Abstract: A wearable heart activity sensor device includes a substrate of optically transparent material arranged to face a skin of a user when the sensor device is worn by the user, at least one light emitting diode, LED, arranged on the substrate and arranged to emit light through the substrate, at least one photo sensor arranged on the substrate as spatially separated from the at least one LED and arranged to absorb light through the substrate, wherein the at least one LED and the at least one photo sensor are included in a photoplethysmogram sensor of the heart activity sensor device, and an overmold of thermoplastic material covering the at least one light emitting diode, the at least one photo sensor and a space between the at least one light emitting diode and the at least one photo sensor.

Abstract: An apparatus includes the following: a photoplethysmogram sensor head including a light emitter and a photo detector, wherein the photo detector is disposed in a diagonal orientation with respect to a light path from the light emitter to the light detector; and an opaque mask over the photo detector, wherein the mask covers at least partially that half of the photo detector that is at a greater distance from the light emitter and leaves a remaining half of the photo detector exposed.

Abstract: A method, apparatus, and computer program monitor a user's heart activity during a physical exercise. A heart activity measurement signal representing the user's heart activity is acquired and a phase component of the heart activity measurement signal is monitored. On the basis of the monitoring of the phase component, one or more actions are carried out.

Abstract: A method, apparatus, and computer program monitor a user's heart activity during a physical exercise. A heart activity measurement signal representing the user's heart activity is acquired and a phase component of the heart activity measurement signal is monitored. On the basis of the monitoring of the phase component, one or more actions are carried out.

Abstract: There is provided a wearable device for measuring cardiac activity of a user, the wearable device comprising: an optical cardiac activity sensor unit configured to be placed in contact with a measurement area and to enable cardiac activity measurement of the user to obtain a cardiac activity signal; a plurality of electrodes configured to enable bioimpedance measurement on the measurement area to obtain a bioimpedance signal; a detector unit for detecting changes in the bioimpedance signal; and a reducer unit for reducing a motion artefact effect on the cardiac activity signal based on the detected changes in the bioimpedance signal.

Abstract: A computer-implemented method estimates sleep quality of a user. A related computer system, a computer program product, and a data structure are also described.

Abstract: A computer-implemented method estimates sleep quality of a user. A related computer system, a computer program product, and a data structure are also described.

Abstract: A wearable heart activity sensor device includes a substrate of optically transparent material arranged to face a skin of a user when the sensor device is worn by the user; at least one light emitting diode, LED, arranged on the substrate and arranged to emit light through the substrate; at least one photo sensor arranged on the substrate as spatially separated from the at least one LED and arranged to absorb light through the substrate, wherein the at least one LED and the at least one photo sensor are included in a photoplethysmogram sensor of the heart activity sensor device; and an overmold of thermoplastic material covering the at least one light emitting diode, the at least one photo sensor and a space between the at least one light emitting diode and the at least one photo sensor.

Abstract: An apparatus is suitable for measuring a photoplethysmogram (PPG). A photoplethysmographic sensor apparatus may include a casing defining a surface, a plurality of optical emitters configured to emit radiation extending from the surface, at least one photo sensor configured to capture radiation emitted by at least a subset of the plurality of optical emitters. At least a first measurement configuration and a second configuration is defined by the plurality of optical emitters and the at least one photo sensor such that the first and the second measurement configuration provide different measurement channels by including at least partially different sets of at least one optical emitter and at least one photo sensor. The first and second measurement configurations define different spatial configurations, each of which is line symmetric with respect to an imaginary line along the surface.

Abstract: A heart activity sensor structure includes a flexible substrate being substantially non-conductive, at least two electrodes printed on one side of the flexible substrate and configured to be placed against a skin of a user in order to measure biometric signals related to heart activity, and an electrostatic discharge shield printed on opposite side the flexible textile substrate, compared to the printing of the at least two electrodes, for protecting the at least two electrodes from static electricity.

Abstract: There is provided a wearable device for measuring cardiac activity of a user, the wearable device comprising: an optical cardiac activity sensor unit configured to be placed in contact with a measurement area and to enable cardiac activity measurement of the user to obtain a cardiac activity signal; a plurality of electrodes configured to enable bioimpedance measurement on the measurement area to obtain a bioimpedance signal; a detector unit for detecting changes in the bioimpedance signal; and a reducer unit for reducing a motion artefact effect on the cardiac activity signal based on the detected changes in the bioimpedance signal. (FIG.

Abstract: An apparatus includes: a first layer including first and second measurement electrodes disposed at a distance from one another, wherein the first and second measurement electrodes are skin electrodes that measure an electric physiological property from a skin; and a second layer disposed on top of the first layer including first and a second shielding elements that are electrically conductive and arranged to cover at least partially both the first and second measurement electrodes to protect the first and second measurement electrode against electromagnetic interference. Each of the shielding elements are connected to a skin electrode. The first shielding element and the second shielding element extend adjacent with respect to one another between the first and second measurement electrodes on a plane defined by the second layer. The second shielding element is electrically isolated from the first shielding element.

Abstract: A solution for estimating motion of a user is disclosed. A method comprises: acquiring satellite positioning data received with a satellite positioning receiver attached to a human body and indicating a location of the satellite positioning receiver; extracting, from the satellite positioning data, local motion data representing local motion of the satellite positioning receiver with respect to a reference point and overall motion data representing the motion of the reference point, wherein the reference point is included in a framework of the human body; and determining, from the local motion data, a local motion trajectory of a part of a human body to which the satellite positioning receiver is attached with respect to the reference point.

Abstract: A heart activity sensor structure includes a flexible textile substrate, and at least two electrodes with an electric insulation between each of the at least two electrodes. The at least two electrodes are applied on one side of the flexible textile substrate and configured to be placed against a skin of an exerciser in order to measure biosignals related to heart activity. The heart activity sensor also includes an electrostatic discharge shield applied on one side of the flexible textile substrate for protecting the at least two electrodes from static electricity.

Abstract: A computer-implemented method estimates sleep quality of a user. A related computer system, a computer program product, and a data structure are also described.

Abstract: An apparatus includes: a first layer including first and second measurement electrodes disposed at a distance from one another, wherein the first and second measurement electrodes are skin electrodes that measure an electric physiological property from a skin; and a second layer disposed on top of the first layer including first and a second shielding elements that are electrically conductive and arranged to cover at least partially both the first and second measurement electrodes to protect the first and second measurement electrode against electromagnetic interference. Each of the shielding elements are connected to a skin electrode. The first shielding element and the second shielding element extend adjacent with respect to one another between the first and second measurement electrodes on a plane defined by the second layer. The second shielding element is electrically isolated from the first shielding element.

Abstract: There is provided a wearable item configured to be placed at least partially against a skin of a person; and an optically sensitive detector mounted to the wearable item and configured to detect optical signals reflected from the skin of the person, wherein the detected optical signals represent a relative motion between the wearable item and the skin of the person and wherein the optically sensitive detector is mounted to the wearable item such that there is a predetermined space between the optically sensitive detector and the skin of the person.

Abstract: An apparatus is suitable for measuring a photoplethysmogram (PPG). A photoplethysmographic sensor apparatus may include a casing defining a surface, a plurality of optical emitters configured to emit radiation extending from the surface, at least one photo sensor configured to capture radiation emitted by at least a subset of the plurality of optical emitters. At least a first measurement configuration and a second configuration is defined by the plurality of optical emitters and the at least one photo sensor such that the first and the second measurement configuration provide different measurement channels by including at least partially different sets of at least one optical emitter and at least one photo sensor. The first and second measurement configurations define different spatial configurations, each of which is line symmetric with respect to an imaginary line along the surface.

Abstract: A solution for estimating motion of a user is disclosed. A method comprises: acquiring satellite positioning data received with a satellite positioning receiver attached to a human body and indicating a location of the satellite positioning receiver; extracting, from the satellite positioning data, local motion data representing local motion of the satellite positioning receiver with respect to a reference point and overall motion data representing the motion of the reference point, wherein the reference point is included in a framework of the human body; and determining, from the local motion data, a local motion trajectory of a part of a human body to which the satellite positioning receiver is attached with respect to the reference point.

Abstract: A method, apparatus, and computer program monitor a user's heart activity during a physical exercise. A heart activity measurement signal representing the user's heart activity is acquired and a phase component of the heart activity measurement signal is monitored. On the basis of the monitoring of the phase component, one or more actions are carried out.