National Taiwan University

Taipei Medical University

Sil Radar Technology Inc.

Chao-Hsiung Tseng

Li-Te Yu

San-Liang Lee

Cheng-Hsien Chen

Ling-Hsiu Hung

Chih-Lin Chang

Cheng-Zhou Wu

Yi-Hua Lin

Yung-Ho Hsu

Tzu-Jung Tseng

Jyun-Kai Huang

A non-contact blood pressure measurement system and a non-contact blood pressure value calculation method thereof are disclosed. The non-contact blood pressure measurement system includes a measurement module, a signal processing module, and a calculation module. The measurement module measures a physiological signal of a subject being tested in a non-contact manner. The signal processing module is used to obtain a forward pressure wave and a backward pressure wave according to the physiological signal of the subject being tested. The calculation module is used to find out a reflected pulse transit time between the forward pressure wave and the backward pressure wave so as to substitute the reflected pulse transit time and a plurality of correction parameters into a blood pressure algorithm formula to calculate an estimated diastolic blood pressure and an estimated systolic blood pressure of the subject being tested.

Non-contact blood pressure measurement system and non-contact blood pressure value calculation method thereof

A physiological signal sensor, comprising a self-oscillating complementary split-ring resonator (SO-CSRR), a demodulator and a microcontroller (MCU). The SO-CSRR detects a physiological signal and outputs a modulated signal, the demodulator receives the modulated signal and outputs a pulse physiological signal, the baseband amplifier receives the pulse physiological signal and outputs an amplified pulse physiological signal, and the MCU receives the amplified pulse physiological signal and outputs a digital signal.

Perturbation-injection-locked physiological signal sensor

A non-contact phase-locked and self-injection-locked vital sign sensor includes a self-oscillating voltage-controlled frequency-adjustable radiating element and a phase-locked loop. The self-oscillating voltage-controlled frequency-adjustable radiating element is used for transmitting an oscillation signal to an organism and for receiving a corresponding reflected signal from the organism to be posed at a self-injection-locked state, the oscillation signal being tuned by a vital sign of the organism to form a frequency-tuned signal. The phase-locked loop is used for demodulating the frequency-tuned signal to obtain a corresponding vital signal of the organism. By comparing the oscillation signal frequency-eliminated and outputted from the self-oscillating voltage-controlled frequency-adjustable radiating element with a reference signal, a corresponding comparison result is used to vary a phase of the frequency-divided oscillation signal for maintaining the same phase of the reference signal. Thereupon, the oscillation frequency can be stabilized, and the measurement sensitivity can be enhanced.

Non-contact phase-locked and self-injection-locked vital sign sensor

A non-contact self-injection-locked vital sign sensor is disclosed, which includes transmitting antenna, receiving antenna, self-injection-locked integrated circuit and demodulator. The self-injection-locked integrated circuit includes voltage-controlled oscillator, mixer, two amplifiers and harmonic-frequency power combiner. A frequency-multiplied signal is produced by amplifiers and harmonic-frequency power combiner then transmitted to a living body by transmitting antenna. A frequency-divided signal is produced by voltage-controlled oscillator and mixer then transmitted to voltage-controlled oscillator, then a frequency- and amplitude-modulated signal is produced by the voltage-controlled oscillator then transmitted to demodulator to produce a vital sign. So as to detect vital sign with a higher frequency to increase measurement sensitivity by using a low-cost integrated circuit process. A centrifugal compressor includes a volute base block, a volute cover plate, an impeller, a diffuser-adjusting assembly, a radial constraint assembly, an axial constraint assembly and a driving assembly.

Non-contact self-injection-locked vital sign sensor

A far-infrared emitters with physiological signal detection and method of operating the same is disclosed. A far-infrared beam module is switched on and generates far-infrared beam irradiating to a human body when a control unit starting up a microwave detecting module detecting physiological signal of the human body. The control unit is switched off when the time that the far-infrared beam irradiating on the human body reach a presetting period of time, thereby achieving the purpose of energy conservation.

Far-infrared emitters with physiological signal detection and method of operating the same

In a noncontact self-injection-locked sensor, a self-injection-locked oscillating integrated antenna is designed to radiate a signal to a subject and be injection-locked by a reflect signal reflected from the subject. Owing to the reflect signal is phase-modulated by vital signs of the subject, a demodulator is provided to demodulate an injection-locked signal of the self-injection-locked oscillating integrated antenna to obtain a vital signal of the subject.

Growing community of inventors

Taipei, Taiwan

Chao-Hsiung Tseng