US 11,896,357 B2
Systems and methods for detecting physical changes without physical contact
John B. Langley, II, Half Moon Bay, CA (US); and Guy McIlroy, Los Gatos, CA (US)
Assigned to Life Detection Technologies, Inc., Sunnyvale, CA (US)
Filed by Life Detection Technologies, Inc., Sunnyvale, CA (US)
Filed on Nov. 4, 2022, as Appl. No. 18/052,655.
Application 18/052,655 is a continuation of application No. 17/316,131, filed on May 10, 2021, granted, now 11,523,745.
Application 17/316,131 is a continuation of application No. 16/058,821, filed on Aug. 8, 2018, granted, now 11,026,593, issued on Jun. 8, 2021.
Application 16/058,821 is a continuation of application No. 15/418,328, filed on Jan. 27, 2017, granted, now 10,080,507, issued on Sep. 25, 2018.
Claims priority of provisional application 62/287,598, filed on Jan. 27, 2016.
Prior Publication US 2023/0115139 A1, Apr. 13, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G01R 29/12 (2006.01); A61B 5/05 (2021.01); A61B 5/00 (2006.01); G01R 29/08 (2006.01); A61B 5/08 (2006.01); A61B 5/024 (2006.01)
CPC A61B 5/05 (2013.01) [A61B 5/725 (2013.01); A61B 5/7228 (2013.01); A61B 5/7278 (2013.01); A61B 5/742 (2013.01); G01R 29/0814 (2013.01); A61B 5/024 (2013.01); A61B 5/0816 (2013.01); A61B 5/7225 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A system comprising:
an electric field generator comprising an oscillator oscillating at a frequency, the electric field generator establishing an electric field around a desired area of detection that includes a body being monitored;
a demodulator coupled to an output of the electric field generator and outputting a signal indicative of a change in a frequency of the generated electric field around the desired area of detection, wherein the demodulator multiplies the output of the electric field generator by a phase-shifted version of the output of the electric field generator, the phase-shifted version of the output of the electric field generator being generated by a resonant circuit; and
wherein characteristics of the body being monitored cause the change in the frequency of the generated electric field around the desired area of detection.