One of the major focus for wearable technology revolution is keeping tabs on one’s health and fitness 24/7 by strapping on one of the latest fitness trackers. Consumers can imagine using these devices to not only track the calories they burn off or a number of steps they walk, but also monitor their vital signs such as blood sugar and blood pressure with ease and convenience.
Integrated Platform Streamlines The Vitals Measurement Process
Specializing in high-performance sensor solutions, ams has created an integrated wearable platform that streamlines the development of wearables for measurement of multiple vital signs. The design is well-suited for products such as fitness bands, smart watches, sports watches and smart patches.
The reference design combines all the hardware components as well as the software required to implement blood pressure measurement, heart-rate measurement (HRM), heart rate variability (HRV) and electrocardiograms (ECG). The solution also enables calculated measurements of vagal tone and arterial elasticity, as well as skin temperature and skin resistivity via interfaces to external sensors.
The platform is built around the firm’s tiny vital signs sensor chip AS7024 that includes three LEDs, photodiodes, an optical front end and sequencer for HRM, and an analog front end for ECG in a low-profile 6.1mm x 2.7mm package.
ams noted that the platform can perform accurate, fast and convenient 24/7 cuffless blood pressure measurement. The accuracy of the AS7024’s blood pressure measurements has been validated in a clinical trial carried out at the Medical University of Graz in Austria, according to IEEE standard for cuffless wearable devices.
As stated in the announcement, the AS7024 HRM operation is based on photoplethysmography (PPG), a proven technique that measures the pulse rate by sampling light modulated by the blood vessels, which expand and contract as blood pulses through them. Electrocardiography is a standard method for measuring the electrical pulses generated by the sinoatrial node of the heart.
The proprietary software in the reference design analyzes synchronized HRM and ECG measurements to calculate blood pressure.
Pricing & Availability:
The AS7024 vital signs sensor is available now in production volumes. Unit pricing is <$2.00 for the sensor frontend IC in order quantities of 1 million pieces.
The reference design and evaluation board for the AS7024 is available on request. It includes an ams Simblee Bluetooth wireless module for connectivity, wireless charging capability and a smartphone app which displays measurements of heart rate, blood pressure, vagal tone and arterial elasticity