US 12,186,066 B2
Noncontact vital sign sensing device
Kang-Chun Peng, Kaohsiung (TW); Tzyy-Sheng Horng, Kaohsiung (TW); Fu-Kang Wang, Kaohsiung (TW); and Meng-Che Sung, New Taipei (TW)
Assigned to National Kaohsiung University of Science and Technology, Kaohsiung (TW)
Filed by National Kaohsiung University of Science and Technology, Kaohsiung (TW)
Filed on May 12, 2022, as Appl. No. 17/742,551.
Claims priority of application No. 111102497 (TW), filed on Jan. 20, 2022.
Prior Publication US 2023/0225626 A1, Jul. 20, 2023
Int. Cl. A61B 5/05 (2021.01)
CPC A61B 5/05 (2013.01) 10 Claims
OG exemplary drawing
 
1. A noncontact vital sign sensing device comprising:
an oscillator configured to output an oscillation signal;
a transmit antenna coupled to the oscillator and configured to receive and transmit the oscillation signal to a subject as a transmitted signal, a reflected signal is configured to be reflected from the subject;
a receive antenna configured to receive the reflected signal as a received signal;
a gain detector coupled to the oscillator and the receive antenna and configured to receive the oscillation signal and the received signal and configured to detect a gain of the oscillation signal relative to the received signal; and
a data acquisition unit electrically connected to the gain detector and configured to receive the gain and output a vital sign of the subject according to the gain,
wherein the gain is represented by an equation as follows:

OG Complex Work Unit Math
where VGD(s) represents an amplitude of the gain, Kgd represents a sensitivity of the gain detector, VTx(s) represents an amplitude of the oscillation signal, and VRx(s) represents an amplitude of the received signal.