Abstract: A monopolar physiological signal detection device and a method of operating the monopolar physiological signal detection device are provided. With a differential amplifier, a delay circuit, a driven-body circuit, and a band-pass filter, the monopolar physiological signal detection device can reduce the common-mode interference induced by supply mains. Moreover, the monopolar physiological signal detection device employs a single electrode to generate electric potentials with different time factors from the same skin surface. Accordingly, consecutive heartbeat related information of a user can be collected even when the user is under natural and comfortable postures.

Abstract: A monopolar physiological signal detection device and a method of operating the monopolar physiological signal detection device are provided. With a differential amplifier, a delay circuit, a driven-body circuit, and a band-pass filter, the monopolar physiological signal detection device can reduce the common-mode interference induced by supply mains. Moreover, the monopolar physiological signal detection device employs a single electrode to generate electric potentials with different time factors from the same skin surface. Accordingly, consecutive heartbeat related information of a user can be collected even when the user is under natural and comfortable postures.

Abstract: An image-based PWV measurement device and method are provided. The measurement device comprises at least two light emitting units respectively projecting light beams to at least two detected regions on body surface; at least two light transmitting units respectively receiving and transmitting light signals measured at the different detected regions; an image sensing unit converting the light signals measured at the detected regions into image signals; a length measurement unit used to measure the distance between the detected regions; and an image analysis unit analyzing the image signals to obtain PPG signals for the detected regions. According to the PPG signals, the image analysis unit calculates the physiological parameters, including the perfusion index, respiration rate, pulse rate, stiffness index, reflection index, and PWV between the detected regions, which is derived according to the distance and the pulse transit time from the PPG signals of the two detected regions.

Abstract: The present invention discloses a PPG imaging device and a PPG measuring method. The PPG imaging device comprises a light emitting unit, a collimator unit, a beam splitter unit, an image sensing unit, and an image analysis unit. The light emitting unit provides an incident light signal. The collimator unit receives the incident light signal and transforms the incident light signal into a parallel light signal. The beam splitter unit receives the parallel light signal and reflects it to a tested region. The image sensing unit receives a reflected light signal reflected from the tested region and converts it into image signals. The image analysis unit connects with the image sensing unit and analyzes the image signals to obtain PPG signals of the tested region. The PPG imaging device may be arranged in an anti-light pollution unit, whereby to prevent from optical interference and obtain higher measurement precision.