A single volume soft sensor capable of sensing real-time continuous contact and stretching. A low-cost and an easy method to fabricate such piezoresistive elastomer-based soft sensors for instant interactions is also provided. An electrical impedance tomography (EIT) technique is employed to estimate changes of resistance distribution on the sensor caused by fingertip contact. To compensate for the rebound elasticity of the elastomer and achieve real-time contact sensing, an adaptive baseline update for EIT is utilized. The baseline updates are triggered by fingertip contact and movement detections.

A non-invasive and convenient method and apparatus for approximation of left ventricular end diastolic pressure (LVEDP) can be used in both hospital/clinic environments and nursing home or home environments. The method and apparatus use non-invasive sensors and a new “cardiac triangle” computational method to obtain an approximation of LVEDP. The computational method uses hemodynamic and electrocardiogram (ECG) waveforms as input, which can be collected by a portable device or devices.

A non-invasive and convenient method and apparatus for approximation of left ventricular end diastolic pressure (LVEDP) can be used in both hospital/clinic environments and nursing home or home environments. The method and apparatus use non-invasive sensors and a new “cardiac triangle” computational method to obtain an approximation of LVEDP. The computational method uses hemodynamic and electrocardiogram (ECG) waveforms as input, which can be collected by a portable device or devices.

A belt to be mounted around a measurement site; first pulse wave sensor and second pulse wave sensor mounted on the belt, separated from each other, configured to detect pulse waves in an artery passing through the measurement site; and pressing member mounted on the belt, capable of pressing first pulse wave sensor and second pulse wave sensor against the measurement site while varying pressing force. Time difference between first and second pulse wave signals is acquired as pulse transit time. Blood pressure is calculated based on the pulse transit time acquired by the measurement processing unit by using a predetermined correspondence equation between pulse transit time and blood pressure. Pulse transit time is acquired with the measurement processing unit while pressing force by pressing member is changed in resting state, and corresponding equation is calibrated based on plurality of pulse transit times corresponding to plurality of respective pressing forces.

A belt to be mounted around a measurement site; first pulse wave sensor and second pulse wave sensor mounted on the belt, separated from each other, configured to detect pulse waves in an artery passing through the measurement site; and pressing member mounted on the belt, capable of pressing first pulse wave sensor and second pulse wave sensor against the measurement site while varying pressing force. Time difference between first and second pulse wave signals is acquired as pulse transit time. Blood pressure is calculated based on the pulse transit time acquired by the measurement processing unit by using a predetermined correspondence equation between pulse transit time and blood pressure. Pulse transit time is acquired with the measurement processing unit while pressing force by pressing member is changed in resting state, and corresponding equation is calibrated based on plurality of pulse transit times corresponding to plurality of respective pressing forces.

An electronic device includes a memory and a controller configured to acquire a pulse wave of a subject measured by a first sensor in a non-invasive manner, analyze the acquired pulse wave to extract pulse waveform features of the subject, acquire a blood pressure level of the subject measured by a second sensor in a non-invasive manner, apply the extracted pulse waveform features and the acquired blood pressure level to an estimation formula stored in the memory to yield a blood glucose level or lipid level of the subject, and output information including the yielded blood glucose level or lipid level to a speaker, a display device, or a mobile terminal, which is configured to notify the subject of the outputted information, thereby enabling the subject to routinely manage their own state of health without collecting a blood sample.

An electronic device includes a memory and a controller configured to acquire a pulse wave of a subject measured by a first sensor in a non-invasive manner, analyze the acquired pulse wave to extract pulse waveform features of the subject, acquire a blood pressure level of the subject measured by a second sensor in a non-invasive manner, apply the extracted pulse waveform features and the acquired blood pressure level to an estimation formula stored in the memory to yield a blood glucose level or lipid level of the subject, and output information including the yielded blood glucose level or lipid level to a speaker, a display device, or a mobile terminal, which is configured to notify the subject of the outputted information, thereby enabling the subject to routinely manage their own state of health without collecting a blood sample.

A sensing structure and a method of fabricating a sensing structure for a compressive-type pressure sensor. The method comprises the steps of providing an elastic micropatterned substrate defining a plurality of 3-dimensional microstructures, each microstructure comprising a tip portion pointing away from the substrate in a first direction; forming a conductive film on the elastic micropatterned substrate such that the 3-dimensional microstructures are substantially covered by the conductive film; and forming cracks in the conductive film in areas on 3-dimensional microstructures.

A measurement sensor package and a measurement sensor reduce susceptibility to noise and enable highly accurate measurement. A measurement sensor package includes a substrate. The substrate includes a first recess including a first bottom surface on which a light emitter is mountable, and a first step surface having a first connection pad thereon, a second recess including a second bottom surface on which a light receiver is mountable, and a second step surface having a second connection pad thereon. In a direction connecting a center of the first bottom surface and a center of the second bottom surface in a plan view, the first step surface is located outward from the first bottom surface and the second step surface is located outward from the second bottom surface.

A measurement sensor package and a measurement sensor reduce susceptibility to noise and enable highly accurate measurement. A measurement sensor package includes a substrate. The substrate includes a first recess including a first bottom surface on which a light emitter is mountable, and a first step surface having a first connection pad thereon, a second recess including a second bottom surface on which a light receiver is mountable, and a second step surface having a second connection pad thereon. In a direction connecting a center of the first bottom surface and a center of the second bottom surface in a plan view, the first step surface is located outward from the first bottom surface and the second step surface is located outward from the second bottom surface.