shifted signal from the scattered radiation; transforming the Doppler shifted signal to a digitized motion signal, said digitized motion signal comprising one or more frames, wherein the one or more frames comprise time sampled quadrature values of the digitized motion signal; conditioning the digitized motion signal into a conditioned motion signal using a conditioning algorithm executed by a processor to prepare the digitized motion signal for demodulation; demodulating said conditioned motion signal using a demodulation algorithms executed by a processor to convert a quadrature digitized motion signal to a motion waveform; processing the motion waveform to obtain information corresponding to the cardiopulmonary movement of the subject or a part of the subject; and
communicating the information to an output system that is configured to perform an output action. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
-
-
22. A method of performing a non-contact, point-in-time measurement of vital signs, the method comprising:
-
generating electromagnetic radiation from a source of radiation; transmitting the electromagnetic radiation towards a subject using one or more transmitters; receiving a radiation scattered at least by the subject using one or more receivers; extracting a Doppler shifted signal from the scattered radiation; transforming the Doppler shifted signal to a digitized motion signal, said digitized motion signal comprising one or more frames, wherein the one or more frames comprise time sampled quadrature values of the digitized motion signal; demodulating said one or more frames using a demodulation module executed by a processor to isolate a signal corresponding to a physiological movement of the subject or a part of the subject; analyzing the signal to obtain information regarding signal quality that flags each frame of the signal as low quality or high quality; processing the signal to obtain information corresponding to the physiological movement of the subject or a part of the subject, substantially separate from said non-cardiopulmonary motion or other signal interference; determining the length of the measurement interval with a interval selection module that utilizes the information regarding signal quality and the information corresponding to the physiological movement of the subject or a part of the subject; and communicating the information to an output system that is configured to perform an output action. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37)
-
-
38-126. -126. (canceled)
-
127. A system for sensing motion using a motion sensor, the system comprising:
-
one or more sources for generating electromagnetic radiation, wherein the frequency of the generated electromagnetic radiation is in the radio frequency range; one or more transmitters configured to transmit the generated electromagnetic radiation towards a subject; one or more receivers configured to receive a radiation scattered at least by the subject; a signal extractor configured to extract a Doppler shifted signal from the scattered radiation; a processor configured to transform the Doppler shifted signal to a digitized motion signal, said digitized motion signal comprising one or more frames, wherein the one or more frames comprise time sampled quadrature values of the digitized motion signal; a demodulator configured to demodulate said one or more frames using a demodulation algorithm and isolate a signal corresponding to a physiological movement of the subject or a part of the subject; and a signal analyzer configured to analyze the signal to obtain information corresponding to a non-cardiopulmonary motion or other signal interference; wherein the system is configured to process the signal to obtain information corresponding to the physiological movement of the subject or a part of the subject, substantially separate from said non-cardiopulmonary motion or other signal interference, wherein the system is configured to estimate point-in time vital signs parameters at pre-determined intervals and communicate the information to an output system that is configured to perform an output action.
-
-
128. (canceled)
-
129. (canceled)
Specification