Abstract: The present disclosure generally relates to a physiological device (100) for an animal The physiological device (100) comprises: a housing (120) comprising a channel (122) therethrough; an attachment layer (140) disposed on the housing (120) for attaching the physiological device (100) to an integument portion (50) of the animal; and a sensor unit (160) comprising a set of physiological sensors (162) for measuring physiological signals from the animal integument portion (50), the sensor unit (160) engageable with the channel (122) for axial displacement within the channel (122), wherein when the device (100) is attached to the animal integument portion (50), the sensor unit (160) is axially displaceable within the channel (122) for adjusting contact with the animal integument portion (50) for measuring the physiological signals.

Abstract: A reflectance-based optical measurement device and a method for a reflectance-based optical measurement are provided. The device comprises an illumination and detection assembly configured to output light to a surface portion of a user for measurement and to detect the output light reflected from said surface portion of the user as a signal; a coupling member configured for coupling in a cableless configuration to a personal mobile processing device; a measurement surface configured to allow access to said measurement surface by the surface portion of the user; wherein said access is provided by the optical device being holderless such that the surface portion of the user is allowed access to said measurement surface from all directions in a single plane; and further wherein said coupling member is arranged to transmit the detected signal to the personal mobile processing device.

Abstract: A device and method for removal of ambient noise signal from a photoplethysmographic measurement is provided. The method comprises obtaining a first signal waveform based on detecting light based on a first light illumination; obtaining a second signal waveform based on detecting light based on a second light illumination; tuning the first light and second light illumination such that the maximum amplitudes of the first and second signal waveforms are maximized and within a predetermined saturation range, such that ambient light interference for the first and second signal waveforms is reduced; obtaining a third signal waveform based on detecting ambient light; obtaining respective maximum and minimum values of the first and the second signal waveforms; and deriving signal values of the first and second signal waveforms with the removal of ambient noise by subtracting AC and DC average values of the third signal waveform from the first and second signals.

Abstract: A method of measuring an artifact removed photoplethysmographic (PPG) signal and a measurement system for measuring an artifact removed photoplethysmographic (PPG) signal are provided. The method comprises obtaining a first set of PPG signals from a plurality of detectors at respective measurement sites using a first illumination; obtaining a second set of PPG signals from the plurality of detectors using a second illumination; obtaining at least two pairs of PPG signals, each pair comprising one PPG signal from the first set and one PPG signal from the second set, and for each pair, computing an artifact reference signal to obtain a candidate PPG signal; and choosing one of the candidate PPG signals as the artifact removed PPG signal.

Abstract: There is provided a sensing device comprising an electromagnetic wave emitter for emitting electromagnetic waves to a surface; an electromagnetic wave detector for detecting the emitted electromagnetic waves that are reflected from the surface; and a force transmitting member configured to transmit a force applied thereto for detection, wherein the force transmitting member is positioned relative to the electromagnetic wave emitter and electromagnetic wave detector to substantially prevent waves emitted by the electromagnetic wave emitter from travelling directly to the electromagnetic wave detector.

Abstract: An optical measurement device and a method for optical measurement are provided. The device comprises an illumination assembly configured to output light to a surface portion of a user for measurement; a detection assembly configured to detect the output light reflected from said surface portion of the user as a signal; an amplifier module coupled to the detection assembly configured to apply a gain to an AC component of the signal; a microcontroller coupled to the detection assembly configured to assess a DC voltage level of the signal; wherein the microcontroller is configured to control the light output at the illumination assembly based on said assessing the DC voltage level; and further wherein the microcontroller is configured to select a gain value for said applying the gain based on said assessing the DC voltage level. Specific embodiments of the device relate to a photoplethysmograph or pulse oximeter.

Abstract: An optical measurement device and method of use provides non-invasive physiological measurements from a predetermined location on a body part of a user. The optical measurement device provides an illumination and detection assembly configured to generate and detect light of a predetermined wavelength range in the form of a photoplethysmography (PPG) signal, as well as a pressure detection assembly configured to detect an amount of pressure applied to the measurement device by the user being measured. A feedback unit, such as a portable display device, provides the user real-time feedback of the detected PPG signal and level of applied pressure so that the user may adjust the amount of applied pressure to improve the quality of the detected PPG signal.

Abstract: A method of measuring an artefact removed photoplethysmographic (PPG) signal and a measurement system for measuring an artefact removed photoplethysmographic (PPG) signal are provided. The method comprises obtaining a first set of PPG signals from a plurality of detectors at respective measurement sites using a first illumination; obtaining a second set of PPG signals from the plurality of detectors using a second illumination; obtaining at least two pairs of PPG signals, each pair comprising one PPG signal from the first set and one PPG signal from the second set, and for each pair, computing an artefact reference signal to obtain a candidate PPG signal; and choosing one of the candidate PPG signals as the artefact removed PPG signal.

Abstract: There is provided a sensing device comprising an electromagnetic wave emitter for emitting electromagnetic waves to a surface; an electromagnetic wave detector for detecting the emitted electromagnetic waves that are reflected from the surface; and a force transmitting member configured to transmit a force applied thereto for detection, wherein the force transmitting member is positioned relative to the electromagnetic wave emitter and electromagnetic wave detector to substantially prevent waves emitted by the electromagnetic wave emitter from travelling directly to the electromagnetic wave detector.

Abstract: A reflectance-based optical measurement device and a method for a reflectance-based optical measurement are provided. The device comprises an illumination and detection assembly configured to output light to a surface portion of a user for measurement and to detect the output light reflected from said surface portion of the user as a signal; a coupling member configured for coupling in a cableless configuration to a personal mobile processing device; a measurement surface configured to allow access to said measurement surface by the surface portion of the user; wherein said access is provided by the optical device being holderless such that the surface portion of the user is allowed access to said measurement surface from all directions in a single plane; and further wherein said coupling member is arranged to transmit the detected signal to the personal mobile processing device.

Abstract: A device and method for removal of ambient noise signal from a photoplethysmographic measurement is provided. The method comprises obtaining a first signal waveform based on detecting light based on a first light illumination; obtaining a second signal waveform based on detecting light based on a second light illumination; tuning the first light and second light illumination such that the maximum amplitudes of the first and second signal waveforms are maximised and within a predetermined saturation range, such that ambient light interference for the first and second signal waveforms is reduced; obtaining a third signal waveform based on detecting ambient light; obtaining respective maximum and minimum values of the first and the second signal waveforms; and deriving signal values of the first and second signal waveforms with the removal of ambient noise by subtracting AC and DC average values of the third signal waveform from the first and second signals.

Abstract: An optical measurement device and a method for optical measurement are provided. The device comprises an illumination assembly configured to output light to a surface portion of a user for measurement; a detection assembly configured to detect the output light reflected from said surface portion of the user as a signal; an amplifier module coupled to the detection assembly configured to apply a gain to an AC component of the signal; a microcontroller coupled to the detection assembly configured to assess a DC voltage level of the signal; wherein the microcontroller is configured to control the light output at the illumination assembly based on said assessing the DC voltage level; and further wherein the microcontroller is configured to select a gain value for said applying the gain based on said assessing the DC voltage level. Specific embodiments of the device relate to a photoplethysmograph or pulse oximeter.

Abstract: An optical measurement device and method of use provides non-invasive physiological measurements from a predetermined location on a body part of a user. The optical measurement device provides an illumination and detection assembly configured to generate and detect light of a predetermined wavelength range in the form of a photoplethysmography (PPG) signal, as well as a pressure detection assembly configured to detect an amount of pressure applied to the measurement device by the user being measured. A feedback unit, such as a portable display device, provides the user real-time feedback of the detected PPG signal and level of applied pressure so that the user may adjust the amount of applied pressure to improve the quality of the detected PPG signal.