Patents by Inventor Fu-Kang WANG
Fu-Kang WANG has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10679043Abstract: A 3-D path detection system includes an image capture device, a radar device and a computing module. The image capture device is provided to produce a dynamic image for calculating the x- and y-direction (transverse) pixel-value displacements according to a captured moving object image. The radar device is configured to transmit an input wireless signal to a moving object and receive a reflection signal from the moving object, and is configured to calculate a z-direction (longitudinal) displacement of the moving object according to a Doppler shift in the reflection signal. The computing module is configured to construct a 3-D path of the moving object according to the x- and y-direction pixel-value displacements of the moving object image and the z-direction displacement of the moving object.Type: GrantFiled: January 15, 2018Date of Patent: June 9, 2020Assignee: NATIONAL SUN YAT-SEN UNIVERSITYInventors: Tzyy-Sheng Horng, Chia-Hung Yeh, Fu-Kang Wang, Mu-Cyun Tang, Chien-Lun Chen, Min-Hui Lin
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Publication number: 20200158858Abstract: In a life detection method of the present invention, a signal transceiver is configured to transmit a transmission signal to an area and receive a reflected signal from the area as a detection signal, a demodulator coupled to the signal transceiver is configured to receive and demodulate the detection signal to output a demodulated signal, a compute element coupled to the demodulator is configured to receive the demodulated signal and compute a RMS value of the demodulated signal, and a determination element coupled to the compute element is configured to receive the RMS value of the demodulated signal and determine whether having a living body within the area according to the RMS value and a RMS threshold value.Type: ApplicationFiled: June 5, 2019Publication date: May 21, 2020Inventors: Yi-Ting Tseng, Fu-Kang Wang, Sheng-You Tian
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Publication number: 20200103493Abstract: A signal demodulation device includes an IQ mixer, a differential element and a signal processor. The IQ mixer is configured to output a first mixed signal and a second mixed signal. The differential element is electrically connected to the IQ mixer for receiving the first and second mixed signals and configured to differentiate the first and second mixed signals and output a first derivative signal and a second derivative signal. The signal processor is electrically connected to the differential element for receiving the first and second derivative signals and configured to demodulate the first and second derivative signals and output a first demodulated signal.Type: ApplicationFiled: November 6, 2018Publication date: April 2, 2020Inventors: Fu-Kang Wang, Tzyy-Sheng Horng, Pin-Hsun Juan
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Patent number: 10601132Abstract: An active phase switchable array includes a plurality of antenna elements and a bias circuit. Each of the radar elements includes an antenna, a power coupling network and an injection-locked oscillator (ILO), and each of the antenna elements is coupled with each other through the power coupling networks for operating the ILO of each of the antenna elements in self- and mutual-injection-locked states. The antenna elements in self-injection-locked state are utilized to detect the vital signs of subjects, and the antenna elements in mutual-injection-locked state are utilized to produce phase difference between the radiating signals of the antenna elements for forming a beam. As a result, the active phase switchable array can simultaneously detect the vital signs of multiple subjects.Type: GrantFiled: September 5, 2017Date of Patent: March 24, 2020Assignee: NATIONAL SUN YAT-SEN UNIVERSITYInventors: Fu-Kang Wang, Tzyy-Sheng Horng, Lih-Tynh Hwang, Chung-Yi Hsu, Cho-Ying Chuang
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Publication number: 20200022656Abstract: In a method for detection of vital sign signal, a variation detection module is configured to determine whether there is a living body in an image captured by an image capture module, next, a beam direction of a vital sign sensing system is directed toward the living body to detect vital sign signal of the living body, and a compute module is configured to compute eigenvalue and confidence of the vital sign signal so as to reconfirm whether the determined living body in the image is a living body having vital signs.Type: ApplicationFiled: May 22, 2019Publication date: January 23, 2020Inventors: Sheng-You Tian, Fu-Kang Wang
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Patent number: 10506981Abstract: A vital sign detection system includes a radar device, a nonreciprocal network, a first antenna and a second antenna. An output signal from the radar device is delivered to the first antenna via the nonreciprocal network and then transmitted to a first side of a biological subject via the first antenna. A first reflection signal from the first side of the biological subject is received by the first antenna and then delivered to the second antenna via the nonreciprocal network and then transmitted to a second side of the biological subject via the second antenna. A second reflection signal from the second side of the biological subject is received by the second antenna and then delivered to the radar device via the nonreciprocal network for vital sign detection with random body movement cancellation.Type: GrantFiled: November 9, 2017Date of Patent: December 17, 2019Assignee: NATIONAL SUN YAT-SEN UNIVERSITYInventors: Tzyy-Sheng Horng, Fu-Kang Wang, Mu-Cyun Tang
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Publication number: 20190377080Abstract: In a vital sign sensor of the present invention, an antenna assembly radiates an oscillation signal generated by a SIL oscillator to an object in a form of a wireless signal and receives a reflected signal from the object, and the reflected signal can have the SIL oscillator injection-locked. The wireless signal radiated from the antenna assembly is transmitted to a demodulator for demodulation such that the vital signs of the object can be obtained. Additionally, an isolator of the antenna assembly is provided to prevent the SIL oscillator from receiving a clutter reflected from the demodulator and an environment where the demodulator is placed. As a result, the clutter can't influence the vital sign detection of the object.Type: ApplicationFiled: August 21, 2018Publication date: December 12, 2019Inventors: Fu-Kang Wang, Tzyy-Sheng Horng, Lih-Tyng Hwang, Chung-Yi Hsu
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Publication number: 20190365244Abstract: In non-contact pulse transit time measurement system of the present invention, two continuous-wave radars are provided to detect movements at two positions on a subject for use in measuring pulse transit time. The measurement of the pulse transit time can be continuous and last for a long time because there is no contact to skin necessary.Type: ApplicationFiled: April 10, 2019Publication date: December 5, 2019Inventors: Tzyy-Sheng Horng, Fu-Kang Wang, Mu-Cyun Tang, Chien-Min Liao
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Patent number: 10281561Abstract: A quadrature self-injection-locked radar utilizes a phase shifter to make a oscillation signal operating in two phase modes, and utilizes a frequency demodulator for frequency demodulation and a signal processor for signal processing to eliminate the nonlinear distortion caused by self-injection locked phenomenon. Therefore, the self-injection locked radar can be applied to more cases for detecting displacement variations with any range.Type: GrantFiled: April 19, 2017Date of Patent: May 7, 2019Assignee: NATIONAL SUN YAT-SEN UNIVERSITYInventors: Fu-Kang Wang, Tzyy-Sheng Horng, Mu-Cyun Tang
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Publication number: 20180357474Abstract: A 3-D path detection system includes an image capture device, a radar device and a computing module. The image capture device is provided to produce a dynamic image for calculating the x- and y-direction (transverse) pixel-value displacements according to a captured moving object image. The radar device is configured to transmit an input wireless signal to a moving object and receive a reflection signal from the moving object, and is configured to calculate a z-direction (longitudinal) displacement of the moving object according to a Doppler shift in the reflection signal. The computing module is configured to construct a 3-D path of the moving object according to the x- and y-direction pixel-value displacements of the moving object image and the z-direction displacement of the moving object.Type: ApplicationFiled: January 15, 2018Publication date: December 13, 2018Inventors: Tzyy-Sheng Horng, Chia-Hung Yeh, Fu-Kang Wang, Mu-Cyun Tang, Chien-Lun Chen, Min-Hui Lin
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Publication number: 20180338730Abstract: A vital sign detection system includes a radar device, a nonreciprocal network, a first antenna and a second antenna. An output signal from the radar device is delivered to the first antenna via the nonreciprocal network and then transmitted to a first side of a biological subject via the first antenna. A first reflection signal from the first side of the biological subject is received by the first antenna and then delivered to the second antenna via the nonreciprocal network and then transmitted to a second side of the biological subject via the second antenna. A second reflection signal from the second side of the biological subject is received by the second antenna and then delivered to the radar device via the nonreciprocal network for vital sign detection with random body movement cancellation.Type: ApplicationFiled: November 9, 2017Publication date: November 29, 2018Inventors: Tzyy-Sheng Horng, Fu-Kang Wang, Mu-Cyun Tang
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Publication number: 20180224526Abstract: A quadrature self-injection-locked radar utilizes a phase shifter to make a oscillation signal operating in two phase modes, and utilizes a frequency demodulator for frequency demodulation and a signal processor for signal processing to eliminate the nonlinear distortion caused by self-injection locked phenomenon. Therefore, the self-injection locked radar can be applied to more cases for detecting displacement variations with any range.Type: ApplicationFiled: April 19, 2017Publication date: August 9, 2018Inventors: Fu-Kang Wang, Tzyy-Sheng Horng, Mu-Cyun Tang
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Publication number: 20180083358Abstract: An active phase switchable array includes a plurality of antenna elements and a bias circuit. Each of the radar elements includes an antenna, a power coupling network and an injection-locked oscillator (ILO), and each of the antenna elements is coupled with each other through the power coupling networks for operating the ILO of each of the antenna elements in self- and mutual-injection-locked states. The antenna elements in self-injection-locked state are utilized to detect the vital signs of subjects, and the antenna elements in mutual-injection-locked state are utilized to produce phase difference between the radiating signals of the antenna elements for forming a beam. As a result, the active phase switchable array can simultaneously detect the vital signs of multiple subjects.Type: ApplicationFiled: September 5, 2017Publication date: March 22, 2018Inventors: Fu-Kang Wang, Tzyy-Sheng Horng, Lih-Tynh Hwang, Chung-Yi Hsu, Cho-Ying Chuang
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Patent number: 9846226Abstract: A motion detection device is provided. The motion detection device includes a first antenna, a voltage-controlled oscillator, a phase detector and a signal processing unit. The first antenna receives a first signal generated by a second signal reflected by a target object, so as to output the first signal to the phase detector or the voltage-controlled oscillator. The voltage-controlled oscillator receives first signal or the second signal and receives a frequency adjustment signal, so as to generate an oscillating signal according to the frequency adjustment signal and the one of the first signal and the second signal. The phase detector receives the oscillating signal and another one of the first signal and the second signal, and generates a first phase output signal and a second phase output signal. The signal processing unit estimates motion parameters of the target object according to the first and the second phase output signal.Type: GrantFiled: March 22, 2015Date of Patent: December 19, 2017Assignee: National Sun Yat-sen UniversityInventors: Tzyy-Sheng Horng, Fu-Kang Wang, Yen-Chen Chiu
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Patent number: 9603555Abstract: A motion/vibration detection system and method therefore are provided. The system includes a transmitter and a receiver. The transmitter includes a transmit/receive antenna unit and a first oscillator. The receiver includes a receiving unit and a demodulation unit. The transmit/receive antenna unit receives an output signal from the first oscillator and transmits a detection signal. The detection signal is reflected from at least one object under detection into a reflected detection signal, which is received by the transmit/receive antenna unit. The transmit/receive antenna unit injects the reflected detection signal into the first oscillator and accordingly the first oscillator is under a self-injection locking mode. The receiving unit receives the detection signal. The demodulation unit demodulates the detection signal received by the receiving unit into a baseband output signal, to extract at least one motion/vibration information of the objection under detection.Type: GrantFiled: January 14, 2014Date of Patent: March 28, 2017Assignees: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE, NATIONAL SUN YAT-SEN UNIVERSITYInventors: Tzyy-Sheng Horng, Fu-Kang Wang, Kang-Chun Peng
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Patent number: 9423496Abstract: A wireless detection device is provided, comprising a voltage control oscillation unit, a transceiving unit, demodulation unit and processing unit. The voltage control oscillation unit generates different oscillation signals according to analog control voltages and corresponding injection signals. The transceiving unit outputs first wireless signals to a predetermined area according to the oscillation signals and receives second wireless signals generated by reflection of the first wireless signals to generate the injection signal. The demodulation unit demodulates the oscillation signals into first voltage signals. The processing unit subtracts the corresponding analog control voltages from the first voltage signals to generate second voltage signals, and when the variation of the second voltage signals exceeds a predetermined value on a target frequency in frequency domain, the processing unit calculates a real distance between an object and the transceiving unit.Type: GrantFiled: March 6, 2013Date of Patent: August 23, 2016Assignee: NATIONAL SUN YAT-SEN UNIVERSITYInventors: Tzyy-Sheng Horng, Fu-Kang Wang, Kang-Chun Peng
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Publication number: 20160187475Abstract: A motion detection device is provided. The motion detection device includes a first antenna, a voltage-controlled oscillator, a phase detector and a signal processing unit. The first antenna receives a first signal generated by a second signal reflected by a target object, so as to output the first signal to the phase detector or the voltage-controlled oscillator. The voltage-controlled oscillator receives first signal or the second signal and receives a frequency adjustment signal, so as to generate an oscillating signal according to the frequency adjustment signal and the one of the first signal and the second signal. The phase detector receives the oscillating signal and another one of the first signal and the second signal, and generates a first phase output signal and a second phase output signal. The signal processing unit estimates motion parameters of the target object according to the first and the second phase output signal.Type: ApplicationFiled: March 22, 2015Publication date: June 30, 2016Inventors: Tzyy-Sheng Horng, Fu-Kang Wang, Yen-Chen Chiu
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Patent number: 9375153Abstract: A motion/vibration sensor includes a transmit/receive antenna unit, an oscillation unit and a frequency-mixing unit. The transmit/receive antenna unit receives an output signal from the oscillation unit and transmits a detection signal toward at least one object. The detection signal is reflected by the object as a reflected detection signal and received by the transmit/receive antenna unit. The oscillation unit receives the reflected detection signal from the transmit/receive antenna unit for self-injection locking; and the frequency-mixing unit receives the reflected detection signal from the transmit/receive antenna unit for frequency demodulation. The frequency-mixing unit mixes and demodulates the reflected detection signal from the transmit/receive antenna unit with the output signal from the oscillation unit into a baseband output signal which represents a motion/vibration information.Type: GrantFiled: January 10, 2014Date of Patent: June 28, 2016Assignees: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE, NATIONAL SUN YAT-SEN UNIVERSITYInventors: Tzyy-Sheng Horng, Fu-Kang Wang, Kang-Chun Peng
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Patent number: 8890590Abstract: A wideband frequency synthesizer and a frequency synthesizing method thereof are provided. The wideband frequency synthesizer includes a phase-locked loop unit, a first voltage-controlled oscillating unit and a first frequency mixer unit. The phase-locked loop unit receives a reference signal and a feedback signal and generates a first oscillating signal according to the reference signal and the feedback signal. The first voltage-controlled oscillating unit generates a second oscillating signal. The first frequency mixer is coupled to the phase-locked loop unit and the first voltage-controlled oscillating unit, receives the first oscillating signal and the second oscillating signal for mixing frequencies of the first oscillating signal and the second oscillating signal to generate an output signal and taking the output signal as the feedback signal for outputting to the phase-locked loop unit.Type: GrantFiled: August 8, 2013Date of Patent: November 18, 2014Assignee: National Sun Yat-sen UniversityInventors: Tzyy-Sheng Horng, Kang-Chun Peng, Fu-Kang Wang
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Publication number: 20140327478Abstract: A wideband frequency synthesizer and a frequency synthesizing method thereof are provided. The wideband frequency synthesizer includes a phase-locked loop unit, a first voltage-controlled oscillating unit and a first frequency mixer unit. The phase-locked loop unit receives a reference signal and a feedback signal and generates a first oscillating signal according to the reference signal and the feedback signal. The first voltage-controlled oscillating unit generates a second oscillating signal. The first frequency mixer is coupled to the phase-locked loop unit and the first voltage-controlled oscillating unit, receives the first oscillating signal and the second oscillating signal for mixing frequencies of the first oscillating signal and the second oscillating signal to generate an output signal and taking the output signal as the feedback signal for outputting to the phase-locked loop unit.Type: ApplicationFiled: August 8, 2013Publication date: November 6, 2014Applicant: National Sun Yat-sen UniversityInventors: Tzyy-Sheng Horng, Kang-Chun Peng, Fu-Kang Wang