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公开(公告)号：US20210341595A1
公开(公告)日：2021-11-04
申请号：US17092920
申请日：2020-11-09
Applicant: NATIONAL SUN YAT-SEN UNIVERSITY
Inventor： Shiang-Hwua Yu , Tzyy-Sheng Horng , Wei-Chih Su
Abstract: A digital self-injection-locked (SIL) radar includes a digital SIL oscillator, a wireless signal transceiver and a digital frequency demodulator. The digital SIL oscillator generates a digital output signal. The wireless signal transceiver is electrically connected to the digital SIL oscillator to convert the digital output signal into a wireless signal for transmission to a target, receives a reflected signal from the target, and converts the reflected signal into a digital injection signal for injection into the digital SIL oscillator. Accordingly, the digital SIL oscillator operates in an SIL state and generates a digital oscillation signal. The digital frequency demodulator is electrically connected to the digital SIL oscillator to receive and demodulate the digital oscillation signal into a digital demodulation signal.
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公开(公告)号：US20210109208A1
公开(公告)日：2021-04-15
申请号：US17064707
申请日：2020-10-07
Applicant: NATIONAL SUN YAT-SEN UNIVERSITY
Inventor： Tzyy-Sheng Horng , Fu-Kang Wang , Wei-Chih Su , Mu-Cyun Tang , Rezki El Arif
Abstract: A multiple-target vital sign detector includes a self-injection-locked oscillator (SILO), a chirp up/down converter, a frequency demodulator and a multiple-target vital sign processor. The chirp up/down converter performs conversion from an oscillation signal generated by the SILO to a frequency-modulated continuous wave (FMCW) signal to detect an area and from a received FMCW signal reflected from the area to an injection signal, while the SILO is injected with the injection signal to enter a self-injection-locked state. The locations and vital signs of multiple subjects are extracted from the oscillation signal using the frequency demodulator and the multiple-target vital sign processor. The objective of using the SILO is to improve the sensitivity of the FMCW detection process so as to more effectively distinguish the vital signs of multiple subjects at different locations.
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Patent Agency Ranking
公开(公告)号：US20230228864A1
公开(公告)日：2023-07-20
申请号：US17971697
申请日：2022-10-24
Applicant: NATIONAL SUN YAT-SEN UNIVERSITY
Inventor： Tzyy-Sheng Horng , Wei-Chih Su , Xuan-Xin Wu , Mu-Cyun Tang
IPC: G01S13/524 , G01S13/56 , G01S7/292 , G01S7/41
CPC classification number: G01S13/524 , G01S13/56 , G01S7/2921 , G01S7/415
Abstract: A SIL monopulse radar includes a self-injection-locking oscillator (SILO), a transmit antenna, two receive antennas, a hybrid coupler, a first demodulator, a second demodulator and a processor. The transmit antenna transmits the oscillation signal of the SILO to object. The two receive antennas receive a reflected signal from the object as a first echo signal and a second echo signal. The hybrid coupler outputs a difference signal and a sum signal. The difference signal is injected into the SILO. The first demodulator frequency-demodulates the oscillation signal to produce a first demodulated signal. The second demodulator phase-demodulates the sum signal by using the oscillation signal as a reference signal to produce a second demodulated signal. The processor processes the first and second demodulated signals to produce a monopulse ratio signal. The SIL monopulse radar can identify the posture and motion of a human body by analyzing the monopulse ratio signal.
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公开(公告)号：US11360189B2
公开(公告)日：2022-06-14
申请号：US17106315
申请日：2020-11-30
Applicant: NATIONAL SUN YAT-SEN UNIVERSITY
Inventor： Tzyy-Sheng Horng , Shiang-Hwua Yu , Kang-Chun Peng , Wei-Chih Su
Abstract: A phase-tracking self-injection-locked (SIL) radar includes an SIL oscillator, a phase-tracking SIL loop and a frequency-locked loop. The SIL oscillator generates an electrical oscillation signal and receives an electrical injection signal related to the electrical oscillation signal for self-injection locking. The phase-tracking SIL loop receives the electrical oscillation signal and outputs the electrical injection signal to the SIL oscillator with a constant phase difference between the electrical oscillation signal and the electrical injection signal. The frequency-locked loop receives the electrical oscillation signal and produces an electrical control signal to control the phase-tracking SIL loop or the SIL oscillator for eliminating the frequency shift of the SIL oscillator caused by the phase-tracking SIL loop. Accordingly, the phase difference between the electrical oscillation signal and the electrical injection signal is maintained at 0° or 180° such that the phase-tracking SIL radar operates at optimal detection points.
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公开(公告)号：US11662453B2
公开(公告)日：2023-05-30
申请号：US17092920
申请日：2020-11-09
Applicant: NATIONAL SUN YAT-SEN UNIVERSITY
Inventor： Shiang-Hwua Yu , Tzyy-Sheng Horng , Wei-Chih Su
IPC: G01S7/35 , G01S13/86 , G01S13/536 , A61B5/0205 , G01S13/88
CPC classification number: G01S13/536 , G01S7/352 , G01S7/354 , G01S13/862 , A61B5/0205 , G01S13/88
Abstract: A digital self-injection-locked (SIL) radar includes a digital SIL oscillator, a wireless signal transceiver and a digital frequency demodulator. The digital SIL oscillator generates a digital output signal. The wireless signal transceiver is electrically connected to the digital SIL oscillator to convert the digital output signal into a wireless signal for transmission to a target, receives a reflected signal from the target, and converts the reflected signal into a digital injection signal for injection into the digital SIL oscillator. Accordingly, the digital SIL oscillator operates in an SIL state and generates a digital oscillation signal. The digital frequency demodulator is electrically connected to the digital SIL oscillator to receive and demodulate the digital oscillation signal into a digital demodulation signal.
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公开(公告)号：US20220128651A1
公开(公告)日：2022-04-28
申请号：US17106315
申请日：2020-11-30
Applicant: NATIONAL SUN YAT-SEN UNIVERSITY
Inventor： Tzyy-Sheng Horng , Shiang-Hwua Yu , Kang-Chun Peng , Wei-Chih Su
Abstract: A phase-tracking self-injection-locked (SIL) radar includes an SIL oscillator, a phase-tracking SIL loop and a frequency-locked loop. The SIL oscillator generates an electrical oscillation signal and receives an electrical injection signal related to the electrical oscillation signal for self-injection locking. The phase-tracking SIL loop receives the electrical oscillation signal and outputs the electrical injection signal to the SIL oscillator with a constant phase difference between the electrical oscillation signal and the electrical injection signal. The frequency-locked loop receives the electrical oscillation signal and produces an electrical control signal to control the phase-tracking SIL loop or the SIL oscillator for eliminating the frequency shift of the SIL oscillator caused by the phase-tracking SIL loop. Accordingly, the phase difference between the electrical oscillation signal and the electrical injection signal is maintained at 0° or 180° such that the phase-tracking SIL radar operates at optimal detection points.
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公开(公告)号：US11835618B2
公开(公告)日：2023-12-05
申请号：US17064707
申请日：2020-10-07
Applicant: NATIONAL SUN YAT-SEN UNIVERSITY
Inventor： Tzyy-Sheng Horng , Fu-Kang Wang , Wei-Chih Su , Mu-Cyun Tang , Rezki El Arif
CPC classification number: G01S13/89 , A61B5/05 , G01S7/35 , A61B5/0205 , A61B5/02444 , A61B5/0816
Abstract: A multiple-target vital sign detector includes a self-injection-locked oscillator (SILO), a chirp up/down converter, a frequency demodulator and a multiple-target vital sign processor. The chirp up/down converter performs conversion from an oscillation signal generated by the SILO to a frequency-modulated continuous wave (FMCW) signal to detect an area and from a received FMCW signal reflected from the area to an injection signal, while the SILO is injected with the injection signal to enter a self-injection-locked state. The locations and vital signs of multiple subjects are extracted from the oscillation signal using the frequency demodulator and the multiple-target vital sign processor. The objective of using the SILO is to improve the sensitivity of the FMCW detection process so as to more effectively distinguish the vital signs of multiple subjects at different locations.
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